Contacts of the helix formed by residues 91 - 118 (chain C) in PDB entry 5MJ3


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with SER 91 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72C  MET*     5.6     1.1    -      -       -      -
     89C  GLY      4.1     0.2    +      -       -      -
     90C  MET*     1.3    73.0    -      -       -      +
     92C  ILE*     1.3    59.6    +      -       -      +
     93C  GLU*     3.6     8.0    +      -       -      +
     94C  GLU*     2.9    38.6    +      -       -      +
     95C  ILE*     2.9    33.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 92 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2C  MET      3.8    14.1    -      -       -      +
      4C  ILE*     3.2    33.4    -      -       +      -
      7C  ILE*     3.7    16.6    -      -       +      -
     72C  MET*     3.3    26.4    -      -       +      -
     91C  SER*     1.3    72.3    -      -       -      +
     93C  GLU*     1.3    65.1    +      -       -      +
     95C  ILE*     2.9     9.2    +      -       +      +
     96C  GLN*     2.8    42.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 93 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91C  SER*     3.3     7.9    +      -       -      +
     92C  ILE*     1.3    78.3    -      -       -      +
     94C  GLU*     1.3    59.1    +      -       +      +
     96C  GLN*     3.2    14.8    +      -       -      +
     97C  LYS*     2.9    36.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 94 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88C  SER*     5.5     0.3    +      -       -      -
     89C  GLY      3.8     6.3    -      -       -      +
     90C  MET*     3.3    28.2    -      -       +      +
     91C  SER*     2.9    37.8    +      -       -      +
     92C  ILE      3.1     0.6    -      -       -      -
     93C  GLU*     1.3    74.3    -      -       +      +
     95C  ILE*     1.3    60.4    +      -       -      +
     97C  LYS*     3.4    13.1    +      -       +      +
     98C  GLN*     3.0    23.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 95 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  ILE*     4.0    28.7    -      -       +      -
     65C  ILE*     4.3    17.9    -      -       +      +
     68C  GLN*     4.2    17.3    -      -       +      -
     69C  ILE*     3.9    20.2    -      -       +      -
     72C  MET*     4.6    14.4    -      -       +      -
     90C  MET*     3.8    27.1    -      -       +      +
     91C  SER      2.9    22.7    +      -       -      +
     92C  ILE*     3.3    12.6    -      -       +      +
     94C  GLU*     1.3    74.2    -      -       -      +
     96C  GLN*     1.3    65.9    +      -       -      +
     98C  GLN*     3.1     3.2    +      -       -      +
     99C  ILE*     2.9    30.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 96 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2C  MET*     3.1    58.8    +      -       +      +
      7C  ILE*     4.0    18.6    -      -       +      -
     10C  GLU*     5.3     2.2    -      -       -      +
     92C  ILE*     2.8    29.8    +      -       -      +
     93C  GLU*     3.6    11.9    -      -       -      +
     95C  ILE*     1.3    72.5    -      -       -      +
     97C  LYS*     1.3    62.7    +      -       +      +
     99C  ILE*     3.3    10.0    +      -       -      +
    100C  ALA*     3.1    22.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 97 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93C  GLU*     2.9    24.7    +      -       +      +
     94C  GLU*     3.7    12.1    -      -       +      +
     96C  GLN*     1.3    76.7    -      -       +      +
     98C  GLN*     1.3    62.8    +      -       -      +
    100C  ALA*     3.4     8.0    +      -       -      +
    101C  ALA*     3.1    21.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 98 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61C  GLN*     2.8    33.3    +      -       -      +
     65C  ILE*     3.9    18.6    -      -       +      -
     90C  MET*     4.0    15.8    -      -       +      +
     94C  GLU      3.0    17.4    +      -       -      +
     95C  ILE      3.7     3.6    -      -       -      +
     97C  LYS*     1.3    74.3    -      -       -      +
     99C  ILE*     1.3    60.5    +      -       -      +
    101C  ALA*     3.2    13.0    +      -       -      +
    102C  ILE*     2.8    34.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 99 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  ILE*     3.9    27.8    -      -       +      +
     10C  GLU*     3.9    29.6    -      -       +      +
     11C  ILE*     4.0    20.0    -      -       +      -
     14C  ILE*     3.6    21.7    -      -       +      +
     62C  ILE*     6.0     1.1    -      -       +      -
     65C  ILE*     5.5     5.6    -      -       +      -
     95C  ILE*     2.9    25.8    +      -       +      +
     96C  GLN*     3.6     9.6    -      -       -      +
     97C  LYS      3.3     0.2    -      -       -      -
     98C  GLN*     1.3    76.4    -      -       +      +
    100C  ALA*     1.3    57.8    +      -       -      +
    102C  ILE*     3.2    12.4    +      -       +      +
    103C  GLN*     2.8    43.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 100 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96C  GLN      3.1    13.1    +      -       -      +
     97C  LYS*     3.6    11.0    -      -       -      +
     98C  GLN      3.3     0.2    -      -       -      -
     99C  ILE*     1.3    76.4    -      -       -      +
    101C  ALA*     1.3    63.1    +      -       -      +
    103C  GLN*     3.2    18.1    +      -       -      +
    104C  GLU*     3.1    26.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 101 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97C  LYS      3.1    14.1    +      -       -      +
     98C  GLN*     3.5    21.5    -      -       -      +
     99C  ILE      3.2     0.4    -      -       -      -
    100C  ALA*     1.3    77.2    -      -       -      +
    102C  ILE*     1.3    61.4    +      -       -      +
    104C  GLU*     3.2     9.5    +      -       -      +
    105C  GLN*     3.1    29.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 102 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  ILE*     4.0    15.5    -      -       +      -
     58C  ILE*     3.6    31.4    -      -       +      -
     61C  GLN*     3.8    21.8    -      -       +      +
     62C  ILE*     3.9    15.0    -      -       +      -
     65C  ILE*     3.6    30.3    -      -       +      -
     98C  GLN*     2.8    24.1    +      -       +      +
     99C  ILE*     3.2     8.5    +      -       +      +
    101C  ALA*     1.3    73.2    -      -       -      +
    103C  GLN*     1.3    66.9    +      -       -      +
    105C  GLN*     3.2     9.0    +      -       +      +
    106C  ILE*     2.9    33.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 103 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156B  TRP*     3.4    66.2    -      -       +      +
     10C  GLU*     4.4    16.4    +      -       -      +
     14C  ILE*     4.1    11.6    -      -       +      +
     99C  ILE*     2.8    31.9    +      -       -      +
    100C  ALA*     3.2    18.7    +      -       -      +
    102C  ILE*     1.3    77.0    -      -       -      +
    104C  GLU*     1.3    57.8    +      -       +      +
    106C  ILE*     3.3     3.9    +      -       -      +
    107C  LEU*     2.9    35.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 104 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155B  PRO*     6.0     1.0    -      -       -      +
    100C  ALA*     3.1    19.3    +      -       +      +
    101C  ALA*     3.2    10.7    +      -       -      +
    103C  GLN*     1.3    78.5    -      -       -      +
    105C  GLN*     1.3    65.3    +      -       +      +
    107C  LEU*     3.3    21.4    +      -       -      +
    108C  ALA*     3.0    24.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 105 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54C  GLN*     5.2     5.2    -      -       -      +
     58C  ILE*     4.1    18.2    -      -       +      -
    101C  ALA*     3.1    19.6    +      -       +      +
    102C  ILE*     3.2     9.8    +      -       +      +
    104C  GLU*     1.3    78.1    -      -       -      +
    106C  ILE*     1.3    63.5    +      -       -      +
    108C  ALA*     3.4     9.0    +      -       -      +
    109C  ILE*     3.0    30.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 106 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156B  TRP*     3.8    27.4    -      -       +      -
    159B  LEU*     4.8     3.4    -      -       +      -
     14C  ILE*     3.5    23.8    -      -       +      +
     17C  VAL*     4.0     7.2    -      -       +      -
     18C  ILE*     3.2    31.4    -      -       +      +
     21C  ILE*     3.9    25.3    -      -       +      +
     58C  ILE*     4.3    10.5    -      -       +      -
    102C  ILE*     2.9    26.4    +      -       +      +
    103C  GLN*     3.6     4.5    -      -       -      +
    105C  GLN*     1.3    76.5    -      -       -      +
    107C  LEU*     1.3    59.7    +      -       -      +
    109C  ILE*     3.3     9.0    +      -       +      +
    110C  TYR*     2.8    27.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 107 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    113B  PRO*     4.0    26.2    -      -       +      -
    155B  PRO*     4.1    28.9    -      -       +      +
    156B  TRP*     4.1    19.3    -      -       +      +
    159B  LEU*     3.9    24.7    -      -       +      -
    103C  GLN*     2.9    22.3    +      -       +      +
    104C  GLU*     3.7    28.0    -      -       -      +
    105C  GLN      3.3     0.2    -      -       -      -
    106C  ILE*     1.3    77.0    -      -       -      +
    108C  ALA*     1.3    56.5    +      -       -      +
    110C  TYR*     3.6     5.0    -      -       +      +
    111C  LYS*     2.9    41.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 108 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104C  GLU      3.0    15.9    +      -       -      +
    105C  GLN*     3.6    10.3    -      -       -      +
    107C  LEU*     1.3    76.8    -      -       -      +
    109C  ILE*     1.3    62.6    +      -       +      +
    111C  LYS*     3.4    14.4    +      -       -      +
    112C  GLN*     3.0    29.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 109 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21C  ILE*     4.3     9.2    -      -       +      -
     51C  ILE*     3.7    28.0    -      -       +      +
     54C  GLN*     3.8    33.9    -      -       +      +
     55C  ILE*     4.2    20.4    -      -       +      -
     58C  ILE*     3.7    26.9    -      -       +      -
    105C  GLN*     3.0    17.6    +      -       +      +
    106C  ILE*     3.6     8.5    -      -       +      +
    108C  ALA*     1.3    72.4    -      -       +      +
    110C  TYR*     1.3    68.2    +      -       -      +
    112C  GLN*     3.1    11.7    +      -       -      +
    113C  ILE*     2.9    27.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 110 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48B  HIS*     2.8    37.3    +      +       -      -
     49B  PRO*     4.6     6.5    -      -       +      -
    113B  PRO*     3.7    25.6    -      -       +      -
    115B  LEU*     3.7     8.6    -      -       +      +
    159B  LEU*     3.4    29.8    -      -       +      -
    162B  ARG*     2.9    29.7    +      -       -      -
    163B  PHE*     5.7     0.7    -      +       -      -
     21C  ILE*     4.4    21.9    -      -       +      +
    106C  ILE      2.8    21.0    +      -       -      +
    107C  LEU*     3.6     6.1    -      -       +      +
    109C  ILE*     1.3    73.6    -      -       -      +
    111C  LYS*     1.3    60.5    +      -       +      +
    113C  ILE*     3.2     7.2    +      -       +      +
    114C  MET*     2.8    57.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 111 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  GLU*     2.9    32.0    +      -       -      +
    113B  PRO*     3.6    25.6    -      -       +      -
    114B  SER      5.1     2.9    -      -       -      +
    107C  LEU*     2.9    26.3    +      -       -      +
    108C  ALA*     3.7    13.2    -      -       -      +
    110C  TYR*     1.3    77.3    -      -       +      +
    112C  GLN*     1.3    62.5    +      -       +      +
    114C  MET*     3.5     4.9    +      -       -      +
    115C  ALA*     3.0    25.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 112 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  MET      5.4     7.6    +      -       -      +
     51C  ILE*     3.5    29.9    -      -       +      +
     54C  GLN*     5.1     8.3    +      -       -      +
    108C  ALA*     3.0    20.1    +      -       +      +
    109C  ILE*     3.1    12.7    +      -       -      +
    111C  LYS*     1.3    76.6    -      -       -      +
    113C  ILE*     1.3    62.7    +      -       -      +
    115C  ALA*     3.3     7.4    +      -       -      +
    116C  MET*     3.0    28.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 113 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49B  PRO*     5.9     0.2    -      -       +      -
     21C  ILE*     4.8     6.7    -      -       +      -
     24C  TYR*     3.7    33.0    -      -       +      -
     25C  ILE*     3.9    26.9    -      -       +      -
     28C  MET*     3.8    16.2    -      -       +      -
     48C  ILE*     6.1     1.1    -      -       +      -
     51C  ILE*     3.7    28.7    -      -       +      -
    109C  ILE*     2.9    31.8    +      -       +      +
    110C  TYR*     3.7     4.9    -      -       -      +
    112C  GLN*     1.3    72.4    -      -       -      +
    114C  MET*     1.3    71.9    +      -       +      +
    116C  MET*     3.0    22.6    +      -       +      +
    117C  VAL*     3.1    13.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 114 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  ALA      5.0     4.7    -      -       -      +
     48B  HIS*     4.6     7.2    -      -       -      -
     49B  PRO*     3.8    19.7    -      -       +      -
    114B  SER      5.3     2.7    -      -       -      +
    115B  LEU*     3.5    33.7    -      -       +      -
    119B  SER*     5.9     2.7    -      -       -      -
    120B  PRO*     5.7     3.4    -      -       -      -
    121B  VAL*     5.8     2.0    -      -       -      -
     24C  TYR*     3.7    34.1    -      -       +      +
    110C  TYR*     2.8    41.1    +      -       +      +
    111C  LYS*     3.9     5.6    -      -       -      +
    113C  ILE*     1.3    82.2    -      -       +      +
    115C  ALA*     1.3    57.5    +      -       -      +
    117C  VAL*     3.4    10.5    +      -       +      +
    118C  THR*     2.7    34.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 115 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     6.5     0.7    -      -       -      -
    111C  LYS      3.0    18.1    +      -       -      +
    112C  GLN*     3.6     6.3    -      -       -      +
    114C  MET*     1.3    77.6    -      -       -      +
    116C  MET*     1.3    62.8    +      -       +      +
    118C  THR*     3.3    23.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 116 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28C  MET*     3.7    20.4    -      -       +      +
     46C  MET*     4.6    26.5    -      -       +      +
     48C  ILE*     3.6    32.5    -      -       +      -
     51C  ILE*     3.8    26.2    -      -       +      -
    112C  GLN*     3.0    20.0    +      -       +      +
    113C  ILE*     3.0    14.8    +      -       +      +
    115C  ALA*     1.3    80.3    -      -       +      +
    117C  VAL*     1.3    59.3    +      -       -      +
    118C  THR      3.6     3.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 117 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118B  ASP      5.3     0.5    -      -       -      +
    120B  PRO*     3.6    30.4    -      -       +      +
    123B  GLN*     5.5     2.1    +      -       -      -
     24C  TYR*     3.7    26.0    -      -       +      +
     28C  MET*     3.7    37.2    -      -       +      -
    113C  ILE      3.1    12.3    +      -       -      +
    114C  MET*     3.5    22.2    -      -       +      +
    116C  MET*     1.3    75.3    -      -       -      +
    118C  THR*     1.3    59.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 118 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     4.0    22.6    +      -       +      +
    118B  ASP*     3.6    33.6    -      -       -      +
    119B  SER*     3.4    39.5    -      -       -      +
    120B  PRO*     4.2     0.5    -      -       -      +
    114C  MET*     2.7    22.7    +      -       -      +
    115C  ALA*     3.3    17.0    +      -       -      +
    116C  MET      3.3     3.9    -      -       -      +
    117C  VAL*     1.3    81.1    -      -       -      +
----------------------------------------------------------
 Back to top of page


A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il