Re: [gmx-users] Berger lipid

2012-06-30 Thread Shima Arasteh
Dear Peter,
Thanks for your link and the article.
I'd like to know more about your paper. You've mentioned in it that the 
temperature of POPC equilibrated, is 310 K. As I saw in Justin's tutorial , 323 
K is proper, however it was a different system simulated and also many 
parameters are not the same as your system . Would you telling me about the 
reason of 310 K?

Thanks in advance

 
Sincerely,
Shima


- Original Message -
From: Peter C. Lai p...@uab.edu
To: Shima Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS 
users gmx-users@gromacs.org
Cc: 
Sent: Friday, June 29, 2012 2:54 PM
Subject: Re: [gmx-users] Berger lipid

yes
http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract

The files are here:
http://uab.hyperfine.info/~pcl/files/popc36/

On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:
 Yes, I remember now...you are right :) But I didn't know the 
 linked you sent me, was your own output! However  I wanted to know if it is 
 necessary to produce the .itp file on my own or not.
 
 I still have this link, so will cite to you. It would be a good idea to see 
 its package in lipidbook too.
 Thanks Peter
 
 
 
 
 Sincerely,
 Shima
 
 
 
 From: Peter Lai p...@uab.edu
 To: Discussion list for GROMACS users gmx-users@gromacs.org 
 Sent: Friday, June 29, 2012 7:14 AM
 Subject: RE: [gmx-users] Berger lipid
 
 Uh didn't we go through all of this like more than a month ago? I published a 
 paper using C36 POPC and even a linked to my popc.itp for it on this list...
 
 Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
 will result in an identical file...
 
 Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
 
 From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
 of Justin A. Lemkul [jalem...@vt.edu]
 Sent: Thursday, June 28, 2012 7:56 PM
 To: Discussion list for GROMACS users
 Subject: Re: [gmx-users] Berger lipid
 
 On 6/28/12 8:54 PM, Shima Arasteh wrote:
  Yes, I know that as studied the Kalp15 tutorial.
  Sorry, the last question :)
  :
 
     DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
 ok?  Because I see that POPC.itp is also required for simulation of protein 
 in bilayer.
 
 
 You need a topology of some sort.  It depends on what parameters you have on
 hand.  If you do not have popc.itp from anywhere, then you need to generate it
 somehow.  If it is present in the .rtp file for CHARMM36 that you have, then 
 you
 can run pdb2gmx on it.
 
 -Justin
 
 --
 
 
 Justin A. Lemkul, Ph.D.
 Research Scientist
 Department of Biochemistry
 Virginia Tech
 Blacksburg, VA
 jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
 
 
 
 
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Re: [gmx-users] Berger lipid

2012-06-30 Thread Justin A. Lemkul



On 6/30/12 10:33 AM, Shima Arasteh wrote:

Dear Peter, Thanks for your link and the article. I'd like to know more about
your paper. You've mentioned in it that the temperature of POPC equilibrated,
is 310 K. As I saw in Justin's tutorial , 323 K is proper, however it was a


I'll let Peter address the question directed to him, but I want to refute 
something stated here.  One should not say that for membrane simulations 323 K 
is proper.  I explain in the tutorial why this particular temperature is used 
in the context of DPPC only.  I also provide a table of phase transition 
temperatures for several lipids to explain the reason why the elevated 
temperature was required in this case.


-Justin


different system simulated and also many parameters are not the same as your
system . Would you telling me about the reason of 310 K?

Thanks in advance


Sincerely, Shima


- Original Message - From: Peter C. Lai p...@uab.edu To: Shima
Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS users
gmx-users@gromacs.org Cc: Sent: Friday, June 29, 2012 2:54 PM Subject: Re:
[gmx-users] Berger lipid

yes
http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract

 The files are here: http://uab.hyperfine.info/~pcl/files/popc36/

On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:

Yes, I remember now...you are right :) But I didn't know
the linked you sent me, was your own output! However  I wanted to know if
it is necessary to produce the .itp file on my own or not.

I still have this link, so will cite to you. It would be a good idea to see
its package in lipidbook too. Thanks Peter




Sincerely, Shima


 From: Peter Lai p...@uab.edu To:
Discussion list for GROMACS users gmx-users@gromacs.org Sent: Friday,
June 29, 2012 7:14 AM Subject: RE: [gmx-users] Berger lipid

Uh didn't we go through all of this like more than a month ago? I published
a paper using C36 POPC and even a linked to my popc.itp for it on this
list...

Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly
certain will result in an identical file...

Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
 From:
gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf of
Justin A. Lemkul [jalem...@vt.edu] Sent: Thursday, June 28, 2012 7:56 PM
To: Discussion list for GROMACS users Subject: Re: [gmx-users] Berger
lipid

On 6/28/12 8:54 PM, Shima Arasteh wrote:

Yes, I know that as studied the Kalp15 tutorial. Sorry, the last question
:) :

DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it
ok?  Because I see that POPC.itp is also required for simulation of
protein in bilayer.



You need a topology of some sort.  It depends on what parameters you have
on hand.  If you do not have popc.itp from anywhere, then you need to
generate it somehow.  If it is present in the .rtp file for CHARMM36 that
you have, then you can run pdb2gmx on it.

-Justin

-- 

Justin A. Lemkul, Ph.D. Research Scientist Department of Biochemistry
Virginia Tech Blacksburg, VA jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-30 Thread Shima Arasteh
Thanks Justin.
Yes, you are right. You wrote the tutorial for DPPC and I know that.

ok, I saw the temperatures upper than 271 K is proper for POPC. It's acceptable 
that 310 mentioned in Peter's paper is correct. But I'm wondering how they 
chose 310 K? In his article, he explains that their study was done in 
mammalian cells.

 
Sincerely,
Shima


- Original Message -
From: Justin A. Lemkul jalem...@vt.edu
To: Shima Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS 
users gmx-users@gromacs.org
Cc: 
Sent: Saturday, June 30, 2012 7:15 PM
Subject: Re: [gmx-users] Berger lipid



On 6/30/12 10:33 AM, Shima Arasteh wrote:
 Dear Peter, Thanks for your link and the article. I'd like to know more about
 your paper. You've mentioned in it that the temperature of POPC equilibrated,
 is 310 K. As I saw in Justin's tutorial , 323 K is proper, however it was a

I'll let Peter address the question directed to him, but I want to refute 
something stated here.  One should not say that for membrane simulations 323 K 
is proper.  I explain in the tutorial why this particular temperature is used 
in the context of DPPC only.  I also provide a table of phase transition 
temperatures for several lipids to explain the reason why the elevated 
temperature was required in this case.

-Justin

 different system simulated and also many parameters are not the same as your
 system . Would you telling me about the reason of 310 K?

 Thanks in advance


 Sincerely, Shima


 - Original Message - From: Peter C. Lai p...@uab.edu To: Shima
 Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS users
 gmx-users@gromacs.org Cc: Sent: Friday, June 29, 2012 2:54 PM Subject: Re:
 [gmx-users] Berger lipid

 yes
 http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract

  The files are here: http://uab.hyperfine.info/~pcl/files/popc36/

 On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:
 Yes, I remember now...you are right :) But I didn't know
 the linked you sent me, was your own output! However  I wanted to know if
 it is necessary to produce the .itp file on my own or not.

 I still have this link, so will cite to you. It would be a good idea to see
 its package in lipidbook too. Thanks Peter




 Sincerely, Shima


  From: Peter Lai p...@uab.edu To:
 Discussion list for GROMACS users gmx-users@gromacs.org Sent: Friday,
 June 29, 2012 7:14 AM Subject: RE: [gmx-users] Berger lipid

 Uh didn't we go through all of this like more than a month ago? I published
 a paper using C36 POPC and even a linked to my popc.itp for it on this
 list...

 Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly
 certain will result in an identical file...

 Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
  From:
 gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf of
 Justin A. Lemkul [jalem...@vt.edu] Sent: Thursday, June 28, 2012 7:56 PM
 To: Discussion list for GROMACS users Subject: Re: [gmx-users] Berger
 lipid

 On 6/28/12 8:54 PM, Shima Arasteh wrote:
 Yes, I know that as studied the Kalp15 tutorial. Sorry, the last question
 :) :

 DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it
 ok?  Because I see that POPC.itp is also required for simulation of
 protein in bilayer.


 You need a topology of some sort.  It depends on what parameters you have
 on hand.  If you do not have popc.itp from anywhere, then you need to
 generate it somehow.  If it is present in the .rtp file for CHARMM36 that
 you have, then you can run pdb2gmx on it.

 -Justin

 -- 

 Justin A. Lemkul, Ph.D. Research Scientist Department of Biochemistry
 Virginia Tech Blacksburg, VA jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

 


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 Only plain text

Re: [gmx-users] Berger lipid

2012-06-30 Thread Justin A. Lemkul



On 6/30/12 11:03 AM, Shima Arasteh wrote:

Thanks Justin.
Yes, you are right. You wrote the tutorial for DPPC and I know that.

ok, I saw the temperatures upper than 271 K is proper for POPC. It's acceptable that 310 
mentioned in Peter's paper is correct. But I'm wondering how they chose 310 
K? In his article, he explains that their study was done in mammalian cells.




310 K is physiological temperature for the human body.  Peter, please correct me 
if this was not the intent of your study.


-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-30 Thread Shima Arasteh


Yes, you are right. You wrote the tutorial for DPPC and I know that.

ok, I saw the temperatures upper than 271 K is proper for POPC. It's acceptable 
that 310 mentioned in Peter's paper is correct. But I'm wondering how they 
chose 310 K? In his article, he explains that their study was done in 
mammalian cells. Is this the reason of this T? They mean 37 centigrades. Right? 

 
Sincerely,
Shima


- Original Message -
From: Justin A. Lemkul jalem...@vt.edu
To: Shima Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS 
users gmx-users@gromacs.org
Cc: 
Sent: Saturday, June 30, 2012 7:15 PM
Subject: Re: [gmx-users] Berger lipid



On 6/30/12 10:33 AM, Shima Arasteh wrote:
 Dear Peter, Thanks for your link and the article. I'd like to know more about
 your paper. You've mentioned in it that the temperature of POPC equilibrated,
 is 310 K. As I saw in Justin's tutorial , 323 K is proper, however it was a

I'll let Peter address the question directed to him, but I want to refute 
something stated here.  One should not say that for membrane simulations 323 K 
is proper.  I explain in the tutorial why this particular temperature is used 
in the context of DPPC only.  I also provide a table of phase transition 
temperatures for several lipids to explain the reason why the elevated 
temperature was required in this case.

-Justin

 different system simulated and also many parameters are not the same as your
 system . Would you telling me about the reason of 310 K?

 Thanks in advance


 Sincerely, Shima


 - Original Message - From: Peter C. Lai p...@uab.edu To: Shima
 Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS users
 gmx-users@gromacs.org Cc: Sent: Friday, June 29, 2012 2:54 PM Subject: Re:
 [gmx-users] Berger lipid

 yes
 http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract

  The files are here: http://uab.hyperfine.info/~pcl/files/popc36/

 On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:
 Yes, I remember now...you are right :) But I didn't know
 the linked you sent me, was your own output! However  I wanted to know if
 it is necessary to produce the .itp file on my own or not.

 I still have this link, so will cite to you. It would be a good idea to see
 its package in lipidbook too. Thanks Peter




 Sincerely, Shima


  From: Peter Lai p...@uab.edu To:
 Discussion list for GROMACS users gmx-users@gromacs.org Sent: Friday,
 June 29, 2012 7:14 AM Subject: RE: [gmx-users] Berger lipid

 Uh didn't we go through all of this like more than a month ago? I published
 a paper using C36 POPC and even a linked to my popc.itp for it on this
 list...

 Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly
 certain will result in an identical file...

 Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
  From:
 gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf of
 Justin A. Lemkul [jalem...@vt.edu] Sent: Thursday, June 28, 2012 7:56 PM
 To: Discussion list for GROMACS users Subject: Re: [gmx-users] Berger
 lipid

 On 6/28/12 8:54 PM, Shima Arasteh wrote:
 Yes, I know that as studied the Kalp15 tutorial. Sorry, the last question
 :) :

 DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it
 ok?  Because I see that POPC.itp is also required for simulation of
 protein in bilayer.


 You need a topology of some sort.  It depends on what parameters you have
 on hand.  If you do not have popc.itp from anywhere, then you need to
 generate it somehow.  If it is present in the .rtp file for CHARMM36 that
 you have, then you can run pdb2gmx on it.

 -Justin

 -- 

 Justin A. Lemkul, Ph.D. Research Scientist Department of Biochemistry
 Virginia Tech Blacksburg, VA jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

 


 -- gmx-users mailing list    gmx-users@gromacs.org
 http://lists.gromacs.org/mailman/listinfo/gmx-users * Only plain text
 messages are allowed! * Please search the archive at
 http://www.gromacs.org/Support/Mailing_Lists/Search before posting! *
 Please don't post (un)subscribe requests to the list. Use the www interface
 or send it to gmx-users-requ...@gromacs.org. * Can't post? Read
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 gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users *
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Re: [gmx-users] Berger lipid

2012-06-30 Thread Peter C. Lai
323 is proper for a higher melting point lipid like DPPC. You can easily 
simulate POPC at 300, and many other people have done so.  In fact I received 
criticism from a reviewer as to why I picked an elevated temperature of 310, 
despite the fact that 310 is physiological temperature (to make some 
experimentalist reviewers happy). Some early rhodopsin runs were done at
310 and I'm pretty sure that was included as a reference in the rationale
for the elevated temperature (besides the standard 310 is well above the
solid phase transition temperature for POPC line). Neither the g_membed
authors nor Klauda run POPC above 310K if I remember correctly.

On 2012-06-30 07:33:38AM -0700, Shima Arasteh wrote:
 Dear Peter,
 Thanks for your link and the article.
 I'd like to know more about your paper. You've mentioned in it that the 
 temperature of POPC equilibrated, is 310 K. As I saw in Justin's tutorial , 
 323 K is proper, however it was a different system simulated and also many 
 parameters are not the same as your system . Would you telling me about the 
 reason of 310 K?
 
 Thanks in advance
 
  
 Sincerely,
 Shima
 
 
 - Original Message -
 From: Peter C. Lai p...@uab.edu
 To: Shima Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS 
 users gmx-users@gromacs.org
 Cc: 
 Sent: Friday, June 29, 2012 2:54 PM
 Subject: Re: [gmx-users] Berger lipid
 
 yes
 http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract
 
 The files are here:
 http://uab.hyperfine.info/~pcl/files/popc36/
 
 On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:
  Yes, I remember now...you are right :) But I didn't know 
  the linked you sent me, was your own output! However  I wanted to know if 
  it is necessary to produce the .itp file on my own or not.
  
  I still have this link, so will cite to you. It would be a good idea to see 
  its package in lipidbook too.
  Thanks Peter
  
  
  
  
  Sincerely,
  Shima
  
  
  
  From: Peter Lai p...@uab.edu
  To: Discussion list for GROMACS users gmx-users@gromacs.org 
  Sent: Friday, June 29, 2012 7:14 AM
  Subject: RE: [gmx-users] Berger lipid
  
  Uh didn't we go through all of this like more than a month ago? I published 
  a paper using C36 POPC and even a linked to my popc.itp for it on this 
  list...
  
  Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly 
  certain will result in an identical file...
  
  Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
  
  From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on 
  behalf of Justin A. Lemkul [jalem...@vt.edu]
  Sent: Thursday, June 28, 2012 7:56 PM
  To: Discussion list for GROMACS users
  Subject: Re: [gmx-users] Berger lipid
  
  On 6/28/12 8:54 PM, Shima Arasteh wrote:
   Yes, I know that as studied the Kalp15 tutorial.
   Sorry, the last question :)
   :
  
      DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is 
  it ok?  Because I see that POPC.itp is also required for simulation of 
  protein in bilayer.
  
  
  You need a topology of some sort.  It depends on what parameters you have on
  hand.  If you do not have popc.itp from anywhere, then you need to generate 
  it
  somehow.  If it is present in the .rtp file for CHARMM36 that you have, 
  then you
  can run pdb2gmx on it.
  
  -Justin
  
  --
  
  
  Justin A. Lemkul, Ph.D.
  Research Scientist
  Department of Biochemistry
  Virginia Tech
  Blacksburg, VA
  jalemkul[at]vt.edu | (540) 231-9080
  http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
  
  
  
  
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Re: [gmx-users] Berger lipid

2012-06-30 Thread Shima Arasteh
Dear Peter,
I appreciate your explanation  :)  


Regards,

Shima


- Original Message -
From: Peter C. Lai p...@uab.edu
To: Shima Arasteh shima_arasteh2...@yahoo.com
Cc: Discussion list for GROMACS users gmx-users@gromacs.org
Sent: Saturday, June 30, 2012 8:57 PM
Subject: Re: [gmx-users] Berger lipid

323 is proper for a higher melting point lipid like DPPC. You can easily 
simulate POPC at 300, and many other people have done so.  In fact I received 
criticism from a reviewer as to why I picked an elevated temperature of 310, 
despite the fact that 310 is physiological temperature (to make some 
experimentalist reviewers happy). Some early rhodopsin runs were done at
310 and I'm pretty sure that was included as a reference in the rationale
for the elevated temperature (besides the standard 310 is well above the
solid phase transition temperature for POPC line). Neither the g_membed
authors nor Klauda run POPC above 310K if I remember correctly.

On 2012-06-30 07:33:38AM -0700, Shima Arasteh wrote:
 Dear Peter,
 Thanks for your link and the article.
 I'd like to know more about your paper. You've mentioned in it that the 
 temperature of POPC equilibrated, is 310 K. As I saw in Justin's tutorial , 
 323 K is proper, however it was a different system simulated and also many 
 parameters are not the same as your system . Would you telling me about the 
 reason of 310 K?
 
 Thanks in advance
 
  
 Sincerely,
 Shima
 
 
 - Original Message -
 From: Peter C. Lai p...@uab.edu
 To: Shima Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS 
 users gmx-users@gromacs.org
 Cc: 
 Sent: Friday, June 29, 2012 2:54 PM
 Subject: Re: [gmx-users] Berger lipid
 
 yes
 http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract
 
 The files are here:
 http://uab.hyperfine.info/~pcl/files/popc36/
 
 On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:
  Yes, I remember now...you are right :) But I didn't know 
  the linked you sent me, was your own output! However  I wanted to know if 
  it is necessary to produce the .itp file on my own or not.
  
  I still have this link, so will cite to you. It would be a good idea to see 
  its package in lipidbook too.
  Thanks Peter
  
  
  
  
  Sincerely,
  Shima
  
  
  
  From: Peter Lai p...@uab.edu
  To: Discussion list for GROMACS users gmx-users@gromacs.org 
  Sent: Friday, June 29, 2012 7:14 AM
  Subject: RE: [gmx-users] Berger lipid
  
  Uh didn't we go through all of this like more than a month ago? I published 
  a paper using C36 POPC and even a linked to my popc.itp for it on this 
  list...
  
  Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly 
  certain will result in an identical file...
  
  Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
  
  From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on 
  behalf of Justin A. Lemkul [jalem...@vt.edu]
  Sent: Thursday, June 28, 2012 7:56 PM
  To: Discussion list for GROMACS users
  Subject: Re: [gmx-users] Berger lipid
  
  On 6/28/12 8:54 PM, Shima Arasteh wrote:
   Yes, I know that as studied the Kalp15 tutorial.
   Sorry, the last question :)
   :
  
      DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is 
  it ok?  Because I see that POPC.itp is also required for simulation of 
  protein in bilayer.
  
  
  You need a topology of some sort.  It depends on what parameters you have on
  hand.  If you do not have popc.itp from anywhere, then you need to generate 
  it
  somehow.  If it is present in the .rtp file for CHARMM36 that you have, 
  then you
  can run pdb2gmx on it.
  
  -Justin
  
  --
  
  
  Justin A. Lemkul, Ph.D.
  Research Scientist
  Department of Biochemistry
  Virginia Tech
  Blacksburg, VA
  jalemkul[at]vt.edu | (540) 231-9080
  http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
  
  
  
  
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Re: [gmx-users] Berger lipid

2012-06-29 Thread Thomas Piggot

Hi Shima,

The lipids.rtp file in the charmm36.ff folder has many different entries 
for lipids. All you need to do is to run pdb2gmx with just one of your 
lipids of interest. This will produce a .top for this one lipid which is 
trivial to convert into an .itp (see Chapter 5 of the manual).


Cheers

Tom

Peter Lai wrote:

Uh didn't we go through all of this like more than a month ago? I published a 
paper using C36 POPC and even a linked to my popc.itp for it on this list...

Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
will result in an identical file...

Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.

From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
of Justin A. Lemkul [jalem...@vt.edu]
Sent: Thursday, June 28, 2012 7:56 PM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] Berger lipid

On 6/28/12 8:54 PM, Shima Arasteh wrote:

Yes, I know that as studied the Kalp15 tutorial.
Sorry, the last question :)
:

   DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it ok?  
Because I see that POPC.itp is also required for simulation of protein in 
bilayer.



You need a topology of some sort.  It depends on what parameters you have on
hand.  If you do not have popc.itp from anywhere, then you need to generate it
somehow.  If it is present in the .rtp file for CHARMM36 that you have, then you
can run pdb2gmx on it.

-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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University of Southampton, UK.
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Re: [gmx-users] Berger lipid

2012-06-29 Thread Shima Arasteh
Dear Thomas,
It's a good idea. Thanks :)

 
Sincerely,
Shima


- Original Message -
From: Thomas Piggot t.pig...@soton.ac.uk
To: Discussion list for GROMACS users gmx-users@gromacs.org
Cc: 
Sent: Friday, June 29, 2012 1:39 PM
Subject: Re: [gmx-users] Berger lipid

Hi Shima,

The lipids.rtp file in the charmm36.ff folder has many different entries for 
lipids. All you need to do is to run pdb2gmx with just one of your lipids of 
interest. This will produce a .top for this one lipid which is trivial to 
convert into an .itp (see Chapter 5 of the manual).

Cheers

Tom

Peter Lai wrote:
 Uh didn't we go through all of this like more than a month ago? I published a 
 paper using C36 POPC and even a linked to my popc.itp for it on this list...
 
 Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
 will result in an identical file...
 
 Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
 
 From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
 of Justin A. Lemkul [jalem...@vt.edu]
 Sent: Thursday, June 28, 2012 7:56 PM
 To: Discussion list for GROMACS users
 Subject: Re: [gmx-users] Berger lipid
 
 On 6/28/12 8:54 PM, Shima Arasteh wrote:
 Yes, I know that as studied the Kalp15 tutorial.
 Sorry, the last question :)
 :
 
    DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
ok?  Because I see that POPC.itp is also required for simulation of protein 
in bilayer.
 
 
 You need a topology of some sort.  It depends on what parameters you have on
 hand.  If you do not have popc.itp from anywhere, then you need to generate it
 somehow.  If it is present in the .rtp file for CHARMM36 that you have, then 
 you
 can run pdb2gmx on it.
 
 -Justin
 
 --
 
 
 Justin A. Lemkul, Ph.D.
 Research Scientist
 Department of Biochemistry
 Virginia Tech
 Blacksburg, VA
 jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
 
 
 
 
 --
 gmx-users mailing list    gmx-users@gromacs.org
 http://lists.gromacs.org/mailman/listinfo/gmx-users
 * Only plain text messages are allowed!
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-- Dr Thomas Piggot
University of Southampton, UK.
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Re: [gmx-users] Berger lipid

2012-06-29 Thread Peter C. Lai
yes
http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract

The files are here:
http://uab.hyperfine.info/~pcl/files/popc36/

On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:
 Yes, I remember now...you are right :) But I didn't know the 
 linked you sent me, was your own output! However  I wanted to know if it is 
 necessary to produce the .itp file on my own or not.
 
 I still have this link, so will cite to you. It would be a good idea to see 
 its package in lipidbook too.
 Thanks Peter
 
 
 
 
 Sincerely,
 Shima
 
 
 
 From: Peter Lai p...@uab.edu
 To: Discussion list for GROMACS users gmx-users@gromacs.org 
 Sent: Friday, June 29, 2012 7:14 AM
 Subject: RE: [gmx-users] Berger lipid
 
 Uh didn't we go through all of this like more than a month ago? I published a 
 paper using C36 POPC and even a linked to my popc.itp for it on this list...
 
 Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
 will result in an identical file...
 
 Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
 
 From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
 of Justin A. Lemkul [jalem...@vt.edu]
 Sent: Thursday, June 28, 2012 7:56 PM
 To: Discussion list for GROMACS users
 Subject: Re: [gmx-users] Berger lipid
 
 On 6/28/12 8:54 PM, Shima Arasteh wrote:
  Yes, I know that as studied the Kalp15 tutorial.
  Sorry, the last question :)
  :
 
     DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
 ok?  Because I see that POPC.itp is also required for simulation of protein 
 in bilayer.
 
 
 You need a topology of some sort.  It depends on what parameters you have on
 hand.  If you do not have popc.itp from anywhere, then you need to generate it
 somehow.  If it is present in the .rtp file for CHARMM36 that you have, then 
 you
 can run pdb2gmx on it.
 
 -Justin
 
 --
 
 
 Justin A. Lemkul, Ph.D.
 Research Scientist
 Department of Biochemistry
 Virginia Tech
 Blacksburg, VA
 jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
 
 
 
 
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-- 
==
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Programmer/Analyst  | KAUL 752A
Genetics, Div. of Research  | 705 South 20th Street
p...@uab.edu| Birmingham AL 35294-4461
(205) 690-0808  |
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Re: [gmx-users] Berger lipid

2012-06-29 Thread Shima Arasteh
Dear Peter,
Thanks a lot :) 

 
Sincerely,
Shima


- Original Message -
From: Peter C. Lai p...@uab.edu
To: Shima Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS 
users gmx-users@gromacs.org
Cc: 
Sent: Friday, June 29, 2012 2:54 PM
Subject: Re: [gmx-users] Berger lipid

yes
http://www.frontiersin.org/Bioinformatics_and_Computational_Biology/10.3389/fgene.2012.00061/abstract

The files are here:
http://uab.hyperfine.info/~pcl/files/popc36/

On 2012-06-28 09:58:26PM -0700, Shima Arasteh wrote:
 Yes, I remember now...you are right :) But I didn't know the 
 linked you sent me, was your own output! However  I wanted to know if it is 
 necessary to produce the .itp file on my own or not.
 
 I still have this link, so will cite to you. It would be a good idea to see 
 its package in lipidbook too.
 Thanks Peter
 
 
 
 
 Sincerely,
 Shima
 
 
 
 From: Peter Lai p...@uab.edu
 To: Discussion list for GROMACS users gmx-users@gromacs.org 
 Sent: Friday, June 29, 2012 7:14 AM
 Subject: RE: [gmx-users] Berger lipid
 
 Uh didn't we go through all of this like more than a month ago? I published a 
 paper using C36 POPC and even a linked to my popc.itp for it on this list...
 
 Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
 will result in an identical file...
 
 Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.
 
 From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
 of Justin A. Lemkul [jalem...@vt.edu]
 Sent: Thursday, June 28, 2012 7:56 PM
 To: Discussion list for GROMACS users
 Subject: Re: [gmx-users] Berger lipid
 
 On 6/28/12 8:54 PM, Shima Arasteh wrote:
  Yes, I know that as studied the Kalp15 tutorial.
  Sorry, the last question :)
  :
 
     DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
 ok?  Because I see that POPC.itp is also required for simulation of protein 
 in bilayer.
 
 
 You need a topology of some sort.  It depends on what parameters you have on
 hand.  If you do not have popc.itp from anywhere, then you need to generate it
 somehow.  If it is present in the .rtp file for CHARMM36 that you have, then 
 you
 can run pdb2gmx on it.
 
 -Justin
 
 --
 
 
 Justin A. Lemkul, Ph.D.
 Research Scientist
 Department of Biochemistry
 Virginia Tech
 Blacksburg, VA
 jalemkul[at]vt.edu | (540) 231-9080
 http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
 
 
 
 
 --
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-- 
==
Peter C. Lai            | University of Alabama-Birmingham
Programmer/Analyst        | KAUL 752A
Genetics, Div. of Research    | 705 South 20th Street
p...@uab.edu            | Birmingham AL 35294-4461
(205) 690-0808            |
==
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[gmx-users] Berger lipid

2012-06-28 Thread Shima Arasteh
Hi all,

I want to simulate a protein in POPC bilayer by CHARMM27 FF. I know 
phospholipids and protein are defined well in CHARMM27. Is Berger lipid 
required ? 
 
Thanks for your replies in advance.
Sincerely,
Shima
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Re: [gmx-users] Berger lipid

2012-06-28 Thread Justin A. Lemkul



On 6/28/12 8:15 PM, Shima Arasteh wrote:

Hi all,

I want to simulate a protein in POPC bilayer by CHARMM27 FF. I know 
phospholipids and protein are defined well in CHARMM27. Is Berger lipid 
required ?



No, these are different force fields entirely.  The CHARMM36 parameter set is 
better for lipids than CHARMM27.


-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-28 Thread Shima Arasteh
Thanks.
Yes, you told me this before CHARMM36 is better than CHARMM27. But I'm afraid 
of using  C36. Because I think it's a newer FF and and less studies have done 
by it. Then if I face a problem, I can't find a way through articles! 

Don't you think so?

 
Sincerely,
Shima


- Original Message -
From: Justin A. Lemkul jalem...@vt.edu
To: Shima Arasteh shima_arasteh2...@yahoo.com; Discussion list for GROMACS 
users gmx-users@gromacs.org
Cc: 
Sent: Friday, June 29, 2012 4:46 AM
Subject: Re: [gmx-users] Berger lipid



On 6/28/12 8:15 PM, Shima Arasteh wrote:
 Hi all,

 I want to simulate a protein in POPC bilayer by CHARMM27 FF. I know 
 phospholipids and protein are defined well in CHARMM27. Is Berger lipid 
 required ?


No, these are different force fields entirely.  The CHARMM36 parameter set is 
better for lipids than CHARMM27.

-Justin

-- 


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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Re: [gmx-users] Berger lipid

2012-06-28 Thread Justin A. Lemkul



On 6/28/12 8:23 PM, Shima Arasteh wrote:

Thanks.
Yes, you told me this before CHARMM36 is better than CHARMM27. But I'm afraid 
of using  C36. Because I think it's a newer FF and and less studies have done 
by it. Then if I face a problem, I can't find a way through articles!

Don't you think so?



CHARMM36 was developed by the core CHARMM developers and I have no reason to 
doubt it.  If there was ever a group to develop good CHARMM parameters, it's them :)


Simply being newer is not a reason to doubt it.  Have you read the paper where 
the parameters were derived?  The reproduction of experimental observables is 
quite good.  Ultimately, the choice is yours, but be ready to justify that 
choice to a skeptical audience (reviewers).


-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-28 Thread Shima Arasteh

 
Yes, I have studied the article by Jeffery B. Klauda and other articles related 
to C36. And know where the parameters of CHARMM36 were derived. 

By the way, when I search the lipidbook to find the .itp file I can't find it! 
What about the lipid .itp ? Is it required yet? ( in your tutorial it's written 
lipid.itp - Berger lipid parameters )

Sincerely,
Shima


- Original Message -
From: Justin A. Lemkul jalem...@vt.edu
To: Discussion list for GROMACS users gmx-users@gromacs.org
Cc: 
Sent: Friday, June 29, 2012 4:58 AM
Subject: Re: [gmx-users] Berger lipid



On 6/28/12 8:23 PM, Shima Arasteh wrote:
 Thanks.
 Yes, you told me this before CHARMM36 is better than CHARMM27. But I'm afraid 
 of using  C36. Because I think it's a newer FF and and less studies have done 
 by it. Then if I face a problem, I can't find a way through articles!
 
 Don't you think so?
 

CHARMM36 was developed by the core CHARMM developers and I have no reason to 
doubt it.  If there was ever a group to develop good CHARMM parameters, it's 
them :)

Simply being newer is not a reason to doubt it.  Have you read the paper 
where the parameters were derived?  The reproduction of experimental 
observables is quite good.  Ultimately, the choice is yours, but be ready to 
justify that choice to a skeptical audience (reviewers).

-Justin

-- 

Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-28 Thread Justin A. Lemkul



On 6/28/12 8:43 PM, Shima Arasteh wrote:



Yes, I have studied the article by Jeffery B. Klauda and other articles related 
to C36. And know where the parameters of CHARMM36 were derived.

By the way, when I search the lipidbook to find the .itp file I can't find it! What about 
the lipid .itp ? Is it required yet? ( in your tutorial it's written lipid.itp - 
Berger lipid parameters )



You do not need the so-called lipid.itp as it is for a completely different 
force field.  The Berger lipids are a united-atom parameter set derived in 
1997 from a hybrid of OPLS and Gromos parameters.  They are typically combined 
with Gromos force fields.


-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-28 Thread Shima Arasteh
Yes, I know that as studied the Kalp15 tutorial.
Sorry, the last question :) 
:

  DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it ok?  
Because I see that POPC.itp is also required for simulation of protein in 
bilayer.

Again, thanks

 
Sincerely,
Shima


- Original Message -
From: Justin A. Lemkul jalem...@vt.edu
To: Discussion list for GROMACS users gmx-users@gromacs.org
Cc: 
Sent: Friday, June 29, 2012 5:16 AM
Subject: Re: [gmx-users] Berger lipid



On 6/28/12 8:43 PM, Shima Arasteh wrote:
 
 
 Yes, I have studied the article by Jeffery B. Klauda and other articles 
 related to C36. And know where the parameters of CHARMM36 were derived.
 
 By the way, when I search the lipidbook to find the .itp file I can't find 
 it! What about the lipid .itp ? Is it required yet? ( in your tutorial it's 
 written lipid.itp - Berger lipid parameters )
 

You do not need the so-called lipid.itp as it is for a completely different 
force field.  The Berger lipids are a united-atom parameter set derived in 
1997 from a hybrid of OPLS and Gromos parameters.  They are typically combined 
with Gromos force fields.

-Justin

-- 

Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-28 Thread Justin A. Lemkul



On 6/28/12 8:54 PM, Shima Arasteh wrote:

Yes, I know that as studied the Kalp15 tutorial.
Sorry, the last question :)
:

   DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it ok?  
Because I see that POPC.itp is also required for simulation of protein in 
bilayer.



You need a topology of some sort.  It depends on what parameters you have on 
hand.  If you do not have popc.itp from anywhere, then you need to generate it 
somehow.  If it is present in the .rtp file for CHARMM36 that you have, then you 
can run pdb2gmx on it.


-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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RE: [gmx-users] Berger lipid

2012-06-28 Thread Peter Lai
Uh didn't we go through all of this like more than a month ago? I published a 
paper using C36 POPC and even a linked to my popc.itp for it on this list...

Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
will result in an identical file...

Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.

From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
of Justin A. Lemkul [jalem...@vt.edu]
Sent: Thursday, June 28, 2012 7:56 PM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] Berger lipid

On 6/28/12 8:54 PM, Shima Arasteh wrote:
 Yes, I know that as studied the Kalp15 tutorial.
 Sorry, the last question :)
 :

DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
 ok?  Because I see that POPC.itp is also required for simulation of protein 
 in bilayer.


You need a topology of some sort.  It depends on what parameters you have on
hand.  If you do not have popc.itp from anywhere, then you need to generate it
somehow.  If it is present in the .rtp file for CHARMM36 that you have, then you
can run pdb2gmx on it.

-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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[gmx-users] Berger lipid

2012-06-28 Thread Christopher Neale
I am sure that a lot of this could be avoided if the gromacs users-list search 
feature worked. 
Every search that I do returns ten to one hundred versions of each hit, making 
it nearly unusable.
Google is ok, but it doesn't search the gromacs list nearly as well as the old 
specific search on the
gromacs website did before the website changes.

Given the current state of the list search feature, it's not really feasible to 
ask people to search first, unfortunately.

Chris.

-- original message --


Uh didn't we go through all of this like more than a month ago? I published a 
paper using C36 POPC and even a linked to my popc.itp for it on this list...

Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
will result in an identical file...

Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.

From: gmx-users-bounces at gromacs.org [gmx-users-bounces at gromacs.org] on 
behalf of Justin A. Lemkul [jalemkul at vt.edu]
Sent: Thursday, June 28, 2012 7:56 PM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] Berger lipid

On 6/28/12 8:54 PM, Shima Arasteh wrote:
 Yes, I know that as studied the Kalp15 tutorial.
 Sorry, the last question :)
 :

DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
 ok?  Because I see that POPC.itp is also required for simulation of protein 
 in bilayer.


You need a topology of some sort.  It depends on what parameters you have on
hand.  If you do not have popc.itp from anywhere, then you need to generate it
somehow.  If it is present in the .rtp file for CHARMM36 that you have, then you
can run pdb2gmx on it.

-Justin

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Re: [gmx-users] Berger lipid

2012-06-28 Thread Shima Arasteh
Yes, I remember now...you are right :) But I didn't know the 
linked you sent me, was your own output! However  I wanted to know if it is 
necessary to produce the .itp file on my own or not.

I still have this link, so will cite to you. It would be a good idea to see its 
package in lipidbook too.
Thanks Peter




Sincerely,
Shima



From: Peter Lai p...@uab.edu
To: Discussion list for GROMACS users gmx-users@gromacs.org 
Sent: Friday, June 29, 2012 7:14 AM
Subject: RE: [gmx-users] Berger lipid

Uh didn't we go through all of this like more than a month ago? I published a 
paper using C36 POPC and even a linked to my popc.itp for it on this list...

Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
will result in an identical file...

Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.

From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
of Justin A. Lemkul [jalem...@vt.edu]
Sent: Thursday, June 28, 2012 7:56 PM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] Berger lipid

On 6/28/12 8:54 PM, Shima Arasteh wrote:
 Yes, I know that as studied the Kalp15 tutorial.
 Sorry, the last question :)
 :

    DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
ok?  Because I see that POPC.itp is also required for simulation of protein in 
bilayer.


You need a topology of some sort.  It depends on what parameters you have on
hand.  If you do not have popc.itp from anywhere, then you need to generate it
somehow.  If it is present in the .rtp file for CHARMM36 that you have, then you
can run pdb2gmx on it.

-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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Re: [gmx-users] Berger lipid

2012-06-28 Thread Shima Arasteh
Dear Peter,
Is this article is the one you talked about?
Beyond Modeling: All-Atom Olfactory Receptor Model Simulations
Thanks in advance

 
Sincerely,
Shima


- Original Message -
From: Peter Lai p...@uab.edu
To: Discussion list for GROMACS users gmx-users@gromacs.org
Cc: 
Sent: Friday, June 29, 2012 7:14 AM
Subject: RE: [gmx-users] Berger lipid

Uh didn't we go through all of this like more than a month ago? I published a 
paper using C36 POPC and even a linked to my popc.itp for it on this list...

Of course Shima is welcome to pdb2gmx his own POPC, which I am fairly certain 
will result in an identical file...

Lipidbook seems to only have C36 POPE. I guess maybe I will upload ours.

From: gmx-users-boun...@gromacs.org [gmx-users-boun...@gromacs.org] on behalf 
of Justin A. Lemkul [jalem...@vt.edu]
Sent: Thursday, June 28, 2012 7:56 PM
To: Discussion list for GROMACS users
Subject: Re: [gmx-users] Berger lipid

On 6/28/12 8:54 PM, Shima Arasteh wrote:
 Yes, I know that as studied the Kalp15 tutorial.
 Sorry, the last question :)
 :

    DO I need to run pdb2gmx to get the top file of POPC in CHARMM36? Is it 
ok?  Because I see that POPC.itp is also required for simulation of protein in 
bilayer.


You need a topology of some sort.  It depends on what parameters you have on
hand.  If you do not have popc.itp from anywhere, then you need to generate it
somehow.  If it is present in the .rtp file for CHARMM36 that you have, then you
can run pdb2gmx on it.

-Justin

--


Justin A. Lemkul, Ph.D.
Research Scientist
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin




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