Contacts of the helix formed by residues 647 - 671 (chain C) in PDB entry 3F7F


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 PHE 647 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579C  ILE*     3.6    33.0    -      -       +      -
    580C  PRO*     3.8    29.4    -      -       +      -
    583C  LEU*     3.9     5.2    -      -       +      -
    637C  PHE*     3.6    29.6    -      +       +      -
    642C  LEU*     4.0    28.7    -      -       +      -
    643C  ASP      3.0    20.0    +      -       -      +
    644C  THR      4.1     1.1    -      -       -      -
    646C  ILE*     1.3    95.9    -      -       +      +
    648C  GLY*     1.3    54.0    +      -       -      +
    649C  GLN      3.1     3.5    +      -       -      -
    650C  HIS*     3.2    22.6    +      +       +      +
    651C  ILE*     2.7    42.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 648 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    644C  THR      3.2    19.6    +      -       -      -
    645C  GLU*     3.2     8.8    +      -       -      -
    646C  ILE      3.1     5.9    -      -       -      -
    647C  PHE*     1.3    77.6    -      -       -      +
    649C  GLN*     1.3    61.9    +      -       -      +
    651C  ILE*     3.9     5.0    -      -       -      +
    652C  SER*     3.1    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 649 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    645C  GLU      4.8     0.6    +      -       -      -
    646C  ILE      4.3     5.6    +      -       -      +
    647C  PHE      3.1     0.6    -      -       -      -
    648C  GLY*     1.3    75.3    -      -       -      +
    650C  HIS*     1.3    71.8    +      -       +      +
    652C  SER*     3.0    14.4    +      -       -      -
    653C  THR*     2.9    47.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 650 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    580C  PRO*     4.4     5.9    +      -       +      +
    583C  LEU*     4.2    14.5    -      -       +      +
    584C  ASN*     4.1    39.8    +      -       -      -
    587C  ILE*     3.4    31.4    -      -       +      +
    588C  ASN*     4.2     9.9    -      -       -      -
    637C  PHE*     5.0     1.1    -      -       +      -
    646C  ILE      5.7     0.9    -      -       -      -
    647C  PHE*     3.2    36.8    +      +       +      +
    649C  GLN*     1.3    84.3    -      -       +      +
    651C  ILE*     1.3    57.4    +      -       -      +
    653C  THR*     3.1     3.9    +      -       -      -
    654C  LEU*     2.8    41.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 651 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    546C  THR*     4.4     8.5    -      -       +      +
    550C  PHE*     3.7    32.5    -      -       +      -
    634C  LEU*     4.1     3.5    -      -       +      +
    637C  PHE*     3.9    34.1    -      -       +      -
    642C  LEU      5.4     1.1    -      -       -      +
    644C  THR*     4.0    27.8    -      -       -      +
    647C  PHE*     2.7    37.9    +      -       +      +
    648C  GLY*     3.9     4.9    -      -       -      +
    650C  HIS*     1.3    73.5    -      -       -      +
    652C  SER*     1.3    57.2    +      -       -      +
    654C  LEU*     3.7     7.8    -      -       -      +
    655C  LEU*     3.0    40.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 652 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648C  GLY      3.1    12.3    +      -       -      -
    649C  GLN*     3.0    24.2    +      -       -      -
    651C  ILE*     1.3    79.3    -      -       -      +
    653C  THR*     1.3    63.8    +      -       -      +
    655C  LEU*     4.0     8.4    -      -       -      +
    656C  ASP*     3.2    23.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 653 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    587C  ILE*     3.8    27.4    -      -       +      -
    592C  LYS*     3.9    30.8    +      -       -      +
    649C  GLN*     2.9    37.5    +      -       -      +
    650C  HIS*     3.6     8.1    +      -       -      -
    652C  SER*     1.3    76.9    +      -       -      +
    654C  LEU*     1.3    60.3    +      -       -      +
    656C  ASP*     3.4     6.0    +      -       +      +
    657C  LEU*     2.9    32.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 654 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    583C  LEU*     5.2     0.4    -      -       +      -
    586C  LEU*     5.7     1.3    -      -       +      -
    587C  ILE*     3.7    30.3    -      -       +      -
    591C  MET*     5.0     8.5    -      -       -      -
    630C  THR*     3.7    23.3    -      -       +      +
    633C  VAL*     3.9    31.0    -      -       +      -
    634C  LEU*     3.5    25.4    -      -       +      -
    637C  PHE*     4.0    13.9    -      -       +      -
    650C  HIS*     2.8    26.6    +      -       +      +
    651C  ILE*     3.7     0.9    -      -       -      +
    653C  THR*     1.3    75.2    -      -       -      +
    655C  LEU*     1.3    59.7    +      -       -      +
    657C  LEU*     3.0     9.3    +      -       +      +
    658C  HIS*     2.7    32.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 655 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    532C  PHE*     3.7    45.7    -      -       +      +
    535C  ILE*     4.1    28.3    -      -       +      -
    536C  ILE*     3.6    20.9    -      -       +      +
    546C  THR*     6.4     0.2    -      -       +      -
    550C  PHE*     4.7     4.5    -      -       +      -
    634C  LEU*     3.7    19.1    -      -       +      -
    651C  ILE*     3.0    38.1    +      -       +      +
    652C  SER*     4.1     7.6    -      -       -      +
    653C  THR      3.4     0.2    -      -       -      -
    654C  LEU*     1.3    76.0    -      -       -      +
    656C  ASP*     1.3    61.3    +      -       -      +
    658C  HIS*     3.8     5.4    +      -       -      +
    659C  TYR*     3.2    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 656 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    536C  ILE*     4.4    10.2    -      -       +      +
    592C  LYS*     6.0     0.9    -      -       -      -
    652C  SER      3.2    19.3    +      -       -      +
    653C  THR*     3.6     6.2    -      -       -      +
    654C  LEU      3.1     0.6    -      -       -      -
    655C  LEU*     1.3    76.7    -      -       -      +
    657C  LEU*     1.3    69.3    +      -       -      +
    659C  TYR*     3.5     4.5    +      -       -      +
    660C  LYS*     2.6    63.7    +      -       -      +
    714C  ILE*     3.7    14.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 657 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    587C  ILE*     4.9     4.9    -      -       +      -
    591C  MET*     4.4    22.7    -      -       +      -
    592C  LYS*     4.3    22.7    -      -       +      -
    630C  THR*     4.8     1.6    -      -       +      -
    653C  THR*     2.9    37.6    +      -       +      +
    654C  LEU*     3.0     9.2    +      -       +      +
    656C  ASP*     1.3    80.4    -      -       -      +
    658C  HIS*     1.3    60.9    +      -       -      +
    660C  LYS*     3.4     4.5    +      -       +      +
    661C  GLN*     2.8    45.5    +      -       -      +
    710C  TYR*     3.4    51.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 658 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    529C  SER*     2.8    47.3    +      -       -      -
    532C  PHE*     3.6    17.3    -      -       +      +
    533C  LEU*     4.0    17.9    -      -       +      +
    627C  TYR*     3.5    24.9    -      +       -      -
    630C  THR*     3.7     8.9    -      -       +      +
    631C  LEU*     3.7    21.6    -      -       +      +
    634C  LEU*     3.9    13.9    -      -       +      -
    654C  LEU      2.7    16.9    +      -       -      +
    655C  LEU      3.8     5.8    +      -       -      +
    657C  LEU*     1.3    78.1    -      -       -      +
    659C  TYR*     1.3    58.1    +      -       -      +
    661C  GLN*     3.1    14.8    +      -       -      +
    662C  PHE*     2.8    30.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 659 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    533C  LEU*     3.4    27.6    -      -       +      -
    536C  ILE*     3.6    33.7    -      -       +      -
    537C  THR*     3.9    20.1    -      -       +      +
    655C  LEU      3.2    15.6    +      -       -      +
    656C  ASP*     3.7     5.6    -      -       -      +
    657C  LEU      3.3     0.2    -      -       -      -
    658C  HIS*     1.3    80.3    +      -       -      +
    660C  LYS*     1.3    64.1    +      -       -      +
    662C  PHE*     3.3     2.4    +      -       -      +
    663C  LEU*     3.0    50.5    +      -       +      +
    714C  ILE*     3.7    37.3    +      -       +      -
    716C  GLU*     3.7     6.6    +      -       -      -
    725C  ARG*     3.1    30.4    -      -       -      +
    729C  ILE*     4.1     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 660 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    656C  ASP*     2.6    48.9    +      -       -      +
    657C  LEU*     3.9     4.3    -      -       +      +
    659C  TYR*     1.3    79.3    -      -       +      +
    661C  GLN*     1.3    57.2    +      -       -      +
    663C  LEU*     3.4     5.6    +      -       -      +
    664C  LEU*     2.9    32.0    +      -       -      +
    709C  VAL*     3.6    31.8    -      -       +      +
    710C  TYR*     2.9    34.4    +      -       +      +
    711C  ASN      4.8     0.4    -      -       -      -
    712C  ALA*     3.5    20.5    +      -       +      +
    714C  ILE*     3.9    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 661 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    591C  MET*     3.5     8.1    -      -       -      +
    623C  LEU*     4.2    21.3    -      -       +      +
    626C  HIS*     3.7     1.2    +      -       -      +
    627C  TYR*     3.2    35.7    -      -       +      -
    630C  THR*     2.8    28.1    +      -       -      -
    657C  LEU*     2.8    30.9    +      -       -      +
    658C  HIS*     3.3    15.1    -      -       -      +
    660C  LYS*     1.3    73.0    -      -       -      +
    662C  PHE*     1.3    69.6    +      -       -      +
    664C  LEU*     3.3     4.3    +      -       -      +
    665C  LEU*     2.9    27.9    +      -       -      +
    710C  TYR*     3.0    31.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 662 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    397C  ILE*     5.0     3.8    -      -       +      -
    398C  VAL*     4.1    26.7    -      -       +      -
    529C  SER*     4.1     9.2    -      -       -      -
    533C  LEU*     3.5    37.7    -      -       +      -
    627C  TYR*     3.6    33.6    -      +       +      -
    658C  HIS*     2.8    19.1    +      -       +      +
    659C  TYR      3.5     3.8    -      -       -      +
    661C  GLN*     1.3    75.8    -      -       -      +
    663C  LEU*     1.3    67.5    +      -       -      +
    665C  LEU*     2.9     6.3    +      -       -      +
    666C  ASN*     2.7    43.0    +      -       -      +
    729C  ILE*     3.8    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 663 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    659C  TYR*     3.0    46.8    +      -       +      +
    660C  LYS*     3.6     6.3    -      -       -      +
    662C  PHE*     1.3    78.4    -      -       +      +
    664C  LEU*     1.3    57.9    +      -       -      +
    666C  ASN*     3.0     9.5    +      -       +      +
    667C  LEU*     2.8    43.0    +      -       +      +
    714C  ILE*     4.9     8.7    -      -       +      -
    725C  ARG*     5.3     6.5    -      -       +      -
    729C  ILE*     3.3    41.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 664 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    616C  LEU*     6.3     0.2    -      -       +      -
    619C  LEU*     4.0    20.0    -      -       +      +
    620C  HIS*     5.4     2.7    -      -       +      -
    623C  LEU*     2.9    40.4    -      -       +      -
    660C  LYS      2.9    20.7    +      -       -      +
    661C  GLN      3.8     3.4    -      -       -      +
    663C  LEU*     1.3    72.8    -      -       -      +
    665C  LEU*     1.3    61.1    +      -       +      +
    667C  LEU*     3.1     9.8    +      -       +      +
    668C  TYR*     2.8    29.5    +      -       +      +
    675C  LEU*     4.0    31.0    -      -       +      -
    679C  LEU*     4.4     7.9    -      -       +      -
    709C  VAL*     4.1    22.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 665 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    398C  VAL*     3.9    30.5    -      -       +      -
    620C  HIS*     3.4    27.4    -      -       +      +
    623C  LEU*     4.3    10.5    -      -       +      +
    624C  SER*     3.3    34.5    -      -       -      +
    627C  TYR*     3.9    30.3    -      -       +      -
    661C  GLN      2.9    19.7    +      -       -      +
    662C  PHE*     2.9     4.8    +      -       -      +
    664C  LEU*     1.3    77.8    -      -       +      +
    666C  ASN*     1.3    61.2    +      -       -      +
    668C  TYR*     3.5     5.2    +      -       -      +
    669C  ARG*     3.0    35.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 666 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    398C  VAL*     4.1    14.2    -      -       +      +
    400C  LYS*     4.0    15.4    +      -       -      +
    662C  PHE*     2.7    35.9    +      -       +      +
    663C  LEU*     3.2    14.4    -      -       -      +
    665C  LEU*     1.3    76.0    -      -       -      +
    667C  LEU*     1.3    65.2    +      -       +      +
    669C  ARG*     3.4     7.8    +      -       -      +
    670C  GLN*     3.1    48.1    +      -       -      +
    728C  ILE*     3.4    26.8    +      -       -      +
    729C  ILE*     4.2     5.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 667 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    663C  LEU*     2.8    33.4    +      -       +      +
    664C  LEU*     3.7     7.6    -      -       +      +
    666C  ASN*     1.3    73.0    -      -       +      +
    668C  TYR*     1.3    64.3    +      -       -      +
    670C  GLN*     3.8     6.6    -      -       +      +
    671C  ASP*     3.1    26.5    +      -       -      +
    675C  LEU*     4.2    28.0    -      -       +      +
    678C  VAL*     5.8     4.0    -      -       +      -
    728C  ILE*     4.2    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 668 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    387C  VAL*     4.1    11.8    -      -       +      +
    616C  LEU*     4.1    24.9    -      -       +      -
    617C  GLU*     2.5    42.2    +      -       -      -
    620C  HIS*     3.1    56.3    -      +       +      -
    664C  LEU*     2.8    18.3    +      -       +      +
    665C  LEU*     3.5     4.5    -      -       -      +
    666C  ASN      3.2     0.2    -      -       -      -
    667C  LEU*     1.3    79.0    -      -       -      +
    669C  ARG*     1.3    72.3    +      -       +      +
    672C  LYS*     3.3    54.5    +      -       +      +
    675C  LEU*     3.6    13.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 669 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    390C  GLN*     5.0     5.5    +      -       -      -
    396C  ASP*     3.0    32.9    +      -       -      -
    398C  VAL*     3.5    13.4    -      -       -      +
    399C  THR*     3.1    40.4    +      -       +      +
    400C  LYS      5.7     0.2    -      -       -      +
    406C  ARG*     5.5     3.1    +      -       -      -
    410C  ASN*     5.7     3.0    -      -       -      +
    413C  SER*     2.8    28.6    +      -       -      +
    414C  ARG*     6.5     0.7    -      -       -      -
    620C  HIS*     2.6    38.9    +      -       -      -
    624C  SER*     4.5     2.0    +      -       -      -
    665C  LEU*     3.0    29.6    +      -       -      +
    666C  ASN*     3.8    10.1    -      -       -      +
    668C  TYR*     1.3    86.5    -      -       +      +
    670C  GLN*     1.3    59.6    +      -       -      +
    672C  LYS*     4.4     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 670 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    400C  LYS*     3.5    14.3    -      -       -      +
    406C  ARG*     3.8    33.1    -      -       -      +
    413C  SER*     4.7     4.0    +      -       -      -
    666C  ASN*     3.1    35.7    +      -       -      +
    667C  LEU*     3.8     9.6    -      -       +      +
    668C  TYR      3.3     0.4    -      -       -      -
    669C  ARG*     1.3    81.5    -      -       -      +
    671C  ASP*     1.3    66.8    +      -       +      +
    728C  ILE*     3.9    19.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 671 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    413C  SER*     5.3     1.6    -      -       -      -
    667C  LEU      3.1    10.4    +      -       -      +
    669C  ARG      3.4     0.8    -      -       -      -
    670C  GLN*     1.3    86.1    -      -       +      +
    672C  LYS*     1.3    63.4    +      -       -      +
    673C  CYS*     3.4     9.0    +      -       -      +
    674C  LEU*     3.0    40.5    +      -       +      +
    675C  LEU*     3.0    18.4    +      -       -      +
----------------------------------------------------------
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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