Contacts of the helix formed by residues 403 - 429 (chain B) in PDB entry 5FN3


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 ASP 403 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  ASN*     5.2     9.0    +      -       -      +
    101B  LYS*     3.1    26.7    +      -       -      +
    396B  ALA      4.1     4.9    -      -       -      +
    397B  SER*     3.0    26.8    -      -       -      +
    398B  ALA      4.6     3.1    -      -       -      +
    400B  ALA*     3.6    29.0    -      -       -      +
    401B  SER      3.1     6.2    -      -       -      +
    402B  GLY*     1.3    74.7    -      -       -      +
    404B  TRP*     1.3    75.7    +      -       +      +
    406B  THR*     3.2     7.7    +      -       -      -
    407B  THR*     3.2    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 404 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  ASN*     5.4     2.2    -      -       -      -
     97B  VAL*     4.3    15.3    -      -       +      -
     98B  ALA*     6.0     2.0    -      -       -      -
    101B  LYS*     4.6    33.3    -      -       +      +
    402B  GLY      2.6     5.9    +      -       -      -
    403B  ASP*     1.3    84.6    +      -       -      +
    405B  ASN*     1.3    66.2    +      -       -      +
    407B  THR*     3.0    24.8    -      -       +      +
    408B  ILE*     2.9    32.5    +      -       +      +
    135C  ILE*     3.6    45.8    +      -       +      +
    136C  ASN*     3.6     8.1    -      -       -      +
    139C  ALA*     3.5    32.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 405 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    402B  GLY*     3.0    12.8    +      -       -      +
    404B  TRP*     1.3    79.8    -      -       -      +
    406B  THR*     1.3    59.6    +      -       -      +
    408B  ILE*     3.1    12.5    -      -       -      +
    409B  ALA      2.9    24.9    +      -       -      -
    449B  THR*     5.2     2.5    -      -       +      -
    453B  VAL*     6.1     0.4    -      -       +      +
    454B  GLN*     5.3     3.7    +      -       +      +
    457B  MET*     3.7    28.7    -      -       -      +
    458B  ASP*     4.3     7.3    +      -       -      -
    132C  PHE*     3.3    38.6    +      -       +      +
    135C  ILE*     3.5    12.7    -      -       -      +
    136C  ASN*     2.8    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 406 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    396B  ALA*     5.1     0.7    -      -       -      -
    400B  ALA*     4.3     4.9    -      -       -      -
    402B  GLY*     3.2    26.2    +      -       -      -
    403B  ASP      3.2     7.7    +      -       -      -
    404B  TRP      3.2     0.4    -      -       -      -
    405B  ASN*     1.3    76.4    -      -       -      +
    407B  THR*     1.4    58.4    +      -       -      +
    409B  ALA*     3.2     3.5    +      -       -      +
    410B  CYS*     2.8    34.8    +      -       -      -
    446B  TYR*     3.4    48.2    -      -       +      +
    449B  THR*     3.7    24.1    -      -       +      +
    450B  ASP*     3.7    12.1    +      -       -      +
    454B  GLN*     4.8     0.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 407 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97B  VAL*     4.5    11.3    -      -       +      +
    393B  VAL*     2.8    39.3    +      -       +      +
    396B  ALA*     3.9     8.7    -      -       -      +
    397B  SER*     3.4    16.5    +      -       -      -
    403B  ASP      3.2    16.2    +      -       -      +
    404B  TRP*     3.0    40.4    +      -       +      +
    406B  THR*     1.4    79.0    -      -       -      +
    408B  ILE*     1.3    59.0    +      -       +      +
    410B  CYS*     3.2     4.7    +      -       -      +
    411B  PHE*     2.9    28.2    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    404B  TRP*     2.9    20.3    +      -       +      +
    405B  ASN*     3.1    18.2    -      -       -      +
    407B  THR*     1.3    80.3    -      -       +      +
    409B  ALA*     1.3    57.6    +      -       -      +
    411B  PHE*     3.2    20.4    +      -       +      +
    412B  VAL*     2.9    37.7    +      -       +      +
    128C  ILE*     4.4     6.1    -      -       +      -
    131C  VAL*     3.8    33.0    -      -       +      -
    132C  PHE*     3.6    21.5    -      -       +      -
    135C  ILE*     5.7     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 409 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    405B  ASN      2.9    12.9    +      -       -      +
    406B  THR      3.2     9.4    +      -       -      +
    408B  ILE*     1.3    78.6    -      -       -      +
    410B  CYS*     1.3    56.3    -      -       -      +
    412B  VAL*     3.2     3.8    +      -       -      +
    413B  ALA*     2.9    28.6    +      -       -      +
    445B  PHE*     4.1     8.3    -      -       +      +
    449B  THR*     3.9    22.0    -      -       +      +
     43C  LEU*     3.7    35.6    -      -       +      +
    132C  PHE*     3.9     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 410 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392B  LEU*     3.6    21.5    -      -       +      -
    393B  VAL*     4.8     1.6    -      -       +      -
    396B  ALA*     4.2     5.6    -      -       +      -
    406B  THR      2.8    29.2    +      -       -      -
    407B  THR*     3.2     8.9    +      -       -      +
    409B  ALA*     1.3    75.7    -      -       -      +
    411B  PHE*     1.3    56.3    +      -       -      +
    413B  ALA*     3.2     6.4    +      -       -      +
    414B  ILE*     2.9    34.6    +      -       -      +
    442B  GLY*     3.9     8.3    -      -       -      +
    445B  PHE*     4.3     0.9    -      -       -      -
    446B  TYR*     3.3    50.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 411 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  THR*     3.7    33.4    -      -       +      -
     93B  MET*     3.6    45.1    -      -       +      -
     94B  VAL*     4.7    10.1    -      -       +      -
     97B  VAL*     5.8     2.2    -      -       +      -
    393B  VAL*     4.1     9.3    -      -       +      +
    407B  THR      2.9    12.5    +      -       -      +
    408B  ILE*     3.2    22.7    -      -       +      +
    410B  CYS*     1.3    77.4    -      -       -      +
    412B  VAL*     1.3    67.3    -      -       +      +
    414B  ILE*     3.2     3.7    +      -       -      +
    415B  LEU*     2.9    56.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 412 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    408B  ILE*     2.9    22.5    +      -       +      +
    409B  ALA      3.5     2.2    -      -       -      +
    411B  PHE*     1.3    87.0    -      -       +      +
    413B  ALA*     1.3    58.4    +      -       -      +
    415B  LEU*     3.2     8.8    +      -       +      +
    416B  ILE*     2.9    28.0    +      -       +      +
     36C  VAL*     4.5     6.7    -      -       +      +
     39C  ALA*     4.4     9.6    -      -       +      -
     40C  PHE*     4.0    24.5    -      -       +      +
     43C  LEU*     3.2    33.2    -      -       +      -
    128C  ILE*     4.5    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 413 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409B  ALA      2.9    10.5    +      -       -      +
    410B  CYS      3.3    10.1    -      -       -      +
    412B  VAL*     1.3    77.0    -      -       -      +
    414B  ILE*     1.3    57.4    +      -       -      +
    416B  ILE*     3.2    12.3    +      -       -      +
    417B  GLY*     2.8    26.3    +      -       -      -
    441B  PHE*     3.8     6.2    -      -       +      +
    442B  GLY*     3.6    19.3    -      -       -      +
    445B  PHE*     3.2    38.8    -      -       +      -
     40C  PHE*     4.9     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 414 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  VAL*     5.0     3.8    -      -       +      -
     93B  MET*     3.6    22.7    -      -       +      -
    389B  TYR*     3.1    66.0    -      -       +      +
    392B  LEU*     3.3    36.8    -      -       +      -
    393B  VAL*     4.5     0.4    -      -       +      -
    410B  CYS      2.9    13.2    +      -       -      +
    411B  PHE*     3.2     7.4    +      -       -      +
    413B  ALA*     1.3    77.3    -      -       -      +
    415B  LEU*     1.3    59.5    -      -       +      +
    417B  GLY*     3.2     2.1    +      -       -      -
    418B  LEU*     2.9    29.9    +      -       +      +
    438B  SER*     3.9    16.2    -      -       -      +
    442B  GLY*     4.4     2.0    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
     86B  PHE*     3.5    31.7    -      -       +      +
     89B  VAL*     5.3     5.6    -      -       +      -
     90B  THR*     4.5    19.5    -      -       +      +
     93B  MET*     4.3    13.5    -      -       +      -
    411B  PHE*     2.9    51.5    +      -       +      +
    412B  VAL*     3.2    10.7    +      -       -      +
    414B  ILE*     1.3    79.6    -      -       +      +
    416B  ILE*     1.3    57.9    +      -       -      +
    418B  LEU*     3.2     8.0    +      -       +      +
    419B  CYS*     2.9    25.7    +      -       -      +
     36C  VAL*     4.1    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 416 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    412B  VAL      2.9    11.2    +      -       -      +
    413B  ALA      3.2    10.1    +      -       -      +
    415B  LEU*     1.3    75.5    -      -       -      +
    417B  GLY*     1.3    63.0    +      -       -      +
    419B  CYS*     3.2    17.8    +      -       +      +
    420B  LEU*     2.9    35.2    +      -       +      +
    441B  PHE*     4.4    11.4    -      -       +      -
     36C  VAL*     3.3    36.3    -      -       +      +
     37C  ALA*     3.8     8.5    -      -       +      -
     40C  PHE*     3.4    63.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 417 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    413B  ALA      2.8    13.4    +      -       -      -
    414B  ILE      3.2     3.6    +      -       -      -
    416B  ILE*     1.3    78.2    -      -       -      +
    418B  LEU*     1.3    53.0    +      -       -      +
    420B  LEU*     3.2    10.3    +      -       -      +
    421B  THR*     2.6    37.6    +      -       -      -
    437B  ILE*     4.3     4.8    -      -       -      +
    438B  SER*     3.6    24.0    -      -       -      -
    441B  PHE*     5.1     5.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 418 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  VAL*     4.9     2.5    -      -       +      +
     85B  LEU*     3.4    50.3    -      -       +      +
     86B  PHE*     4.1    20.4    -      -       +      -
     89B  VAL*     4.0    19.1    -      -       +      -
    381B  LEU*     5.1     2.5    -      -       +      -
    389B  TYR*     3.7    30.3    -      -       +      +
    414B  ILE*     2.9    13.6    +      -       +      +
    415B  LEU*     3.4    11.9    -      -       +      +
    417B  GLY*     1.3    75.7    -      -       -      +
    419B  CYS*     1.3    57.3    +      -       -      +
    421B  THR*     3.2    11.4    -      -       -      -
    422B  LEU*     2.9    29.5    +      -       +      +
    435B  LEU*     6.0     1.3    -      -       +      -
    438B  SER*     3.7     4.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 419 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  VAL*     4.7    11.2    -      -       +      +
     86B  PHE*     4.3    14.1    -      -       +      -
    415B  LEU      2.9    12.6    +      -       -      +
    416B  ILE*     3.3    24.7    -      -       +      +
    418B  LEU*     1.3    76.9    -      -       -      +
    420B  LEU*     1.3    72.2    +      -       -      +
    422B  LEU*     3.2     8.8    +      -       -      +
    423B  LEU*     2.9    38.6    +      -       -      +
     33C  ILE*     5.3    14.4    -      -       +      -
     36C  VAL*     5.9     0.2    -      -       +      -
     37C  ALA*     6.3     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 420 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416B  ILE*     2.9    19.8    +      -       +      +
    417B  GLY*     3.2    12.5    +      -       -      +
    419B  CYS*     1.3    86.0    -      -       -      +
    421B  THR*     1.3    53.3    +      -       -      +
    423B  LEU*     3.2     9.0    +      -       +      +
    424B  LEU*     2.8    36.4    +      -       -      +
    437B  ILE*     4.6    23.1    -      -       +      -
    441B  PHE*     5.1    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 421 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    389B  TYR*     5.7     0.2    -      -       -      -
    417B  GLY      2.6    20.1    +      -       -      -
    418B  LEU*     3.2    12.2    -      -       +      -
    420B  LEU*     1.3    72.3    -      -       -      +
    422B  LEU*     1.3    58.5    +      -       -      +
    424B  LEU*     3.2     5.1    +      -       -      +
    425B  LEU*     2.7    40.6    +      -       +      +
    432B  LEU*     5.4     3.6    -      -       +      -
    433B  PRO*     4.8     7.0    -      -       +      -
    434B  ALA*     2.6    59.5    +      -       +      +
    435B  LEU*     4.2    11.4    -      -       +      +
    437B  ILE*     4.1     0.5    -      -       -      +
    438B  SER*     3.8     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 422 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  GLY      5.3     2.0    -      -       -      +
     81B  HIS*     5.1     7.2    -      -       +      +
     82B  VAL*     3.6    45.3    -      -       +      +
     85B  LEU*     3.2    36.8    -      -       +      -
    379B  VAL*     4.3    14.8    -      -       +      -
    418B  LEU*     2.9    13.6    +      -       +      +
    419B  CYS      3.2     9.2    +      -       -      +
    421B  THR*     1.3    75.3    -      -       +      +
    423B  LEU*     1.3    61.8    -      -       +      +
    425B  LEU*     3.2    14.4    +      -       +      +
    426B  ALA*     2.9    33.6    +      -       +      +
    429B  LYS*     5.7     5.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 423 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  GLY      5.9     1.1    -      -       -      +
     82B  VAL*     5.1     9.9    -      -       +      -
    419B  CYS*     2.9    24.4    +      -       -      +
    420B  LEU*     3.8     9.9    -      -       +      +
    422B  LEU*     1.3    84.6    -      -       +      +
    424B  LEU*     1.3    58.4    +      -       -      +
    426B  ALA*     3.2     8.9    +      -       +      +
    427B  ILE*     2.9    44.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 424 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420B  LEU      2.8    16.5    +      -       -      +
    421B  THR*     3.4     8.1    -      -       -      +
    423B  LEU*     1.3    77.5    -      -       -      +
    425B  LEU*     1.3    66.1    +      -       -      +
    427B  ILE*     3.2    10.8    +      -       +      +
    428B  PHE*     3.1    52.0    +      -       +      +
    430B  LYS*     6.1     0.9    -      -       +      -
    433B  PRO*     3.7    31.4    -      -       +      -
    434B  ALA*     5.1     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 425 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379B  VAL*     4.8     9.4    -      -       +      -
    380B  LYS      5.0     0.2    -      -       -      +
    421B  THR*     2.7    24.8    +      -       +      +
    422B  LEU*     3.4    21.3    -      -       +      +
    424B  LEU*     1.3    79.1    -      -       +      +
    426B  ALA*     1.3    59.3    +      -       -      +
    428B  PHE*     5.4     0.4    -      -       -      -
    429B  LYS*     2.6    59.6    +      -       +      +
    430B  LYS      4.2    17.0    -      -       -      +
    431B  ALA*     4.4     0.9    -      -       -      +
    432B  LEU*     3.7    47.1    -      -       +      +
    433B  PRO*     3.9    11.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 426 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    422B  LEU*     2.9    20.0    +      -       +      +
    423B  LEU*     3.3    17.0    -      -       +      +
    425B  LEU*     1.3    79.6    -      -       -      +
    427B  ILE*     1.3    67.6    +      -       +      +
    428B  PHE      3.4     0.9    +      -       -      -
    429B  LYS*     4.3    22.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 427 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    423B  LEU*     2.9    31.5    +      -       +      +
    424B  LEU*     3.2    11.9    +      -       +      +
    426B  ALA*     1.3    82.8    -      -       +      +
    428B  PHE*     1.3    94.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 428 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424B  LEU*     3.1    46.6    +      -       +      +
    425B  LEU      3.4     0.4    -      -       -      -
    426B  ALA      4.4     0.4    -      -       -      +
    427B  ILE*     1.3    97.5    -      -       +      +
    429B  LYS*     1.3    68.1    +      -       -      +
    430B  LYS*     4.3    23.1    -      -       +      +
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Residues in contact with LYS 429 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379B  VAL*     5.1     9.7    -      -       -      +
    422B  LEU*     5.7     4.8    -      -       -      +
    425B  LEU*     2.6    53.7    +      -       +      +
    426B  ALA*     4.3    19.2    -      -       -      +
    428B  PHE*     1.3    76.5    -      -       -      +
    430B  LYS*     1.3    67.0    +      -       -      +
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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