Contacts of the helix formed by residues 147 - 172 (chain C) in PDB entry 4AY1


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with PRO 147 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144C  TRP*     3.4    25.8    -      -       +      +
    146C  TYR*     1.3    90.0    -      -       +      +
    148C  ASP*     1.3    71.0    +      -       -      +
    150C  LYS*     4.0     1.4    +      -       -      +
    151C  GLU*     3.0    42.8    +      -       +      +
    155C  PHE*     3.7    32.5    -      -       +      -
    194C  SER*     3.8    22.7    -      -       -      +
    195C  TYR*     4.1    17.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 148 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146C  TYR*     3.3     6.3    -      -       +      +
    147C  PRO*     1.3    82.8    -      -       -      +
    149C  GLN*     1.3    76.2    +      -       -      +
    150C  LYS*     4.4     4.9    -      -       +      +
    152C  ASN*     3.0    13.5    +      -       -      +
    190C  MET*     3.5    25.7    -      -       -      +
    193C  ASN*     2.8    39.9    +      -       -      +
    194C  SER*     2.8    23.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 149 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148C  ASP*     1.3    86.0    +      -       -      +
    150C  LYS*     1.3    65.0    +      -       -      +
    151C  GLU      3.3     0.5    +      -       -      -
    152C  ASN*     3.5    11.8    +      -       -      +
    153C  THR      5.0     0.3    +      -       -      -
    193C  ASN*     3.6    42.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 150 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112C  HIS*     6.3     1.6    -      -       -      -
    147C  PRO      4.6     1.6    -      -       -      +
    148C  ASP*     3.3     4.0    -      -       +      +
    149C  GLN*     1.3    80.4    -      -       -      +
    151C  GLU*     1.3    79.4    +      -       +      +
    152C  ASN      3.9     0.3    +      -       -      -
    153C  THR*     5.0     3.1    +      -       -      -
    154C  HIS*     5.2     3.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 151 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  SER*     4.2    13.6    -      -       -      +
    112C  HIS*     2.3    35.0    +      -       -      -
    144C  TRP*     3.5    27.2    -      -       +      -
    147C  PRO*     3.0    22.5    +      -       +      +
    150C  LYS*     1.3    95.9    -      -       +      +
    152C  ASN*     1.3    67.5    +      -       -      +
    153C  THR      3.2     2.7    -      -       -      +
    154C  HIS*     2.9    36.2    +      -       -      +
    155C  PHE*     2.9    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 152 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147C  PRO*     4.2     1.6    -      -       -      -
    148C  ASP      3.0    17.4    +      -       -      +
    149C  GLN*     3.5    11.0    +      -       -      +
    151C  GLU*     1.3    78.7    -      -       -      +
    153C  THR*     1.3    64.5    +      -       -      +
    155C  PHE*     3.3     2.1    +      -       -      +
    156C  THR*     3.1    20.1    +      -       -      -
    192C  ASP      4.6     2.6    +      -       -      -
    193C  ASN      3.0    20.5    +      -       -      +
    194C  SER      3.3    26.1    -      -       -      +
    195C  TYR      3.5     9.7    +      -       -      +
    196C  GLN*     2.5    38.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 153 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149C  GLN      5.0     0.2    +      -       -      -
    150C  LYS      5.0     3.7    +      -       -      -
    151C  GLU      3.2     0.8    -      -       -      -
    152C  ASN*     1.3    82.3    +      -       -      +
    154C  HIS*     1.3    63.2    +      -       +      +
    156C  THR*     3.2     2.3    +      -       -      -
    157C  VAL*     2.9    47.6    +      -       +      +
    196C  GLN*     4.3    11.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 154 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112C  HIS*     4.3     1.6    -      +       -      -
    115C  VAL*     3.5    38.6    +      -       +      +
    116C  ASP*     3.2    29.8    +      -       -      -
    121C  ARG*     4.8     6.7    +      -       -      -
    144C  TRP*     4.2     5.7    -      -       +      -
    150C  LYS      5.2     2.7    +      -       -      -
    151C  GLU*     2.9    36.3    +      -       -      +
    153C  THR*     1.3    84.0    -      -       +      +
    155C  PHE*     1.3    57.7    +      -       -      +
    157C  VAL*     3.6     6.5    +      -       +      +
    158C  LEU*     2.9    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 155 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142C  VAL*     4.1    12.1    -      -       +      -
    144C  TRP*     3.6    43.2    -      +       +      -
    147C  PRO*     3.7    22.7    -      -       +      -
    151C  GLU      2.9    15.3    +      -       -      +
    152C  ASN      3.6     3.4    -      -       -      +
    154C  HIS*     1.3    75.4    -      -       -      +
    156C  THR*     1.3    69.5    +      -       -      +
    158C  LEU*     3.3     3.7    +      -       +      +
    159C  ILE*     3.0    53.3    +      -       +      +
    182C  ALA*     4.3    17.9    -      -       +      -
    183C  GLY      5.7     0.9    -      -       -      -
    184C  VAL*     5.1     1.8    -      -       +      -
    194C  SER      4.6     3.6    -      -       -      -
    195C  TYR*     3.8    30.1    -      +       -      -
    200C  LEU*     3.9    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 156 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152C  ASN*     3.1    13.2    +      -       -      -
    153C  THR*     3.6     7.4    -      -       -      -
    155C  PHE*     1.3    86.3    -      -       -      +
    157C  VAL*     1.3    66.6    +      -       +      +
    159C  ILE*     3.9     4.3    -      -       -      +
    160C  HIS*     3.0    26.0    +      -       +      +
    195C  TYR*     5.5     0.2    -      -       -      -
    196C  GLN*     3.2    42.1    +      -       -      +
    199C  LYS*     4.4    28.3    -      -       +      +
    200C  LEU*     5.0     7.1    -      -       +      +
    203C  ASP*     4.8     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 157 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  ARG*     3.8    20.4    -      -       -      +
    153C  THR*     2.9    35.9    +      -       +      +
    154C  HIS*     3.9     7.0    -      -       +      +
    156C  THR*     1.3    78.7    -      -       +      +
    158C  LEU*     1.3    62.0    +      -       -      +
    160C  HIS*     3.3     5.4    +      -       +      +
    161C  GLU*     2.9    49.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 158 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111C  PHE*     4.3    17.5    -      -       +      -
    114C  MET*     4.1    35.0    -      -       +      -
    115C  VAL*     4.3    11.2    -      -       +      -
    121C  ARG*     4.5    16.5    -      -       +      +
    124C  PHE*     4.2    14.1    -      -       +      -
    125C  ILE*     4.7     7.2    -      -       +      -
    142C  VAL*     4.6    10.8    -      -       +      -
    144C  TRP*     4.5     7.2    -      -       +      -
    154C  HIS      2.9    19.3    +      -       -      +
    155C  PHE*     3.3     4.5    +      -       +      +
    157C  VAL*     1.3    75.9    -      -       -      +
    159C  ILE*     1.3    59.5    +      -       +      +
    161C  GLU*     3.2     3.1    +      -       -      +
    162C  LEU*     2.9    53.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 159 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142C  VAL*     4.1    26.7    -      -       +      -
    155C  PHE*     3.0    55.7    +      -       +      +
    156C  THR      3.9     2.9    -      -       -      +
    158C  LEU*     1.3    78.2    -      -       +      +
    160C  HIS*     1.3    57.3    +      -       -      +
    162C  LEU*     3.3     9.0    +      -       +      +
    163C  ALA*     2.9    27.9    +      -       -      +
    180C  LEU*     3.6     6.4    -      -       +      +
    182C  ALA*     5.2     0.9    -      -       +      -
    200C  LEU*     4.1    13.9    -      -       +      -
    203C  ASP*     3.5    25.1    -      -       +      +
    204C  LEU*     3.7    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 160 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156C  THR*     3.0    22.1    +      -       +      +
    157C  VAL*     3.7     6.1    -      -       +      +
    158C  LEU      3.3     0.2    -      -       -      -
    159C  ILE*     1.3    75.5    -      -       -      +
    161C  GLU*     1.3    66.1    +      -       +      +
    163C  ALA*     3.3     2.8    +      -       -      +
    164C  GLU*     2.9    66.1    +      -       +      +
    199C  LYS*     6.3     1.0    -      -       -      +
    203C  ASP*     3.4    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 161 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118C  SER*     5.5     2.2    -      -       -      +
    121C  ARG*     2.9    47.0    +      -       -      +
    122C  LEU      5.3     0.3    +      -       -      -
    125C  ILE*     3.5    18.1    -      -       +      +
    157C  VAL*     2.9    34.5    +      -       +      +
    158C  LEU      3.9     1.8    -      -       -      +
    160C  HIS*     1.3    80.0    -      -       +      +
    162C  LEU*     1.3    65.1    +      -       -      +
    164C  GLU*     3.6     7.6    -      -       +      +
    165C  ALA*     3.0    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 162 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  PHE*     4.6     6.7    -      -       +      -
    125C  ILE*     3.8    27.3    -      -       +      +
    128C  ILE*     4.3     6.5    -      -       +      -
    140C  LEU*     3.9    24.2    -      -       +      -
    142C  VAL*     4.0    13.9    -      -       +      -
    158C  LEU*     2.9    39.5    +      -       +      +
    159C  ILE*     3.6     7.2    -      -       -      +
    161C  GLU*     1.3    78.4    -      -       -      +
    163C  ALA*     1.3    56.3    +      -       -      +
    165C  ALA*     3.3     2.6    +      -       -      -
    166C  PHE*     2.9    62.0    +      -       +      -
    180C  LEU*     3.9    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 163 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159C  ILE      2.9    17.9    +      -       -      +
    160C  HIS      3.6     4.7    -      -       -      +
    162C  LEU*     1.3    77.3    -      -       -      +
    164C  GLU*     1.3    63.2    +      -       +      +
    166C  PHE*     3.3     6.2    +      -       -      +
    167C  GLN*     3.0    24.5    +      -       -      +
    177C  ARG*     5.6     0.5    -      -       -      -
    180C  LEU*     3.7     7.8    -      -       +      +
    203C  ASP*     3.7    39.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 164 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  HIS*     2.9    60.8    +      -       +      +
    161C  GLU*     3.6     8.3    -      -       +      +
    163C  ALA*     1.3    77.4    -      -       -      +
    165C  ALA*     1.3    57.7    +      -       -      +
    167C  GLN*     3.2     7.8    +      -       -      +
    168C  LYS*     2.8    30.0    +      -       -      +
    203C  ASP*     5.4     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 165 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125C  ILE*     3.4    33.0    -      -       +      -
    126C  ASN*     6.0     0.4    -      -       -      +
    129C  ILE*     3.8    12.1    -      -       +      +
    161C  GLU      3.0    13.5    +      -       -      +
    162C  LEU      3.8     2.0    -      -       -      +
    164C  GLU*     1.3    73.7    -      -       -      +
    166C  PHE*     1.3    61.5    +      -       -      +
    168C  LYS*     3.8     7.1    -      -       -      +
    169C  ASP*     2.8    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 166 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128C  ILE*     3.7    24.9    -      -       +      -
    129C  ILE*     3.7    28.7    -      -       +      -
    132C  LEU*     4.1     9.6    -      -       +      -
    140C  LEU*     4.2     7.0    -      -       +      -
    162C  LEU*     2.9    37.1    +      -       +      +
    163C  ALA*     3.7     5.6    -      -       -      +
    165C  ALA*     1.3    77.8    -      -       +      +
    167C  GLN*     1.3    62.0    +      -       -      +
    169C  ASP*     3.6     6.5    +      -       -      +
    170C  PHE*     3.1    22.0    +      -       -      +
    177C  ARG*     3.7    12.7    -      -       +      +
    178C  LEU*     3.4    40.2    +      -       +      +
    179C  LEU      3.4    20.0    -      -       -      -
    180C  LEU*     4.0    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 167 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163C  ALA      3.0    14.2    +      -       -      +
    164C  GLU*     3.5     9.6    -      -       -      +
    166C  PHE*     1.3    76.8    -      -       -      +
    168C  LYS*     1.3    64.3    +      -       -      +
    170C  PHE*     3.0    25.4    +      -       -      +
    171C  THR*     3.2    38.3    +      -       +      +
    177C  ARG*     3.6    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 168 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164C  GLU      2.8    16.9    +      -       -      +
    165C  ALA*     3.3     8.0    +      -       -      +
    167C  GLN*     1.3    78.4    -      -       -      +
    169C  ASP*     1.3    62.2    +      -       -      +
    171C  THR*     3.0    24.4    +      -       -      +
    172C  LYS*     3.2    43.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 169 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129C  ILE*     3.6    33.9    -      -       +      +
    133C  ARG*     2.7    35.7    +      -       -      +
    165C  ALA      2.8    21.9    +      -       -      +
    166C  PHE*     3.8     6.3    -      -       -      +
    168C  LYS*     1.3    73.2    -      -       -      +
    170C  PHE*     1.3    63.9    +      -       -      +
    172C  LYS*     3.2     7.9    +      -       -      +
    173C  SER*     3.0    29.7    +      -       -      -
    178C  LEU*     4.3     5.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  ARG*     5.2     0.4    -      -       -      +
    166C  PHE      3.1    14.2    +      -       -      +
    167C  GLN*     3.0    29.5    +      -       -      +
    169C  ASP*     1.3    81.7    +      -       -      +
    171C  THR*     1.3    61.8    +      -       +      +
    173C  SER*     3.0    31.0    +      -       -      +
    174C  THR      5.9     0.4    -      -       -      -
    175C  LYS      3.3    26.2    -      -       -      -
    176C  GLU*     4.3     6.7    -      -       -      -
    177C  ARG*     3.3    35.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  GLN*     3.4    35.4    -      -       +      +
    168C  LYS*     3.0    17.4    +      -       -      +
    170C  PHE*     1.3    81.5    -      -       +      +
    172C  LYS*     1.3    66.3    +      -       -      +
    173C  SER      3.2     5.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168C  LYS*     3.2    44.3    +      -       +      +
    169C  ASP*     3.2     6.8    +      -       -      +
    170C  PHE      3.1     1.0    -      -       -      -
    171C  THR*     1.3    84.5    +      -       -      +
    173C  SER*     1.3    58.9    +      -       -      +
----------------------------------------------------------
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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