Contacts of the helix formed by residues 695 - 718 (chain B) in PDB entry 1OFD


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASP 695 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677B  TRP*     3.4    13.6    +      -       +      +
    693B  ARG      4.1     2.2    +      -       -      -
    694B  ILE*     1.3    78.0    -      -       -      +
    696B  LEU*     1.3    64.2    +      -       -      +
    697B  PRO*     3.4    16.9    -      -       +      +
    698B  THR*     2.8    35.3    +      -       -      -
    699B  ALA      3.2    15.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 696 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433B  GLU*     3.6    44.0    -      -       +      +
    673B  VAL      4.6     0.9    -      -       -      +
    674B  ARG*     4.0    23.6    -      -       +      +
    677B  TRP*     3.4    57.5    -      -       +      +
    678B  LEU*     5.0     6.7    -      -       +      -
    695B  ASP*     1.3    71.7    -      -       -      +
    697B  PRO*     1.3    72.4    -      -       +      +
    699B  ALA*     3.1    13.8    +      -       +      +
    700B  LEU*     3.1    29.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 697 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431B  PHE*     4.5    10.3    -      -       +      +
    433B  GLU*     3.6    28.7    -      -       +      +
    695B  ASP*     3.4    19.3    -      -       +      +
    696B  LEU*     1.3    95.1    -      -       +      +
    698B  THR*     1.3    55.7    +      -       -      +
    700B  LEU*     3.5     9.2    +      -       +      +
    701B  LYS*     3.0    30.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 698 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    693B  ARG      4.4     7.2    +      -       -      +
    694B  ILE*     4.2    14.4    -      -       +      -
    695B  ASP*     2.8    34.5    +      -       -      -
    697B  PRO*     1.3    73.0    -      -       -      +
    699B  ALA*     1.3    56.7    +      -       -      +
    701B  LYS*     3.7    20.0    +      -       -      +
    702B  ASN*     2.8    57.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 699 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    465B  ALA*     3.5    26.1    -      -       -      +
    673B  VAL*     4.0    16.8    -      -       +      -
    676B  TRP*     4.1    13.7    -      -       +      -
    677B  TRP*     4.4     7.0    -      -       +      -
    694B  ILE*     3.9    12.3    -      -       +      +
    695B  ASP      3.2    11.1    +      -       -      +
    696B  LEU*     3.1    11.7    +      -       +      +
    698B  THR*     1.3    77.0    -      -       -      +
    700B  LEU*     1.3    56.1    +      -       -      +
    702B  ASN*     3.4     1.2    +      -       -      +
    703B  TYR*     3.0    23.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 700 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431B  PHE*     3.7    48.9    -      -       +      -
    432B  ALA      4.0    13.9    -      -       -      +
    433B  GLU*     5.0     1.8    -      -       +      -
    670B  LEU*     3.6    43.5    -      -       +      +
    673B  VAL*     3.8    18.2    -      -       +      -
    674B  ARG*     4.3     8.3    -      -       +      +
    696B  LEU*     3.1    36.0    +      -       +      +
    697B  PRO*     4.0     2.9    -      -       +      +
    699B  ALA*     1.3    75.2    -      -       -      +
    701B  LYS*     1.3    58.2    +      -       -      +
    703B  TYR*     3.1     7.4    +      -       -      +
    704B  ARG*     3.0    23.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 701 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    429B  ASP      5.8     2.0    -      -       -      +
    431B  PHE*     3.7    17.5    -      -       +      -
    697B  PRO      3.0    17.5    +      -       -      +
    698B  THR*     3.7    24.6    +      -       -      +
    700B  LEU*     1.3    74.0    -      -       -      +
    702B  ASN*     1.3    65.2    +      -       -      +
    704B  ARG*     3.3     6.2    +      -       -      +
    705B  GLN*     2.9    46.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 702 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464B  MET      3.3     8.5    -      -       -      +
    465B  ALA      3.0    30.2    +      -       -      +
    466B  SER      3.6    15.0    +      -       -      -
    467B  GLN      4.3     1.6    -      -       -      -
    468B  GLY*     3.7    15.3    -      -       -      +
    694B  ILE*     3.9    11.7    -      -       -      +
    698B  THR*     2.8    33.1    +      -       -      +
    699B  ALA      3.6     0.4    -      -       -      +
    701B  LYS*     1.3    77.3    +      -       -      +
    703B  TYR*     1.3    56.1    +      -       -      +
    705B  GLN*     3.3    15.3    +      -       -      +
    706B  SER*     2.9    32.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 703 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    461B  VAL*     4.4    13.0    -      -       +      -
    464B  MET*     3.7    37.2    +      -       +      -
    465B  ALA*     4.3     2.2    -      -       +      -
    545B  LEU*     4.3     8.3    -      -       +      -
    648B  TRP*     2.6    42.1    +      -       -      -
    653B  PHE*     3.6    10.2    -      +       -      -
    666B  PRO*     4.5     0.9    -      -       +      -
    669B  ALA*     3.3    20.4    -      -       +      +
    670B  LEU*     3.9    24.9    -      -       +      -
    673B  VAL*     4.1    23.3    -      -       +      -
    699B  ALA      3.0    14.0    +      -       -      +
    700B  LEU*     3.1    10.0    +      -       -      +
    702B  ASN*     1.3    78.0    -      -       -      +
    704B  ARG*     1.3    66.3    +      -       -      +
    706B  SER*     3.2     5.2    +      -       -      -
    707B  VAL*     3.1    34.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 704 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    428B  SER      3.2    23.4    +      -       -      -
    429B  ASP*     5.0     1.4    -      -       -      +
    431B  PHE*     3.6    26.0    -      -       +      -
    542B  ARG*     4.4     9.1    -      -       -      +
    543B  SER*     4.7     3.0    +      -       -      -
    545B  LEU*     3.1    42.7    +      -       +      +
    547B  ASN*     3.6    18.0    -      -       -      +
    550B  GLU*     2.3    38.4    +      -       -      -
    700B  LEU      3.0    11.8    +      -       -      +
    701B  LYS*     3.7    10.3    -      -       -      +
    703B  TYR*     1.3    77.4    -      -       +      +
    705B  GLN*     1.3    58.6    +      -       -      +
    707B  VAL*     3.2     3.3    +      -       -      +
    708B  GLU*     2.9    53.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 705 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    467B  GLN      5.2     0.6    +      -       -      -
    468B  GLY*     3.3    26.3    +      -       -      +
    469B  LYS*     5.7     0.4    -      -       -      +
    701B  LYS*     2.9    32.1    +      -       +      +
    702B  ASN*     3.4    17.0    +      -       -      +
    704B  ARG*     1.3    77.4    -      -       -      +
    706B  SER*     1.3    55.7    +      -       -      +
    708B  GLU*     3.3    11.4    +      -       -      +
    709B  ALA*     2.9    33.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 706 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464B  MET*     3.1    37.4    +      -       -      -
    468B  GLY      2.9    31.8    -      -       -      -
    469B  LYS*     3.0     5.2    +      -       -      +
    470B  GLU*     4.1    13.5    +      -       -      +
    650B  THR*     3.9     4.1    +      -       -      -
    702B  ASN      2.9     7.3    +      -       -      -
    703B  TYR      3.2     9.4    +      -       -      -
    705B  GLN*     1.3    76.0    -      -       -      +
    707B  VAL*     1.3    58.7    +      -       -      +
    709B  ALA*     4.0     3.7    -      -       -      +
    710B  GLY*     3.0    25.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 707 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464B  MET*     5.0     4.5    -      -       -      -
    544B  PRO*     6.0     0.4    -      -       +      -
    545B  LEU*     3.8    18.2    -      -       +      -
    648B  TRP      4.6     2.7    -      -       -      +
    650B  THR*     4.3    11.3    +      -       -      +
    653B  PHE*     3.6    48.9    -      -       +      -
    703B  TYR*     3.1    34.7    +      -       +      +
    704B  ARG      3.2     6.9    +      -       -      +
    706B  SER*     1.3    75.8    -      -       -      +
    708B  GLU*     1.3    60.0    +      -       +      +
    710B  GLY*     3.2     1.4    +      -       -      -
    711B  LEU*     2.9    40.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 708 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    518B  LEU*     3.6    27.9    -      -       +      +
    543B  SER*     2.6    35.0    +      -       -      +
    544B  PRO*     5.3     1.3    -      -       +      -
    545B  LEU*     5.6     1.3    -      -       +      -
    704B  ARG*     2.9    43.2    +      -       +      +
    705B  GLN*     3.7     9.5    -      -       -      +
    707B  VAL*     1.3    79.5    -      -       +      +
    709B  ALA*     1.3    62.7    +      -       -      +
    711B  LEU*     3.3     2.9    +      -       +      -
    712B  PHE*     3.1    32.8    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 709 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    468B  GLY      5.6     2.7    -      -       -      +
    469B  LYS*     6.4     1.1    -      -       -      -
    470B  GLU*     4.9     0.4    -      -       -      -
    509B  PRO*     5.3     0.9    -      -       -      +
    510B  LEU*     6.1     4.9    -      -       +      -
    705B  GLN*     2.9    19.5    +      -       +      +
    706B  SER*     4.0     5.4    -      -       -      +
    708B  GLU*     1.3    75.8    -      -       -      +
    710B  GLY*     1.3    57.5    +      -       -      +
    712B  PHE*     3.4    13.2    +      -       -      +
    713B  LYS*     3.0    27.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 710 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    470B  GLU*     3.4    18.3    +      -       -      -
    650B  THR*     3.4    27.8    -      -       -      +
    706B  SER      3.0    11.4    +      -       -      -
    707B  VAL      3.6     0.4    -      -       -      -
    708B  GLU      3.2     0.2    -      -       -      -
    709B  ALA*     1.3    75.6    -      -       -      +
    711B  LEU*     1.3    59.3    +      -       -      +
    713B  LYS*     3.5     2.8    +      -       -      +
    714B  ILE*     3.0    33.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 711 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    518B  LEU*     4.2    19.3    -      -       +      -
    544B  PRO*     3.5    31.2    -      -       +      -
    650B  THR      4.2     5.4    -      -       -      +
    653B  PHE*     4.1    11.9    -      -       +      +
    654B  ALA*     3.7    40.4    -      -       +      +
    657B  VAL*     5.6     1.3    -      -       +      -
    707B  VAL*     2.9    31.5    +      -       +      +
    708B  GLU*     3.3     5.8    +      -       +      +
    710B  GLY*     1.3    74.6    -      -       -      +
    712B  PHE*     1.3    66.3    +      -       -      +
    713B  LYS      3.2     0.2    -      -       -      -
    714B  ILE*     3.3     1.5    +      -       -      +
    715B  LEU*     2.9    36.7    +      -       +      +
    723B  LEU*     4.7    14.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 712 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    509B  PRO*     3.7    16.2    -      -       +      +
    513B  ASN*     3.4    31.9    -      -       -      +
    516B  MET*     3.6    35.7    -      -       +      +
    517B  SER*     3.9     9.4    -      -       -      -
    518B  LEU*     3.6    41.5    -      -       +      -
    708B  GLU*     3.1    27.1    +      -       +      -
    709B  ALA*     3.5    11.7    -      -       -      +
    711B  LEU*     1.3    74.6    -      -       -      +
    713B  LYS*     1.3    63.0    +      -       -      +
    715B  LEU*     3.9     5.9    -      -       +      +
    716B  SER*     2.9    25.6    +      -       -      -
    721B  SER      5.2     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 713 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    470B  GLU*     3.3    27.8    -      -       -      +
    509B  PRO*     4.0    15.0    -      -       +      +
    650B  THR*     6.1     0.2    -      -       +      -
    709B  ALA      3.0    15.0    +      -       -      +
    710B  GLY      3.5     8.1    -      -       -      +
    711B  LEU      3.2     0.2    -      -       -      -
    712B  PHE*     1.3    77.0    -      -       -      +
    714B  ILE*     1.3    63.9    -      -       +      +
    716B  SER*     2.7    23.7    +      -       -      +
    717B  LYS*     3.1    25.2    +      -       -      +
    975B  GLU*     3.0    41.5    +      -       +      +
    978B  GLN*     5.9     0.2    -      -       -      +
   1069B  PRO*     3.7    19.5    -      -       +      +
   1071B  SER*     4.9     1.8    -      -       -      +
   1072B  SER*     4.4     2.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 714 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    497B  GLN*     3.5    42.4    -      -       +      +
    498B  ARG      5.3     1.7    -      -       -      +
    650B  THR*     3.3    36.6    -      -       +      +
    651B  HIS      4.0     0.2    -      -       -      +
    654B  ALA*     3.7    20.6    -      -       +      -
    710B  GLY      3.0    13.3    +      -       -      +
    711B  LEU*     3.3     6.0    +      -       -      +
    713B  LYS*     1.3    77.1    -      -       +      +
    715B  LEU*     1.3    64.7    +      -       +      +
    717B  LYS*     3.2    29.2    +      -       -      +
    718B  MET*     4.0     3.1    +      -       -      +
    726B  TYR*     3.4    31.7    -      -       +      +
    731B  ILE*     6.1     0.5    -      -       -      +
   1071B  SER*     5.9     0.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 715 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    516B  MET*     5.8     0.9    -      -       -      -
    518B  LEU*     4.9     4.7    -      -       +      -
    711B  LEU*     2.9    28.8    +      -       +      +
    712B  PHE*     3.9     6.7    -      -       +      +
    714B  ILE*     1.3    77.9    -      -       +      +
    716B  SER*     1.3    60.9    +      -       -      +
    718B  MET*     3.2     9.4    +      -       -      +
    720B  ILE*     3.0    44.1    +      -       +      +
    721B  SER      4.4     4.5    -      -       -      +
    722B  LEU      3.6    11.9    -      -       -      +
    723B  LEU*     3.5    44.6    -      -       +      +
    726B  TYR*     3.4    48.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 716 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    506B  PRO*     3.2     3.9    -      -       -      +
    507B  ILE*     3.0    54.7    +      -       -      -
    509B  PRO*     3.4    25.0    -      -       -      +
    516B  MET*     4.6     2.2    -      -       -      -
    712B  PHE      2.9    16.7    +      -       -      -
    713B  LYS*     2.7    19.9    +      -       -      +
    715B  LEU*     1.3    73.1    -      -       -      +
    717B  LYS*     1.3    60.4    +      -       -      +
    719B  GLY      2.9    14.8    +      -       -      +
    720B  ILE      4.0     1.3    +      -       -      -
    974B  GLY      4.8     2.0    +      -       -      -
    975B  GLU*     6.1     0.7    -      -       -      +
   1004B  PRO*     5.4     0.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 717 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    497B  GLN*     2.6    36.0    +      -       +      +
    498B  ARG      4.5     4.0    -      -       -      +
    499B  PHE*     3.6    10.1    -      -       +      +
    500B  ALA*     2.8    25.7    +      -       -      +
    506B  PRO*     3.7     6.6    -      -       -      +
    713B  LYS*     3.1    22.5    +      -       -      +
    714B  ILE*     3.3    22.0    -      -       -      +
    715B  LEU      3.2     0.2    -      -       -      -
    716B  SER*     1.3    78.3    +      -       -      +
    718B  MET*     1.3    56.1    +      -       -      +
    974B  GLY*     3.3    40.0    -      -       -      +
    975B  GLU*     3.7    17.2    +      -       +      -
   1071B  SER*     5.0     1.8    +      -       -      -
   1072B  SER*     3.2    24.4    +      -       -      +
   1076B  ALA*     3.8    15.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 718 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231B  ASN*     2.9    35.6    +      -       +      +
    498B  ARG*     3.5    36.1    -      -       +      +
    499B  PHE      3.4    34.3    -      -       -      +
    500B  ALA*     3.8    18.2    -      -       -      +
    504B  ASN*     3.0    23.1    +      -       -      +
    714B  ILE      4.0     2.2    +      -       -      +
    715B  LEU      3.2     4.4    +      -       -      +
    716B  SER      3.2     0.4    -      -       -      -
    717B  LYS*     1.3    76.6    -      -       -      +
    719B  GLY*     1.3    57.9    +      -       -      +
    720B  ILE*     3.7    29.6    -      -       +      -
    726B  TYR*     6.0     0.4    -      -       +      -
    731B  ILE*     3.8    18.4    -      -       +      -
----------------------------------------------------------
 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