Contacts of the helix formed by residues 398 - 422 (chain B) in PDB entry 5FWP


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 398 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    368B  GLU*     3.3    33.3    +      -       -      +
    395B  LEU*     4.7    10.9    +      -       -      -
    396B  GLN      3.7     1.0    -      -       -      -
    397B  GLN*     1.3    68.4    -      -       -      +
    399B  LYS*     1.3    62.9    +      -       -      +
    400B  ILE      3.0     2.2    -      -       -      -
    401B  LEU*     2.8    26.1    +      -       -      +
    402B  LYS*     3.3     8.5    +      -       -      -
     17E  ASP*     5.2     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 399 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    397B  GLN*     3.0    13.4    +      -       -      +
    398B  SER*     1.3    80.9    +      -       -      +
    400B  ILE*     1.3    60.9    +      -       -      +
    402B  LYS*     3.1    15.7    +      -       +      +
    403B  VAL*     3.0    26.5    +      -       -      +
     10E  ILE*     3.1    47.0    +      -       +      +
     11E  GLU*     5.9     0.2    -      -       -      +
     12E  VAL*     3.7    11.7    +      -       +      +
     15E  ASP*     2.6    35.8    +      -       -      +
     18E  GLU*     2.8    23.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 400 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327B  LEU*     4.1    11.2    -      -       +      -
    386B  LEU*     4.0    17.3    -      -       +      -
    387B  PRO*     3.4    39.0    -      -       +      -
    395B  LEU*     4.9     8.5    -      -       +      -
    396B  GLN      4.0     0.9    -      -       -      +
    397B  GLN*     3.0    23.9    +      -       +      +
    399B  LYS*     1.3    78.6    -      -       -      +
    401B  LEU*     1.3    57.6    +      -       -      +
    403B  VAL*     3.2     9.3    +      -       +      +
    404B  ILE*     2.9    42.4    +      -       +      +
      7E  TRP*     4.1    16.8    -      -       +      +
     10E  ILE*     3.4    21.3    -      -       +      -
    119E  LEU*     5.7     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 401 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355B  LEU*     3.6    22.4    -      -       +      -
    363B  MET*     5.3     7.4    -      -       -      -
    365B  SER*     4.1    13.0    -      -       -      +
    368B  GLU*     3.6    35.2    -      -       +      +
    369B  LEU*     3.4    43.5    -      -       +      +
    395B  LEU*     5.3    10.7    -      -       +      +
    398B  SER*     2.8    15.7    +      -       -      +
    400B  ILE*     1.3    80.0    -      -       -      +
    402B  LYS*     1.3    57.5    +      -       -      +
    404B  ILE*     3.2    14.0    +      -       +      +
    405B  ARG*     2.8    28.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 402 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    368B  GLU*     2.8    30.7    +      -       +      +
    398B  SER*     3.3    13.8    +      -       -      +
    399B  LYS*     3.1    15.8    +      -       -      +
    401B  LEU*     1.3    75.1    -      -       -      +
    403B  VAL*     1.3    63.2    -      -       -      +
    405B  ARG*     3.3    24.1    +      -       -      +
    406B  LYS*     3.0    31.3    +      -       -      +
     12E  VAL*     3.9    21.5    -      -       +      -
     15E  ASP*     3.4    34.2    +      -       -      +
     16E  GLU*     3.4    26.5    -      -       -      +
     17E  ASP*     2.8    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 403 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327B  LEU*     3.8    16.6    -      -       +      -
    399B  LYS      3.0    19.2    +      -       -      +
    400B  ILE*     3.4     8.3    -      -       -      +
    402B  LYS*     1.3    74.1    -      -       -      +
    404B  ILE*     1.3    65.1    +      -       -      +
    406B  LYS*     3.3     7.1    +      -       +      +
    407B  ASN*     3.2    26.3    +      -       -      +
     10E  ILE*     3.9    13.9    -      -       +      -
     11E  GLU      5.1     0.2    -      -       -      +
     12E  VAL*     4.0     9.0    -      -       +      -
    115E  ASN*     4.9     2.0    -      -       -      -
    116E  VAL*     3.9    30.5    -      -       +      +
    119E  LEU*     3.8    35.7    -      -       +      -
    120E  SER*     5.5     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 404 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327B  LEU*     3.8    29.8    -      -       +      -
    329B  PHE*     4.0    21.0    -      -       +      -
    355B  LEU*     5.6     3.6    -      -       +      -
    369B  LEU*     3.7    11.4    -      -       +      -
    381B  VAL*     4.7    11.2    -      -       +      -
    383B  SER*     6.0     2.5    -      -       -      -
    386B  LEU*     5.1    11.0    -      -       +      -
    395B  LEU*     6.1     1.3    -      -       +      -
    400B  ILE*     2.9    34.0    +      -       +      +
    401B  LEU*     3.4    18.8    -      -       +      +
    403B  VAL*     1.3    71.0    -      -       -      +
    405B  ARG*     1.3    66.9    +      -       -      +
    407B  ASN*     3.2     7.3    +      -       -      +
    408B  ILE*     2.9    41.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 405 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    367B  ASP      5.2     1.0    +      -       -      -
    368B  GLU*     3.2    31.0    +      -       -      +
    369B  LEU      3.0    25.1    -      -       -      +
    370B  ILE      4.2     2.7    +      -       -      -
    371B  PRO*     3.9    27.6    -      -       +      -
    401B  LEU      2.8    12.4    +      -       -      +
    402B  LYS*     3.3    25.1    +      -       -      +
    404B  ILE*     1.3    76.6    -      -       -      +
    406B  LYS*     1.3    59.1    +      -       -      +
    408B  ILE*     3.0     5.8    +      -       -      +
    409B  VAL*     2.8    36.1    +      -       +      +
     14E  ASP*     3.7    30.9    +      -       -      -
     16E  GLU*     2.9    42.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 406 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    402B  LYS      3.0    16.5    +      -       -      +
    403B  VAL*     3.5     8.3    -      -       +      +
    404B  ILE      3.3     0.2    -      -       -      -
    405B  ARG*     1.3    84.3    -      -       -      +
    407B  ASN*     1.3    63.8    +      -       -      +
    409B  VAL*     3.4     8.5    +      -       -      +
    410B  LYS*     3.1    35.0    +      -       -      +
     12E  VAL*     4.3     8.5    -      -       +      -
     13E  SEP      2.8    42.2    +      -       -      -
     14E  ASP*     3.2    41.5    +      -       -      +
    116E  VAL*     3.7    27.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 407 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321B  PHE*     3.8    22.7    -      -       +      -
    323B  VAL*     4.3     8.6    -      -       +      +
    327B  LEU*     4.4     5.3    -      -       -      +
    329B  PHE*     5.1     1.1    -      -       +      -
    403B  VAL*     3.2    22.6    +      -       -      +
    404B  ILE*     3.2     9.2    +      -       -      +
    406B  LYS*     1.3    77.4    -      -       -      +
    408B  ILE*     1.3    61.4    +      -       -      +
    410B  LYS*     3.3    22.2    +      -       -      +
    411B  LYS*     3.2    24.8    +      -       -      +
    116E  VAL*     3.9    23.9    +      -       -      +
    120E  SER*     3.8    20.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 408 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321B  PHE*     4.5    15.9    -      -       +      -
    329B  PHE*     5.1     2.0    -      -       +      -
    333B  LEU*     4.0    21.1    -      -       +      -
    353B  ILE*     5.1     1.1    -      -       +      -
    369B  LEU*     3.6    37.5    -      -       +      +
    370B  ILE*     4.3    16.8    -      -       +      -
    374B  LEU*     5.9     0.4    -      -       +      -
    381B  VAL*     4.3    16.2    -      -       +      -
    404B  ILE*     2.9    27.8    +      -       +      +
    405B  ARG*     3.4     6.7    -      -       -      +
    407B  ASN*     1.3    73.9    -      -       -      +
    409B  VAL*     1.3    54.7    +      -       +      +
    411B  LYS*     3.0     5.8    +      -       -      +
    412B  CYS*     2.8    50.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 409 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370B  ILE*     6.1     0.2    -      -       +      -
    371B  PRO*     3.6    35.9    -      -       +      -
    373B  TYR*     4.4     9.2    -      -       -      +
    374B  LEU*     4.0     9.4    -      -       +      -
    405B  ARG*     2.8    21.9    +      -       +      +
    406B  LYS*     3.5    10.3    -      -       -      +
    408B  ILE*     1.3    76.5    -      -       +      +
    410B  LYS*     1.3    65.9    +      -       +      +
    412B  CYS*     3.1     6.8    +      -       -      +
    413B  LEU*     2.9    42.2    +      -       +      +
    447B  ASN*     3.9    20.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 410 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406B  LYS*     3.1    21.7    +      -       -      +
    407B  ASN*     3.4    27.6    +      -       -      +
    409B  VAL*     1.3    81.3    -      -       +      +
    411B  LYS*     1.3    61.3    +      -       +      +
    413B  LEU*     3.5    10.2    +      -       +      +
    414B  GLU*     3.1    34.5    +      -       -      +
    447B  ASN*     6.1     0.7    -      -       -      +
    450B  ARG*     5.1     0.9    +      -       -      -
    116E  VAL*     4.1    21.6    +      -       -      +
    117E  ASP*     5.1     4.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 411 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319B  LYS*     3.0    26.0    +      -       -      +
    321B  PHE*     3.6    37.7    -      -       +      -
    333B  LEU*     4.3    14.6    -      -       +      -
    407B  ASN      3.2    12.3    +      -       -      +
    408B  ILE      3.0     8.1    +      -       -      +
    410B  LYS*     1.3    76.8    -      -       +      +
    412B  CYS*     1.3    60.9    +      -       -      +
    414B  GLU*     3.1    28.8    +      -       -      +
    415B  LEU*     3.0    26.2    +      -       -      +
    122E  ASP*     2.8    29.8    +      -       -      -
    125E  SER*     3.1    18.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 412 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333B  LEU*     3.9    13.7    -      -       -      -
    353B  ILE*     6.2     0.2    -      -       -      -
    370B  ILE*     6.0     0.9    -      -       -      -
    374B  LEU*     4.3    11.7    -      -       +      -
    377B  ILE*     3.5    34.1    -      -       +      -
    408B  ILE*     2.8    40.1    +      -       -      -
    409B  VAL*     3.1     8.9    +      -       -      +
    411B  LYS*     1.3    76.7    -      -       -      +
    413B  LEU*     1.3    58.3    +      -       +      +
    415B  LEU*     3.2     9.3    +      -       -      +
    416B  PHE*     2.9    45.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 413 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373B  TYR*     5.5     2.5    -      -       +      +
    374B  LEU*     6.0     1.6    -      -       +      -
    409B  VAL*     2.9    33.9    +      -       +      +
    410B  LYS*     3.6    10.1    -      -       +      +
    412B  CYS*     1.3    77.4    -      -       +      +
    414B  GLU*     1.3    56.8    +      -       -      +
    416B  PHE*     3.3    16.9    +      -       +      +
    417B  SER*     2.9    31.4    +      -       -      -
    447B  ASN*     3.6    28.5    -      -       +      +
    450B  ARG*     3.3    40.6    +      -       +      +
    451B  LEU*     3.7    31.6    -      -       +      -
    454B  LEU*     5.0     2.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 414 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319B  LYS*     2.9    25.2    +      -       -      +
    410B  LYS*     3.1    23.0    +      -       -      +
    411B  LYS*     3.1    30.4    +      -       -      +
    412B  CYS      3.3     0.2    -      -       -      -
    413B  LEU*     1.3    77.2    -      -       -      +
    415B  LEU*     1.3    61.7    +      -       -      +
    417B  SER*     3.2     3.2    +      -       -      -
    418B  GLU*     3.0    33.0    +      -       -      +
    450B  ARG*     3.5    17.7    -      -       -      +
    125E  SER*     4.3     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 415 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317B  ALA*     4.2    19.7    -      -       +      -
    318B  VAL      4.4     1.3    -      -       -      +
    319B  LYS*     3.8    31.1    -      -       +      +
    333B  LEU*     4.7    10.1    -      -       +      +
    335B  ILE*     3.5    34.8    -      -       +      -
    377B  ILE*     6.5     0.7    -      -       +      -
    411B  LYS      3.0    14.5    +      -       -      +
    412B  CYS*     3.2    12.1    +      -       -      +
    414B  GLU*     1.3    75.8    -      -       -      +
    416B  PHE*     1.3    52.1    +      -       +      +
    418B  GLU*     3.3     6.1    +      -       -      +
    419B  LEU*     2.8    35.0    +      -       -      +
    127E  SER*     3.9    24.7    -      -       -      -
    128E  MET      4.4     5.6    -      -       -      +
    129E  VAL*     4.8     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 416 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335B  ILE*     3.7    26.5    -      -       +      -
    374B  LEU*     3.7    27.1    -      -       +      -
    376B  PHE*     3.8    20.6    -      +       -      -
    377B  ILE*     4.0    10.5    -      -       +      -
    412B  CYS*     2.9    29.5    +      -       +      -
    413B  LEU*     3.4    18.6    -      -       +      +
    415B  LEU*     1.3    77.5    -      -       +      +
    417B  SER*     1.3    52.3    +      -       -      +
    419B  LEU*     3.3     7.5    +      -       +      +
    420B  ALA*     2.8    33.4    +      -       -      +
    426B  TYR*     4.2     2.9    -      -       +      -
    429B  PHE*     3.6    31.0    -      +       +      -
    437B  LEU*     6.4     0.2    -      -       +      -
    451B  LEU*     5.3     3.1    -      -       +      -
    454B  LEU*     3.7    32.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 417 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    413B  LEU      2.9     6.6    +      -       -      -
    414B  GLU*     3.2     9.4    +      -       -      -
    416B  PHE*     1.3    76.4    -      -       -      +
    418B  GLU*     1.3    59.2    +      -       -      +
    420B  ALA*     3.1    11.0    +      -       -      +
    421B  GLU*     3.1    28.8    +      -       -      +
    450B  ARG*     2.8    35.6    +      -       -      -
    453B  GLU*     5.1     1.9    +      -       -      -
    454B  LEU*     4.5     8.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 418 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319B  LYS*     5.4     2.3    +      -       -      -
    414B  GLU*     3.0    24.1    +      -       -      +
    415B  LEU*     3.8     6.3    -      -       +      +
    417B  SER*     1.3    73.5    -      -       -      +
    419B  LEU*     1.3    65.8    +      -       -      +
    421B  GLU*     3.1    37.9    +      -       -      +
    422B  ASP*     3.3     6.6    +      -       -      +
    127E  SER*     2.6    37.5    +      -       -      -
    129E  VAL*     4.7     8.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 419 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316B  LEU*     4.2    10.1    -      -       +      -
    317B  ALA*     4.9     2.0    -      -       +      -
    335B  ILE*     4.0    19.5    -      -       +      -
    415B  LEU*     2.8    18.1    +      -       +      +
    416B  PHE*     3.4     7.6    -      -       +      +
    418B  GLU*     1.3    77.9    -      -       -      +
    420B  ALA*     1.3    55.3    +      -       -      +
    422B  ASP*     2.9    32.3    +      -       -      +
    425B  ASN*     4.1    18.4    -      -       +      +
    426B  TYR*     3.3    13.7    -      -       +      +
    429B  PHE*     3.5    43.1    -      -       +      -
    129E  VAL*     3.7    38.5    -      -       +      +
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Residues in contact with ALA 420 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    416B  PHE      2.8    14.2    +      -       -      +
    417B  SER*     3.1    11.9    +      -       -      +
    419B  LEU*     1.3    73.1    -      -       -      +
    421B  GLU*     1.3    65.8    +      -       -      +
    422B  ASP      3.3     0.5    +      -       -      -
    423B  LYS*     3.4    14.7    +      -       -      +
    426B  TYR*     3.6    21.4    -      -       +      +
    454B  LEU*     4.1    11.2    -      -       +      -
    456B  ARG*     4.1    21.4    +      -       -      +
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Residues in contact with GLU 421 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417B  SER      3.1    15.9    +      -       -      +
    418B  GLU*     3.1    30.3    +      -       -      +
    420B  ALA*     1.3    74.5    -      -       -      +
    422B  ASP*     1.3    60.0    +      -       -      +
    423B  LYS*     2.9    10.6    +      -       -      +
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Residues in contact with ASP 422 (chain B). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    418B  GLU      3.3     6.3    +      -       -      +
    419B  LEU*     2.9    16.2    +      -       -      +
    420B  ALA      3.7     0.2    -      -       -      -
    421B  GLU*     1.3    74.3    -      -       -      +
    423B  LYS*     1.3    50.9    +      -       -      +
    424B  GLU*     3.4     8.0    +      -       -      +
    425B  ASN*     2.9    25.6    +      -       +      +
    426B  TYR      2.8    27.9    +      -       -      -
    129E  VAL*     3.7    10.1    -      -       +      +
    131E  THR*     2.5    33.9    +      -       -      +
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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
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  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) +   -    +    +   +   +    +    -
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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