Contacts of the helix formed by residues 176 - 199 (chain D) in PDB entry 2ONK


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 VAL 176 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  PHE*     4.6     8.7    -      -       +      -
     84B  HIS*     4.4     6.5    -      -       +      -
     93B  TYR*     3.8    16.4    -      -       +      +
    154D  VAL*     4.7     0.9    -      -       +      -
    158D  LEU*     3.9    29.2    -      -       +      +
    159D  GLU*     4.2     7.2    -      -       +      -
    162D  ALA*     3.5    28.9    -      -       +      -
    172D  VAL*     2.6    21.4    +      -       +      +
    175D  THR*     1.3    78.9    -      -       -      +
    177D  SER*     1.3    70.7    +      -       -      +
    179D  PRO*     3.3     1.3    -      -       -      +
    180D  LEU*     3.1    43.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 177 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74D  TYR*     3.6    22.7    +      -       -      -
    151D  PHE*     4.3     7.0    -      -       -      -
    154D  VAL*     4.0     7.2    -      -       -      +
    159D  GLU*     3.0    34.7    +      -       -      +
    172D  VAL*     3.2     2.3    +      -       -      +
    173D  PHE*     3.3    22.0    -      -       -      -
    176D  VAL*     1.3    82.0    -      -       -      +
    178D  LEU*     1.3    66.9    +      -       -      +
    180D  LEU*     3.1     7.4    +      -       -      +
    181D  SER*     3.0    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 178 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70D  THR*     4.4     4.3    -      -       +      -
    151D  PHE*     3.4    20.0    -      -       +      -
    173D  PHE*     2.7    58.9    +      -       +      +
    174D  PHE*     3.9    28.5    -      -       +      +
    177D  SER*     1.3    70.6    -      -       -      +
    179D  PRO*     1.3    63.5    -      -       +      +
    181D  SER*     2.7    27.9    +      -       -      -
    182D  VAL*     2.9    16.4    +      -       +      +
    185D  ILE*     4.2    15.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 179 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  HIS*     4.3    17.8    -      -       +      +
    174D  PHE      3.1    25.1    -      -       -      +
    175D  THR*     3.0    29.4    -      -       -      +
    176D  VAL      3.3     9.2    -      -       -      +
    178D  LEU*     1.3    89.9    -      -       +      +
    180D  LEU*     1.3    58.7    +      -       -      +
    182D  VAL*     3.5    24.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 180 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  PRO*     4.0    16.6    -      -       +      -
     84B  HIS*     3.5    40.6    -      -       +      +
    153D  SER*     4.9     4.2    +      -       -      -
    154D  VAL*     3.4    38.2    -      -       +      +
    158D  LEU*     3.9    15.3    -      -       +      -
    176D  VAL*     3.1    34.9    +      -       +      +
    177D  SER      3.1     0.4    +      -       -      -
    178D  LEU      2.8     1.8    +      -       -      -
    179D  PRO*     1.3    82.3    -      -       -      +
    181D  SER*     1.3    57.1    +      -       -      +
    182D  VAL      3.3     1.5    +      -       -      -
    183D  ARG*     4.9     2.8    +      -       -      +
    184D  HIS*     5.0     2.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 181 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147D  ALA      5.2     0.2    -      -       -      -
    150D  GLY*     3.4    34.8    -      -       -      -
    151D  PHE*     3.5    25.3    -      -       -      -
    154D  VAL*     4.5     1.3    -      -       -      -
    177D  SER      3.0    14.9    +      -       -      -
    178D  LEU*     2.7     8.1    +      -       -      -
    180D  LEU*     1.3    71.9    -      -       -      +
    182D  VAL*     1.3    66.5    +      -       -      +
    183D  ARG      3.3     2.7    -      -       -      -
    184D  HIS*     2.7    22.2    +      -       -      +
    185D  ILE*     3.0    16.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 182 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178D  LEU*     2.9    21.5    +      -       +      +
    179D  PRO*     3.5    22.9    -      -       +      +
    180D  LEU      3.3     1.6    -      -       -      -
    181D  SER*     1.3    76.8    -      -       -      +
    183D  ARG*     1.3    54.4    +      -       -      +
    184D  HIS      2.6    12.5    +      -       -      -
    185D  ILE*     2.9    12.2    +      -       +      -
    186D  VAL*     2.8    40.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 183 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180D  LEU      4.9     2.9    +      -       -      +
    181D  SER      3.2     1.6    +      -       -      -
    182D  VAL*     1.3    78.7    -      -       -      +
    184D  HIS*     1.3    64.8    +      -       +      +
    186D  VAL*     4.5     7.4    -      -       +      +
    187D  ALA*     3.6    19.8    +      -       -      +
    251D  VAL*     4.5    32.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 184 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146D  GLN*     3.7    32.7    +      -       -      +
    147D  ALA*     5.0     0.9    -      -       -      -
    149D  GLU*     4.3    13.5    -      -       +      +
    150D  GLY*     3.2    35.4    +      -       -      -
    153D  SER*     3.7    22.4    +      -       -      -
    180D  LEU      5.0     2.0    -      -       -      -
    181D  SER*     2.7    20.0    +      -       -      +
    182D  VAL      2.6     4.9    +      -       -      -
    183D  ARG*     1.3    79.2    +      -       +      +
    185D  ILE*     1.3    56.1    +      -       -      +
    186D  VAL      3.2     1.1    -      -       -      -
    187D  ALA*     3.7     0.6    -      -       -      +
    188D  GLY*     2.7    32.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 185 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66D  VAL*     4.7    11.7    -      -       +      -
     70D  THR*     4.5     7.6    -      -       +      +
    143D  TYR*     3.1    32.3    -      -       +      +
    147D  ALA*     4.9    12.1    -      -       +      +
    151D  PHE*     4.4    11.0    -      -       +      -
    178D  LEU*     4.2    29.4    -      -       +      +
    181D  SER*     3.0    21.5    +      -       -      +
    182D  VAL*     2.9    13.2    +      -       +      +
    184D  HIS*     1.3    78.4    -      -       +      +
    186D  VAL*     1.3    59.0    +      -       +      +
    189D  ALA*     2.8    29.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 186 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182D  VAL*     2.8    33.6    +      -       +      +
    183D  ARG*     4.5     7.0    -      -       +      +
    185D  ILE*     1.3    79.8    -      -       +      +
    187D  ALA*     1.3    66.1    +      -       -      +
    189D  ALA*     3.2     6.9    +      -       -      +
    190D  ILE*     2.9    38.5    +      -       +      +
    251D  VAL*     4.7    20.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 187 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146D  GLN*     4.1    11.9    -      -       -      +
    183D  ARG      3.6    17.7    +      -       -      +
    184D  HIS*     3.3     5.4    +      -       -      +
    186D  VAL*     1.3    82.4    -      -       +      +
    188D  GLY*     1.3    65.6    +      -       -      +
    190D  ILE*     3.1     8.8    +      -       -      +
    191D  MET*     2.8    35.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 188 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    142D  ILE      4.9     0.2    -      -       -      -
    143D  TYR*     3.4    17.5    -      -       -      -
    146D  GLN*     3.5    26.2    -      -       -      +
    184D  HIS      2.7    21.0    +      -       -      -
    185D  ILE      3.7     1.1    -      -       -      -
    187D  ALA*     1.3    75.0    -      -       -      +
    189D  ALA*     1.3    61.8    +      -       -      +
    191D  MET*     3.2     4.1    +      -       -      +
    192D  SER*     3.0    23.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 189 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  THR*     3.9    22.9    +      -       +      -
     66D  VAL*     4.1    13.5    -      -       +      -
    143D  TYR*     3.4     8.6    -      -       -      -
    185D  ILE*     2.8    20.6    +      -       +      +
    186D  VAL*     3.2     6.7    +      -       -      +
    188D  GLY*     1.3    72.0    -      -       -      +
    190D  ILE*     1.3    66.0    +      -       +      +
    192D  SER*     2.9    16.3    +      -       -      -
    193D  TRP*     2.9    12.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 190 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186D  VAL*     2.9    31.7    +      -       +      +
    187D  ALA*     3.5    10.1    -      -       -      +
    189D  ALA*     1.3    76.8    -      -       +      +
    191D  MET*     1.3    60.6    +      -       +      +
    193D  TRP*     3.2     9.6    +      -       +      +
    194D  ALA*     3.0    26.0    +      -       -      +
    244D  PHE*     4.0    23.5    -      -       +      -
    247D  LEU*     3.6    46.2    -      -       +      +
    251D  VAL*     5.3     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 191 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95C  VAL*     5.2    10.8    -      -       +      +
    145C  ASN*     5.6     7.6    -      -       -      +
    142D  ILE*     3.9    19.0    -      -       +      +
    146D  GLN*     3.3    37.9    -      -       +      +
    187D  ALA*     2.8    30.0    +      -       +      +
    188D  GLY      3.5     4.5    -      -       -      +
    190D  ILE*     1.3    81.4    -      -       +      +
    192D  SER*     1.3    61.1    +      -       -      +
    194D  ALA*     3.3     8.3    +      -       -      +
    195D  ARG*     3.1    20.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 192 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61D  SER*     4.7     1.6    +      -       -      -
     62D  THR*     2.8    30.8    +      -       -      +
     65D  ALA*     4.7     3.7    -      -       -      +
    139D  SER*     3.4    38.6    +      -       -      -
    142D  ILE*     3.8     5.6    -      -       -      +
    143D  TYR*     4.1    13.5    -      -       -      +
    188D  GLY      3.0    12.0    +      -       -      -
    189D  ALA*     2.9     8.0    +      -       -      -
    191D  MET*     1.3    73.0    -      -       -      +
    193D  TRP*     1.3    64.3    +      -       -      +
    195D  ARG*     3.3     1.2    +      -       -      -
    196D  GLY*     3.1    18.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 193 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55D  TYR*     3.2    49.8    +      +       +      -
     58D  ALA*     3.5     9.7    -      -       +      +
     59D  LEU*     3.4    41.6    -      -       +      +
     62D  THR*     3.4    13.0    -      -       +      +
    189D  ALA      2.9     9.5    +      -       -      +
    190D  ILE*     3.4    11.9    -      -       -      +
    192D  SER*     1.3    75.9    +      -       -      +
    194D  ALA*     1.3    64.4    +      -       -      +
    195D  ARG      3.0     0.3    +      -       -      -
    196D  GLY*     3.2     1.8    +      -       -      +
    197D  ILE*     3.0    56.1    +      -       +      +
    243D  VAL*     3.7    24.2    -      -       +      -
    244D  PHE*     3.7    31.4    -      +       -      -
    247D  LEU*     5.2     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 194 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95C  VAL*     3.6    26.8    -      -       +      +
     96C  VAL*     4.8     1.7    -      -       +      -
    190D  ILE      3.0     8.2    +      -       -      +
    191D  MET*     3.3    11.9    +      -       -      +
    193D  TRP*     1.3    76.8    -      -       -      +
    195D  ARG*     1.3    60.8    +      -       -      +
    197D  ILE*     3.8     6.4    -      -       -      +
    198D  SER*     3.0    29.3    +      -       -      -
    244D  PHE*     3.6    35.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 195 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95C  VAL*     5.1     4.7    -      -       +      +
     99C  HIS*     3.9    12.3    +      -       -      -
    195C  ARG*     4.9     7.7    -      -       -      +
     99D  HIS*     3.3    24.5    -      -       -      -
    138D  VAL*     2.7    45.0    +      -       +      +
    139D  SER*     3.6    21.3    -      -       -      -
    142D  ILE*     4.0    21.0    -      -       +      +
    191D  MET      3.1    12.2    +      -       -      +
    192D  SER      3.4     9.4    -      -       -      +
    193D  TRP      3.0     0.4    -      -       -      -
    194D  ALA*     1.3    75.6    -      -       -      +
    196D  GLY*     1.3    67.2    +      -       -      +
    198D  SER*     3.1    13.1    +      -       -      -
    199D  GLU*     2.7    42.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 196 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58D  ALA*     4.1     4.9    -      -       -      -
     61D  SER*     5.0     1.1    -      -       -      -
    135D  MET*     2.9    50.9    -      -       -      +
    139D  SER*     4.4     0.8    -      -       -      -
    192D  SER      3.1    10.8    +      -       -      -
    193D  TRP      3.7     1.6    -      -       -      -
    195D  ARG*     1.3    78.5    -      -       -      +
    197D  ILE*     1.3    64.1    +      -       -      +
    199D  GLU*     3.0    16.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 197 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96C  VAL      4.3    10.3    -      -       -      +
     98C  PRO*     4.1     7.0    -      -       +      +
     54D  THR*     3.8    19.1    -      -       +      +
     55D  TYR*     3.2    44.0    -      -       +      -
     58D  ALA*     3.6    13.2    -      -       +      +
    135D  MET*     4.2     0.9    -      -       -      -
    193D  TRP*     3.0    51.5    +      -       +      +
    194D  ALA*     3.8     7.4    -      -       -      +
    196D  GLY*     1.3    76.2    -      -       -      +
    198D  SER*     1.3    67.1    +      -       -      +
    199D  GLU      3.4     0.9    +      -       -      +
    212D  ILE*     4.4     0.7    -      -       -      +
    213D  ALA*     5.6     0.2    -      -       -      +
    214D  PRO*     3.5    17.8    -      -       -      +
    240D  SER*     5.1     4.7    -      -       -      +
    244D  PHE*     4.9     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 198 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94C  PRO      5.6     0.7    -      -       -      -
     95C  VAL      3.6    10.0    +      -       -      -
     96C  VAL      3.5    19.9    +      -       -      -
     97C  ILE      3.6     4.5    -      -       -      -
     98C  PRO*     3.4    23.5    -      -       -      +
     99C  HIS*     3.2    37.6    +      -       -      +
    194D  ALA      3.0    16.9    +      -       -      -
    195D  ARG*     3.1     8.7    +      -       -      -
    197D  ILE*     1.3    76.9    -      -       -      +
    199D  GLU*     1.3    63.8    -      -       -      +
    214D  PRO*     4.1     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 199 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  HIS*     3.0    11.4    +      -       -      -
     99D  HIS*     3.5    11.5    +      -       -      +
    135D  MET*     4.8     3.4    -      -       +      -
    138D  VAL*     4.2     9.2    -      -       +      -
    195D  ARG*     2.7    44.8    +      -       -      +
    196D  GLY*     3.0    18.3    +      -       -      +
    197D  ILE      4.1     1.0    -      -       -      +
    198D  SER*     1.3    77.2    -      -       -      +
    200D  PHE*     1.3    62.6    +      -       -      +
    201D  GLY      3.6     0.7    +      -       -      -
    202D  ALA*     2.6    41.7    +      -       +      +
    203D  VAL*     3.6    28.9    -      -       +      +
    212D  ILE*     4.2     7.8    -      -       -      +
    214D  PRO*     3.3    19.6    -      -       -      +
----------------------------------------------------------
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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