Contacts of the helix formed by residues 114 - 136 (chain H) in PDB entry 2W8B


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 THR 114 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292A  GLU*     2.7    27.1    +      -       -      -
    335A  GLN*     2.9    23.9    +      -       +      +
    336A  ASP*     3.6    26.9    -      -       +      +
    349A  VAL*     3.9    20.2    -      -       +      -
    378A  GLU*     4.1     7.4    -      -       +      -
    113H  GLY*     1.3    80.0    -      -       -      +
    115H  PRO*     1.3    77.2    -      -       -      +
    117H  TYR*     3.6     1.4    -      -       -      +
    118H  ASN*     2.9    24.7    +      -       -      +
    150H  LYS*     4.2     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with PRO 115 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  MET*     3.8     5.0    -      -       +      +
    292A  GLU*     5.1     0.2    -      -       -      +
    378A  GLU*     3.2    28.7    -      -       -      +
    379A  THR*     3.7    16.8    -      -       +      -
    423A  PHE*     3.5    31.9    -      -       +      -
    114H  THR*     1.3    89.6    -      -       -      +
    116H  GLU*     1.3    63.5    +      -       +      +
    118H  ASN*     3.4     1.9    +      -       -      +
    119H  ILE*     3.4    22.0    +      -       -      +
    149H  GLY*     4.9     1.2    -      -       -      -
    150H  LYS*     4.1    13.7    -      -       +      +
    151H  GLU*     3.1    24.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 116 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  MET*     3.8    11.9    -      -       +      +
    204A  SER*     2.8    32.3    +      -       -      +
    217A  VAL*     4.0     4.0    -      -       -      +
    245A  HIS*     2.7    31.6    +      -       -      -
    247A  GLY*     3.8     3.6    -      -       -      -
    248A  ALA*     2.8    36.5    +      -       +      +
    268A  LEU*     3.9     9.7    -      -       -      +
    291A  THR*     4.0    10.0    +      -       -      +
    292A  GLU*     3.5    24.2    +      -       +      +
    114H  THR      3.4     0.4    -      -       -      -
    115H  PRO*     1.3    77.0    -      -       +      +
    117H  TYR*     1.3    66.4    +      -       -      +
    119H  ILE*     3.3    19.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 117 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  LEU*     4.6     0.2    -      -       -      +
    289A  ASN*     4.1     8.7    -      -       +      -
    291A  THR*     3.9    14.4    -      -       +      -
    292A  GLU*     3.2    14.2    +      -       -      +
    305A  THR*     4.1    13.9    -      -       +      -
    307A  ASP*     2.5    46.9    +      -       +      +
    312A  PRO*     3.8    27.6    -      -       +      +
    333A  GLN*     5.8     0.2    -      -       -      -
    335A  GLN*     3.8     9.9    -      -       -      +
    114H  THR*     3.4    18.1    +      -       -      +
    115H  PRO      3.3     0.2    -      -       -      -
    116H  GLU*     1.3    79.3    -      -       -      +
    118H  ASN*     1.3    70.0    +      -       -      +
    120H  SER*     2.9    50.7    +      -       -      -
    121H  LEU*     4.4    17.1    -      -       +      +
    124H  ARG*     3.1    11.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 118 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109H  ALA*     3.7     9.9    -      -       +      +
    110H  ASP      3.1    17.0    -      -       -      +
    112H  ARG      2.8    23.7    +      -       -      +
    113H  GLY*     3.5     7.3    -      -       -      -
    114H  THR      2.9    35.7    +      -       -      +
    115H  PRO      4.1     2.9    -      -       -      +
    116H  GLU      3.3     0.2    -      -       -      -
    117H  TYR*     1.3    88.6    -      -       -      +
    119H  ILE*     1.3    64.3    +      -       -      +
    120H  SER      3.1     0.4    -      -       -      -
    121H  LEU*     3.1    29.1    +      -       -      +
    122H  GLY      3.4     7.8    +      -       -      -
    149H  GLY*     3.4     8.8    -      -       -      -
    150H  LYS*     3.9    15.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 119 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203A  MET*     4.3    13.0    -      -       +      -
    219A  PHE*     4.5     0.9    -      -       +      -
    245A  HIS*     3.5    56.1    -      -       +      +
    268A  LEU*     4.4     7.0    -      -       +      -
    115H  PRO      3.4    10.1    +      -       -      +
    116H  GLU*     3.3    20.0    -      -       -      +
    117H  TYR      2.9     0.2    +      -       -      -
    118H  ASN*     1.3    78.0    -      -       -      +
    120H  SER*     1.3    56.6    +      -       -      +
    121H  LEU      3.2     0.3    +      -       -      -
    122H  GLY      3.3     0.3    +      -       -      -
    123H  GLU*     2.9    25.6    +      -       +      +
    147H  SER*     2.7    47.4    +      -       -      +
    148H  TYR*     3.9     4.5    -      -       -      +
    149H  GLY*     3.7    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 120 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268A  LEU*     3.9     9.3    -      -       -      +
    289A  ASN*     3.4    36.3    -      -       -      -
    117H  TYR*     2.9    31.5    +      -       -      -
    119H  ILE*     1.3    80.5    -      -       -      +
    121H  LEU*     1.3    55.6    +      -       -      +
    123H  GLU*     3.7     8.9    -      -       -      +
    124H  ARG*     2.9    50.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 121 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76H  ASP*     4.4     9.6    -      -       -      +
     78H  TYR*     3.3    27.1    -      -       +      +
    109H  ALA*     3.8     9.0    -      -       +      -
    112H  ARG      5.0     0.7    -      -       -      +
    117H  TYR*     4.4    10.5    -      -       +      +
    118H  ASN*     3.1    35.3    +      -       -      +
    120H  SER*     1.3    76.1    -      -       -      +
    122H  GLY*     1.3    66.6    +      -       -      +
    124H  ARG*     3.2    30.1    +      -       -      +
    125H  ARG*     3.2    38.4    +      -       -      +
   1175H  ACT      3.7    29.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 122 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    107H  GLY*     3.5    10.6    -      -       -      -
    108H  HIS      3.6    31.2    +      -       -      -
    118H  ASN      3.4     5.2    +      -       -      -
    119H  ILE      3.3     2.2    +      -       -      -
    121H  LEU*     1.3    79.8    -      -       -      +
    123H  GLU*     1.3    55.4    +      -       -      -
    125H  ARG*     3.3     3.2    +      -       -      +
    126H  ALA*     3.0    23.9    +      -       -      +
    147H  SER*     3.4    18.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 123 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244A  ARG*     3.5    21.7    +      -       -      +
    245A  HIS*     3.6    10.0    +      -       -      +
    263A  SER*     2.4    41.8    +      -       -      +
    266A  GLY      4.7     3.5    -      -       -      +
    267A  SER*     4.6     9.0    -      -       -      -
    268A  LEU*     4.7     3.2    -      -       -      +
    289A  ASN*     4.9     0.9    -      -       -      +
    119H  ILE*     2.9    25.9    +      -       +      +
    120H  SER*     3.7     8.2    -      -       -      +
    121H  LEU      3.3     0.2    -      -       -      -
    122H  GLY*     1.3    70.0    -      -       -      +
    124H  ARG*     1.3    61.5    +      -       +      +
    126H  ALA*     4.0     0.5    -      -       -      +
    127H  ASN*     2.8    33.6    +      -       -      +
    145H  ILE*     4.2    16.8    -      -       +      +
    147H  SER*     3.3    22.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 124 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289A  ASN*     3.9    13.3    -      -       -      +
    307A  ASP*     3.7    11.3    +      -       -      -
     78H  TYR*     3.6    52.6    +      -       +      +
    117H  TYR*     3.1    17.4    +      -       -      -
    120H  SER*     2.9    42.8    +      -       -      +
    121H  LEU*     3.2    19.1    -      -       -      +
    122H  GLY      3.4     0.4    -      -       -      -
    123H  GLU*     1.3    74.8    -      -       +      +
    125H  ARG*     1.3    58.1    +      -       -      +
    127H  ASN*     3.8     5.8    -      -       -      +
    128H  ALA*     3.0    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 125 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73H  PHE*     3.4    52.4    -      -       +      +
     74H  ASP      3.3    13.7    +      -       -      -
     76H  ASP*     3.7     5.5    -      -       -      +
     77H  LYS      3.0    25.5    +      -       -      +
     78H  TYR*     4.1    11.0    -      -       +      -
    108H  HIS      2.9    27.7    +      -       -      -
    109H  ALA*     3.4     5.1    -      -       -      +
    121H  LEU*     3.2    14.9    +      -       -      +
    122H  GLY*     3.6     7.0    -      -       -      +
    124H  ARG*     1.3    73.5    -      -       -      +
    126H  ALA*     1.3    66.8    +      -       -      +
    128H  ALA*     3.1     4.9    +      -       -      +
    129H  VAL*     3.1    24.4    +      -       -      +
    167H  ARG*     3.7    10.7    -      -       -      +
    168H  ARG      4.4     5.2    -      -       -      +
    169H  ALA*     4.4     6.3    -      -       +      -
   1175H  ACT      2.7    44.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 126 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105H  VAL*     3.4    42.3    -      -       +      +
    107H  GLY      4.1     8.3    -      -       -      +
    122H  GLY      3.0    16.5    +      -       -      +
    123H  GLU      4.0     2.5    -      -       -      +
    125H  ARG*     1.3    74.9    -      -       -      +
    127H  ASN*     1.3    64.7    +      -       -      +
    129H  VAL*     3.0     7.3    +      -       -      +
    130H  LYS*     3.0    19.8    +      -       -      +
    145H  ILE*     3.9    21.1    -      -       +      +
    146H  VAL      5.0     0.9    -      -       -      +
    169H  ALA*     4.4     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 127 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244A  ARG*     2.8    39.7    -      -       -      +
    266A  GLY      6.1     0.2    -      -       -      -
    123H  GLU      2.8    23.4    +      -       -      +
    124H  ARG*     3.8     6.7    -      -       -      +
    126H  ALA*     1.3    71.3    -      -       -      +
    128H  ALA*     1.3    52.7    +      -       -      +
    130H  LYS*     2.8    16.2    +      -       -      +
    131H  MET*     2.7    53.3    +      -       -      +
    145H  ILE*     4.5     4.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 128 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78H  TYR*     3.1    28.5    -      -       +      +
     79H  ASP*     4.7     1.6    -      -       -      -
     80H  ILE*     3.7    17.0    -      -       +      +
    124H  ARG      3.0    13.5    +      -       -      +
    125H  ARG      3.1     4.5    +      -       -      +
    127H  ASN*     1.3    77.1    -      -       -      +
    129H  VAL*     1.3    62.9    +      -       -      +
    131H  MET*     3.9     7.1    -      -       -      +
    132H  TYR*     3.0    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 129 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71H  VAL*     4.1    15.7    -      -       +      -
     73H  PHE*     4.8     0.4    -      -       +      -
     80H  ILE*     3.7    20.4    -      -       +      -
     88H  LEU*     4.1    20.6    -      -       +      +
    105H  VAL*     3.8    25.1    -      -       +      -
    125H  ARG      3.1    12.3    +      -       -      +
    126H  ALA      3.0     8.8    +      -       -      +
    128H  ALA*     1.3    77.7    -      -       -      +
    130H  LYS*     1.3    62.7    +      -       -      +
    132H  TYR*     3.3     3.2    +      -       -      +
    133H  LEU*     3.0    33.2    +      -       +      +
    169H  ALA*     4.0    20.4    -      -       +      -
    171H  LEU*     4.1     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 130 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244A  ARG*     4.3     7.2    -      -       -      +
   1432A  SO4      3.1    30.2    +      -       -      +
    105H  VAL*     5.6     0.2    -      -       +      -
    126H  ALA      3.0    10.7    +      -       -      +
    127H  ASN*     2.8    14.0    +      -       -      +
    129H  VAL*     1.3    79.8    -      -       -      +
    131H  MET*     1.3    66.6    +      -       -      +
    133H  LEU*     3.4     2.3    +      -       -      +
    134H  GLN*     2.9    45.2    +      -       -      +
    140H  ALA*     3.2    21.2    +      -       -      +
    143H  ILE*     2.8    56.3    +      -       +      +
    145H  ILE*     4.0    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 131 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127H  ASN*     2.7    44.2    +      -       -      +
    128H  ALA*     4.0     7.0    -      -       -      +
    130H  LYS*     1.3    75.2    -      -       -      +
    132H  TYR*     1.3    56.7    +      -       -      +
    134H  GLN*     3.0    32.0    +      -       +      +
    135H  GLY*     2.8    26.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 132 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80H  ILE*     4.2    26.9    -      -       +      -
     85H  ALA*     3.3    34.2    +      -       +      +
     88H  LEU*     3.6    28.5    -      -       +      -
     89H  ASP*     2.9    31.3    +      -       -      -
    128H  ALA      3.0    17.5    +      -       -      +
    129H  VAL*     3.6     4.3    -      -       -      +
    130H  LYS      3.3     0.2    -      -       -      -
    131H  MET*     1.3    74.6    -      -       -      +
    133H  LEU*     1.3    70.0    +      -       +      +
    135H  GLY*     3.0     6.3    +      -       -      +
    136H  LYS*     3.0    40.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 133 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88H  LEU*     3.6    37.2    -      -       +      +
     91H  HIS*     4.2     4.9    -      -       +      -
     92H  ALA*     3.8    19.3    -      -       +      +
     95H  LEU*     4.2    16.4    -      -       +      -
    103H  VAL*     4.3     9.6    -      -       +      -
    105H  VAL*     5.1     1.1    -      -       +      -
    129H  VAL*     3.0    34.4    +      -       +      +
    130H  LYS*     5.0     0.4    -      -       -      -
    132H  TYR*     1.3    78.3    -      -       +      +
    134H  GLN*     1.3    58.3    +      -       -      +
    136H  LYS*     2.8    18.0    +      -       -      +
    138H  VAL*     3.0    26.6    +      -       +      +
    143H  ILE*     3.8    26.5    -      -       +      -
    171H  LEU*     4.4     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 134 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130H  LYS*     2.9    36.2    +      -       -      +
    131H  MET*     3.0    38.4    +      -       +      +
    133H  LEU*     1.3    76.1    -      -       -      +
    135H  GLY*     1.3    61.2    +      -       -      +
    137H  GLY*     3.1    14.6    +      -       -      -
    138H  VAL      3.8    19.6    +      -       -      +
    140H  ALA*     3.3    30.4    +      -       -      +
    143H  ILE*     4.4    10.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 135 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131H  MET      2.8    13.0    +      -       -      -
    132H  TYR*     3.0     8.3    +      -       -      -
    134H  GLN*     1.3    77.2    -      -       -      +
    136H  LYS*     1.3    68.3    +      -       -      +
    137H  GLY      3.2     1.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 136 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89H  ASP*     3.6    27.7    +      -       -      +
     92H  ALA*     3.3    28.3    -      -       +      -
     96H  ARG*     2.7    35.3    +      -       -      +
    132H  TYR*     3.0    37.3    +      -       +      +
    133H  LEU      2.8     8.7    +      -       -      +
    135H  GLY*     1.3    87.0    -      -       -      +
    137H  GLY*     1.3    57.4    +      -       -      +
    138H  VAL      3.5     0.4    +      -       -      -
----------------------------------------------------------
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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