[ccp4bb] Molecular Replacement model preparation
Dear all, I’m doing molecular replacement using Phaser. My protein is predicted to have two domain with a “hinge” linking them. The model sequence identity is 0.27. But the MR result is poor. I’ve tried other programme (Molrep, MrBump, Balbes,,,_.) But no improvement was observed. I think that this is due to the “open” or “closed” conformation around the hinge. I was told that I could place the Z axis along the hinge (http://xray0.princeton.edu/~phil/Facility/Guides/MolecularReplacement.html), could anyone tell me more details about how to do next? Thanks! Lu Zuokun
Re: [ccp4bb] [phenixbb] Calculate average B-factor?
Hi all,
reading this beauty I would like to ask a question to the respective
developers:
Will the PDB format remain the working format for the users and only
upon deposition will it be converted to PDBml for archiving purposes, or
are the refinement programs (et al.) going to abandon PDB, too?
Best,
Tim
On 10/04/2014 10:32 PM, Ed Pozharski wrote:
grep ^ATOM filename.pdb | cut -c 61-66 | awk '{s+=$1;} END {print s/NR;}'
Nobody likes a show off, Private
Skipper
Cheers
Sent on a Sprint Samsung Galaxy S® III
div Original message /divdivFrom: Chen Zhao
c.z...@yale.edu /divdivDate:10/04/2014 4:03 PM (GMT-05:00)
/divdivTo: PHENIX user mailing list pheni...@phenix-online.org
/divdivSubject: [phenixbb] Calculate average B-factor? /divdiv
/divDear all,
I am just wondering whether there is a command line tool in phenix that
calculates the average B-factor of a PDB file? Can it deal with the ANISOU
records (from TLS refinement or not) properly? I looked into previous posts
but the --show-adp-statistics option in phenix.pdbtools seems to be no
longer available in the version (1.9-1678) I installed.
Thank you so much,
Chen
___
phenixbb mailing list
pheni...@phenix-online.org
http://phenix-online.org/mailman/listinfo/phenixbb
--
Dr Tim Gruene
Institut fuer anorganische Chemie
Tammannstr. 4
D-37077 Goettingen
GPG Key ID = A46BEE1A
signature.asc
Description: OpenPGP digital signature
Re: [ccp4bb] [phenixbb] Calculate average B-factor?
Well, if you simply replace that beauty by this one:
grep ^ATOM filename.cif | awk '{print $15}' | awk '{s+=$1;} END {print
s/NR;}'
You will achieve exactly the same result (the b-factors are in the 15th
field of the _atom_site section in deposited mmCIF files). I'm not an
expert in awk, but I'm sure that can be made even shorter ;)
It is important to keep in mind that mmCIF files are designed to be
usable with grep-like tools, so I don't see any problems in moving
forward to that format. Whilst I see a lot of problems in staying with
the classic PDB format.
Cheers
Jose
On 05.10.2014 11:18, Tim Gruene wrote:
Hi all,
reading this beauty I would like to ask a question to the respective
developers:
Will the PDB format remain the working format for the users and only
upon deposition will it be converted to PDBml for archiving purposes, or
are the refinement programs (et al.) going to abandon PDB, too?
Best,
Tim
On 10/04/2014 10:32 PM, Ed Pozharski wrote:
grep ^ATOM filename.pdb | cut -c 61-66 | awk '{s+=$1;} END {print s/NR;}'
Nobody likes a show off, Private
Skipper
Cheers
Sent on a Sprint Samsung Galaxy S® III
div Original message /divdivFrom: Chen Zhao c.z...@yale.edu /divdivDate:10/04/2014 4:03 PM
(GMT-05:00) /divdivTo: PHENIX user mailing list pheni...@phenix-online.org /divdivSubject: [phenixbb] Calculate
average B-factor? /divdiv
/divDear all,
I am just wondering whether there is a command line tool in phenix that
calculates the average B-factor of a PDB file? Can it deal with the ANISOU
records (from TLS refinement or not) properly? I looked into previous posts but
the --show-adp-statistics option in phenix.pdbtools seems to be no longer
available in the version (1.9-1678) I installed.
Thank you so much,
Chen
___
phenixbb mailing list
pheni...@phenix-online.org
http://phenix-online.org/mailman/listinfo/phenixbb
Re: [ccp4bb] [phenixbb] Calculate average B-factor?
mmCIF is a very general format with tag-value pairs, and loops
so that tags do not need to be repeated endlessly. It was
designed so that there is the flexibility of defining new terms
easily and presenting the data in any order and with any kind
of spacing.
I understand that there are 10+ files in cyberspace prepared
by the PDB and that they all have the 'same' format.
It is tempting to write software that treats these files as fixed
format and hope that all software packages that generate coordinate
files will use the same fixed format. But that loses the generality
and flexibility of mmCIF, and software written that way will fail
when some field requires more characters or a new field is added.
There are software tools to allow one to read and extract data from
any mmCIF file; using these is more complicated than using grep but
using these assures that one's software will not fail when it encounters
a date file that is not exactly what the PDB is currently producing.
Note that mmCIf was defined when the limitations of the fixed-format
PDB format became apparent with large structures. Let's not repeat
the mistakes of the past.
Frances
=
Bernstein + Sons
* * Information Systems Consultants
5 Brewster Lane, Bellport, NY 11713-2803
* * ***
*Frances C. Bernstein
* *** f...@bernstein-plus-sons.com
*** *
* *** 1-631-286-1339FAX: 1-631-286-1999
=
On Sun, 5 Oct 2014, Tim Gruene wrote:
Hi Jose,
I see. In the example on page
http://mmcif.wwpdb.org/dictionaries/mmcif_pdbx_v40.dic/Categories/atom_site.html,
it is in field 12, though, and I would have thought that mmCIF allows
line breaks.
But as long as all developers writing PDBx/mmCIF with their programs
follow the PDB constraints (``styling plans'' in their FAQ), everything
is fine.
Cheers,
Tim
On 10/05/2014 01:13 PM, Jose Manuel Duarte wrote:
Well, if you simply replace that beauty by this one:
grep ^ATOM filename.cif | awk '{print $15}' | awk '{s+=$1;} END {print
s/NR;}'
You will achieve exactly the same result (the b-factors are in the 15th
field of the _atom_site section in deposited mmCIF files). I'm not an
expert in awk, but I'm sure that can be made even shorter ;)
It is important to keep in mind that mmCIF files are designed to be
usable with grep-like tools, so I don't see any problems in moving
forward to that format. Whilst I see a lot of problems in staying with
the classic PDB format.
Cheers
Jose
On 05.10.2014 11:18, Tim Gruene wrote:
Hi all,
reading this beauty I would like to ask a question to the respective
developers:
Will the PDB format remain the working format for the users and only
upon deposition will it be converted to PDBml for archiving purposes, or
are the refinement programs (et al.) going to abandon PDB, too?
Best,
Tim
On 10/04/2014 10:32 PM, Ed Pozharski wrote:
grep ^ATOM filename.pdb | cut -c 61-66 | awk '{s+=$1;} END {print
s/NR;}'
Nobody likes a show off, Private
Skipper
Cheers
Sent on a Sprint Samsung Galaxy S? III
div Original message /divdivFrom: Chen Zhao
c.z...@yale.edu /divdivDate:10/04/2014 4:03 PM (GMT-05:00)
/divdivTo: PHENIX user mailing list pheni...@phenix-online.org
/divdivSubject: [phenixbb] Calculate average B-factor? /divdiv
/divDear all,
I am just wondering whether there is a command line tool in phenix
that calculates the average B-factor of a PDB file? Can it deal with
the ANISOU records (from TLS refinement or not) properly? I looked
into previous posts but the --show-adp-statistics option in
phenix.pdbtools seems to be no longer available in the version
(1.9-1678) I installed.
Thank you so much,
Chen
___
phenixbb mailing list
pheni...@phenix-online.org
http://phenix-online.org/mailman/listinfo/phenixbb
--
Dr Tim Gruene
Institut fuer anorganische Chemie
Tammannstr. 4
D-37077 Goettingen
GPG Key ID = A46BEE1A
Re: [ccp4bb] Molecular Replacement model preparation
Since there is a hinge, you could try searching with the two domains separately. On 10/05/14 03:34, Luzuokun wrote: Dear all, I’m doing molecular replacement using Phaser. My protein is predicted to have two domain with a “hinge” linking them. The model sequence identity is 0.27. But the MR result is poor. I’ve tried other programme (Molrep, MrBump, Balbes,,,_.) But no improvement was observed. I think that this is due to the “open” or “closed” conformation around the hinge. I was told that I could place the Z axis along the hinge (http://xray0.princeton.edu/~phil/Facility/Guides/MolecularReplacement.html http://xray0.princeton.edu/%7Ephil/Facility/Guides/MolecularReplacement.html), could anyone tell me more details about how to do next? Thanks! Lu Zuokun -- === All Things Serve the Beam === David J. Schuller modern man in a post-modern world MacCHESS, Cornell University schul...@cornell.edu
Re: [ccp4bb] [phenixbb] Calculate average B-factor?
On Sun, 5 Oct 2014 13:13:14 +0200, Jose Manuel Duarte jose.dua...@psi.ch
wrote:
Well, if you simply replace that beauty by this one:
grep ^ATOM filename.cif | awk '{print $15}' | awk '{s+=$1;} END {print
s/NR;}'
the problem with this is that it will break if there is any B-factor of 100 or
higher, because then the blank will be missing ...
Kay
You will achieve exactly the same result (the b-factors are in the 15th
field of the _atom_site section in deposited mmCIF files). I'm not an
expert in awk, but I'm sure that can be made even shorter ;)
It is important to keep in mind that mmCIF files are designed to be
usable with grep-like tools, so I don't see any problems in moving
forward to that format. Whilst I see a lot of problems in staying with
the classic PDB format.
Cheers
Jose
On 05.10.2014 11:18, Tim Gruene wrote:
Hi all,
reading this beauty I would like to ask a question to the respective
developers:
Will the PDB format remain the working format for the users and only
upon deposition will it be converted to PDBml for archiving purposes, or
are the refinement programs (et al.) going to abandon PDB, too?
Best,
Tim
On 10/04/2014 10:32 PM, Ed Pozharski wrote:
grep ^ATOM filename.pdb | cut -c 61-66 | awk '{s+=$1;} END {print
s/NR;}'
Nobody likes a show off, Private
Skipper
Cheers
Sent on a Sprint Samsung Galaxy S� III
div Original message /divdivFrom: Chen Zhao
c.z...@yale.edu /divdivDate:10/04/2014 4:03 PM (GMT-05:00)
/divdivTo: PHENIX user mailing list pheni...@phenix-online.org
/divdivSubject: [phenixbb] Calculate average B-factor? /divdiv
/divDear all,
I am just wondering whether there is a command line tool in phenix that
calculates the average B-factor of a PDB file? Can it deal with the ANISOU
records (from TLS refinement or not) properly? I looked into previous posts
but the --show-adp-statistics option in phenix.pdbtools seems to be no
longer available in the version (1.9-1678) I installed.
Thank you so much,
Chen
___
phenixbb mailing list
pheni...@phenix-online.org
http://phenix-online.org/mailman/listinfo/phenixbb
Re: [ccp4bb] [phenixbb] Calculate average B-factor?
On Sun, 5 Oct 2014 18:54:16 +0100, Kay Diederichs
kay.diederi...@uni-konstanz.de wrote:
grep ^ATOM filename.cif | awk '{print $15}' | awk '{s+=$1;} END {print
s/NR;}'
the problem with this is that it will break if there is any B-factor of 100 or
higher, because then the blank will be missing ...
sorry, I didn't read properly - this would break with PDB files, but the
message was about CIF files - I didn't check their format.
Kay
Re: [ccp4bb] [phenixbb] Calculate average B-factor?
Thanks Frances for the explanation. Indeed mmCIF format is a lot more
complicated and grep can be a dangerous tool to use with them. But for
most cases it can do the job and thus it maintains some sort of
backwards compatibility. I can't agree more that using specialised tools
(for either PDB files or mmCIF files) that deal with the formats
properly is the best solution (see for instance
http://mmcif.wwpdb.org/docs/software-resources.html for some of the
mmCIF readers).
In any case I find it most surprising that this topic came yet again to
this BB, when it was thoroughly discussed last year in this thread:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind1308L=ccp4bbD=0P=26939
I'm not sure why this kind of urban legends on the evilness of the mmCIF
format keep coming back to the list...
As explained there and elsewhere endless times, the PDB format is
inadequate to represent the complexity of macromolecules and has been
needing a replacement for a long time. The decision to move on to mmCIF
has been made and in my opinion the sooner we move forward the better.
Cheers
Jose
On 05.10.2014 15:52, Frances C. Bernstein wrote:
mmCIF is a very general format with tag-value pairs, and loops
so that tags do not need to be repeated endlessly. It was
designed so that there is the flexibility of defining new terms
easily and presenting the data in any order and with any kind
of spacing.
I understand that there are 10+ files in cyberspace prepared
by the PDB and that they all have the 'same' format.
It is tempting to write software that treats these files as fixed
format and hope that all software packages that generate coordinate
files will use the same fixed format. But that loses the generality
and flexibility of mmCIF, and software written that way will fail
when some field requires more characters or a new field is added.
There are software tools to allow one to read and extract data from
any mmCIF file; using these is more complicated than using grep but
using these assures that one's software will not fail when it encounters
a date file that is not exactly what the PDB is currently producing.
Note that mmCIf was defined when the limitations of the fixed-format
PDB format became apparent with large structures. Let's not repeat
the mistakes of the past.
Frances
=
Bernstein + Sons
* * Information Systems Consultants
5 Brewster Lane, Bellport, NY 11713-2803
* * ***
*Frances C. Bernstein
* *** f...@bernstein-plus-sons.com
*** *
* *** 1-631-286-1339FAX: 1-631-286-1999
=
On Sun, 5 Oct 2014, Tim Gruene wrote:
Hi Jose,
I see. In the example on page
http://mmcif.wwpdb.org/dictionaries/mmcif_pdbx_v40.dic/Categories/atom_site.html,
it is in field 12, though, and I would have thought that mmCIF allows
line breaks.
But as long as all developers writing PDBx/mmCIF with their programs
follow the PDB constraints (``styling plans'' in their FAQ), everything
is fine.
Cheers,
Tim
On 10/05/2014 01:13 PM, Jose Manuel Duarte wrote:
Well, if you simply replace that beauty by this one:
grep ^ATOM filename.cif | awk '{print $15}' | awk '{s+=$1;} END
{print
s/NR;}'
You will achieve exactly the same result (the b-factors are in the 15th
field of the _atom_site section in deposited mmCIF files). I'm not an
expert in awk, but I'm sure that can be made even shorter ;)
It is important to keep in mind that mmCIF files are designed to be
usable with grep-like tools, so I don't see any problems in moving
forward to that format. Whilst I see a lot of problems in staying with
the classic PDB format.
Cheers
Jose
On 05.10.2014 11:18, Tim Gruene wrote:
Hi all,
reading this beauty I would like to ask a question to the respective
developers:
Will the PDB format remain the working format for the users and only
upon deposition will it be converted to PDBml for archiving
purposes, or
are the refinement programs (et al.) going to abandon PDB, too?
Best,
Tim
On 10/04/2014 10:32 PM, Ed Pozharski wrote:
grep ^ATOM filename.pdb | cut -c 61-66 | awk '{s+=$1;} END {print
s/NR;}'
Nobody likes a show off, Private
Skipper
Cheers
Sent on a Sprint Samsung Galaxy S? III
div Original message /divdivFrom: Chen Zhao
c.z...@yale.edu /divdivDate:10/04/2014 4:03 PM (GMT-05:00)
/divdivTo: PHENIX user mailing list pheni...@phenix-online.org
/divdivSubject: [phenixbb] Calculate average B-factor?
/divdiv
/divDear all,
I am just wondering whether there is a command line tool in phenix
that calculates the average B-factor of a PDB file? Can it deal with
the ANISOU records (from TLS refinement or not) properly? I looked
into previous posts but the --show-adp-statistics option in
phenix.pdbtools seems to be no longer available in the
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