Contacts of the helix formed by residues 60 - 83 (chain J) in PDB entry 3IT8


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 PRO 60 (chain J).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5J  TYR*     3.7    27.6    -      -       +      +
      7J  TYR*     5.2     2.2    -      -       -      +
     53J  ILE*     5.1     4.5    -      -       -      +
     58J  HIS      3.5     7.1    -      -       -      +
     59J  THR*     1.3    99.3    -      -       +      +
     61J  GLY*     1.3    63.5    +      -       -      +
     63J  ASP*     4.6     0.5    +      -       -      -
     64J  TYR*     3.4    28.0    +      -       +      -
     65J  ASN*     3.7    19.7    -      -       -      +
    154J  TYR      6.0     0.9    -      -       -      +
    158J  PHE*     4.1    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 61 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59J  THR      3.6     2.7    +      -       -      -
     60J  PRO*     1.3    71.8    -      -       -      +
     62J  ASN*     1.3    77.7    +      -       -      +
     63J  ASP      3.2     1.6    -      -       -      -
     65J  ASN*     2.9    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 62 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61J  GLY*     1.3    74.6    -      -       -      +
     63J  ASP*     1.3    78.9    +      -       -      +
     65J  ASN*     2.9    28.8    +      -       -      +
     66J  PHE*     3.4     5.2    +      -       -      +
     67J  ASN*     5.0     7.5    +      -       -      +
    154J  TYR*     4.9     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 63 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33J  ILE*     3.6    17.6    -      -       +      +
     42J  GLY      5.1     8.2    -      -       -      +
     43J  ASN*     6.2     0.7    -      -       -      -
     44J  VAL*     3.6    23.6    -      -       -      +
     47J  ARG*     4.9     6.5    +      -       -      +
     60J  PRO      4.6     0.9    +      -       -      -
     61J  GLY*     3.2     1.0    -      -       -      -
     62J  ASN*     1.3    82.2    -      -       -      +
     64J  TYR*     1.3    72.3    +      -       -      +
     66J  PHE*     3.0    25.1    +      -       +      +
     67J  ASN*     5.9     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 64 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5J  TYR*     3.6    17.3    -      +       -      -
      7J  TYR*     2.6    36.6    +      -       +      +
     21J  PHE*     3.2    31.0    -      +       +      -
     23J  ASP*     2.8    29.8    +      -       -      -
     31J  THR*     2.9    37.4    +      -       +      -
     33J  ILE*     3.8     5.4    -      -       +      -
     44J  VAL*     6.3     0.2    -      -       +      -
     47J  ARG*     3.5    11.1    +      -       -      -
     51J  PHE*     4.2     4.9    -      -       -      -
     53J  ILE*     4.1    11.9    -      -       +      +
     59J  THR*     3.4    27.0    -      -       +      +
     60J  PRO*     3.4    17.9    +      -       +      -
     61J  GLY      3.3     6.6    +      -       -      -
     62J  ASN      3.3     0.4    -      -       -      -
     63J  ASP*     1.3    82.4    -      -       -      +
     65J  ASN*     1.3    74.5    +      -       -      +
     66J  PHE      3.0     0.7    +      -       -      -
    170J  TYR*     4.0     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 65 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60J  PRO*     3.7    18.2    -      -       -      +
     61J  GLY      2.9    13.2    +      -       -      +
     62J  ASN*     2.9    37.6    +      -       -      +
     64J  TYR*     1.3    74.8    -      -       -      +
     66J  PHE*     1.3    64.8    +      -       -      +
     67J  ASN      3.5     1.6    -      -       -      -
     68J  PHE*     3.3    14.5    +      -       +      +
     69J  TRP*     3.1    35.3    +      -       +      +
    154J  TYR*     3.6    43.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 66 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7J  TYR*     4.5    13.5    -      +       +      -
     19J  GLY*     3.8    24.2    -      -       -      -
     20J  VAL      3.9    12.8    -      -       -      -
     21J  PHE*     3.7    28.3    -      +       +      -
     33J  ILE*     3.6    20.9    -      -       +      -
     34J  SER      4.1     1.6    -      -       -      -
     35J  TYR*     3.8    18.6    -      +       +      -
     42J  GLY*     3.8    29.8    -      -       -      -
     62J  ASN      3.4     3.1    +      -       -      +
     63J  ASP*     3.0    20.9    +      -       +      +
     64J  TYR*     3.0     3.3    -      -       +      +
     65J  ASN*     1.3    74.2    -      -       -      +
     67J  ASN*     1.3    67.1    -      -       -      +
     69J  TRP      3.2     0.5    +      -       -      -
     70J  TYR*     2.8    52.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 67 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35J  TYR*     5.4     1.4    -      -       -      -
     41J  HIS*     3.6    18.3    +      -       -      +
     42J  GLY*     3.0    28.9    +      -       -      -
     62J  ASN*     5.0     7.7    +      -       -      +
     63J  ASP*     5.9     1.0    +      -       -      -
     65J  ASN      3.5     0.4    -      -       -      -
     66J  PHE*     1.3    80.1    -      -       -      +
     68J  PHE*     1.3    63.8    +      -       -      +
     70J  TYR*     3.9     4.8    -      -       -      +
     71J  SER*     3.1    26.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 68 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65J  ASN*     3.3    15.8    +      -       +      +
     66J  PHE      3.2     0.2    -      -       -      -
     67J  ASN*     1.3    80.0    -      -       -      +
     69J  TRP*     1.3   103.9    +      +       -      +
     71J  SER*     3.8     3.3    -      -       -      -
     72J  LEU*     3.0    43.0    +      -       +      +
    147J  LEU*     4.2    22.2    -      -       +      +
    150J  ASP*     3.5    37.2    -      -       +      -
    151J  VAL*     4.2     5.8    -      -       +      -
    154J  TYR*     3.7    28.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with TRP 69 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7J  TYR*     3.5    48.6    +      +       +      -
     64J  TYR      3.8     1.3    -      -       -      -
     65J  ASN*     3.1    32.3    +      -       +      +
     66J  PHE      3.9     0.7    -      -       -      +
     68J  PHE*     1.3   101.1    -      +       -      +
     70J  TYR*     1.3    68.6    +      -       -      +
     72J  LEU*     4.3    10.8    -      -       +      +
     73J  MET*     2.7    45.6    +      -       +      +
     93J  LEU*     3.7    30.5    -      -       +      -
    140J  MET*     4.1    17.0    -      -       -      -
    151J  VAL*     4.2    16.2    -      -       +      -
    154J  TYR*     3.7    26.0    -      -       +      +
    155J  LEU*     3.9    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 70 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7J  TYR*     5.6     0.2    -      -       -      -
      9J  VAL*     3.9    16.5    -      -       +      +
     17J  TYR*     2.6    37.4    +      -       +      +
     18J  ASP      4.0     3.1    -      -       -      -
     19J  GLY*     3.8    26.7    -      -       -      -
     35J  TYR*     3.4    58.7    -      +       +      -
     37J  HIS*     4.2     1.4    -      -       -      -
     66J  PHE*     2.8    37.9    +      +       +      +
     67J  ASN*     3.9     4.0    -      -       -      +
     69J  TRP*     1.3    71.8    -      -       -      +
     71J  SER*     1.3    64.1    +      -       -      +
     73J  MET*     3.7     2.1    -      -       -      +
     74J  LYS*     2.8    57.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 71 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67J  ASN      3.1    16.3    +      -       -      -
     68J  PHE*     3.8     3.6    -      -       -      -
     70J  TYR*     1.3    89.6    -      -       -      +
     72J  LEU*     1.3    57.4    +      -       -      +
     74J  LYS*     3.2     8.0    +      -       -      +
     75J  GLU*     3.0    27.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 72 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68J  PHE*     3.0    48.6    +      -       +      +
     69J  TRP*     4.0     9.0    -      -       +      +
     71J  SER*     1.3    76.9    +      -       -      +
     73J  MET*     1.3    57.8    +      -       -      +
     75J  GLU*     3.5    16.2    +      -       -      +
     76J  THR*     2.8    29.5    +      -       -      -
    140J  MET*     3.5    30.3    -      -       +      +
    145J  ASN*     3.8    25.8    -      -       -      +
    147J  LEU*     4.3    20.6    -      -       +      -
    151J  VAL*     3.7    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 73 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7J  TYR*     3.7    36.1    -      -       -      +
      9J  VAL*     3.8    21.2    -      -       +      +
     69J  TRP*     2.7    38.5    +      -       +      +
     70J  TYR*     5.3     0.2    -      -       -      -
     72J  LEU*     1.3    71.4    -      -       -      +
     74J  LYS*     1.3    61.8    +      -       -      +
     76J  THR*     3.5     1.7    -      -       -      -
     77J  LEU*     2.8    31.7    +      -       -      +
     91J  LEU*     3.4    40.2    -      -       +      +
     92J  SER*     3.9     2.0    -      -       -      +
     93J  LEU*     3.7    15.7    -      -       -      +
    140J  MET*     3.2    29.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 74 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9J  VAL*     4.4     9.8    -      -       +      +
     17J  TYR*     3.9    34.5    -      -       +      +
     35J  TYR*     6.0     0.2    +      -       -      -
     70J  TYR*     2.8    46.0    +      -       +      +
     71J  SER*     3.3     8.5    -      -       -      +
     73J  MET*     1.3    78.7    -      -       -      +
     75J  GLU*     1.3    63.3    +      -       -      +
     77J  LEU*     3.2     3.6    +      -       -      +
     78J  GLU*     3.0    46.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 75 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71J  SER      3.0    12.9    +      -       -      +
     72J  LEU*     3.6    20.5    -      -       -      +
     73J  MET      3.2     0.2    -      -       -      -
     74J  LYS*     1.3    76.4    -      -       -      +
     76J  THR*     1.3    61.4    +      -       -      +
     78J  GLU*     3.2    13.1    +      -       -      +
     79J  GLU*     3.1    39.3    +      -       +      +
    139J  GLY*     3.9     8.2    +      -       -      -
    145J  ASN*     3.2    25.7    +      -       -      +
    146J  THR*     6.0     2.3    -      -       -      +
    147J  LEU*     5.3     4.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 76 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72J  LEU      2.8    19.3    +      -       -      -
     73J  MET*     3.2     6.0    +      -       -      -
     75J  GLU*     1.3    77.4    -      -       -      +
     77J  LEU*     1.3    62.1    +      -       -      +
     79J  GLU*     3.4     3.3    +      -       -      +
     80J  ILE*     3.0    35.5    +      -       +      +
     91J  LEU*     3.6    20.6    -      -       +      -
    110J  VAL*     6.1     0.2    -      -       +      -
    138J  VAL*     4.2    16.8    -      -       +      +
    139J  GLY*     3.3     8.1    -      -       -      -
    140J  MET*     2.8    37.0    +      -       +      +
    141J  LEU*     4.5     7.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 77 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9J  VAL*     3.7    35.2    -      -       +      +
     11J  LEU*     4.5     1.6    -      -       +      +
     17J  TYR*     3.8    22.7    -      -       +      -
     73J  MET      2.8    20.3    +      -       -      +
     74J  LYS      3.2     4.9    +      -       -      +
     76J  THR*     1.3    73.1    -      -       -      +
     78J  GLU*     1.3    62.2    +      -       -      +
     80J  ILE*     3.3     9.1    +      -       +      +
     81J  ASN*     3.0    47.5    +      -       -      +
     88J  THR*     3.9    16.6    -      -       -      +
     89J  THR      4.0    14.1    -      -       -      +
     90J  SER*     4.1    14.8    -      -       -      +
     91J  LEU*     4.0    10.1    -      -       +      +
    112J  THR*     6.1     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 78 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17J  TYR*     3.3    32.5    -      -       +      +
     74J  LYS*     3.0    45.8    +      -       -      +
     75J  GLU*     3.5    11.6    -      -       -      +
     77J  LEU*     1.3    76.7    -      -       -      +
     79J  GLU*     1.3    69.0    +      -       -      +
     81J  ASN*     3.1    14.5    +      -       -      +
     82J  LYS*     3.4    17.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 79 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75J  GLU*     3.1    29.7    +      -       +      +
     76J  THR      3.8     1.8    -      -       -      +
     77J  LEU      3.3     0.2    -      -       -      -
     78J  GLU*     1.3    78.5    -      -       -      +
     80J  ILE*     1.3    63.9    +      -       -      +
     82J  LYS*     3.0    52.2    +      -       -      +
     83J  ASN*     4.2     2.8    +      -       -      +
    138J  VAL*     3.6    35.8    -      -       +      +
    139J  GLY*     4.4     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 80 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76J  THR*     3.0    36.4    +      -       +      +
     77J  LEU*     3.5    10.5    -      -       +      +
     78J  GLU      3.3     0.2    -      -       -      -
     79J  GLU*     1.3    75.3    -      -       -      +
     81J  ASN*     1.3    65.0    +      -       -      +
     82J  LYS      3.4     0.7    +      -       -      -
     83J  ASN*     3.6     6.6    +      -       -      +
     86J  THR*     3.3    49.5    -      -       +      +
     87J  LYS      3.9     0.2    +      -       -      -
     88J  THR*     4.4     7.6    -      -       -      +
     91J  LEU*     4.1    17.5    -      -       +      -
    112J  THR*     4.7     2.7    -      -       -      +
    117J  LEU*     4.1    25.8    -      -       +      -
    136J  PRO*     4.0    12.3    -      -       +      -
    138J  VAL*     4.0    15.0    -      -       +      -
    141J  LEU*     4.9     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 81 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11J  LEU*     4.0    18.3    -      -       -      +
     17J  TYR*     4.5     6.0    +      -       -      +
     77J  LEU*     3.0    34.5    +      -       -      +
     78J  GLU*     3.7     7.0    -      -       -      +
     79J  GLU      3.1     1.0    -      -       -      -
     80J  ILE*     1.3    76.6    -      -       -      +
     82J  LYS*     1.3    63.2    +      -       -      +
     83J  ASN      3.4     5.0    -      -       -      -
     84J  ASP*     4.2     0.9    +      -       -      -
     87J  LYS*     3.0    32.4    -      -       +      +
     88J  THR*     2.6    45.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 82 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78J  GLU*     3.4    15.0    +      -       -      +
     79J  GLU*     3.0    39.8    +      -       -      +
     81J  ASN*     1.3    77.3    -      -       -      +
     83J  ASN*     1.3    61.1    +      -       -      +
     84J  ASP*     3.0     9.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 83 (chain J). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79J  GLU      4.2     2.7    +      -       -      +
     80J  ILE      3.6     5.3    +      -       -      +
     81J  ASN      3.4     0.6    -      -       -      -
     82J  LYS*     1.3    75.5    -      -       -      +
     84J  ASP*     1.3    53.8    +      -       -      +
     85J  SER*     2.7    38.7    +      -       -      -
     86J  THR*     2.8    25.9    +      -       -      +
     87J  LYS      3.5     6.6    +      -       -      -
    136J  PRO*     6.6     0.2    -      -       +      -
    327J  NAG      1.4    69.5    +      -       -      +
----------------------------------------------------------
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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