[gmx-users] amber to gromacs error

Yun Shi yunshi09 at gmail.com
Sun Dec 9 19:07:28 CET 2012


On Sun, Dec 9, 2012 at 9:46 AM, Albert <mailmd2011 at gmail.com> wrote:
> hello:
>
>  I am using the command:
>
> acpype.py -p prmtop -x S13.rst
>
> to convert Amber system into Gromacs system, but it failed when I try to
> generate .tpr file:
>
>
> WARNING 1 [file prmtop_GMX.top, line 19]:
>   Too few parameters on line (source file toppush.c, line 300)
> WARNING 2 [file prmtop_GMX.top, line 22]:
>   Too few parameters on line (source file toppush.c, line 300)
> Generated 820 of the 820 non-bonded parameter combinations
> Generating 1-4 interactions: fudge = 0.5
> Generated 820 of the 820 1-4 parameter combinations
> -------------------------------------------------------
> Program grompp, VERSION 4.5.5
> Source code file: toppush.c, line: 1166
> Fatal error:
> Atomtype 3C not found
> For more information and tips for troubleshooting, please check the GROMACS
> website at http://www.gromacs.org/Documentation/Errors
> -------------------------------------------------------
>
> "This Doesn't Suck, It's a Black Hole !" (K.A. Feenstra)
>
>

Not sure about "too few ...". But it seems you have some atoms with
type "3C" that is not included (defined) in top files.

> My ligand contains both glycam FF and GAFF parameters from Amber. It is
> quite strange when I open the generated .top file because there is even no
> "include "amber99SB.ff/forcefiled.itp" line.... Here is the .top file I got:
>

My resulting .top and .gro files worked well without these "include
..." stuff, and I believe all the atom types and vdw parameters, bond,
angle, and dihedral parameters, as well as atomic charges have already
been included in the resulting .top file.

> ; prmtop_GMX.top created by acpype (Rev: 7234) on Sun Dec  9 18:35:28 2012
>
> [ defaults ]
> ; nbfunc        comb-rule       gen-pairs       fudgeLJ fudgeQQ
> 1               2               yes             0.5     0.8333
>
> [ atomtypes ]
> ;name   bond_type     mass     charge   ptype   sigma epsilon       Amb
>  N3       N3          0.00000  0.00000   A     3.25000e-01 7.11280e-01 ;
> 1.82  0.1700
>  H        H           0.00000  0.00000   A     1.06908e-01 6.56888e-02 ;
> 0.60  0.0157
>  CX       CX          0.00000  0.00000   A     3.39967e-01 4.57730e-01 ;
> 1.91  0.1094
>  HP       HP          0.00000  0.00000   A     1.95998e-01 6.56888e-02 ;
> 1.10  0.0157
>  CT       CT          0.00000  0.00000   A     3.39967e-01 4.57730e-01 ;
> 1.91  0.1094
>  HC       HC          0.00000  0.00000   A     2.64953e-01 6.56888e-02 ;
> 1.49  0.0157
>  C        C           0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  O        O           0.00000  0.00000   A     2.95992e-01 8.78640e-01 ;
> 1.66  0.2100
>  N        N           0.00000  0.00000   A     3.25000e-01 7.11280e-01 ;
> 1.82  0.1700
>  H1       H1          0.00000  0.00000   A     2.47135e-01 6.56888e-02 ;
> 1.39  0.0157
>  3C       3C          0.00000  0.00000   A     3.39967e-01 4.57730e-01 ;
> 1.91  0.1094
>  OH       OH          0.00000  0.00000   A     3.06647e-01 8.80314e-01 ;
> 1.72  0.2104
>  HO       HO          0.00000  0.00000   A     0.00000e+00 0.00000e+00 ;
> 0.00  0.0000
>  2C       2C          0.00000  0.00000   A     3.39967e-01 4.57730e-01 ;
> 1.91  0.1094
>  S        S           0.00000  0.00000   A     3.56359e-01 1.04600e+00 ;
> 2.00  0.2500
>  CA       CA          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  HA       HA          0.00000  0.00000   A     2.59964e-01 6.27600e-02 ;
> 1.46  0.0150
>  CO       CO          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  O2       O2          0.00000  0.00000   A     2.95992e-01 8.78640e-01 ;
> 1.66  0.2100
>  C*       C*          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  CW       CW          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  H4       H4          0.00000  0.00000   A     2.51055e-01 6.27600e-02 ;
> 1.41  0.0150
>  NA       NA          0.00000  0.00000   A     3.25000e-01 7.11280e-01 ;
> 1.82  0.1700
>  CN       CN          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  CB       CB          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  C8       C8          0.00000  0.00000   A     3.39967e-01 4.57730e-01 ;
> 1.91  0.1094
>  CC       CC          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  NB       NB          0.00000  0.00000   A     3.25000e-01 7.11280e-01 ;
> 1.82  0.1700
>  CR       CR          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  H5       H5          0.00000  0.00000   A     2.42146e-01 6.27600e-02 ;
> 1.36  0.0150
>  N2       N2          0.00000  0.00000   A     3.25000e-01 7.11280e-01 ;
> 1.82  0.1700
>  CV       CV          0.00000  0.00000   A     3.39967e-01 3.59824e-01 ;
> 1.91  0.0860
>  SH       SH          0.00000  0.00000   A     3.56359e-01 1.04600e+00 ;
> 2.00  0.2500
>  HS       HS          0.00000  0.00000   A     1.06908e-01 6.56888e-02 ;
> 0.60  0.0157
>  Ho       Ho          0.00000  0.00000   A     3.56359e-02 1.25520e-01 ;
> 0.20  0.0300
>  Oh       Oh          0.00000  0.00000   A     3.06647e-01 8.80314e-01 ;
> 1.72  0.2104
>  Cg       Cg          0.00000  0.00000   A     3.39967e-01 4.57730e-01 ;
> 1.91  0.1094
>  H2       H2          0.00000  0.00000   A     2.29317e-01 6.56888e-02 ;
> 1.29  0.0157
>  Os       Os          0.00000  0.00000   A     3.00001e-01 7.11280e-01 ;
> 1.68  0.1700
>  Na+      Na+         0.00000  0.00000   A     2.43928e-01 3.65846e-01 ;
> 1.37  0.0874
>  OW       OW          0.00000  0.00000   A     3.15075e-01 6.35968e-01 ;
> 1.77  0.1520
>  HW       HW          0.00000  0.00000   A     0.00000e+00 0.00000e+00 ;
> 0.00  0.0000
>
> [ moleculetype ]
> ;name            nrexcl
>  prmtop           3
>
> [ atoms ]
> ;   nr  type  resi  res  atom  cgnr     charge      mass       ; qtot
> bond_type
>      1   N3     1   ALA     N    1     0.141400     14.01000 ; qtot 0.141
>      2    H     1   ALA    H1    2     0.199700      1.00800 ; qtot 0.341
>      3    H     1   ALA    H2    3     0.199700      1.00800 ; qtot 0.541
>      4    H     1   ALA    H3    4     0.199700      1.00800 ; qtot 0.741
> .....
>
>   7925   Cg   512   LIG    C1 7925     0.509001     12.01000 ; qtot -0.685
>   7926   H2   512   LIG    H1 7926     0.000000      1.00800 ; qtot -0.685
>   7927   Cg   512   LIG    C2 7927     0.246000     12.01000 ; qtot -0.439
>   7928   H1   512   LIG    H2 7928     0.000000      1.00800 ; qtot -0.439
>   7929   Oh   512   LIG    O2 7929    -0.713001     16.00000 ; qtot -1.152
>   7930   Ho   512   LIG   H2O 7930     0.437000      1.00800 ; qtot -0.715
> ....
>
> [ bonds ]
> ;   ai     aj funct   r             k
>      1      2   1    1.0100e-01    3.6317e+05 ;      N - H1
>      1      3   1    1.0100e-01    3.6317e+05 ;      N - H2
> ....
>
> [ angles ]
> ;   ai     aj     ak    funct   theta         cth
>      1      5      6      1    1.0950e+02    4.1840e+02 ;      N - CA     -
> HA
>      1      5      7      1    1.1120e+02    6.6944e+02 ;      N - CA     -
> CB
> ....
>
> [ dihedrals ] ; propers
> ; treated as RBs in GROMACS to use combine multiple AMBER torsions per
> quartet
> ;    i      j      k      l   func    C0         C1 C2         C3         C4
> C5
>      1      5      7      8      3    0.65084    1.95253 0.00000   -2.60338
> 0.00000    0.00000 ;      N-    CA-    CB- HB1
>      1      5      7      9      3    0.65084    1.95253 0.00000   -2.60338
> 0.00000    0.00000 ;      N-    CA-    CB- HB2
>      1      5      7     10      3    0.65084    1.95253 0.00000   -2.60338
> 0.00000    0.00000 ;      N-    CA-    CB- HB3
> ....
>
> [ moleculetype ]
>   ; molname       nrexcl
>   NA+             1
>
> [ atoms ]
>   ; id    at type res nr  residu name     at name  cg nr  charge mass
>     1       IP      1          NA+         NA+       1      1 22.9898
>
> [ moleculetype ]
> ; molname       nrexcl ; TIP3P model
>   WAT             2
>
> [ atoms ]
> ;   nr   type  resnr residue  atom   cgnr     charge       mass
>      1     OW      1     WAT     O      1     -0.834   16.00000
>      2     HW      1     WAT    H1      1      0.417    1.00800
>      3     HW      1     WAT    H2      1      0.417    1.00800
>
> #ifdef FLEXIBLE
> [ bonds ]
> ; i j   funct   length  force.c.
> 1   2   1   0.09572   462750.4 0.09572   462750.4
> 1   3   1   0.09572   462750.4 0.09572   462750.4
>
> [ angles ]
> ; i j   k   funct   angle   force.c.
> 2   1   3   1   104.520    836.800  104.520    836.800
> #else
> [ settles ]
> ; i j   funct   length
> 1   1   0.09572 0.15139
>
> [ exclusions ]
> 1   2   3
> 2   1   3
> 3   1   2
> #endif
>
> [ system ]
>  prmtop
>
> [ molecules ]
> ; Compound        nmols
>  prmtop           1
>  NA+              1
>  WAT              16028
> --
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Yun



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