Contacts of the helix formed by residues 120 - 145 (chain F) in PDB entry 3BVI


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 LEU 120 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10F  LEU*     4.3    15.7    -      -       +      -
     57F  LEU*     4.4     1.6    -      -       +      -
    101F  ILE*     5.6     2.5    -      -       +      -
    104F  ILE*     3.6    32.5    -      -       +      -
    105F  VAL*     3.7    31.2    -      -       +      +
    108F  ALA*     5.3     0.2    -      -       +      -
    116F  THR*     3.0    31.5    +      -       +      +
    117F  PHE*     3.8     5.8    -      -       -      +
    118F  ASN      3.2     0.6    -      -       -      -
    119F  PHE*     1.3    93.9    -      -       +      +
    121F  GLN*     1.3    58.7    +      -       -      +
    122F  TRP      3.4     0.7    -      -       -      -
    123F  TYR*     2.9    47.9    +      -       +      +
    124F  VAL*     3.0    15.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 121 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105F  VAL*     4.4     8.9    -      -       -      +
    117F  PHE*     3.0    56.6    +      -       +      +
    118F  ASN*     3.6    17.7    -      -       -      +
    119F  PHE      3.2     2.0    -      -       -      -
    120F  LEU*     1.3    74.8    -      -       -      +
    122F  TRP*     1.3    67.3    +      -       -      +
    124F  VAL*     3.4    16.9    +      -       -      +
    125F  ALA*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 122 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53F  HIS*     3.8    32.1    -      +       -      -
     56F  LYS*     3.5    46.9    -      -       +      -
     57F  LEU*     4.8     2.9    -      -       +      -
    118F  ASN      4.8     0.6    +      -       -      -
    119F  PHE*     2.8    58.4    +      +       -      -
    121F  GLN*     1.3    76.6    -      -       -      +
    123F  TYR*     1.3    86.9    +      +       +      +
    125F  ALA*     3.4     5.2    +      -       -      +
    126F  GLU*     2.9    57.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 123 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13F  GLN*     3.0    32.1    +      -       +      +
     17F  GLU*     2.4    41.8    +      -       +      +
     53F  HIS*     4.0    16.4    -      +       +      -
     57F  LEU*     4.2    15.0    -      -       +      -
    101F  ILE*     3.7    31.8    -      -       +      +
    104F  ILE*     5.6     0.9    -      -       +      -
    120F  LEU*     2.9    32.8    +      -       +      +
    122F  TRP*     1.3   110.8    -      +       +      +
    124F  VAL*     1.3    64.2    +      -       -      +
    126F  GLU*     4.6     1.1    -      -       +      +
    127F  GLN*     2.9    30.1    +      -       +      +
   1006F   FE      3.9     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 124 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101F  ILE*     3.8    25.7    -      -       +      +
    102F  ASN*     5.0    11.2    -      -       -      +
    105F  VAL*     3.9    18.6    -      -       +      -
    120F  LEU      3.0    19.9    +      -       -      +
    121F  GLN*     3.7    20.0    -      -       -      +
    123F  TYR*     1.3    77.3    -      -       -      +
    125F  ALA*     1.3    57.7    +      -       -      +
    127F  GLN*     3.9     2.6    -      -       -      +
    128F  HIS*     3.0    30.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 125 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121F  GLN      3.0    17.3    +      -       -      +
    122F  TRP*     3.7     6.3    -      -       -      +
    124F  VAL*     1.3    78.0    -      -       -      +
    126F  GLU*     1.3    64.2    +      -       +      +
    128F  HIS*     3.3     7.5    +      -       -      +
    129F  GLU*     3.2    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 126 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49F  GLU*     4.0     8.1    -      -       -      +
     53F  HIS*     3.5    27.9    +      -       +      +
     56F  LYS*     4.6    10.0    +      -       -      -
    122F  TRP*     2.9    44.8    +      -       +      +
    123F  TYR*     4.2     1.8    -      -       -      +
    125F  ALA*     1.3    77.0    -      -       +      +
    127F  GLN*     1.3    57.7    +      -       -      +
    129F  GLU*     3.4    16.2    +      -       -      +
    130F  GLU*     3.0    35.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 127 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53F  HIS*     5.4     1.3    -      -       -      -
     94F  GLU*     2.9    33.1    +      -       -      +
     97F  ILE*     3.7     9.6    -      -       -      +
     98F  SER*     2.9    32.7    +      -       -      +
    101F  ILE*     3.4    25.4    -      -       +      -
    123F  TYR*     2.9    20.0    +      -       +      +
    124F  VAL*     4.0     3.4    -      -       -      +
    126F  GLU*     1.3    75.5    -      -       -      +
    128F  HIS*     1.3    59.2    +      -       -      +
    130F  GLU*     3.2     4.3    +      -       -      +
    131F  GLU*     2.9    26.9    +      -       -      +
   1006F   FE      2.8    13.9    -      -       -      -
   1007F   FE      2.5    26.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 128 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98F  SER*     5.1     0.4    -      -       -      -
    124F  VAL*     3.0    20.9    +      -       +      +
    125F  ALA*     3.3     6.7    +      -       -      +
    127F  GLN*     1.3    76.7    -      -       -      +
    129F  GLU*     1.3    58.0    +      -       -      +
    131F  GLU*     3.2    18.5    +      -       -      +
    132F  VAL*     3.0    51.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 129 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125F  ALA      3.2     9.5    +      -       -      +
    126F  GLU*     3.5    20.6    -      -       -      +
    128F  HIS*     1.3    82.0    -      -       -      +
    130F  GLU*     1.3    56.8    +      -       +      +
    132F  VAL*     3.5     7.2    +      -       -      +
    133F  LEU*     3.0    28.2    +      -       +      +
    165F  ARG*     4.0    29.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 130 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46F  HIS*     3.4    19.5    -      -       +      +
     49F  GLU*     3.7    12.3    -      -       -      +
     50F  GLU*     2.9    13.7    -      -       -      +
     53F  HIS*     2.9    25.8    +      -       -      -
     94F  GLU*     4.1     4.0    -      -       -      +
    126F  GLU*     3.0    19.4    +      -       -      +
    127F  GLN*     3.5     8.3    -      -       -      +
    129F  GLU*     1.3    73.5    -      -       +      +
    131F  GLU*     1.3    65.2    +      -       -      +
    133F  LEU*     3.3     9.3    +      -       +      +
    134F  PHE*     3.1    31.3    +      -       -      -
    165F  ARG*     5.1    12.0    +      -       -      +
   1006F   FE      3.3     4.2    -      -       -      -
   1007F   FE      2.3    36.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 131 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91F  TYR*     3.6    21.6    +      -       +      -
     94F  GLU*     4.2    10.6    +      -       +      -
     95F  GLN*     3.5    32.2    -      -       -      +
     98F  SER*     2.5    37.0    +      -       -      +
    127F  GLN*     2.9    20.8    +      -       -      +
    128F  HIS*     3.6    18.2    +      -       -      +
    130F  GLU*     1.3    73.2    -      -       -      +
    132F  VAL*     1.3    62.7    +      -       +      +
    134F  PHE*     3.4     0.7    +      -       -      -
    135F  LYS*     3.1    22.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 132 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128F  HIS*     3.0    48.6    +      -       +      +
    129F  GLU*     3.7     7.6    -      -       -      +
    131F  GLU*     1.3    71.7    -      -       +      +
    133F  LEU*     1.3    62.0    +      -       -      +
    135F  LYS*     3.2    24.6    +      -       -      +
    136F  ASP*     2.8    43.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 133 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42F  PHE*     3.8    27.1    -      -       +      -
     46F  HIS*     6.2     1.1    -      -       -      +
    129F  GLU*     3.0    17.7    +      -       +      +
    130F  GLU*     3.3     9.8    +      -       +      +
    132F  VAL*     1.3    77.8    -      -       -      +
    134F  PHE*     1.3    59.7    +      -       +      +
    136F  ASP*     3.2    12.7    +      -       +      +
    137F  ILE*     2.9    40.2    +      -       +      +
    161F  ILE*     3.9    25.8    -      -       +      -
    165F  ARG*     3.6    42.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 134 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24F  TYR*     3.9     7.2    -      +       -      -
     42F  PHE*     3.7    30.3    -      +       -      -
     43F  LEU*     4.1     3.8    -      -       +      -
     46F  HIS*     3.4    49.1    -      +       -      -
     87F  PHE*     3.9    20.1    -      +       -      +
     90F  ALA*     3.6    33.4    -      -       +      -
     91F  TYR*     4.2    20.1    -      -       +      +
     94F  GLU*     3.9    13.2    -      -       +      -
    130F  GLU*     3.1    29.9    +      -       +      +
    131F  GLU      3.9     4.0    -      -       -      +
    132F  VAL      3.3     0.2    -      -       -      -
    133F  LEU*     1.3    76.9    -      -       +      +
    135F  LYS*     1.3    61.6    +      -       -      +
    137F  ILE*     4.0     4.3    -      -       -      +
    138F  LEU*     2.9    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 135 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91F  TYR*     3.6    36.0    -      -       +      +
    131F  GLU      3.1    13.7    +      -       -      +
    132F  VAL*     3.3    26.7    -      -       -      +
    134F  PHE*     1.3    77.6    -      -       -      +
    136F  ASP*     1.3    80.9    +      -       -      +
    138F  LEU*     3.7     3.5    -      -       -      +
    139F  ASP*     3.0    48.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 136 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132F  VAL*     2.8    27.6    +      -       -      +
    133F  LEU*     3.4    16.1    -      -       +      +
    135F  LYS*     1.3   104.1    +      -       -      +
    137F  ILE*     1.3    61.8    +      -       +      +
    139F  ASP*     3.5     8.1    +      -       -      +
    140F  LYS*     3.1    29.8    +      -       -      +
    157F  TYR*     5.0     6.8    +      -       -      +
    161F  ILE*     6.3     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 137 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42F  PHE*     3.3    46.2    -      -       +      -
     87F  PHE*     3.6    18.6    -      -       +      -
    133F  LEU*     2.9    29.0    +      -       +      +
    134F  PHE*     4.0     3.8    -      -       -      +
    136F  ASP*     1.3    73.1    -      -       +      +
    138F  LEU*     1.3    58.2    +      -       -      +
    140F  LYS*     3.2     5.8    +      -       -      +
    141F  ILE*     2.8    49.6    +      -       +      +
    157F  TYR*     4.8     3.6    -      -       +      -
    158F  VAL*     3.8    18.8    -      -       +      -
    161F  ILE*     3.9    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 138 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84F  THR*     4.3    10.1    -      -       +      +
     87F  PHE*     3.9    19.2    -      -       +      +
     88F  GLN*     3.7    37.9    -      -       +      +
     91F  TYR*     4.0    25.8    -      -       +      -
    134F  PHE      2.9    19.0    +      -       -      +
    135F  LYS      3.7     4.7    -      -       -      +
    137F  ILE*     1.3    76.2    -      -       -      +
    139F  ASP*     1.3    64.6    +      -       -      +
    141F  ILE*     3.3     8.7    +      -       +      +
    142F  GLU*     3.0    52.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 139 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135F  LYS*     3.0    39.8    +      -       -      +
    136F  ASP*     3.5     8.9    -      -       -      +
    138F  LEU*     1.3    76.2    -      -       -      +
    140F  LYS*     1.3    59.0    +      -       -      +
    142F  GLU*     3.4    17.7    +      -       -      +
    143F  LEU*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 140 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136F  ASP      3.1    16.7    +      -       -      +
    137F  ILE      3.2     4.2    +      -       -      +
    139F  ASP*     1.3    75.0    -      -       -      +
    141F  ILE*     1.3    60.9    +      -       -      +
    143F  LEU*     3.3    27.7    +      -       +      +
    144F  ILE*     2.9    48.0    +      -       +      +
    157F  TYR*     3.5    55.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 141 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83F  LEU*     4.1    27.8    -      -       +      +
     84F  THR*     3.3    33.3    +      -       +      +
     87F  PHE*     3.5    40.6    -      -       +      -
    137F  ILE*     2.8    34.9    +      -       +      +
    138F  LEU*     3.7     6.1    -      -       +      +
    140F  LYS*     1.3    77.0    -      -       +      +
    142F  GLU*     1.3    56.3    +      -       -      +
    144F  ILE*     4.0     1.2    -      -       -      +
    145F  GLY*     3.1    27.2    +      -       -      +
    151F  LEU*     6.1     0.7    -      -       +      -
    154F  ALA*     4.4    16.6    -      -       +      +
    157F  TYR*     6.3     0.7    -      -       +      -
    158F  VAL*     5.0     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 142 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84F  THR*     4.9    10.5    -      -       +      -
     88F  GLN*     4.4     9.4    -      -       -      +
    138F  LEU*     3.0    47.1    +      -       +      +
    139F  ASP*     3.6    23.0    -      -       -      +
    141F  ILE*     1.3    72.6    -      -       -      +
    143F  LEU*     1.3    65.2    +      -       -      +
    145F  GLY*     3.6    10.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 143 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139F  ASP      2.9    18.3    +      -       -      +
    140F  LYS*     3.3    34.7    +      -       +      +
    142F  GLU*     1.3    77.7    -      -       -      +
    144F  ILE*     1.3    64.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 144 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140F  LYS*     2.9    39.2    +      -       +      +
    141F  ILE      4.0     2.5    -      -       -      +
    143F  LEU*     1.3    80.8    -      -       +      +
    145F  GLY*     1.3    64.6    +      -       -      +
    147F  GLU*     4.6     8.8    -      -       -      +
    150F  GLY*     3.2    33.6    -      -       -      +
    153F  LEU*     4.1    19.1    -      -       +      +
    154F  ALA*     3.6    30.1    -      -       +      +
    157F  TYR*     4.8     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 145 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141F  ILE      3.1    17.6    +      -       -      +
    142F  GLU*     3.6     8.2    +      -       -      -
    143F  LEU      3.5     2.0    -      -       -      -
    144F  ILE*     1.3    85.3    -      -       -      +
    146F  ASN*     1.3    61.5    +      -       -      +
    147F  GLU*     3.6     9.2    -      -       -      -
    150F  GLY*     3.3    17.2    -      -       -      -
    151F  LEU*     4.9     0.2    -      -       -      -
    154F  ALA*     5.4     1.0    -      -       -      +
----------------------------------------------------------
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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