Contacts of the helix formed by residues 74 - 102 (chain 3) in PDB entry 3KMB


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 ILE 74 (chain 3).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     741  ILE*     3.6    27.6    -      -       +      -
     751  GLU*     3.9    21.5    -      -       +      +
     781  LEU*     3.9    26.6    -      -       +      +
     742  ILE*     4.3    26.9    -      -       +      -
     733  ALA*     1.3    77.9    -      -       +      +
     753  GLU*     1.3    68.3    +      -       -      +
     773  LYS*     3.4     5.4    +      -       -      +
     783  LEU*     2.9    28.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 75 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     742  ILE*     3.8    26.9    -      -       +      +
     733  ALA      3.0     5.0    +      -       -      -
     743  ILE*     1.3    82.5    +      -       -      +
     763  VAL*     1.3    63.3    +      -       +      +
     783  LEU*     3.4     6.4    +      -       -      +
     793  ALA*     2.9    31.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 76 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     733  ALA*     2.7    26.9    +      -       -      +
     753  GLU*     1.3    71.4    -      -       +      +
     773  LYS*     1.3    66.1    +      -       +      +
     793  ALA*     3.3     5.9    +      -       -      +
     803  ASN*     3.0    24.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 77 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     781  LEU*     4.6    23.6    -      -       +      -
     821  GLU*     5.0    12.0    -      -       +      +
     733  ALA*     2.7    43.6    +      -       -      +
     743  ILE*     3.7     7.4    -      -       -      +
     763  VAL*     1.3    74.6    -      -       +      +
     783  LEU*     1.3    57.8    +      -       -      +
     803  ASN*     3.4     7.3    +      -       -      +
     813  MET*     3.0    35.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 78 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     781  LEU*     3.6    25.1    -      -       +      +
     742  ILE*     3.9    49.6    -      -       +      +
     772  LYS*     4.2    20.2    -      -       +      -
     782  LEU*     3.8    17.0    -      -       +      +
     812  MET*     3.5    33.5    -      -       -      +
     743  ILE*     2.9    18.0    +      -       +      +
     753  GLU*     3.7     6.1    -      -       -      +
     763  VAL      3.2     0.2    -      -       -      -
     773  LYS*     1.3    75.1    -      -       -      +
     793  ALA*     1.3    64.9    +      -       -      +
     813  MET*     3.3     7.5    +      -       +      +
     823  GLU*     3.1    19.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 79 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     772  LYS*     5.3     4.4    -      -       -      +
     753  GLU      2.9    18.6    +      -       -      +
     763  VAL*     3.8     5.8    -      -       -      +
     783  LEU*     1.3    75.9    -      -       -      +
     803  ASN*     1.3    62.2    +      -       -      +
     823  GLU*     3.2    21.4    +      -       -      +
     833  ALA*     3.3    12.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 80 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     821  GLU*     4.6    12.1    +      -       -      -
     763  VAL*     3.0    19.2    +      -       +      +
     773  LYS*     3.6     7.2    +      -       -      +
     793  ALA*     1.3    78.5    -      -       -      +
     813  MET*     1.3    57.8    +      -       -      +
     833  ALA*     3.0    11.8    +      -       -      +
     843  GLU*     2.8    56.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 81 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     781  LEU*     3.8    25.8    -      -       +      +
     811  MET*     3.2    49.1    -      -       +      -
     821  GLU*     3.2    29.4    -      -       -      +
     851  ILE*     3.6    12.5    -      -       +      +
     782  LEU*     4.5     1.1    -      -       +      -
     812  MET*     3.4    22.9    -      -       +      -
     773  LYS*     3.0    17.6    +      -       +      +
     783  LEU*     3.3    12.3    +      -       +      +
     803  ASN*     1.3    75.7    -      -       -      +
     823  GLU*     1.3    57.8    +      -       -      +
     843  GLU*     3.1    10.2    +      -       -      +
     853  ILE*     2.8    33.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 82 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     772  LYS*     2.9    35.1    +      -       -      +
     812  MET*     3.2    19.0    -      -       +      +
     783  LEU      3.1    10.7    +      -       -      +
     793  ALA*     3.4    14.5    -      -       -      +
     803  ASN      3.1     0.2    -      -       -      -
     813  MET*     1.3    77.1    -      -       -      +
     833  ALA*     1.3    57.3    +      -       -      +
     853  ILE*     3.2     6.2    +      -       +      +
     863  ASN*     2.9    45.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 83 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     793  ALA      3.3     8.0    +      -       -      +
     803  ASN*     3.0    15.1    +      -       -      +
     823  GLU*     1.3    78.6    -      -       -      +
     843  GLU*     1.3    58.1    +      -       -      +
     863  ASN*     3.7     9.1    -      -       -      +
     873  THR*     2.8    36.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 84 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     821  GLU*     5.2     3.1    -      -       -      +
     851  ILE*     4.2    19.7    -      -       +      -
     891  LYS*     2.9    36.2    +      -       -      -
     803  ASN*     2.8    45.6    +      -       -      +
     813  MET*     3.1    12.1    +      -       -      +
     833  ALA*     1.3    76.4    -      -       -      +
     853  ILE*     1.3    57.3    +      -       -      +
     873  THR*     3.3     9.9    +      -       -      +
     883  LEU*     2.9    34.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 85 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     851  ILE*     4.3     9.9    -      -       +      -
     812  MET*     3.6    43.3    -      -       +      +
     842  GLU*     4.1    13.2    -      -       +      -
     852  ILE*     3.6    37.7    -      -       +      -
     882  LEU*     3.9    17.7    -      -       +      -
     813  MET      2.8    11.6    +      -       -      +
     823  GLU*     3.6     5.8    -      -       +      +
     843  GLU*     1.3    73.0    -      -       -      +
     863  ASN*     1.3    63.9    +      -       -      +
     883  LEU*     3.1     9.8    +      -       +      +
     893  LYS*     2.9    44.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 86 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     823  GLU*     2.9    38.2    +      -       -      +
     833  ALA*     3.7     9.3    -      -       -      +
     853  ILE*     1.3    77.7    -      -       -      +
     873  THR*     1.3    62.2    +      -       -      +
     893  LYS*     3.3    24.9    +      -       -      +
     903  SER*     3.2    25.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 87 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     891  LYS*     6.4     1.6    -      -       -      -
     833  ALA*     2.8    24.4    +      -       -      +
     843  GLU*     3.5    11.2    -      -       -      +
     863  ASN*     1.3    78.0    -      -       -      +
     883  LEU*     1.3    63.7    +      -       +      +
     903  SER*     3.2     8.1    +      -       -      -
     913  LYS*     3.0    46.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 88 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     851  ILE*     4.2    19.1    -      -       +      +
     881  LEU*     4.0    29.2    -      -       +      -
     891  LYS*     3.9    41.3    -      -       +      +
     921  LEU*     4.0    24.2    -      -       +      +
     882  LEU*     4.1    12.1    -      -       +      -
     843  GLU      2.9    18.3    +      -       -      +
     853  ILE*     3.1    11.2    +      -       +      +
     873  THR*     1.3    78.0    -      -       +      +
     893  LYS*     1.3    57.0    +      -       -      +
     913  LYS*     3.2    12.2    +      -       +      +
     923  LEU*     2.9    31.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 89 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     842  GLU*     2.9    36.6    +      -       -      -
     882  LEU*     3.7    30.7    -      -       +      +
     853  ILE*     2.9    33.9    +      -       -      +
     863  ASN*     3.5    23.9    +      -       -      +
     873  THR      3.3     0.2    -      -       -      -
     883  LEU*     1.3    76.4    -      -       -      +
     903  SER*     1.3    62.9    +      -       -      +
     923  LEU*     3.4     2.3    +      -       -      +
     933  GLU*     3.0    37.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 90 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     863  ASN      3.2    13.2    +      -       -      -
     873  THR*     3.5     9.8    -      -       -      -
     893  LYS*     1.3    78.4    -      -       -      +
     913  LYS*     1.3    59.7    +      -       -      +
     933  GLU*     3.1    16.4    +      -       -      +
     943  LEU*     2.9    28.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 91 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     891  LYS*     6.1     4.4    -      -       -      +
     921  LEU*     3.6    20.4    -      -       +      -
     873  THR*     3.0    36.7    +      -       +      +
     883  LEU*     3.6    16.7    -      -       +      +
     903  SER*     1.3    77.2    -      -       -      +
     923  LEU*     1.3    56.7    -      -       -      +
     943  LEU*     3.2    14.8    +      -       +      +
     953  THR*     2.9    31.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 92 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     921  LEU*     4.1    13.2    -      -       +      +
     882  LEU*     3.9    19.1    -      -       +      +
     912  LYS*     3.6    33.4    -      -       +      -
     922  LEU*     3.7    32.8    -      -       +      +
     952  THR*     3.5    22.9    -      -       +      +
     883  LEU      2.9    16.9    +      -       -      +
     893  LYS*     3.9     5.6    -      -       -      +
     913  LYS*     1.3    73.8    -      -       -      +
     933  GLU*     1.3    66.4    +      -       -      +
     953  THR*     3.3     8.1    +      -       -      -
     963  ASN*     2.9    29.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 93 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     893  LYS*     3.0    32.2    +      -       -      +
     903  SER*     3.3    16.0    -      -       -      +
     923  LEU*     1.3    77.2    -      -       -      +
     943  LEU*     1.3    55.4    +      -       -      +
     963  ASN*     3.2     9.3    +      -       -      +
     973  LYS*     2.9    50.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 94 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1301  GLU      3.1    27.4    -      -       -      +
    1311  LEU*     3.7    21.3    -      -       +      +
    1321  ARG*     3.6    30.5    -      -       +      +
     903  SER      2.9    12.0    +      -       -      +
     913  LYS*     3.2    16.1    +      -       +      +
     933  GLU*     1.3    73.8    -      -       -      +
     953  THR*     1.3    60.4    +      -       -      +
     973  LYS*     3.1    15.2    +      -       +      +
     983  LEU*     2.9    32.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 95 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     921  LEU*     3.6    12.6    -      -       +      +
     951  THR*     4.4     5.4    -      -       +      -
     961  ASN*     3.1    28.7    +      -       -      +
     952  THR*     4.0    13.7    -      -       +      -
     913  LYS      2.9    16.0    +      -       -      -
     923  LEU*     3.4    12.6    -      -       -      -
     943  LEU*     1.3    76.6    -      -       -      +
     963  ASN*     1.3    58.2    +      -       -      +
     983  LEU*     3.4     4.8    +      -       -      -
     993  HIS*     2.8    65.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 96 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     912  LYS*     5.4     1.7    -      -       -      +
     952  THR*     2.8    41.9    +      -       -      +
     982  LEU*     6.2     1.8    -      -       -      +
     923  LEU*     2.9    23.3    +      -       -      +
     933  GLU*     3.2    11.0    +      -       -      +
     953  THR*     1.3    79.1    -      -       -      +
     973  LYS*     1.3    61.6    +      -       +      +
     993  HIS*     3.3     5.0    +      -       -      +
    1003  ALA*     3.0    24.9    +      -       -      +
    1033  MET*     5.3     0.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 97 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1301  GLU*     3.8    33.4    +      -       +      +
    1311  LEU*     3.9    13.1    -      -       +      +
     933  GLU*     2.9    39.2    +      -       -      +
     943  LEU*     3.1    17.4    +      -       +      +
     963  ASN*     1.3    76.5    -      -       -      +
     983  LEU*     1.3    57.1    +      -       -      +
    1003  ALA*     3.3     6.1    +      -       -      +
    1013  PHE*     3.0    28.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 98 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     961  ASN*     5.8     5.2    -      -       -      +
     991  HIS*     3.7    22.9    -      -       +      +
    1111  PHE*     5.1     7.9    -      -       +      -
    1131  VAL*     4.9     3.4    -      -       +      -
    1311  LEU*     3.8    24.2    -      -       +      +
    2191  PHE*     3.6    43.7    -      -       +      -
     943  LEU*     2.9    17.7    +      -       +      +
     953  THR*     3.8     7.2    -      -       -      +
     973  LYS*     1.3    76.7    -      -       -      +
     993  HIS*     1.3    55.3    +      -       +      +
    1013  PHE*     3.4     7.3    +      -       +      +
    1023  SER*     2.6    43.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 99 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     951  THR*     4.0    11.2    -      -       +      -
     961  ASN*     4.5     4.4    +      -       -      -
     991  HIS*     3.2    54.1    +      +       +      +
     952  THR*     3.9    19.0    +      -       +      +
     992  HIS*     4.3    17.5    -      -       +      +
     953  THR*     2.8    52.0    +      -       +      +
     963  ASN*     3.8     7.2    -      -       -      +
     973  LYS      3.3     0.2    -      -       -      -
     983  LEU*     1.3    77.9    -      -       +      +
    1003  ALA*     1.3    59.0    +      -       -      +
    1023  SER*     3.2     3.3    +      -       -      -
    1033  MET*     2.9    49.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 100 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     963  ASN      3.0    16.6    +      -       -      +
     973  LYS*     3.7     6.5    -      -       -      +
     993  HIS*     1.3    76.5    -      -       -      +
    1013  PHE*     1.3    61.2    +      -       -      +
    1033  MET*     3.1    22.1    +      -       +      +
    1043  GLY      3.1     0.5    +      -       -      -
    1053  LYS*     2.9    50.4    +      -       +      +
    1113  PHE*     4.0    13.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 101 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    1131  VAL*     3.4    38.1    -      -       +      -
    1141  THR*     3.7     8.1    -      -       -      +
    1151  ASN*     3.2    66.5    -      -       +      +
    1271  LEU*     3.7    27.8    -      -       +      -
    1311  LEU*     3.7    21.1    -      -       +      -
    2151  ALA*     3.9     9.4    -      -       +      -
    2171  CYS*     4.0    21.5    -      -       +      -
    2191  PHE*     5.4     0.2    -      +       -      -
     973  LYS      3.0    17.1    +      -       -      +
     983  LEU*     3.5     9.2    -      -       +      +
    1003  ALA*     1.3    75.8    -      -       -      +
    1023  SER*     1.3    58.7    +      -       -      +
    1043  GLY      3.0    14.6    +      -       -      -
    1053  LYS*     4.4     5.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 102 (chain 3). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     991  HIS*     2.9    33.6    +      -       -      -
    1031  MET*     3.7    25.3    -      -       -      +
    1131  VAL*     3.5    21.6    -      -       -      +
    1141  THR      4.4     6.4    -      -       -      +
     983  LEU*     2.6    20.4    +      -       -      +
     993  HIS      3.2     5.6    +      -       -      -
    1013  PHE*     1.3    76.5    -      -       -      +
    1033  MET*     1.3    61.1    +      -       -      +
    1043  GLY*     3.1     1.3    +      -       -      -
----------------------------------------------------------
 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