Contacts of the helix formed by residues 86 - 116 (chain D) in PDB entry 5NJ8


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 LYS 86 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87B  GLU*     4.6    10.7    +      -       -      +
     91B  ARG*     3.1    26.3    -      -       -      +
     84D  ALA      3.3     7.5    +      -       -      -
     85D  ASP*     1.3    68.1    -      -       -      +
     87D  GLU*     1.3    65.0    +      -       -      +
     88D  ARG*     3.0    26.6    +      -       +      +
     89D  LEU*     3.2    21.5    +      -       +      +
     90D  ALA*     3.9     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 87 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84D  ALA*     3.4    34.3    +      -       -      +
     85D  ASP      2.8     6.8    +      -       -      +
     86D  LYS*     1.3    77.0    +      -       -      +
     88D  ARG*     1.3    58.3    +      -       +      +
     90D  ALA*     3.3     7.9    +      -       -      +
     91D  ARG*     2.5    47.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 88 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  LYS*     4.2    21.6    -      -       -      +
     87D  GLU*     1.3    85.8    -      -       +      +
     89D  LEU*     1.3    69.0    +      -       -      +
     91D  ARG*     3.9    15.9    -      -       -      +
     92D  GLU*     2.5    41.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 89 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  LYS*     3.2    15.3    +      -       +      +
     88D  ARG*     1.3    89.0    -      -       +      +
     90D  ALA*     1.3    61.5    +      -       -      +
     92D  GLU*     3.9     3.3    -      -       -      +
     93D  ASN*     3.0    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 90 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86D  LYS      3.9     1.7    +      -       -      +
     87D  GLU*     3.3    12.5    +      -       -      +
     89D  LEU*     1.3    78.7    -      -       -      +
     91D  ARG*     1.3    57.2    +      -       -      +
     93D  ASN*     3.6     2.4    -      -       -      -
     94D  HIS*     2.7    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 91 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  GLU*     2.5    31.5    +      -       +      +
     88D  ARG*     3.6    13.6    -      -       -      +
     90D  ALA*     1.3    68.5    -      -       -      +
     92D  GLU*     1.3    59.2    +      -       -      +
     93D  ASN      2.7    15.6    +      -       -      -
     94D  HIS*     3.0    15.2    +      -       -      +
     95D  SER*     3.8    13.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 92 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88D  ARG*     2.5    25.0    +      -       +      +
     89D  LEU*     3.9     2.9    -      -       -      +
     91D  ARG*     1.3    77.1    -      -       -      +
     93D  ASN*     1.3    88.8    +      -       -      +
     95D  SER*     5.3     2.0    -      -       -      -
     96D  GLU*     5.2     4.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 93 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89D  LEU*     3.0    27.0    +      -       -      +
     90D  ALA*     3.6     2.9    -      -       -      +
     91D  ARG      2.7     5.3    +      -       -      -
     92D  GLU*     1.3   100.0    +      -       -      +
     94D  HIS*     1.3    62.0    +      -       -      +
     95D  SER      3.5     2.0    -      -       -      -
     96D  GLU*     3.4    18.2    +      -       -      +
     97D  ILE*     3.1    26.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 94 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90D  ALA*     2.7    22.8    +      -       +      +
     91D  ARG*     3.0     6.2    +      -       -      +
     93D  ASN*     1.3    69.6    -      -       -      +
     95D  SER*     1.3    67.7    +      -       -      +
     96D  GLU      2.9     3.4    +      -       -      -
     97D  ILE*     3.3    13.3    +      -       +      +
     98D  GLU*     3.2    39.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 95 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91D  ARG*     3.8     8.7    +      -       -      +
     92D  GLU      6.0     1.3    -      -       -      -
     93D  ASN      3.5     0.2    -      -       -      -
     94D  HIS*     1.3    79.1    -      -       -      +
     96D  GLU*     1.3    56.5    +      -       -      +
     98D  GLU*     4.7     2.4    -      -       -      +
     99D  ARG*     3.3    30.6    +      -       -      +
    102D  ARG*     4.9     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 96 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92D  GLU      5.2     3.5    +      -       -      +
     93D  ASN*     3.4    23.5    +      -       -      +
     94D  HIS      3.0     0.8    -      -       -      -
     95D  SER*     1.3    76.6    -      -       -      +
     97D  ILE*     1.3    56.4    +      -       -      +
     98D  GLU      3.2     0.9    -      -       -      -
     99D  ARG*     2.9    35.7    +      -       -      +
    100D  ARG*     2.6    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 97 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  ASN*     3.1    18.2    +      -       +      +
     94D  HIS*     3.4    20.6    -      -       +      +
     96D  GLU*     1.3    78.5    -      -       -      +
     98D  GLU*     1.3    64.6    +      -       -      +
    100D  ARG*     3.0    14.0    +      -       +      -
    101D  ARG*     2.9    41.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 98 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94D  HIS*     3.2    32.0    +      -       +      +
     95D  SER*     4.7     2.5    -      -       -      +
     97D  ILE*     1.3    83.6    -      -       -      +
     99D  ARG*     1.3    63.0    +      -       -      +
    101D  ARG*     2.9    49.0    +      -       -      +
    102D  ARG*     3.4    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 99 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95D  SER*     3.3    18.2    +      -       -      +
     96D  GLU*     2.9    44.5    +      -       -      +
     98D  GLU*     1.3    78.8    -      -       -      +
    100D  ARG*     1.3    62.0    +      -       -      +
    102D  ARG*     3.2    40.9    +      -       -      +
    103D  ASN*     3.3    32.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 100 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96D  GLU*     2.6    20.3    +      -       +      +
     97D  ILE*     3.0    22.0    +      -       +      +
     99D  ARG*     1.3    72.5    -      -       -      +
    101D  ARG*     1.3    61.1    +      -       -      +
    103D  ASN*     3.6    15.0    +      -       -      +
    104D  LYS*     3.4    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 101 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65C  ASP*     6.0     1.8    -      -       -      +
     66C  LYS*     5.1     5.1    -      -       -      +
     67C  LEU*     3.5    37.1    -      -       +      +
     97D  ILE*     2.9    31.2    +      -       +      +
     98D  GLU*     2.9    45.2    +      -       -      +
     99D  ARG      3.1     0.4    -      -       -      -
    100D  ARG*     1.3    75.6    -      -       -      +
    102D  ARG*     1.3    66.0    +      -       -      +
    104D  LYS*     3.2     8.0    +      -       -      +
    105D  MET*     3.0    37.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 102 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95D  SER      4.9     3.2    +      -       -      -
     98D  GLU*     3.4    29.7    +      -       -      +
     99D  ARG*     3.2    47.8    +      -       -      +
    101D  ARG*     1.3    76.8    -      -       -      +
    103D  ASN*     1.3    67.0    +      -       -      +
    104D  LYS      3.2     0.3    +      -       -      -
    105D  MET*     3.2     7.9    +      -       -      +
    106D  THR*     3.0    28.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 103 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99D  ARG*     3.3    30.1    +      -       -      +
    100D  ARG*     3.8    16.2    -      -       -      +
    101D  ARG      3.3     0.6    -      -       -      -
    102D  ARG*     1.3    78.0    -      -       -      +
    104D  LYS*     1.3    57.7    +      -       +      +
    106D  THR*     3.6     5.0    +      -       -      -
    107D  ALA*     3.0    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 104 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67C  LEU*     4.5    20.5    -      -       +      +
    100D  ARG      3.4    10.9    +      -       -      +
    101D  ARG*     3.2     9.8    +      -       -      +
    102D  ARG      3.2     0.4    -      -       -      -
    103D  ASN*     1.3    77.4    -      -       +      +
    105D  MET*     1.3    67.5    +      -       -      +
    107D  ALA*     2.7    20.1    +      -       +      +
    108D  TYR*     2.8    52.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 105 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43C  LEU*     5.9     6.5    -      -       -      -
     47C  LEU*     4.9     8.3    -      -       +      -
     66C  LYS*     3.8    30.3    -      -       +      -
     67C  LEU*     3.9    25.2    -      -       +      +
     70C  LEU*     3.5    25.3    -      -       +      +
    101D  ARG*     3.0    22.1    +      -       -      +
    102D  ARG*     3.7    10.3    -      -       -      +
    104D  LYS*     1.3    76.1    -      -       -      +
    106D  THR*     1.3    58.9    +      -       -      +
    108D  TYR*     3.6     3.9    +      -       -      +
    109D  ILE*     3.0    32.1    +      -       +      +
    128D  LYS*     5.7     3.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 106 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102D  ARG*     3.0    17.4    +      -       -      +
    103D  ASN*     4.0     5.6    -      -       -      -
    105D  MET*     1.3    74.4    -      -       -      +
    107D  ALA*     1.3    59.5    +      -       -      +
    109D  ILE*     3.2     6.5    -      -       -      +
    110D  THR*     2.7    45.8    +      -       -      +
    128D  LYS*     3.5    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 107 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103D  ASN      3.0    15.0    +      -       -      +
    104D  LYS*     2.7    19.7    +      -       +      +
    106D  THR*     1.3    69.3    -      -       -      +
    108D  TYR*     1.3    57.7    +      -       +      +
    110D  THR*     3.3     5.5    +      -       -      -
    111D  GLU*     2.7    36.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 108 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67C  LEU*     3.3    42.7    -      -       +      +
     70C  LEU*     3.7    24.7    -      -       +      +
     71C  ARG*     3.4    34.7    -      -       +      +
     74C  VAL*     4.6     3.7    -      -       +      +
    155C  HIS*     4.1    20.7    -      +       -      -
    156C  GLN*     5.8     1.6    -      -       -      +
    104D  LYS*     2.8    54.5    +      -       +      +
    105D  MET      3.9     2.0    -      -       -      +
    107D  ALA*     1.3    74.8    -      -       +      +
    109D  ILE*     1.3    59.1    +      -       -      +
    111D  GLU*     2.8    35.0    +      -       -      +
    112D  LEU*     3.0    16.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 109 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43C  LEU*     5.7     0.4    -      -       +      -
     70C  LEU*     4.8     7.8    -      -       +      +
    105D  MET*     3.0    20.5    +      -       +      +
    106D  THR*     3.2    18.4    -      -       -      +
    108D  TYR*     1.3    76.7    -      -       -      +
    110D  THR*     1.3    69.1    +      -       -      +
    112D  LEU*     3.5    10.9    -      -       +      +
    113D  SER      3.1    17.5    +      -       -      -
    128D  LYS*     3.5    46.0    -      -       +      +
    131D  ILE*     3.4    32.8    -      -       +      +
    132D  LEU*     3.6    37.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 110 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106D  THR*     2.7    33.1    +      -       -      +
    107D  ALA*     3.6     5.2    -      -       -      -
    109D  ILE*     1.3    78.3    -      -       -      +
    111D  GLU*     1.3    64.9    +      -       -      +
    113D  SER*     2.8    25.5    +      -       -      +
    114D  ASP*     3.2     9.5    +      -       -      +
    131D  ILE*     5.0     4.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 111 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74C  VAL*     3.8    17.2    -      -       +      +
     78C  ARG*     2.9    44.9    +      -       -      +
    155C  HIS*     4.3    12.9    +      -       -      -
    107D  ALA      2.7    17.2    +      -       -      +
    108D  TYR*     2.8    36.9    +      -       -      +
    110D  THR*     1.3    73.2    -      -       -      +
    112D  LEU*     1.3    54.9    +      -       -      +
    114D  ASP*     3.1    26.8    +      -       -      +
    115D  MET*     3.2     6.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 112 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50C  LEU*     4.8     4.7    -      -       +      -
     70C  LEU*     4.4    15.5    -      -       +      +
     73C  SER*     4.4    17.3    -      -       -      +
     74C  VAL*     3.8    21.8    -      -       +      +
     77C  LEU*     4.2    14.1    -      -       +      -
    108D  TYR      3.0    14.0    +      -       -      +
    109D  ILE*     3.5    15.0    -      -       +      +
    111D  GLU*     1.3    74.1    -      -       -      +
    113D  SER*     1.3    57.4    +      -       -      +
    115D  MET*     2.8     8.2    +      -       -      -
    116D  VAL*     2.6    39.0    +      -       +      +
    131D  ILE*     3.4    26.9    -      -       +      -
    132D  LEU*     5.2     1.3    -      -       +      +
    135D  ALA*     3.6    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 113 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109D  ILE      3.1    15.4    +      -       -      -
    110D  THR*     2.8    27.9    +      -       -      +
    112D  LEU*     1.3    77.3    -      -       -      +
    114D  ASP*     1.3    58.6    +      -       -      +
    115D  MET      3.5     0.2    +      -       -      -
    116D  VAL*     4.2     1.0    +      -       -      -
    119D  CYS*     2.9    38.8    -      -       -      +
    120D  SER      3.8     0.2    +      -       -      -
    126D  PRO*     4.5    10.7    -      -       -      +
    131D  ILE*     3.6    34.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 114 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  GLN*     6.4     0.2    -      -       -      -
    250C  LYS*     3.5    40.4    +      -       -      +
    110D  THR*     3.2     6.5    +      -       +      +
    111D  GLU*     3.1    16.4    +      -       +      +
    113D  SER*     1.3    81.7    +      -       -      +
    115D  MET*     1.3    60.6    +      -       -      +
    120D  SER*     3.9    22.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 115 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74C  VAL*     4.8     3.4    -      -       +      +
     77C  LEU*     3.7    29.6    -      -       +      +
     78C  ARG*     3.8    25.1    -      -       +      +
     81C  SER*     3.1    33.7    -      -       -      +
    248C  GLY      4.6     0.2    -      -       -      -
    249C  GLN*     3.3    38.4    -      -       +      -
    250C  LYS      5.1     0.2    -      -       -      +
    111D  GLU      3.2     4.8    +      -       -      +
    112D  LEU*     2.8    23.7    +      -       +      +
    114D  ASP*     1.3    78.9    -      -       -      +
    116D  VAL*     1.3    67.4    +      -       -      +
    117D  PRO*     3.3     7.1    -      -       -      +
    120D  SER*     4.5     2.3    -      -       -      -
    138D  HIS*     5.6     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 116 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LEU*     4.3    14.4    -      -       +      -
    112D  LEU*     2.6    28.0    +      -       +      +
    113D  SER*     4.2     0.9    +      -       -      -
    114D  ASP      3.8     0.2    -      -       -      -
    115D  MET*     1.3    69.4    -      -       -      +
    117D  PRO*     1.3    64.6    -      -       +      +
    118D  THR*     3.0    27.1    -      -       +      +
    119D  CYS*     4.3     9.4    -      -       +      +
    120D  SER*     2.6    36.4    +      -       -      -
    131D  ILE*     5.4     0.9    -      -       +      +
    134D  MET*     4.1     6.7    -      -       +      +
    135D  ALA*     3.8    28.7    -      -       +      +
    138D  HIS*     3.7    21.8    -      -       +      +
----------------------------------------------------------
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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