Contacts of the helix formed by residues 1023 - 1048 (chain A) in PDB entry 2NZ6


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 VAL1023 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1021A  ILE      3.7     0.6    +      -       -      -
   1022A  ARG*     1.3    70.8    -      -       -      +
   1024A  GLU*     1.3    62.2    +      -       +      +
   1026A  PHE*     3.1    27.8    +      -       -      +
   1027A  GLU*     4.4     1.7    +      -       -      +
   1259A  ILE*     4.2    20.4    -      -       +      -
   1263A  ASN*     2.9    59.0    +      -       -      +
   1264A  THR      3.7     3.4    -      -       -      +
   1265A  VAL*     4.0    16.2    -      -       +      -
   1299A  VAL*     3.8    26.8    -      -       +      +
   1302A  GLN*     4.0    20.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU1024 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1022A  ARG*     3.6    33.9    -      -       +      -
   1023A  VAL*     1.3    84.2    -      -       +      +
   1025A  ASN*     1.3    77.3    +      -       -      +
   1027A  GLU*     5.3     1.0    +      -       -      +
   1263A  ASN*     5.3     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1025 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1021A  ILE*     4.2     8.5    -      -       +      -
   1022A  ARG*     2.9    24.9    +      -       -      +
   1024A  GLU*     1.3    96.2    +      -       -      +
   1026A  PHE*     1.3    57.6    +      -       -      +
   1027A  GLU      3.5     2.2    -      -       -      -
   1028A  ALA*     3.5    11.2    +      -       +      +
   1029A  TYR*     3.1    26.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE1026 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1021A  ILE*     4.0    13.7    -      -       +      -
   1022A  ARG      3.2     7.9    +      -       -      +
   1023A  VAL*     3.1    20.7    +      -       -      +
   1025A  ASN*     1.3    75.4    -      -       -      +
   1027A  GLU*     1.3    63.0    +      -       -      +
   1029A  TYR*     3.7    25.1    -      +       -      -
   1030A  PHE*     2.8    39.8    +      +       -      +
   1265A  VAL*     3.9    23.8    -      -       +      -
   1267A  VAL*     5.2     0.7    -      -       +      -
   1292A  ASN*     3.6    35.2    -      -       -      -
   1295A  VAL*     3.4    35.9    -      -       +      -
   1296A  LEU*     3.8    17.9    -      -       +      -
   1299A  VAL*     4.4     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1027 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1023A  VAL      4.4     1.0    +      -       -      +
   1024A  GLU      5.3     1.0    +      -       -      +
   1026A  PHE*     1.3    76.6    -      -       -      +
   1028A  ALA*     1.3    62.4    +      -       -      +
   1030A  PHE*     3.9     1.4    -      -       -      +
   1031A  LYS*     3.1    24.3    +      -       -      +
   1296A  LEU*     3.7    26.4    -      -       +      +
   1299A  VAL*     4.1    21.8    -      -       +      +
   1300A  ARG*     3.6    35.8    +      -       +      +
   1303A  LYS*     5.4     5.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1028 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1024A  GLU      5.8     0.4    +      -       -      +
   1025A  ASN*     3.5    12.8    +      -       +      +
   1026A  PHE      3.3     0.4    -      -       -      -
   1027A  GLU*     1.3    79.0    -      -       -      +
   1029A  TYR*     1.3    60.9    +      -       -      +
   1031A  LYS*     3.6     9.3    +      -       -      +
   1032A  LYS*     3.3    20.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR1029 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1019A  LYS*     4.1    12.7    -      -       -      +
   1021A  ILE*     3.6    38.3    -      -       +      +
   1025A  ASN*     3.1    17.7    +      -       +      +
   1026A  PHE*     3.9    32.5    -      +       -      +
   1027A  GLU      3.3     0.2    -      -       -      -
   1028A  ALA*     1.3    74.1    -      -       -      +
   1030A  PHE*     1.3    67.1    +      -       -      +
   1032A  LYS*     3.3    11.1    +      -       +      +
   1033A  GLN*     3.0    44.5    +      -       +      +
   1041A  PHE*     3.7    20.3    -      +       -      -
   1044A  GLU*     2.5    36.4    +      -       -      -
   1292A  ASN*     4.2     3.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE1030 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1026A  PHE*     2.8    32.3    +      +       +      +
   1027A  GLU      3.9     4.0    -      -       -      +
   1029A  TYR*     1.3    74.3    -      -       -      +
   1031A  LYS*     1.3    67.8    +      -       -      +
   1033A  GLN*     3.2     0.9    +      -       -      +
   1034A  GLN*     2.9    57.3    +      -       +      +
   1041A  PHE*     3.6    27.1    -      +       -      -
   1289A  VAL*     5.5     1.6    -      -       +      -
   1292A  ASN*     3.7    34.3    -      -       +      -
   1293A  GLN*     3.7    24.2    -      -       +      -
   1296A  LEU*     3.6    34.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS1031 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1027A  GLU      3.1    17.7    +      -       -      +
   1028A  ALA*     3.6     8.7    -      -       -      +
   1029A  TYR      3.3     0.2    -      -       -      -
   1030A  PHE*     1.3    80.5    -      -       -      +
   1032A  LYS*     1.3    62.6    +      -       -      +
   1034A  GLN*     3.7    11.8    +      -       +      +
   1035A  ALA*     3.5    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS1032 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1028A  ALA      3.3    10.4    +      -       -      +
   1029A  TYR*     3.3    15.2    +      -       +      +
   1030A  PHE      3.2     0.2    -      -       -      -
   1031A  LYS*     1.3    79.0    -      -       -      +
   1033A  GLN*     1.3    78.2    +      -       -      +
   1034A  GLN      3.6     0.5    +      -       -      -
   1035A  ALA*     3.7    16.0    +      -       -      +
   1040A  GLY      5.1     2.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN1033 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1019A  LYS*     3.8    10.6    -      -       -      +
   1029A  TYR*     3.0    39.9    +      -       +      +
   1030A  PHE      3.2     0.4    +      -       -      +
   1032A  LYS*     1.3    94.1    -      -       +      +
   1034A  GLN*     1.3    58.8    +      -       -      +
   1035A  ALA      3.4     0.4    +      -       -      -
   1038A  ASN*     3.6     4.0    -      -       -      -
   1040A  GLY*     3.2    38.9    +      -       -      -
   1041A  PHE*     3.3    46.3    +      -       +      -
   1044A  GLU*     2.7    26.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN1034 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1030A  PHE*     2.9    47.2    +      -       +      +
   1031A  LYS*     3.7    11.8    +      -       -      +
   1033A  GLN*     1.3    75.4    -      -       -      +
   1035A  ALA*     1.3    71.4    +      -       -      +
   1036A  ASP      3.7     0.5    +      -       -      -
   1037A  SER*     4.0     1.9    +      -       -      -
   1038A  ASN*     3.0    33.7    +      -       -      +
   1041A  PHE*     3.8     5.1    -      -       +      -
   1293A  GLN*     5.6     1.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1035 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1031A  LYS      3.5     9.9    +      -       -      +
   1032A  LYS*     3.7    14.7    -      -       -      +
   1033A  GLN      3.4     2.0    -      -       -      +
   1034A  GLN*     1.3    85.2    -      -       -      +
   1036A  ASP*     1.3    74.3    +      -       -      +
   1039A  CYS*     3.2    21.8    +      -       -      +
   1040A  GLY      4.6     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP1036 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1034A  GLN      3.7     0.2    +      -       -      -
   1035A  ALA*     1.3    76.0    -      -       -      +
   1037A  SER*     1.3    74.4    +      -       -      +
   1039A  CYS*     3.5    18.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER1037 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1034A  GLN      4.0     2.3    +      -       -      -
   1035A  ALA      3.5     0.4    -      -       -      -
   1036A  ASP*     1.3    77.5    -      -       -      +
   1038A  ASN*     1.3    74.8    +      -       -      +
   1039A  CYS*     3.3     1.6    +      -       -      -
   1042A  ALA*     5.3     1.2    -      -       -      +
   1285A  GLU*     4.7     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1038 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1033A  GLN      3.6     9.6    -      -       -      +
   1034A  GLN*     3.0    38.0    +      -       -      +
   1037A  SER*     1.3    78.7    +      -       -      +
   1039A  CYS*     1.3    59.2    +      -       -      +
   1040A  GLY      3.4     2.7    -      -       -      -
   1041A  PHE*     4.3     2.6    -      -       +      -
   1042A  ALA*     2.9    28.8    +      -       -      +
   1285A  GLU*     4.2     8.1    +      -       -      +
   1286A  ASP*     5.4     4.4    +      -       -      -
   1289A  VAL*     4.1    40.8    -      -       +      +
   1293A  GLN*     5.8     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS1039 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1035A  ALA      3.2    14.5    +      -       -      +
   1036A  ASP*     3.7    18.8    -      -       +      +
   1037A  SER      3.3     2.5    +      -       -      -
   1038A  ASN*     1.3    75.9    -      -       -      +
   1040A  GLY*     1.3    62.8    +      -       -      +
   1042A  ALA*     3.2     9.2    +      -       -      +
   1043A  GLU*     3.1    22.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY1040 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1032A  LYS      5.1     1.9    +      -       -      -
   1033A  GLN*     3.2    45.2    +      -       -      -
   1035A  ALA      4.6     0.8    +      -       -      -
   1039A  CYS*     1.3    79.2    -      -       -      +
   1041A  PHE*     1.3    59.1    +      -       -      +
   1043A  GLU*     3.3     8.6    +      -       -      +
   1044A  GLU*     3.2    17.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1041 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1029A  TYR*     3.7    14.1    -      +       -      -
   1030A  PHE*     3.6    42.4    -      +       -      -
   1033A  GLN*     3.3    42.7    +      -       +      -
   1034A  GLN*     3.8    11.0    -      -       +      -
   1038A  ASN*     3.9     7.4    -      -       -      +
   1039A  CYS      3.4     0.4    -      -       -      -
   1040A  GLY*     1.3    74.0    -      -       -      +
   1042A  ALA*     1.3    57.2    +      -       -      +
   1044A  GLU*     3.4    17.1    +      -       -      +
   1045A  TYR*     2.9    29.9    +      -       -      +
   1285A  GLU*     5.1     1.1    -      -       -      -
   1288A  TYR*     3.8     6.9    -      +       +      -
   1289A  VAL*     3.9    32.8    -      -       +      -
   1292A  ASN*     3.4    36.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1042 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1037A  SER      5.3     1.3    -      -       -      +
   1038A  ASN      2.9    19.2    +      -       -      +
   1039A  CYS*     3.4    10.1    -      -       -      +
   1041A  PHE*     1.3    76.4    -      -       -      +
   1043A  GLU*     1.3    56.4    +      -       -      +
   1045A  TYR*     3.6     1.6    +      -       -      +
   1046A  GLU*     3.0    32.8    +      -       +      +
   1285A  GLU*     3.8    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU1043 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1039A  CYS*     3.1    11.9    +      -       -      +
   1040A  GLY*     3.6    11.2    -      -       -      +
   1042A  ALA*     1.3    74.9    -      -       -      +
   1044A  GLU*     1.3    66.1    +      -       +      +
   1046A  GLU*     3.4     4.6    +      -       -      +
   1047A  ASP*     3.0    40.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU1044 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1019A  LYS*     3.1    29.3    +      -       +      +
   1029A  TYR*     2.5    29.5    +      -       -      -
   1033A  GLN*     2.7    20.2    +      -       -      -
   1040A  GLY      3.2     8.6    +      -       -      +
   1041A  PHE*     3.5    12.8    -      -       -      +
   1043A  GLU*     1.3    81.1    -      -       +      +
   1045A  TYR*     1.3    62.2    +      -       -      +
   1047A  ASP*     3.4     3.4    +      -       -      -
   1048A  LEU*     3.3    11.3    +      -       -      +
   1267A  VAL*     5.7     0.7    -      -       -      +
   1268A  TYR*     3.2    37.0    +      -       +      +
   1288A  TYR*     2.6    37.8    +      -       -      +
   1292A  ASN*     4.9     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR1045 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1041A  PHE      2.9    18.3    +      -       -      +
   1042A  ALA      3.9     4.7    -      -       -      +
   1043A  GLU      3.2     0.2    -      -       -      -
   1044A  GLU*     1.3    77.2    -      -       -      +
   1046A  GLU*     1.3    67.5    +      -       +      +
   1048A  LEU*     3.2    22.6    +      -       +      +
   1049A  LYS*     3.6     9.2    +      -       +      +
   1271A  VAL*     5.4     0.2    -      -       +      -
   1275A  ARG*     3.4    16.6    +      -       -      -
   1282A  VAL*     2.7    31.7    +      -       +      -
   1283A  GLN      2.9    21.2    +      -       -      -
   1284A  THR*     3.5    15.3    -      -       -      -
   1285A  GLU*     3.8    28.9    -      -       +      -
   1288A  TYR*     3.5    35.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with GLU1046 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1042A  ALA      3.0    20.1    +      -       -      +
   1043A  GLU*     4.1     4.9    -      -       -      +
   1044A  GLU      3.4     0.4    -      -       -      -
   1045A  TYR*     1.3    81.7    -      -       +      +
   1047A  ASP*     1.3    59.6    +      -       -      +
   1049A  LYS*     3.0    33.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP1047 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1043A  GLU*     3.0    32.2    +      -       -      +
   1044A  GLU*     3.6     8.5    -      -       -      +
   1045A  TYR      3.3     0.2    -      -       -      -
   1046A  GLU*     1.3    76.6    -      -       -      +
   1048A  LEU*     1.3    58.4    +      -       -      +
   1049A  LYS      3.4     0.8    +      -       -      -
   1050A  LEU      4.9     1.4    +      -       -      -
   1051A  VAL*     4.0     9.5    -      -       -      +
   1268A  TYR*     3.7    23.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1048 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1044A  GLU      3.3     8.3    +      -       -      +
   1045A  TYR*     3.2    15.7    +      -       +      +
   1047A  ASP*     1.3    76.9    -      -       -      +
   1049A  LYS*     1.3    60.3    +      -       -      +
   1050A  LEU      3.3     2.2    -      -       -      -
   1051A  VAL*     3.2    21.2    +      -       +      +
   1268A  TYR*     3.5    30.1    -      -       +      +
   1271A  VAL*     3.8    17.9    -      -       +      +
   1272A  TYR*     3.6    43.5    -      -       +      +
   1275A  ARG*     3.0    25.3    +      -       +      +
   1288A  TYR*     3.7    32.5    -      -       +      -
----------------------------------------------------------
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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