[gmx-users] about details of the topology file.

Mufaddal Soni muffi_gro at yahoo.com
Mon Jan 14 17:44:04 CET 2008


Dear users,
                Thankyou for helping me regarding the topology file of my FNP inhibitor. I am facing one small problem understanding the topology file of my inhibitor. I have copied a part of my topology file.

[ pairs ]
; ai  aj  fu    c0, c1, ...
   1   6   1                                           ;   OP1   F1   
   1   7   1                                           ;   OP1   F2   
   1   8   1                                           ;   OP1   C8   
   2   9   1                                           ;    P1   C9   
   2  24   1                                           ;    P1   C7   
   3   6   1                                           ;   OP2   F1   
   3   7   1                                           ;   OP2   F2   
   3   8   1                                           ;   OP2   C8   
   4   6   1                                           ;   OP3   F1   
   4   7   1                                           ;   OP3   F2   
   4   8   1                                           ;   OP3   C8   
   5  10   1                                           ;    C1  C10   
   5  23   1                                           ;    C1   C6   
   6   9   1                                           ;    F1   C9   
   6  24   1                                           ;    F1   C7   
   7   9   1                                           ;    F2   C9   
   7  24   1                                           ;    F2   C7   
   8  11   1                                           ;    C8  C11   
   8  22   1                                           ;    C8   C5   
   9  12   1                                           ;    C9   C2   
   9  21   1                                           ;    C9   C4   
   9  23   1                                           ;    C9   C6   
  10  13   1                                           ;   C10  C12   
  10  20   1                                           ;   C10   C3   
  10  24   1                                           ;   C10   C7   
  11  14   1                                           ;   C11   F3   
  11  15   1                                           ;   C11   F4   
  11  16   1                                           ;   C11   P2   
  11  21   1                                           ;   C11   C4   
  11  23   1                                           ;   C11   C6   
  12  17   1                                           ;    C2  OP5   
  12  18   1                                           ;    C2  OP6   
  12  19   1                                           ;    C2  OP4   
  12  22   1                                           ;    C2   C5   
  13  21   1                                           ;   C12   C4   
  14  17   1                                           ;    F3  OP5   
  14  18   1                                           ;    F3  OP6   
  14  19   1                                           ;    F3  OP4   
  14  20   1                                           ;    F3   C3   
  15  17   1                                           ;    F4  OP5   
  15  18   1                                           ;    F4  OP6   
  15  19   1                                           ;    F4  OP4   
  15  20   1                                           ;    F4   C3   
  16  20   1                                           ;    P2   C3   
  20  23   1                                           ;    C3   C6   
  21  24   1                                           ;    C4   C7   
what i dont get here is the significance of this pairing cos there are no bonds between these atoms.

[ angles ]
; ai  aj  ak  fu    c0, c1, ...
   1   2   3   1    120.0       585.8    120.0       585.8 ;   OP1   P1  OP2   
   1   2   4   1    120.0       585.8    120.0       585.8 ;   OP1   P1  OP3   
   1   2   5   1    109.6       397.5    109.6       397.5 ;   OP1   P1   C1   
   3   2   4   1    120.0       585.8    120.0       585.8 ;   OP2   P1  OP3   
   3   2   5   1    109.6       397.5    109.6       397.5 ;   OP2   P1   C1   
   4   2   5   1    109.6       397.5    109.6       397.5 ;   OP3   P1   C1   
   2   5   6   1    109.5       397.5    109.5       397.5 ;    P1   C1   F1   
   2   5   7   1    109.5       397.5    109.5       397.5 ;    P1   C1   F2   
   2   5   8   1    109.5       397.5    109.5       397.5 ;    P1   C1   C8   
   6   5   7   1    109.5       397.5    109.5       397.5 ;    F1   C1   F2   
   6   5   8   1    109.5       397.5    109.5       397.5 ;    F1   C1   C8   
   7   5   8   1    109.5       397.5    109.5       397.5 ;    F2   C1   C8   
   5   8   9   1    120.0       418.4    120.0       418.4 ;    C1   C8   C9   
   5   8  24   1    120.0       418.4    120.0       418.4 ;    C1   C8   C7   
   9   8  24   1    120.0       418.4    120.0       418.4 ;    C9   C8   C7   
   8   9  10   1    120.0       418.4    120.0       418.4 ;    C8   C9  C10   
   9  10  11   1    120.0       418.4    120.0       418.4 ;    C9  C10  C11   
   9  10  22   1    120.0       418.4    120.0       418.4 ;    C9  C10   C5   
  11  10  22   1    120.0       418.4    120.0       418.4 ;   C11  C10   C5   
  10  11  12   1    120.0       418.4    120.0       418.4 ;   C10  C11   C2   
  11  12  13   1    120.0       418.4    120.0       418.4 ;   C11   C2  C12   
  11  12  20   1    120.0       418.4    120.0       418.4 ;   C11   C2   C3   
  13  12  20   1    120.0       418.4    120.0       418.4 ;   C12   C2   C3   
  12  13  14   1    109.5       397.5    109.5       397.5 ;    C2  C12   F3   
  12  13  15   1    109.5       397.5    109.5       397.5 ;    C2  C12   F4   
  12  13  16   1    109.5       397.5    109.5       397.5 ;    C2  C12   P2   
  14  13  15   1    109.5       397.5    109.5       397.5 ;    F3  C12   F4   
  14  13  16   1    109.5       397.5    109.5       397.5 ;    F3  C12   P2   
  15  13  16   1    109.5       397.5    109.5       397.5 ;    F4  C12   P2   
  13  16  17   1    109.6       397.5    109.6       397.5 ;   C12   P2  OP5   
  13  16  18   1    109.6       397.5    109.6       397.5 ;   C12   P2  OP6   
  13  16  19   1    109.6       397.5    109.6       397.5 ;   C12   P2  OP4   
  17  16  18   1    120.0       585.8    120.0       585.8 ;   OP5   P2  OP6   
  17  16  19   1    120.0       585.8    120.0       585.8 ;   OP5   P2  OP4   
  18  16  19   1    120.0       585.8    120.0       585.8 ;   OP6   P2  OP4   
  12  20  21   1    120.0       418.4    120.0       418.4 ;    C2   C3   C4   
  20  21  22   1    120.0       418.4    120.0       418.4 ;    C3   C4   C5   
  10  22  21   1    120.0       418.4    120.0       418.4 ;   C10   C5   C4   
  10  22  23   1    120.0       418.4    120.0       418.4 ;   C10   C5   C6   
  21  22  23   1    120.0       418.4    120.0       418.4 ;    C4   C5   C6   
  22  23  24   1    120.0       418.4    120.0       418.4 ;    C5   C6   C7   
   8  24  23   1    120.0       418.4    120.0       418.4 ;    C8   C7   C6   
  25   3   2   1    109.6       397.5    109.6       397.5 
  26   4   2   1    109.6       397.5    109.6       397.5
  27  19  16   1    109.6       397.5    109.6       397.5
  27  18  16   1    109.6       397.5    109.6       397.5
in this the 5th and 7th column i understand are the actual angles, but what do the 6th and 8th columns signify??

[ dihedrals ]
; ai  aj  ak  al  fu    c0, c1, m, ...
   2   1   4   3   2     35.3  836.8       35.3  836.8   ; imp    P1  OP1  OP3  OP2   
   5   2   6   7   2     35.3  836.8       35.3  836.8   ; imp    C1   P1   F1   F2   
   8   5  24   9   2      0.0 1673.6        0.0 1673.6   ; imp    C8   C1   C7   C9   
  10  22  11   9   2      0.0 1673.6        0.0 1673.6   ; imp   C10   C5  C11   C9   
  12  20  13  11   2      0.0 1673.6        0.0 1673.6   ; imp    C2   C3  C12  C11   
  13  12  14  15   2     35.3  836.8       35.3  836.8   ; imp   C12   C2   F3   F4   
  16  13  17  18   2     35.3  836.8       35.3  836.8   ; imp    P2  C12  OP5  OP6   
  22  10  23  21   2      0.0 1673.6        0.0 1673.6   ; imp    C5  C10   C6   C4   
   8   9  10  22   2      0.0 1673.6        0.0 1673.6   ; imp    C8   C9  C10   C5   
   9  10  22  23   2      0.0 1673.6        0.0 1673.6   ; imp    C9  C10   C5   C6   
  10  22  23  24   2      0.0 1673.6        0.0 1673.6   ; imp   C10   C5   C6   C7   
  22  23  24   8   2      0.0 1673.6        0.0 1673.6   ; imp    C5   C6   C7   C8   
  23  24   8   9   2      0.0 1673.6        0.0 1673.6   ; imp    C6   C7   C8   C9   
  24   8   9  10   2      0.0 1673.6        0.0 1673.6   ; imp    C7   C8   C9  C10   
  10  11  12  20   2      0.0 1673.6        0.0 1673.6   ; imp   C10  C11   C2   C3   
  11  12  20  21   2      0.0 1673.6        0.0 1673.6   ; imp   C11   C2   C3   C4   
  12  20  21  22   2      0.0 1673.6        0.0 1673.6   ; imp    C2   C3   C4   C5   
  20  21  22  10   2      0.0 1673.6        0.0 1673.6   ; imp    C3   C4   C5  C10   
  21  22  10  11   2      0.0 1673.6        0.0 1673.6   ; imp    C4   C5  C10  C11   
  22  10  11  12   2      0.0 1673.6        0.0 1673.6   ; imp    C5  C10  C11   C2   
   1   2   5   8   1      0.0    1.0 3      0.0    1.0 3 ; dih   OP1   P1   C1   C8   
   1   2   5   8   1      0.0    3.1 2      0.0    3.1 2 ; dih   OP1   P1   C1   C8   
   2   5   8  24   1      0.0    1.0 3      0.0    1.0 3 ; dih    P1   C1   C8   C7   
   2   5   8  24   1      0.0    3.1 2      0.0    3.1 2 ; dih    P1   C1   C8   C7   
  11  12  13  16   1      0.0    1.0 3      0.0    1.0 3 ; dih   C11   C2  C12   P2   
  11  12  13  16   1      0.0    3.1 2      0.0    3.1 2 ; dih   C11   C2  C12   P2   
  12  13  16  19   1      0.0    1.0 3      0.0    1.0 3 ; dih    C2  C12   P2  OP4   
  12  13  16  19   1      0.0    3.1 2      0.0    3.1 2 ; dih    C2  C12   P2  OP4 


Similarly here the 6th and 8th columns give the values of the dihedrals but i dont understand what the 7th and 9th column signify.

Cheers,
Mufaddal Soni.

       
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