Many thanks

rewiting the script to ensure
targetSerial > sourceSerial


fixed the display (all 25 het sets)

Phil

Robert Hanson wrote:
> Phil, you are in luck. It's a simple problem. The PDB specification 
> requires that you specify each connection twice.
>
> http://www.wwpdb.org/documentation/format32/sect10.html
>
> "The connectivity list given here is redundant in that each bond 
> indicated is given twice, once with each of the two atoms involved 
> specified in columns 7 - 11."
>
> Jmol has this in its code:
>
>       if (targetSerial < sourceSerial)
>         continue;
>
> so as not to duplicate connections. That's your problem. You are just 
> missing those redundancies.
>
> Jmol disregards some of the other nuances of the CONECT command (such 
> as the required order) but does not disregard this one.
>
>
> I think Jmol is generally ignoring your CONECT records and instead 
> using its autobond features -- I have to think about why that would be 
> the case. This can differ depending upon the protein and how many 
> connections there are, thus the difference between with and without 
> the protein.
>
> There could  be some other issue, but I think if you fix that CONECT 
> problem all should be fine. At least run a test with the added lines
>
> CONECT 5548 5549
> CONECT 5545 5548
> CONECT 5549 5551
> CONECT 5554 5555
> CONECT 5552 5554
> CONECT 5550 5552
> CONECT 5549 5550
>
> All of those bonds should be missing currently, not just the two you 
> mentioned.
>
> As far as Jmol is concerned, all you really need to make sure is that 
> the number in the first field is smaller than the numbers in the other 
> fields; but it's still an invalid PDB file if you do not duplicate the 
> connections, and some programs may not read it. I don't know.
>
> Bob
>
> On Tue, Oct 13, 2009 at 5:44 AM, Phil Cunningham 
> <[email protected] <mailto:[email protected]>> wrote:
>
>     I have a problem with CONECT records and Jmol
>
>     I am using Autodock (Scripts) to dock retinoic acid on a protein
>     and generate 25 docking positions.  Autodock seems loath to recognise
>     connectivity! - so I add to
>     the docked HETATM the required CONECT records. I use a perl script.
>     I use the same script on the 25 HETATMs and generate a pdb file which
>     contains the PROTEIN as chain A and the 25 Retinoic acid positions as
>     HETATM + CONECT records
>
>     Each atom is uniquely numbered(cols 1-6)
>     Each Retinoic Acis is identified uniquely by chain(col 6) and residue
>     name(cols 18-20)
>     The CONECT records are generated from the atom numbers
>
>
>     When I view the protein - retinoic acid 'complex' SOME of the
>     retinoic acids
>     have 'lost' their conectivity! (tho not all retinoic acids - 13/25
>     display as required)
>
>     Even more confusing to me is the observation that when I  display
>     one of
>     the 'bad' retinoic acids
>     as a simple 'PDB' file (No protein - just the 1 Retinoic acid
>     molecule)
>     the connectivity is fine!
>
>
>     Can some one elucidate the rules Jmol uses to display the CONECT
>     records
>     in the 'correct' manner svp
>
>     yours etc
>     below is a HET set that is fine alone but looses  C7-C8 and C6-C7
>     connectivity when viewed in the complex
>     of Protein and 25 Retinoic acids
>     HETATM 5545  C8  D03 D           4.302 -14.703  33.035
>     HETATM 5546  C9  D03 D           4.962 -15.735  32.295
>     HETATM 5547  C19 D03 D           4.899 -17.196  32.590
>     HETATM 5548  C7  D03 D           3.747 -15.066  34.309
>     HETATM 5549  C6  D03 D           2.441 -14.585  34.670
>     HETATM 5550  C5  D03 D           2.207 -13.243  35.023
>     HETATM 5551  C1  D03 D           1.428 -15.698  34.708
>     HETATM 5552  C4  D03 D           0.828 -12.750  35.250
>     HETATM 5553  C18 D03 D           3.283 -12.231  35.143
>     HETATM 5554  C3  D03 D          -0.096 -13.887  35.602
>     HETATM 5555  C2  D03 D           0.025 -15.087  34.687
>     HETATM 5556  C17 D03 D           1.678 -16.512  35.974
>     HETATM 5557  C16 D03 D           1.659 -16.655  33.543
>     HETATM 5558  C10 D03 D           5.750 -15.266  31.201
>     HETATM 5559  C11 D03 D           5.117 -15.075  29.951
>     HETATM 5560  C12 D03 D           6.060 -14.635  28.932
>     HETATM 5561  C13 D03 D           6.460 -15.569  27.907
>     HETATM 5562  C14 D03 D           5.882 -15.308  26.654
>     HETATM 5563  C20 D03 D           7.399 -16.716  28.119
>     HETATM 5564  C15 D03 D           6.175 -16.168  25.517
>     HETATM 5565  O2  D03 D           7.117 -15.827  24.778
>     HETATM 5566  O1  D03 D           5.454 -17.168  25.244
>     CONECT 5551 5555 5549 5557 5556
>     CONECT 5555 5554
>     CONECT 5554 5552
>     CONECT 5552 5550
>     CONECT 5550 5549 5553
>     CONECT 5549 5548
>     CONECT 5548 5545
>     CONECT 5545 5546
>     CONECT 5546 5558 5547
>     CONECT 5558 5559
>     CONECT 5559 5560
>     CONECT 5560 5561
>     CONECT 5561 5562 5563
>     CONECT 5562 5564
>     CONECT 5564 5565
>
>     --
>     Phil Cunningham
>     Senior Bioinformatics Officer
>     Room 3.157 Franklin Wilkins Building
>     Department of Biochemistry
>     King's College University of London
>     150 Stanford Street
>     London SE1 9NH
>
>     tel 020 7848 4239
>     fax 020 7848 4500
>
>     email [email protected] <mailto:[email protected]>
>
>
>     
> ------------------------------------------------------------------------------
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>
>
> -- 
> Robert M. Hanson
> Professor of Chemistry
> St. Olaf College
> 1520 St. Olaf Ave.
> Northfield, MN 55057
> http://www.stolaf.edu/people/hansonr
> phone: 507-786-3107
>
>
> If nature does not answer first what we want,
> it is better to take what answer we get.
>
> -- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900

-- 
Phil Cunningham
Senior Bioinformatics Officer
Room 3.157 Franklin Wilkins Building
Department of Biochemistry
King's College University of London
150 Stanford Street
London SE1 9NH

tel 020 7848 4239
fax 020 7848 4500

email [email protected]


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