Contacts of the helix formed by residues 263 - 285 (chain J) in PDB entry 6C6U


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 263 (chain J).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250J  ARG*     5.0     6.6    -      -       -      -
    251J  PRO*     3.9    23.9    +      -       -      +
    252J  LEU*     4.7     0.4    -      -       -      +
    253J  VAL*     5.6     2.5    -      -       -      +
    261J  ALA      3.9     0.2    +      -       -      -
    262J  THR*     1.3    97.0    +      -       -      +
    264J  ASP*     1.3    72.0    +      -       -      +
    265J  LEU*     3.2    16.9    +      -       -      +
    266J  ASN*     3.6    14.1    +      -       -      +
    267J  ASP*     3.7     2.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 264 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262J  THR      4.5     4.3    -      -       -      +
    263J  SER*     1.3    78.4    +      -       -      +
    265J  LEU*     1.3    59.8    +      -       -      +
    267J  ASP*     3.3     9.2    +      -       -      +
    268J  LEU*     3.0    30.1    +      -       -      +
    322J  ARG*     5.6     8.0    +      -       -      -
    324J  LEU*     3.5    27.1    -      -       +      +
    325J  LYS*     3.0    47.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 265 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245J  LEU*     3.7    24.5    -      -       +      -
    249J  LEU      4.7     0.2    -      -       -      +
    250J  ARG*     3.9    23.1    -      -       +      -
    263J  SER*     3.2     8.6    -      -       -      +
    264J  ASP*     1.3    75.6    -      -       +      +
    266J  ASN*     1.3    60.6    +      -       -      +
    268J  LEU*     3.2     8.3    +      -       +      +
    269J  TYR*     2.9    47.5    +      -       +      -
    306J  LEU*     5.8     1.1    -      -       +      +
    325J  LYS*     4.1    15.0    -      -       +      +
    326J  SER*     4.3     5.6    -      -       -      -
    327J  LEU*     3.8    25.6    -      -       +      -
    330J  MET*     3.6    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 266 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43J  THR*     5.1     6.4    -      -       +      +
     56J  LEU*     3.7    22.1    -      -       +      +
     57J  PHE*     3.7    23.5    -      -       +      -
    250J  ARG*     3.3    47.6    +      -       -      -
    251J  PRO      4.6     0.2    +      -       -      -
    252J  LEU*     4.2     6.2    -      -       +      +
    262J  THR*     3.6    23.1    +      -       -      +
    263J  SER*     3.6     8.1    +      -       -      -
    264J  ASP      3.4     0.6    -      -       -      -
    265J  LEU*     1.3    75.4    -      -       -      +
    267J  ASP*     1.3    57.2    +      -       -      +
    269J  TYR*     4.6     0.2    -      -       -      -
    270J  ARG*     2.9    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 267 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A    G      5.2     1.4    -      -       -      +
     24B    C      5.2     6.1    +      -       -      -
    262J  THR*     4.8    11.6    +      -       +      +
    263J  SER      3.7     6.7    +      -       -      +
    264J  ASP*     3.3    15.0    +      -       -      +
    265J  LEU      3.2     0.2    -      -       -      -
    266J  ASN*     1.3    78.6    -      -       -      +
    268J  LEU*     1.3    58.0    +      -       -      +
    270J  ARG*     3.4    30.9    +      -       -      +
    271J  ARG*     3.0    45.2    +      -       -      +
    318J  GLY*     4.8     6.4    -      -       -      -
    324J  LEU*     3.7    23.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 268 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264J  ASP      3.0    13.4    +      -       -      +
    265J  LEU*     3.2    11.4    +      -       +      +
    267J  ASP*     1.3    77.4    -      -       -      +
    269J  TYR*     1.3    62.6    +      -       +      +
    271J  ARG*     3.2    10.8    +      -       +      +
    272J  VAL*     3.0    26.9    +      -       -      +
    302J  ALA      5.3     1.1    -      -       -      +
    305J  ALA*     4.0    25.4    -      -       +      +
    306J  LEU*     4.0    20.9    -      -       +      +
    316J  ILE*     3.7    29.8    -      -       +      -
    324J  LEU*     3.7    11.2    -      -       +      -
    325J  LYS      3.4    26.0    -      -       -      +
    326J  SER*     3.9    14.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 269 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1332I  SER*     4.5     3.1    +      -       -      -
     56J  LEU*     3.8    19.5    -      -       +      -
    105J  ILE*     4.3    10.1    -      -       +      -
    242J  LEU*     4.2     5.2    -      -       +      -
    243J  PRO      3.5    23.1    +      -       -      -
    244J  VAL*     3.6    25.3    -      -       +      -
    245J  LEU*     3.5    26.5    +      -       +      +
    250J  ARG*     4.2    15.0    -      -       -      -
    265J  LEU*     2.9    46.3    +      -       +      +
    268J  LEU*     1.3    76.0    -      -       +      +
    270J  ARG*     1.3    57.4    +      -       -      +
    272J  VAL*     3.3     2.5    +      -       -      +
    273J  ILE*     2.9    38.2    +      -       +      +
    306J  LEU*     3.8    27.4    -      -       +      +
    327J  LEU*     4.1    18.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 270 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A    C      6.1     1.6    -      -       -      -
      5A    T      3.6    30.2    +      -       -      +
      6A    G      4.3     1.6    +      -       -      -
     24B    C      3.8    17.0    -      -       -      +
     41J  PRO*     3.6    37.9    -      -       +      +
     43J  THR*     5.4     7.0    -      -       -      +
     56J  LEU*     4.5     6.5    -      -       +      +
    266J  ASN      2.9    20.8    +      -       -      +
    267J  ASP*     3.4    28.1    +      -       -      +
    268J  LEU      3.2     0.2    -      -       -      -
    269J  TYR*     1.3    76.0    -      -       -      +
    271J  ARG*     1.3    58.0    +      -       -      +
    273J  ILE      3.9     0.2    -      -       -      -
    274J  ASN*     2.9    44.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 271 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A    G      4.4    26.4    +      -       -      -
    267J  ASP*     3.0    33.5    +      -       -      +
    268J  LEU*     3.5    13.0    -      -       +      +
    270J  ARG*     1.3    74.9    -      -       -      +
    272J  VAL*     1.3    63.4    +      -       +      +
    274J  ASN*     3.5     8.3    +      -       +      +
    275J  ARG*     3.0    30.7    +      -       +      +
    302J  ALA*     4.5    18.6    -      -       +      +
    305J  ALA*     5.7     1.5    -      -       -      +
    316J  ILE*     3.3    47.1    -      -       -      +
    317J  THR      4.8    10.3    +      -       -      -
    324J  LEU*     5.4     0.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 272 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105J  ILE*     4.7    16.4    -      -       +      -
    107J  LEU*     4.6    16.2    -      -       +      -
    242J  LEU*     5.2     3.8    -      -       +      -
    268J  LEU      3.0    16.3    +      -       -      +
    269J  TYR*     3.3     5.6    +      -       -      +
    271J  ARG*     1.3    74.6    -      -       -      +
    273J  ILE*     1.3    59.0    +      -       +      +
    275J  ARG*     3.4     2.5    +      -       -      +
    276J  ASN*     2.9    33.2    +      -       +      +
    299J  LEU*     5.2     3.8    -      -       +      +
    302J  ALA*     3.8    33.9    -      -       +      +
    303J  VAL*     4.2    20.0    -      -       +      +
    306J  LEU*     3.7    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 273 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38J  VAL*     3.6    27.1    -      -       +      +
     39J  LYS*     3.9     8.5    -      -       -      +
     40J  LYS      3.7    20.4    -      -       -      +
     41J  PRO*     3.9     4.7    -      -       +      -
     56J  LEU*     3.7    19.7    -      -       +      -
    105J  ILE*     4.0    30.1    -      -       +      -
    269J  TYR*     2.9    21.9    +      -       +      +
    270J  ARG      4.1     2.5    -      -       -      +
    272J  VAL*     1.3    75.5    -      -       -      +
    274J  ASN*     1.3    64.9    +      -       -      +
    276J  ASN*     4.0     4.8    -      -       +      +
    277J  ASN*     3.0    48.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 274 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A    C      5.6    10.9    +      -       -      +
      5A    T      5.6    11.3    +      -       -      +
     41J  PRO*     3.3    21.1    -      -       -      +
    270J  ARG*     2.9    42.8    +      -       -      +
    271J  ARG*     3.7     7.5    -      -       +      +
    273J  ILE*     1.3    77.4    -      -       -      +
    275J  ARG*     1.3    62.8    +      -       -      +
    277J  ASN*     3.9     4.8    -      -       -      +
    278J  ARG*     3.0    36.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 275 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A    G      4.1    21.0    +      -       -      -
    271J  ARG*     3.0    23.8    +      -       +      +
    272J  VAL*     4.0     4.5    -      -       -      +
    274J  ASN*     1.3    76.7    -      -       -      +
    276J  ASN*     1.3    57.5    +      -       -      +
    278J  ARG*     3.4    33.9    +      -       -      +
    279J  LEU*     3.0    27.2    +      -       -      +
    295J  GLU*     3.3    32.6    +      -       -      +
    298J  MET*     3.5    40.8    +      -       -      +
    299J  LEU*     3.8    31.9    -      -       +      +
    302J  ALA*     5.0     4.7    -      -       +      -
     13N  GLN*     6.2     0.4    -      -       -      +
     68N  TYR*     5.6     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 276 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105J  ILE*     3.6    19.8    -      -       -      +
    106J  GLU      3.2    23.1    +      -       -      +
    107J  LEU*     3.6    13.6    -      -       +      +
    108J  ALA*     3.2    27.4    +      -       -      +
    272J  VAL*     2.9    20.7    +      -       +      +
    273J  ILE*     4.0     4.9    -      -       +      +
    275J  ARG*     1.3    75.4    -      -       -      +
    277J  ASN*     1.3    62.4    +      -       -      +
    279J  LEU*     3.2     1.0    +      -       -      -
    280J  LYS*     2.9    31.7    +      -       -      +
    299J  LEU*     3.7    19.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 277 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39J  LYS*     3.0    29.4    +      -       -      +
     40J  LYS*     4.3     0.4    -      -       -      +
     41J  PRO*     4.1    10.3    -      -       -      +
    273J  ILE*     3.0    33.7    +      -       -      +
    274J  ASN*     3.9     3.8    -      -       -      +
    276J  ASN*     1.3    77.1    -      -       -      +
    278J  ARG*     1.3    59.8    +      -       +      +
    280J  LYS*     3.3    19.1    +      -       -      +
    281J  ARG*     3.0    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 278 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5A    T      3.9    25.3    +      -       -      -
      6A    G      4.9     6.7    +      -       -      -
    274J  ASN*     3.0    27.3    +      -       -      +
    275J  ARG*     3.4    38.2    -      -       -      +
    277J  ASN*     1.3    76.3    -      -       +      +
    279J  LEU*     1.3    58.8    +      -       -      +
    281J  ARG*     3.4    22.1    +      -       -      +
    282J  LEU*     2.9    32.6    +      -       -      +
    295J  GLU*     3.7    18.4    +      -       -      +
     16N  SER*     5.0     5.6    +      -       -      -
     66N  PRO*     2.8    48.9    +      -       +      +
     68N  TYR*     5.3     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 279 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108J  ALA*     3.7    15.3    -      -       +      -
    109J  SER*     4.6     7.0    -      -       -      +
    275J  ARG      3.0    15.6    +      -       -      +
    276J  ASN*     3.2     7.2    +      -       -      +
    278J  ARG*     1.3    75.7    -      -       -      +
    280J  LYS*     1.3    59.8    +      -       -      +
    282J  LEU*     3.8     2.5    -      -       +      +
    283J  LEU*     2.9    50.9    +      -       +      +
    292J  VAL*     5.2     3.4    -      -       +      +
    295J  GLU*     3.5    47.7    -      -       +      +
    296J  LYS*     3.6    25.4    -      -       +      +
    299J  LEU*     3.8    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 280 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37J  GLU*     3.9    19.2    +      -       -      -
     39J  LYS*     5.6     4.9    -      -       -      +
    106J  GLU*     3.8    24.5    +      -       -      +
    108J  ALA*     3.7    19.5    -      -       +      +
    276J  ASN*     2.9    26.2    +      -       -      +
    277J  ASN*     3.3    18.4    +      -       -      +
    279J  LEU*     1.3    76.6    -      -       -      +
    281J  ARG*     1.3    58.3    +      -       -      +
    283J  LEU*     3.4     4.8    +      -       -      +
    284J  ASP*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 281 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277J  ASN      3.0    16.9    +      -       -      +
    278J  ARG*     3.9    17.9    +      -       -      +
    279J  LEU      3.3     0.4    -      -       -      -
    280J  LYS*     1.3    77.4    -      -       -      +
    282J  LEU*     1.3    66.6    +      -       +      +
    284J  ASP*     3.2     6.9    +      -       -      +
    285J  LEU*     3.2    40.4    +      -       +      +
     63N  LYS      4.4    13.2    +      -       -      +
     64N  PHE*     5.3     6.1    -      -       -      +
     66N  PRO*     3.4    42.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 282 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    278J  ARG      2.9    20.9    +      -       -      +
    279J  LEU*     4.0     4.9    -      -       -      +
    281J  ARG*     1.3    81.3    -      -       +      +
    283J  LEU*     1.3    62.3    +      -       -      +
    284J  ASP      3.6     0.2    +      -       -      -
    285J  LEU*     4.0     3.0    +      -       +      -
    286J  ALA      3.8     1.4    +      -       -      -
    287J  ALA*     3.2    48.0    +      -       +      +
    291J  ILE*     4.2    17.3    -      -       +      +
    292J  VAL*     4.0    11.2    -      -       +      +
    295J  GLU*     3.7    31.2    -      -       +      +
     64N  PHE*     5.3     4.3    -      -       +      -
     65N  PHE*     4.1    22.9    -      -       +      -
     66N  PRO*     4.2    24.7    -      -       +      -
     68N  TYR*     5.2     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 283 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108J  ALA*     4.4    18.8    -      -       +      +
    279J  LEU*     2.9    40.4    +      -       +      +
    280J  LYS*     4.0     4.7    -      -       -      +
    282J  LEU*     1.3    74.8    -      -       -      +
    284J  ASP*     1.3    64.1    +      -       -      +
    286J  ALA*     4.1     6.3    +      -       -      +
    292J  VAL*     4.0    27.1    -      -       +      -
    296J  LYS*     4.8    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 284 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    280J  LYS      2.9    17.8    +      -       -      +
    281J  ARG*     3.4     9.8    -      -       -      +
    282J  LEU      3.2     0.6    -      -       -      -
    283J  LEU*     1.3    81.3    -      -       -      +
    285J  LEU*     1.3    71.9    -      -       +      +
    286J  ALA*     3.2     6.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 285 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281J  ARG*     3.2    31.2    +      -       +      +
    282J  LEU*     4.0     3.1    +      -       +      +
    283J  LEU      3.6     0.2    -      -       -      -
    284J  ASP*     1.3    92.9    -      -       +      +
    286J  ALA*     1.3    65.0    +      -       -      +
    287J  ALA*     3.6     2.2    -      -       -      -
     47N  GLU*     4.9     7.9    -      -       -      +
     64N  PHE*     4.5    31.2    -      -       +      -
     65N  PHE*     5.9     2.9    -      -       +      -
    114N  ARG*     3.2    38.2    +      -       -      +
----------------------------------------------------------
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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