Contacts of the helix formed by residues 1008 - 1034 (chain E) in PDB entry 6C3P


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 GLY1008 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1006E  SER      4.2     0.6    +      -       -      -
   1007E  ALA*     1.3    75.4    -      -       -      +
   1009E  ILE*     1.3    66.5    +      -       -      -
   1010E  LEU*     3.0     5.4    -      -       -      -
   1011E  LEU*     2.9    30.2    +      -       -      +
   1012E  LEU*     3.3     6.8    +      -       -      +
   1091E  LYS*     5.0     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1009 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1007E  ALA      3.6     2.0    +      -       -      -
   1008E  GLY*     1.3    71.8    -      -       -      -
   1010E  LEU*     1.3    62.0    +      -       +      +
   1012E  LEU*     2.9    30.0    +      -       +      +
   1013E  SER*     3.0    13.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1010 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1008E  GLY*     3.0     2.4    -      -       -      -
   1009E  ILE*     1.3    85.9    -      -       +      +
   1011E  LEU*     1.3    58.4    +      -       +      +
   1013E  SER*     3.6     8.4    -      -       -      -
   1014E  LEU*     2.9    39.6    +      -       +      +
   1087E  TRP*     5.4    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1011 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1007E  ALA*     3.6    16.8    -      -       +      -
   1008E  GLY*     2.9    19.3    +      -       -      +
   1010E  LEU*     1.3    78.5    -      -       +      +
   1012E  LEU*     1.3    58.3    +      -       +      +
   1014E  LEU*     4.1     4.2    -      -       +      +
   1015E  LEU*     2.9    34.4    +      -       -      +
   1084E  THR*     4.0    18.0    -      -       +      +
   1087E  TRP*     3.4    33.0    -      -       +      -
   1088E  THR*     3.5    40.3    -      -       -      +
   1091E  LYS*     3.6    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1012 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1004E  LEU*     3.5    68.4    -      -       +      +
   1007E  ALA*     4.8     3.4    -      -       +      -
   1008E  GLY      3.6    11.0    -      -       -      +
   1009E  ILE*     2.9    20.0    +      -       +      +
   1011E  LEU*     1.3    76.8    -      -       +      +
   1013E  SER*     1.3    63.6    +      -       -      +
   1015E  LEU*     3.9     9.5    -      -       +      +
   1016E  VAL*     3.0    39.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER1013 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1009E  ILE*     3.0    11.3    +      -       -      -
   1010E  LEU*     3.6    13.9    -      -       -      -
   1011E  LEU      3.3     0.2    -      -       -      -
   1012E  LEU*     1.3    77.2    -      -       -      +
   1014E  LEU*     1.3    64.5    +      -       -      +
   1016E  VAL*     3.9     2.0    -      -       -      -
   1017E  PHE*     2.9    49.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1014 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1010E  LEU*     2.9    33.8    +      -       +      +
   1011E  LEU*     4.1     4.9    -      -       +      +
   1012E  LEU      3.4     0.2    -      -       -      -
   1013E  SER*     1.3    72.4    -      -       -      +
   1015E  LEU*     1.3    55.8    +      -       -      +
   1017E  PHE*     3.9     4.8    -      -       +      +
   1018E  SER*     2.4    45.1    +      -       -      +
   1080E  VAL*     4.1    17.3    -      -       +      -
   1084E  THR*     3.2    33.7    -      -       +      +
   1087E  TRP*     5.8     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1015 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1011E  LEU      2.9    18.6    +      -       -      +
   1012E  LEU*     3.9     9.9    -      -       +      +
   1014E  LEU*     1.3    77.8    -      -       -      +
   1016E  VAL*     1.3    76.6    +      -       +      +
   1018E  SER*     3.2     4.3    +      -       -      -
   1019E  GLN*     3.0    43.5    +      -       +      +
   1081E  THR*     5.4     0.8    -      -       -      +
   1084E  THR*     3.7    12.9    -      -       +      +
   1085E  VAL*     4.8    17.0    -      -       +      -
   1088E  THR*     4.2    24.7    -      -       +      +
   1139E  LEU*     4.5    21.1    -      -       +      -
   1143E  SER*     5.1     4.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1016 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1012E  LEU*     3.0    29.7    +      -       +      +
   1013E  SER*     4.0     2.7    -      -       -      +
   1015E  LEU*     1.3    88.1    -      -       +      +
   1017E  PHE*     1.3    68.0    +      -       +      +
   1019E  GLN*     3.4     3.1    +      -       -      +
   1020E  LEU*     3.0    45.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE1017 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1013E  SER*     2.9    46.6    +      -       -      +
   1014E  LEU*     4.1     5.6    -      -       +      +
   1016E  VAL*     1.3    80.2    -      -       +      +
   1018E  SER*     1.3    62.9    +      -       -      +
   1020E  LEU*     4.7     7.9    -      -       +      -
   1021E  LEU*     2.9    50.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER1018 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1014E  LEU*     2.4    41.6    +      -       -      +
   1015E  LEU*     3.5     6.3    -      -       -      -
   1017E  PHE*     1.3    75.0    -      -       -      +
   1019E  GLN*     1.3    65.8    +      -       -      +
   1022E  LYS*     2.8    27.5    +      -       -      +
   1077E  LEU*     4.0    11.0    -      -       -      +
   1080E  VAL*     4.0    11.7    -      -       -      +
   1081E  THR*     3.3    32.9    +      -       -      -
   1084E  THR*     4.2     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN1019 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1015E  LEU*     3.0    31.4    +      -       +      +
   1016E  VAL*     3.9     4.3    -      -       -      +
   1018E  SER*     1.3    75.9    -      -       -      +
   1020E  LEU*     1.3    66.8    +      -       +      +
   1022E  LYS*     3.3     4.5    -      -       -      +
   1023E  HIS*     3.0    48.5    +      -       -      +
   1081E  THR*     3.1    26.0    -      -       -      +
   1085E  VAL*     4.3    14.5    -      -       -      +
   1140E  GLU*     5.7     3.0    +      -       -      +
   1143E  SER*     3.0    35.0    +      -       -      +
   1144E  ARG*     4.2     4.9    +      -       -      +
   1147E  LEU*     4.2    12.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1020 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1016E  VAL*     3.0    40.8    +      -       +      +
   1017E  PHE*     4.0     7.2    -      -       +      +
   1019E  GLN*     1.3    78.5    -      -       +      +
   1021E  LEU*     1.3    67.3    +      -       +      +
   1023E  HIS*     4.5     0.3    -      -       -      +
   1024E  MET*     2.9    45.6    +      -       +      +
   1147E  LEU*     3.9    28.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1021 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1017E  PHE*     2.9    44.1    +      -       +      +
   1020E  LEU*     1.3    75.9    -      -       +      +
   1022E  LYS*     1.3    64.9    +      -       -      +
   1024E  MET*     4.5     9.6    -      -       +      -
   1025E  VAL*     2.9    33.0    +      -       +      +
   1077E  LEU*     3.5    21.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS1022 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    548E  THR*     3.4    24.8    -      -       -      +
   1018E  SER      2.8    19.6    +      -       -      +
   1019E  GLN*     3.3     5.2    -      -       -      +
   1021E  LEU*     1.3    79.0    -      -       -      +
   1023E  HIS*     1.3    93.1    +      -       +      +
   1025E  VAL*     3.1     3.8    +      -       -      +
   1026E  LEU*     2.9    40.2    +      -       +      +
   1074E  GLY*     4.8     3.4    +      -       -      +
   1077E  LEU*     3.3    16.7    -      -       +      +
   1078E  CYS*     3.5    41.6    -      -       +      +
   1081E  THR*     3.7    25.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS1023 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    548E  THR*     5.3     1.2    -      -       -      +
   1019E  GLN*     3.0    27.0    +      -       -      -
   1022E  LYS*     1.3   115.7    +      -       +      +
   1024E  MET*     1.3    61.7    +      -       -      +
   1026E  LEU*     3.2    16.9    +      -       +      +
   1027E  VAL*     2.9    33.1    +      -       -      +
   1144E  ARG*     4.0    13.7    -      -       +      -
   1147E  LEU*     3.5    36.4    -      -       +      +
   1148E  LEU*     3.2    41.1    -      -       +      +
   1151E  SER*     5.2     3.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET1024 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1020E  LEU*     2.9    39.3    +      -       +      +
   1021E  LEU*     4.0    10.5    -      -       +      +
   1023E  HIS*     1.3    78.9    -      -       -      +
   1025E  VAL*     1.3    57.1    +      -       +      +
   1027E  VAL*     3.5     8.3    +      -       -      +
   1028E  ALA*     2.8    27.4    +      -       -      +
   1147E  LEU*     5.5     5.2    -      -       +      -
   1151E  SER*     6.1     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL1025 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1021E  LEU*     2.9    27.8    +      -       +      +
   1022E  LYS*     3.4     5.4    -      -       -      +
   1024E  MET*     1.3    76.5    -      -       +      +
   1026E  LEU*     1.3    59.1    +      -       -      +
   1028E  ALA*     3.9     7.9    -      -       +      -
   1029E  ILE*     2.8    32.1    +      -       +      +
   1070E  LEU*     4.1    24.2    -      -       +      +
   1073E  LEU*     3.6    36.6    -      -       +      -
   1074E  GLY*     4.3     9.9    -      -       -      +
   1077E  LEU*     4.6     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1026 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    552E  ILE*     3.9    27.1    -      -       +      -
    584E  HIS*     6.0     6.3    -      -       +      -
   1022E  LYS*     2.9    45.1    +      -       +      +
   1023E  HIS*     3.2    26.2    +      -       +      +
   1025E  VAL*     1.3    75.5    -      -       +      +
   1027E  VAL*     1.3    53.4    +      -       +      +
   1029E  ILE*     3.0    23.9    -      -       +      +
   1030E  ASP*     2.6    30.4    -      -       -      +
   1074E  GLY*     5.1    13.2    -      -       -      +
   1148E  LEU*     5.6     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL1027 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1023E  HIS      2.9    19.9    +      -       -      +
   1024E  MET*     3.7     7.4    -      -       -      +
   1026E  LEU*     1.3    75.7    -      -       +      +
   1028E  ALA*     1.3    63.5    +      -       -      +
   1030E  ASP*     2.6    20.3    -      -       -      +
   1031E  TYR*     2.9    27.2    +      -       +      +
   1148E  LEU*     6.2     2.0    -      -       +      -
   1151E  SER*     3.9    27.1    -      -       -      +
   1152E  ALA*     5.4     0.7    -      -       -      +
   1155E  VAL*     3.5    30.5    -      -       +      -
   1286E  TYR*     4.8     6.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1028 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1024E  MET      2.8    22.9    +      -       -      +
   1025E  VAL*     3.2    11.6    +      -       +      +
   1027E  VAL*     1.3    74.8    -      -       -      +
   1029E  ILE*     1.3    57.6    +      -       -      +
   1031E  TYR*     3.8     2.8    -      -       -      +
   1032E  TRP*     2.9    36.4    +      -       -      +
   1070E  LEU*     4.4     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1029 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    552E  ILE*     6.2     2.9    -      -       +      -
    555E  VAL*     6.2     1.1    -      -       +      -
   1025E  VAL*     2.8    21.5    +      -       +      +
   1026E  LEU*     3.0    35.0    -      -       +      +
   1028E  ALA*     1.3    73.3    -      -       -      +
   1030E  ASP*     1.3    61.4    +      -       +      +
   1032E  TRP*     3.6     2.8    -      -       -      +
   1033E  LEU*     2.8    24.3    +      -       -      +
   1067E  PHE*     3.6    26.0    -      -       +      +
   1070E  LEU*     3.6    25.3    -      -       +      +
   1071E  CYS*     3.3    53.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1030 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    577E  PHE*     5.4     4.5    -      -       +      -
    580E  LEU*     4.3    25.4    -      -       +      -
    584E  HIS*     4.3    13.5    +      -       -      -
   1026E  LEU*     2.6    22.5    +      -       -      +
   1027E  VAL*     2.6    32.2    -      -       -      +
   1029E  ILE*     1.3    75.2    -      -       +      +
   1031E  TYR*     1.3    61.9    +      -       -      -
   1032E  TRP      3.0     1.6    -      -       -      -
   1033E  LEU*     3.0    11.7    +      -       +      +
   1034E  ALA      3.0    21.7    +      -       -      -
   1067E  PHE*     5.5     0.7    -      -       -      -
   1282E  LEU*     3.8     6.5    -      -       -      +
   1286E  TYR*     2.5    33.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR1031 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1027E  VAL*     2.9    25.0    +      -       +      +
   1028E  ALA*     4.2     2.5    -      -       -      +
   1030E  ASP*     1.3    82.6    +      -       -      +
   1032E  TRP*     1.3    59.0    +      -       +      +
   1034E  ALA*     3.0    18.9    -      -       +      +
   1035E  LYS*     3.8    13.8    +      -       +      +
   1155E  VAL*     4.7     5.2    -      -       +      -
   1158E  TYR*     3.1    33.7    +      +       -      -
   1159E  VAL*     3.8    22.2    -      -       +      -
   1279E  LEU*     3.6    29.8    -      -       +      +
   1282E  LEU*     3.4    32.5    -      -       +      -
   1286E  TYR*     5.0     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP1032 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1028E  ALA      2.9    20.8    +      -       -      +
   1029E  ILE*     3.7     1.6    -      -       -      +
   1031E  TYR*     1.3    77.8    -      -       +      +
   1033E  LEU*     1.3    59.3    +      -       -      +
   1034E  ALA      3.1     1.1    -      -       -      -
   1035E  LYS*     3.0    57.8    +      -       +      +
   1036E  TRP*     3.3     7.8    +      +       +      +
   1063E  TYR*     3.0    57.0    -      +       +      -
   1066E  VAL*     3.3    24.0    -      -       +      -
   1067E  PHE*     3.3    42.0    -      +       +      -
   1070E  LEU*     4.1    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1033 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    559E  PHE*     3.6    35.2    -      -       +      -
    576E  ALA*     4.8    10.5    -      -       +      -
    577E  PHE*     4.8    14.4    -      -       +      -
    580E  LEU*     3.7    17.9    -      -       +      -
   1029E  ILE      2.8    14.6    +      -       -      +
   1030E  ASP*     3.1    14.1    -      -       -      +
   1032E  TRP*     1.3    74.9    -      -       -      +
   1034E  ALA*     1.3    58.7    +      -       -      -
   1036E  TRP*     2.7    57.3    +      -       +      +
   1037E  THR*     3.2    13.0    +      -       +      +
   1067E  PHE*     3.9    27.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1034 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    577E  PHE*     6.2     1.7    -      -       -      -
   1030E  ASP      3.0     7.1    +      -       -      -
   1031E  TYR*     3.0    19.5    -      -       +      +
   1032E  TRP      3.1     0.4    -      -       -      -
   1033E  LEU*     1.3    77.9    -      -       -      +
   1035E  LYS*     1.3    56.8    +      -       +      +
   1037E  THR*     2.9    26.0    +      -       -      -
   1038E  ASP*     4.1     5.2    -      -       -      +
   1276E  SER*     6.0     0.7    -      -       -      -
   1278E  GLY*     4.7     9.3    -      -       -      +
   1279E  LEU*     4.2    27.1    -      -       +      +
   1282E  LEU*     3.6    23.5    -      -       +      +
----------------------------------------------------------
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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