Contacts of the helix formed by residues 1066 - 1088 (chain N) in PDB entry 2A69


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 THR1066 (chain N).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    500M  ASN*     3.9    13.9    +      -       -      -
    516M  ARG*     5.3     4.6    +      -       -      +
    906M  PHE*     3.6     4.4    -      -       -      -
   1059N  SER*     6.0     0.2    -      -       -      -
   1064N  GLY      3.0     8.6    +      -       -      -
   1065N  LEU*     1.3    80.8    -      -       -      +
   1067N  VAL*     1.3    72.6    +      -       -      +
   1068N  LEU*     3.7     3.5    +      -       +      +
   1069N  GLU*     3.0    53.2    +      -       +      +
   1070N  TYR*     3.3    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1067 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435M  TYR*     4.1     7.1    +      -       -      +
    498M  GLN*     3.3    32.1    -      -       +      +
    500M  ASN*     3.0    34.8    -      -       -      +
    516M  ARG*     5.1     0.7    -      -       -      +
    536M  PRO*     4.2    15.5    -      -       +      -
    539M  VAL*     4.4    16.9    -      -       +      +
    540M  PHE*     5.0     5.0    -      -       +      -
    906M  PHE*     3.9    35.5    -      -       +      -
   1066N  THR*     1.3    78.3    +      -       -      +
   1068N  LEU*     1.3    58.4    +      -       -      +
   1070N  TYR*     3.3    16.6    -      -       -      +
   1071N  PHE*     3.7     5.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1068 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435M  TYR*     3.1    33.9    -      -       +      +
    516M  ARG*     3.1    68.6    -      -       +      +
    521M  PRO*     4.0    15.7    -      -       +      -
   1066N  THR*     3.7     4.1    +      -       +      +
   1067N  VAL*     1.3    77.0    -      -       +      +
   1069N  GLU*     1.3    68.6    +      -       +      +
   1070N  TYR      2.6     6.9    +      -       -      -
   1071N  PHE*     2.9    17.5    +      -       +      +
   1072N  ILE*     2.9    38.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1069 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    516M  ARG*     6.2     0.4    -      -       -      +
   1056N  PRO      3.4     7.2    -      -       -      +
   1057N  VAL*     3.0    24.3    -      -       +      +
   1058N  ARG*     2.6    36.1    +      -       -      +
   1059N  SER*     2.8    22.8    +      -       -      -
   1065N  LEU*     3.3    13.2    -      -       +      -
   1066N  THR*     3.0    29.6    -      -       +      +
   1068N  LEU*     1.3    80.0    -      -       +      +
   1070N  TYR*     1.3    51.4    +      -       -      +
   1072N  ILE*     3.4    10.6    -      -       -      +
   1073N  SER*     2.7    35.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR1070 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    440M  PRO*     6.1     1.1    -      -       +      -
    441M  VAL*     4.6     7.4    -      -       +      -
    540M  PHE*     3.6    26.2    -      +       -      -
    550M  LEU*     3.3    35.3    -      -       +      +
    551M  GLU      4.9     1.1    -      -       -      -
    553M  ASP      2.5    31.4    +      -       -      -
    554M  ASP*     3.8     0.6    -      -       -      -
    555M  ALA*     3.3    33.5    -      -       +      -
    558M  ALA*     3.9     0.7    -      -       -      +
    906M  PHE*     3.5    17.0    -      +       +      -
   1042N  ARG*     5.3     1.3    -      -       -      -
   1065N  LEU*     3.3    30.5    -      -       +      +
   1066N  THR      3.3    11.4    +      -       -      +
   1067N  VAL      3.3    13.2    -      -       -      +
   1068N  LEU      2.6     0.4    +      -       -      -
   1069N  GLU*     1.3    73.5    -      -       -      +
   1071N  PHE*     1.3    67.0    +      -       -      +
   1072N  ILE      2.9     1.6    -      -       -      -
   1073N  SER*     2.8    18.2    +      -       -      -
   1074N  SER*     2.9    13.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE1071 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    430M  VAL*     3.8    13.9    -      -       +      -
    431M  HIS      3.7    11.2    -      -       -      -
    432M  ARG*     3.6    26.9    -      -       +      -
    434M  HIS*     4.3     4.3    -      -       +      -
    435M  TYR*     3.4    52.3    -      +       +      -
    438M  ILE      5.2     0.4    -      -       -      -
    440M  PRO*     4.6    17.5    -      -       +      -
    539M  VAL*     4.1    14.3    -      -       +      +
    540M  PHE*     6.0     1.1    -      -       -      -
   1067N  VAL      3.7     5.7    +      -       -      +
   1068N  LEU*     2.9    16.7    +      -       +      +
   1070N  TYR*     1.3    77.2    -      -       -      +
   1072N  ILE*     1.3    63.0    +      -       +      +
   1074N  SER*     2.5    27.5    +      -       -      -
   1075N  HIS*     3.5    30.7    -      +       -      -
----------------------------------------------------------
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Residues in contact with ILE1072 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    519M  GLY      5.7     0.9    -      -       -      +
    521M  PRO*     4.0    12.3    -      -       +      -
   1045N  MET*     3.6    26.1    -      -       +      +
   1046N  GLN      4.3     2.1    -      -       -      +
   1053N  PHE*     3.4    49.8    -      -       +      -
   1055N  VAL      5.5     3.1    -      -       -      +
   1057N  VAL*     4.8     7.4    -      -       +      -
   1068N  LEU*     2.9    31.9    +      -       +      +
   1069N  GLU*     3.4    13.2    -      -       -      +
   1071N  PHE*     1.3    80.9    -      -       +      +
   1073N  SER*     1.3    64.4    +      -       -      +
   1074N  SER      3.3     0.5    +      -       -      -
   1075N  HIS*     3.5    25.6    +      -       +      +
   1076N  GLY      4.6     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER1073 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    555M  ALA*     5.6     1.6    -      -       -      -
   1042N  ARG*     3.8    30.5    +      -       -      -
   1045N  MET*     3.3    32.9    -      -       -      +
   1057N  VAL*     3.9     5.2    -      -       -      +
   1065N  LEU*     4.8     2.0    -      -       -      +
   1069N  GLU      2.7    18.8    +      -       -      -
   1070N  TYR*     2.8    14.6    +      -       -      -
   1072N  ILE*     1.3    72.7    -      -       -      +
   1074N  SER*     1.3    64.6    +      -       -      +
   1075N  HIS      3.3     1.0    +      -       -      -
   1076N  GLY*     3.4    10.6    +      -       -      -
   1077N  ALA*     3.5     8.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER1074 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    430M  VAL*     3.6    22.2    -      -       -      +
    440M  PRO*     4.2    25.2    -      -       -      +
    441M  VAL*     6.1     0.9    -      -       -      -
    555M  ALA*     4.8    12.9    -      -       -      +
   1070N  TYR*     2.9    11.3    +      -       -      -
   1071N  PHE*     2.5    27.3    +      -       -      -
   1073N  SER*     1.3    77.6    -      -       -      +
   1075N  HIS*     1.3    65.8    +      -       -      +
   1077N  ALA*     2.8    25.6    +      -       -      +
   1078N  ARG*     3.3     4.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS1075 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    429M  ASP*     4.5     4.3    -      -       -      +
    430M  VAL*     2.9    40.2    +      -       +      +
    431M  HIS      4.5     4.3    -      -       -      -
    432M  ARG*     4.6     5.4    -      -       +      +
   1046N  GLN      4.1     9.6    -      -       -      +
   1047N  LYS      4.6     6.7    -      -       -      +
   1048N  PRO*     4.2    27.6    -      -       +      +
   1053N  PHE*     4.5    16.1    -      +       -      -
   1071N  PHE*     3.5    38.2    -      +       -      -
   1072N  ILE*     3.5    27.4    -      -       -      +
   1073N  SER      3.3     0.4    +      -       -      -
   1074N  SER*     1.3    81.9    +      -       -      +
   1076N  GLY*     1.3    65.5    +      -       -      +
   1077N  ALA      3.0     0.9    +      -       -      -
   1078N  ARG*     3.1    13.7    +      -       -      +
   1079N  LYS*     3.4     9.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY1076 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1045N  MET*     6.1     1.7    -      -       -      +
   1046N  GLN*     4.8     7.9    +      -       -      +
   1072N  ILE      4.6     0.8    +      -       -      -
   1073N  SER      3.4     7.0    +      -       -      -
   1074N  SER      3.3     1.0    -      -       -      -
   1075N  HIS*     1.3    79.8    -      -       -      +
   1077N  ALA*     1.3    62.9    +      -       -      +
   1079N  LYS*     3.3    12.5    +      -       -      +
   1080N  GLY*     3.1    17.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1077 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    555M  ALA*     4.9    12.3    -      -       +      -
    556M  ASN*     5.0    21.9    -      -       +      +
   1073N  SER      3.5     8.0    +      -       -      +
   1074N  SER*     2.8    22.6    +      -       -      +
   1076N  GLY*     1.3    76.1    -      -       -      +
   1078N  ARG*     1.3    61.0    +      -       +      +
   1080N  GLY*     2.9    13.4    +      -       -      -
   1081N  GLY*     3.0    10.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG1078 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    428M  ARG      2.5    34.6    +      -       -      +
    429M  ASP*     3.7    17.8    -      -       -      +
    430M  VAL*     3.5    33.1    -      -       +      +
    434M  HIS*     5.5     3.4    +      -       -      -
    438M  ILE*     5.8     0.4    -      -       -      +
    439M  CYS      4.3     8.7    +      -       -      -
    440M  PRO*     4.0    29.1    +      -       -      +
    443M  THR*     3.4    42.4    -      -       -      +
    449M  ILE*     4.5    11.2    -      -       -      -
    450M  GLY*     3.9     7.7    +      -       -      -
    453M  THR*     4.9     6.9    +      -       -      +
    559M  LEU*     5.6     2.2    -      -       -      +
   1074N  SER      4.3     2.5    -      -       -      +
   1075N  HIS      3.1     9.0    +      -       -      +
   1077N  ALA*     1.3    80.3    -      -       +      +
   1079N  LYS*     1.3    53.0    +      -       -      +
   1081N  GLY*     2.9     4.0    +      -       -      +
   1082N  ALA*     2.7    37.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS1079 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425M  PHE*     3.5    30.6    -      -       +      -
    429M  ASP*     3.9     2.5    +      -       -      +
   1046N  GLN*     4.5    14.2    +      -       -      +
   1075N  HIS      3.4     6.6    +      -       -      +
   1076N  GLY*     3.3    13.6    +      -       -      +
   1077N  ALA      3.3     0.6    -      -       -      -
   1078N  ARG*     1.3    77.9    -      -       -      +
   1080N  GLY*     1.3    63.6    +      -       -      +
   1083N  ASP*     3.1    33.9    +      -       -      +
   1237N  THR*     5.9     4.9    -      -       -      -
   1239N  ARG*     5.1    21.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY1080 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1076N  GLY      3.1     8.1    +      -       -      -
   1077N  ALA*     2.9     9.2    +      -       -      -
   1079N  LYS*     1.3    78.2    -      -       -      +
   1081N  GLY*     1.3    51.2    +      -       -      +
   1083N  ASP*     3.3     6.5    +      -       -      +
   1084N  THR*     2.5    37.8    +      -       -      +
   1087N  ARG*     5.3     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY1081 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    445M  GLU*     5.0     8.3    -      -       -      -
    449M  ILE*     3.8    23.4    -      -       -      +
    556M  ASN*     5.9     2.6    +      -       -      -
   1077N  ALA      3.0     8.5    +      -       -      -
   1078N  ARG      2.9     5.8    +      -       -      -
   1080N  GLY*     1.3    72.7    -      -       -      +
   1082N  ALA*     1.3    63.4    +      -       -      +
   1084N  THR*     2.6    21.9    +      -       -      -
   1085N  ALA*     3.0    15.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1082 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425M  PHE*     3.4    38.4    -      -       +      -
    428M  ARG*     5.1    13.7    -      -       +      +
    449M  ILE*     3.9    18.5    -      -       +      +
   1078N  ARG      2.7    18.8    +      -       -      +
   1081N  GLY*     1.3    72.3    -      -       -      +
   1083N  ASP*     1.3    61.4    +      -       -      +
   1085N  ALA*     3.7     1.4    +      -       -      +
   1086N  LEU*     3.2    31.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP1083 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425M  PHE*     3.7    17.5    -      -       -      -
   1079N  LYS*     3.1    31.2    +      -       -      +
   1080N  GLY*     3.5     7.0    -      -       -      +
   1082N  ALA*     1.3    75.6    -      -       -      +
   1084N  THR*     1.3    65.8    +      -       -      +
   1086N  LEU*     3.1    17.4    +      -       -      +
   1087N  ARG*     3.1    30.2    +      -       -      +
   1237N  THR*     4.3     6.9    -      -       -      +
   1238N  MET*     2.8    43.6    +      -       -      +
   1239N  ARG*     4.6     4.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR1084 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    445M  GLU*     4.8     7.2    +      -       -      +
   1080N  GLY      2.5    20.5    +      -       -      +
   1081N  GLY*     2.6    17.9    +      -       -      -
   1083N  ASP*     1.3    73.9    -      -       -      +
   1085N  ALA*     1.3    61.0    +      -       -      +
   1087N  ARG*     3.0    25.7    +      -       -      +
   1088N  THR*     3.2    14.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1085 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    428M  ARG*     4.6     2.5    -      -       -      +
    446M  GLY*     4.0     5.6    -      -       -      +
    447M  ALA*     3.4    49.7    -      -       -      +
    449M  ILE*     4.0     5.8    -      -       +      -
   1081N  GLY      3.0    15.2    +      -       -      +
   1082N  ALA      3.9     5.2    -      -       -      +
   1084N  THR*     1.3    75.9    -      -       -      +
   1086N  LEU*     1.3    61.8    +      -       +      +
   1087N  ARG      3.5     0.3    +      -       -      -
   1088N  THR*     3.5    20.2    +      -       -      -
   1089N  ALA*     4.5     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1086 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425M  PHE*     5.0    14.8    -      -       +      -
    428M  ARG*     4.5    17.7    -      -       -      +
    447M  ALA      5.5     0.4    -      -       -      +
   1082N  ALA*     3.2    22.5    +      -       +      +
   1083N  ASP*     3.1    14.3    +      -       -      +
   1084N  THR      3.0     1.0    -      -       -      -
   1085N  ALA*     1.3    83.1    -      -       +      +
   1087N  ARG*     1.3    60.9    +      -       -      +
   1088N  THR      3.4     0.2    -      -       -      -
   1089N  ALA*     4.0     4.8    +      -       -      +
   1090N  ASP*     3.4    26.0    +      -       -      +
   1238N  MET*     5.0    22.2    -      -       +      +
   1239N  ARG      5.7     2.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG1087 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1083N  ASP*     3.1    43.6    +      -       -      +
   1084N  THR*     3.0    18.8    +      -       -      +
   1086N  LEU*     1.3    76.0    -      -       -      +
   1088N  THR*     1.3    58.0    +      -       -      +
   1089N  ALA      2.8    10.9    +      -       -      -
   1090N  ASP*     3.4    10.8    -      -       +      +
   1091N  SER*     2.9    33.2    +      -       -      +
   1233N  GLY      4.7     1.8    -      -       -      +
   1234N  THR*     2.8    48.6    +      -       +      +
   1235N  GLN      4.7     0.6    -      -       -      -
   1236N  LEU      3.0    20.4    +      -       -      -
   1237N  THR*     5.1     1.6    -      -       -      +
   1238N  MET*     3.2    37.6    -      -       -      +
   1256N  LEU*     3.9    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR1088 (chain N). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447M  ALA*     5.7     4.8    +      -       +      -
   1084N  THR      3.2    15.2    +      -       -      -
   1085N  ALA*     3.6    15.7    +      -       -      -
   1086N  LEU      3.4     1.0    -      -       -      -
   1087N  ARG*     1.3    77.1    -      -       -      +
   1089N  ALA*     1.3    55.6    +      -       -      +
   1091N  SER*     4.5     8.1    +      -       -      -
   1234N  THR*     6.3     0.2    -      -       -      -
----------------------------------------------------------
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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