Contacts of the helix formed by residues 183 - 204 (chain A) in PDB entry 2AXZ


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 GLY 183 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181A  SER*     3.7     4.4    +      -       -      -
    182A  PHE*     1.3    76.0    -      -       -      +
    184A  LYS*     1.3    59.7    +      -       -      -
    185A  ASP*     3.3     3.6    -      -       -      -
    186A  TYR*     3.2     3.6    +      -       -      +
    187A  ASP*     2.7    34.5    +      -       -      +
     59B  PHE*     5.8     0.7    -      -       -      -
     60B  GLU*     5.8     0.4    -      -       -      -
     63B  ASN*     2.9    23.8    -      -       -      +
    300B  GLU*     5.7     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  GLY*     1.3    69.4    -      -       -      -
    185A  ASP*     1.3    61.2    +      -       -      +
    187A  ASP*     3.2    10.3    +      -       -      +
    188A  LEU*     2.9    28.6    +      -       -      +
    227A  SER*     4.4    15.2    +      -       -      +
    184B  LYS*     3.4    52.5    +      -       +      +
    185B  ASP*     3.1    31.1    +      -       -      +
    188B  LEU*     4.4    16.0    -      -       -      +
    298B  TYR*     5.9     2.4    -      -       -      -
    299B  TYR      5.3     2.6    +      -       -      -
    300B  GLU*     3.7    29.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  THR*     5.7     0.9    +      -       -      -
    183A  GLY*     3.3     0.8    -      -       -      -
    184A  LYS*     1.3    77.7    -      -       -      +
    186A  TYR*     1.3    61.7    +      -       -      +
    188A  LEU*     3.5     9.2    +      -       -      +
    189A  THR*     3.3    29.1    +      -       -      +
    299A  TYR      5.7     1.0    -      -       -      +
    300A  GLU*     5.4     1.9    -      -       -      +
     57B  ASN*     4.1    14.8    +      -       +      +
     59B  PHE*     5.1    11.3    -      -       -      +
    184B  LYS*     3.3    24.4    +      -       -      +
      7E  VAL*     3.4    34.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  PHE      4.3     3.8    +      -       -      -
    150A  GLY*     3.6    29.4    -      -       -      -
    153A  TYR*     4.1    15.0    +      +       -      -
    178A  ILE*     3.5    20.5    -      -       +      +
    180A  ASP      3.5    22.2    +      -       -      -
    181A  SER*     4.4     0.2    -      -       -      -
    182A  PHE*     3.5    43.1    -      +       +      +
    183A  GLY      3.2     9.3    +      -       -      +
    184A  LYS      3.1     0.4    -      -       -      -
    185A  ASP*     1.3    77.6    -      -       -      +
    187A  ASP*     1.3    70.4    +      -       -      +
    189A  THR*     3.1    20.0    +      -       -      -
    190A  ILE*     3.1    39.7    +      -       +      +
     60B  GLU*     4.0    14.1    +      -       +      +
     64B  ARG*     3.8    18.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 187 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181A  SER*     2.7    29.5    +      -       -      -
    183A  GLY      2.7    21.6    +      -       -      +
    184A  LYS*     3.2    11.1    +      -       -      +
    186A  TYR*     1.3    84.7    -      -       -      +
    188A  LEU*     1.3    62.9    +      -       -      +
    190A  ILE*     3.2    14.3    -      -       +      +
    191A  GLN*     3.2    29.7    +      -       -      +
    225A  ASN      3.8     1.7    -      -       -      +
    226A  ILE*     2.6    38.0    -      -       +      +
    227A  SER*     3.9     9.8    -      -       -      +
    300B  GLU*     4.7     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  LYS      2.9    15.6    +      -       -      +
    185A  ASP*     3.6    11.0    -      -       -      +
    186A  TYR      3.1     0.4    -      -       -      -
    187A  ASP*     1.3    78.6    -      -       -      +
    189A  THR*     1.3    58.3    +      -       -      +
    191A  GLN*     3.3     7.0    +      -       -      +
    192A  THR*     2.8    30.8    +      -       -      +
    229A  ASN*     4.2    15.9    -      -       +      +
    232A  TYR*     3.7    25.4    -      -       +      +
    298A  TYR*     3.9    25.8    -      -       +      -
    299A  TYR      4.6     8.3    -      -       -      +
    184B  LYS*     5.4     8.5    -      -       -      +
      5E  VAL*     3.6    27.8    -      -       +      -
      7E  VAL*     4.8    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  GLY*     3.3    31.2    +      -       -      +
    153A  TYR*     3.6    10.3    -      -       -      +
    154A  GLU*     4.0    16.6    -      -       +      +
    185A  ASP      3.3    15.8    +      -       -      +
    186A  TYR      3.1    10.2    +      -       -      -
    188A  LEU*     1.3    73.0    -      -       +      +
    190A  ILE*     1.3    67.8    +      -       -      +
    191A  GLN      3.1     2.2    -      -       -      -
    192A  THR*     3.1    18.6    +      -       -      -
    193A  VAL*     3.2    18.4    +      -       -      +
      5E  VAL*     4.3    10.3    -      -       +      -
      7E  VAL*     3.7    22.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  TYR*     3.6    37.0    -      -       +      -
    176A  TYR*     2.8    26.1    +      -       +      +
    178A  ILE*     4.2    21.1    -      -       +      -
    186A  TYR*     3.1    38.1    -      -       +      +
    187A  ASP*     3.2    32.1    -      -       +      +
    189A  THR*     1.3    81.2    +      -       -      +
    191A  GLN*     1.3    66.4    +      -       +      +
    194A  LEU*     3.6    13.2    +      -       -      +
    220A  LEU*     4.6     6.1    -      -       +      -
    226A  ILE*     4.3    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  ASP*     3.2    25.0    +      -       -      +
    188A  LEU*     3.3     3.5    +      -       -      +
    189A  THR      3.1     0.4    -      -       -      -
    190A  ILE*     1.3    81.7    -      -       +      +
    192A  THR*     1.3    59.4    +      -       -      +
    194A  LEU*     3.3     7.1    +      -       -      +
    195A  LYS*     3.0    28.1    +      -       -      +
    217A  PHE*     3.7    19.8    -      -       +      -
    220A  LEU*     3.9    24.2    -      -       +      -
    226A  ILE*     4.4     2.6    -      -       -      +
    227A  SER      3.3     9.5    +      -       -      -
    228A  ILE*     3.1    32.0    -      -       -      +
    229A  ASN*     2.9    31.0    +      -       -      +
    232A  TYR*     3.6    18.6    -      -       +      +
    236A  ILE*     4.6     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157A  SER*     2.8    23.8    -      -       -      +
    188A  LEU*     2.8    21.9    +      -       -      +
    189A  THR      3.1     7.7    +      -       -      -
    191A  GLN*     1.3    74.8    -      -       -      +
    193A  VAL*     1.3    60.0    +      -       -      +
    195A  LYS*     3.6     2.8    -      -       -      +
    196A  ASN*     2.8    43.4    +      -       -      +
    232A  TYR*     2.9    29.3    +      -       -      +
      3E  THR*     3.7     9.2    -      -       -      +
      5E  VAL*     3.1    27.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  TYR*     3.0    41.1    -      -       +      +
    156A  VAL*     4.1    20.0    -      -       +      -
    157A  SER*     3.4    13.0    +      -       -      +
    160A  LEU*     4.0     9.0    -      -       +      +
    172A  ILE*     4.2    11.7    -      -       +      -
    175A  MSE      5.8     0.4    -      -       -      -
    176A  TYR*     3.0    35.7    -      -       +      +
    189A  THR      3.2    10.3    +      -       -      +
    191A  GLN      3.3     0.2    -      -       -      -
    192A  THR*     1.3    74.9    -      -       -      +
    194A  LEU*     1.3    54.9    +      -       +      +
    196A  ASN*     3.9     1.4    -      -       -      +
    197A  ALA*     2.9    33.3    +      -       +      +
    213A  TYR*     5.7     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176A  TYR*     3.5    25.4    -      -       +      -
    190A  ILE      3.6    13.2    +      -       -      +
    191A  GLN*     3.3     6.2    +      -       -      +
    192A  THR      3.3     0.4    -      -       -      -
    193A  VAL*     1.3    73.5    -      -       -      +
    195A  LYS*     1.3    61.0    +      -       -      +
    197A  ALA*     3.9     3.5    -      -       -      +
    198A  LEU*     2.8    34.2    +      -       -      +
    213A  TYR*     3.7    28.7    -      -       +      +
    216A  GLN*     3.4    26.0    -      -       +      -
    217A  PHE*     3.6    27.1    -      -       +      +
    220A  LEU*     3.5    31.9    -      -       +      -
    236A  ILE*     5.1     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  GLN      3.0    17.4    +      -       -      +
    192A  THR*     3.6     3.4    -      -       -      +
    194A  LEU*     1.3    77.1    -      -       -      +
    196A  ASN*     1.3    65.4    +      -       -      +
    198A  LEU*     3.9     4.3    -      -       -      +
    199A  THR*     2.7    33.8    +      -       -      +
    232A  TYR*     3.2    51.4    -      -       +      -
    235A  GLU*     3.2    26.3    +      -       +      +
    236A  ILE*     4.1    23.9    -      -       +      +
    239A  LEU*     4.0     3.1    -      -       +      +
    302A  TYR*     3.2     9.5    +      -       -      -
      1E  LEU      2.9    27.7    +      -       -      -
      3E  THR*     3.1    22.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 196 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157A  SER*     3.2    22.2    +      -       -      +
    160A  LEU*     3.8    18.2    -      -       +      -
    192A  THR*     2.8    18.3    +      -       -      +
    195A  LYS*     1.3    80.6    -      -       -      +
    197A  ALA*     1.3    66.7    +      -       -      +
    199A  THR*     3.3     4.0    +      -       -      -
    200A  ILE*     3.1    27.9    +      -       -      +
      1E  LEU      3.2     9.4    +      -       -      -
      2E  VAL*     3.1    18.4    -      -       +      +
      3E  THR*     2.7    48.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 197 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  LEU*     4.1    12.1    -      -       +      +
    165A  TYR*     4.6     9.0    -      -       +      -
    172A  ILE*     4.9     3.4    -      -       +      -
    193A  VAL      2.9    19.7    +      -       -      +
    194A  LEU      3.9     1.8    -      -       -      +
    196A  ASN*     1.3    75.1    -      -       -      +
    198A  LEU*     1.3    60.4    +      -       -      +
    200A  ILE*     3.2     6.6    +      -       -      +
    201A  SER*     2.8    34.9    +      -       -      -
    213A  TYR*     3.5    37.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 198 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194A  LEU      2.8    19.9    +      -       -      +
    195A  LYS      3.9     3.4    -      -       -      +
    197A  ALA*     1.3    77.2    -      -       -      +
    199A  THR*     1.3    57.4    +      -       -      +
    201A  SER*     4.2     3.6    -      -       -      -
    202A  ILE*     3.0    47.2    +      -       +      +
    210A  ALA*     3.5    28.5    -      -       +      +
    213A  TYR*     4.0    11.3    -      -       +      +
    214A  ILE*     3.7    20.9    -      -       +      -
    236A  ILE*     3.9    28.7    -      -       +      +
    239A  LEU*     3.7    29.6    -      -       +      -
    240A  LYS      4.7     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 199 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195A  LYS      2.7    20.1    +      -       -      -
    196A  ASN      3.4     8.1    -      -       -      -
    197A  ALA      3.1     0.4    -      -       -      -
    198A  LEU*     1.3    75.6    -      -       -      +
    200A  ILE*     1.3    60.9    +      -       -      +
    202A  ILE*     3.3     1.4    +      -       -      +
    203A  MSE      2.9    63.7    +      -       +      +
    239A  LEU*     3.4    16.1    -      -       +      +
    279A  GLU*     3.3     9.6    -      -       -      +
      1E  LEU*     2.9    41.2    +      -       -      +
      2E  VAL*     4.4     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 200 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  LEU*     3.5    45.5    -      -       +      +
    165A  TYR*     3.9    29.6    -      -       +      +
    196A  ASN      3.1    14.1    +      -       -      +
    197A  ALA*     3.8     6.3    -      -       -      +
    199A  THR*     1.3    77.9    -      -       -      +
    201A  SER*     1.3    59.3    +      -       -      +
    204A  ASN*     2.9    48.6    +      -       -      +
    206A  ASN*     5.5     0.2    -      -       -      +
    289A  PHE*     3.5    38.8    -      -       +      -
      2E  VAL*     3.8     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 201 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  TYR*     4.5     7.3    -      -       -      -
    197A  ALA      2.8    23.7    +      -       -      -
    198A  LEU*     3.6     5.4    -      -       -      -
    199A  THR      3.2     0.2    -      -       -      -
    200A  ILE*     1.3    78.8    -      -       -      +
    202A  ILE*     1.3    61.0    +      -       -      +
    204A  ASN      3.7     0.3    -      -       -      -
    205A  ARG      3.1     4.0    +      -       -      -
    206A  ASN*     2.7    40.1    +      -       -      +
    209A  GLU*     3.6    18.0    -      -       -      +
    210A  ALA*     3.6    26.9    -      -       -      -
    213A  TYR*     3.6    11.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 202 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198A  LEU*     3.0    33.3    +      -       +      +
    199A  THR*     3.9     3.1    -      -       -      +
    201A  SER*     1.3    76.3    -      -       -      +
    203A  MSE      1.3    60.7    +      -       -      +
    205A  ARG*     2.9    31.6    +      -       -      +
    206A  ASN      5.0     0.2    -      -       -      +
    207A  LEU*     5.2     4.9    -      -       +      -
    210A  ALA*     3.9    11.9    -      -       +      -
    239A  LEU*     2.9    50.9    -      -       +      +
    242A  ILE*     3.7    24.2    -      -       +      -
    243A  TYR*     4.0    13.7    -      -       +      +
    246A  LEU*     4.4     5.6    -      -       +      +
    283A  ILE*     3.8    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with MSE 203 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  THR*     2.9    44.4    +      -       +      +
    200A  ILE      3.8     3.6    -      -       -      +
    201A  SER      3.2     0.2    -      -       -      -
    202A  ILE*     1.3    74.2    -      -       -      +
    204A  ASN*     1.3    58.8    +      -       -      +
    205A  ARG*     3.0    20.2    +      -       -      +
    279A  GLU*     3.5    22.9    -      -       +      +
    282A  LYS*     4.7    20.4    -      -       +      -
    283A  ILE*     4.0    19.3    -      -       +      -
    286A  LYS*     4.9     2.6    -      -       -      +
    287A  GLU      3.3    25.3    -      -       -      +
    288A  LYS*     3.9     3.9    -      -       -      +
    289A  PHE*     3.2    54.5    -      -       +      +
    292A  PRO*     6.4     0.2    -      -       +      -
      2E  VAL*     5.0     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 204 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  TYR*     4.9     2.2    -      -       -      +
    166A  GLU*     4.8    11.1    +      -       -      -
    200A  ILE*     2.9    31.6    +      -       -      +
    203A  MSE      1.3    73.1    -      -       -      +
    205A  ARG*     1.3    70.8    +      -       -      +
    206A  ASN*     3.3    28.0    +      -       -      +
    288A  LYS*     3.5    23.3    -      -       +      +
    289A  PHE*     2.7    34.8    +      -       -      +
----------------------------------------------------------
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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