Contacts of the helix formed by residues 78 - 100 (chain B) in PDB entry 2POD


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 GLY 78 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73A  GLY*     3.6    13.1    -      -       -      -
     78A  GLY*     5.1     5.2    -      -       -      -
     80A  GLU*     3.4    15.7    -      -       -      -
     73B  GLY      4.9     2.6    +      -       -      -
     76B  SER      3.2     8.5    +      -       -      -
     77B  ALA*     1.3    77.8    -      -       -      +
     79B  ALA*     1.3    65.6    +      -       -      -
     80B  GLU*     3.3     7.4    -      -       -      -
     81B  MSE      2.9    13.5    +      -       -      +
     82B  ARG*     3.0    16.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 79 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  SER*     4.7     2.0    -      -       -      -
     79A  ALA*     3.8    19.3    -      -       +      -
     80A  GLU*     3.0    11.3    +      -       -      +
     40B  SER*     3.5    44.6    -      -       -      +
     41B  ALA*     3.8     8.3    -      -       -      +
     44B  TYR*     4.0     2.9    -      -       +      -
     78B  GLY*     1.3    69.4    -      -       -      +
     80B  GLU*     1.3    59.9    +      -       -      +
     82B  ARG*     3.4    12.2    +      -       -      +
     83B  GLY*     2.9    28.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 80 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37A  GLY*     5.4     0.5    -      -       -      -
     40A  SER*     4.1     3.0    +      -       -      -
     78A  GLY*     3.4    10.1    -      -       -      -
     79A  ALA*     3.1    24.3    +      -       -      +
     82A  ARG*     2.7    38.7    +      -       -      -
     44B  TYR*     3.3    39.3    -      -       +      +
     72B  LEU      4.3    18.1    -      -       -      +
     73B  GLY*     4.6     6.2    -      -       -      +
     78B  GLY*     4.2     1.2    -      -       -      -
     79B  ALA*     1.3    75.9    +      -       -      +
     81B  MSE      1.3    56.1    +      -       +      +
     84B  ASN*     2.9    39.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MSE 81 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  SER*     5.3     6.1    -      -       -      +
     73B  GLY      3.7    13.6    +      -       -      +
     74B  PHE*     3.6    30.5    -      -       +      +
     76B  SER      3.3    24.0    -      -       -      +
     77B  ALA*     3.8     0.7    -      -       -      -
     78B  GLY      2.9    12.7    +      -       -      +
     80B  GLU*     1.3    79.8    -      -       +      +
     82B  ARG*     1.3    52.2    +      -       -      +
     84B  ASN*     3.6    14.0    +      -       -      +
     85B  SER*     2.5    37.5    +      -       -      -
    273B  ALA*     3.8     3.8    -      -       +      -
    274B  THR*     3.9    18.8    -      -       +      -
    296B  TRP      3.2    24.9    -      -       -      +
    298B  GLY*     3.7    26.9    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 82 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72A  LEU*     4.1    13.4    -      -       -      +
     80A  GLU*     2.7    29.7    +      -       -      -
     34B  THR*     3.4    19.7    +      -       +      +
     35B  PHE      3.4    20.0    -      -       -      -
     36B  TYR*     3.0    20.1    +      -       -      +
     37B  GLY*     3.1    29.3    +      -       -      -
     40B  SER*     3.2     9.9    +      -       -      -
     41B  ALA*     4.3     4.7    -      -       +      +
     77B  ALA      3.1    30.2    +      -       -      +
     78B  GLY      3.0     9.4    +      -       -      +
     79B  ALA*     3.7    10.4    -      -       -      +
     81B  MSE      1.3    73.9    -      -       -      +
     83B  GLY*     1.3    60.2    +      -       -      +
     85B  SER*     3.4     1.0    +      -       -      -
     86B  ALA*     3.0    29.3    +      -       -      +
    295B  SER      3.4    16.4    -      -       -      +
    296B  TRP*     3.6    16.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 83 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34B  THR*     5.1     0.2    -      -       -      -
     41B  ALA*     4.2     7.9    -      -       -      +
     44B  TYR*     4.0     5.6    -      -       -      -
     45B  ILE*     4.0    22.6    -      -       -      +
     79B  ALA      2.9    17.0    +      -       -      -
     80B  GLU      3.8     1.1    -      -       -      -
     82B  ARG*     1.3    74.3    -      -       -      +
     84B  ASN*     1.3    59.3    +      -       -      +
     86B  ALA*     3.4     4.6    +      -       -      +
     87B  LEU*     3.0    37.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 84 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  TYR*     2.5    24.4    +      -       -      -
     49B  ALA*     4.5     0.3    -      -       -      +
     65B  ALA*     5.6     0.8    +      -       -      -
     68B  LEU*     2.9    51.2    +      -       +      +
     69B  SER*     4.3     4.0    -      -       -      +
     70B  GLY      5.0     0.6    -      -       -      +
     80B  GLU*     2.9    25.2    +      -       -      +
     81B  MSE      3.7    17.9    -      -       -      +
     83B  GLY*     1.3    75.5    -      -       -      +
     85B  SER*     1.3    56.7    +      -       -      +
     87B  LEU*     3.4     7.6    +      -       -      +
     88B  ASP*     2.8    29.6    +      -       -      +
    298B  GLY*     5.3     3.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 85 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81B  MSE      2.5    23.0    +      -       -      -
     82B  ARG      3.7     0.2    -      -       -      -
     83B  GLY      3.3     0.4    -      -       -      -
     84B  ASN*     1.3    73.6    -      -       -      +
     86B  ALA*     1.3    59.5    +      -       -      +
     88B  ASP*     3.2     3.3    +      -       -      +
     89B  ILE*     3.0    34.6    +      -       -      +
    294B  ILE      3.3    21.8    -      -       -      -
    295B  SER      3.4    21.1    +      -       -      -
    297B  CYS      4.0     0.3    +      -       -      -
    298B  GLY*     3.0    21.9    +      -       -      -
    299B  GLY*     3.4    11.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 86 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  VAL*     3.7    23.6    -      -       +      -
     32B  GLY*     3.3    12.4    -      -       -      -
     33B  GLU      3.5    35.3    +      -       -      +
     34B  THR*     4.0     6.5    -      -       +      +
     45B  ILE*     5.0     0.4    -      -       +      -
     82B  ARG      3.0    17.0    +      -       -      +
     83B  GLY*     3.7     4.5    -      -       -      +
     85B  SER*     1.3    72.4    -      -       -      +
     87B  LEU*     1.3    65.4    +      -       -      +
     88B  ASP      3.3     0.2    +      -       -      -
     89B  ILE*     3.3     2.8    +      -       -      -
     90B  ALA*     3.3    18.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 87 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6B  ILE*     4.3    11.7    -      -       +      -
     20B  VAL*     3.7    27.4    -      -       +      -
     22B  VAL*     4.2    12.1    -      -       +      +
     45B  ILE*     3.9    16.2    -      -       +      -
     49B  ALA*     3.7    29.8    -      -       +      -
     53B  LEU*     3.6    26.2    -      -       +      -
     68B  LEU*     4.0    16.2    -      -       +      -
     83B  GLY      3.0    22.0    +      -       -      +
     84B  ASN*     3.4     7.2    -      -       -      +
     86B  ALA*     1.3    75.5    -      -       -      +
     88B  ASP*     1.3    60.6    +      -       -      +
     90B  ALA*     3.6     6.1    +      -       -      +
     91B  LEU*     3.2    28.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 88 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  ILE*     3.7     9.7    -      -       -      +
     65B  ALA*     4.4     8.8    -      -       +      +
     68B  LEU*     6.0     0.2    -      -       -      +
     84B  ASN      2.8    18.9    +      -       -      +
     85B  SER      3.4     6.3    -      -       -      +
     86B  ALA      3.2     0.4    -      -       -      -
     87B  LEU*     1.3    74.1    -      -       -      +
     89B  ILE*     1.3    65.2    +      -       -      +
     91B  LEU*     3.1    19.7    +      -       -      +
     92B  TRP*     3.1    29.7    +      -       -      -
    298B  GLY      4.2     3.1    -      -       -      +
    299B  GLY*     3.8     8.5    -      -       -      -
    300B  LEU      2.7    26.9    +      -       -      -
    301B  SER*     2.9    34.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 89 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31B  LEU      3.5    15.5    -      -       -      +
     32B  GLY*     4.1     1.6    -      -       -      -
     33B  GLU*     3.7    23.6    -      -       +      +
     85B  SER      3.0    20.5    +      -       -      +
     86B  ALA      3.8     5.2    -      -       -      +
     88B  ASP*     1.3    75.4    -      -       -      +
     90B  ALA*     1.3    57.3    +      -       -      +
     92B  TRP*     3.1     9.4    +      -       -      +
     93B  ASP*     2.9    25.1    +      -       -      +
    103B  ILE*     4.7     0.7    -      -       -      +
    294B  ILE*     3.8    39.3    -      -       +      +
    300B  LEU*     4.6    15.7    -      -       +      +
    326B  VAL*     4.1     9.6    -      -       +      -
    327B  VAL*     4.5     7.6    -      -       +      -
    330B  ALA*     4.2     6.7    -      -       +      -
    378B  LEU*     3.9    21.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 90 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  VAL*     4.4     2.9    -      -       +      +
     22B  VAL*     3.8    18.6    -      -       +      -
     30B  GLY*     3.5    13.2    -      -       -      +
     31B  LEU      3.5    14.4    +      -       -      +
     32B  GLY      3.5    19.1    -      -       -      +
     86B  ALA      3.3     6.4    +      -       -      +
     87B  LEU*     3.7    10.1    -      -       -      +
     88B  ASP      3.3     0.2    -      -       -      -
     89B  ILE*     1.3    79.4    -      -       -      +
     91B  LEU*     1.3    56.4    +      -       -      +
     93B  ASP*     3.3     3.3    +      -       -      +
     94B  ILE*     3.0    33.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 91 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3B  ILE*     4.1    14.1    -      -       +      -
     22B  VAL*     4.5     6.7    -      -       +      -
     53B  LEU*     4.8    11.2    -      -       +      -
     58B  PRO*     3.8    42.4    -      -       +      +
     61B  ILE*     3.5    28.7    -      -       +      +
     64B  HIS*     4.1    29.6    -      -       +      -
     65B  ALA      5.8     0.2    -      -       -      +
     68B  LEU*     6.2     1.3    -      -       +      -
     87B  LEU*     3.2    16.6    +      -       +      +
     88B  ASP*     3.1    16.1    +      -       -      +
     90B  ALA*     1.3    75.6    -      -       -      +
     92B  TRP*     1.3    56.1    +      -       -      +
     94B  ILE*     3.5    11.7    +      -       +      +
     95B  PHE*     3.1    22.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 92 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61B  ILE*     3.4    26.2    -      -       +      +
     88B  ASP*     3.1    41.8    +      -       -      -
     89B  ILE      3.1     7.9    +      -       -      +
     91B  LEU*     1.3    73.0    -      -       -      +
     93B  ASP*     1.3    63.7    +      -       -      +
     95B  PHE*     3.6    39.1    -      +       -      +
     96B  GLY*     3.1    18.4    +      -       -      -
    103B  ILE*     3.6    21.4    -      -       +      +
    106B  LEU*     3.9    34.4    -      -       +      +
    107B  LEU*     4.3     9.2    -      -       +      -
    300B  LEU*     3.6    31.6    -      -       +      +
    301B  SER      3.5     8.3    -      -       -      +
    304B  ARG*     3.4    47.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  GLY*     3.5     5.0    -      -       -      -
     31B  LEU*     2.8    38.5    +      -       -      +
     89B  ILE      2.9    11.8    +      -       -      +
     90B  ALA*     3.3    10.3    +      -       -      +
     92B  TRP*     1.3    76.0    -      -       -      +
     94B  ILE*     1.3    61.2    +      -       -      +
     96B  GLY*     3.3     2.9    +      -       -      -
     97B  LYS*     3.2    47.7    +      -       -      +
    103B  ILE*     4.0     2.8    -      -       -      +
    376B  PRO      4.5     0.2    -      -       -      +
    377B  GLY*     3.5     5.3    -      -       -      -
    378B  LEU*     3.0    35.2    +      -       +      +
    379B  GLY      4.7     0.5    +      -       -      -
    380B  LEU      4.5     2.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  LEU*     3.8    28.5    -      -       +      -
     22B  VAL*     3.8    37.9    -      -       +      +
     24B  THR*     4.4     7.2    -      -       +      -
     28B  ILE*     3.6    21.1    -      -       +      +
     29B  THR      4.2     0.4    -      -       -      -
     30B  GLY      3.7    15.5    -      -       -      +
     58B  PRO*     3.8    26.7    -      -       +      -
     59B  LEU*     4.3     3.6    -      -       +      -
     90B  ALA      3.0    18.4    +      -       -      +
     91B  LEU*     3.6    11.4    -      -       +      +
     92B  TRP      3.4     0.2    -      -       -      -
     93B  ASP*     1.3    72.8    -      -       -      +
     95B  PHE*     1.3    66.4    +      -       -      +
     97B  LYS      3.1     2.8    +      -       -      -
     98B  ALA*     2.9    22.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  LEU*     4.1    37.9    -      -       +      +
     61B  ILE*     3.7    14.1    -      -       +      -
     91B  LEU      3.1    15.2    +      -       -      +
     92B  TRP*     3.6    38.4    -      +       -      +
     94B  ILE*     1.3    77.3    -      -       -      +
     96B  GLY*     1.3    61.7    +      -       -      +
     98B  ALA*     3.5     0.9    +      -       -      +
     99B  THR*     3.1    45.2    +      -       +      +
    106B  LEU*     3.7    25.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  TRP      3.1    11.3    +      -       -      -
     93B  ASP      3.7     1.8    -      -       -      -
     94B  ILE      3.2     0.4    -      -       -      -
     95B  PHE*     1.3    77.1    -      -       -      +
     97B  LYS*     1.3    56.1    +      -       -      +
     99B  THR*     4.1     0.7    -      -       -      -
    100B  GLY*     2.9     8.1    +      -       -      -
    101B  GLN      2.7    45.9    +      -       -      -
    106B  LEU*     3.5    10.9    -      -       -      +
    376B  PRO*     3.4     1.0    -      -       -      +
    377B  GLY*     3.5    15.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 97 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     28B  ILE*     3.5    28.7    -      -       +      -
     29B  THR*     2.9    25.2    +      -       -      +
     93B  ASP*     3.2    33.6    +      -       -      +
     94B  ILE      3.1     2.6    +      -       -      -
     96B  GLY*     1.3    76.1    -      -       -      +
     98B  ALA*     1.3    60.7    +      -       -      +
     99B  THR      3.5     0.3    +      -       -      -
    100B  GLY*     3.7     6.6    +      -       -      -
    376B  PRO*     3.9    25.9    -      -       +      +
    379B  GLY      6.1     0.4    -      -       -      +
    380B  LEU      4.8     3.1    +      -       -      -
    381B  GLU*     4.1    28.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1B  LEU*     4.2    23.1    -      -       +      -
     28B  ILE*     4.5     5.1    -      -       +      +
     59B  LEU*     4.4    12.1    -      -       +      -
     94B  ILE      2.9    17.1    +      -       -      +
     95B  PHE      3.5     4.2    +      -       -      +
     97B  LYS*     1.3    76.3    -      -       -      +
     99B  THR*     1.3    62.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  LEU*     5.7     3.4    -      -       +      -
     95B  PHE*     3.1    42.3    +      -       +      +
     96B  GLY      3.5     0.2    +      -       -      -
     98B  ALA*     1.3    81.4    -      -       +      +
    100B  GLY*     1.3    62.5    +      -       -      +
    101B  GLN*     3.4    35.2    +      -       -      +
    106B  LEU*     3.7     6.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 100 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  GLY      2.9     7.8    +      -       -      -
     97B  LYS      3.7     6.2    +      -       -      -
     98B  ALA      3.6     1.4    -      -       -      -
     99B  THR*     1.3    78.8    -      -       -      +
    101B  GLN*     1.3    66.4    +      -       -      +
    102B  PRO*     4.4     2.8    -      -       -      +
    376B  PRO*     3.9    21.8    -      -       -      +
----------------------------------------------------------
 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