Contacts of the helix formed by residues 183 - 204 (chain B) in PDB entry 2AXZ


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 GLY 183 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  PHE      6.3     0.4    -      -       -      -
     60A  GLU*     5.9     0.2    -      -       -      -
     63A  ASN*     2.9    22.6    -      -       -      +
     68A  ASN*     4.7     0.4    +      -       -      -
    300A  GLU*     5.7     1.6    -      -       -      -
    181B  SER*     3.7     4.2    +      -       -      -
    182B  PHE*     1.3    76.5    -      -       -      +
    184B  LYS*     1.3    59.6    +      -       -      -
    185B  ASP*     3.3     3.4    -      -       -      -
    186B  TYR*     3.2     3.4    +      -       -      +
    187B  ASP*     2.7    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  LYS*     3.4    46.5    +      -       +      +
    185A  ASP*     3.3    32.3    -      -       -      +
    188A  LEU*     5.4     9.7    -      -       -      +
    298A  TYR*     5.7     2.8    -      -       -      -
    299A  TYR      4.9     5.1    +      -       -      -
    300A  GLU*     3.6    33.2    +      -       -      +
    183B  GLY*     1.3    70.1    -      -       -      -
    185B  ASP*     1.3    61.2    +      -       -      +
    187B  ASP*     3.2    10.1    +      -       -      +
    188B  LEU*     2.9    28.2    +      -       -      +
    227B  SER*     4.0    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  ASN*     4.3    12.2    +      -       -      +
     59A  PHE*     5.5     7.4    -      -       -      +
    184A  LYS*     3.1    28.2    +      -       -      +
     70B  LYS*     5.6     1.6    +      -       -      -
    150B  GLY*     5.5     0.7    -      -       -      -
    183B  GLY*     3.3     1.0    -      -       -      -
    184B  LYS*     1.3    77.5    -      -       -      +
    186B  TYR*     1.3    59.7    +      -       -      +
    188B  LEU*     3.6     8.0    -      -       -      +
    189B  THR*     3.3    25.8    +      -       -      +
    299B  TYR      5.4     2.1    -      -       -      +
    300B  GLU*     5.2     2.9    -      -       -      +
      7F  VAL*     3.4    37.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 186 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60A  GLU*     4.2    10.1    -      -       +      +
     64A  ARG*     3.9    10.3    -      -       -      -
    148B  PHE      4.3     7.7    +      -       -      -
    149B  PHE      4.4     1.1    -      -       -      -
    150B  GLY*     3.6    28.7    -      -       -      -
    153B  TYR*     4.2     6.2    +      +       -      -
    178B  ILE*     3.9    19.1    -      -       +      +
    180B  ASP      3.5    24.1    +      -       -      -
    181B  SER*     4.3     0.2    -      -       -      -
    182B  PHE*     3.5    54.9    -      +       +      +
    183B  GLY      3.2     9.0    +      -       -      +
    184B  LYS      3.1     0.2    -      -       -      -
    185B  ASP*     1.3    78.0    -      -       -      +
    187B  ASP*     1.3    68.6    +      -       -      +
    188B  LEU      3.1     0.4    -      -       -      -
    189B  THR*     3.0    18.8    +      -       -      -
    190B  ILE*     3.1    44.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 187 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300A  GLU*     4.6     1.0    -      -       -      +
    181B  SER*     2.5    29.9    +      -       -      -
    183B  GLY      2.7    17.6    +      -       -      +
    184B  LYS*     3.2    16.1    -      -       -      +
    186B  TYR*     1.3    84.5    -      -       -      +
    188B  LEU*     1.3    59.5    +      -       -      +
    190B  ILE*     3.2    11.4    -      -       -      +
    191B  GLN*     2.9    33.7    +      -       -      +
    225B  ASN      3.9     1.6    -      -       -      +
    226B  ILE*     2.7    38.3    -      -       +      +
    227B  SER*     3.9    11.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 188 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  LYS*     4.4    13.0    -      -       -      +
    184B  LYS      2.9    16.9    +      -       -      +
    185B  ASP*     3.6     9.4    -      -       -      +
    186B  TYR      3.1     0.2    -      -       -      -
    187B  ASP*     1.3    79.5    -      -       -      +
    189B  THR*     1.3    57.7    +      -       -      +
    191B  GLN*     3.3     6.3    +      -       -      +
    192B  THR*     3.0    27.9    +      -       -      -
    229B  ASN*     4.4    11.9    -      -       +      +
    232B  TYR*     3.6    28.3    -      -       +      +
    298B  TYR*     3.8    30.7    -      -       +      +
    299B  TYR      4.5     8.5    -      -       -      +
      5F  VAL*     3.5    29.6    -      -       +      -
      7F  VAL*     4.7    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 189 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150B  GLY*     3.5    23.0    +      -       -      +
    153B  TYR*     3.9     8.3    -      -       -      +
    154B  GLU*     3.9    23.3    -      -       +      +
    157B  SER*     3.7     0.7    +      -       -      -
    185B  ASP      3.3    13.4    +      -       -      +
    186B  TYR*     3.0    18.9    +      -       -      -
    188B  LEU*     1.3    72.4    -      -       -      +
    190B  ILE*     1.3    63.2    +      -       -      +
    191B  GLN      3.1     2.5    -      -       -      -
    192B  THR*     3.1    17.7    +      -       -      -
    193B  VAL*     3.2    18.0    +      -       -      +
      5F  VAL*     4.0    11.7    -      -       +      -
      7F  VAL*     3.7    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 190 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153B  TYR*     3.4    35.0    -      -       +      -
    176B  TYR*     2.6    26.7    +      -       +      +
    178B  ILE*     4.3    17.3    -      -       +      -
    186B  TYR*     3.2    41.7    -      -       +      +
    187B  ASP*     3.2    28.0    -      -       +      +
    189B  THR*     1.3    76.9    +      -       -      +
    191B  GLN*     1.3    65.5    +      -       +      +
    194B  LEU*     3.6    12.9    +      -       -      +
    220B  LEU*     4.5    11.0    -      -       +      -
    226B  ILE*     4.0    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 191 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187B  ASP*     2.9    28.4    +      -       -      +
    188B  LEU*     3.3     6.1    +      -       -      +
    189B  THR      3.1     0.4    -      -       -      -
    190B  ILE*     1.3    80.6    -      -       +      +
    192B  THR*     1.3    58.9    +      -       -      +
    194B  LEU*     3.3     5.9    +      -       -      +
    195B  LYS*     3.0    28.6    +      -       -      +
    217B  PHE*     3.7    21.9    -      -       +      -
    220B  LEU*     3.9    24.0    -      -       +      -
    226B  ILE*     4.3     2.8    -      -       -      +
    227B  SER      3.2    26.9    +      -       -      -
    228B  ILE*     3.4    12.4    -      -       -      +
    229B  ASN*     2.9    30.8    +      -       -      +
    232B  TYR*     3.6    15.0    -      -       +      +
    236B  ILE*     4.6     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 192 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157B  SER*     3.5     5.4    -      -       -      +
    188B  LEU      3.0    14.0    +      -       -      -
    189B  THR      3.1     8.6    +      -       -      -
    191B  GLN*     1.3    75.4    -      -       -      +
    193B  VAL*     1.3    59.8    +      -       -      +
    195B  LYS*     3.2     3.0    +      -       -      +
    196B  ASN*     2.8    47.6    +      -       -      +
    232B  TYR*     2.8    30.5    +      -       +      +
      3F  THR*     3.7     7.6    -      -       -      +
      5F  VAL*     3.1    38.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 193 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153B  TYR*     3.1    28.3    -      -       +      +
    156B  VAL*     4.3    20.2    -      -       +      -
    157B  SER*     2.9    28.2    +      -       -      +
    160B  LEU*     4.0     3.4    -      -       +      +
    172B  ILE*     4.4    16.8    -      -       +      -
    175B  MSE      6.2     0.7    -      -       -      -
    176B  TYR*     3.2    30.3    -      -       +      +
    189B  THR      3.2     9.6    +      -       -      +
    191B  GLN      3.3     0.4    -      -       -      -
    192B  THR*     1.3    76.2    -      -       -      +
    194B  LEU*     1.3    59.1    +      -       +      +
    196B  ASN*     3.9     2.6    -      -       -      +
    197B  ALA*     2.9    32.9    +      -       +      +
    213B  TYR*     5.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 194 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176B  TYR*     3.6    29.2    -      -       +      -
    190B  ILE      3.6    10.1    +      -       -      +
    191B  GLN*     3.3     6.4    +      -       -      +
    192B  THR      3.2     0.4    -      -       -      -
    193B  VAL*     1.3    75.2    -      -       -      +
    195B  LYS*     1.3    59.1    +      -       -      +
    197B  ALA*     3.8     0.2    -      -       -      +
    198B  LEU*     2.8    34.0    +      -       -      +
    213B  TYR*     3.5    33.9    -      -       +      +
    216B  GLN*     3.5    25.6    -      -       +      -
    217B  PHE*     3.7    26.5    -      -       +      +
    220B  LEU*     3.7    30.1    -      -       +      -
    236B  ILE*     5.0     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 195 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191B  GLN      3.0    17.6    +      -       -      +
    192B  THR*     3.7     4.5    -      -       -      +
    194B  LEU*     1.3    78.4    -      -       -      +
    196B  ASN*     1.3    63.8    +      -       -      +
    198B  LEU*     3.8     3.7    -      -       -      +
    199B  THR*     2.7    34.2    +      -       -      +
    232B  TYR*     3.4    39.5    -      -       +      -
    235B  GLU*     3.1    30.3    +      -       +      +
    236B  ILE*     4.0    26.4    -      -       +      +
    239B  LEU*     4.0     2.2    -      -       +      +
    302B  TYR*     3.0    24.4    +      -       -      -
      1F  LEU      2.8    29.7    +      -       -      -
      3F  THR*     3.1    14.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 196 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157B  SER      3.3    14.2    -      -       -      +
    160B  LEU*     4.0    14.1    -      -       +      -
    192B  THR*     2.8    28.2    +      -       -      +
    193B  VAL*     3.9     2.9    -      -       -      +
    195B  LYS*     1.3    79.7    -      -       -      +
    197B  ALA*     1.3    66.1    +      -       -      +
    199B  THR*     3.3     3.5    +      -       -      -
    200B  ILE*     3.1    28.3    +      -       -      +
      1F  LEU      3.2    12.8    +      -       -      -
      2F  VAL*     3.7    13.6    -      -       +      +
      3F  THR*     2.7    48.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 197 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  LEU*     4.0    13.0    -      -       +      +
    165B  TYR*     4.5     7.1    -      -       +      -
    172B  ILE*     4.6     2.0    -      -       +      -
    193B  VAL      2.9    19.7    +      -       -      +
    196B  ASN*     1.3    74.7    -      -       -      +
    198B  LEU*     1.3    60.0    +      -       -      +
    199B  THR      3.2     0.2    +      -       -      -
    200B  ILE*     3.2     6.6    +      -       -      +
    201B  SER*     2.8    36.0    +      -       -      -
    213B  TYR*     3.4    39.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 198 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194B  LEU      2.8    19.5    +      -       -      +
    195B  LYS      3.8     3.4    -      -       -      +
    197B  ALA*     1.3    76.8    -      -       -      +
    199B  THR*     1.3    57.8    +      -       -      +
    201B  SER*     4.2     3.6    -      -       -      -
    202B  ILE*     3.0    44.7    +      -       +      +
    210B  ALA*     3.4    29.6    -      -       +      +
    213B  TYR*     4.1    10.9    -      -       +      -
    214B  ILE*     3.5    23.8    -      -       +      -
    236B  ILE*     3.8    29.4    -      -       +      +
    239B  LEU*     3.5    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 199 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195B  LYS      2.7    19.0    +      -       -      -
    196B  ASN      3.4     8.7    -      -       -      -
    197B  ALA      3.1     0.6    -      -       -      -
    198B  LEU*     1.3    74.6    -      -       -      +
    200B  ILE*     1.3    62.0    +      -       -      +
    202B  ILE*     3.3     2.9    +      -       -      +
    203B  MSE      2.9    46.0    +      -       +      +
    235B  GLU*     4.6     0.2    +      -       -      -
    239B  LEU*     3.4    15.1    -      -       +      +
    279B  GLU*     3.3    20.2    -      -       -      +
      1F  LEU*     2.8    44.5    +      -       -      +
      2F  VAL*     4.4     7.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 200 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160B  LEU*     3.6    49.8    -      -       +      +
    165B  TYR*     3.9    26.0    -      -       +      +
    196B  ASN      3.1    15.4    +      -       -      +
    197B  ALA*     3.7     5.6    -      -       -      +
    199B  THR*     1.3    75.4    -      -       -      +
    201B  SER*     1.3    58.6    +      -       -      +
    203B  MSE      3.4     5.5    +      -       -      +
    204B  ASN*     3.0    48.9    +      -       -      +
    289B  PHE*     3.7    24.5    -      -       +      -
      2F  VAL*     3.7    15.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 201 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165B  TYR*     4.5     8.3    -      -       -      -
    197B  ALA      2.8    20.1    +      -       -      -
    198B  LEU*     3.7     5.2    -      -       -      -
    200B  ILE*     1.3    77.7    -      -       -      +
    202B  ILE*     1.3    60.0    +      -       -      +
    204B  ASN      3.7     0.3    -      -       -      -
    205B  ARG      3.1     3.8    +      -       -      -
    206B  ASN*     2.8    37.7    +      -       -      -
    209B  GLU*     3.4    20.5    -      -       -      +
    210B  ALA*     3.6    26.0    -      -       -      -
    213B  TYR*     3.7    10.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 202 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198B  LEU*     3.0    34.7    +      -       +      +
    199B  THR      3.9     2.9    -      -       -      +
    201B  SER*     1.3    75.3    -      -       -      +
    203B  MSE      1.3    62.9    +      -       -      +
    205B  ARG*     3.1    25.4    +      -       -      +
    206B  ASN      5.0     0.2    -      -       -      +
    207B  LEU*     4.0     7.9    -      -       +      -
    210B  ALA*     3.4    21.8    -      -       +      -
    239B  LEU*     4.3    13.7    -      -       +      +
    242B  ILE*     3.7    28.0    -      -       +      -
    243B  TYR*     3.6    35.2    -      -       +      -
    246B  LEU*     4.1     4.3    -      -       +      -
    283B  ILE*     3.8    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MSE 203 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199B  THR*     2.9    35.5    +      -       +      +
    200B  ILE*     3.6     6.5    -      -       -      +
    202B  ILE*     1.3    76.5    -      -       -      +
    204B  ASN*     1.3    58.8    +      -       -      +
    205B  ARG*     3.0    21.1    +      -       -      +
    279B  GLU*     4.4    22.4    -      -       +      +
    282B  LYS*     4.6    21.3    -      -       +      -
    283B  ILE*     4.0    26.7    -      -       +      -
    286B  LYS*     4.9     1.6    -      -       -      +
    287B  GLU      3.4    26.6    -      -       -      +
    288B  LYS*     4.2     2.1    -      -       -      +
    289B  PHE*     3.4    48.7    -      -       +      +
    290B  THR      4.6     4.0    -      -       -      +
    292B  PRO*     6.2     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 204 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165B  TYR*     4.8     7.5    -      -       -      +
    200B  ILE*     3.0    37.1    +      -       -      +
    201B  SER*     4.4     2.0    -      -       -      +
    203B  MSE      1.3    73.1    -      -       -      +
    205B  ARG*     1.3    70.5    +      -       -      +
    206B  ASN*     3.4     7.6    +      -       +      +
    288B  LYS*     3.3    23.5    -      -       +      +
    289B  PHE*     2.7    33.2    +      -       -      +
----------------------------------------------------------
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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