Contacts of the helix formed by residues 64 - 95 (chain B) in PDB entry 4DAJ


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 ILE 64 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  THR*     1.3    79.0    -      -       -      +
     65B  TRP*     1.3    56.9    +      -       -      +
     67B  VAL*     3.6     8.3    -      -       -      +
     68B  VAL*     2.9    30.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  THR      3.1     5.1    -      -       -      +
     64B  ILE*     1.3    77.9    -      -       -      +
     66B  GLN*     1.3    94.5    +      -       +      +
     68B  VAL*     3.1     8.5    +      -       -      +
     69B  PHE*     2.9    28.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  THR*     3.0    33.2    -      -       -      +
     65B  TRP*     1.3    98.1    -      -       +      +
     67B  VAL*     1.3    62.5    +      -       +      +
     69B  PHE*     2.8    27.9    +      -       +      +
     70B  ILE*     2.9     9.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  THR*     3.0    30.9    +      -       -      +
     64B  ILE*     3.6     9.0    -      -       -      +
     66B  GLN*     1.3    81.2    -      -       +      +
     68B  VAL*     1.3    65.1    +      -       -      +
     69B  PHE      3.1     0.3    +      -       -      -
     70B  ILE*     3.2     6.8    +      -       -      +
     71B  ALA*     2.9    21.3    +      -       -      +
    128B  ILE*     5.5     9.0    -      -       +      +
    129B  ILE*     4.9    25.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  ILE      2.9    17.8    +      -       -      +
     65B  TRP*     3.6     5.6    -      -       -      +
     67B  VAL*     1.3    77.3    -      -       -      +
     69B  PHE*     1.3    61.7    +      -       -      +
     71B  ALA*     3.3    19.5    -      -       +      +
     72B  PHE*     4.1     7.6    +      -       -      +
    129B  ILE*     5.9     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  TRP*     2.9    21.1    +      -       +      +
     66B  GLN*     2.8    25.1    +      -       +      +
     68B  VAL*     1.3    79.7    -      -       -      +
     70B  ILE*     1.3    60.5    +      -       -      +
     71B  ALA      3.2     0.9    +      -       -      -
     72B  PHE*     3.6     8.3    +      -       -      +
     73B  LEU*     3.8     6.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  GLN      2.9    13.4    +      -       -      +
     67B  VAL*     3.2     6.7    +      -       -      +
     69B  PHE*     1.3    71.3    -      -       -      +
     71B  ALA*     1.3    56.6    +      -       -      +
     72B  PHE      3.3     0.2    -      -       -      -
     73B  LEU*     2.7    47.9    +      -       +      +
     74B  THR*     3.0    12.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  VAL      2.9    13.3    +      -       -      +
     68B  VAL*     3.3    20.0    -      -       -      +
     69B  PHE      3.1     0.2    -      -       -      -
     70B  ILE*     1.3    76.2    -      -       -      +
     72B  PHE*     1.3    65.7    +      -       +      +
     74B  THR*     2.4    35.9    +      -       -      -
     75B  GLY*     3.3     0.7    +      -       -      -
    125B  THR*     3.6     8.1    -      -       -      +
    129B  ILE*     3.7    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  VAL      4.1     4.6    +      -       -      +
     69B  PHE      3.6     5.9    +      -       -      +
     70B  ILE      3.3     0.2    -      -       -      -
     71B  ALA*     1.3    85.5    -      -       +      +
     73B  LEU*     1.3    60.1    +      -       -      +
     74B  THR      3.2     0.2    -      -       -      -
     75B  GLY*     3.3    14.6    -      -       -      +
     76B  PHE*     2.9    23.7    +      -       -      +
     79B  LEU*     6.2     3.1    -      -       +      -
    129B  ILE*     6.1     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  PHE      3.8     4.6    +      -       -      +
     70B  ILE*     2.7    34.8    +      -       +      +
     72B  PHE*     1.3    76.0    -      -       -      +
     74B  THR*     1.3    59.8    +      -       +      +
     76B  PHE*     3.0    29.0    -      -       +      +
     77B  LEU*     3.0    35.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 74 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  ILE*     3.1    16.8    -      -       +      +
     71B  ALA*     2.4    25.8    +      -       -      +
     73B  LEU*     1.3    77.8    -      -       +      +
     75B  GLY*     1.3    59.6    +      -       -      +
     77B  LEU*     3.2     9.8    +      -       +      +
     78B  ALA*     2.8    32.4    +      -       -      +
    121B  MET      4.7     0.2    +      -       -      -
    125B  THR*     3.1    22.0    +      -       +      +
    128B  ILE*     6.0     2.0    -      -       +      -
    530B  TRP*     3.5    39.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 75 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  ALA      3.3     0.4    +      -       -      -
     72B  PHE*     3.3    25.4    +      -       -      -
     73B  LEU      3.1     0.6    -      -       -      -
     74B  THR*     1.3    83.7    +      -       -      +
     76B  PHE*     1.3    51.7    +      -       -      +
     78B  ALA*     3.2     5.9    +      -       -      +
     79B  LEU*     2.8    47.2    +      -       -      +
    122B  ASN*     5.4     5.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 76 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  PHE      2.9    12.3    +      -       -      +
     73B  LEU*     3.0    28.7    -      -       +      +
     75B  GLY*     1.3    76.4    -      -       -      +
     77B  LEU*     1.3    97.0    +      -       +      -
     79B  LEU*     3.8     8.3    -      -       -      +
     80B  VAL*     2.9    49.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 77 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  LEU*     3.0    28.5    +      -       +      +
     74B  THR*     3.2    12.8    +      -       -      +
     76B  PHE*     1.3   102.1    -      -       +      +
     78B  ALA*     1.3    57.7    +      -       -      +
     80B  VAL*     3.4     6.4    +      -       +      +
     81B  THR*     2.9    30.7    +      -       -      -
    121B  MET*     4.3    10.5    -      -       +      -
    530B  TRP*     4.8    10.3    -      -       +      -
    534B  ILE*     4.4    22.7    -      -       +      -
    537B  THR*     3.5    14.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 78 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74B  THR      2.8    20.2    +      -       -      +
     75B  GLY*     3.7     7.0    -      -       -      +
     77B  LEU*     1.3    71.5    -      -       -      +
     79B  LEU*     1.3    60.3    +      -       +      +
     81B  THR*     3.2     9.0    +      -       -      -
     82B  ILE*     2.9    34.6    +      -       +      +
    117B  GLY      4.5     6.5    -      -       -      +
    121B  MET*     3.9    32.6    -      -       +      +
    122B  ASN*     4.5    12.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 79 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  PHE*     6.2     3.8    -      -       +      -
     75B  GLY*     2.8    33.4    +      -       -      +
     76B  PHE*     3.8     6.5    -      -       -      +
     78B  ALA*     1.3    70.4    -      -       +      +
     80B  VAL*     1.3    66.1    +      -       +      +
     82B  ILE*     2.9    40.7    -      -       +      +
     83B  ILE*     2.9    21.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 80 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  PHE*     2.9    49.6    +      -       +      +
     77B  LEU*     3.5     6.7    -      -       +      +
     79B  LEU*     1.3    77.1    -      -       +      +
     81B  THR*     1.3    56.3    +      -       -      +
     83B  ILE*     3.4    15.4    -      -       +      +
     84B  GLY*     2.9    26.7    +      -       -      -
    537B  THR*     3.7    22.5    -      -       +      +
    540B  PRO*     5.7     0.2    -      -       -      +
    541B  VAL*     5.6     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 81 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  LEU      2.9    10.2    +      -       -      -
     78B  ALA      3.3     8.7    -      -       -      -
     79B  LEU      3.2     0.2    -      -       -      -
     80B  VAL*     1.3    76.6    -      -       -      +
     82B  ILE*     1.3    58.5    +      -       -      +
     84B  GLY*     3.2     1.4    +      -       -      -
     85B  ASN*     2.9    55.1    +      -       -      +
    113B  ASP      3.5    14.8    -      -       -      +
    117B  GLY*     4.2     3.6    -      -       -      -
    121B  MET*     3.5    20.2    -      -       -      -
    536B  SER*     3.8    16.4    -      -       -      +
    537B  THR*     2.5    33.9    +      -       -      +
    540B  PRO*     4.6     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 82 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  ALA*     2.9    16.5    +      -       +      +
     79B  LEU*     2.9    53.4    -      -       +      +
     81B  THR*     1.3    74.9    -      -       -      +
     83B  ILE*     1.3    63.2    +      -       +      +
     85B  ASN*     4.1     4.0    -      -       -      +
     86B  ILE*     2.9    32.4    +      -       -      +
    114B  LEU*     4.5    10.8    -      -       +      +
    117B  GLY*     4.0     7.0    -      -       -      +
    118B  VAL*     3.9    33.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 83 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79B  LEU*     2.9    27.3    +      -       +      +
     80B  VAL*     3.4    19.7    -      -       +      +
     82B  ILE*     1.3    81.0    -      -       +      +
     84B  GLY*     1.3    71.1    +      -       -      +
     86B  ILE*     3.1    12.3    -      -       +      +
     87B  LEU*     2.9    34.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 84 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  VAL      2.9    19.6    +      -       -      -
     81B  THR      3.7     0.4    -      -       -      -
     83B  ILE*     1.3    80.6    -      -       -      +
     85B  ASN*     1.3    57.5    +      -       -      +
     87B  LEU*     3.1    11.4    -      -       -      +
     88B  VAL*     2.9    27.4    +      -       -      +
    540B  PRO*     3.7    20.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 85 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81B  THR*     2.9    31.0    +      -       -      +
     82B  ILE      4.2     1.3    -      -       -      +
     84B  GLY*     1.3    72.1    -      -       -      +
     86B  ILE*     1.3    61.3    +      -       -      +
     88B  VAL*     2.9     9.8    +      -       -      +
     89B  ILE*     2.9    31.9    +      -       -      +
    110B  ALA*     3.3    30.7    -      -       -      +
    113B  ASP*     3.0    22.7    -      -       -      +
    114B  LEU*     3.0    31.0    -      -       +      +
    536B  SER      3.9     1.4    +      -       -      -
    540B  PRO*     2.8    24.6    -      -       -      +
    543B  TYR*     5.1     0.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 86 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  ILE      2.9    20.2    +      -       -      +
     83B  ILE*     3.1    23.3    -      -       +      +
     85B  ASN*     1.3    75.5    -      -       -      +
     87B  LEU*     1.3    65.0    +      -       +      +
     89B  ILE*     3.9     4.4    -      -       +      +
     90B  VAL*     2.9    49.4    +      -       +      +
    114B  LEU*     4.5    16.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 87 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  ILE*     2.9    27.7    +      -       +      +
     84B  GLY*     3.1    13.9    -      -       -      +
     86B  ILE*     1.3    79.4    -      -       +      +
     88B  VAL*     1.3    65.6    +      -       +      +
     90B  VAL*     4.7     5.8    -      -       +      -
     91B  ALA*     2.9    31.0    +      -       +      +
    554B  PHE*     4.6    32.3    -      -       +      +
    556B  THR      6.0     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 88 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  GLY      2.9    17.8    +      -       -      +
     85B  ASN*     2.9    14.2    +      -       -      +
     87B  LEU*     1.3    75.6    -      -       +      +
     89B  ILE*     1.3    57.1    +      -       -      +
     91B  ALA*     3.9     3.5    -      -       -      +
     92B  PHE*     2.9    35.1    +      -       +      +
    106B  LEU*     4.4     5.2    -      -       +      +
    107B  LEU*     4.8     5.8    -      -       -      -
    110B  ALA*     3.3    25.6    -      -       +      -
    540B  PRO*     4.0     8.1    -      -       +      +
    543B  TYR*     3.5    37.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 89 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85B  ASN      2.9    15.6    +      -       -      +
     86B  ILE*     3.9     7.4    -      -       +      +
     88B  VAL*     1.3    73.1    -      -       -      +
     90B  VAL*     1.3    70.5    +      -       +      +
     92B  PHE*     3.2     6.5    +      -       -      +
     93B  LYS*     2.9    27.8    +      -       +      +
    107B  LEU*     4.9    14.6    -      -       +      -
    110B  ALA*     4.6    10.3    -      -       +      -
    111B  CYS*     4.0    28.5    -      -       -      -
    114B  LEU*     3.5    30.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 90 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86B  ILE*     2.9    37.3    +      -       +      +
     87B  LEU*     4.0     7.0    -      -       +      +
     89B  ILE*     1.3    81.3    -      -       +      +
     91B  ALA*     1.3    66.4    +      -       -      +
     93B  LYS*     3.2     4.9    +      -       -      +
     94B  VAL*     2.9    33.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 91 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87B  LEU*     2.9    20.8    +      -       +      +
     88B  VAL*     3.9     3.1    -      -       -      +
     90B  VAL*     1.3    80.2    -      -       -      +
     92B  PHE*     1.3    62.2    +      -       -      +
     94B  VAL*     3.1    13.5    -      -       -      +
     95B  ASN*     2.9    26.7    +      -       -      +
     98B  LEU*     3.5     7.9    -      -       +      -
    550B  PHE*     6.0     1.1    -      -       -      +
    553B  THR*     3.8    26.7    -      -       +      +
    554B  PHE*     5.0     6.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 92 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88B  VAL*     2.9    23.2    +      -       +      +
     89B  ILE*     3.5     5.6    -      -       -      +
     91B  ALA*     1.3    76.6    -      -       -      +
     93B  LYS*     1.3    67.0    +      -       +      +
     95B  ASN      2.9    26.0    -      -       -      +
     98B  LEU*     2.8    40.3    -      -       +      +
     99B  LYS*     3.7    19.8    -      -       +      +
    100B  THR      4.5     0.2    -      -       -      -
    103B  ASN*     3.3    33.0    -      -       +      -
    104B  TYR*     4.0    23.6    -      +       -      -
    107B  LEU*     3.3    34.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89B  ILE*     2.9    21.6    +      -       +      +
     90B  VAL*     3.8     4.5    -      -       -      +
     92B  PHE*     1.3    84.5    -      -       +      +
     94B  VAL*     1.3    58.8    +      -       -      +
     95B  ASN      3.7     1.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90B  VAL*     2.9    23.7    +      -       +      +
     91B  ALA*     3.1    24.2    -      -       -      +
     92B  PHE      3.1     0.4    -      -       -      -
     93B  LYS*     1.3    77.4    -      -       -      +
     95B  ASN*     1.3    60.6    +      -       +      +
     96B  LYS      4.3     0.5    +      -       -      -
    553B  THR*     4.5     7.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  ALA      2.9    15.4    +      -       -      +
     92B  PHE      2.9    18.0    +      -       -      +
     93B  LYS      3.3     1.7    -      -       -      -
     94B  VAL*     1.3    80.3    -      -       +      +
     96B  LYS*     1.3    66.3    +      -       -      +
     97B  GLN*     2.6    39.0    +      -       -      +
     98B  LEU*     3.4    24.6    +      -       +      +
     99B  LYS*     3.6     5.5    +      -       -      +
    549B  THR*     4.4     3.8    -      -       -      +
    553B  THR*     3.0    32.1    +      -       +      +
----------------------------------------------------------
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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