Contacts of the helix formed by residues 116 - 138 (chain B) in PDB entry 2B05


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 GLN 116 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36B  PRO*     4.7    21.4    -      -       -      +
    111B  ASN      3.7     4.1    +      -       -      +
    112B  CYS*     3.3    10.2    -      -       +      +
    113B  SER*     2.5    53.1    +      -       -      +
    114B  GLU      3.4     0.4    -      -       -      -
    115B  THR*     1.3    77.8    -      -       -      +
    117B  TYR*     1.3    62.9    +      -       -      +
    118B  GLU*     3.3     7.2    -      -       -      -
    119B  SER*     3.3    17.1    +      -       -      +
    120B  LYS*     3.1    22.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  GLU      3.1    23.3    -      -       -      -
    115B  THR*     3.1    29.8    +      -       -      +
    116B  GLN*     1.3    71.7    -      -       -      +
    118B  GLU*     1.3    74.4    +      -       -      +
    120B  LYS*     3.2     7.8    +      -       -      +
    121B  VAL*     2.9    30.1    +      -       +      +
    160B  ILE*     4.3    12.1    -      -       +      -
    164B  HIS*     3.4    68.8    +      +       +      +
    165B  MET*     4.5     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  ARG*     4.6    10.1    -      -       -      +
    115B  THR      4.7     4.2    -      -       -      +
    116B  GLN*     4.4     3.5    -      -       -      -
    117B  TYR*     1.3    91.1    +      -       -      +
    119B  SER*     1.3    57.4    +      -       -      +
    121B  VAL*     3.5     2.8    +      -       -      +
    122B  PHE*     2.9    30.3    +      -       -      +
    165B  MET*     3.4    24.5    -      -       +      +
    169B  HIS*     4.1    17.5    +      -       +      +
    171B  ILE*     4.2    13.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  LEU      4.9     3.8    +      -       -      -
     42B  ARG*     3.0    31.8    +      -       -      +
    112B  CYS*     3.6    16.8    -      -       -      -
    116B  GLN*     3.3    19.3    +      -       -      +
    118B  GLU*     1.3    77.3    -      -       -      +
    120B  LYS*     1.3    59.8    +      -       -      +
    122B  PHE*     3.2     3.8    +      -       -      +
    123B  TYR*     2.9    44.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 120 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  ILE*     5.3    10.1    -      -       +      +
    112B  CYS*     3.8    23.0    -      -       +      +
    113B  SER      5.4     3.1    -      -       -      +
    116B  GLN      3.1    14.0    +      -       -      +
    117B  TYR*     3.6    10.5    -      -       -      +
    119B  SER*     1.3    74.9    -      -       -      +
    121B  VAL*     1.3    57.9    +      -       -      +
    123B  TYR*     3.8     2.0    -      -       -      +
    124B  LEU*     2.8    44.4    +      -       +      +
    156B  GLU*     6.0     0.2    -      -       -      +
    160B  ILE*     4.3    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 121 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117B  TYR*     2.9    24.6    +      -       +      +
    118B  GLU      3.8     2.9    -      -       -      +
    120B  LYS*     1.3    70.8    -      -       -      +
    122B  PHE*     1.3    65.8    +      -       -      +
    124B  LEU*     4.1     0.8    -      -       -      +
    125B  LYS*     2.9    24.0    +      -       +      +
    157B  ALA*     3.9    28.4    -      -       +      +
    160B  ILE*     3.8    24.7    -      -       +      -
    161B  SER*     3.9    17.0    -      -       -      +
    165B  MET*     4.3     6.3    -      -       +      -
    171B  ILE*     3.7    21.3    -      -       +      +
    175B  LEU*     4.0    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 122 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     42B  ARG*     3.6    59.0    -      -       +      +
     43B  ASN*     3.9    21.3    -      -       -      -
     45B  LEU*     6.4     0.2    -      -       +      -
     46B  SER*     3.8    21.3    -      -       -      -
    118B  GLU      2.9    19.6    +      -       -      +
    119B  SER      3.2     4.9    +      -       -      +
    121B  VAL*     1.3    77.4    -      -       -      +
    123B  TYR*     1.3    65.5    +      +       -      +
    125B  LYS*     3.4    12.5    +      -       +      +
    126B  MET*     3.0    45.0    +      -       +      +
    171B  ILE*     4.2    23.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 123 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  LEU*     3.6    22.4    +      -       +      +
     42B  ARG*     3.1    39.1    -      -       +      +
     45B  LEU*     5.0     2.5    -      -       +      -
    104B  LEU*     3.7    21.7    -      -       +      +
    108B  LEU*     3.6    53.9    -      -       +      +
    109B  ILE*     3.6    20.3    -      -       +      +
    112B  CYS*     3.7    10.1    -      -       -      -
    119B  SER*     2.9    38.8    +      -       -      +
    120B  LYS*     4.0     2.0    -      -       -      +
    122B  PHE*     1.3    81.5    -      +       -      +
    124B  LEU*     1.3    59.2    +      -       -      +
    126B  MET*     3.2     7.1    +      -       -      +
    127B  LYS*     2.9    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 124 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  ILE*     4.0    28.3    -      -       +      -
    120B  LYS*     2.8    34.1    +      -       +      +
    123B  TYR*     1.3    69.2    -      -       -      +
    125B  LYS*     1.3    59.9    +      -       -      +
    127B  LYS*     3.4    10.0    +      -       +      +
    128B  GLY*     3.0    22.3    +      -       -      -
    153B  ALA*     3.4    26.8    -      -       -      +
    154B  TYR      4.3     0.2    +      -       -      -
    156B  GLU*     3.8    28.5    -      -       -      +
    157B  ALA*     3.7    25.4    -      -       +      +
    160B  ILE*     3.9    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 125 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121B  VAL*     2.9    19.4    +      -       +      +
    122B  PHE*     3.4    12.4    +      -       +      +
    124B  LEU*     1.3    75.1    -      -       -      +
    126B  MET*     1.3    63.9    -      -       -      +
    128B  GLY*     3.1     2.3    +      -       -      +
    129B  ASP*     2.8    60.4    +      -       -      +
    154B  TYR*     3.8    11.2    -      -       +      -
    157B  ALA*     4.2     0.8    -      -       -      +
    171B  ILE*     4.8     9.4    -      -       +      +
    174B  GLY      3.8    13.2    -      -       -      -
    175B  LEU*     3.8    39.5    -      -       +      +
    178B  ASN*     3.6    19.3    -      -       +      +
    506H  LEU*     4.0    24.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 126 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45B  LEU*     4.8    18.6    -      -       +      +
     46B  SER*     4.2    26.2    -      -       -      +
     49B  TYR*     5.2     2.0    -      -       +      -
    100B  VAL*     3.6    29.8    -      -       +      -
    104B  LEU*     3.9    21.1    -      -       +      -
    122B  PHE*     3.0    38.4    +      -       +      +
    123B  TYR*     3.2    13.2    +      -       -      +
    125B  LYS*     1.3    77.4    -      -       -      +
    127B  LYS*     1.3    59.2    +      -       -      +
    129B  ASP*     3.0    11.9    +      -       -      +
    130B  TYR*     2.8    53.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 127 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  LEU*     3.9     8.0    -      -       +      +
    104B  LEU*     4.0    15.2    -      -       +      +
    105B  ASP*     2.7    37.8    +      -       -      +
    109B  ILE*     4.0    14.6    -      -       +      +
    123B  TYR      2.9    13.7    +      -       -      +
    124B  LEU*     3.6    14.2    -      -       +      +
    125B  LYS      3.2     0.2    -      -       -      -
    126B  MET*     1.3    75.9    -      -       -      +
    128B  GLY*     1.3    62.4    +      -       -      +
    130B  TYR      3.4     0.2    +      -       -      -
    131B  TYR*     3.1    53.6    +      -       +      -
    149B  SER*     5.4     2.2    -      -       -      -
    153B  ALA*     3.7    17.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 128 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124B  LEU      3.0    12.0    +      -       -      -
    125B  LYS      3.5     2.9    -      -       -      -
    127B  LYS*     1.3    79.0    -      -       -      +
    129B  ASP*     1.3    62.3    +      -       -      +
    131B  TYR      3.5     0.2    +      -       -      -
    132B  ARG*     3.0    18.4    +      -       -      +
    150B  SER*     3.0    16.9    +      -       -      -
    153B  ALA*     3.6    14.5    -      -       -      +
    154B  TYR*     3.3    24.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 129 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  LYS*     6.0     1.0    -      -       -      +
    125B  LYS*     2.8    49.2    +      -       -      +
    126B  MET*     3.0    11.3    +      -       -      +
    128B  GLY*     1.3    72.9    -      -       -      +
    130B  TYR*     1.3    62.7    +      -       +      +
    132B  ARG*     3.0     8.2    +      -       -      +
    133B  TYR*     2.9    53.4    +      -       +      +
    154B  TYR*     2.7    26.8    +      -       -      -
    178B  ASN*     2.9    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 130 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  SER      4.5     1.7    +      -       -      -
     49B  TYR*     3.2    31.5    +      -       +      +
     50B  LYS*     3.3    12.2    +      -       +      +
     53B  VAL*     3.8    23.6    -      -       +      -
     96B  VAL*     5.1     0.2    -      -       +      -
     97B  CYS*     3.8    26.1    -      -       +      -
    100B  VAL*     3.9    28.0    -      -       +      -
    101B  LEU*     3.8    24.9    -      -       +      -
    126B  MET*     2.8    55.8    +      -       +      +
    129B  ASP*     1.3    75.0    -      -       +      +
    131B  TYR*     1.3    60.4    +      -       -      +
    133B  TYR*     3.3    22.0    +      +       -      +
    134B  LEU*     3.1    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 131 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  GLN*     5.5     2.3    +      -       -      -
    101B  LEU*     3.8    27.9    -      -       +      +
    105B  ASP*     4.8     6.6    +      -       -      -
    127B  LYS*     3.1    53.7    +      -       +      +
    130B  TYR*     1.3    74.0    -      -       -      +
    132B  ARG*     1.3    54.3    +      -       -      +
    134B  LEU*     3.3    21.8    +      -       +      +
    135B  ALA*     2.8    32.7    +      -       -      +
    145B  THR*     6.4     0.7    -      -       +      -
    146B  VAL*     3.6    22.9    -      -       +      +
    149B  SER*     3.7    36.7    +      -       -      -
    150B  SER*     3.5    22.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 132 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  ARG*     4.1     3.0    -      -       -      +
    128B  GLY      3.0    16.8    +      -       -      +
    129B  ASP*     3.0    27.8    +      -       -      +
    131B  TYR*     1.3    72.8    -      -       -      +
    133B  TYR*     1.3    71.0    +      -       -      +
    135B  ALA*     3.0     8.2    +      -       -      +
    136B  GLU*     2.9    35.5    +      -       -      +
    150B  SER*     3.8    10.9    +      -       -      +
    154B  TYR*     2.9    16.1    +      -       -      +
    178B  ASN*     3.3    20.0    +      -       -      +
    181B  VAL*     4.0    15.8    -      -       -      +
    182B  PHE*     3.9    31.2    -      -       +      +
    186B  ILE*     3.8    19.1    -      -       +      -
    505H  SEP      2.8    45.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 133 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50B  LYS*     3.1    19.3    -      -       -      +
     53B  VAL*     4.1    15.3    -      -       +      -
     57B  ARG*     3.3    44.9    -      -       -      -
     93B  LEU*     4.0    15.3    -      -       +      +
     97B  CYS*     3.9     9.9    -      -       -      -
    129B  ASP*     2.9    38.3    +      -       +      +
    130B  TYR*     3.6    44.4    -      +       -      +
    131B  TYR      3.3     0.2    -      -       -      -
    132B  ARG*     1.3    84.6    -      -       -      +
    134B  LEU*     1.3    65.5    +      -       -      +
    136B  GLU*     3.3    23.1    +      -       -      +
    137B  VAL*     3.8     5.0    +      -       -      +
    178B  ASN*     4.9     0.2    +      -       -      -
    505H  SEP      2.6    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 134 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  LEU*     4.9     0.9    -      -       +      -
     94B  GLU*     3.9    34.2    -      -       +      +
     97B  CYS*     3.6    22.0    -      -       +      -
     98B  GLN*     4.6    10.5    -      -       +      +
    101B  LEU*     4.0    17.0    -      -       +      -
    130B  TYR      3.1    14.7    +      -       -      +
    131B  TYR*     3.4    34.1    -      -       +      +
    133B  TYR*     1.3    75.2    -      -       -      +
    135B  ALA*     1.3    63.0    +      -       -      +
    137B  VAL*     3.2     9.0    +      -       -      +
    138B  ALA*     3.1    23.4    +      -       +      +
    146B  VAL*     3.9    20.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 135 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131B  TYR      2.8    20.6    +      -       -      +
    132B  ARG*     3.0    11.6    +      -       -      +
    134B  LEU*     1.3    73.6    -      -       -      +
    136B  GLU*     1.3    61.3    +      -       -      +
    137B  VAL      3.1     0.9    +      -       -      -
    138B  ALA*     3.4    15.5    +      -       -      +
    143B  ARG*     4.0    13.7    +      -       -      +
    146B  VAL*     3.7    17.9    -      -       +      +
    147B  VAL*     4.0    24.2    -      -       +      +
    182B  PHE*     5.7     0.2    -      -       +      -
    186B  ILE*     4.1    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 136 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  ARG*     2.7    51.0    +      -       -      +
     60B  TRP*     3.8    20.4    -      -       +      -
     61B  ARG*     4.6     8.7    +      -       -      -
    132B  ARG*     2.9    27.3    +      -       -      +
    133B  TYR*     3.5    13.6    -      -       -      +
    134B  LEU      3.3     0.2    -      -       -      -
    135B  ALA*     1.3    77.1    -      -       -      +
    137B  VAL*     1.3    63.2    +      -       +      +
    138B  ALA      4.9     1.0    -      -       -      +
    185B  GLU*     5.2     5.2    -      -       -      +
    186B  ILE*     4.1    16.7    -      -       +      +
    505H  SEP      4.4     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 137 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  TRP*     3.5    49.8    -      -       +      +
     90B  GLU*     4.1    23.0    -      -       +      +
     93B  LEU*     4.0    20.0    -      -       +      -
     94B  GLU*     3.9    30.1    -      -       +      +
    133B  TYR      3.8     8.9    +      -       -      +
    134B  LEU*     3.6    10.1    -      -       -      +
    135B  ALA      3.1     0.2    -      -       -      -
    136B  GLU*     1.3    81.4    -      -       +      +
    138B  ALA*     1.3    66.3    +      -       -      +
    139B  THR*     4.0     9.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 138 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94B  GLU*     5.4     4.9    -      -       -      +
    134B  LEU*     3.1    16.4    +      -       +      +
    135B  ALA      3.4     4.1    +      -       -      +
    136B  GLU      4.9     1.0    -      -       -      +
    137B  VAL*     1.3    82.2    -      -       +      +
    139B  THR*     1.3    64.9    +      -       -      +
    142B  LYS*     4.1    13.7    -      -       +      +
    143B  ARG*     3.2    45.5    +      -       +      +
    146B  VAL*     4.2     7.6    -      -       +      -
----------------------------------------------------------
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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