Contacts of the helix formed by residues 216 - 242 (chain B) in PDB entry 5MKE


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 TYR 216 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215B  LYS*     1.3    88.5    -      -       +      +
    217B  LEU*     1.3    53.8    +      -       +      +
    219B  SER*     2.6    19.2    +      -       -      -
    220B  VAL*     2.6    47.5    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    215B  LYS*     3.1    34.1    -      -       +      +
    216B  TYR*     1.3    77.9    -      -       +      +
    218B  LYS*     1.3    56.1    +      -       -      +
    220B  VAL*     4.3     9.2    -      -       +      -
    221B  LEU*     3.2    34.6    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    215B  LYS      2.8    27.1    +      -       -      +
    217B  LEU*     1.3    73.9    -      -       -      +
    219B  SER*     1.3    57.9    +      -       -      +
    222B  ARG*     3.1    46.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215B  LYS      3.0     6.0    +      -       -      -
    216B  TYR*     2.6    34.6    +      -       -      -
    218B  LYS*     1.3    75.1    -      -       -      +
    220B  VAL*     1.3    64.3    +      -       -      -
    222B  ARG*     3.5     4.1    -      -       -      +
    223B  GLU*     3.3    19.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216B  TYR*     2.6    38.5    +      -       +      +
    217B  LEU*     4.3    11.9    -      -       +      -
    219B  SER*     1.3    72.0    -      -       -      +
    221B  LEU*     1.3    63.8    +      -       +      +
    223B  GLU*     2.8    21.0    +      -       +      +
    224B  LEU*     2.3    57.0    +      -       +      +
    579B  PHE*     6.1     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  LEU*     3.2    26.3    +      -       +      +
    219B  SER      3.6     0.2    -      -       -      -
    220B  VAL*     1.3    82.4    -      -       +      +
    222B  ARG*     1.3    52.9    +      -       -      +
    224B  LEU*     3.3    19.0    -      -       +      +
    225B  VAL*     2.3    58.7    +      -       +      +
    228B  LEU*     5.6     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  LYS*     3.1    40.9    +      -       +      +
    219B  SER*     3.5     5.8    -      -       -      +
    220B  VAL      3.1     0.2    -      -       -      -
    221B  LEU*     1.3    76.7    -      -       -      +
    223B  GLU*     1.3    63.6    +      -       +      +
    225B  VAL*     3.1    19.0    -      -       -      +
    226B  THR*     3.0    53.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  SER      3.3     5.6    +      -       -      +
    220B  VAL*     2.8    36.7    +      -       +      +
    222B  ARG*     1.3    75.8    -      -       -      +
    224B  LEU*     1.3    56.2    +      -       +      +
    226B  THR*     2.1    36.3    +      -       +      +
    227B  TYR*     2.6    61.3    +      -       +      -
    487B  TYR*     4.7     7.6    -      -       +      +
    490B  GLU*     5.4     1.6    -      -       -      +
    576B  PHE*     5.5     1.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220B  VAL*     2.3    51.5    +      -       +      +
    221B  LEU*     3.3    29.4    -      -       +      +
    223B  GLU*     1.3    68.9    -      -       +      +
    225B  VAL*     1.3    50.6    +      -       -      +
    227B  TYR*     2.9    10.0    +      -       +      +
    228B  LEU*     2.4    46.8    +      -       +      +
    576B  PHE*     3.5    52.7    -      -       +      -
    579B  PHE*     4.5    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  LEU*     2.3    54.5    +      -       +      +
    222B  ARG*     3.1    23.1    -      -       -      +
    224B  LEU*     1.3    67.9    -      -       -      +
    226B  THR*     1.3    53.4    +      -       +      +
    228B  LEU*     2.9    16.7    +      -       +      +
    229B  LEU*     2.6    58.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222B  ARG*     3.0    34.7    +      -       -      +
    223B  GLU*     2.1    40.2    +      -       +      +
    225B  VAL*     1.3    72.5    -      -       +      +
    227B  TYR*     1.3    54.5    +      -       -      -
    229B  LEU*     4.9     2.5    -      -       -      -
    230B  PHE*     2.8    38.5    +      -       -      +
    483B  PHE*     3.5    21.1    -      -       +      -
    487B  TYR*     2.7    27.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223B  GLU*     2.6    77.3    +      -       +      -
    224B  LEU*     3.2    11.7    -      -       +      +
    226B  THR*     1.3    73.8    +      -       -      +
    228B  LEU*     1.3    64.6    +      -       +      +
    230B  PHE*     5.0     3.3    -      -       -      -
    231B  LEU*     3.0    27.9    +      -       -      +
    487B  TYR*     4.3    22.7    -      +       -      -
    490B  GLU*     5.5     0.3    +      -       -      -
    491B  GLU*     5.3     4.5    +      -       -      -
    572B  LYS*     3.3    38.4    +      -       +      -
    576B  PHE*     3.2    34.8    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    221B  LEU*     5.6     4.5    -      -       +      -
    224B  LEU*     2.4    37.0    +      -       +      +
    225B  VAL*     2.9    30.4    +      -       +      +
    227B  TYR*     1.3    68.8    -      -       +      +
    229B  LEU*     1.3    70.1    +      -       +      +
    231B  LEU*     3.0    23.4    -      -       +      +
    232B  ILE*     3.0    15.0    -      -       +      +
    576B  PHE*     6.4     2.2    -      -       +      -
   1006B  CHS      5.1     8.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225B  VAL*     2.6    42.5    +      -       +      +
    226B  THR*     4.4     2.7    -      -       -      +
    228B  LEU*     1.3    77.4    -      -       +      +
    230B  PHE*     1.3    56.0    +      -       -      +
    231B  LEU      2.9     4.0    -      -       -      -
    232B  ILE*     2.7    38.5    +      -       +      +
    233B  VAL*     3.2    13.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226B  THR*     2.8    22.6    +      -       -      +
    227B  TYR*     5.5     2.5    -      -       -      -
    229B  LEU*     1.3    73.9    -      -       -      +
    231B  LEU*     1.3    63.8    +      -       -      +
    233B  VAL*     3.2    31.1    +      -       +      +
    234B  LEU*     3.4    43.4    +      -       +      +
    480B  PHE*     3.5    16.2    -      -       +      -
    483B  PHE*     3.4    33.4    -      +       +      -
    484B  ILE*     3.3    42.6    -      -       +      -
    487B  TYR*     5.0     5.8    -      +       -      -
    514B  ILE*     6.2     4.0    -      -       +      -
    569B  VAL*     5.5     7.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227B  TYR      3.0    18.4    +      -       -      +
    228B  LEU*     3.0    20.0    -      -       +      +
    229B  LEU      2.9     0.8    +      -       -      -
    230B  PHE*     1.3    81.1    -      -       -      +
    232B  ILE*     1.3    64.1    +      -       +      +
    233B  VAL      3.1     0.2    +      -       -      -
    234B  LEU*     3.6     2.8    +      -       -      +
    235B  CYS*     3.1    31.5    +      -       -      -
    569B  VAL*     5.3    19.3    -      -       +      +
    570B  TRP*     4.3    20.6    -      -       +      +
    573B  LEU*     4.2    29.2    -      -       +      +
   1006B  CHS      3.6    41.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228B  LEU*     3.0    29.4    -      -       +      +
    229B  LEU*     2.7    24.0    +      -       +      +
    231B  LEU*     1.3    72.6    -      -       +      +
    233B  VAL*     1.3    49.3    +      -       -      +
    235B  CYS      3.1     0.2    +      -       -      -
    236B  ILE*     2.2    66.3    +      -       +      +
   1006B  CHS      3.4    64.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 233 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    229B  LEU*     3.2     8.0    +      -       +      +
    230B  PHE*     3.3    44.6    -      -       +      +
    231B  LEU      3.1     0.6    -      -       -      -
    232B  ILE*     1.3    74.0    -      -       +      +
    234B  LEU*     1.3    61.9    +      -       +      +
    236B  ILE*     2.8    16.3    +      -       +      +
    237B  LEU*     2.7    28.8    +      -       +      +
    476B  CYS*     4.1    29.3    -      -       +      +
    479B  ILE*     6.3     1.6    -      -       +      -
    480B  PHE*     4.4    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 234 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    230B  PHE*     3.4    44.8    +      -       +      +
    231B  LEU      4.4     4.3    -      -       -      +
    233B  VAL*     1.3    77.8    -      -       -      +
    235B  CYS*     1.3    58.3    +      -       -      +
    237B  LEU*     3.2    26.0    +      -       +      +
    238B  THR*     2.8    37.5    +      -       +      +
    480B  PHE*     4.8    13.5    -      -       +      -
    484B  ILE*     5.6     0.4    -      -       +      -
    565B  THR*     5.8     2.2    -      -       -      +
    566B  VAL*     5.7     9.0    -      -       +      -
    569B  VAL*     4.7    24.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 235 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231B  LEU*     3.1    34.3    +      -       -      -
    232B  ILE      3.1     8.2    +      -       -      +
    234B  LEU*     1.3    75.9    -      -       -      +
    236B  ILE*     1.3    51.4    +      -       -      +
    238B  THR*     2.4    10.5    +      -       -      -
    239B  TYR*     2.3    41.8    +      -       +      +
    566B  VAL*     5.8     2.5    -      -       -      -
    569B  VAL*     6.5     0.4    -      -       -      -
    570B  TRP*     4.5     4.5    -      -       -      -
   1005B  CHS      6.5     0.4    -      -       -      -
   1006B  CHS      3.2    32.5    -      -       -      +
    613C  GLN*     4.3    20.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 236 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232B  ILE*     2.2    60.7    +      -       +      +
    233B  VAL*     2.8    10.9    +      -       +      +
    235B  CYS*     1.3    65.7    -      -       -      +
    237B  LEU*     1.3    56.3    +      -       +      +
    239B  TYR*     3.9    11.4    -      -       +      -
    240B  GLY*     2.2    40.8    +      -       -      +
    472B  PHE      5.7     2.9    -      -       -      +
    473B  LEU*     6.0     2.9    -      -       +      -
    476B  CYS*     4.5    17.5    -      -       -      -
   1006B  CHS      4.4     7.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 237 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233B  VAL      2.7    17.1    +      -       -      +
    234B  LEU*     3.3    28.3    -      -       +      +
    236B  ILE*     1.3    72.1    -      -       +      +
    238B  THR*     1.3    55.6    +      -       -      +
    240B  GLY*     4.7     0.4    -      -       -      -
    241B  MET*     2.2    59.2    +      -       +      +
    461B  LYS*     5.1     0.7    -      -       -      +
    464B  ARG*     3.7    27.1    -      -       -      +
    473B  LEU*     4.2    24.0    -      -       +      +
    476B  CYS*     4.3    12.3    -      -       -      -
    477B  GLU*     4.9     0.2    -      -       +      -
    480B  PHE*     3.5    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 238 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    234B  LEU*     2.8    22.0    +      -       +      +
    235B  CYS*     2.4    28.1    +      -       -      -
    237B  LEU*     1.3    70.9    -      -       -      +
    239B  TYR*     1.3    57.1    +      -       -      +
    241B  MET*     3.4    20.8    -      -       +      +
    242B  MET*     2.7    37.6    +      -       -      +
    562B  ALA*     6.5     1.6    -      -       +      -
    566B  VAL*     5.0     8.5    -      -       +      -
    616C  TYR*     5.6     5.2    -      -       -      -
    617C  LEU*     4.6    28.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 239 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235B  CYS*     2.3    33.1    +      -       +      +
    236B  ILE*     3.6     9.0    -      -       +      +
    238B  THR*     1.3    68.4    +      -       -      -
    240B  GLY*     1.3    62.7    +      -       -      +
    242B  MET      2.8    22.1    -      -       -      +
    243B  SER*     3.6    10.9    +      -       -      -
    244B  SER      6.2     0.9    -      -       -      -
   1005B  CHS      3.9    33.0    -      -       +      +
   1006B  CHS      3.3    43.0    +      -       -      +
    616C  TYR*     6.4     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 240 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236B  ILE*     2.2    29.7    +      -       -      -
    237B  LEU*     2.9     0.6    +      -       -      -
    239B  TYR*     1.3    73.3    -      -       -      +
    241B  MET*     1.3    65.2    +      -       -      +
    242B  MET*     3.1     3.4    +      -       -      -
    243B  SER*     4.4     2.1    +      -       -      -
    473B  LEU*     5.7     9.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 241 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    237B  LEU*     2.2    65.5    +      -       +      +
    238B  THR*     3.4    18.6    -      -       +      +
    240B  GLY      1.3    67.8    -      -       -      +
    242B  MET*     1.3    93.4    +      -       +      +
    243B  SER      4.1     0.7    +      -       -      -
    246B  VAL*     5.1     0.2    -      -       -      +
    433B  ILE*     6.0     0.3    -      -       -      +
    435B  LEU*     4.1     8.7    -      -       -      +
    461B  LYS*     3.3    58.6    -      -       +      +
    473B  LEU*     5.6     9.0    -      -       +      +
    558B  PHE*     5.4    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 242 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    238B  THR*     2.7    27.2    +      -       -      +
    239B  TYR*     2.8    16.1    -      -       -      +
    241B  MET*     1.3   125.5    -      -       +      +
    243B  SER*     1.3    65.1    +      -       -      +
    246B  VAL*     4.1    17.3    -      -       +      -
    435B  LEU*     3.7    22.0    -      -       +      -
    459B  PRO*     5.6     8.7    -      -       +      +
    460B  LEU*     5.2     2.7    -      -       -      -
    461B  LYS*     4.5    18.4    -      -       +      +
    555B  GLN*     5.6     7.4    -      -       -      +
    559B  ASN*     5.5     9.9    -      -       -      +
    616C  TYR*     4.0    15.3    +      -       +      +
----------------------------------------------------------
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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