Contacts of the helix formed by residues 463 - 486 (chain A) in PDB entry 2P8Q


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 GLU 463 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    422A  VAL*     3.2    43.3    -      -       +      +
    425A  ARG*     2.5    31.0    +      -       -      -
    462A  ALA*     1.3    75.9    -      -       -      +
    464A  PRO*     1.3    67.4    -      -       +      +
    465A  ARG*     4.6     7.9    -      -       +      +
    466A  VAL*     2.8    27.0    +      -       -      +
    467A  ALA      2.9    10.2    +      -       -      -
    516A  ARG*     4.5     0.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 464 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462A  ALA      3.6     0.4    -      -       -      -
    463A  GLU*     1.3    87.8    -      -       +      +
    465A  ARG*     1.3    56.4    +      -       -      +
    467A  ALA*     4.5     1.1    -      -       +      +
    468A  SER*     3.0    34.7    +      -       -      -
    516A  ARG*     3.7    10.1    -      -       -      +
    518A  ASP*     3.5    26.2    -      -       -      +
    521A  GLN*     3.8    33.7    -      -       +      +
    522A  ASN*     3.2    22.1    -      -       -      +
    524A  LEU*     4.3    14.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 465 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334A  ASP      5.8     0.4    +      -       -      -
    335A  GLU      4.8     5.5    +      -       -      -
    337A  ASP*     3.6    42.0    +      -       -      +
    422A  VAL*     4.1    19.2    -      -       +      +
    423A  VAL*     4.0    41.6    +      -       -      +
    426A  ASP*     3.0    39.4    +      -       -      +
    463A  GLU*     4.7     5.4    -      -       +      -
    464A  PRO*     1.3    78.3    -      -       -      +
    466A  VAL*     1.3    69.6    +      -       +      +
    468A  SER*     4.4     2.9    -      -       -      -
    469A  ASN*     3.4    20.3    +      -       -      -
    522A  ASN*     3.5    25.0    -      -       -      +
     32B  LYS*     5.7     1.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 466 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417A  MET*     5.1     3.8    -      -       +      -
    422A  VAL*     4.0    25.4    -      -       +      +
    425A  ARG*     4.0    25.6    -      -       +      +
    426A  ASP*     3.8    26.9    -      -       -      +
    429A  ALA*     4.1     1.1    -      -       +      +
    459A  GLY*     4.4     2.2    -      -       -      +
    462A  ALA*     3.8    20.0    -      -       +      -
    463A  GLU*     2.8    15.1    +      -       -      +
    465A  ARG*     1.3    77.9    -      -       +      +
    467A  ALA*     1.3    64.4    +      -       -      +
    468A  SER      3.2     1.3    -      -       -      -
    469A  ASN*     3.2     6.2    +      -       -      +
    470A  VAL*     3.1    36.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 467 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    459A  GLY      3.5    22.1    +      -       -      +
    460A  LEU*     3.7    19.1    -      -       -      +
    462A  ALA      3.8     0.7    -      -       -      +
    463A  GLU      2.9    13.5    +      -       -      +
    464A  PRO      4.2     2.2    -      -       -      +
    466A  VAL*     1.3    77.4    -      -       -      +
    468A  SER*     1.3    57.6    +      -       -      +
    470A  VAL*     3.4     4.0    -      -       -      +
    471A  CYS*     2.9    35.2    +      -       -      -
    513A  THR*     5.0     0.9    -      -       +      -
    516A  ARG*     3.8    13.9    -      -       -      +
    524A  LEU*     4.4    11.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 468 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464A  PRO      3.0    18.9    +      -       -      -
    465A  ARG*     4.6     4.3    -      -       -      -
    466A  VAL      3.2     0.2    -      -       -      -
    467A  ALA*     1.3    79.5    -      -       -      +
    469A  ASN*     1.3    63.0    +      -       -      +
    471A  CYS*     3.4     6.2    +      -       -      +
    472A  TRP*     3.3    15.4    +      -       -      +
    522A  ASN*     3.3    21.3    +      -       -      -
    524A  LEU*     4.5     8.0    -      -       -      +
    527A  SER*     3.2    20.7    +      -       -      -
     34B  LYS*     2.6    35.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 469 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426A  ASP*     2.9    37.0    +      -       -      -
    429A  ALA*     3.7    20.5    -      -       +      +
    430A  TRP*     3.9    22.6    -      -       -      +
    465A  ARG      3.4    12.6    +      -       -      -
    466A  VAL      3.2     4.1    +      -       -      +
    468A  SER*     1.3    76.2    +      -       -      +
    470A  VAL*     1.3    60.8    +      -       -      +
    472A  TRP*     3.3    11.1    +      -       +      +
    473A  ALA*     2.8    27.5    +      -       -      +
     32B  LYS*     4.9     7.6    -      -       -      +
     34B  LYS*     3.5    24.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 470 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417A  MET*     5.1     4.7    -      -       +      -
    429A  ALA*     3.9    15.3    -      -       +      -
    455A  CYS      5.6     0.2    -      -       -      +
    456A  LEU*     3.2    44.0    -      -       +      +
    459A  GLY*     4.1    14.1    -      -       -      +
    460A  LEU*     3.6    17.9    -      -       +      +
    466A  VAL*     3.1    24.8    +      -       +      +
    467A  ALA*     3.4    10.3    -      -       -      +
    469A  ASN*     1.3    74.4    -      -       -      +
    471A  CYS*     1.3    58.6    +      -       -      +
    473A  ALA*     3.1     8.1    +      -       -      +
    474A  PHE*     2.8    30.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 471 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    460A  LEU*     3.8    19.7    -      -       -      -
    467A  ALA      2.9    23.8    +      -       -      -
    468A  SER      3.5     8.7    -      -       -      +
    470A  VAL*     1.3    76.2    -      -       -      +
    472A  TRP*     1.3    63.5    +      -       -      +
    474A  PHE*     3.1    11.7    +      -       -      +
    475A  SER*     3.1     3.5    +      -       -      -
    510A  LEU*     4.2     5.6    -      -       -      -
    513A  THR*     4.4     2.0    -      -       -      -
    524A  LEU*     4.4     9.9    -      -       -      -
    527A  SER*     3.8    20.0    -      -       -      +
    528A  ALA*     3.8    30.3    -      -       -      -
    531A  SER*     3.0    25.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 472 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    430A  TRP*     3.4    39.5    -      +       -      -
    433A  GLY*     3.5    29.6    -      -       -      -
    434A  ARG*     3.8    11.4    -      -       +      -
    437A  GLU*     3.5    34.6    +      -       +      -
    468A  SER      3.3     2.9    +      -       -      +
    469A  ASN*     3.3     9.8    +      -       -      +
    471A  CYS*     1.3    78.9    -      -       -      +
    473A  ALA*     1.3    62.1    +      -       -      +
    475A  SER*     2.8    25.9    +      -       -      -
    476A  SER*     3.1    25.4    +      -       -      -
    527A  SER*     5.4     1.5    -      -       -      -
     33B  SER      4.0     9.4    -      -       -      -
     34B  LYS*     3.3    52.2    -      -       +      -
     35B  TYR*     3.5    30.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 473 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    429A  ALA      4.2     3.4    -      -       -      +
    432A  VAL*     4.6     3.1    -      -       +      +
    433A  GLY*     3.6    32.8    -      -       -      +
    436A  CYS*     4.2     3.8    -      -       -      +
    456A  LEU*     4.0    24.0    -      -       +      -
    469A  ASN      2.8    14.2    +      -       -      +
    470A  VAL*     3.4     8.7    -      -       -      +
    472A  TRP*     1.3    76.9    -      -       -      +
    474A  PHE*     1.3    57.6    +      -       -      +
    476A  SER*     3.1     5.1    +      -       -      -
    477A  LEU*     2.8    30.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 474 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453A  LEU*     4.1    18.8    -      -       +      -
    456A  LEU*     3.4    49.6    -      -       +      +
    457A  ILE*     3.4    31.4    -      -       +      -
    460A  LEU*     4.1    17.5    -      -       +      -
    470A  VAL*     2.8    20.5    +      -       +      +
    471A  CYS*     3.4     9.2    -      -       -      +
    473A  ALA*     1.3    76.5    -      -       -      +
    475A  SER*     1.3    57.6    +      -       -      +
    477A  LEU*     3.2    10.7    +      -       +      +
    478A  ALA*     2.8    30.0    +      -       -      +
    499A  LEU*     5.2     3.1    -      -       +      +
    506A  ILE*     3.8    35.7    -      -       +      -
    510A  LEU*     5.4     2.7    -      -       +      -
    531A  SER*     3.9     8.3    -      -       -      +
    535A  ILE*     5.6     2.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 475 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    471A  CYS      3.1     3.1    +      -       -      -
    472A  TRP*     2.8    31.4    +      -       -      -
    474A  PHE*     1.3    78.4    -      -       -      +
    476A  SER*     1.3    61.4    +      -       -      +
    478A  ALA*     3.3     8.1    +      -       -      +
    479A  GLU*     3.0    31.6    +      -       -      +
    530A  GLU*     5.3     4.3    -      -       -      +
    531A  SER*     3.8    21.9    +      -       -      -
    534A  GLU*     3.8    28.8    -      -       -      +
    535A  ILE*     5.3     1.1    -      -       -      +
     35B  TYR      5.6     0.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 476 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433A  GLY      3.8    12.1    +      -       -      -
    436A  CYS*     3.7    20.4    -      -       -      +
    437A  GLU*     4.0    14.6    -      -       -      +
    472A  TRP*     3.1    29.3    +      -       -      -
    473A  ALA      3.1     7.8    +      -       -      -
    475A  SER*     1.3    78.4    +      -       -      +
    477A  LEU*     1.3    65.1    +      -       -      +
    479A  GLU*     3.2    12.4    +      -       -      +
    480A  ALA*     3.1    23.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 477 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436A  CYS*     3.6    26.2    -      -       +      +
    440A  PRO*     6.4     0.9    -      -       +      -
    443A  ALA*     4.0    17.0    -      -       +      -
    444A  ILE*     4.7    11.8    -      -       +      +
    449A  LEU*     4.3    14.6    -      -       +      -
    452A  LEU*     4.5     6.3    -      -       +      -
    453A  LEU*     3.6    31.0    -      -       +      -
    456A  LEU*     4.1    17.5    -      -       +      -
    473A  ALA      2.8    13.9    +      -       -      +
    474A  PHE*     3.2    14.6    +      -       +      +
    476A  SER*     1.3    75.9    -      -       -      +
    478A  ALA*     1.3    56.9    +      -       -      +
    480A  ALA*     3.4     4.6    +      -       +      +
    481A  ALA*     2.9    30.9    +      -       +      +
    499A  LEU*     4.3    11.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 478 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474A  PHE*     2.8    16.6    +      -       +      +
    475A  SER*     3.5     9.2    -      -       -      +
    476A  SER      3.2     0.2    -      -       -      -
    477A  LEU*     1.3    75.1    -      -       -      +
    479A  GLU*     1.3    65.1    +      -       -      +
    481A  ALA*     3.5     1.9    +      -       -      +
    482A  TYR*     2.9    24.9    +      -       -      +
    497A  TYR*     4.2     0.7    -      -       -      -
    499A  LEU*     3.7    14.5    -      -       +      +
    534A  GLU      4.9     0.2    -      -       -      +
    535A  ILE*     3.1    42.6    -      -       +      -
    538A  ASN*     3.8     7.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 479 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    475A  SER*     3.0    22.8    +      -       -      +
    476A  SER*     3.2    10.1    +      -       -      +
    478A  ALA*     1.3    74.7    -      -       -      +
    480A  ALA*     1.3    58.8    +      -       -      +
    482A  TYR*     3.3     3.6    +      -       -      +
    483A  GLU*     2.9    44.6    +      -       +      +
    534A  GLU*     3.2    26.4    -      -       +      +
    538A  ASN*     3.5    29.6    -      -       -      +
     35B  TYR*     5.2    11.9    -      -       -      -
     46B  ARG*     6.0     0.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 480 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436A  CYS      4.3     3.8    -      -       -      +
    440A  PRO*     3.3    37.7    -      -       +      -
    444A  ILE*     3.4    10.7    -      -       +      +
    476A  SER      3.1    13.1    +      -       -      +
    477A  LEU*     3.7     5.6    -      -       +      +
    479A  GLU*     1.3    75.5    -      -       -      +
    481A  ALA*     1.3    67.1    +      -       -      +
    483A  GLU*     3.1    10.6    +      -       -      +
    484A  ALA*     2.8    25.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 481 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444A  ILE*     3.4    12.6    -      -       +      +
    477A  LEU*     2.9    19.0    +      -       +      +
    478A  ALA      3.8     2.5    -      -       -      +
    480A  ALA*     1.3    74.8    -      -       -      +
    482A  TYR*     1.3    63.5    +      -       -      +
    484A  ALA*     3.4     3.2    +      -       -      +
    485A  ALA*     3.1    24.3    +      -       -      +
    497A  TYR*     3.7    16.7    -      -       +      +
    498A  CYS*     3.5    29.5    -      -       -      -
    499A  LEU*     3.9    12.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 482 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    478A  ALA      2.9    18.7    +      -       -      +
    479A  GLU      3.4     4.3    -      -       -      +
    481A  ALA*     1.3    76.2    -      -       -      +
    483A  GLU*     1.3    68.3    +      -       +      +
    485A  ALA*     3.2    13.3    +      -       -      +
    486A  ASP*     2.9    32.6    +      -       -      +
    492A  GLU      5.3     0.2    +      -       -      -
    493A  GLU*     3.8    14.4    +      -       -      +
    494A  PRO*     3.4    33.3    -      -       +      +
    497A  TYR*     3.6    10.0    -      +       -      -
    537A  LYS      4.7     2.9    -      -       -      -
    538A  ASN*     3.6    26.9    -      -       +      +
    539A  SER      3.3    42.2    -      -       -      -
    540A  ALA      4.6     0.2    -      -       -      -
    594A  LYS*     4.3     5.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 483 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    479A  GLU*     2.9    36.6    +      -       -      +
    480A  ALA*     3.6     6.4    +      -       -      +
    482A  TYR*     1.3    77.3    -      -       +      +
    484A  ALA*     1.3    66.1    +      -       -      +
    486A  ASP*     2.9    20.6    +      -       -      +
    487A  VAL*     3.1    22.2    +      -       +      +
    538A  ASN*     5.8     1.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 484 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444A  ILE*     4.3    18.4    -      -       +      -
    480A  ALA      2.8    19.5    +      -       -      +
    481A  ALA*     3.5     8.7    -      -       -      +
    483A  GLU*     1.3    72.5    -      -       -      +
    485A  ALA*     1.3    62.8    -      -       -      +
    486A  ASP      3.4     0.3    +      -       -      -
    487A  VAL*     3.6    19.0    -      -       -      +
    498A  CYS*     6.3     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 485 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    481A  ALA      3.1    12.8    +      -       -      +
    482A  TYR      3.6     8.7    -      -       -      +
    483A  GLU      3.2     0.2    -      -       -      -
    484A  ALA*     1.3    78.5    -      -       -      +
    486A  ASP*     1.3    58.4    +      -       -      +
    487A  VAL      3.7     0.4    -      -       -      -
    489A  ASP      3.9    15.4    +      -       -      -
    490A  ASP      4.7     3.1    +      -       -      -
    494A  PRO*     4.1    12.8    -      -       +      +
    496A  THR      3.9     9.9    -      -       -      +
    497A  TYR*     3.7    24.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 486 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    482A  TYR*     2.9    41.1    +      -       -      +
    483A  GLU*     2.9    14.8    +      -       -      +
    485A  ALA*     1.3    79.7    -      -       -      +
    487A  VAL*     1.3    64.1    +      -       -      +
    488A  ALA*     3.8     5.4    -      -       -      +
    489A  ASP      4.7     0.4    -      -       -      +
    490A  ASP      5.3     8.5    -      -       -      +
    492A  GLU      5.2     4.3    -      -       -      +
    493A  GLU*     5.3     0.7    -      -       -      -
    494A  PRO*     3.8    27.4    -      -       +      +
----------------------------------------------------------
 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