Contacts of the helix formed by residues 1009 - 1039 (chain G) 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 G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1005G  LEU      3.0    12.6    +      -       -      +
   1006G  SER*     3.8     6.8    +      -       -      -
   1007G  SER      3.5     1.4    -      -       -      -
   1008G  ALA*     1.3    86.0    -      -       -      +
   1010G  ILE*     1.3    64.2    +      -       -      -
   1011G  LEU*     3.3     3.8    +      -       -      -
   1012G  LEU      4.0     1.2    +      -       -      -
   1013G  LEU*     3.6    17.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1010 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1009G  GLY*     1.3    72.8    -      -       -      -
   1011G  LEU*     1.3    59.4    +      -       -      +
   1013G  LEU*     3.3     7.6    -      -       -      +
   1014G  SER*     2.9    29.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1011 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1009G  GLY      3.3     1.0    -      -       -      -
   1010G  ILE*     1.3    78.8    -      -       -      +
   1012G  LEU*     1.3    58.4    +      -       -      +
   1014G  SER*     3.2     9.0    +      -       -      -
   1015G  LEU*     3.0    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1012 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1008G  ALA*     4.7    14.1    +      -       +      +
   1009G  GLY      4.0     1.2    +      -       -      -
   1010G  ILE      3.5     0.2    -      -       -      -
   1011G  LEU*     1.3    75.7    -      -       -      +
   1013G  LEU*     1.3    60.7    +      -       -      +
   1015G  LEU*     3.6     8.6    -      -       +      +
   1016G  LEU*     2.9    30.7    +      -       -      +
   1085G  THR*     5.2     5.7    -      -       -      +
   1089G  THR*     4.7    21.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1013 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1005G  LEU*     6.5     1.1    -      -       +      -
   1008G  ALA*     5.9     3.1    -      -       +      +
   1009G  GLY      3.6    14.3    +      -       -      +
   1010G  ILE*     3.3    13.2    -      -       -      +
   1011G  LEU      3.2     0.2    -      -       -      -
   1012G  LEU*     1.3    78.6    -      -       -      +
   1014G  SER*     1.3    56.6    +      -       -      +
   1016G  LEU*     3.2     4.8    +      -       -      +
   1017G  VAL*     2.9    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1014 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1010G  ILE      2.9    14.0    +      -       -      -
   1011G  LEU*     3.2    11.0    +      -       -      -
   1013G  LEU*     1.3    75.0    -      -       -      +
   1015G  LEU*     1.3    64.1    +      -       -      +
   1017G  VAL*     4.4     2.4    -      -       -      +
   1018G  PHE*     3.0    29.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1015 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1011G  LEU      3.0    12.9    +      -       -      +
   1012G  LEU*     3.6    11.4    -      -       -      +
   1014G  SER*     1.3    75.9    -      -       -      +
   1016G  LEU*     1.3    57.8    +      -       -      +
   1018G  PHE*     4.1     2.1    -      -       -      +
   1019G  SER*     2.9    33.2    +      -       -      -
   1085G  THR*     5.1     9.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1016 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1012G  LEU      2.9    18.8    +      -       -      +
   1013G  LEU*     3.7     5.6    -      -       -      +
   1015G  LEU*     1.3    76.6    -      -       -      +
   1017G  VAL*     1.3    58.1    +      -       -      +
   1019G  SER*     3.3     3.6    +      -       -      -
   1020G  GLN*     2.9    31.3    +      -       -      +
   1082G  THR*     5.0     6.6    -      -       -      +
   1085G  THR*     4.5    21.5    -      -       -      -
   1086G  VAL*     5.5     2.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1017 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1013G  LEU      2.9    16.6    +      -       -      +
   1014G  SER*     4.4     2.9    -      -       -      +
   1016G  LEU*     1.3    76.1    -      -       -      +
   1018G  PHE*     1.3    58.4    +      -       -      +
   1020G  GLN*     3.8     4.7    -      -       -      +
   1021G  LEU*     3.0    31.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1018 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1014G  SER      3.0    20.2    +      -       -      +
   1015G  LEU*     4.2     2.5    -      -       -      +
   1017G  VAL*     1.3    78.6    -      -       -      +
   1019G  SER*     1.3    56.4    +      -       -      +
   1021G  LEU*     3.6     4.8    +      -       -      +
   1022G  LEU*     2.9    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1019 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1015G  LEU      2.9    21.9    +      -       -      -
   1016G  LEU*     3.8     4.3    -      -       -      -
   1018G  PHE*     1.3    73.6    -      -       -      +
   1020G  GLN*     1.3    61.3    +      -       -      +
   1022G  LEU*     3.3     8.0    -      -       -      +
   1023G  LYS*     2.9    30.0    +      -       -      +
   1081G  VAL*     4.8    11.2    -      -       -      -
   1082G  THR*     4.6    21.2    -      -       -      -
   1085G  THR*     6.0     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN1020 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1016G  LEU      2.9    17.4    +      -       -      +
   1017G  VAL*     3.8     6.1    -      -       -      +
   1019G  SER*     1.3    75.2    -      -       -      +
   1021G  LEU*     1.3    60.1    +      -       -      +
   1023G  LYS*     3.4     3.4    +      -       -      +
   1024G  HIS*     2.9    31.7    +      -       -      +
   1082G  THR*     4.7    14.1    -      -       -      -
   1144G  SER*     5.9     3.8    -      -       -      +
   1148G  LEU*     4.0    21.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1021 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1017G  VAL      3.0    17.7    +      -       -      +
   1018G  PHE*     4.0     4.9    -      -       -      +
   1020G  GLN*     1.3    76.0    -      -       -      +
   1022G  LEU*     1.3    57.1    +      -       -      +
   1024G  HIS*     4.1     4.8    -      -       -      +
   1025G  MET*     2.9    33.8    +      -       -      +
   1148G  LEU*     4.6     7.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1022 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1018G  PHE      2.9    19.7    +      -       -      +
   1019G  SER*     3.3    10.5    -      -       -      +
   1020G  GLN      3.2     0.2    -      -       -      -
   1021G  LEU*     1.3    77.0    -      -       -      +
   1023G  LYS*     1.3    57.5    +      -       -      +
   1025G  MET*     3.8     2.9    -      -       -      +
   1026G  VAL*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS1023 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1019G  SER      2.9    15.1    +      -       -      +
   1020G  GLN*     4.3     3.6    -      -       -      +
   1022G  LEU*     1.3    75.9    -      -       -      +
   1024G  HIS*     1.3    58.1    +      -       -      +
   1026G  VAL*     3.3     8.9    +      -       -      +
   1027G  LEU*     2.9    26.5    +      -       -      +
   1077G  VAL      5.6     0.4    -      -       -      +
   1078G  LEU*     4.6    25.1    -      -       +      +
   1079G  CYS      4.9     8.7    -      -       -      +
   1082G  THR*     6.3     2.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS1024 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1020G  GLN      2.9    18.3    +      -       -      +
   1021G  LEU*     4.1     4.0    -      -       -      +
   1023G  LYS*     1.3    74.8    -      -       -      +
   1025G  MET*     1.3    60.7    +      -       -      +
   1027G  LEU*     3.1     8.4    +      -       -      +
   1028G  VAL*     3.0    26.6    +      -       -      +
   1148G  LEU*     4.4    23.8    -      -       +      +
   1149G  LEU*     6.2     4.3    -      -       +      -
   1152G  SER*     4.4    15.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET1025 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1021G  LEU      2.9    18.8    +      -       -      +
   1022G  LEU*     4.0     2.9    -      -       -      +
   1024G  HIS*     1.3    74.2    -      -       -      +
   1026G  VAL*     1.3    61.0    +      -       -      +
   1028G  VAL*     3.6     9.0    -      -       +      +
   1029G  ALA*     2.9    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1026 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1022G  LEU      2.9    18.3    +      -       -      +
   1023G  LYS*     3.5    10.8    -      -       -      +
   1024G  HIS      3.2     0.2    -      -       -      -
   1025G  MET*     1.3    75.5    -      -       -      +
   1027G  LEU*     1.3    57.4    +      -       -      +
   1029G  ALA*     3.2     6.2    +      -       -      +
   1030G  ILE*     2.8    29.5    +      -       -      +
   1074G  LEU*     4.8    12.9    -      -       +      +
   1077G  VAL*     4.7    19.5    -      -       +      -
   1078G  LEU*     5.2     6.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1027 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    552G  ILE*     5.1    15.9    -      -       +      -
   1023G  LYS      2.9    14.0    +      -       -      +
   1024G  HIS*     3.1    11.0    +      -       -      +
   1026G  VAL*     1.3    76.2    -      -       -      +
   1028G  VAL*     1.3    62.6    +      -       -      +
   1030G  ILE*     3.2     9.1    +      -       -      +
   1031G  ASP*     3.1    22.5    +      -       -      +
   1149G  LEU*     6.0     6.5    -      -       +      -
   1287G  TYR*     4.4     4.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1028 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1024G  HIS      3.0    13.9    +      -       -      +
   1025G  MET*     3.6    12.1    -      -       -      +
   1027G  LEU*     1.3    74.9    -      -       -      +
   1029G  ALA*     1.3    57.6    +      -       -      +
   1031G  ASP*     3.2     5.1    +      -       -      +
   1032G  TYR*     2.9    29.4    +      -       -      +
   1152G  SER*     5.2    11.6    -      -       -      +
   1156G  VAL*     5.1    15.7    -      -       +      +
   1287G  TYR*     4.6     9.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1029 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1025G  MET      2.9    17.5    +      -       -      +
   1026G  VAL*     3.2     7.4    +      -       -      +
   1028G  VAL*     1.3    73.4    -      -       -      +
   1030G  ILE*     1.3    60.5    +      -       -      +
   1032G  TYR*     3.7     7.7    -      -       -      +
   1033G  TRP*     2.9    32.2    +      -       -      +
   1074G  LEU*     5.6     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1030 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    552G  ILE*     5.9     6.5    -      -       +      -
   1026G  VAL      2.8    13.8    +      -       -      +
   1027G  LEU*     3.2    12.8    +      -       -      +
   1029G  ALA*     1.3    76.1    -      -       -      +
   1031G  ASP*     1.3    58.6    +      -       -      +
   1033G  TRP*     3.6     2.9    +      -       -      +
   1034G  LEU*     2.9    28.3    +      -       -      +
   1071G  LEU*     5.7     8.6    -      -       +      +
   1074G  LEU*     4.9    17.6    -      -       +      +
   1075G  GLY*     5.8     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1031 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    580G  LEU*     5.6     5.6    -      -       +      -
   1027G  LEU      3.1     8.5    +      -       -      +
   1028G  VAL      3.2     6.5    +      -       -      +
   1030G  ILE*     1.3    76.7    -      -       -      +
   1032G  TYR*     1.3    56.8    +      -       -      +
   1034G  LEU*     3.3     9.0    +      -       -      +
   1035G  ALA      2.9    22.5    +      -       -      -
   1156G  VAL*     6.5     0.2    -      -       +      -
   1283G  LEU*     3.3    33.9    -      -       +      +
   1287G  TYR*     3.7    25.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR1032 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1028G  VAL      2.9    16.3    +      -       -      +
   1029G  ALA*     3.7     9.4    -      -       -      +
   1030G  ILE      3.2     0.2    -      -       -      -
   1031G  ASP*     1.3    78.9    -      -       -      +
   1033G  TRP*     1.3    57.4    +      -       -      +
   1035G  ALA*     3.1     6.4    +      -       -      +
   1036G  LYS*     2.9    25.3    +      -       -      +
   1283G  LEU*     4.4     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP1033 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1029G  ALA      2.9    16.5    +      -       -      +
   1030G  ILE*     4.4     2.2    -      -       -      +
   1032G  TYR*     1.3    72.1    -      -       -      +
   1034G  LEU*     1.3    60.6    +      -       -      +
   1036G  LYS*     3.7    10.3    -      -       +      +
   1037G  TRP*     2.8    26.3    +      -       -      +
   1067G  VAL*     5.1    13.9    -      -       +      +
   1070G  LEU*     5.8     7.2    -      -       +      -
   1071G  LEU*     5.9     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1034 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    577G  PHE*     4.5    15.6    -      -       +      -
   1030G  ILE      2.9    20.2    +      -       -      +
   1031G  ASP*     3.3    10.8    -      -       -      +
   1032G  TYR      3.1     0.2    -      -       -      -
   1033G  TRP*     1.3    76.1    -      -       -      +
   1035G  ALA*     1.3    59.2    +      -       -      +
   1037G  TRP*     3.2     8.1    +      -       -      +
   1038G  THR*     3.0    29.1    +      -       -      -
   1071G  LEU*     6.1     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1035 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    577G  PHE*     4.2     8.4    -      -       -      -
   1031G  ASP      2.9     6.7    +      -       -      -
   1032G  TYR*     3.1     8.7    +      -       -      +
   1034G  LEU*     1.3    76.8    -      -       -      +
   1036G  LYS*     1.3    61.6    +      -       -      +
   1038G  THR*     3.3     1.7    +      -       -      +
   1039G  ASP*     3.3    27.0    +      -       -      +
   1279G  GLY*     4.1    22.8    -      -       -      +
   1280G  LEU*     4.5     9.6    -      -       +      +
   1283G  LEU*     3.7    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS1036 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1032G  TYR      2.9    16.1    +      -       -      +
   1033G  TRP*     3.7     8.5    -      -       -      +
   1034G  LEU      3.3     0.2    -      -       -      -
   1035G  ALA*     1.3    72.7    -      -       -      +
   1037G  TRP*     1.3    65.4    +      -       -      +
   1039G  ASP*     4.3     9.6    -      -       -      +
   1067G  VAL*     5.9     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP1037 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571G  LEU*     6.3     2.0    -      -       +      -
   1033G  TRP      2.8    15.7    +      -       -      +
   1034G  LEU*     3.2    13.0    -      -       -      +
   1035G  ALA      3.1     0.2    -      -       -      -
   1036G  LYS*     1.3    80.3    -      -       -      +
   1038G  THR*     1.3    66.3    +      -       -      +
   1039G  ASP      3.2     7.6    +      -       -      +
   1067G  VAL*     5.1    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR1038 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571G  LEU*     3.2    32.2    -      -       -      +
    572G  SER*     4.0     2.4    -      -       -      -
    573G  PRO*     3.6    38.4    -      -       -      +
    576G  ALA*     5.3     5.6    -      -       -      -
    577G  PHE*     5.5     2.0    -      -       -      -
   1034G  LEU      3.0    13.3    +      -       -      -
   1035G  ALA*     3.3     3.7    +      -       -      -
   1037G  TRP*     1.3    80.2    -      -       -      +
   1039G  ASP*     1.3    60.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1039 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    573G  PRO*     4.6     3.9    -      -       -      +
   1035G  ALA      3.3    14.7    +      -       -      +
   1036G  LYS*     4.3     7.9    -      -       -      +
   1037G  TRP      3.2     9.8    +      -       -      +
   1038G  THR*     1.3    80.9    -      -       -      +
   1277G  SER*     4.5    20.9    -      -       -      +
   1278G  ALA*     5.6     2.2    -      -       +      +
   1279G  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