Contacts of the helix formed by residues 1114 - 1142 (chain A) in PDB entry 6PUO


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 GLU1114 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1112A  LYS*     4.2     5.5    -      -       -      +
   1113A  LEU*     1.3    82.9    -      -       -      +
   1115A  LYS*     1.3    59.2    +      -       +      +
   1116A  ASN*     3.3    15.9    -      -       -      +
   1117A  GLU*     3.1    11.4    +      -       +      +
   1118A  GLU*     2.7    34.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS1115 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1113A  LEU      4.1     1.2    +      -       -      -
   1114A  GLU*     1.3    75.8    +      -       -      +
   1116A  ASN*     1.3    66.7    +      -       +      +
   1118A  GLU*     3.8    11.6    -      -       -      +
   1119A  ALA*     2.9    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1116 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1114A  GLU*     3.4    19.5    -      -       -      +
   1115A  LYS*     1.3    88.6    -      -       +      +
   1117A  GLU*     1.3    69.7    +      -       -      +
   1119A  ALA*     4.1     4.7    +      -       -      +
   1120A  ALA*     3.8    15.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU1117 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    703A  LYS*     2.6    37.1    +      -       -      +
   1113A  LEU*     3.4    33.0    -      -       -      +
   1114A  GLU*     3.1    10.9    +      -       +      +
   1116A  ASN*     1.3    86.8    +      -       -      +
   1118A  GLU*     1.3    61.4    +      -       -      +
   1119A  ALA      3.2     0.2    -      -       -      -
   1120A  ALA*     3.2     8.2    +      -       +      +
   1121A  LEU*     3.0    29.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU1118 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707A  ARG*     2.4    38.9    +      -       -      +
    708A  VAL      4.1     6.9    -      -       -      +
    709A  SER*     5.2     0.3    -      -       -      -
    710A  GLU      5.7     0.7    +      -       -      -
   1112A  LYS*     5.5     6.2    -      -       -      +
   1113A  LEU*     4.5    24.0    +      -       +      +
   1114A  GLU      2.7    19.6    +      -       -      +
   1115A  LYS*     3.8    13.5    -      -       -      +
   1117A  GLU*     1.3    80.9    +      -       -      +
   1119A  ALA*     1.3    56.8    +      -       -      +
   1121A  LEU*     3.3     6.5    +      -       +      +
   1122A  LEU*     2.9    40.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1119 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1115A  LYS      2.9    17.4    +      -       -      +
   1116A  ASN*     4.2     6.5    -      -       -      +
   1118A  GLU*     1.3    76.6    -      -       -      +
   1120A  ALA*     1.3    56.1    +      -       -      +
   1122A  LEU*     3.3     7.1    +      -       -      +
   1123A  SER*     2.9    30.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1120 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    700A  ARG*     4.6    14.8    +      -       -      +
   1116A  ASN      3.8     9.9    +      -       -      +
   1117A  GLU*     3.2    11.5    +      -       +      +
   1119A  ALA*     1.3    77.6    -      -       -      +
   1121A  LEU*     1.3    62.4    +      -       -      +
   1123A  SER*     2.7    20.5    +      -       -      -
   1124A  TRP*     3.0    14.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1121 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    700A  ARG*     4.1    25.3    -      -       +      +
    703A  LYS*     4.5    18.2    -      -       +      -
    704A  LEU*     3.8    33.7    -      -       +      -
    707A  ARG*     4.4    13.9    -      -       -      -
   1113A  LEU*     4.3    24.2    -      -       +      -
   1117A  GLU*     3.0    16.3    +      -       -      +
   1118A  GLU*     3.6    10.3    -      -       +      +
   1119A  ALA      3.3     0.2    -      -       -      -
   1120A  ALA*     1.3    76.1    -      -       -      +
   1122A  LEU*     1.3    61.2    +      -       +      +
   1124A  TRP*     3.3    22.6    +      -       +      +
   1125A  GLU*     3.0    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1122 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    646A  GLN*     4.0    33.3    -      -       +      +
    647A  ASP*     4.2    11.2    -      -       +      -
    707A  ARG*     3.5    34.3    -      -       -      +
   1118A  GLU*     2.9    31.9    +      -       +      +
   1119A  ALA*     3.9     6.5    -      -       -      +
   1121A  LEU*     1.3    79.0    -      -       +      +
   1123A  SER*     1.3    57.9    +      -       -      +
   1125A  GLU*     3.3    23.6    +      -       -      +
   1126A  ILE*     2.9    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1123 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1119A  ALA      2.9    15.1    +      -       -      -
   1120A  ALA*     2.7    22.3    +      -       -      -
   1122A  LEU*     1.3    72.0    -      -       -      +
   1124A  TRP*     1.3    64.8    +      -       -      +
   1126A  ILE*     3.3    10.8    +      -       -      +
   1127A  TYR*     3.0    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP1124 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    693A  CYS*     3.5    35.2    -      -       -      -
    696A  LYS*     4.2    18.9    -      -       +      +
    697A  ASP*     4.1    15.9    -      -       +      -
    700A  ARG*     3.3    57.9    -      -       +      +
    701A  ALA*     4.4     3.4    -      -       -      -
    704A  LEU*     4.7     3.4    -      -       +      -
   1120A  ALA      3.0    14.7    +      -       -      +
   1121A  LEU*     3.4    23.3    -      -       +      +
   1123A  SER*     1.3    77.3    +      -       -      +
   1125A  GLU*     1.3    62.6    +      -       -      +
   1127A  TYR*     3.3    12.9    +      +       +      +
   1128A  LEU*     3.1    53.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1125 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    646A  GLN      4.4     3.6    -      -       -      +
    647A  ASP*     3.3    10.7    -      -       -      +
    648A  CYS*     2.8    45.6    +      -       -      -
    649A  ILE*     3.6    11.3    +      -       +      +
    689A  VAL*     5.2     3.4    -      -       +      +
    693A  CYS*     5.4     3.1    -      -       -      -
    704A  LEU*     4.1    31.8    -      -       +      +
    707A  ARG*     5.2     1.9    +      -       -      -
   1121A  LEU      3.0    11.8    +      -       -      +
   1122A  LEU*     3.3    26.7    +      -       -      +
   1124A  TRP*     1.3    79.8    -      -       +      +
   1126A  ILE*     1.3    57.8    +      -       -      +
   1128A  LEU*     3.3     6.8    +      -       -      +
   1129A  LYS*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1126 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    645A  SER      3.3    18.4    -      -       -      +
    646A  GLN*     3.3    32.1    -      -       +      +
    648A  CYS*     6.1     0.2    -      -       -      -
   1122A  LEU      2.9    18.8    +      -       -      +
   1123A  SER*     3.3    13.2    +      -       -      +
   1125A  GLU*     1.3    75.7    -      -       -      +
   1127A  TYR*     1.3    64.5    +      -       -      +
   1129A  LYS*     3.2    20.5    +      -       -      +
   1130A  GLU*     3.0    23.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR1127 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    696A  LYS*     6.5     0.7    -      -       -      -
   1123A  SER      3.0    12.6    +      -       -      +
   1124A  TRP*     3.3    16.1    +      +       +      +
   1126A  ILE*     1.3    77.9    -      -       -      +
   1128A  LEU*     1.3    82.5    +      -       +      +
   1130A  GLU*     3.3    11.0    +      -       +      +
   1131A  ASN*     3.1    30.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1128 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689A  VAL*     5.5     4.7    -      -       +      +
    692A  GLU*     4.1    20.4    -      -       +      +
    693A  CYS*     3.7    33.4    -      -       +      +
    696A  LYS*     4.3    23.3    -      -       +      +
   1124A  TRP*     3.1    51.8    +      -       +      +
   1125A  GLU*     3.9     4.7    -      -       -      +
   1126A  ILE      3.3     0.2    -      -       -      -
   1127A  TYR*     1.3    93.4    -      -       +      +
   1129A  LYS*     1.3    59.8    +      -       -      +
   1131A  ASN*     3.3     9.1    +      -       +      +
   1132A  TYR*     3.0    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS1129 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    642A  TRP*     4.5    15.9    -      -       +      +
    643A  ALA*     2.5    34.0    +      -       -      +
    644A  GLN*     4.4     1.0    -      -       -      +
    645A  SER      3.7    21.2    +      -       -      -
    648A  CYS*     3.6    36.3    -      -       +      -
    689A  VAL*     4.7    15.1    -      -       +      +
   1125A  GLU      2.9    13.4    +      -       -      +
   1126A  ILE*     3.2    23.1    +      -       -      +
   1128A  LEU*     1.3    75.1    -      -       -      +
   1130A  GLU*     1.3    71.1    +      -       -      +
   1132A  TYR*     3.2     7.4    +      -       -      +
   1133A  LEU*     3.0    33.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1130 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    643A  ALA      5.3     1.4    -      -       -      +
   1126A  ILE*     3.0    13.9    +      -       +      +
   1127A  TYR*     3.5    15.0    -      -       +      +
   1128A  LEU      3.3     0.2    -      -       -      -
   1129A  LYS*     1.3    87.3    +      -       -      +
   1131A  ASN*     1.3    61.4    +      -       -      +
   1133A  LEU*     3.3    14.6    +      -       -      +
   1134A  GLN*     3.1    40.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN1131 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    692A  GLU*     3.2    26.1    +      -       -      -
    696A  LYS*     5.7     1.6    -      -       -      +
   1127A  TYR*     3.1    23.9    +      -       +      +
   1128A  LEU*     3.7    15.2    -      -       +      +
   1130A  GLU*     1.3    76.3    -      -       -      +
   1132A  TYR*     1.3    62.8    +      -       -      +
   1134A  GLN*     3.3    11.1    +      -       -      +
   1135A  ASN*     3.1    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR1132 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    642A  TRP*     4.7     7.2    -      +       -      -
    684A  HIS      4.7     1.4    +      -       -      -
    685A  ARG*     4.2    16.6    -      -       +      -
    688A  GLY*     3.5    34.5    -      -       -      +
    689A  VAL*     3.7    25.6    -      -       +      -
    692A  GLU*     4.4    17.3    -      -       +      -
   1128A  LEU      3.0    17.0    +      -       -      +
   1129A  LYS*     3.2     6.9    +      -       +      +
   1131A  ASN*     1.3    80.1    -      -       -      +
   1133A  LEU*     1.3    81.2    +      -       +      +
   1135A  ASN*     3.3     7.2    +      -       +      +
   1136A  ARG*     2.9    63.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1133 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    642A  TRP*     4.5    12.6    -      -       +      -
    643A  ALA*     4.0    35.2    -      -       +      +
    685A  ARG*     5.4     2.0    -      -       -      +
   1129A  LYS*     3.0    29.0    +      -       +      +
   1130A  GLU*     3.7    15.9    -      -       -      +
   1132A  TYR*     1.3    95.8    -      -       +      +
   1134A  GLN*     1.3    65.8    +      -       -      +
   1136A  ARG*     3.9    14.8    -      -       -      +
   1137A  GLN*     3.0    28.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1134 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1130A  GLU*     3.1    32.3    +      -       +      +
   1131A  ASN*     3.5    10.5    -      -       -      +
   1132A  TYR      3.3     0.2    -      -       -      -
   1133A  LEU*     1.3    78.0    -      -       -      +
   1135A  ASN*     1.3    65.3    +      -       -      +
   1137A  GLN*     3.9    16.3    +      -       -      +
   1138A  PHE*     3.0    25.9    +      -       -      +
    229D  SER      3.7     9.4    +      -       -      +
    230D  SER*     2.4    34.9    +      -       -      -
    231D  TYR*     4.7     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1135 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    692A  GLU*     4.3    11.9    +      -       -      +
   1131A  ASN*     3.1    36.5    +      -       -      +
   1132A  TYR*     3.3     9.3    +      -       +      +
   1134A  GLN*     1.3    78.2    -      -       -      +
   1136A  ARG*     1.3    58.1    +      -       -      +
   1138A  PHE*     3.4     8.8    +      -       -      +
   1139A  GLN*     3.0    46.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG1136 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    681A  GLU*     5.0    13.7    +      -       -      +
    684A  HIS*     6.2     1.6    -      -       -      +
    685A  ARG*     3.3    40.7    -      -       -      +
   1132A  TYR*     2.9    50.3    +      -       +      +
   1133A  LEU*     3.9    12.9    -      -       -      +
   1134A  GLN      3.3     0.2    -      -       -      -
   1135A  ASN*     1.3    77.9    -      -       -      +
   1137A  GLN*     1.3    56.7    +      -       -      +
   1139A  GLN*     3.4     8.9    +      -       -      +
   1140A  GLN*     2.9    57.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN1137 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1133A  LEU      3.0    17.6    +      -       -      +
   1134A  GLN*     3.9    17.2    +      -       -      +
   1136A  ARG*     1.3    77.0    -      -       -      +
   1138A  PHE*     1.3    65.4    +      -       -      +
   1140A  GLN*     3.2     9.8    +      -       -      +
   1141A  LYS*     3.0    38.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1138 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1134A  GLN      3.0    18.3    +      -       -      +
   1135A  ASN*     3.9     8.3    -      -       -      +
   1137A  GLN*     1.3    79.6    -      -       -      +
   1139A  GLN*     1.3    71.6    +      -       +      +
   1141A  LYS*     3.3    20.1    +      -       +      +
   1142A  GLN*     3.5    37.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN1139 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1135A  ASN*     3.0    34.2    +      -       -      +
   1136A  ARG*     3.9     6.7    -      -       -      +
   1138A  PHE*     1.3    89.4    -      -       +      +
   1140A  GLN*     1.3    63.2    +      -       +      +
   1142A  GLN*     3.3    18.0    +      -       -      +
   1143A  ARG*     4.0     8.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1140 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1136A  ARG*     2.9    57.7    +      -       +      +
   1137A  GLN*     3.2     7.6    +      -       -      +
   1139A  GLN*     1.3    75.9    -      -       +      +
   1141A  LYS*     1.3    64.4    +      -       -      +
   1142A  GLN      3.5     0.2    +      -       -      -
   1143A  ARG*     3.1    40.2    +      -       -      +
   1146A  GLN*     4.4     6.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS1141 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1137A  GLN*     3.0    30.6    +      -       -      +
   1138A  PHE*     3.5    15.7    -      -       +      +
   1139A  GLN      3.2     0.6    -      -       -      -
   1140A  GLN*     1.3    78.7    -      -       -      +
   1142A  GLN*     1.3    74.1    +      -       -      +
   1143A  ARG      3.2    10.0    +      -       -      +
   1146A  GLN*     3.9    21.4    -      -       -      +
   1147A  LYS*     4.6     9.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1142 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1138A  PHE*     3.5    37.2    -      -       +      +
   1139A  GLN*     3.3    11.3    +      -       -      +
   1140A  GLN      3.3     1.6    -      -       -      -
   1141A  LYS*     1.3    99.9    -      -       -      +
   1143A  ARG*     1.3    63.0    +      -       -      +
   1144A  PRO*     3.7     5.2    -      -       -      +
   1147A  LYS*     4.0    25.6    +      -       -      +
----------------------------------------------------------
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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