Contacts of the helix formed by residues 180 - 207 (chain F) in PDB entry 6VVT


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 ASN 180 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179F  LEU*     1.3    74.4    -      -       -      +
    181F  ALA*     1.3    65.3    +      -       -      +
    182F  GLU*     2.9    26.9    +      -       +      +
    183F  GLU*     2.5    57.9    +      -       -      +
    184F  GLU*     3.3    23.6    +      -       -      +
    280F  LYS*     4.3     5.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 181 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180F  ASN*     1.3    76.3    -      -       -      +
    182F  GLU*     1.3    76.9    +      -       -      +
    184F  GLU*     3.5    18.6    +      -       -      +
    185F  VAL*     3.5    20.3    +      -       -      +
    280F  LYS*     3.7    26.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 182 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180F  ASN*     2.9    19.4    -      -       -      +
    181F  ALA*     1.3    89.1    +      -       -      +
    183F  GLU*     1.3    63.4    +      -       +      +
    185F  VAL*     3.4    13.7    +      -       -      +
    186F  GLU*     3.4    10.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 183 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178F  LEU      4.3     4.0    -      -       -      +
    179F  LEU*     3.5    31.2    -      -       +      +
    180F  ASN*     2.5    56.0    +      -       -      +
    182F  GLU*     1.3    71.7    -      -       +      +
    184F  GLU*     1.3    65.4    +      -       -      +
    186F  GLU*     3.1     8.3    +      -       -      +
    187F  LEU*     3.0    31.6    +      -       +      +
    232F  HIS*     5.1     4.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 184 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179F  LEU*     4.2    21.3    -      -       +      +
    180F  ASN      3.3    15.4    +      -       -      +
    181F  ALA*     3.8    16.5    -      -       -      +
    182F  GLU      3.3     0.4    -      -       -      -
    183F  GLU*     1.3    77.4    -      -       -      +
    185F  VAL*     1.3    59.4    +      -       +      +
    187F  LEU*     3.4     7.0    +      -       -      +
    188F  ALA*     2.8    29.6    +      -       -      +
    233F  LEU*     4.8    13.3    -      -       +      +
    237F  ASN*     4.7     1.8    -      -       -      +
    273F  PHE*     4.9     9.9    -      -       +      -
    279F  TYR      4.9     1.4    -      -       -      +
    280F  LYS*     3.9    13.4    -      -       -      +
    281F  PHE*     3.2    48.1    +      -       +      +
     31O    T      3.9    14.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 185 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181F  ALA      3.5    15.5    -      -       -      +
    182F  GLU*     3.4     7.4    +      -       -      +
    183F  GLU      3.2     0.8    -      -       -      -
    184F  GLU*     1.3    78.1    -      -       +      +
    186F  GLU*     1.3    58.8    +      -       -      +
    188F  ALA*     3.2     5.9    +      -       -      +
    189F  LYS*     2.7    47.8    +      -       -      +
    273F  PHE*     5.7     2.7    -      -       +      -
    275F  TYR*     3.3    45.5    -      -       +      +
    278F  GLY*     6.3     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 186 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182F  GLU      3.4     9.1    +      -       -      +
    183F  GLU*     3.1    11.7    +      -       -      +
    185F  VAL*     1.3    77.4    -      -       -      +
    187F  LEU*     1.3    61.0    +      -       +      +
    189F  LYS*     3.2    15.1    +      -       -      +
    190F  ARG*     2.9    39.5    +      -       +      +
    101J  ARG*     2.5    42.5    +      -       -      +
    104J  LEU*     4.8     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 187 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179F  LEU*     3.4    33.0    -      -       +      -
    183F  GLU*     3.0    15.7    +      -       +      +
    184F  GLU      3.9     4.5    -      -       -      +
    186F  GLU*     1.3    78.2    -      -       +      +
    188F  ALA*     1.3    62.7    +      -       -      +
    190F  ARG*     3.2    31.9    +      -       -      +
    191F  ILE*     2.9    31.2    +      -       -      +
    229F  ALA*     3.7    14.3    -      -       +      +
    232F  HIS*     3.7    28.7    -      -       +      +
    233F  LEU*     4.2    21.3    -      -       +      +
    502F  SO4      4.3     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 188 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184F  GLU      2.8    22.1    +      -       -      +
    185F  VAL      3.2     5.1    +      -       -      +
    187F  LEU*     1.3    73.2    -      -       -      +
    189F  LYS*     1.3    62.9    +      -       -      +
    191F  ILE*     3.3    10.9    +      -       -      +
    192F  GLU*     3.1    27.0    +      -       +      +
    233F  LEU*     5.1     5.3    -      -       +      +
    273F  PHE*     4.2    17.9    -      -       +      +
    275F  TYR*     3.7    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 189 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185F  VAL*     2.7    33.5    +      -       -      +
    186F  GLU*     3.5    15.8    +      -       -      +
    188F  ALA*     1.3    72.7    -      -       -      +
    190F  ARG*     1.3    57.6    +      -       -      +
    191F  ILE      3.2     0.2    +      -       -      -
    192F  GLU*     3.2     3.3    +      -       -      +
    193F  ALA*     2.8    31.1    +      -       -      +
    275F  TYR*     3.8    35.4    -      -       +      +
     97J  LEU*     3.9    23.4    -      -       +      +
    100J  GLU*     4.6    12.0    +      -       -      +
    101J  ARG*     3.7    26.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 190 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186F  GLU*     2.9    27.2    +      -       +      +
    187F  LEU*     3.4    27.8    -      -       -      +
    189F  LYS*     1.3    75.1    -      -       -      +
    191F  ILE*     1.3    56.8    +      -       -      +
    193F  ALA*     3.5     7.2    +      -       -      +
    194F  GLY      2.9    21.3    +      -       -      -
    222F  ILE*     4.6     2.2    -      -       -      +
    225F  ASP*     2.6    51.2    +      -       -      +
    226F  GLY*     3.5    11.9    +      -       -      -
    229F  ALA*     3.5    23.8    -      -       +      +
    502F  SO4      2.7    43.0    +      -       -      -
    101J  ARG*     3.7    26.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 191 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187F  LEU      2.9    18.5    +      -       -      +
    188F  ALA*     3.6     6.3    -      -       -      +
    189F  LYS      3.1     0.2    -      -       -      -
    190F  ARG*     1.3    74.0    -      -       -      +
    192F  GLU*     1.3    64.9    +      -       +      +
    194F  GLY*     2.9    16.1    +      -       -      -
    195F  LEU*     3.0    15.0    +      -       +      +
    226F  GLY*     3.9     7.9    -      -       -      +
    229F  ALA*     3.5    18.2    -      -       +      +
    230F  LYS*     3.5    34.3    -      -       +      +
    233F  LEU*     4.1    11.9    -      -       +      -
    270F  VAL*     3.9    22.7    -      -       +      +
     81J  HIS*     3.8    29.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 192 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188F  ALA*     3.1    16.1    +      -       -      +
    189F  LYS      3.8     2.9    -      -       -      +
    191F  ILE*     1.3    77.2    -      -       +      +
    193F  ALA*     1.3    61.9    +      -       -      +
    195F  LEU*     3.3     3.4    +      -       +      +
    196F  TYR*     3.1    24.8    +      -       -      +
    273F  PHE      4.2     3.3    -      -       -      +
    275F  TYR*     3.3    24.8    +      -       -      -
     85J  LEU*     3.4    34.3    -      -       +      +
     88J  ARG*     3.1    29.8    +      -       -      +
     89J  ARG*     3.2    34.7    +      -       -      +
     94J  LEU*     4.3     5.0    -      -       +      +
     97J  LEU*     4.1    11.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 193 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189F  LYS      2.8    17.6    +      -       -      +
    190F  ARG*     3.8     6.3    -      -       -      +
    192F  GLU*     1.3    76.7    -      -       -      +
    194F  GLY*     1.3    57.8    +      -       -      +
    196F  TYR*     4.3     3.7    -      -       -      +
    197F  ALA*     2.9    31.7    +      -       -      +
    222F  ILE*     3.6    13.1    -      -       +      +
     94J  LEU      6.2     0.2    -      -       -      -
     97J  LEU*     4.3    10.6    -      -       +      +
     98J  LEU*     4.4    11.9    -      -       +      +
    101J  ARG*     3.8    28.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 194 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190F  ARG      2.9    16.2    +      -       -      -
    191F  ILE      2.9     4.9    +      -       -      -
    193F  ALA*     1.3    75.4    -      -       -      +
    195F  LEU*     1.3    59.9    +      -       -      +
    197F  ALA*     4.0     1.3    -      -       -      +
    198F  THR*     2.7    34.4    +      -       -      -
    222F  ILE*     3.9    20.4    -      -       -      -
    223F  CYS*     4.1     5.2    -      -       -      -
    226F  GLY*     4.4     5.2    -      -       -      -
    227F  ASP*     5.8     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 195 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191F  ILE*     3.0    16.1    +      -       +      +
    192F  GLU*     3.3     1.5    +      -       +      -
    194F  GLY*     1.3    75.2    -      -       -      +
    196F  TYR*     1.3    59.5    +      -       -      +
    198F  THR*     3.3     6.9    +      -       -      -
    199F  GLN*     2.9    29.3    +      -       -      +
     81J  HIS*     3.2    67.5    -      -       +      +
     82J  TRP*     4.1    17.0    -      -       +      +
     85J  LEU*     3.8    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 196 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192F  GLU      3.1    17.2    +      -       -      +
    193F  ALA*     4.3     3.1    -      -       -      +
    195F  LEU*     1.3    73.8    -      -       -      +
    197F  ALA*     1.3    56.7    +      -       -      +
    199F  GLN*     3.1     1.5    +      -       +      -
    200F  LYS*     2.7    50.1    +      -       +      +
    203F  GLU*     5.3     7.0    -      -       -      -
     82J  TRP*     3.7    31.1    -      +       +      -
     91J  VAL*     4.1    17.7    +      -       +      +
     94J  LEU*     3.6    35.2    -      -       +      +
     95J  GLU*     3.5    48.6    +      -       -      +
     98J  LEU*     3.8    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 197 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193F  ALA      2.9    21.9    +      -       -      +
    194F  GLY      4.0     2.9    -      -       -      +
    196F  TYR*     1.3    78.8    -      -       -      +
    198F  THR*     1.3    61.0    +      -       -      +
    200F  LYS*     3.4     6.3    +      -       -      +
    201F  LEU*     3.1    31.1    +      -       -      +
    219F  MET*     3.9    28.9    -      -       +      +
    222F  ILE*     4.0    11.4    -      -       +      -
    223F  CYS*     4.4     2.9    -      -       -      -
     98J  LEU*     4.4    15.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 198 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194F  GLY      2.7    23.5    +      -       -      -
    195F  LEU*     3.7     7.6    -      -       -      -
    197F  ALA*     1.3    76.8    -      -       -      +
    199F  GLN*     1.3    63.0    +      -       -      +
    201F  LEU*     3.5     7.0    +      -       +      +
    202F  ALA*     3.3    20.3    +      -       +      +
    223F  CYS*     2.9    25.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 199 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195F  LEU      2.9    17.4    +      -       -      +
    196F  TYR*     3.7     3.8    -      -       +      +
    198F  THR*     1.3    74.5    -      -       -      +
    200F  LYS*     1.3    60.1    +      -       -      +
    202F  ALA*     3.2    10.3    +      -       -      +
    203F  GLU*     2.9    67.1    +      -       -      +
    206F  GLU*     5.2     4.6    +      -       -      -
     82J  TRP*     3.4    54.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 200 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196F  TYR*     2.7    38.0    +      -       +      +
    197F  ALA*     3.7     6.7    -      -       -      +
    199F  GLN*     1.3    73.0    -      -       -      +
    201F  LEU*     1.3    58.8    +      -       +      +
    203F  GLU*     3.2    10.0    +      -       -      +
    204F  LEU*     2.9    43.1    +      -       +      +
    219F  MET*     4.7    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 201 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    197F  ALA      3.1    18.0    +      -       -      +
    198F  THR*     3.9     8.5    -      -       +      +
    200F  LYS*     1.3    77.4    -      -       -      +
    202F  ALA*     1.3    61.3    +      -       -      +
    204F  LEU*     3.6    12.3    +      -       +      +
    205F  ALA*     3.6    18.2    +      -       -      +
    216F  ARG*     4.3    19.5    -      -       +      -
    219F  MET*     3.8    32.5    -      -       +      +
    220F  GLN*     3.8    40.4    -      -       +      +
    223F  CYS*     5.0     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 202 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198F  THR*     3.3    11.1    +      -       +      +
    199F  GLN*     3.2    16.5    +      -       -      +
    200F  LYS      3.2     0.4    -      -       -      -
    201F  LEU*     1.3    77.6    -      -       -      +
    203F  GLU*     1.3    61.2    +      -       -      +
    205F  ALA*     3.5     6.6    +      -       -      +
    206F  GLU*     3.0    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 203 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196F  TYR*     5.3     7.2    -      -       -      -
    199F  GLN*     2.9    52.4    +      -       -      +
    200F  LYS*     3.8     8.0    -      -       -      +
    202F  ALA*     1.3    75.0    -      -       -      +
    204F  LEU*     1.3    61.6    +      -       +      +
    206F  GLU*     3.1    19.6    +      -       -      +
    207F  LYS*     2.9    59.4    +      -       -      +
     82J  TRP*     4.4     7.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 204 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200F  LYS*     2.9    29.5    +      -       +      +
    201F  LEU*     4.0    11.0    -      -       +      +
    202F  ALA      3.3     0.2    -      -       -      -
    203F  GLU*     1.3    77.7    -      -       +      +
    205F  ALA*     1.3    60.0    +      -       -      +
    207F  LYS*     3.5     3.9    +      -       +      +
    208F  GLY      3.1     3.8    +      -       -      -
    209F  GLU*     2.8    75.4    +      -       +      +
    210F  LYS      5.0     1.1    -      -       -      +
    211F  LEU*     3.2    46.0    -      -       +      -
    216F  ARG*     6.2     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 205 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201F  LEU      3.6     9.1    +      -       -      +
    202F  ALA*     3.5     9.5    +      -       -      +
    203F  GLU      3.2     0.6    -      -       -      -
    204F  LEU*     1.3    76.4    -      -       -      +
    206F  GLU*     1.3    68.2    +      -       +      +
    208F  GLY*     3.4     9.7    +      -       -      -
    209F  GLU      4.9     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 206 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199F  GLN*     5.2     4.0    +      -       -      -
    202F  ALA*     3.0    26.9    -      -       -      +
    203F  GLU*     3.1    22.2    +      -       -      +
    205F  ALA*     1.3    78.9    -      -       +      +
    207F  LYS*     1.3    63.7    +      -       +      +
    208F  GLY      3.2     3.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 207 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203F  GLU*     2.9    46.4    +      -       +      +
    204F  LEU*     4.3     2.0    -      -       +      +
    205F  ALA      3.3     0.2    -      -       -      -
    206F  GLU*     1.3    81.3    -      -       +      +
    208F  GLY*     1.3    65.5    +      -       -      +
    209F  GLU*     3.3    33.3    +      -       +      +
----------------------------------------------------------
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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