You include unk.itp but show us drg.itp. Perhaps you're looking at or using the wrong file.

/Erik

qing yang skrev:

Dear gmx-users,

I am try to simulate the protein-drug, and have used drg.itp from prodrg server2,5(beta). I have also got pro.top from pdb2gmx programs. But when I issue a grompp command for minimization,grompp gives a fatal error.

The error is:

Error 0 [file "unk.itp",line 4]

Not enough parameters

…..

Fatal error:

Bonded/nonbonded atom type '1' not found!

My pro.top file:

#include “ffg43a1.itp”

#include “unk.itp”

[molecules]

Protein 1

UNK 1

SOL 109324

My drg.itp file:

[ atoms ]
; nr type resnr resid atom cgnr charge mass
1 CR1 1 UNK CBF 1 0.003 12.0110
2 HC 1 UNK HBF 1 0.035 1.0080
...............
[ bonds ]
; ai aj fu c0, c1, ...
1 2 2 0.109 12300000.0 0.109 12300000.0 ; CBF HBF
1 3 2 0.139 10800000.0 0.139 10800000.0 ; CBF CBG
.............
[ pairs ]
; ai aj fu c0, c1, ...
1 6 1 ; CBF NBK
1 9 1 ; CBF CBI
.................
[ angles ]
; ai aj ak fu c0, c1, ...
2 1 3 2 120.0 505.0 120.0 505.0 ; HBF CBF CBG
2 1 13 2 120.0 505.0 120.0 505.0 ; HBF CBF CBE
................
[ dihedrals ]
; ai aj ak al fu c0, c1, m, ...
1 13 3 2 2 0.0 167.4 0.0 167.4 ; imp CBF CBE CBG HBF
3 1 5 4 2 0.0 167.4 0.0 167.4 ; imp CBG CBF CBH HBG

Maybe someone knows what the problem might be?How can I deal with this problem?
Thanks for your help!


--
-----------------------------------------------
Erik Marklund, PhD student
Laboratory of Molecular Biophysics,
Dept. of Cell and Molecular Biology, Uppsala University.
Husargatan 3, Box 596,    75124 Uppsala, Sweden
phone:    +46 18 471 4537        fax: +46 18 511 755
er...@xray.bmc.uu.se    http://xray.bmc.uu.se/molbiophys

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