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


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 C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10C  LEU*     4.3    14.6    -      -       +      -
     57C  LEU*     4.3     2.2    -      -       +      -
    101C  ILE*     5.3     1.8    -      -       +      +
    104C  ILE*     3.7    32.1    -      -       +      +
    105C  VAL*     3.8    30.5    -      -       +      +
    108C  ALA*     5.3     0.2    -      -       +      -
    116C  THR*     3.0    32.5    +      -       +      +
    117C  PHE*     3.3     6.2    +      -       -      +
    118C  ASN      3.3     0.6    -      -       -      -
    119C  PHE*     1.3    93.1    -      -       +      +
    121C  GLN*     1.3    60.5    +      -       -      +
    122C  TRP      3.4     0.9    -      -       -      -
    123C  TYR*     3.0    32.7    +      -       +      +
    124C  VAL*     2.9    27.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 121 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  GLN*     5.9     0.4    -      -       -      +
    105C  VAL*     4.3     9.7    -      -       -      +
    117C  PHE*     2.9    59.8    +      -       +      +
    118C  ASN*     3.6    14.1    -      -       -      +
    119C  PHE      3.2     2.2    -      -       -      -
    120C  LEU*     1.3    76.6    -      -       -      +
    122C  TRP*     1.3    65.7    +      -       -      +
    124C  VAL*     3.4    18.2    +      -       -      +
    125C  ALA*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 122 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     53C  HIS*     3.8    25.4    -      +       -      -
     56C  LYS*     3.6    48.5    -      -       +      +
     57C  LEU*     4.9     3.4    -      -       +      -
    118C  ASN      5.0     0.2    +      -       -      -
    119C  PHE*     2.7    59.9    +      +       -      -
    121C  GLN*     1.3    76.8    -      -       -      +
    123C  TYR*     1.3    89.2    +      +       +      +
    125C  ALA*     3.5     5.0    +      -       -      +
    126C  GLU*     2.9    67.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 123 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13C  GLN*     3.0    30.3    +      -       +      +
     17C  GLU*     2.3    38.5    +      -       -      +
     53C  HIS*     3.9    23.1    -      +       +      -
     57C  LEU*     4.1    16.8    -      -       +      -
    101C  ILE*     3.4    34.7    -      -       +      +
    104C  ILE*     5.3     1.3    -      -       +      -
    120C  LEU*     3.0    30.4    +      -       +      +
    122C  TRP*     1.3   114.4    -      +       +      +
    124C  VAL*     1.3    59.2    +      -       -      +
    126C  GLU*     4.8     0.9    -      -       +      -
    127C  GLN*     2.9    36.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 124 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101C  ILE*     3.8    23.8    -      -       +      -
    102C  ASN*     5.4     9.2    -      -       -      +
    105C  VAL*     3.9    19.1    -      -       +      -
    120C  LEU      2.9    17.4    +      -       -      +
    121C  GLN*     3.8    22.2    -      -       -      +
    123C  TYR*     1.3    75.6    -      -       -      +
    125C  ALA*     1.3    64.0    +      -       -      +
    127C  GLN*     4.0     3.4    -      -       -      +
    128C  HIS*     3.1    25.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 125 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  GLN      3.0    18.2    +      -       -      +
    122C  TRP*     3.8     5.4    -      -       -      +
    124C  VAL*     1.3    82.3    -      -       +      +
    126C  GLU*     1.3    63.6    +      -       +      +
    128C  HIS*     3.4     7.0    +      -       -      +
    129C  GLU*     3.2    20.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 126 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49C  GLU*     4.3     6.1    -      -       -      +
     53C  HIS*     3.5    21.0    +      -       +      +
     56C  LYS*     4.5    10.8    +      -       -      -
    122C  TRP*     2.9    54.1    +      -       +      +
    123C  TYR*     4.2     2.5    -      -       +      +
    125C  ALA*     1.3    74.1    -      -       +      +
    127C  GLN*     1.3    58.3    -      -       -      +
    129C  GLU*     3.3    14.0    +      -       -      +
    130C  GLU*     3.0    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 127 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17C  GLU*     5.2     1.2    -      -       -      +
     50C  GLU*     4.5     1.7    -      -       -      +
     53C  HIS*     5.1     4.4    +      -       +      -
     94C  GLU*     2.9    54.2    +      -       -      +
     97C  ILE*     3.7    15.1    -      -       -      +
     98C  SER*     3.1    22.5    +      -       -      +
    101C  ILE*     3.6    24.2    -      -       +      +
    123C  TYR*     2.9    22.2    +      -       +      +
    124C  VAL*     4.0     3.6    -      -       -      +
    126C  GLU*     1.3    72.7    -      -       -      +
    128C  HIS*     1.3    61.4    +      -       -      +
    130C  GLU*     3.2    15.9    +      -       -      +
    131C  GLU*     2.8    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 128 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98C  SER*     5.3     0.4    -      -       -      -
    124C  VAL*     3.1    19.9    +      -       +      +
    125C  ALA*     3.7     7.4    -      -       -      +
    127C  GLN*     1.3    75.0    -      -       -      +
    129C  GLU*     1.3    61.3    +      -       +      +
    131C  GLU*     3.4    13.9    +      -       -      +
    132C  VAL*     2.9    53.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 129 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125C  ALA      3.2    10.3    +      -       -      +
    126C  GLU*     3.5    16.0    -      -       -      +
    128C  HIS*     1.3    82.9    -      -       +      +
    130C  GLU*     1.3    57.3    +      -       +      +
    132C  VAL*     3.4     6.2    +      -       +      +
    133C  LEU*     2.9    29.6    +      -       -      +
    165C  ARG*     4.4    25.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 130 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46C  HIS*     3.3    21.0    -      -       +      +
     49C  GLU*     3.9     9.3    -      -       -      +
     50C  GLU*     2.8    30.3    -      -       -      +
     53C  HIS*     2.7    31.3    +      -       -      -
     94C  GLU*     4.1     4.2    -      -       -      +
    126C  GLU*     3.0    20.8    +      -       -      +
    127C  GLN*     3.2    20.5    +      -       -      +
    129C  GLU*     1.3    73.9    -      -       +      +
    131C  GLU*     1.3    58.8    +      -       -      +
    133C  LEU*     3.2     9.2    +      -       +      +
    134C  PHE*     3.0    36.7    +      -       +      -
    165C  ARG*     4.8    13.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 131 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91C  TYR*     3.7    19.8    +      -       +      -
     94C  GLU*     4.3    17.9    -      -       +      -
     95C  GLN*     3.6    23.1    -      -       -      +
     98C  SER*     2.6    35.4    +      -       -      +
    127C  GLN*     2.8    22.8    +      -       -      +
    128C  HIS*     3.7    13.0    +      -       -      +
    130C  GLU*     1.3    72.8    -      -       -      +
    132C  VAL*     1.3    57.5    +      -       +      +
    134C  PHE*     3.3     2.5    +      -       -      +
    135C  LYS*     3.0    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 132 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128C  HIS*     2.9    51.0    +      -       +      +
    129C  GLU*     3.7     6.7    -      -       +      +
    131C  GLU*     1.3    72.4    -      -       +      +
    133C  LEU*     1.3    61.8    +      -       -      +
    135C  LYS*     3.3    23.0    +      -       -      +
    136C  ASP*     2.9    41.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 133 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42C  PHE*     3.6    28.7    -      -       +      -
     46C  HIS*     5.5     2.7    -      -       -      +
    129C  GLU      2.9    14.7    +      -       -      +
    130C  GLU*     3.3    13.7    -      -       +      +
    132C  VAL*     1.3    78.0    -      -       -      +
    134C  PHE*     1.3    62.7    +      -       +      +
    136C  ASP*     3.3     9.1    +      -       +      +
    137C  ILE*     3.0    38.5    +      -       +      +
    161C  ILE*     3.9    28.3    -      -       +      -
    165C  ARG*     3.5    39.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 134 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24C  TYR*     3.9     7.6    -      +       -      -
     42C  PHE*     3.6    23.6    -      +       -      -
     43C  LEU*     4.1     2.5    -      -       +      -
     46C  HIS*     3.3    49.1    -      +       -      -
     87C  PHE*     3.9    29.0    -      +       -      +
     90C  ALA*     3.6    34.5    -      -       +      -
     91C  TYR*     4.1    20.7    -      -       +      +
     94C  GLU*     3.9    12.6    -      -       +      -
    130C  GLU      3.0    27.7    +      -       -      +
    131C  GLU      3.3     3.3    +      -       -      +
    133C  LEU*     1.3    77.8    -      -       +      +
    135C  LYS*     1.3    60.2    +      -       -      +
    137C  ILE*     3.4     4.2    +      -       -      +
    138C  LEU*     3.0    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 135 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91C  TYR*     3.6    40.2    -      -       +      +
    131C  GLU      3.0     8.7    +      -       -      +
    132C  VAL*     3.4    24.7    -      -       -      +
    134C  PHE*     1.3    77.0    -      -       -      +
    136C  ASP*     1.3    78.9    +      -       -      +
    138C  LEU*     3.4     3.4    +      -       -      +
    139C  ASP*     2.9    47.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 136 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132C  VAL*     2.9    31.4    +      -       -      +
    133C  LEU*     3.3     8.5    +      -       +      +
    135C  LYS*     1.3   102.8    +      -       -      +
    137C  ILE*     1.3    63.4    +      -       +      +
    139C  ASP*     3.3     7.0    +      -       -      +
    140C  LYS*     2.9    32.8    +      -       -      +
    157C  TYR*     5.3     4.4    -      -       +      +
    161C  ILE*     6.3     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 137 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42C  PHE*     3.2    45.1    -      -       +      -
     87C  PHE*     3.6    28.3    -      -       +      -
    133C  LEU*     3.0    30.3    +      -       +      +
    134C  PHE*     4.0     4.7    -      -       -      +
    136C  ASP*     1.3    75.5    -      -       +      +
    138C  LEU*     1.3    57.6    +      -       -      +
    140C  LYS*     3.2     7.2    +      -       +      +
    141C  ILE*     2.8    34.1    +      -       +      +
    157C  TYR*     5.2     1.8    -      -       +      -
    158C  VAL*     3.8    23.6    -      -       +      -
    161C  ILE*     3.8    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 138 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84C  THR*     4.1     9.2    -      -       +      +
     87C  PHE*     4.0    10.5    -      -       +      +
     88C  GLN*     3.8    52.0    -      -       +      +
     91C  TYR*     3.8    35.0    -      -       +      -
    134C  PHE      3.0    18.8    +      -       -      +
    135C  LYS*     3.7     4.7    -      -       -      +
    137C  ILE*     1.3    76.5    -      -       -      +
    139C  ASP*     1.3    58.0    +      -       -      +
    141C  ILE*     3.3     8.6    +      -       +      +
    142C  GLU*     2.9    50.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 139 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135C  LYS*     2.9    39.5    +      -       -      +
    136C  ASP*     3.5     9.1    -      -       -      +
    138C  LEU*     1.3    76.2    -      -       -      +
    140C  LYS*     1.3    60.7    +      -       -      +
    142C  GLU*     3.7     5.6    -      -       -      +
    143C  LEU*     2.9    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 140 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136C  ASP*     2.9    18.5    +      -       -      +
    137C  ILE      3.6     4.3    -      -       -      +
    139C  ASP*     1.3    76.0    -      -       -      +
    141C  ILE*     1.3    60.3    +      -       +      +
    143C  LEU*     3.3    25.4    +      -       +      +
    144C  ILE*     2.9    48.8    +      -       +      +
    157C  TYR*     3.4    62.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 141 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83C  LEU*     3.9    26.9    -      -       +      +
     84C  THR*     3.3    37.7    +      -       +      +
     87C  PHE*     3.6    42.2    -      -       +      -
    137C  ILE*     2.8    32.9    +      -       +      +
    138C  LEU*     3.7     6.5    -      -       +      +
    140C  LYS*     1.3    72.0    -      -       +      +
    142C  GLU*     1.3    59.2    +      -       -      +
    144C  ILE*     4.0     0.9    -      -       -      +
    145C  GLY*     3.1    27.9    +      -       -      +
    146C  ASN*     5.8     0.9    -      -       -      +
    154C  ALA*     4.3    15.7    -      -       +      +
    158C  VAL*     4.8     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 142 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84C  THR*     3.3    26.7    -      -       +      +
     88C  GLN*     5.0     7.6    +      -       -      +
    138C  LEU*     2.9    34.8    +      -       +      +
    139C  ASP*     3.7     7.4    -      -       -      +
    141C  ILE*     1.3    76.3    -      -       -      +
    143C  LEU*     1.3    62.2    +      -       -      +
    145C  GLY*     3.8     8.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 143 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139C  ASP      2.9    18.7    +      -       -      +
    140C  LYS*     3.3    31.6    +      -       +      +
    142C  GLU*     1.3    75.4    -      -       -      +
    144C  ILE*     1.3    66.7    +      -       +      +
    145C  GLY*     4.7     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 144 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140C  LYS*     2.9    40.7    +      -       +      +
    141C  ILE      4.1     2.5    -      -       -      +
    143C  LEU*     1.3    83.1    -      -       +      +
    145C  GLY*     1.3    61.1    +      -       -      +
    147C  GLU*     5.3     1.9    +      -       -      +
    150C  GLY*     3.4    35.4    -      -       -      +
    153C  LEU*     4.0    22.7    -      -       +      +
    154C  ALA*     3.6    29.4    -      -       +      +
    157C  TYR*     4.7     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 145 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141C  ILE      3.1    16.1    +      -       -      +
    142C  GLU*     3.8     7.1    +      -       -      -
    143C  LEU      3.5     1.2    -      -       -      -
    144C  ILE*     1.3    82.3    -      -       -      +
    146C  ASN*     1.3    69.2    +      -       -      +
    147C  GLU*     3.7     1.3    -      -       -      -
    150C  GLY*     3.3    22.1    -      -       -      +
    154C  ALA*     5.5     1.4    -      -       -      +
----------------------------------------------------------
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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