Contacts of the helix formed by residues 153 - 174 (chain I) in PDB entry 6GYS


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 SER 153 (chain I).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146I  ARG*     5.8     0.5    -      -       -      -
    151I  ASN      2.9    11.0    +      -       -      -
    152I  HIS*     1.3    71.0    -      -       -      +
    154I  VAL*     1.3    54.5    +      -       -      +
    155I  ASP*     4.7     0.3    +      -       -      +
    156I  GLY*     3.0    20.3    +      -       -      -
    157I  LYS*     2.6    35.9    +      -       -      +
     85J  LEU      3.7     0.4    -      -       -      -
     86J  THR*     3.3    38.2    -      -       -      -
     87J  ARG*     4.7     1.3    -      -       -      -
     88J  THR      3.4     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 154 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153I  SER*     1.3    69.7    -      -       -      +
    155I  ASP*     1.3    58.7    +      -       -      +
    157I  LYS*     3.1    11.9    +      -       -      +
    158I  TYR*     3.0    45.7    +      -       +      -
    222I  GLN      5.2     0.2    -      -       -      +
    223I  CYS*     3.3    29.7    -      -       -      +
    224I  ASP*     5.8     1.6    -      -       -      +
    228I  HIS*     4.0    11.9    -      -       +      +
     85J  LEU*     2.9    28.4    +      -       +      +
     88J  THR*     3.1    33.9    +      -       +      +
     89J  PRO      3.8    12.8    -      -       -      +
     90J  ALA*     4.8     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 155 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153I  SER*     5.1     0.2    +      -       -      -
    154I  VAL*     1.3    76.8    -      -       -      +
    156I  GLY*     1.3    57.0    +      -       -      +
    158I  TYR*     3.0     6.7    +      -       -      -
    159I  TRP*     2.8    46.6    +      -       -      -
    230I  ASP*     4.7     1.4    -      -       -      +
    232I  ARG*     2.4    41.4    +      -       -      +
     85J  LEU*     2.9    32.0    +      -       +      +
     86J  THR*     3.8    23.1    -      -       +      +
    560J  LYS*     4.1    13.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 156 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146I  ARG*     3.5    13.4    +      -       -      -
    153I  SER*     3.0    24.2    +      -       -      -
    155I  ASP*     1.3    78.9    +      -       -      +
    157I  LYS*     1.3    55.9    +      -       -      +
    159I  TRP*     3.2    14.0    +      -       -      +
    160I  ASP*     2.8    37.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 157 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152I  HIS*     3.7    34.9    +      -       +      -
    153I  SER      2.6    22.0    +      -       -      +
    154I  VAL*     3.1    10.7    +      -       -      +
    156I  GLY*     1.3    70.6    -      -       -      +
    158I  TYR*     1.3    59.1    +      -       -      +
    160I  ASP*     3.2    11.1    +      -       -      +
    161I  ALA*     2.9    29.3    +      -       -      +
    219I  GLN*     3.1    47.5    -      -       -      +
    222I  GLN*     2.9    32.7    +      -       -      -
    223I  CYS*     3.5    15.6    -      -       -      -
     90J  ALA*     3.8    18.8    -      -       +      -
     92J  LEU*     5.2     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 158 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154I  VAL*     3.0    46.6    +      -       +      -
    155I  ASP*     3.0     2.2    +      -       -      +
    157I  LYS*     1.3    74.8    -      -       -      +
    159I  TRP*     1.3    59.0    +      -       -      +
    161I  ALA*     3.4     3.3    +      -       -      +
    162I  LEU*     2.8    30.3    +      -       -      +
    220I  LEU*     3.6    18.2    -      -       +      +
    223I  CYS*     3.5    23.2    +      -       +      -
    225I  PHE*     3.3    20.4    -      -       +      -
    228I  HIS*     2.3    37.3    +      -       +      +
    230I  ASP*     4.9    12.8    -      -       +      -
    232I  ARG*     3.2    39.5    -      -       +      +
    233I  LEU*     4.5    21.3    -      -       +      -
     85J  LEU*     4.6     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 159 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    135I  GLU*     3.9    21.8    -      -       +      -
    139I  ARG*     3.5    38.8    -      -       +      +
    146I  ARG*     3.7    23.3    +      -       -      +
    155I  ASP*     2.8    45.5    +      -       -      -
    156I  GLY*     3.2    10.5    +      -       -      +
    158I  TYR*     1.3    75.0    -      -       -      +
    160I  ASP*     1.3    62.9    +      -       -      +
    162I  LEU*     3.4    46.8    -      -       +      +
    163I  ILE*     3.5    10.2    +      -       -      +
    232I  ARG*     2.9    38.5    -      -       -      +
    560J  LYS      4.5     1.8    -      -       -      -
    561J  GLY      4.4     3.6    -      -       -      -
    562J  LEU      4.5     2.2    -      -       -      -
    563J  GLY*     3.5    28.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 160 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143I  TYR*     3.1    21.9    -      -       +      -
    146I  ARG*     2.4    49.5    +      -       -      +
    152I  HIS*     4.8     4.3    -      -       -      -
    156I  GLY      2.8    24.2    +      -       -      +
    157I  LYS*     3.4    20.8    +      -       -      +
    159I  TRP*     1.3    76.6    -      -       -      +
    161I  ALA*     1.3    60.1    +      -       -      +
    163I  ILE*     3.3    17.2    -      -       -      +
    164I  TRP*     3.1    15.4    +      -       -      -
    219I  GLN*     3.1    22.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 161 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157I  LYS      2.9    14.8    +      -       -      +
    158I  TYR      4.0     1.1    -      -       -      +
    160I  ASP*     1.3    73.2    -      -       -      +
    162I  LEU*     1.3    66.1    +      -       -      +
    164I  TRP*     3.2     6.9    +      -       -      -
    165I  SER*     3.0    13.9    +      -       -      -
    216I  SER*     2.9    47.3    +      -       -      +
    219I  GLN*     2.9    13.9    +      -       +      +
    220I  LEU*     3.7    20.0    -      -       +      -
    236I  ALA*     5.5     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 162 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130I  ILE*     5.1    22.7    -      -       +      -
    136I  LEU*     4.0    23.3    -      -       +      -
    139I  ARG*     5.5     0.2    -      -       +      -
    158I  TYR      2.8    20.0    +      -       -      +
    159I  TRP*     3.4    41.5    -      -       +      +
    160I  ASP      3.2     0.2    -      -       -      -
    161I  ALA*     1.3    75.4    -      -       -      +
    163I  ILE*     1.3    59.0    +      -       +      +
    165I  SER*     2.3    32.3    +      -       -      +
    166I  VAL*     2.9    18.4    +      -       +      +
    232I  ARG*     4.8    14.8    -      -       +      +
    235I  GLN*     5.1     4.3    -      -       -      +
    236I  ALA*     4.3    20.4    -      -       +      +
    239I  ILE*     6.0     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 163 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136I  LEU*     3.8    23.1    -      -       +      -
    139I  ARG*     4.3    11.9    -      -       +      +
    140I  VAL*     4.0    18.4    -      -       +      +
    143I  TYR*     3.5    46.0    -      -       +      -
    159I  TRP      3.7    11.2    -      -       -      +
    160I  ASP      3.3    16.1    +      -       -      +
    162I  LEU*     1.3    74.6    -      -       +      +
    164I  TRP*     1.3    61.8    +      -       +      +
    166I  VAL*     3.5     8.5    -      -       +      +
    167I  PHE*     2.8    61.4    +      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 164 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99I  CYS*     5.2     0.4    -      -       -      -
    102I  TRP*     3.3    37.9    -      -       +      -
    103I  MET*     3.5    16.8    -      -       +      -
    106I  LEU*     4.5     6.1    -      -       +      -
    143I  TYR*     3.3    24.4    +      +       -      -
    147I  ARG*     3.8     4.0    -      -       -      -
    160I  ASP      3.1    15.1    +      -       -      -
    161I  ALA*     3.2     8.3    +      -       -      +
    163I  ILE*     1.3    79.9    -      -       +      +
    165I  SER*     1.3    51.2    +      -       -      +
    167I  PHE*     3.3    12.2    +      +       -      +
    168I  THR*     2.7    37.6    +      -       -      -
    212I  PHE*     3.3    54.5    -      +       -      +
    215I  CYS*     3.4    29.4    +      -       +      -
    216I  SER      3.5     5.4    -      -       -      +
    219I  GLN*     3.0    39.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 165 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161I  ALA      3.0     9.1    +      -       -      -
    162I  LEU*     2.3    32.6    +      -       -      +
    164I  TRP*     1.3    76.3    -      -       -      +
    166I  VAL*     1.3    62.0    +      -       -      +
    168I  THR*     3.2    10.8    -      -       -      -
    169I  MET      3.0    17.7    +      -       -      -
    216I  SER*     4.0     6.1    -      -       -      -
    236I  ALA*     3.5    38.7    -      -       -      +
    239I  ILE*     3.3    15.6    -      -       -      +
    240I  LEU*     4.1    12.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 166 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115I  MET*     3.6    30.7    -      -       +      -
    126I  TYR*     6.3     2.0    -      -       +      -
    130I  ILE*     5.4     3.6    -      -       +      -
    136I  LEU*     3.7    36.6    -      -       +      -
    162I  LEU*     2.9    25.3    +      -       +      +
    163I  ILE*     3.5    10.3    -      -       -      +
    164I  TRP      3.2     0.2    -      -       -      -
    165I  SER*     1.3    76.8    -      -       -      +
    167I  PHE*     1.3    58.3    +      -       -      +
    169I  MET*     3.2    13.6    +      -       +      +
    170I  CYS*     2.9    36.9    +      -       -      -
    239I  ILE*     4.6    10.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 167 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106I  LEU*     3.7    29.6    -      -       +      -
    111I  SER*     3.6    31.0    -      -       -      -
    114I  LEU*     4.3    14.4    -      -       +      -
    115I  MET*     3.8    27.1    -      -       +      -
    140I  VAL*     4.5     4.9    -      -       +      -
    163I  ILE*     2.8    53.7    +      -       +      +
    164I  TRP*     3.6    21.8    -      +       -      +
    165I  SER      3.3     0.2    -      -       -      -
    166I  VAL*     1.3    73.9    -      -       -      +
    168I  THR*     1.3    59.7    +      -       -      +
    170I  CYS*     3.2     6.2    +      -       -      +
    171I  ILE*     2.9    35.0    +      -       -      +
    212I  PHE*     3.6    22.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with THR 168 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164I  TRP      2.7    20.9    +      -       -      -
    165I  SER*     3.2    10.5    -      -       -      -
    167I  PHE*     1.3    75.6    -      -       -      +
    169I  MET*     1.3    57.2    +      -       -      +
    171I  ILE*     3.2     3.0    +      -       -      +
    172I  TYR*     3.0    21.8    +      -       -      +
    209I  CYS*     3.3    41.6    -      -       -      +
    212I  PHE*     3.1     8.5    +      -       -      +
    213I  ALA*     3.0    25.5    +      -       +      -
    239I  ILE      5.5     0.4    -      -       -      +
    240I  LEU*     3.7    20.4    -      -       +      -
    243I  THR*     3.8    13.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 169 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118I  ALA*     5.7     1.8    -      -       +      -
    122I  LEU*     3.9    24.4    -      -       +      +
    125I  LEU*     4.0    22.2    -      -       +      -
    126I  TYR*     4.1    35.7    -      -       +      +
    165I  SER      3.0     5.7    +      -       -      -
    166I  VAL*     3.2    17.2    +      -       +      +
    168I  THR*     1.3    77.6    -      -       -      +
    170I  CYS*     1.3    61.5    +      -       -      +
    172I  TYR*     3.0    24.0    +      -       +      +
    173I  TYR*     3.4    14.4    +      -       +      -
    239I  ILE*     3.7    41.0    +      -       +      -
    242I  THR*     4.1    16.2    -      -       -      +
    243I  THR*     5.0     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 170 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114I  LEU*     3.7    40.7    -      -       +      +
    115I  MET*     4.4     6.5    -      -       -      -
    117I  PHE*     5.6     1.0    -      -       -      -
    118I  ALA*     3.7    30.3    -      -       +      -
    122I  LEU*     4.8     2.4    -      -       -      +
    166I  VAL*     2.9    37.6    +      -       -      +
    167I  PHE*     3.2     6.9    +      -       -      +
    169I  MET*     1.3    77.0    -      -       -      +
    171I  ILE*     1.3    62.4    +      -       -      +
    173I  TYR      4.1     0.5    -      -       -      -
    174I  MET*     3.1    28.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 171 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114I  LEU*     3.8    15.5    -      -       +      -
    167I  PHE      2.9    19.0    +      -       -      +
    168I  THR      3.6     7.2    -      -       -      +
    170I  CYS*     1.3    75.3    -      -       -      +
    172I  TYR*     1.3    62.3    +      -       -      +
    173I  TYR      3.1     1.4    +      -       -      -
    174I  MET*     3.5     5.2    +      -       -      +
    179I  LEU*     3.7    25.1    -      -       +      -
    183I  PHE*     4.2     2.5    -      -       +      -
    205I  GLN*     3.3    58.2    +      -       +      +
    206I  LEU*     5.4     0.2    -      -       -      -
    208I  MET*     3.7    16.8    -      -       +      -
    209I  CYS*     3.7    13.0    -      -       +      +
    212I  PHE*     3.5    26.7    -      -       +      -
    499I  ILE*     3.8     2.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 172 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168I  THR      3.0    12.4    +      -       -      +
    169I  MET*     3.0    16.8    +      -       -      +
    171I  ILE*     1.3    77.6    -      -       -      +
    173I  TYR*     1.3    85.7    +      +       +      +
    206I  LEU*     4.4     3.1    -      -       +      -
    209I  CYS*     4.2    10.3    -      -       -      -
    242I  THR*     3.2    25.8    -      -       -      -
    243I  THR*     3.6    16.4    -      -       +      -
    244I  THR*     3.3    39.5    -      -       +      +
    455I  ARG*     2.7    46.4    +      -       -      -
    457I  PRO*     3.2    16.7    -      -       +      +
    499I  ILE*     3.3    27.6    -      -       +      +
    500I  PHE*     3.9     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 173 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117I  PHE*     4.0     4.7    -      -       +      -
    122I  LEU*     3.6    38.1    -      -       +      -
    125I  LEU*     3.8    18.5    -      -       +      +
    169I  MET*     3.4    12.2    +      -       +      -
    170I  CYS      4.1     0.4    -      -       -      -
    171I  ILE      3.2     0.2    -      -       -      -
    172I  TYR*     1.3    98.4    -      +       -      +
    174I  MET*     1.3    62.1    +      -       -      +
    175I  PRO*     3.3     2.9    -      -       -      +
    242I  THR*     5.3     3.1    -      -       -      -
    398I  PHE*     4.2    13.5    -      +       -      -
    452I  PHE*     3.2    59.9    -      +       +      +
    455I  ARG*     3.0    31.4    -      -       +      +
    456I  HIS*     3.1    44.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 174 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114I  LEU*     3.7    33.0    -      -       +      -
    117I  PHE*     3.6    41.3    -      -       +      -
    170I  CYS*     3.1    20.5    +      -       +      +
    171I  ILE      3.5     3.0    +      -       -      +
    173I  TYR*     1.3    76.4    -      -       -      +
    175I  PRO*     1.3    76.9    -      -       +      +
    178I  LYS*     3.8    12.1    -      -       +      -
    179I  LEU*     3.8    29.6    -      -       +      +
    182I  ILE*     3.7    21.1    -      -       +      -
    205I  GLN*     2.9    19.6    +      -       -      -
    455I  ARG*     2.5    20.4    +      -       -      -
----------------------------------------------------------
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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