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]


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