Contacts of the helix formed by residues 713 - 736 (chain C) in PDB entry 1XFV


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 713 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    712C  PHE*     1.3    75.9    -      -       -      +
    714C  GLN*     1.3    69.1    +      -       -      +
    715C  GLU*     4.5     7.3    +      -       -      +
    716C  LYS*     2.7    28.6    +      -       -      +
    717C  LYS*     3.1     8.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 714 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    712C  PHE      4.0     0.2    +      -       -      -
    713C  SER*     1.3    69.7    -      -       -      +
    715C  GLU*     1.3    68.6    +      -       -      +
    717C  LYS*     2.9    52.8    +      -       -      +
    718C  ARG*     3.2    19.7    +      -       -      +
    126Q  ARG*     3.6    34.9    +      -       -      +
    129Q  ASP*     4.0    11.9    +      -       -      +
    132Q  GLY*     3.7    23.7    +      -       -      +
    134Q  GLY*     4.4     9.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 715 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    713C  SER*     2.9    11.6    +      -       -      +
    714C  GLN*     1.3    75.0    -      -       -      +
    716C  LYS*     1.3    65.4    +      -       -      +
    718C  ARG*     2.7    40.3    +      -       -      +
    719C  LYS*     3.2    38.8    +      -       -      +
    767C  GLN*     2.5    44.0    +      -       -      +
    797C  ILE*     5.9     0.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 716 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    712C  PHE*     3.0    56.2    -      -       +      +
    713C  SER*     2.7    22.7    +      -       -      +
    715C  GLU*     1.3    73.6    -      -       -      +
    717C  LYS*     1.3    70.3    +      -       -      +
    719C  LYS*     2.5    28.8    +      -       +      +
    720C  ILE*     2.6    35.6    +      -       +      +
    790C  PHE*     5.9     1.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 717 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    709C  ASN*     3.0    32.3    +      -       +      +
    710C  HIS*     4.0     9.0    +      -       -      +
    712C  PHE*     3.0    24.2    +      -       +      +
    713C  SER      3.1     6.6    +      -       -      +
    714C  GLN*     2.9    47.5    +      -       -      +
    716C  LYS*     1.3    78.1    -      -       -      +
    718C  ARG*     1.3    63.8    +      -       -      +
    720C  ILE*     3.2     9.9    -      -       -      +
    721C  SER*     2.9    25.4    +      -       -      -
    126Q  ARG*     4.1     9.1    +      -       -      +
    127Q  GLU*     5.7     0.4    -      -       -      +
    129Q  ASP      2.9    25.6    -      -       -      +
    130Q  ILE      3.7    10.3    -      -       -      +
    131Q  ASP      3.7     4.0    -      -       -      -
    132Q  GLY*     3.4    20.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 718 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    714C  GLN*     3.4    13.0    +      -       -      +
    715C  GLU*     2.7    51.8    +      -       -      +
    716C  LYS      3.2     0.2    -      -       -      -
    717C  LYS*     1.3    73.9    -      -       -      +
    719C  LYS*     1.3    50.8    +      -       -      +
    721C  SER*     3.8     0.8    -      -       -      -
    722C  ILE*     2.6    47.1    +      -       +      +
    763C  LEU*     3.9    20.6    -      -       +      +
    766C  HIS*     4.1    22.0    +      -       -      +
    767C  GLN*     2.5    58.8    -      -       -      +
    131Q  ASP      3.4    17.2    +      -       -      +
    132Q  GLY*     3.9    19.4    +      -       -      -
    133Q  ASP      4.9     0.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 719 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    715C  GLU*     3.2    32.8    +      -       +      +
    716C  LYS*     2.5    21.5    +      -       +      +
    718C  ARG*     1.3    69.2    -      -       -      +
    720C  ILE*     1.3    56.2    +      -       -      +
    721C  SER      2.5    16.8    +      -       -      -
    722C  ILE*     2.7    16.6    +      -       +      +
    723C  PHE*     3.0    11.6    +      -       -      +
    767C  GLN*     3.4    21.3    -      -       -      +
    790C  PHE*     5.5     3.6    -      -       +      -
    793C  PHE*     3.9    18.2    -      -       +      -
    794C  GLN*     5.0    13.9    -      -       -      +
    797C  ILE*     3.3    36.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 720 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    709C  ASN*     4.4    12.6    -      -       -      +
    712C  PHE*     4.5    12.8    -      -       +      -
    716C  LYS*     2.6    37.2    +      -       +      +
    717C  LYS*     3.2    19.1    -      -       -      +
    719C  LYS*     1.3    71.4    -      -       -      +
    721C  SER*     1.3    64.3    +      -       -      +
    723C  PHE*     4.0     3.8    -      -       +      +
    724C  ARG*     2.8    51.1    +      -       -      +
    790C  PHE*     3.4    36.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 721 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    704C  TYR*     4.0    33.4    +      -       -      -
    709C  ASN*     3.7    18.4    +      -       -      -
    717C  LYS      2.9    17.7    +      -       -      -
    718C  ARG      3.8     2.0    -      -       -      -
    719C  LYS      2.5     5.9    +      -       -      -
    720C  ILE*     1.3    74.4    -      -       -      +
    722C  ILE*     1.3    65.0    +      -       -      -
    723C  PHE      2.6     6.8    +      -       -      -
    724C  ARG*     2.8     8.6    +      -       -      +
    725C  GLY*     2.7    23.4    +      -       -      -
    763C  LEU*     4.5     2.2    -      -       -      -
    130Q  ILE      4.0     4.9    +      -       -      -
    131Q  ASP*     4.0     8.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 722 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    718C  ARG*     2.6    36.9    +      -       +      +
    719C  LYS*     2.7     8.5    +      -       +      +
    721C  SER*     1.3    70.9    -      -       -      +
    723C  PHE*     1.3    55.9    +      -       -      +
    726C  ILE*     3.2    28.5    +      -       +      +
    760C  VAL*     3.5    32.1    -      -       +      +
    763C  LEU*     2.9    49.1    -      -       +      +
    764C  LEU*     3.3    22.2    -      -       +      -
    767C  GLN*     4.7     7.0    -      -       -      +
    776C  LEU*     4.5     1.8    -      -       +      -
    793C  PHE*     3.8    24.2    -      -       +      -
    797C  ILE*     6.5     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 723 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    719C  LYS      3.0    11.7    +      -       -      +
    720C  ILE*     4.0     4.9    -      -       +      +
    721C  SER      2.6     1.4    +      -       -      -
    722C  ILE*     1.3    75.7    -      -       -      +
    724C  ARG*     1.3    58.8    +      -       -      +
    725C  GLY      3.0     1.6    -      -       -      -
    726C  ILE*     2.5    43.6    +      -       +      +
    727C  GLN*     2.8    48.9    +      -       +      +
    780C  LEU*     5.2     3.8    -      -       +      -
    782C  PHE*     5.0     4.5    -      +       -      -
    786C  GLU*     4.0    29.4    -      -       +      -
    789C  ASN*     4.2    18.2    -      -       -      -
    790C  PHE*     3.8    40.6    -      +       +      -
    793C  PHE*     3.9    30.0    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 724 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    657C  ILE*     5.1     0.7    -      -       -      -
    700C  TYR*     4.1    10.0    -      -       -      +
    703C  ASP*     3.2    47.4    +      -       -      +
    704C  TYR*     4.2    18.9    +      -       +      +
    706C  ASN*     5.0    10.1    -      -       -      +
    709C  ASN*     4.1    22.2    -      -       -      +
    712C  PHE*     6.1     1.6    -      -       -      -
    720C  ILE*     2.8    44.1    +      -       -      +
    721C  SER*     2.8    15.4    +      -       -      +
    723C  PHE*     1.3    75.9    -      -       -      +
    725C  GLY*     1.3    62.0    +      -       -      +
    727C  GLN*     3.3    29.9    +      -       -      +
    728C  ALA*     3.3    10.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 725 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    657C  ILE*     3.5    26.7    -      -       -      -
    704C  TYR*     4.2     3.7    -      -       -      -
    721C  SER      2.7    16.8    +      -       -      -
    722C  ILE      4.3     0.9    -      -       -      -
    724C  ARG*     1.3    75.6    -      -       -      +
    726C  ILE*     1.3    55.5    +      -       -      -
    728C  ALA*     2.8    26.5    +      -       -      +
    729C  TYR      3.0     5.0    +      -       -      -
    756C  ILE*     3.6    13.3    -      -       -      +
    760C  VAL*     4.8     5.8    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 726 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    722C  ILE*     3.2    24.7    +      -       +      +
    723C  PHE*     2.5    44.0    +      -       +      +
    725C  GLY*     1.3    70.7    -      -       -      +
    727C  GLN*     1.3    67.8    +      -       +      +
    729C  TYR*     3.1     8.7    +      -       -      +
    730C  ASN*     2.9    21.0    +      -       -      +
    756C  ILE*     5.0     1.3    -      -       -      -
    760C  VAL*     4.5     3.5    -      -       +      +
    773C  PHE*     4.0    27.1    -      -       +      -
    776C  LEU*     3.9    36.3    -      -       +      -
    777C  TYR*     4.6    16.8    -      -       +      -
    780C  LEU*     5.1     3.1    -      -       +      -
    782C  PHE*     4.3    13.7    -      -       +      -
    793C  PHE*     5.2     1.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 727 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    700C  TYR*     3.3    41.3    -      -       +      -
    723C  PHE*     2.8    52.8    +      -       +      +
    724C  ARG*     3.4    31.7    -      -       -      +
    726C  ILE*     1.3    76.1    -      -       +      +
    728C  ALA*     1.3    63.7    -      -       -      +
    730C  ASN*     3.0    23.2    -      -       -      +
    731C  GLU      3.3     4.2    +      -       -      -
    782C  PHE*     5.2     4.0    -      -       +      -
    786C  GLU*     3.4    19.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 728 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    657C  ILE*     4.3    13.5    -      -       +      -
    697C  ILE*     4.8     8.3    -      -       +      -
    700C  TYR*     3.3    24.6    -      -       +      -
    701C  LEU*     4.3    11.4    -      -       +      +
    724C  ARG      3.3     3.1    +      -       -      +
    725C  GLY*     2.8    19.7    +      -       -      +
    727C  GLN*     1.3    78.3    -      -       -      +
    729C  TYR*     1.3    63.8    +      -       -      +
    730C  ASN      3.0     0.9    +      -       -      -
    731C  GLU*     3.3     2.8    +      -       -      +
    732C  ILE*     2.8    29.1    +      -       +      +
    756C  ILE*     4.8     4.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 729 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    725C  GLY      3.0     6.2    +      -       -      +
    726C  ILE*     3.3    12.3    -      -       +      +
    728C  ALA*     1.3    75.6    -      -       -      +
    730C  ASN*     1.3    69.9    +      -       -      +
    732C  ILE*     3.3     9.7    +      -       -      +
    733C  GLU*     3.0    43.5    +      -       +      -
    753C  LYS*     3.3    37.5    +      -       +      -
    756C  ILE*     3.8    26.5    -      -       +      +
    757C  THR*     3.4    15.7    -      -       -      -
    773C  PHE*     3.2    39.3    -      +       +      -
    777C  TYR*     3.6    25.2    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 730 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    696C  LYS*     5.2     2.1    +      -       -      -
    700C  TYR*     6.1     0.4    -      -       -      -
    726C  ILE      2.9    11.7    +      -       -      +
    727C  GLN*     3.0    15.7    -      -       -      +
    728C  ALA      3.0     0.6    +      -       -      -
    729C  TYR*     1.3    83.2    -      -       -      +
    731C  GLU*     1.3    75.2    +      -       -      +
    732C  ILE      2.7     0.7    +      -       -      -
    733C  GLU*     2.6    27.9    +      -       -      +
    734C  ASN*     3.0    15.6    +      -       -      +
    777C  TYR*     3.7    18.2    +      -       +      +
    782C  PHE*     3.0    51.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 731 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    693C  SER*     2.4    30.4    +      -       -      -
    696C  LYS*     2.8    54.3    +      -       +      +
    697C  ILE*     3.9    20.0    -      -       +      -
    700C  TYR*     4.2     9.9    -      -       +      -
    727C  GLN      3.3     2.8    +      -       -      +
    728C  ALA      3.3     5.1    +      -       -      +
    730C  ASN*     1.3    85.7    +      -       -      +
    732C  ILE*     1.3    66.7    +      -       -      +
    734C  ASN*     3.3    24.2    +      -       -      +
    735C  VAL*     3.1    16.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 732 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    697C  ILE*     3.0    51.6    -      -       +      -
    728C  ALA*     2.8    27.1    +      -       +      +
    729C  TYR*     3.3     9.9    -      -       -      +
    730C  ASN      2.7     3.8    +      -       -      -
    731C  GLU*     1.3    76.2    -      -       -      +
    733C  GLU*     1.3    66.4    +      -       -      +
    734C  ASN      2.8     0.5    +      -       -      -
    735C  VAL*     2.9    11.7    +      -       -      +
    736C  LEU*     3.0    13.1    +      -       +      -
    749C  PHE*     3.6    41.0    -      -       +      +
    752C  LEU*     4.4    20.4    -      -       +      -
    753C  LYS*     4.3    14.1    -      -       +      +
    756C  ILE*     5.4     7.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 733 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    729C  TYR*     3.0    31.3    +      -       +      +
    730C  ASN      2.6    18.2    +      -       -      +
    732C  ILE*     1.3    74.5    -      -       -      +
    734C  ASN*     1.3    65.0    +      -       -      +
    736C  LEU*     3.4     9.0    +      -       -      +
    737C  LYS*     3.2    32.3    +      -       +      +
    753C  LYS*     3.2    33.1    +      -       -      +
    777C  TYR*     4.1    18.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 734 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    693C  SER*     5.0     1.0    +      -       -      -
    730C  ASN*     3.0    16.8    +      -       -      +
    731C  GLU*     3.1    38.7    +      -       -      +
    732C  ILE      2.8     2.8    +      -       -      -
    733C  GLU*     1.3    72.0    -      -       -      +
    735C  VAL*     1.3    55.1    +      -       +      +
    737C  LYS*     2.6    40.9    +      -       -      +
    738C  SER*     4.1     0.8    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 735 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678C  VAL*     5.6     2.2    -      -       +      -
    690C  LYS*     4.3    18.8    -      -       +      +
    693C  SER*     3.1    29.4    -      -       -      +
    694C  VAL*     5.1     4.0    -      -       +      +
    697C  ILE*     4.6    11.4    -      -       +      -
    731C  GLU      3.1    16.8    -      -       -      +
    732C  ILE*     2.9     6.6    +      -       -      +
    734C  ASN*     1.3    71.7    -      -       -      +
    736C  LEU*     1.3    53.1    +      -       -      +
    737C  LYS      2.6     0.7    +      -       -      -
    738C  SER*     2.6    41.5    +      -       -      -
    741C  ILE*     3.1    30.2    -      -       +      +
    749C  PHE*     4.9    18.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 736 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    732C  ILE*     3.0    10.1    +      -       +      +
    733C  GLU*     3.6    12.8    -      -       -      +
    735C  VAL*     1.3    76.2    -      -       -      +
    737C  LYS*     1.3    69.6    +      -       +      +
    738C  SER      3.4     2.1    +      -       -      -
    741C  ILE*     4.7     7.4    -      -       +      -
    746C  LYS*     3.6    42.2    -      -       +      +
    749C  PHE*     4.3    15.6    -      -       +      -
    750C  GLN*     2.9    37.9    -      -       +      +
    753C  LYS*     4.0    26.5    -      -       +      +
----------------------------------------------------------
 Back to top of page


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