the problem on segment a ligand in NAMD ?

From: yxiong_at_mail.ccnu.edu.cn
Date: Thu Nov 27 2003 - 21:53:42 CST

Dear sir,
  I want to generate pdb and psf file for an enzyme and a ligand. However I get
the following error information:
------------------------------------------------
% segment lig {pdb lig1.pdb}
building segment LIG
reading residues from pdb file lig1.pdb
extracted 0 residues from pdb file
Info: generating structure...
Info: segment complete.
------------------------------------------------
My lig1.pdb is as follows:
---------------------------------------------
HETATM 1 CG EBP 1 50.005 -9.192 29.754 1.00 0.10 C
HETATM 2 CB EBP 1 48.762 -8.865 28.953 1.00 0.08 C
HETATM 3 HB1 EBP 1 47.917 -9.487 29.236 1.00 0.29 H
HETATM 4 HB2 EBP 1 48.923 -8.901 27.880 1.00 0.29 H
HETATM 5 P1 EBP 1 48.245 -7.381 29.251 1.00 0.48 P
HETATM 6 O3 EBP 1 48.250 -6.595 27.988 1.00 -0.21 O
HETATM 7 O1 EBP 1 49.211 -6.725 30.341 1.00 -0.28 O
HETATM 8 C1 EBP 1 49.448 -7.216 31.667 1.00 0.06 C
HETATM 9 H11 EBP 1 49.872 -8.233 31.627 1.00 0.06 H
HETATM 10 H12 EBP 1 50.161 -6.552 32.182 1.00 0.06 H
HETATM 11 C3 EBP 1 48.099 -7.236 32.423 1.00 -0.04 C
HETATM 12 H31 EBP 1 48.240 -7.600 33.453 1.00 0.03 H
HETATM 13 H32 EBP 1 47.675 -6.220 32.459 1.00 0.03 H
HETATM 14 H33 EBP 1 47.389 -7.898 31.904 1.00 0.03 H
HETATM 15 O2 EBP 1 46.761 -7.499 29.833 1.00 -0.28 O
HETATM 16 C2 EBP 1 45.644 -8.085 29.148 1.00 0.06 C
HETATM 17 H21 EBP 1 45.490 -7.513 28.219 1.00 0.06 H
HETATM 18 H22 EBP 1 44.737 -7.992 29.769 1.00 0.06 H
HETATM 19 C4 EBP 1 45.910 -9.571 28.806 1.00 -0.04 C
HETATM 20 H41 EBP 1 46.807 -9.670 28.176 1.00 0.03 H
HETATM 21 H42 EBP 1 46.070 -10.151 29.729 1.00 0.03 H
HETATM 22 H43 EBP 1 45.048 -9.992 28.266 1.00 0.03 H
HETATM 23 CD1 EBP 1 50.168 -10.464 30.314 1.00 -0.01 C
HETATM 24 HD1 EBP 1 49.404 -11.225 30.185 1.00 0.07 H
HETATM 25 CE1 EBP 1 51.315 -10.771 31.052 1.00 -0.06 C
HETATM 26 HE1 EBP 1 51.427 -11.762 31.481 1.00 0.06 H
HETATM 27 CZ EBP 1 52.312 -9.809 31.242 1.00 -0.05 C
HETATM 28 C5 EBP 1 53.577 -10.150 32.040 1.00 -0.04 C
HETATM 29 H51 EBP 1 53.794 -11.222 31.921 1.00 0.03 H
HETATM 30 H52 EBP 1 54.438 -9.568 31.680 1.00 0.03 H
HETATM 31 H53 EBP 1 53.437 -9.931 33.110 1.00 0.03 H
HETATM 32 CE2 EBP 1 52.143 -8.533 30.696 1.00 -0.06 C
HETATM 33 HE2 EBP 1 52.904 -7.772 30.848 1.00 0.06 H
HETATM 34 CD2 EBP 1 50.998 -8.226 29.956 1.00 -0.01 C
HETATM 35 HD2 EBP 1 50.890 -7.227 29.544 1.00 0.07 H
CONECT 1 2 23 34
CONECT 2 1 3 4 5
CONECT 3 2
CONECT 4 2
CONECT 5 2 6 7 15
CONECT 6 5
CONECT 7 5 8
CONECT 8 7 9 10 11
CONECT 9 8
CONECT 10 8
CONECT 11 8 12 13 14
CONECT 12 11
CONECT 13 11
CONECT 14 11
CONECT 15 5 16
CONECT 16 15 17 18 19
CONECT 17 16
CONECT 18 16
CONECT 19 16 20 21 22
CONECT 20 19
CONECT 21 19
CONECT 22 19
CONECT 23 1 24 25
CONECT 24 23
CONECT 25 23 26 27
CONECT 26 25
CONECT 27 25 28 32
CONECT 28 27 29 30 31
CONECT 29 28
CONECT 30 28
CONECT 31 28
CONECT 32 27 33 34
CONECT 33 32
CONECT 34 1 32 35
CONECT 35 34
MASTER 0 0 0 0 0 0 0 0 35 0 35 0
END
------------------------------------------------
 I have generate the topology for this ligand. I named this ligand as residue
"EBP". Why did the "segment command" extract 0 residues from pdb file? I have
signe this ligand as "EBP", why can the command not recognize it?

   I am looking forward to your suggestion!

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