Contacts of the helix formed by residues 77 - 104 (chain A) in PDB entry 3H90


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 LYS 77 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75A  HIS      3.2     0.9    +      -       -      -
     76A  GLY*     1.3    70.4    -      -       -      +
     78A  ALA*     1.3    66.4    +      -       -      +
     79A  GLU      3.0     0.4    -      -       -      -
     80A  SER*     2.9    13.4    +      -       -      +
     81A  LEU*     2.9    23.0    +      -       -      +
    204A  SER*     3.4    21.1    -      -       -      +
    205A  LEU*     4.0    15.1    +      -       +      +
    207A  ASP*     3.2    16.4    +      -       -      -
    237A  ARG*     5.1     1.3    -      -       -      +
    238A  GLN      4.6     1.8    -      -       -      -
    239A  SER*     3.8    29.6    +      -       -      +
    240A  GLY      4.8     0.7    -      -       -      +
     77C  LYS*     3.0    25.4    -      -       -      +
    205C  LEU      3.5    21.3    +      -       -      +
    206C  LEU*     4.1    17.0    -      -       +      -
    207C  ASP*     2.9    31.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 78 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  VAL*     3.7    16.4    -      -       +      +
     62A  TYR*     4.0    19.1    -      -       +      -
     63A  SER*     3.8    18.8    -      -       -      -
     75A  HIS      3.0    16.8    +      -       -      +
     76A  GLY      2.8     4.8    +      -       -      -
     77A  LYS*     1.3    73.0    -      -       -      +
     79A  GLU*     1.3    55.4    +      -       -      +
     81A  LEU*     3.4     7.1    +      -       -      +
     82A  ALA*     2.8    30.1    +      -       -      +
    206C  LEU*     3.9    14.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 79 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  ARG*     3.3    35.3    +      -       -      -
     14A  ILE*     4.4     7.9    -      -       +      +
     59A  VAL*     5.3     0.7    -      -       -      -
     60A  VAL*     5.1     1.8    -      -       +      -
     63A  SER*     3.3    24.9    +      -       -      +
     64A  LEU*     5.1     1.6    -      -       -      +
     76A  GLY      2.8    10.3    +      -       -      +
     78A  ALA*     1.3    77.8    -      -       -      +
     80A  SER*     1.3    52.2    +      -       -      +
     82A  ALA*     3.0     6.0    +      -       -      +
     83A  ALA*     2.7    35.5    +      -       -      +
    144A  SER*     2.8    28.7    +      -       -      -
    145A  GLN*     3.6     8.7    +      -       +      +
    146A  ALA*     3.2    28.2    +      -       +      +
    240A  GLY*     4.2     6.9    -      -       -      -
    241A  PRO*     3.9    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 80 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77A  LYS*     2.9    18.3    +      -       -      +
     79A  GLU*     1.3    72.7    -      -       -      +
     81A  LEU*     1.3    55.6    -      -       -      +
     83A  ALA*     3.4     8.0    +      -       -      +
     84A  LEU*     2.8    35.5    +      -       -      +
    145A  GLN*     3.3    27.4    +      -       -      +
    201A  ALA*     3.5    13.0    -      -       -      +
    204A  SER*     3.7    12.2    -      -       -      -
    205A  LEU*     3.8    18.6    -      -       -      -
    240A  GLY*     4.9     7.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 81 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59A  VAL*     5.9     0.7    -      -       +      -
     77A  LYS      2.9     8.0    +      -       -      +
     78A  ALA*     3.4     9.0    -      -       -      +
     80A  SER*     1.3    75.2    -      -       -      +
     82A  ALA*     1.3    54.6    +      -       -      +
     84A  LEU*     2.9     6.5    +      -       +      +
     85A  ALA*     2.7    35.6    +      -       -      +
    205A  LEU*     3.5    37.7    -      -       +      -
     84C  LEU*     5.0     9.2    -      -       +      -
    202C  VAL*     3.9    27.4    -      -       +      +
    205C  LEU*     3.8    22.2    -      -       +      -
    206C  LEU*     3.5    29.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 82 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     56A  ASN*     3.9    18.8    -      -       -      +
     59A  VAL*     3.6    23.5    -      -       +      +
     60A  VAL*     5.9     0.4    -      -       +      -
     78A  ALA      2.8    17.7    +      -       -      +
     79A  GLU*     3.3    11.0    -      -       -      +
     81A  LEU*     1.3    72.5    -      -       -      +
     83A  ALA*     1.3    61.2    +      -       -      +
     85A  ALA*     3.5     7.3    -      -       -      +
     86A  GLN*     3.1    32.4    +      -       -      +
    146A  ALA*     4.7     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 83 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  GLU      2.7    15.6    +      -       -      +
     80A  SER*     3.4    12.1    -      -       -      +
     82A  ALA*     1.3    70.4    -      -       -      +
     84A  LEU*     1.3    53.8    +      -       -      +
     86A  GLN*     2.7     8.5    +      -       -      +
     87A  SER*     2.7    36.1    +      -       -      -
    145A  GLN*     3.9    22.7    -      -       -      +
    146A  ALA*     4.9     1.3    -      -       -      +
    149A  ALA*     3.8    16.1    -      -       +      +
    197A  MET*     4.3     9.4    -      -       +      -
    201A  ALA*     4.0    12.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 84 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80A  SER      2.8    20.8    +      -       -      +
     81A  LEU*     3.5     4.9    -      -       +      +
     83A  ALA*     1.3    72.0    -      -       -      +
     85A  ALA*     1.3    63.0    +      -       -      +
     87A  SER*     3.0    26.3    +      -       -      +
     88A  MET*     3.3    38.0    +      -       +      +
    198A  GLY*     4.2     5.8    -      -       -      +
    201A  ALA*     3.7     9.1    -      -       +      +
    202A  VAL*     3.8    28.0    -      -       +      -
    205A  LEU*     4.0    20.4    -      -       +      -
     81C  LEU*     4.9    10.3    -      -       +      -
     84C  LEU*     5.5    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 85 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81A  LEU      2.7    19.4    +      -       -      +
     82A  ALA*     3.5    10.8    -      -       -      +
     84A  LEU*     1.3    75.4    -      -       -      +
     86A  GLN*     1.3    64.5    +      -       +      +
     88A  MET*     3.3     7.4    +      -       -      +
     89A  PHE*     3.3    25.9    +      -       +      -
     88C  MET*     5.7    11.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 86 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  ALA*     5.6     6.8    -      -       +      +
     53A  SER*     5.6     0.9    -      -       -      -
     56A  ASN*     3.4    39.3    +      -       -      +
     82A  ALA*     3.1    15.0    +      -       -      +
     83A  ALA      2.7    12.3    +      -       -      +
     85A  ALA*     1.3    72.9    -      -       +      +
     87A  SER*     1.3    53.5    +      -       -      +
     89A  PHE*     3.0     6.8    +      -       -      +
     90A  ILE*     2.7    51.3    +      -       +      +
    146A  ALA      3.7     5.3    +      -       -      -
    149A  ALA*     3.9    12.1    -      -       +      +
    150A  ASP*     3.4    37.4    -      -       -      +
    153A  HIS*     5.5     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 87 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  ALA      2.7    14.7    +      -       -      -
     84A  LEU*     3.0    18.0    +      -       -      +
     86A  GLN*     1.3    73.2    -      -       -      +
     88A  MET*     1.3    58.6    +      -       -      +
     90A  ILE*     4.5     6.7    -      -       -      +
     91A  SER*     2.8    31.7    +      -       -      -
    149A  ALA*     5.0     1.0    -      -       -      +
    152A  LEU*     6.0     0.2    -      -       -      -
    194A  ALA*     3.4    26.0    -      -       -      +
    197A  MET*     4.0    10.5    -      -       -      -
    198A  GLY*     3.2    25.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 88 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84A  LEU*     3.3    40.7    +      -       +      +
     85A  ALA*     3.6     9.2    -      -       -      +
     86A  GLN      3.2     0.6    -      -       -      -
     87A  SER*     1.3    83.8    +      -       -      +
     89A  PHE*     1.3    65.3    +      -       +      +
     91A  SER*     3.3     6.4    +      -       -      -
     92A  GLY*     2.9    24.9    +      -       -      -
     84C  LEU*     6.5     0.4    -      -       +      -
     85C  ALA*     5.7    11.2    -      -       +      -
     88C  MET*     5.1    23.1    -      -       +      +
     89C  PHE*     6.0     6.5    -      -       -      -
----------------------------------------------------------
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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  ALA*     3.3    14.3    +      -       +      +
     86A  GLN*     3.0     9.5    +      -       -      +
     88A  MET*     1.3    83.8    -      -       +      +
     90A  ILE*     1.3    62.0    +      -       +      +
     92A  GLY*     3.4     2.0    +      -       -      -
     93A  SER*     3.2    29.8    +      -       -      -
     88C  MET*     5.9     7.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 90 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  GLN*     2.7    41.6    +      -       +      +
     87A  SER*     4.6     1.3    -      -       -      +
     89A  PHE*     1.3    70.8    -      -       +      +
     91A  SER*     1.3    63.8    +      -       -      +
     92A  GLY      3.1     1.8    -      -       -      -
     93A  SER*     3.6     7.0    +      -       -      +
     94A  ALA*     3.2    23.4    +      -       -      +
    149A  ALA*     3.5    26.2    -      -       -      +
    152A  LEU*     4.1    13.9    -      -       +      -
    153A  HIS*     3.7    35.4    -      -       +      +
    156A  SER*     5.2     1.6    -      -       -      +
    190A  ILE*     4.0    19.0    -      -       +      +
    194A  ALA*     3.8    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 91 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87A  SER      2.8    23.1    +      -       -      -
     88A  MET*     3.5     8.3    -      -       -      -
     90A  ILE*     1.3    75.9    -      -       -      +
     92A  GLY*     1.3    60.3    +      -       -      +
     94A  ALA*     4.1     2.7    -      -       -      -
     95A  LEU*     3.6    10.4    +      -       -      +
    191A  LEU*     3.4    35.4    +      -       -      +
    194A  ALA*     3.7    13.6    -      -       -      +
    195A  LEU*     4.2    14.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 92 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  MET      2.9    14.5    +      -       -      -
     89A  PHE*     3.4     3.5    +      -       -      -
     90A  ILE      3.1     0.4    -      -       -      -
     91A  SER*     1.3    75.1    -      -       -      +
     93A  SER*     1.3    57.2    +      -       -      +
     94A  ALA      3.0     4.4    +      -       -      -
     95A  LEU*     3.1     6.2    +      -       -      +
     96A  PHE*     2.9    28.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 93 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89A  PHE      3.2    16.8    +      -       -      -
     90A  ILE*     3.6     7.3    +      -       -      -
     92A  GLY*     1.3    73.9    -      -       -      +
     94A  ALA*     1.3    56.7    +      -       -      +
     96A  PHE*     3.5    12.2    -      -       -      +
     97A  LEU*     3.1    27.5    +      -       -      +
    153A  HIS*     5.9     5.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 94 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  ILE      3.2    17.6    +      -       -      +
     91A  SER      4.2     1.6    -      -       -      +
     92A  GLY      3.0     1.2    -      -       -      -
     93A  SER*     1.3    76.8    -      -       -      +
     95A  LEU*     1.3    60.9    +      -       -      +
     96A  PHE      3.3     0.2    -      -       -      -
     97A  LEU*     3.8     4.0    -      -       -      +
     98A  PHE*     3.1    26.2    +      -       -      +
    187A  GLY*     3.5    13.4    -      -       -      +
    190A  ILE*     4.0    14.1    -      -       +      -
    191A  LEU*     3.5    35.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 95 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  SER      3.6    12.0    +      -       -      +
     92A  GLY*     3.1     7.9    +      -       -      +
     94A  ALA*     1.3    76.2    -      -       -      +
     96A  PHE*     1.3    61.8    +      -       -      +
     97A  LEU      3.2     0.2    -      -       -      -
     98A  PHE*     4.3     6.5    -      -       +      +
     99A  LEU*     3.0    54.6    +      -       +      +
    191A  LEU*     4.4    21.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 96 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92A  GLY      2.9    18.0    +      -       -      +
     93A  SER*     3.5    12.1    -      -       -      +
     95A  LEU*     1.3    79.9    -      -       -      +
     97A  LEU*     1.3    60.7    +      -       +      +
     99A  LEU*     3.7     3.6    +      -       -      +
    100A  THR*     2.4    48.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 97 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  SER      3.1    18.0    +      -       -      +
     94A  ALA*     3.6     6.3    +      -       -      +
     95A  LEU      3.2     0.2    -      -       -      -
     96A  PHE*     1.3    83.8    -      -       +      +
     98A  PHE*     1.3    60.8    +      -       -      +
    100A  THR*     3.8    12.8    -      -       +      +
    101A  GLY      3.1    14.4    +      -       -      -
    183A  ALA*     3.0    43.1    -      -       +      +
    186A  ILE*     4.7    22.9    -      -       +      -
    187A  GLY*     4.7     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 98 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  ALA      3.1    18.4    +      -       -      +
     95A  LEU*     3.3     7.6    +      -       +      +
     97A  LEU*     1.3    74.8    -      -       -      +
     99A  LEU*     1.3    79.7    +      -       +      +
    100A  THR      3.3     0.2    -      -       -      -
    101A  GLY*     3.1    13.3    +      -       -      -
    102A  ILE*     3.2    29.7    +      -       +      +
    183A  ALA      4.5     1.8    -      -       -      -
    184A  LEU*     3.8    30.1    -      -       +      -
    187A  GLY*     4.1    12.8    -      -       -      -
    188A  ILE*     3.7    29.8    -      -       +      -
    191A  LEU*     6.2     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 99 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  LEU*     3.0    43.8    +      -       +      +
     96A  PHE*     4.2     4.0    -      -       -      +
     98A  PHE*     1.3    93.7    -      -       +      +
    100A  THR*     1.3    59.6    +      -       -      +
    101A  GLY      3.2     0.4    -      -       -      -
    102A  ILE*     3.7    23.7    +      -       +      +
    103A  GLN*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 100 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  PHE*     2.4    42.7    +      -       +      -
     97A  LEU*     3.8    17.0    -      -       +      +
     98A  PHE      3.3     0.2    -      -       -      -
     99A  LEU*     1.3    75.9    -      -       -      +
    101A  GLY*     1.3    62.7    +      -       -      +
    103A  GLN*     3.6    16.7    -      -       -      +
    104A  HIS*     3.2    52.1    +      -       +      +
    183A  ALA*     5.7     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 101 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  LEU      3.1    12.8    +      -       -      -
     98A  PHE      3.1    10.5    +      -       -      -
    100A  THR*     1.3    79.2    -      -       -      +
    102A  ILE*     1.3    56.5    +      -       -      +
    104A  HIS      4.3     0.2    -      -       -      -
    105A  LEU*     3.8     6.2    +      -       -      +
    180A  ALA*     3.7    28.2    -      -       -      +
    183A  ALA*     4.4     5.8    -      -       -      -
    184A  LEU*     3.8    28.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 102 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  PHE*     3.2    31.1    +      -       +      +
     99A  LEU*     3.8    31.0    -      -       +      +
    101A  GLY*     1.3    72.9    -      -       -      +
    103A  GLN*     1.3    66.5    +      -       -      +
    105A  LEU*     3.5    29.2    -      -       +      +
    107A  SER*     4.1     3.3    +      -       -      -
    184A  LEU*     3.6    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 103 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  LEU      3.0    21.1    +      -       -      +
    100A  THR*     3.3    17.5    +      -       -      +
    102A  ILE*     1.3    77.2    -      -       -      +
    104A  HIS*     1.3    76.0    +      -       -      +
    105A  LEU      3.1     0.2    +      -       -      -
    107A  SER*     2.8    31.7    +      -       -      -
    108A  PRO*     4.4     7.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 104 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  THR*     3.2    38.7    +      -       +      +
    101A  GLY      4.3     2.9    -      -       -      -
    103A  GLN*     1.3    84.3    +      -       -      +
    105A  LEU*     1.3    50.2    +      -       -      +
    106A  ILE*     2.7    18.8    +      -       -      +
    108A  PRO*     3.7    25.6    -      -       +      -
    109A  THR      4.9    10.6    -      -       -      +
    110A  PRO*     6.4     1.6    -      -       +      -
    178A  ALA*     4.9     3.0    -      -       +      +
    179A  ASP*     4.4    21.0    +      -       +      +
    180A  ALA*     3.8    20.0    +      -       -      +
    183A  ALA*     4.9     9.0    -      -       +      +
----------------------------------------------------------
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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