Re: [ccp4bb] Rigaku CrystalTrak Web not working

2021-02-19 Thread Pavel Mader
Hi Johannes,



just making sure that there is no misunderstanding. I am currently working
in Dr. Frank Sicheri lab at Mount Sinai Hospital in Toronto, ON, Canada. Is
this the local installation you are talking about? I am just using my Czech
email account, since I have the CCP4BB already set up on this account...




Thanks,




Pavel


-- Původní e-mail --
Od: Johannes Cramer 
Komu: Pavel Mader 
Datum: 19. 2. 2021 7:04:48
Předmět: Re: [ccp4bb] Rigaku CrystalTrak Web not working
"
  Hey Pavel,



afaik our local installation of the software still works. So if going there
physically is an option for you, you can try that. 




Cheers,

Johannes






Am Do., 18. Feb. 2021 um 18:21 Uhr schrieb Pavel Mader mailto:mader.pa...@seznam.cz)>:

"
Hello everyone,



is there anyone else, who is using Rigaku CrystalTrak Web system (in our 
case version 2.3.4) for checking images of crystallization experiments? 
Recently (on January 14, 2021) the Adobe has stopped supporting the Flash 
support needed for the CrystalTrak web version from being fully functional.




Is there anyone else, who has been facing this problem? Is there any good 
solution?




Thanks,




Pavel Mader




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[ccp4bb] Rigaku CrystalTrak Web not working

2021-02-18 Thread Pavel Mader
Hello everyone,



is there anyone else, who is using Rigaku CrystalTrak Web system (in our 
case version 2.3.4) for checking images of crystallization experiments? 
Recently (on January 14, 2021) the Adobe has stopped supporting the Flash 
support needed for the CrystalTrak web version from being fully functional.




Is there anyone else, who has been facing this problem? Is there any good 
solution?




Thanks,




Pavel Mader



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Re: [ccp4bb] Any guesses? - What is this feature modelled (wrongly) as 3 waters

2019-11-08 Thread Pavel Mader

Hello




Can you provide the list of all the components in the crystallization
experiment? Except the protein of course.




What is the resolution of the structure? Have the B-factors been refined 
anisotropically?




At what sigma level is the 2Fo-Fc map and Fo-Fc map (doesn't seem to be 
shown)?




If I were to take a wild guess - the size might accommodate ethanol
(glycerol and ethylene glycol would be too big already and the geometry 
doesn't look right for metal ion complex either).




Pavel




-- Původní e-mail --
Od: Eleanor Dodson <176a9d5ebad7-dmarc-requ...@jiscmail.ac.uk>
Komu: CCP4BB@JISCMAIL.AC.UK
Datum: 7. 11. 2019 8:12:51
Předmět: [ccp4bb] Any guesses? - What is this feature modelled (wrongly) as
3 waters
"

seen in a high resolution map?




There is at least one other similar feature???




Eleanor





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Re: [ccp4bb] why does Coot ignore CONECT?

2019-11-04 Thread Pavel Mader

Hello Eleanor,




We tried to follow your suggestion.



The atoms to be linked were 1.46A apart in the input pdb model and we ran 10
cycles of refinement in Refmac with the "make link between" option chosen in
either "defined in the file or residues are close". After the refinement we
saw the linkage as dotted line and the distance between the atoms was 2.2A
(in other words they moved apart instead of forming a covalent bond).



Thanks in advance for any further suggestions,


Pavel






-- Původní e-mail --
Od: Eleanor Dodson <176a9d5ebad7-dmarc-requ...@jiscmail.ac.uk>
Komu: CCP4BB@JISCMAIL.AC.UK
Datum: 4. 11. 2019 12:16:38
Předmět: Re: [ccp4bb] why does Coot ignore CONECT?
"

What does refmac do if you feed it the coordinates with side chains close 
enough to bond? In some cases it makes a full link dictionary with bonds 
angles planes etc. But can coot read such a dictionary entry?





On Mon, 4 Nov 2019 at 17:06, Pavel Mader mailto:mader.pa...@seznam.cz)> wrote:

"
Hi Paul,

thank you for your answer. My problem is that I am building a cyclic peptide
with non-standard amino acids, the side chains of which are linked by click
chemistry... I know how to make modified amino acids that will make peptide
bonds with their neighbors in the polypeptide chain, but I don't know how to
make a covalent link between side chains of amino acids say No. 3 and 12 for
example (of a 15 AA long chain). I was trying to solve the issue by making a
CONECT record in the pdb file, but Coot ignored it. LINK "sort of" worked,
but it was not possible to control the geometry (bond length and angles), 
often the real space refinement simply "explodes" probably in a attempt to
avoid clashes. My current workaround is to make a cif file for the whole 15
AA long polypeptide (the bonds and angles now behave more or less as
expected), but I don't consider this as a good general practice for building
long polypeptide chains...

Thanks in advance for any hints guiding me in the right direction.

Pavel
-- Původní e-mail --
Od: Paul Emsley mailto:pems...@mrc-lmb.cam.ac.uk)
>
Komu: CCP4BB@JISCMAIL.AC.UK(mailto:CCP4BB@jiscmail.ac.uk)
Datum: 1. 11. 2019 21:16:11
Předmět: Re: [ccp4bb] why does Coot ignore CONECT?
"On 01/11/2019 20:17, Pavel Mader wrote:
> Hello,

Hello.

>
> I have a question, can anyone explain, why does Coot not display a
covalent bond manually specified by
> CONECT line in a pdb file?

Because I have never thought them necessary. Using SSBOND, LINK and residue
dictionaries seemed to me to
cover the bases for which CONECT would be used.

Paul.

 

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Re: [ccp4bb] why does Coot ignore CONECT?

2019-11-04 Thread Pavel Mader
Hi Paul,

thank you for your answer. My problem is that I am building a cyclic peptide
with non-standard amino acids, the side chains of which are linked by click
chemistry... I know how to make modified amino acids that will make peptide
bonds with their neighbors in the polypeptide chain, but I don't know how to
make a covalent link between side chains of amino acids say No. 3 and 12 for
example (of a 15 AA long chain). I was trying to solve the issue by making a
CONECT record in the pdb file, but Coot ignored it. LINK "sort of" worked,
but it was not possible to control the geometry (bond length and angles), 
often the real space refinement simply "explodes" probably in a attempt to
avoid clashes. My current workaround is to make a cif file for the whole 15
AA long polypeptide (the bonds and angles now behave more or less as
expected), but I don't consider this as a good general practice for building
long polypeptide chains...

Thanks in advance for any hints guiding me in the right direction.

Pavel
-- Původní e-mail --
Od: Paul Emsley 
Komu: CCP4BB@JISCMAIL.AC.UK
Datum: 1. 11. 2019 21:16:11
Předmět: Re: [ccp4bb] why does Coot ignore CONECT?
"On 01/11/2019 20:17, Pavel Mader wrote:
> Hello,

Hello.

>
> I have a question, can anyone explain, why does Coot not display a
covalent bond manually specified by
> CONECT line in a pdb file?

Because I have never thought them necessary. Using SSBOND, LINK and residue
dictionaries seemed to me to
cover the bases for which CONECT would be used.

Paul.

 

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[ccp4bb] why does Coot ignore CONECT?

2019-11-01 Thread Pavel Mader
Hello,



I have a question, can anyone explain, why does Coot not display a covalent
bond manually specified by CONECT line in a pdb file? The same file shows 
the covalent bond if displayed in Pymol.




Thank you in advance,




Pavel



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[ccp4bb] D amino acids in Coot

2019-10-30 Thread Pavel Mader
Hi everyone,



if I load D-Ala (Get monomer DAL) in Coot and superpose (LSQ) it with
regular L-Ala (ALA), the two amino acids look identical to me (not mirror 
images of each other), see attached image. I have the same problem with D-
His. Is this normal, or am I missing something?




Thanks,




Pavel



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