[gmx-users] hydrogen simulation and topology file

vips g vipul_indian at rediffmail.com
Sat Apr 5 19:22:20 CEST 2008


Sir thanx for the reply,     I have a hydrogen.pdb file which I have generated from chem sketch.HETATM 1 H1 HYD 1 -0.353 -0.022  -0.013 1.00 0.00 HHETATM 2 H2 HYD 1  0.353   0.022   0.013 1.00 0.00 HCONECT 1 2CONECT 2 1ENDI am using genboc -ci option to insert 100 hydrogen molecules in the solvated box containing water and protein.Now the topology file "hydrogen.itp" I am using definig hydrogen as a 3 point molecule.
[ moleculetype ]; molname nrexclHYD 2[ atoms ]; nr   type             resnr          residue             atom        cgnr      charge         mass#ifdef _FF_OPLS     1 opls_966           1            HYD                 H1                1        0.475    2 opls_967           1           H
 YD                 H2                1         0.475   3 opls_968           1           HYD                 DH                1        -0.950#endif[dummies2];Dummy from from funct  a     3          1      2        1   0.5
I am confused if the pdb should also contain the dummy atom.Kindly give me a example as the theory in manual is little bit compactThanking youVipul   
[ moleculetype ]; molname nrexclHYD 2[ atoms ]; nr   type             resnr          residue             atom        cgnr      charge         mass#ifdef _FF_OPLS     1 opls_966           1            HYD                 H1                1        0.475    2 opls_967           1           H
 YD                 H2                1         0.475   3 opls_968           1           HYD                 DH                1        -0.950#endif[dummies2];Dummy from from funct  a     3          1      2        1   0.5
I am confused if the pdb should also contain the dummy atom.Kindly give me a example as the theory in manual is little bit compactThanking youVipul   
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