Contacts of the helix formed by residues 1067 - 1091 (chain F) in PDB entry 1NYE


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 ASN1067 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    825E  LYS*     3.0    39.0    +      -       -      +
    878E  ALA*     6.1     0.2    -      -       -      -
   1054F  TYR*     4.6     4.3    -      -       -      -
   1058F  THR      3.4    10.5    -      -       -      +
   1059F  ARG*     4.3     9.4    -      -       +      -
   1065F  GLY      3.4    14.2    -      -       -      +
   1066F  THR*     1.3    78.9    -      -       -      +
   1068F  PRO*     1.3    75.4    -      -       +      +
   1069F  GLU*     3.2    11.1    +      -       -      +
   1070F  GLU*     2.9    41.6    +      -       -      +
   1071F  LEU*     3.3    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO1068 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    875E  ALA*     3.7    22.8    -      -       +      +
    878E  ALA*     4.3     7.4    -      -       +      -
    879E  CYS*     3.8    24.5    -      -       +      +
    947E  VAL*     3.9    15.0    -      -       +      -
   1054F  TYR*     4.6     8.5    -      -       +      -
   1059F  ARG*     2.8    42.0    -      -       -      +
   1067F  ASN*     1.3    84.5    -      -       +      +
   1069F  GLU*     1.3    64.6    +      -       -      +
   1071F  LEU*     3.1     5.1    +      -       +      +
   1072F  ILE*     3.0    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU1069 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    823E  ILE*     6.3     0.7    -      -       +      -
    825E  LYS*     3.5    20.7    +      -       +      -
    946E  PRO*     4.3     3.3    -      -       -      +
    947E  VAL*     4.6     1.4    -      -       -      +
   1059F  ARG*     2.6    40.0    +      -       -      +
   1067F  ASN*     3.2    13.1    +      -       -      +
   1068F  PRO*     1.3    74.7    -      -       -      +
   1070F  GLU*     1.3    53.0    -      -       -      +
   1072F  ILE*     3.1     9.1    +      -       -      +
   1073F  GLY      2.7    31.5    +      -       -      -
   1104F  VAL*     3.6    30.3    -      -       +      +
   1106F  LEU*     4.1    30.6    -      -       +      +
   1115F  ILE*     3.4    22.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1070 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    825E  LYS*     4.2     9.0    -      -       +      -
    826E  LYS      3.6    16.2    -      -       -      +
    827E  GLY*     4.3     2.8    -      -       -      -
    844E  THR*     2.9    30.2    +      -       +      +
    845E  GLU*     3.2    11.5    -      -       +      +
    846E  SER*     2.9    40.7    +      -       -      -
   1065F  GLY      3.7     3.1    -      -       -      +
   1066F  THR*     3.4    22.7    -      -       -      +
   1067F  ASN*     2.9    30.1    -      -       -      +
   1069F  GLU*     1.3    76.9    -      -       -      +
   1071F  LEU*     1.3    62.2    +      -       +      +
   1073F  GLY*     3.2     1.9    +      -       -      -
   1074F  ALA*     3.0    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1071 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    844E  THR*     4.4     7.9    -      -       -      +
    848E  VAL*     5.9     0.7    -      -       +      -
    849E  LEU*     5.3     6.1    -      -       +      -
    871E  LEU*     4.0    20.3    -      -       +      +
    874E  ALA*     4.4    10.5    -      -       +      +
    875E  ALA*     3.9    32.3    -      -       +      +
    878E  ALA*     5.7     0.4    -      -       +      -
   1042F  VAL*     4.4    15.0    -      -       +      -
   1049F  LEU*     4.5    13.2    -      -       +      -
   1066F  THR*     3.4    33.0    -      -       +      -
   1067F  ASN      3.3    13.7    +      -       -      +
   1068F  PRO*     3.1     6.5    +      -       +      +
   1070F  GLU*     1.3    82.3    -      -       -      +
   1072F  ILE*     1.3    58.5    +      -       -      +
   1074F  ALA*     3.4     6.9    +      -       -      +
   1075F  ALA*     3.0    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1072 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    872E  ILE*     5.0    14.8    -      -       +      -
    875E  ALA*     3.6    14.6    -      -       +      -
    947E  VAL*     3.7    37.5    -      -       +      -
    950E  VAL*     6.1     0.9    -      -       +      -
   1068F  PRO      3.0    18.6    +      -       -      +
   1069F  GLU*     3.4     7.4    -      -       -      +
   1071F  LEU*     1.3    74.1    -      -       -      +
   1073F  GLY*     1.3    66.3    +      -       -      +
   1075F  ALA*     3.2     7.0    +      -       -      +
   1076F  HIS*     2.8    23.2    +      -       -      +
   1104F  VAL*     4.7     2.2    -      -       +      -
   1115F  ILE*     4.0    22.4    -      -       +      -
   1118F  ILE*     4.2    22.9    -      -       +      -
   1147F  VAL*     5.1     1.7    -      -       +      +
   1151F  LEU*     4.7    18.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY1073 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    827E  GLY*     4.1     8.5    -      -       -      -
   1069F  GLU      2.7    16.2    +      -       -      -
   1070F  GLU      3.2     2.7    +      -       -      -
   1072F  ILE*     1.3    73.3    -      -       -      +
   1074F  ALA*     1.3    61.7    +      -       -      +
   1076F  HIS*     3.2     2.6    +      -       -      +
   1077F  ALA*     3.0    20.8    +      -       -      +
   1102F  ALA*     3.3    21.1    -      -       -      +
   1104F  VAL*     3.5    22.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1074 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    827E  GLY*     3.8    10.1    -      -       -      -
    828E  GLN      4.3     4.7    -      -       -      +
    829E  ALA*     4.7     0.5    -      -       -      +
    842E  VAL*     4.5     7.2    -      -       +      +
    843E  SER      3.8    18.8    -      -       -      +
    844E  THR*     4.3     7.9    -      -       -      +
    849E  LEU*     4.6    12.3    -      -       +      -
    871E  LEU*     4.7     7.0    -      -       +      -
   1070F  GLU      3.0    12.9    +      -       -      +
   1071F  LEU*     3.7     9.6    -      -       -      +
   1073F  GLY*     1.3    76.7    -      -       -      +
   1075F  ALA*     1.3    63.5    +      -       -      +
   1077F  ALA*     3.3     1.7    +      -       -      +
   1078F  ALA*     2.9    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1075 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    868E  PRO*     3.5    35.1    -      -       +      +
    871E  LEU*     3.8    11.8    -      -       +      +
    872E  ILE*     4.0    17.0    -      -       +      -
   1071F  LEU      3.0    18.1    +      -       -      +
   1072F  ILE      3.6     4.0    -      -       -      +
   1074F  ALA*     1.3    77.0    -      -       -      +
   1076F  HIS*     1.3    53.5    +      -       -      +
   1078F  ALA*     3.3     2.5    +      -       -      +
   1079F  CYS*     2.7    39.2    +      -       -      +
   1147F  VAL*     4.4     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS1076 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1072F  ILE      2.8    19.9    +      -       -      +
   1073F  GLY*     3.6     7.6    -      -       -      +
   1075F  ALA*     1.3    72.0    -      -       -      +
   1077F  ALA*     1.3    53.3    +      -       -      +
   1079F  CYS*     3.6     1.0    -      -       -      +
   1080F  PHE*     2.8    36.3    +      -       -      +
   1102F  ALA*     4.6     1.3    -      -       +      -
   1118F  ILE*     3.0    43.9    -      -       +      +
   1120F  LEU*     4.1    17.0    -      -       +      +
   1145F  CYS*     4.5     2.0    -      -       -      -
   1147F  VAL*     3.5    27.7    -      -       +      +
   1148F  SER*     2.7    32.8    +      -       -      -
   1151F  LEU*     4.1     2.9    -      -       +      -
   1155F  ILE*     3.8    29.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1077 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    828E  GLN*     4.2     4.7    -      -       -      -
    829E  ALA*     3.7    18.8    -      -       +      +
   1073F  GLY      3.0    15.5    +      -       -      +
   1074F  ALA      3.7     4.0    -      -       -      +
   1076F  HIS*     1.3    74.4    -      -       -      +
   1078F  ALA*     1.3    55.0    +      -       -      +
   1080F  PHE*     3.0     5.4    +      -       -      +
   1081F  SER*     2.7    37.8    +      -       -      -
   1100F  THR*     3.5    20.8    +      -       -      +
   1101F  THR      4.7     0.4    -      -       -      -
   1102F  ALA*     4.0    15.8    -      -       +      +
   1120F  LEU*     4.6     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1078 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    829E  ALA*     3.4     5.5    -      -       -      +
    842E  VAL*     3.2    33.9    -      -       +      -
    854E  TYR*     2.8    36.2    +      -       +      -
    868E  PRO*     4.1     9.0    -      -       +      -
    871E  LEU*     5.7     0.7    -      -       +      -
   1074F  ALA      2.9    12.5    +      -       -      +
   1075F  ALA*     3.7     4.5    -      -       -      +
   1077F  ALA*     1.3    75.4    -      -       -      +
   1079F  CYS*     1.3    63.2    +      -       -      +
   1082F  MET*     3.1    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS1079 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    859E  ARG*     3.1    26.2    +      -       -      +
    868E  PRO*     3.7    10.7    -      -       +      +
   1075F  ALA      2.7    21.5    +      -       -      +
   1076F  HIS      3.6     3.4    -      -       -      +
   1078F  ALA*     1.3    75.5    -      -       -      +
   1080F  PHE*     1.3    60.9    +      -       -      +
   1082F  MET*     3.9     2.2    -      -       -      +
   1083F  ALA*     3.0    23.6    +      -       -      +
   1145F  CYS*     3.7    11.0    -      -       -      -
   1146F  PRO*     3.7     9.9    -      -       -      -
   1147F  VAL*     3.4    41.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE1080 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1076F  HIS*     2.8    21.9    +      -       +      +
   1077F  ALA*     3.5     2.9    -      -       -      +
   1079F  CYS*     1.3    72.0    -      -       -      +
   1081F  SER*     1.3    67.1    +      -       -      +
   1083F  ALA*     3.5     1.4    +      -       -      +
   1084F  LEU*     3.1    28.5    +      -       +      +
   1100F  THR*     3.8    31.9    -      -       +      -
   1120F  LEU*     3.8    29.4    -      -       +      -
   1122F  SER*     4.1    12.3    -      -       -      -
   1138F  ILE*     4.0    25.1    -      -       +      -
   1141F  ALA*     3.5    23.1    -      -       +      -
   1142F  LYS*     3.7    26.9    -      -       +      -
   1145F  CYS*     3.9    13.5    -      -       -      -
   1157F  LEU*     4.2    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1081 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    829E  ALA*     3.8     8.4    +      -       -      +
    831E  TRP*     4.2    13.0    -      -       -      +
    854E  TYR*     3.8    13.5    -      -       -      -
   1077F  ALA      2.7    26.2    +      -       -      -
   1080F  PHE*     1.3    77.9    -      -       -      +
   1082F  MET*     1.3    63.2    +      -       -      +
   1084F  LEU*     3.3     6.4    +      -       -      +
   1085F  SER*     3.2    18.5    +      -       -      -
   1098F  ILE*     3.8    24.9    -      -       -      +
   1100F  THR*     2.8    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET1082 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    831E  TRP*     3.2    37.7    -      -       +      -
    835E  ILE*     4.7     9.4    -      -       +      +
    854E  TYR*     3.1    32.2    +      -       +      -
    855E  GLY      3.3    24.2    -      -       -      +
    856E  PHE*     4.6     8.7    -      -       +      -
    859E  ARG*     3.6    32.1    -      -       -      +
   1078F  ALA      3.1    13.4    +      -       -      +
   1079F  CYS*     3.9     3.8    -      -       -      +
   1081F  SER*     1.3    75.3    -      -       -      +
   1083F  ALA*     1.3    65.2    +      -       -      +
   1085F  SER*     3.2     5.2    +      -       -      -
   1086F  LEU*     3.0    22.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1083 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    859E  ARG*     6.2     0.2    -      -       -      +
   1079F  CYS      3.0    18.3    +      -       -      +
   1080F  PHE      3.9     3.4    -      -       -      +
   1082F  MET*     1.3    76.7    -      -       -      +
   1084F  LEU*     1.3    57.7    +      -       -      +
   1086F  LEU*     3.4     9.1    +      -       -      +
   1087F  MET*     2.9    37.3    +      -       +      +
   1141F  ALA*     4.4     8.5    -      -       +      -
   1145F  CYS*     3.6    26.5    -      -       +      +
   1146F  PRO*     5.2     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1084 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1080F  PHE*     3.1    23.1    +      -       +      +
   1081F  SER      3.3     9.4    -      -       -      +
   1082F  MET      3.1     0.2    -      -       -      -
   1083F  ALA*     1.3    74.2    -      -       -      +
   1085F  SER*     1.3    66.0    +      -       -      +
   1087F  MET*     3.3     2.1    +      -       -      +
   1088F  LEU*     2.9    38.0    +      -       +      +
   1098F  ILE*     3.4    29.6    -      -       +      -
   1124F  VAL*     3.7    27.1    -      -       +      -
   1134F  PHE*     4.4     3.1    -      -       +      -
   1137F  ILE*     4.0    19.1    -      -       +      -
   1138F  ILE*     3.3    34.8    -      -       +      -
   1141F  ALA*     4.1     9.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER1085 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    831E  TRP*     3.5    27.4    +      -       -      -
    833E  GLY      3.3    19.1    +      -       -      -
    835E  ILE*     3.5    21.8    +      -       -      +
   1081F  SER      3.2     5.4    +      -       -      -
   1082F  MET      3.2     8.6    +      -       -      -
   1084F  LEU*     1.3    78.7    -      -       -      +
   1086F  LEU*     1.3    64.8    +      -       -      +
   1088F  LEU*     3.3     2.3    +      -       -      +
   1089F  GLY*     2.9    18.7    +      -       -      -
   1095F  PRO*     4.0    22.1    -      -       -      +
   1098F  ILE*     4.1     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1086 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    835E  ILE*     3.4    32.3    -      -       +      +
    856E  PHE*     6.0     3.8    -      -       +      -
   1082F  MET*     3.0    13.7    +      -       +      +
   1083F  ALA*     3.4    12.8    -      -       -      +
   1085F  SER*     1.3    75.7    -      -       -      +
   1087F  MET*     1.3    74.5    +      -       +      +
   1089F  GLY*     3.0    13.0    +      -       -      -
   1090F  GLU*     3.1    42.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET1087 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1083F  ALA*     2.9    24.1    +      -       +      +
   1084F  LEU*     3.7     1.8    -      -       -      +
   1086F  LEU*     1.3    82.9    -      -       +      +
   1088F  LEU*     1.3    65.1    +      -       -      +
   1090F  GLU*     3.1    32.7    +      -       -      +
   1091F  ALA*     3.3    10.9    +      -       -      +
   1137F  ILE*     3.5    30.5    -      -       +      +
   1140F  LYS*     3.5    43.1    -      -       +      -
   1141F  ALA*     4.6    11.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1088 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1084F  LEU*     2.9    42.0    +      -       +      +
   1085F  SER      3.6     3.6    -      -       -      +
   1087F  MET*     1.3    70.8    -      -       -      +
   1089F  GLY*     1.3    63.9    +      -       -      +
   1091F  ALA*     2.9    16.7    +      -       +      +
   1092F  GLY      3.3     0.2    +      -       -      -
   1093F  PHE*     3.0    29.3    +      -       +      +
   1095F  PRO*     3.7    35.2    -      -       +      -
   1098F  ILE*     4.4     0.9    -      -       +      -
   1126F  VAL*     4.0    12.3    -      -       +      -
   1129F  ILE*     3.6    28.9    -      -       +      -
   1134F  PHE*     3.7    18.6    -      -       +      -
   1137F  ILE*     4.0    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY1089 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    835E  ILE*     4.1    15.3    -      -       -      -
   1085F  SER      2.9    15.1    +      -       -      -
   1086F  LEU      3.0     4.9    +      -       -      -
   1088F  LEU*     1.3    76.1    -      -       -      +
   1090F  GLU*     1.3    56.3    +      -       -      +
   1092F  GLY*     2.8    21.7    +      -       -      -
   1093F  PHE      3.2    12.5    +      -       -      -
   1094F  THR*     5.4     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU1090 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1086F  LEU*     3.1    39.6    +      -       +      +
   1087F  MET*     3.1    23.1    +      -       -      +
   1089F  GLY*     1.3    72.6    -      -       -      +
   1091F  ALA*     1.3    57.1    +      -       -      +
   1092F  GLY      3.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1091 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1087F  MET      3.3     8.4    +      -       -      +
   1088F  LEU*     2.9    12.8    +      -       +      +
   1090F  GLU*     1.3    78.2    -      -       -      +
   1092F  GLY*     1.3    60.5    +      -       -      +
   1093F  PHE*     3.4    27.0    -      -       +      -
   1137F  ILE*     4.6    17.7    -      -       +      -
----------------------------------------------------------
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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