Contacts of the helix formed by residues 392 - 417 (chain A) in PDB entry 5UQ9


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 392 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379A  ALA*     2.9    22.1    -      -       -      +
    382A  ARG*     2.7    37.9    +      -       -      -
    386A  LEU*     4.1    16.8    -      -       +      -
    388A  ASN      4.2     0.2    +      -       -      -
    389A  LEU      3.4    14.0    +      -       -      +
    390A  LEU      3.1     2.4    -      -       -      -
    391A  LEU*     1.3    79.1    -      -       -      +
    393A  ASP*     1.3    76.4    +      -       -      +
    394A  PHE      3.9     3.6    +      -       -      -
    395A  PHE*     3.5    13.5    -      -       +      -
    396A  LYS*     2.8    32.5    +      -       -      +
     79H  GLN*     5.3     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 393 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382A  ARG*     5.9     0.2    -      -       -      +
    391A  LEU      4.1     1.2    +      -       -      +
    392A  ASP*     1.3    83.6    +      -       -      +
    394A  PHE*     1.3    62.3    +      -       -      +
    396A  LYS*     3.5    28.6    +      -       -      +
    397A  SER*     3.0    29.3    +      -       -      -
    303B  LYS*     5.1     4.9    +      -       -      -
     79H  GLN*     5.0    19.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 394 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227A  GLU*     6.0     3.1    -      -       +      -
    328A  TYR*     3.4    25.8    -      -       -      -
    372A  PHE*     5.4     0.2    -      +       -      -
    375A  LYS*     3.6    52.7    -      -       +      -
    382A  ARG*     3.9    21.5    -      -       -      +
    392A  ASP*     3.4     5.9    +      -       -      +
    393A  ASP*     1.3    78.6    -      -       -      +
    395A  PHE*     1.3    79.5    +      +       +      +
    397A  SER*     4.2     2.8    -      -       -      -
    398A  ALA*     3.2    25.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 395 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332A  ILE*     4.0    28.9    -      -       +      +
    372A  PHE*     3.4    33.2    -      +       -      -
    375A  LYS*     3.9     6.5    -      -       +      -
    376A  ILE*     3.5    31.2    -      -       +      -
    379A  ALA*     3.5    25.6    -      -       +      -
    389A  LEU*     3.5    39.7    -      -       +      +
    390A  LEU*     4.8     2.2    -      -       -      -
    392A  ASP*     3.4    15.8    +      -       +      +
    393A  ASP      3.2     0.2    -      -       -      -
    394A  PHE*     1.3    92.5    -      +       -      +
    396A  LYS*     1.3    60.6    +      -       -      +
    397A  SER      3.2     1.8    -      -       -      -
    398A  ALA*     3.9     3.2    -      -       -      +
    399A  VAL*     3.0    35.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 396 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    390A  LEU*     3.4    17.3    +      -       -      +
    392A  ASP      2.8    24.9    +      -       -      +
    393A  ASP*     3.5    32.2    +      -       -      +
    395A  PHE*     1.3    74.6    -      -       -      +
    397A  SER*     1.3    69.7    +      -       -      +
    399A  VAL*     3.8     4.4    +      -       -      +
    400A  GLU*     3.1    24.8    +      -       -      +
    430A  TYR*     5.4     1.6    +      -       -      -
    303B  LYS*     3.8    39.9    +      -       -      +
    304B  LEU*     3.9    16.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 397 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    393A  ASP      3.0    20.0    +      -       -      -
    394A  PHE*     4.2     2.9    -      -       -      -
    396A  LYS*     1.3    86.6    -      -       -      +
    398A  ALA*     1.3    59.5    +      -       -      +
    400A  GLU*     3.3     7.7    +      -       -      +
    401A  ASN*     2.9    47.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 398 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328A  TYR*     3.6    32.3    -      -       +      +
    332A  ILE*     3.7    12.3    -      -       +      -
    394A  PHE*     3.2    23.2    +      -       +      +
    395A  PHE*     3.4     1.1    +      -       -      +
    397A  SER*     1.3    76.6    -      -       -      +
    399A  VAL*     1.3    57.8    +      -       -      +
    401A  ASN*     3.4     8.0    +      -       -      +
    402A  CYS*     3.0    35.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 399 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329A  ALA*     4.9     6.0    -      -       +      +
    332A  ILE*     3.9    28.3    -      -       +      -
    333A  ILE*     4.2    12.1    -      -       +      -
    390A  LEU*     4.3     7.2    -      -       +      -
    395A  PHE      3.0    21.6    +      -       -      +
    396A  LYS*     4.0     5.6    -      -       -      +
    398A  ALA*     1.3    74.6    -      -       -      +
    400A  GLU*     1.3    58.4    +      -       -      +
    402A  CYS*     3.2     4.8    +      -       -      +
    403A  GLN*     2.8    31.1    +      -       +      +
    406A  TRP*     4.5    13.0    -      -       +      -
    430A  TYR*     3.6    42.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 400 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    396A  LYS      3.1    19.2    +      -       -      +
    397A  SER*     3.3     9.6    +      -       -      +
    399A  VAL*     1.3    78.5    -      -       -      +
    401A  ASN*     1.3    64.2    +      -       -      +
    402A  CYS      3.5     0.3    +      -       -      -
    403A  GLN*     3.6    27.8    +      -       -      +
    404A  ASP*     4.8     1.4    +      -       -      +
    430A  TYR*     5.0     2.6    +      -       -      -
    305B  LYS*     3.6    30.1    +      -       -      +
    308B  GLN*     3.9    26.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 401 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325A  LYS*     3.5    20.5    +      -       -      +
    397A  SER*     2.9    36.0    +      -       -      +
    398A  ALA*     3.9     8.0    -      -       -      +
    400A  GLU*     1.3    80.8    -      -       -      +
    402A  CYS*     1.3    62.6    +      -       -      +
    404A  ASP*     5.1     2.3    +      -       -      +
    405A  SER*     5.5     1.6    +      -       -      -
    114G  ARG*     6.2     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 402 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    324A  ARG*     5.8     1.3    -      -       -      -
    325A  LYS*     3.5    48.3    -      -       +      +
    328A  TYR*     3.8    24.2    -      -       -      -
    329A  ALA*     3.8    11.9    -      -       +      -
    398A  ALA*     3.0    24.4    +      -       -      +
    399A  VAL      3.2     1.3    +      -       -      +
    401A  ASN*     1.3    79.5    -      -       -      +
    403A  GLN*     1.3    58.6    +      -       -      +
    404A  ASP      3.4     2.7    -      -       -      -
    405A  SER*     3.5     2.7    +      -       -      +
    406A  TRP*     2.8    30.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 403 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    399A  VAL*     2.8    17.2    +      -       +      +
    400A  GLU*     3.6    29.5    +      -       -      +
    401A  ASN      3.5     2.0    -      -       -      -
    402A  CYS*     1.3    77.4    -      -       -      +
    404A  ASP*     1.3    63.6    +      -       -      +
    406A  TRP*     3.2    13.3    +      -       +      +
    407A  ARG*     2.6    72.4    +      -       +      +
    430A  TYR*     3.7    12.5    +      -       +      -
    305B  LYS      3.5     6.9    +      -       -      +
    306B  GLY*     2.8    36.7    +      -       -      -
    307B  PRO*     3.9     3.2    -      -       +      +
    308B  GLN*     4.9     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 404 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    400A  GLU      4.8     2.4    +      -       -      +
    401A  ASN      5.1     1.9    +      -       -      +
    402A  CYS      3.4     0.2    -      -       -      -
    403A  GLN*     1.3    79.3    -      -       -      +
    405A  SER*     1.3    57.2    +      -       -      +
    407A  ARG*     3.4     7.2    +      -       -      +
    408A  ARG*     3.0    51.3    +      -       -      +
    309B  LYS*     3.5    24.6    +      -       -      +
    118G  ALA*     4.2    10.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 405 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322A  ASP*     2.6    49.7    +      -       -      +
    325A  LYS*     3.5    30.9    +      -       -      +
    401A  ASN      5.5     1.6    +      -       -      -
    402A  CYS*     3.5     2.9    +      -       -      -
    403A  GLN      3.4     0.2    -      -       -      -
    404A  ASP*     1.3    76.4    -      -       -      +
    406A  TRP*     1.3    65.6    +      -       -      +
    408A  ARG*     3.2    13.8    +      -       -      +
    409A  ALA*     3.1    18.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 406 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  ALA*     3.5    29.1    -      -       +      +
    329A  ALA*     3.5    23.1    -      -       +      -
    330A  SER*     3.2    28.7    +      -       -      -
    333A  ILE*     3.7    23.8    -      -       +      -
    399A  VAL*     4.5     8.7    -      -       +      -
    402A  CYS      2.8    19.9    +      -       -      +
    403A  GLN*     3.2    15.0    +      -       +      +
    405A  SER*     1.3    77.7    -      -       -      +
    407A  ARG*     1.3    61.7    +      -       +      +
    409A  ALA*     3.5     1.6    +      -       -      +
    410A  VAL*     3.1    37.4    +      -       +      +
    423A  PHE*     3.7    11.9    +      -       +      +
    426A  ALA*     3.4    21.5    -      -       +      -
    427A  LEU*     3.3    43.6    -      -       +      +
    430A  TYR*     4.3    12.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 407 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403A  GLN*     2.6    51.8    +      -       -      +
    404A  ASP*     4.0     6.3    -      -       -      +
    406A  TRP*     1.3    72.9    -      -       -      +
    408A  ARG*     1.3    61.1    +      -       -      +
    410A  VAL*     3.9     0.6    -      -       -      +
    411A  SER*     2.8    36.6    +      -       -      +
    427A  LEU*     4.0    20.8    -      -       +      +
    430A  TYR*     4.6     1.4    -      -       -      -
    431A  ASP*     2.7    40.0    +      -       -      -
    434A  ARG*     4.3     0.2    -      -       -      +
    307B  PRO*     3.5    31.1    -      -       -      +
    414B  VAL*     2.6    48.5    +      -       +      +
    415B  GLN*     4.3    12.3    -      -       +      +
    417B  GLY*     3.5     5.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 408 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319A  PHE*     4.0     6.9    -      -       +      -
    322A  ASP*     2.9    44.0    +      -       -      +
    404A  ASP*     3.0    52.0    +      -       -      +
    405A  SER*     3.2    19.8    +      -       -      +
    406A  TRP      3.3     0.2    -      -       -      -
    407A  ARG*     1.3    76.2    -      -       -      +
    409A  ALA*     1.3    59.1    +      -       -      +
    411A  SER*     4.1     4.4    -      -       -      -
    412A  THR*     2.8    36.7    +      -       -      +
    415B  GLN*     6.1     1.6    -      -       -      +
    118G  ALA*     5.9     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 409 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  LEU*     4.7     7.5    -      -       +      +
    319A  PHE*     3.8    24.5    -      -       +      -
    322A  ASP*     4.0    18.4    -      -       +      +
    323A  ILE*     4.4     6.5    -      -       +      +
    326A  ALA*     4.3     9.6    -      -       +      -
    405A  SER      3.1    18.3    +      -       -      +
    406A  TRP      4.0     2.9    -      -       -      +
    408A  ARG*     1.3    75.5    -      -       -      +
    410A  VAL*     1.3    59.7    +      -       +      +
    412A  THR*     3.9     0.5    -      -       -      -
    413A  GLY*     2.9    26.9    +      -       -      -
    420A  MET*     4.1     5.9    -      -       -      +
    423A  PHE*     6.3     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 410 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  ALA*     5.4     1.1    -      -       +      -
    406A  TRP*     3.1    37.3    +      -       +      +
    407A  ARG      3.9     3.1    -      -       -      +
    409A  ALA*     1.3    77.9    -      -       +      +
    411A  SER*     1.3    56.8    +      -       -      +
    414A  VAL*     3.0    33.9    +      -       +      +
    420A  MET*     3.3     8.6    -      -       +      +
    423A  PHE*     4.4    22.4    -      -       +      +
    424A  THR*     4.0    22.9    -      -       +      -
    427A  LEU*     4.1     9.9    -      -       +      -
    414B  VAL*     3.8    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 411 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    407A  ARG      2.8    24.6    +      -       -      -
    408A  ARG*     4.1     4.3    -      -       -      -
    410A  VAL*     1.3    78.0    -      -       -      +
    412A  THR*     1.3    61.1    +      -       -      +
    414A  VAL*     3.3     6.8    +      -       -      +
    415A  GLN*     3.1    28.0    +      -       -      +
    411B  SER*     3.4    24.7    +      -       -      +
    414B  VAL*     3.6     8.9    -      -       -      +
    415B  GLN*     3.4    27.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 412 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208A  VAL*     4.2    10.3    -      -       +      -
    310A  PHE*     4.0    22.3    -      -       +      -
    312A  PHE*     4.4    10.9    -      -       +      -
    319A  PHE*     3.6    31.4    -      -       +      -
    408A  ARG*     2.8    26.6    +      -       -      +
    409A  ALA      3.9     0.2    -      -       -      -
    411A  SER*     1.3    77.4    -      -       -      +
    413A  GLY*     1.3    57.1    +      -       -      +
    415A  GLN*     3.3     8.0    +      -       -      +
    416A  ALA*     2.9    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 413 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204A  LEU*     4.0    13.6    -      -       -      +
    208A  VAL*     5.1     0.2    -      -       -      -
    409A  ALA      2.9    17.5    +      -       -      -
    412A  THR*     1.3    76.5    -      -       -      +
    414A  VAL*     1.3    61.1    +      -       -      +
    416A  ALA*     3.2     5.7    +      -       -      -
    417A  GLY      3.0     4.0    +      -       -      -
    418A  ILE*     3.0    28.7    +      -       -      +
    420A  MET*     3.8    21.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 414 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410A  VAL*     3.0    28.6    +      -       +      +
    411A  SER*     3.6     6.5    -      -       -      +
    413A  GLY*     1.3    75.2    -      -       -      +
    415A  GLN*     1.3    61.1    +      -       -      +
    417A  GLY      3.3     1.2    +      -       -      -
    418A  ILE      5.3     1.6    -      -       -      +
    420A  MET*     4.3     9.2    -      -       +      -
    424A  THR*     4.9     6.3    -      -       +      -
    407B  ARG*     2.8    58.5    +      -       +      +
    410B  VAL*     3.7    24.5    -      -       +      -
    411B  SER*     4.5     4.3    -      -       -      +
    414B  VAL*     5.7     0.2    -      -       +      -
    424B  THR*     5.1     0.4    -      -       +      -
    427B  LEU*     3.6    25.6    -      -       +      -
    431B  ASP*     5.4     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 415 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  PRO*     3.7    18.0    -      -       -      +
    310A  PHE*     4.0    25.8    -      -       +      +
    411A  SER      3.1    15.8    +      -       -      +
    412A  THR*     3.3     8.3    +      -       -      +
    414A  VAL*     1.3    75.7    -      -       -      +
    416A  ALA*     1.3    60.9    +      -       -      +
    417A  GLY      3.6     0.3    +      -       -      -
    404B  ASP      5.8     0.2    +      -       -      -
    407B  ARG*     3.7    36.0    +      -       -      +
    408B  ARG*     4.4     7.1    -      -       -      +
    411B  SER*     3.9    13.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 416 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207A  ASP      5.7     0.4    -      -       -      +
    208A  VAL*     3.9     9.4    -      -       +      -
    307A  PRO*     3.5    13.4    -      -       -      +
    310A  PHE*     3.4    32.3    -      -       +      +
    412A  THR      2.9    16.9    +      -       -      +
    413A  GLY      3.7     0.9    -      -       -      +
    414A  VAL      3.2     0.6    -      -       -      -
    415A  GLN*     1.3    77.4    -      -       -      +
    417A  GLY*     1.3    60.5    +      -       -      +
    418A  ILE*     3.7    25.6    -      -       +      +
    434B  ARG*     4.3     2.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 417 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  PRO*     3.6     3.1    -      -       -      +
    413A  GLY      3.0     3.6    +      -       -      -
    414A  VAL      3.3     4.8    +      -       -      -
    415A  GLN      3.3     0.8    +      -       -      -
    416A  ALA*     1.3    79.4    -      -       -      +
    418A  ILE*     1.3    61.9    +      -       -      +
    407B  ARG*     3.6    21.3    -      -       -      -
    431B  ASP*     3.6     8.0    -      -       -      +
    434B  ARG*     2.8    30.7    +      -       -      -
    435B  HIS*     3.3    15.1    -      -       -      -
----------------------------------------------------------
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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