Contacts of the helix formed by residues 119 - 142 (chain D) in PDB entry 4GCK


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 ASP 119 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26C  SER      4.9     2.4    -      -       -      +
     29C  SER*     3.2    36.2    +      -       -      +
     30C  GLN*     4.9    11.7    +      -       -      +
    114D  LEU      5.5     1.7    -      -       -      +
    117D  GLU      3.5     6.0    +      -       -      +
    118D  GLN*     1.3    85.0    +      -       -      +
    120D  ARG*     1.3    63.5    +      -       -      +
    121D  LEU      3.1     0.2    -      -       -      -
    122D  GLN*     3.1    20.3    +      -       +      +
    123D  GLY*     3.5     6.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 120 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56D  THR*     2.9    35.2    -      -       -      +
     57D  ARG*     2.7    21.6    -      -       -      +
     60D  ASP*     2.5    29.2    +      -       -      -
    118D  GLN*     2.4    46.2    +      -       +      +
    119D  ASP*     1.3    67.9    -      -       -      +
    121D  LEU*     1.3    70.0    +      -       -      +
    123D  GLY*     3.1     5.3    +      -       -      +
    124D  ARG*     3.0    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 121 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56D  THR*     3.7    26.7    -      -       +      +
     59D  PHE*     3.8    12.6    -      -       +      -
     60D  ASP*     3.6    35.2    -      -       -      +
     63D  ILE*     3.7    13.1    -      -       +      +
    114D  LEU*     3.9    17.3    -      -       +      -
    117D  GLU*     3.5    37.5    -      -       +      -
    118D  GLN      3.6     9.2    -      -       -      +
    119D  ASP      3.1     0.8    -      -       -      -
    120D  ARG*     1.3    90.1    -      -       -      +
    122D  GLN*     1.3    61.6    +      -       -      +
    124D  ARG*     3.0    16.4    +      -       -      +
    125D  ILE*     3.1    15.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 122 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112C  HIS*     5.6     1.4    -      -       -      -
    175C  ARG*     4.0    24.6    -      -       -      +
    109D  LEU      5.3     0.3    -      -       -      +
    110D  THR      5.5     0.5    -      -       -      -
    111D  GLY*     3.2    35.9    +      -       -      -
    114D  LEU*     3.7    20.8    -      -       +      +
    115D  MET*     6.2     0.4    -      -       -      -
    118D  GLN      4.4     0.6    +      -       -      -
    119D  ASP*     3.1    13.7    +      -       +      +
    121D  LEU*     1.3    76.3    -      -       -      +
    123D  GLY*     1.3    58.4    +      -       -      +
    125D  ILE*     2.9    16.1    +      -       -      +
    126D  ASN*     2.8    53.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 123 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119D  ASP      3.5     5.2    +      -       -      -
    120D  ARG*     3.1     9.6    +      -       -      -
    122D  GLN*     1.3    80.0    -      -       -      +
    124D  ARG*     1.3    55.4    +      -       -      +
    126D  ASN*     3.1    14.9    +      -       -      +
    127D  GLN*     2.9    33.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 124 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60D  ASP*     2.8    58.6    +      -       -      +
     63D  ILE*     3.9    21.9    -      -       +      +
     64D  GLU*     2.9    38.3    +      -       -      +
     67D  GLU*     3.9    19.7    +      -       -      +
    120D  ARG*     3.0    18.6    +      -       -      +
    121D  LEU*     3.0    13.9    +      -       -      +
    123D  GLY*     1.3    75.7    -      -       -      +
    125D  ILE*     1.3    63.2    +      -       -      +
    127D  GLN*     3.1    27.9    +      -       -      +
    128D  LEU*     3.2    12.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 125 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63D  ILE*     3.9    30.3    -      -       +      -
     66D  ILE*     5.0     4.3    -      -       +      -
    108D  ILE*     4.1    13.2    -      -       +      +
    109D  LEU*     3.6    28.5    -      -       +      +
    114D  LEU*     3.7    18.8    -      -       +      -
    121D  LEU      3.1    11.6    +      -       -      +
    122D  GLN*     2.9    21.6    +      -       -      +
    124D  ARG*     1.3    75.6    -      -       -      +
    126D  ASN*     1.3    66.7    +      -       -      +
    128D  LEU*     3.0    13.0    +      -       +      +
    129D  PHE*     3.0    46.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 126 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175C  ARG*     2.8    66.8    +      -       -      +
    176C  SER*     4.4     4.7    -      -       -      +
    122D  GLN*     2.8    26.4    +      -       -      +
    123D  GLY*     3.1    15.1    +      -       -      +
    125D  ILE*     1.3    77.3    -      -       -      +
    127D  GLN*     1.3    61.4    +      -       +      +
    129D  PHE*     3.5     1.6    +      -       -      +
    130D  GLU*     3.0    32.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 127 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67D  GLU*     6.6     0.2    -      -       -      -
    123D  GLY      2.9    15.7    +      -       -      +
    124D  ARG*     3.4    30.9    +      -       +      +
    125D  ILE      3.1     0.6    -      -       -      -
    126D  ASN*     1.3    75.2    -      -       +      +
    128D  LEU*     1.3    59.8    +      -       -      +
    130D  GLU*     3.2     7.5    +      -       -      +
    131D  ARG*     2.8    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 128 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63D  ILE*     5.5     2.7    -      -       +      +
     66D  ILE*     3.9    28.7    -      -       +      -
     67D  GLU*     3.7    43.0    -      -       +      +
     70D  LEU*     4.2     9.6    -      -       +      -
     71D  ILE*     4.3    13.5    -      -       +      -
    109D  LEU*     4.2    16.2    -      -       +      -
    124D  ARG      3.2    10.7    +      -       -      +
    125D  ILE*     3.0    17.4    +      -       +      +
    127D  GLN*     1.3    74.5    -      -       -      +
    129D  PHE*     1.3    58.8    +      -       +      +
    131D  ARG*     3.0     9.8    +      -       +      +
    132D  ILE*     2.8    47.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 129 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175C  ARG*     3.6    43.5    -      -       -      +
     95D  ILE*     6.0     4.7    -      -       +      -
    109D  LEU*     3.5    46.4    -      -       +      -
    125D  ILE*     3.0    30.0    +      -       +      -
    126D  ASN      3.7     6.7    -      -       -      +
    128D  LEU*     1.3    80.7    -      -       +      +
    130D  GLU*     1.3    52.3    +      -       -      +
    132D  ILE*     3.3    13.1    +      -       +      +
    133D  GLU*     2.7    36.3    +      -       -      +
    163D  LEU*     3.7    29.1    -      -       +      +
    166D  CYS*     6.1     0.7    -      -       +      -
    167D  GLU*     4.0    24.0    -      -       +      -
    170D  LEU*     5.3     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 130 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  ARG*     5.0     0.2    +      -       -      -
    175C  ARG*     4.7     7.8    +      -       -      -
    180C  TYR*     2.4    37.2    +      -       -      -
    126D  ASN*     3.0    25.5    +      -       +      +
    127D  GLN*     3.6     7.4    -      -       -      +
    129D  PHE*     1.3    75.5    -      -       -      +
    131D  ARG*     1.3    59.0    +      -       -      +
    133D  GLU*     3.2    14.7    +      -       -      +
    134D  VAL*     2.8    40.2    +      -       +      +
    137D  ARG*     5.0    11.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 131 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67D  GLU*     4.1    20.4    +      -       -      +
     71D  ILE*     3.7    50.0    -      -       +      +
    127D  GLN      2.8    14.1    +      -       -      +
    128D  LEU*     3.0    13.9    +      -       +      +
    130D  GLU*     1.3    78.3    -      -       -      +
    132D  ILE*     1.3    62.1    +      -       -      +
    134D  VAL*     3.3     7.4    +      -       -      +
    135D  GLN*     3.1    27.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 132 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  LEU*     4.1    23.8    -      -       +      -
     71D  ILE*     4.4    11.7    -      -       +      -
     74D  ILE*     5.5     7.9    -      -       +      -
     91D  ILE*     4.9     4.7    -      -       +      -
     95D  ILE*     3.9    30.3    -      -       +      -
    109D  LEU*     6.2     0.2    -      -       +      -
    128D  LEU*     2.8    45.6    +      -       +      +
    129D  PHE*     3.7    16.4    -      -       +      +
    131D  ARG*     1.3    73.4    -      -       -      +
    133D  GLU*     1.3    64.4    +      -       -      +
    135D  GLN*     3.2     9.2    +      -       +      +
    136D  LEU*     3.0    32.8    +      -       +      +
    163D  LEU*     4.4    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 133 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172C  ARG*     3.2    29.6    +      -       -      -
    175C  ARG*     4.9     0.5    +      -       -      -
    129D  PHE      2.7    19.0    +      -       -      +
    130D  GLU*     3.2    17.0    +      -       -      +
    132D  ILE*     1.3    74.7    -      -       -      +
    134D  VAL*     1.3    56.6    +      -       -      +
    136D  LEU*     3.3    10.8    +      -       -      +
    137D  ARG*     2.9    48.7    +      -       -      +
    156D  THR*     4.4     4.7    -      -       -      +
    159D  ALA*     3.9    17.9    -      -       +      +
    160D  SER*     3.4    19.6    +      -       -      -
    163D  LEU*     3.1    26.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 134 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130D  GLU*     2.8    35.2    +      -       +      +
    131D  ARG*     3.6     7.9    -      -       -      +
    132D  ILE      3.3     0.2    -      -       -      -
    133D  GLU*     1.3    72.8    -      -       -      +
    135D  GLN*     1.3    57.4    +      -       -      +
    137D  ARG*     2.8    35.8    -      -       +      +
    138D  GLN*     2.9    28.8    +      -       +      +
    141D  ARG*     4.7     3.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 135 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71D  ILE*     5.7     7.0    -      -       +      -
     74D  ILE*     4.2    17.4    -      -       +      +
     75D  ASN*     4.1    11.9    +      -       -      -
     78D  LEU*     3.5    32.2    -      -       -      +
     91D  ILE*     5.5     3.6    -      -       +      -
    131D  ARG*     3.1    17.2    +      -       +      +
    132D  ILE*     3.2    12.3    +      -       +      +
    134D  VAL*     1.3    73.1    -      -       -      +
    136D  LEU*     1.3    68.4    +      -       +      +
    138D  GLN*     3.0    26.1    +      -       -      +
    139D  VAL*     2.8    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 136 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88D  LEU*     3.8    25.7    -      -       +      +
     91D  ILE*     3.7    31.4    -      -       +      -
     92D  VAL*     5.3     5.4    -      -       +      -
     95D  ILE*     5.7     1.3    -      -       +      -
    132D  ILE*     3.0    25.8    +      -       +      +
    133D  GLU*     3.4    13.5    -      -       -      +
    135D  GLN*     1.3    81.1    -      -       -      +
    137D  ARG*     1.3    61.2    +      -       -      +
    139D  VAL*     3.4     4.5    +      -       -      +
    140D  MET*     3.0    31.9    +      -       +      +
    159D  ALA*     3.9    27.1    -      -       +      +
    162D  LEU*     4.1    19.7    -      -       +      -
    163D  LEU*     4.5     9.4    -      -       +      +
    166D  CYS*     6.2     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 137 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130D  GLU*     5.0     6.9    +      -       -      -
    133D  GLU*     2.9    40.2    +      -       -      +
    134D  VAL*     2.8    48.6    -      -       -      +
    136D  LEU*     1.3    73.6    -      -       -      +
    138D  GLN*     1.3    54.8    +      -       -      +
    140D  MET*     3.1     7.8    +      -       -      +
    141D  ARG*     2.8    67.8    +      -       -      +
    155D  GLU*     3.8    22.0    -      -       +      +
    156D  THR*     3.8    34.3    +      -       -      +
    159D  ALA*     4.1     6.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 138 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  LEU*     4.7     6.4    -      -       -      +
     87D  ARG*     4.9     2.8    +      -       -      -
    134D  VAL*     2.9    15.4    +      -       +      +
    135D  GLN*     3.0    33.2    +      -       -      +
    137D  ARG*     1.3    72.5    -      -       -      +
    139D  VAL*     1.3    78.4    +      -       -      +
    141D  ARG*     3.1    23.5    +      -       -      +
    142D  GLU*     3.2    44.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 139 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78D  LEU*     3.5    31.6    -      -       +      -
     84D  THR*     3.8    29.1    +      -       +      +
     87D  ARG*     3.9    24.1    +      -       +      +
     88D  LEU*     3.7    22.2    -      -       +      -
     91D  ILE*     4.4    11.4    -      -       +      -
    135D  GLN*     2.8    24.3    +      -       -      +
    136D  LEU      3.6     7.9    -      -       -      +
    138D  GLN*     1.3    78.8    -      -       -      +
    140D  MET*     1.3    63.5    +      -       -      +
    142D  GLU*     3.3    12.8    +      -       -      +
    143D  LYS      3.7     5.5    +      -       -      -
    146D  ARG*     5.8     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 140 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84D  THR*     4.5     2.0    -      -       -      -
     88D  LEU*     4.0    18.2    -      -       +      -
    136D  LEU*     3.0    17.4    +      -       +      +
    137D  ARG      3.4     6.7    -      -       -      +
    139D  VAL*     1.3    76.4    -      -       -      +
    141D  ARG*     1.3    62.2    +      -       -      +
    143D  LYS*     3.1    21.5    +      -       -      +
    144D  LYS*     4.8     1.6    +      -       -      +
    150D  GLY*     5.5     0.3    -      -       -      -
    151D  TYR*     3.6    26.6    -      -       +      -
    155D  GLU*     3.6    24.9    -      -       +      +
    158D  LEU*     3.6    28.3    -      -       +      -
    159D  ALA*     3.4    36.3    -      -       +      +
    162D  LEU*     3.4    26.5    -      -       +      -
    197D  LEU*     5.0     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 141 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134D  VAL*     4.7     4.8    +      -       -      +
    137D  ARG*     2.8    63.3    +      -       -      +
    138D  GLN*     3.1    13.9    +      -       -      +
    140D  MET*     1.3    72.4    -      -       -      +
    142D  GLU*     1.3    61.1    +      -       +      +
    143D  LYS      3.2     1.4    +      -       -      -
    144D  LYS*     3.8    23.2    -      -       -      +
    145D  MET*     4.6     4.9    -      -       -      +
    155D  GLU*     3.8    27.8    +      -       +      +
    156D  THR*     4.8     5.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 142 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  ARG*     3.9     5.7    +      -       -      -
    138D  GLN*     3.2    41.6    +      -       +      +
    139D  VAL*     3.7     8.7    -      -       -      +
    140D  MET      3.1     1.2    -      -       -      -
    141D  ARG*     1.3    77.7    -      -       +      +
    143D  LYS*     1.3    64.3    +      -       -      +
    144D  LYS      3.3     1.6    -      -       -      -
    145D  MET*     3.6    18.6    +      -       +      +
    146D  ARG*     2.7    70.2    +      -       +      +
----------------------------------------------------------
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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