Contacts of the helix formed by residues 588 - 613 (chain A) in PDB entry 1Y8B


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 588 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    586A  ASN*     3.2     8.0    +      -       -      -
    587A  TRP*     1.3    74.2    -      -       -      +
    589A  ALA*     1.3    67.8    +      -       -      +
    590A  GLN*     3.0    10.4    +      -       -      -
    591A  GLU*     3.1    10.7    +      -       -      +
    592A  ILE*     2.8    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 589 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    588A  SER*     1.3    75.3    -      -       -      +
    590A  GLN*     1.3    57.7    +      -       -      +
    592A  ILE*     4.4     9.4    -      -       -      +
    593A  GLN*     2.7    42.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 590 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    588A  SER*     3.0     7.5    -      -       -      -
    589A  ALA*     1.3    78.7    -      -       -      +
    591A  GLU*     1.3    67.1    +      -       -      +
    593A  GLN*     3.9     2.9    -      -       -      +
    594A  GLN*     3.1    36.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 591 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    587A  TRP*     4.1    23.6    -      -       +      -
    588A  SER*     3.1    21.2    +      -       -      +
    590A  GLN*     1.3    80.5    -      -       -      +
    592A  ILE*     1.3    52.0    +      -       -      +
    594A  GLN*     3.0    10.7    +      -       -      +
    595A  GLU*     2.6    62.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 592 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    587A  TRP*     3.2    42.8    -      -       +      +
    588A  SER      2.8    22.1    +      -       -      +
    589A  ALA*     4.2     6.7    -      -       -      +
    591A  GLU*     1.3    71.0    -      -       -      +
    593A  GLN*     1.3    62.0    +      -       +      +
    595A  GLU*     2.6     7.4    +      -       -      +
    596A  LEU*     2.3    48.2    +      -       +      +
    649A  GLY      4.2    18.6    -      -       -      +
    650A  ILE*     5.1     2.2    -      -       +      +
    651A  LEU*     3.9    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 593 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    589A  ALA*     2.7    34.1    +      -       +      +
    590A  GLN*     3.9     4.3    -      -       -      +
    592A  ILE*     1.3    80.4    -      -       +      +
    594A  GLN*     1.3    51.3    +      -       +      +
    596A  LEU*     4.2    11.2    -      -       -      +
    597A  ASP*     2.4    38.4    +      -       -      +
    655A  GLN*     5.4     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 594 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    590A  GLN*     3.1    28.9    +      -       +      +
    591A  GLU*     3.0    11.2    +      -       -      +
    593A  GLN*     1.3    74.5    -      -       +      +
    595A  GLU*     1.3    53.4    +      -       +      +
    597A  ASP*     2.4    29.3    +      -       -      +
    598A  ASN*     2.6    40.3    +      -       -      +
    623A  ILE*     4.9     8.7    -      -       -      +
    624A  HIS*     4.8    17.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 595 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    512A  PRO*     3.8    21.2    -      -       -      +
    513A  ASP*     5.3     1.2    -      -       -      +
    587A  TRP*     6.1     2.5    -      -       +      -
    591A  GLU*     2.6    46.7    +      -       +      +
    592A  ILE*     2.6     8.6    +      -       -      +
    594A  GLN*     1.3    74.6    -      -       +      +
    596A  LEU*     1.3    61.2    +      -       -      +
    597A  ASP      3.3     0.4    -      -       -      -
    598A  ASN*     4.0     9.8    +      -       -      +
    599A  ASN*     2.5    43.8    +      -       -      +
    645A  TRP*     3.2    35.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 596 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    592A  ILE*     2.3    41.2    +      -       +      +
    593A  GLN*     4.2    11.0    -      -       -      +
    595A  GLU*     1.3    68.4    -      -       -      +
    597A  ASP*     1.3    60.1    +      -       +      +
    599A  ASN*     3.8     4.2    -      -       -      +
    600A  VAL*     2.9    45.0    +      -       +      +
    646A  LEU*     5.0    13.2    -      -       +      -
    651A  LEU*     3.8    38.8    -      -       +      -
    656A  VAL*     4.5    11.7    -      -       +      -
    659A  SER*     3.3    37.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 597 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    593A  GLN      2.4    20.5    -      -       -      +
    594A  GLN*     2.4    38.8    +      -       -      +
    596A  LEU*     1.3    78.4    -      -       +      +
    598A  ASN*     1.3    73.8    +      -       -      +
    599A  ASN      2.9     0.5    +      -       -      -
    600A  VAL*     2.9     2.6    +      -       -      +
    601A  GLN*     2.6    38.7    +      -       +      +
    623A  ILE*     4.1    16.4    -      -       +      +
    659A  SER*     5.8     0.2    -      -       -      -
    663A  MET*     4.2    31.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 598 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    511A  MET*     4.4    12.8    -      -       -      +
    512A  PRO      3.8    15.7    +      -       -      +
    513A  ASP*     3.1    34.1    +      -       -      +
    594A  GLN*     2.6    37.0    +      -       -      +
    595A  GLU*     3.7    12.6    +      -       -      +
    597A  ASP*     1.3    89.9    +      -       -      +
    599A  ASN*     1.3    64.6    +      -       -      +
    601A  GLN*     3.2    25.3    -      -       -      +
    602A  GLY*     3.6     1.6    +      -       -      -
    623A  ILE*     4.2    14.2    -      -       -      +
    624A  HIS*     5.4     0.2    -      -       -      -
    638A  SER*     5.2     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 599 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    511A  MET      4.7     7.7    -      -       -      +
    512A  PRO*     5.3     1.7    -      -       -      +
    595A  GLU*     2.5    34.4    +      -       -      +
    596A  LEU*     3.8     4.9    -      -       -      +
    598A  ASN*     1.3    77.9    -      -       -      +
    600A  VAL*     1.3    67.8    +      -       -      +
    602A  GLY*     3.4     8.1    +      -       -      -
    603A  ILE*     3.5    13.7    +      -       -      +
    634A  THR*     4.6     0.2    -      -       -      +
    638A  SER*     4.1    24.8    +      -       -      +
    641A  HIS*     6.5     0.4    -      -       -      -
    642A  ILE*     3.7    27.7    -      -       +      +
    645A  TRP*     3.6    31.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 600 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    596A  LEU*     2.9    45.1    +      -       +      +
    597A  ASP*     2.9     4.0    +      -       -      +
    599A  ASN*     1.3    72.9    -      -       +      +
    601A  GLN*     1.3    57.1    +      -       -      +
    602A  GLY      2.9     1.1    -      -       -      -
    603A  ILE*     2.4    38.5    +      -       +      +
    604A  LEU*     3.1    25.5    +      -       +      -
    642A  ILE*     4.4     8.3    -      -       +      -
    646A  LEU*     6.6     0.4    -      -       +      -
    656A  VAL*     5.1     1.8    -      -       +      -
    659A  SER*     4.9     0.7    -      -       -      +
    660A  LEU*     3.2    33.2    -      -       +      +
    663A  MET*     5.3     3.4    -      -       +      -
    697A  ILE*     4.2    22.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 601 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    511A  MET*     4.7     6.6    -      -       -      +
    597A  ASP*     2.6    30.6    +      -       +      +
    598A  ASN*     3.2    18.4    -      -       -      +
    600A  VAL*     1.3    74.3    -      -       -      +
    602A  GLY*     1.3    89.1    +      -       -      +
    604A  LEU*     4.6     2.7    -      -       -      +
    605A  GLY*     2.8    23.4    +      -       -      -
    621A  PRO      4.9     0.2    +      -       -      -
    622A  ASP*     4.5    23.6    -      -       -      +
    623A  ILE*     5.1     4.2    -      -       +      +
    628A  LEU*     5.8     1.2    -      -       -      +
    630A  GLU*     3.5    14.9    +      -       -      +
    663A  MET*     4.6    12.5    -      -       +      +
    667A  VAL*     4.4    21.7    -      -       +      +
    670A  GLN*     4.4    14.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 602 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    511A  MET*     5.5     2.5    -      -       -      -
    598A  ASN      3.6     2.2    +      -       -      -
    599A  ASN      3.4     8.1    +      -       -      -
    600A  VAL      2.7     5.5    +      -       -      -
    601A  GLN*     1.3    98.2    +      -       -      +
    603A  ILE*     1.3    58.9    +      -       -      -
    606A  TYR*     3.2    24.8    +      -       -      +
    630A  GLU*     3.4    17.7    -      -       -      +
    634A  THR*     3.6    14.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 603 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    599A  ASN      3.5    11.2    -      -       -      +
    600A  VAL*     2.4    27.8    +      -       +      +
    602A  GLY*     1.3    65.2    -      -       -      -
    604A  LEU*     1.3    60.8    +      -       +      +
    605A  GLY      3.0     1.1    -      -       -      -
    606A  TYR*     2.9     2.5    +      -       -      -
    607A  VAL*     2.4    59.6    +      -       +      +
    634A  THR*     4.0     9.9    -      -       +      -
    635A  LEU*     4.7     5.4    -      -       +      -
    639A  SER*     2.9    36.8    -      -       -      +
    642A  ILE*     3.6    23.6    -      -       +      -
    693A  ALA      4.5     7.6    -      -       -      +
    696A  LEU*     4.0    19.5    -      -       +      -
    697A  ILE*     4.5    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 604 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    600A  VAL*     3.1    31.3    +      -       +      +
    601A  GLN      4.3     0.9    -      -       -      +
    603A  ILE*     1.3    76.9    -      -       +      +
    605A  GLY*     1.3    57.5    +      -       -      +
    607A  VAL*     4.3     4.3    -      -       -      -
    608A  VAL*     2.7    37.4    +      -       +      +
    660A  LEU*     4.1    20.0    -      -       +      +
    663A  MET*     4.0    22.9    -      -       +      -
    664A  ALA*     4.1    13.9    -      -       +      +
    667A  VAL*     3.8    15.9    -      -       +      -
    690A  PHE      5.6     0.4    -      -       -      +
    693A  ALA*     3.5    37.0    -      -       +      +
    694A  SER*     4.6     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 605 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    601A  GLN      2.8    17.7    +      -       -      -
    604A  LEU*     1.3    79.0    -      -       -      +
    606A  TYR*     1.3    59.5    +      -       -      +
    608A  VAL*     3.4     9.8    -      -       -      +
    609A  ARG*     3.0    30.3    +      -       -      -
    630A  GLU*     4.3     2.7    -      -       -      -
    667A  VAL*     3.5     6.0    -      -       -      +
    670A  GLN*     3.4    25.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 606 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  ASN*     6.1     0.2    -      -       -      -
    602A  GLY      3.2    17.9    +      -       -      +
    603A  ILE      2.9     1.6    +      -       -      -
    605A  GLY*     1.3    74.8    -      -       -      +
    607A  VAL*     1.3    64.1    +      -       +      +
    609A  ARG*     4.2     3.4    -      -       -      +
    610A  TRP*     2.8    75.3    +      +       +      +
    615A  ILE      4.2     6.5    -      -       -      -
    616A  GLY*     5.3     0.7    -      -       -      -
    630A  GLU*     3.8    21.6    -      -       +      +
    631A  ASP*     3.5    23.8    -      -       -      +
    632A  ARG*     3.1    49.1    +      -       +      -
    634A  THR*     4.3     1.3    -      -       -      +
    635A  LEU*     3.6    32.3    -      -       +      -
    712A  LEU*     4.2    12.6    -      -       +      -
    713A  HIS*     5.2     3.6    -      +       -      -
----------------------------------------------------------
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Residues in contact with VAL 607 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    603A  ILE*     2.4    53.1    +      -       +      +
    604A  LEU*     4.3     0.4    -      -       -      -
    606A  TYR*     1.3    78.7    -      -       +      +
    608A  VAL*     1.3    59.4    +      -       -      +
    610A  TRP*     4.5     1.6    -      -       -      -
    611A  VAL*     2.8    53.1    +      -       +      +
    635A  LEU*     4.5     0.7    -      -       +      -
    689A  ALA*     4.8     3.1    -      -       +      +
    693A  ALA*     3.4    33.4    -      -       +      +
    696A  LEU*     4.0     5.4    -      -       +      -
    712A  LEU*     3.7    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 608 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    604A  LEU*     2.7    32.4    +      -       +      +
    605A  GLY*     3.4    12.1    -      -       -      +
    607A  VAL*     1.3    75.0    -      -       -      +
    609A  ARG*     1.3    67.6    +      -       +      +
    611A  VAL*     4.9     1.3    -      -       -      -
    612A  GLU*     2.4    48.7    +      -       -      +
    667A  VAL*     4.0    14.8    -      -       +      +
    668A  ASP*     6.0     5.4    -      -       -      +
    670A  GLN*     4.9     1.3    -      -       -      +
    671A  ASN*     6.1     2.7    -      -       +      -
    689A  ALA*     5.6     8.9    -      -       +      +
    693A  ALA*     6.1     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 609 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303A  GLU*     5.7     3.4    -      -       -      -
    605A  GLY      3.0    27.2    +      -       -      +
    606A  TYR*     4.4     3.4    -      -       -      +
    608A  VAL*     1.3    87.1    -      -       +      +
    610A  TRP*     1.3    60.3    +      -       -      +
    611A  VAL      3.4     0.2    -      -       -      -
    612A  GLU*     3.6    18.7    -      -       -      +
    613A  GLN      3.3     7.1    +      -       -      -
    614A  GLY      3.2    17.2    +      -       -      -
    615A  ILE*     3.4    30.2    +      -       +      +
    616A  GLY*     4.6    13.7    -      -       -      +
    617A  CYS      5.8     1.2    +      -       -      -
    620A  VAL*     3.6    32.1    -      -       -      +
    630A  GLU*     3.1    39.2    +      -       -      +
    670A  GLN*     3.8    20.1    -      -       +      +
    671A  ASN*     4.9    13.2    -      -       +      +
    674A  ASP*     5.4     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 610 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122A  MET*     4.1    19.7    -      -       +      -
    123A  ASN*     3.5    33.4    -      -       -      -
    282A  ASP*     6.5     0.9    -      -       +      -
    606A  TYR*     2.8    60.6    +      +       +      +
    607A  VAL*     4.2     1.6    -      -       -      +
    609A  ARG*     1.3    80.4    -      -       -      +
    611A  VAL*     1.3    63.3    +      -       +      +
    614A  GLY*     3.0    24.6    +      -       -      -
    615A  ILE      3.4    31.4    +      -       -      +
    632A  ARG*     4.3     7.6    -      -       -      -
    712A  LEU*     5.4     2.0    -      -       +      -
    713A  HIS*     5.4     3.5    +      +       -      -
    716A  ARG*     3.2    50.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 611 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    607A  VAL*     2.8    39.4    +      -       +      +
    608A  VAL      4.7     0.2    -      -       -      +
    610A  TRP*     1.3    81.0    -      -       +      +
    612A  GLU*     1.3    62.9    +      -       -      +
    614A  GLY      4.6     0.2    -      -       -      -
    689A  ALA*     3.6    27.6    -      -       +      -
    712A  LEU*     4.5     4.3    -      -       +      -
    716A  ARG*     4.0    27.1    -      -       +      +
    719A  GLU*     3.0    42.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 612 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    608A  VAL*     2.4    41.8    +      -       +      +
    609A  ARG*     3.6    19.7    -      -       -      +
    611A  VAL*     1.3    82.9    -      -       -      +
    613A  GLN*     1.3    85.3    +      -       +      +
    671A  ASN*     2.7    27.1    +      -       -      +
    678A  ARG*     2.7    38.7    +      -       -      +
    689A  ALA*     5.8     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 613 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  ARG*     6.0     1.8    -      -       -      +
    609A  ARG      3.3     4.2    +      -       -      +
    612A  GLU*     1.3    97.5    -      -       +      +
    614A  GLY*     1.3    70.4    +      -       -      +
    615A  ILE*     3.5    28.3    -      -       +      +
    671A  ASN*     4.6     3.5    +      -       -      +
    676A  ALA*     5.2     8.7    +      -       -      +
    678A  ARG*     3.6    36.5    -      -       -      +
----------------------------------------------------------
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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