Contacts of the helix formed by residues 209 - 233 (chain B) in PDB entry 3OX4


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 THR 209 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    245A  TYR*     4.4     9.5    -      -       -      +
      4B  SER*     3.9    28.7    -      -       -      +
      6B  PHE*     5.6     1.0    -      -       -      -
    207B  ALA      3.5    11.4    -      -       -      +
    208B  ALA*     1.3    78.6    -      -       -      +
    210B  PRO*     1.3    77.2    -      -       -      +
    211B  ILE*     3.1    18.4    +      -       -      +
    212B  THR*     2.8    22.6    +      -       +      +
    213B  ASP*     2.9    27.4    +      -       -      -
    256B  ASN*     5.7     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 210 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  LYS*     3.5    20.4    -      -       -      +
    222A  MET*     3.7    38.6    -      -       +      -
    245A  TYR*     4.0    31.6    -      -       +      -
    249A  LEU*     4.8     2.2    -      -       +      -
    209B  THR*     1.3    88.7    -      -       -      +
    211B  ILE*     1.3    61.5    +      -       -      +
    213B  ASP*     3.7     6.1    -      -       +      +
    214B  ALA*     3.3    19.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  MET*     3.6    39.9    -      -       +      -
    245A  TYR*     4.0    14.4    -      -       +      -
    248A  PHE*     3.8    17.7    -      -       +      -
    249A  LEU*     4.0    24.0    -      -       +      -
    252A  MET*     4.1    17.3    -      -       +      -
      6B  PHE*     3.5    35.0    -      -       +      -
    209B  THR*     3.1     7.0    +      -       -      +
    210B  PRO*     1.3    75.4    -      -       -      +
    212B  THR*     1.3    65.7    +      -       -      +
    214B  ALA*     3.4     3.3    +      -       -      +
    215B  CYS*     3.2    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  PHE*     4.7     4.7    -      -       +      -
    202B  ALA      4.9     3.3    +      -       -      -
    208B  ALA*     3.5     9.7    -      -       -      +
    209B  THR*     2.8    40.8    +      -       +      +
    211B  ILE*     1.3    76.0    -      -       -      +
    213B  ASP*     1.3    57.2    +      -       -      +
    215B  CYS*     4.5     1.3    -      -       -      -
    216B  ALA*     2.8    32.8    +      -       -      +
    252B  MET      4.1     2.2    -      -       -      +
    253B  ALA*     3.4    36.8    -      -       -      +
    256B  ASN*     3.8    22.4    -      -       +      -
    257B  ALA*     3.8    11.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  LYS*     4.7    10.2    +      -       -      +
    202B  ALA      4.9     0.2    -      -       -      +
    203B  TYR*     3.4    22.3    +      -       +      +
    208B  ALA*     3.6    11.6    -      -       -      +
    209B  THR      2.9    23.2    +      -       -      +
    210B  PRO*     3.7     8.7    -      -       +      +
    212B  THR*     1.3    78.5    +      -       -      +
    214B  ALA*     1.3    63.6    +      -       -      +
    216B  ALA*     3.7     1.0    -      -       -      +
    217B  LEU*     3.0    31.6    +      -       +      +
    299B  ARG*     2.4    40.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  ALA*     4.2    15.3    -      -       +      +
    215A  CYS*     5.5     0.9    -      -       -      -
    218A  LYS*     3.7    39.6    -      -       +      +
    249A  LEU*     5.0     4.7    -      -       +      -
    210B  PRO      3.3     7.3    +      -       -      +
    211B  ILE*     3.8     5.6    -      -       -      +
    212B  THR      3.3     0.2    -      -       -      -
    213B  ASP*     1.3    79.1    -      -       -      +
    215B  CYS*     1.3    64.2    +      -       -      +
    217B  LEU*     4.0     6.0    -      -       -      +
    218B  LYS*     3.1    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  ALA*     5.3     0.9    -      -       -      -
    215A  CYS*     5.0     9.4    -      -       -      -
    211B  ILE*     3.2    29.8    +      -       -      +
    212B  THR      3.8     2.9    -      -       -      +
    214B  ALA*     1.3    77.3    -      -       -      +
    216B  ALA*     1.3    61.8    +      -       -      +
    218B  LYS*     3.4     2.3    +      -       -      +
    219B  ALA*     2.9    30.3    +      -       -      +
    249B  LEU*     3.4    37.1    -      -       +      +
    252B  MET*     3.8    39.7    -      -       +      -
    253B  ALA      4.1     4.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199B  ALA*     3.5    35.0    -      -       -      +
    203B  TYR*     4.1    18.8    -      -       +      +
    212B  THR      2.8    18.8    +      -       -      +
    213B  ASP      3.7     3.6    -      -       -      +
    215B  CYS*     1.3    76.5    -      -       -      +
    217B  LEU*     1.3    58.5    +      -       -      +
    219B  ALA*     3.1     6.6    +      -       -      +
    220B  ALA*     2.9    25.9    +      -       -      +
    253B  ALA*     3.7    15.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  LYS*     6.2     2.0    -      -       -      +
    203B  TYR*     3.3    57.4    -      -       +      +
    213B  ASP*     3.0    17.4    +      -       +      +
    214B  ALA*     4.0     5.4    -      -       -      +
    216B  ALA*     1.3    77.6    -      -       -      +
    218B  LYS*     1.3    58.5    +      -       -      +
    220B  ALA*     3.4     3.3    +      -       +      +
    221B  SER*     3.0    28.6    +      -       -      -
    302B  ASP*     4.5     6.5    -      -       +      +
    303B  VAL*     4.2    23.1    -      -       +      +
    306B  ALA*     3.6    21.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  PRO*     3.4    24.8    -      -       -      +
    213A  ASP*     4.5    13.9    +      -       -      +
    214A  ALA*     3.7    21.3    -      -       +      +
    214B  ALA      3.1    19.8    +      -       -      +
    215B  CYS*     3.8     3.6    -      -       -      +
    216B  ALA      3.3     0.2    -      -       -      -
    217B  LEU*     1.3    72.8    -      -       -      +
    219B  ALA*     1.3    66.5    +      -       -      +
    221B  SER*     3.3    10.0    +      -       -      +
    222B  MET*     3.0    49.7    +      -       +      +
    249B  LEU*     3.5    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199B  ALA*     4.2     4.7    -      -       +      -
    215B  CYS      2.9    14.9    +      -       -      +
    216B  ALA      3.4     8.3    -      -       -      +
    218B  LYS*     1.3    76.3    -      -       -      +
    220B  ALA*     1.3    58.3    +      -       -      +
    222B  MET*     3.3     2.8    +      -       -      +
    223B  ILE*     2.9    38.3    +      -       +      +
    246B  ALA*     3.3    30.9    -      -       -      +
    249B  LEU*     4.0     4.6    -      -       +      +
    250B  ALA*     3.6    22.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196B  LEU*     4.1    19.0    -      -       +      +
    199B  ALA*     4.3     5.8    -      -       +      +
    216B  ALA      2.9    15.4    +      -       -      +
    217B  LEU*     3.7     7.2    -      -       -      +
    219B  ALA*     1.3    76.0    -      -       -      +
    221B  SER*     1.3    63.6    +      -       -      +
    223B  ILE*     3.8     1.1    -      -       -      +
    224B  ALA*     3.0    26.5    +      -       -      +
    303B  VAL*     3.8    31.6    -      -       +      +
    306B  ALA*     4.8     0.4    -      -       +      -
    307B  MET*     3.7    11.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  LEU      3.0    16.3    +      -       -      -
    218B  LYS*     3.6    13.9    +      -       -      +
    219B  ALA      3.3     0.2    -      -       -      -
    220B  ALA*     1.3    78.5    -      -       -      +
    222B  MET*     1.3    63.7    +      -       -      +
    224B  ALA*     3.6     1.9    +      -       -      +
    225B  LYS*     3.1    46.8    +      -       -      +
    306B  ALA*     3.0    29.9    +      -       -      +
    307B  MET*     4.4     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  PRO*     3.7    39.5    -      -       +      -
    218B  LYS*     3.0    28.6    +      -       +      +
    221B  SER*     1.3    75.1    -      -       -      +
    223B  ILE*     1.3    61.1    +      -       -      +
    225B  LYS*     3.2     4.1    +      -       -      +
    226B  ASN*     2.9    43.6    +      -       -      +
    242B  ALA*     3.4    35.9    -      -       +      +
    243B  MET*     5.1     0.4    -      -       -      -
    245B  TYR*     4.0     3.8    -      -       +      -
    246B  ALA*     3.7    18.4    -      -       +      -
    249B  LEU*     3.8    21.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192B  GLY      4.2     4.3    -      -       -      +
    195B  ALA*     3.8    16.6    -      -       +      +
    196B  LEU*     3.5    51.8    -      -       +      +
    219B  ALA*     2.9    28.9    +      -       +      +
    220B  ALA*     3.8     4.0    -      -       -      +
    222B  MET*     1.3    75.1    -      -       -      +
    224B  ALA*     1.3    67.3    +      -       -      +
    227B  LEU*     2.9    54.0    +      -       +      +
    228B  LYS      4.7     0.2    +      -       -      -
    243B  MET*     4.0    15.5    -      -       +      -
    246B  ALA*     3.9    15.0    -      -       +      -
    330B  LEU*     4.8     2.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220B  ALA      3.0    18.0    +      -       -      +
    221B  SER      3.9     2.7    -      -       -      +
    223B  ILE*     1.3    79.3    -      -       -      +
    225B  LYS*     1.3    61.7    -      -       +      +
    227B  LEU      5.1     0.3    +      -       -      -
    228B  LYS*     5.6     5.4    +      -       -      +
    307B  MET*     3.6    50.5    -      -       +      +
    330B  LEU*     5.0    10.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  SER*     3.1    36.3    +      -       -      +
    222B  MET*     3.2     6.8    +      -       +      +
    223B  ILE      3.0     0.8    -      -       -      -
    224B  ALA*     1.3    83.8    -      -       +      +
    226B  ASN*     1.3    68.5    +      -       -      +
    228B  LYS*     5.6     1.5    -      -       -      +
    229B  THR*     4.1    10.2    +      -       -      -
    306B  ALA      5.0     3.8    -      -       -      -
    307B  MET      5.6     5.2    -      -       -      +
    308B  GLY*     6.0     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222B  MET*     2.9    31.9    +      -       -      +
    225B  LYS*     1.3    89.6    -      -       -      +
    227B  LEU*     1.3    65.9    +      -       -      +
    228B  LYS      3.4     2.7    -      -       -      -
    229B  THR*     3.1    10.1    +      -       -      +
    230B  ALA*     2.8    23.2    +      -       -      +
    238B  PRO      4.7     0.9    -      -       -      +
    239B  ALA*     3.9    20.4    -      -       -      +
    242B  ALA*     3.3    35.0    -      -       +      +
    243B  MET*     4.2     7.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188B  THR*     3.7    28.5    -      -       +      +
    189B  ALA*     4.5     0.4    -      -       -      -
    192B  GLY*     3.8    23.8    -      -       -      -
    193B  MET*     4.1    10.3    -      -       -      +
    223B  ILE*     2.9    37.4    +      -       +      +
    226B  ASN*     1.3    71.1    -      -       -      +
    228B  LYS*     1.3    64.2    +      -       -      +
    230B  ALA*     3.1     2.3    +      -       -      +
    231B  CYS*     2.9    29.8    +      -       -      -
    243B  MET*     3.7    25.5    -      -       +      -
    330B  LEU*     4.5     9.2    -      -       +      -
    334B  ILE*     3.9    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223B  ILE      4.7     0.6    +      -       -      -
    224B  ALA      5.6     5.7    +      -       -      +
    225B  LYS      6.1     1.1    -      -       -      +
    226B  ASN      3.4     0.6    -      -       -      +
    227B  LEU*     1.3    77.1    -      -       -      +
    229B  THR*     1.3    58.7    +      -       -      +
    231B  CYS*     3.3     1.6    +      -       -      +
    232B  ASP*     2.7    77.5    +      -       -      +
    330B  LEU*     4.5    11.2    -      -       +      +
    333B  SER*     3.8    45.8    +      -       -      +
    334B  ILE*     4.2    13.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225B  LYS      4.1    12.0    +      -       -      -
    226B  ASN*     3.1    12.9    +      -       -      +
    228B  LYS*     1.3    78.5    -      -       -      +
    230B  ALA*     1.3    57.8    +      -       -      +
    232B  ASP*     3.4     6.3    +      -       -      +
    233B  ASN*     3.0    31.6    +      -       +      +
    236B  ASP*     3.1    28.3    -      -       +      +
    239B  ALA*     3.9     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188B  THR*     3.9    20.4    +      -       +      +
    226B  ASN      2.8    15.7    +      -       -      +
    227B  LEU      3.1     4.7    +      -       -      +
    229B  THR*     1.3    76.7    -      -       -      +
    231B  CYS*     1.3    63.6    +      -       -      +
    233B  ASN      3.5     5.8    -      -       -      -
    234B  GLY*     3.4    23.9    +      -       -      -
    239B  ALA*     4.1    14.1    -      -       +      -
    240B  ARG*     4.3    14.0    +      -       -      +
    243B  MET*     4.1    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185B  LYS*     3.5    41.9    -      -       +      +
    188B  THR*     3.7    10.3    -      -       -      -
    189B  ALA*     3.6    43.1    -      -       -      -
    227B  LEU*     2.9    23.9    +      -       -      +
    228B  LYS      3.6     4.7    -      -       -      +
    230B  ALA*     1.3    77.1    -      -       -      +
    232B  ASP*     1.3    66.3    +      -       -      +
    233B  ASN*     3.2     1.2    +      -       -      -
    234B  GLY      4.4     1.7    +      -       -      -
    334B  ILE*     3.8    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185B  LYS*     4.1    15.1    +      -       -      +
    228B  LYS*     2.7    60.9    +      -       -      +
    229B  THR*     3.9     5.8    -      -       -      +
    231B  CYS*     1.3    78.5    -      -       -      +
    233B  ASN*     1.3    60.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 233 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229B  THR*     3.0    15.4    +      -       +      +
    230B  ALA*     3.5     5.9    -      -       -      +
    231B  CYS      3.2     0.8    -      -       -      -
    232B  ASP*     1.3    81.8    -      -       +      +
    234B  GLY*     1.3    63.0    +      -       -      +
    235B  LYS*     3.1    25.0    +      -       -      +
    236B  ASP*     3.2    36.3    +      -       +      +
----------------------------------------------------------
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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