Contacts of the helix formed by residues 65 - 93 (chain A) in PDB entry 1GGZ


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 PHE 65 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  VAL*     4.0    18.8    -      -       +      -
     12A  PHE*     3.7     8.1    -      -       +      -
     13A  LYS*     3.5    52.5    -      -       +      -
     16A  PHE*     3.5    40.7    -      +       +      -
     25A  GLY      4.0     1.8    +      -       -      +
     64A  ASP*     1.3    76.9    -      -       -      +
     66A  PRO*     1.3    70.0    -      -       +      +
     68A  PHE*     3.1     5.6    +      +       -      -
     69A  LEU*     2.7    59.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 66 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64A  ASP*     3.3    19.1    -      -       +      +
     65A  PHE*     1.3    98.2    -      -       +      +
     67A  GLU*     1.3    58.3    +      -       +      +
     69A  LEU*     3.7     8.4    -      -       +      +
     70A  GLY*     2.9    25.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 67 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ILE*     3.8    16.8    -      -       -      +
     56A  ASP*     3.6     2.6    -      -       -      +
     57A  ARG*     3.5    24.6    -      -       +      +
     58A  ASP*     3.0    28.6    +      -       -      +
     62A  THR      3.1     9.7    -      -       -      +
     63A  VAL*     3.3    13.1    -      -       +      -
     64A  ASP*     3.0    22.4    +      -       -      +
     66A  PRO*     1.3    73.5    -      -       +      +
     68A  PHE*     1.3    65.4    +      -       -      +
     70A  GLY*     3.2     2.5    +      -       -      +
     71A  MET*     3.0    22.7    +      -       -      +
     74A  ARG*     4.7     1.6    +      -       -      -
    150A   CA      2.4    30.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 68 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  PHE*     3.5    27.1    -      -       +      -
     15A  ALA*     4.0    12.8    -      -       +      -
     16A  PHE*     3.6    29.4    -      +       +      -
     19A  PHE*     4.0    30.5    -      +       -      -
     27A  ILE*     3.9    18.4    -      -       +      -
     55A  ILE*     4.6     2.2    -      -       +      -
     63A  VAL*     3.9     9.3    -      -       +      +
     64A  ASP      2.9    14.3    +      -       -      +
     65A  PHE*     3.5    11.0    -      +       -      +
     67A  GLU*     1.3    76.5    -      -       -      +
     69A  LEU*     1.3    64.0    +      -       -      +
     71A  MET*     3.2    26.3    +      -       +      +
     72A  MET*     3.0    50.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 69 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  LEU*     3.5    32.1    -      -       +      -
      9A  VAL*     4.4    15.9    -      -       +      -
     12A  PHE*     3.6    31.0    -      -       +      -
     65A  PHE*     2.7    45.2    +      -       +      +
     66A  PRO*     3.7     8.3    -      -       +      +
     68A  PHE*     1.3    73.9    -      -       -      +
     70A  GLY*     1.3    57.8    +      -       -      +
     72A  MET*     3.2     3.1    +      -       -      +
     73A  ALA*     2.9    30.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 70 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66A  PRO      2.9    15.7    +      -       -      -
     67A  GLU*     3.2     4.0    +      -       -      -
     68A  PHE      3.2     0.2    -      -       -      -
     69A  LEU*     1.3    76.8    -      -       -      +
     71A  MET*     1.3    54.6    +      -       -      +
     73A  ALA*     3.4     6.0    +      -       -      +
     74A  ARG*     2.9    51.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 71 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55A  ILE*     3.9    41.1    -      -       +      -
     67A  GLU      3.0    12.3    +      -       -      +
     68A  PHE*     3.4    30.3    -      -       +      +
     70A  GLY*     1.3    73.6    -      -       -      +
     72A  MET*     1.3    77.8    +      -       -      +
     74A  ARG*     3.3    21.2    +      -       -      +
     75A  LYS*     3.0    63.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 72 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12A  PHE*     3.5    57.9    -      -       +      -
     15A  ALA*     5.1     5.6    -      -       +      -
     68A  PHE*     3.0    37.0    +      -       +      +
     69A  LEU      3.2     6.0    +      -       -      +
     71A  MET*     1.3    98.1    -      -       -      +
     73A  ALA*     1.3    59.4    +      -       -      +
     75A  LYS*     3.1    11.6    +      -       -      +
     76A  MET*     2.9    36.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 73 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  LEU*     4.4    25.6    -      -       +      -
     12A  PHE*     5.0     0.8    -      -       -      -
     69A  LEU*     2.9    16.2    +      -       +      +
     70A  GLY*     3.8     7.2    -      -       -      +
     72A  MET*     1.3    75.2    -      -       -      +
     74A  ARG*     1.3    58.6    +      -       +      +
     76A  MET*     3.3     7.0    +      -       -      +
     77A  LYS*     2.9    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 74 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  GLU      4.8     5.5    +      -       -      -
     55A  ILE*     5.0     4.6    +      -       -      +
     57A  ARG*     3.2    34.1    -      -       -      +
     67A  GLU      4.7     2.8    +      -       -      -
     70A  GLY*     2.9    33.6    +      -       -      +
     71A  MET*     3.4    28.6    -      -       -      +
     73A  ALA*     1.3    76.2    -      -       +      +
     75A  LYS*     1.3    59.2    +      -       +      +
     77A  LYS*     3.3     6.0    +      -       -      +
     78A  ASP*     2.9    37.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 75 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  MET*     3.0    49.0    +      -       +      +
     72A  MET*     3.6    13.7    -      -       -      +
     74A  ARG*     1.3    76.4    -      -       +      +
     76A  MET*     1.3    64.9    +      -       +      +
     78A  ASP*     3.2     7.5    +      -       -      +
     79A  THR*     3.0    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 76 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4A  LEU*     4.1    15.3    -      -       +      -
      8A  GLN*     3.3    27.8    -      -       +      +
     12A  PHE*     3.5    35.2    -      -       +      -
     72A  MET      2.9    17.6    +      -       -      +
     73A  ALA*     3.7     4.9    -      -       -      +
     75A  LYS*     1.3    77.4    -      -       +      +
     77A  LYS*     1.3    57.7    +      -       -      +
     79A  THR*     3.3     6.5    +      -       -      -
     80A  ASP*     2.8    41.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 77 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73A  ALA      2.9    17.5    +      -       -      +
     74A  ARG*     3.7     7.9    -      -       -      +
     75A  LYS      3.2     0.2    -      -       -      -
     76A  MET*     1.3    75.7    -      -       -      +
     78A  ASP*     1.3    60.5    +      -       -      +
     80A  ASP*     3.2    12.5    +      -       +      +
     81A  ASN*     2.8    56.9    +      -       -      +
     84A  GLU*     4.7     7.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  ARG*     2.9    21.5    +      -       -      +
     75A  LYS*     3.2     7.2    +      -       -      +
     77A  LYS*     1.3    76.8    -      -       -      +
     79A  THR*     1.3    65.1    +      -       -      +
     81A  ASN*     3.3    11.8    +      -       -      +
     82A  GLU*     3.1    35.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75A  LYS*     3.0    14.8    +      -       -      +
     76A  MET*     3.7     9.4    -      -       -      -
     78A  ASP*     1.3    76.9    -      -       -      +
     80A  ASP*     1.3    69.1    +      -       -      +
     82A  GLU*     3.2    13.8    +      -       -      +
     83A  GLU*     3.0    25.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76A  MET*     2.8    29.1    +      -       -      +
     77A  LYS*     3.5    12.8    -      -       +      +
     79A  THR*     1.3    82.2    -      -       -      +
     81A  ASN*     1.3    58.5    +      -       -      +
     83A  GLU*     3.3     7.1    +      -       -      +
     84A  GLU*     2.8    43.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  LYS*     2.8    57.0    +      -       -      +
     78A  ASP*     3.7    12.1    +      -       -      +
     79A  THR      3.3     0.2    -      -       -      -
     80A  ASP*     1.3    72.7    -      -       -      +
     82A  GLU*     1.3    65.1    +      -       +      +
     84A  GLU*     3.3    18.4    +      -       -      +
     85A  ILE*     3.0    34.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78A  ASP*     3.1    25.1    +      -       +      +
     79A  THR*     3.6    12.3    +      -       -      +
     80A  ASP      3.2     0.2    -      -       -      -
     81A  ASN*     1.3    79.7    -      -       +      +
     83A  GLU*     1.3    60.9    +      -       -      +
     85A  ILE*     3.4    10.7    +      -       +      +
     86A  ARG*     3.0    23.0    +      -       -      +
    138A  TYR*     4.6     5.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  THR*     3.0    19.5    +      -       +      +
     80A  ASP*     3.7     7.6    -      -       -      +
     82A  GLU*     1.3    72.7    -      -       -      +
     84A  GLU*     1.3    60.6    +      -       +      +
     86A  ARG*     3.0    38.8    +      -       -      -
     87A  GLU*     2.5    62.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  LYS*     4.7     6.6    +      -       -      -
     80A  ASP*     2.8    26.8    +      -       +      +
     81A  ASN*     3.6    24.5    -      -       -      +
     83A  GLU*     1.3    78.6    -      -       +      +
     85A  ILE*     1.3    57.5    +      -       +      +
     87A  GLU*     3.4     8.9    +      -       -      +
     88A  ALA*     2.9    29.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  ASN*     3.0    26.8    +      -       +      +
     82A  GLU*     3.8     7.2    -      -       +      +
     84A  GLU*     1.3    74.1    -      -       +      +
     86A  ARG*     1.3    60.6    +      -       -      +
     88A  ALA*     3.2     4.4    +      -       -      +
     89A  PHE*     2.9    25.3    +      -       -      +
    138A  TYR*     4.7     2.0    -      -       +      +
    141A  PHE*     3.6     9.9    -      -       +      -
    142A  VAL*     3.7    32.5    -      -       +      -
    145A  LEU*     3.1    46.4    -      -       +      +
    146A  VAL*     4.4    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82A  GLU      3.0    13.9    +      -       -      +
     83A  GLU*     3.0    40.8    +      -       -      +
     85A  ILE*     1.3    77.0    -      -       -      +
     87A  GLU*     1.3    71.8    +      -       -      +
     89A  PHE*     3.2     4.6    +      -       +      +
     90A  ARG*     2.3    88.9    +      -       +      +
    138A  TYR*     4.0    31.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  GLU*     2.5    59.5    +      -       -      +
     84A  GLU*     3.8     8.1    -      -       -      +
     86A  ARG*     1.3    78.6    -      -       -      +
     88A  ALA*     1.3    66.6    +      -       -      +
     90A  ARG*     3.1    11.4    +      -       -      +
     91A  VAL*     2.9    30.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  GLU      2.9    17.9    +      -       -      +
     85A  ILE*     3.2     7.4    +      -       -      +
     87A  GLU*     1.3    77.4    -      -       -      +
     89A  PHE*     1.4    58.0    +      -       -      +
     91A  VAL*     3.1     7.1    +      -       -      +
     92A  PHE*     2.8    43.7    +      -       +      -
    141A  PHE*     4.1    14.4    -      -       +      -
    145A  LEU*     5.2     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 89 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  ILE      2.9    13.9    +      -       -      +
     86A  ARG*     3.2     8.5    +      -       +      +
     88A  ALA*     1.4    76.6    -      -       -      +
     90A  ARG*     1.3    66.2    +      -       +      +
     92A  PHE*     3.2     4.2    +      -       -      +
     93A  ASP*     2.8    35.3    +      -       +      +
     98A  GLY*     3.4    37.2    -      -       -      -
     99A  PHE      4.6     0.2    -      -       -      -
    100A  VAL*     3.6    16.4    -      -       +      -
    136A  VAL      3.6    12.6    -      -       -      -
    137A  ASN      3.6     9.4    -      -       -      -
    138A  TYR*     3.4    47.6    -      +       +      -
    141A  PHE*     3.6    38.0    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  ARG*     2.3    67.9    +      -       +      +
     87A  GLU*     3.1     8.7    +      -       -      +
     89A  PHE*     1.3    85.9    -      -       +      +
     91A  VAL*     1.3    64.2    +      -       +      +
     93A  ASP*     3.3    27.2    +      -       -      +
     94A  LYS*     4.9     0.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  GLU*     2.9    21.2    +      -       +      +
     88A  ALA*     3.1    10.7    +      -       -      +
     90A  ARG*     1.3    79.8    -      -       +      +
     92A  PHE*     1.3    64.8    +      -       +      +
     93A  ASP      3.4     0.3    +      -       -      -
     94A  LYS*     4.0    10.6    +      -       -      +
    108A  VAL*     4.4    18.7    -      -       +      +
    112A  LEU*     6.3     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  ALA*     2.8    33.2    +      -       +      +
     89A  PHE*     3.6     8.1    -      -       -      +
     91A  VAL*     1.3    76.2    -      -       +      +
     93A  ASP*     1.3    56.6    +      -       -      +
     94A  LYS*     2.9    10.6    +      -       -      +
    100A  VAL*     3.7    20.0    -      -       +      -
    104A  GLU*     3.5    23.7    -      -       -      +
    105A  LEU*     3.6    29.2    -      -       +      -
    108A  VAL*     3.6    36.6    -      -       +      +
    109A  MET*     4.2    14.6    -      -       -      -
    112A  LEU*     5.3     9.9    -      -       +      -
    141A  PHE*     3.7    29.4    -      +       +      -
----------------------------------------------------------
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Residues in contact with ASP 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  PHE*     2.8    25.3    +      -       +      +
     90A  ARG*     3.3    18.8    -      -       -      +
     91A  VAL      3.2     0.6    -      -       -      -
     92A  PHE*     1.3    70.6    -      -       -      +
     94A  LYS*     1.3    58.2    +      -       -      +
     95A  ASP*     3.2     6.1    -      -       -      +
     96A  GLY*     2.9    24.2    +      -       -      -
     97A  ASN*     3.2     1.0    -      -       -      +
     98A  GLY*     2.7    32.7    +      -       -      -
     99A  PHE      3.6     8.5    -      -       -      +
    100A  VAL*     3.9     7.8    -      -       +      +
    104A  GLU*     3.9     6.1    -      -       -      -
    151A   CA      2.3    31.4    -      -       -      -
----------------------------------------------------------
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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