Contacts of the helix formed by residues 1009 - 1039 (chain H) in PDB entry 6BAA


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 GLY1009 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1005H  LEU      3.0    11.8    +      -       -      +
   1006H  SER      3.8     6.2    +      -       -      -
   1007H  SER      3.5     2.0    -      -       -      -
   1008H  ALA*     1.3    85.9    -      -       -      +
   1010H  ILE*     1.3    64.3    +      -       -      -
   1011H  LEU      3.3     3.7    +      -       -      -
   1012H  LEU      4.0     1.6    +      -       -      -
   1013H  LEU*     3.6    17.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1010 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1009H  GLY*     1.3    72.1    -      -       -      -
   1011H  LEU*     1.3    59.4    +      -       -      +
   1013H  LEU*     3.3     8.0    -      -       -      +
   1014H  SER*     2.9    29.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1011 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1009H  GLY*     3.3     1.0    -      -       -      -
   1010H  ILE*     1.3    77.9    -      -       -      +
   1012H  LEU*     1.3    58.2    +      -       -      +
   1014H  SER*     3.2     8.4    +      -       -      -
   1015H  LEU*     3.0    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1012 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1008H  ALA*     4.7    14.6    +      -       +      +
   1009H  GLY      4.0     1.6    +      -       -      -
   1010H  ILE      3.5     0.2    -      -       -      -
   1011H  LEU*     1.3    76.0    -      -       -      +
   1013H  LEU*     1.3    60.1    +      -       -      +
   1015H  LEU*     3.6     9.0    -      -       +      +
   1016H  LEU*     2.9    30.7    +      -       -      +
   1085H  THR*     5.2     6.1    -      -       -      +
   1089H  THR*     4.7    22.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1013 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1005H  LEU*     6.5     1.6    -      -       +      -
   1008H  ALA*     5.9     4.0    -      -       +      +
   1009H  GLY      3.6    13.7    +      -       -      +
   1010H  ILE*     3.3    13.7    +      -       -      +
   1011H  LEU      3.2     0.2    -      -       -      -
   1012H  LEU*     1.3    79.8    -      -       -      +
   1014H  SER*     1.3    56.8    +      -       -      +
   1016H  LEU*     3.2     5.3    +      -       -      +
   1017H  VAL*     2.9    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1014 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1010H  ILE      2.9    14.0    +      -       -      -
   1011H  LEU*     3.2    10.5    +      -       -      -
   1013H  LEU*     1.3    74.3    -      -       -      +
   1015H  LEU*     1.3    63.7    +      -       -      +
   1017H  VAL*     5.0     2.7    -      -       -      -
   1018H  PHE*     3.0    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1015 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1011H  LEU      3.0    13.6    +      -       -      +
   1012H  LEU*     3.6    11.7    -      -       -      +
   1013H  LEU      3.3     0.2    -      -       -      -
   1014H  SER*     1.3    73.9    -      -       -      +
   1016H  LEU*     1.3    58.1    +      -       -      +
   1018H  PHE*     3.9     2.3    -      -       -      +
   1019H  SER*     2.9    32.7    +      -       -      -
   1085H  THR*     5.1     9.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1016 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1012H  LEU      2.9    17.6    +      -       -      +
   1013H  LEU*     3.7     6.3    -      -       -      +
   1015H  LEU*     1.3    76.2    -      -       -      +
   1017H  VAL*     1.3    57.1    +      -       -      +
   1019H  SER*     3.3     3.5    +      -       -      -
   1020H  GLN*     2.9    31.6    +      -       -      +
   1082H  THR*     5.0     6.1    -      -       -      +
   1085H  THR*     4.5    22.0    -      -       -      -
   1086H  VAL*     5.5     2.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1017 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1013H  LEU      2.9    16.4    +      -       -      +
   1014H  SER*     4.4     2.5    -      -       -      +
   1016H  LEU*     1.3    77.5    -      -       -      +
   1018H  PHE*     1.3    58.7    +      -       -      +
   1020H  GLN*     3.8     5.4    -      -       -      +
   1021H  LEU*     3.0    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1018 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1014H  SER      3.0    20.0    +      -       -      +
   1015H  LEU*     4.2     2.0    -      -       -      +
   1017H  VAL*     1.3    78.5    -      -       -      +
   1019H  SER*     1.3    56.2    +      -       -      +
   1021H  LEU*     3.6     5.3    +      -       -      +
   1022H  LEU*     2.9    28.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1019 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1015H  LEU      2.9    21.0    +      -       -      -
   1016H  LEU*     3.8     4.3    -      -       -      -
   1018H  PHE*     1.3    74.8    -      -       -      +
   1020H  GLN*     1.3    60.5    +      -       -      +
   1022H  LEU*     3.3     7.5    -      -       -      +
   1023H  LYS*     2.9    29.8    +      -       -      +
   1081H  VAL*     4.8    11.7    -      -       -      -
   1082H  THR*     4.6    21.4    -      -       -      -
   1085H  THR*     6.0     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN1020 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1016H  LEU      2.9    18.7    +      -       -      +
   1017H  VAL*     3.8     5.6    -      -       -      +
   1019H  SER*     1.3    73.4    -      -       -      +
   1021H  LEU*     1.3    59.2    +      -       -      +
   1023H  LYS*     3.4     3.8    +      -       -      +
   1024H  HIS*     2.9    31.4    +      -       -      +
   1082H  THR*     4.7    13.6    -      -       -      -
   1144H  SER*     5.9     3.8    -      -       -      +
   1148H  LEU*     4.0    21.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1021 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1017H  VAL      3.0    17.4    +      -       -      +
   1018H  PHE*     4.0     5.4    -      -       -      +
   1020H  GLN*     1.3    75.6    -      -       -      +
   1022H  LEU*     1.3    57.5    +      -       -      +
   1024H  HIS*     4.1     4.2    -      -       -      +
   1025H  MET*     2.9    34.1    +      -       -      +
   1148H  LEU*     4.6     7.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1022 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1018H  PHE      2.9    20.1    +      -       -      +
   1019H  SER*     3.3    11.2    -      -       -      +
   1020H  GLN      3.2     0.2    -      -       -      -
   1021H  LEU*     1.3    76.8    -      -       -      +
   1023H  LYS*     1.3    58.2    +      -       -      +
   1025H  MET*     3.8     3.1    -      -       -      +
   1026H  VAL*     2.9    28.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS1023 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1019H  SER      2.9    15.7    +      -       -      +
   1020H  GLN*     4.3     3.4    -      -       -      +
   1022H  LEU*     1.3    76.2    -      -       -      +
   1024H  HIS*     1.3    58.5    +      -       -      +
   1026H  VAL*     3.3     8.8    +      -       -      +
   1027H  LEU*     2.9    27.0    +      -       -      +
   1077H  VAL      5.6     0.7    -      -       -      +
   1078H  LEU*     4.6    24.0    -      -       +      +
   1079H  CYS      4.9     9.2    -      -       -      +
   1082H  THR*     6.3     2.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS1024 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1020H  GLN      2.9    19.2    +      -       -      +
   1021H  LEU*     4.1     4.3    -      -       -      +
   1023H  LYS*     1.3    75.2    -      -       -      +
   1025H  MET*     1.3    59.9    +      -       -      +
   1027H  LEU*     3.1     8.5    +      -       -      +
   1028H  VAL*     3.0    26.6    +      -       -      +
   1148H  LEU*     4.4    22.7    -      -       +      -
   1149H  LEU*     6.2     4.3    -      -       +      -
   1152H  SER*     4.4    15.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET1025 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1021H  LEU      2.9    18.9    +      -       -      +
   1022H  LEU*     4.0     3.1    -      -       -      +
   1024H  HIS*     1.3    73.0    -      -       -      +
   1026H  VAL*     1.3    60.7    +      -       -      +
   1028H  VAL*     3.6     9.0    -      -       +      +
   1029H  ALA*     2.8    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1026 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1022H  LEU      2.9    18.6    +      -       -      +
   1023H  LYS*     3.5    10.1    -      -       -      +
   1024H  HIS      3.2     0.2    -      -       -      -
   1025H  MET*     1.3    77.1    -      -       -      +
   1027H  LEU*     1.3    57.6    +      -       -      +
   1029H  ALA*     3.2     5.6    +      -       -      +
   1030H  ILE*     2.8    29.7    +      -       -      +
   1074H  LEU*     4.8    13.0    -      -       +      +
   1077H  VAL*     4.7    19.1    -      -       +      -
   1078H  LEU*     5.2     7.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1027 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    552H  ILE*     5.1    17.3    -      -       +      -
   1023H  LYS      2.9    12.9    +      -       -      +
   1024H  HIS*     3.1    11.4    +      -       -      +
   1026H  VAL*     1.3    77.0    -      -       -      +
   1028H  VAL*     1.3    62.0    +      -       -      +
   1030H  ILE*     3.2     9.1    +      -       -      +
   1031H  ASP*     3.1    22.7    +      -       -      +
   1149H  LEU*     6.0     6.7    -      -       +      -
   1287H  TYR*     4.4     5.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1028 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1024H  HIS      3.0    12.8    +      -       -      +
   1025H  MET*     3.6    12.1    -      -       +      +
   1027H  LEU*     1.3    75.1    -      -       -      +
   1029H  ALA*     1.3    58.5    +      -       -      +
   1031H  ASP*     3.2     4.7    +      -       -      +
   1032H  TYR*     2.9    28.4    +      -       -      +
   1152H  SER*     5.2    12.3    -      -       -      +
   1156H  VAL*     5.1    16.3    -      -       +      +
   1287H  TYR*     4.6     9.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1029 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1025H  MET      2.8    19.0    +      -       -      +
   1026H  VAL*     3.7     7.0    -      -       -      +
   1028H  VAL*     1.3    73.4    -      -       -      +
   1030H  ILE*     1.3    60.8    +      -       -      +
   1032H  TYR*     3.7     8.0    -      -       -      +
   1033H  TRP*     2.9    32.1    +      -       -      +
   1074H  LEU*     5.6     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1030 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    552H  ILE*     5.9     6.3    -      -       +      -
   1026H  VAL      2.8    14.2    +      -       -      +
   1027H  LEU*     3.2    13.2    +      -       -      +
   1029H  ALA*     1.3    76.4    -      -       -      +
   1031H  ASP*     1.3    57.7    +      -       -      +
   1033H  TRP*     3.9     2.3    -      -       -      +
   1034H  LEU*     2.9    28.5    +      -       -      +
   1071H  LEU*     5.7     9.5    -      -       +      +
   1074H  LEU*     4.9    18.1    -      -       +      +
   1075H  GLY*     5.8     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1031 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    580H  LEU*     5.6     6.3    -      -       +      -
   1027H  LEU      3.1     9.2    +      -       -      +
   1028H  VAL*     3.2     6.0    +      -       -      +
   1030H  ILE*     1.3    77.6    -      -       -      +
   1032H  TYR*     1.3    57.9    +      -       -      +
   1034H  LEU*     3.3     8.4    +      -       -      +
   1035H  ALA      2.9    22.5    +      -       -      -
   1156H  VAL*     6.5     0.4    -      -       +      -
   1283H  LEU*     3.3    33.7    -      -       +      +
   1287H  TYR*     3.7    24.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR1032 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1028H  VAL      2.9    16.9    +      -       -      +
   1029H  ALA*     3.7     9.2    -      -       -      +
   1031H  ASP*     1.3    77.8    -      -       -      +
   1033H  TRP*     1.3    57.4    +      -       -      +
   1035H  ALA*     3.1     6.2    +      -       -      +
   1036H  LYS*     2.9    25.1    +      -       -      +
   1283H  LEU*     4.4     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP1033 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1029H  ALA      2.9    17.5    +      -       -      +
   1030H  ILE*     4.4     2.0    -      -       -      +
   1032H  TYR*     1.3    73.0    -      -       -      +
   1034H  LEU*     1.3    60.4    +      -       -      +
   1036H  LYS*     3.7     8.9    -      -       +      +
   1037H  TRP*     2.8    26.7    +      -       -      +
   1067H  VAL*     5.1    14.8    -      -       +      +
   1070H  LEU*     5.8     6.5    -      -       +      -
   1071H  LEU*     5.9     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1034 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    576H  ALA*     6.6     0.2    -      -       +      -
    577H  PHE*     4.5    16.1    -      -       +      -
   1030H  ILE      2.9    19.7    +      -       -      +
   1031H  ASP*     3.3    10.8    -      -       -      +
   1032H  TYR      3.1     0.2    -      -       -      -
   1033H  TRP*     1.3    75.9    -      -       -      +
   1035H  ALA*     1.3    58.9    +      -       -      +
   1037H  TRP*     3.2     7.6    +      -       -      +
   1038H  THR*     3.0    29.5    +      -       -      -
   1071H  LEU*     6.1     2.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1035 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    577H  PHE*     4.2     8.0    -      -       -      -
   1031H  ASP      2.9     6.7    +      -       -      -
   1032H  TYR*     3.1     8.9    +      -       -      +
   1034H  LEU*     1.3    76.4    -      -       -      +
   1036H  LYS*     1.3    61.7    +      -       -      +
   1038H  THR*     3.3     1.8    +      -       -      +
   1039H  ASP*     3.3    27.0    +      -       -      +
   1279H  GLY*     4.1    21.7    -      -       -      -
   1280H  LEU*     4.5    10.5    -      -       +      +
   1283H  LEU*     3.7    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS1036 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1032H  TYR      2.9    15.9    +      -       -      +
   1033H  TRP*     4.1     8.1    -      -       -      +
   1035H  ALA*     1.3    73.2    -      -       -      +
   1037H  TRP*     1.3    65.6    +      -       -      +
   1039H  ASP*     4.3     9.4    -      -       -      +
   1067H  VAL*     5.9     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP1037 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571H  LEU*     6.3     2.2    -      -       +      -
   1033H  TRP      2.8    16.1    +      -       -      +
   1034H  LEU*     3.2    13.0    -      -       -      +
   1035H  ALA      3.1     0.2    -      -       -      -
   1036H  LYS*     1.3    80.7    -      -       -      +
   1038H  THR*     1.3    64.8    +      -       -      +
   1039H  ASP      3.2     7.8    +      -       -      +
   1067H  VAL*     5.1    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR1038 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571H  LEU*     3.2    31.8    -      -       -      +
    572H  SER*     4.0     2.9    -      -       -      -
    573H  PRO*     3.6    37.9    -      -       -      +
    576H  ALA*     5.3     5.2    -      -       -      -
    577H  PHE*     5.5     2.9    -      -       -      -
   1034H  LEU      3.0    12.6    +      -       -      -
   1035H  ALA*     3.3     3.7    +      -       -      -
   1037H  TRP*     1.3    79.6    -      -       -      +
   1039H  ASP*     1.3    60.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1039 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    573H  PRO*     4.6     4.1    -      -       +      +
   1035H  ALA      3.3    14.6    +      -       -      +
   1036H  LYS*     4.3     7.7    -      -       -      +
   1037H  TRP      3.2    10.0    +      -       -      +
   1038H  THR*     1.3    82.8    -      -       -      +
   1277H  SER*     4.5    21.3    -      -       -      +
   1278H  ALA*     5.6     2.2    -      -       +      +
   1279H  GLY*     5.2     6.5    -      -       -      +
----------------------------------------------------------
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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