Contacts of the helix formed by residues 65 - 89 (chain B) in PDB entry 1U8R


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 THR 65 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52B  GLY*     2.9    28.0    +      -       -      -
     53B  LEU      3.2     5.5    +      -       -      -
     54B  LEU*     3.3    33.0    -      -       -      +
     55B  ARG*     3.9    25.6    -      -       +      +
     64B  LEU*     1.3    74.3    -      -       -      +
     66B  GLU*     1.3    69.2    +      -       -      +
     67B  LYS*     3.4     3.5    +      -       -      +
     68B  GLY      3.2    10.4    +      -       -      -
     69B  ARG*     2.9    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  THR*     1.3    76.2    -      -       -      +
     67B  LYS*     1.3    62.6    +      -       -      +
     69B  ARG*     3.6     4.2    +      -       -      +
     70B  ALA*     3.4    19.8    +      -       -      +
     57H  ALA*     5.4     3.1    -      -       +      -
     58H  GLY*     4.7    21.2    +      -       -      +
     59H  ASP*     2.3    35.1    +      -       -      +
     61H  HIS*     4.6     5.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51B  ASP*     3.7    16.9    +      -       -      +
     52B  GLY      3.7    13.7    -      -       -      +
     53B  LEU*     4.0    14.4    -      -       +      +
     65B  THR*     3.1     7.7    +      -       -      +
     66B  GLU*     1.3    78.6    -      -       -      +
     68B  GLY*     1.3    65.9    +      -       -      +
     70B  ALA*     3.0    18.1    +      -       -      +
     71B  LEU*     3.2    13.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  LEU*     3.9    10.6    -      -       -      +
     53B  LEU*     3.2    38.0    +      -       -      +
     64B  LEU*     4.5     4.0    -      -       -      -
     65B  THR*     3.2     7.9    +      -       -      -
     67B  LYS*     1.3    79.8    -      -       -      +
     69B  ARG*     1.3    56.8    +      -       -      +
     71B  LEU*     3.5     3.7    +      -       -      +
     72B  ALA*     3.0    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  TYR*     4.4    15.7    -      -       +      -
     19B  GLU*     3.1    39.8    +      -       -      -
     63B  GLU*     5.7     2.4    +      -       -      -
     64B  LEU*     4.0    37.9    +      -       +      +
     65B  THR      2.9    16.8    +      -       -      +
     66B  GLU*     3.9     4.7    -      -       -      +
     68B  GLY*     1.3    73.5    -      -       -      +
     70B  ALA*     1.3    68.4    +      -       -      +
     72B  ALA*     3.1     1.7    +      -       +      +
     73B  ILE*     2.9    46.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  GLU*     3.4    11.6    +      -       -      +
     67B  LYS*     3.0    12.5    +      -       -      +
     69B  ARG*     1.3    79.0    -      -       -      +
     71B  LEU*     1.3    57.1    +      -       -      +
     73B  ILE*     3.5    10.9    +      -       -      +
     74B  ALA*     3.1    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8B  THR*     5.2     5.8    -      -       +      -
      9B  GLU*     4.1    18.6    -      -       +      +
     12B  LEU*     3.6    20.2    -      -       +      -
     53B  LEU*     4.8    12.1    -      -       +      -
     67B  LYS*     3.2     8.3    +      -       +      +
     68B  GLY*     3.7     7.6    -      -       -      +
     69B  ARG      3.2     0.4    -      -       -      -
     70B  ALA*     1.3    75.6    -      -       -      +
     72B  ALA*     1.3    66.8    +      -       -      +
     73B  ILE      3.1     1.6    -      -       -      -
     74B  ALA*     2.8    24.4    +      -       +      +
     75B  VAL*     2.9    30.5    +      -       +      +
     78B  LYS*     6.4     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  LEU*     4.1    29.3    -      -       +      +
     13B  ARG*     4.5     4.6    -      -       -      +
     16B  TYR*     4.3    13.8    -      -       +      -
     64B  LEU*     4.0    20.6    -      -       +      -
     68B  GLY      3.0    18.1    +      -       -      +
     69B  ARG*     3.5     5.2    -      -       -      +
     71B  LEU*     1.3    75.8    -      -       -      +
     73B  ILE*     1.3    61.6    +      -       -      +
     75B  VAL*     3.5     6.4    +      -       -      +
     76B  MET*     3.1    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16B  TYR*     4.0    22.4    -      -       +      +
     69B  ARG*     2.9    37.5    +      -       +      +
     70B  ALA*     3.6    11.0    -      -       -      +
     72B  ALA*     1.3    72.9    -      -       -      +
     74B  ALA*     1.3    69.5    +      -       -      +
     76B  MET*     2.9     9.2    +      -       -      +
     77B  ARG*     2.8    22.4    +      -       +      +
    133B  PRO*     3.5    10.8    -      -       +      -
    134B  GLY*     3.3    37.2    -      -       -      +
    137B  GLU*     4.9    11.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 74 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  ALA      3.1    11.1    +      -       -      +
     71B  LEU*     2.8    23.7    +      -       +      +
     73B  ILE*     1.3    80.2    -      -       -      +
     75B  VAL*     1.3    58.8    +      -       -      +
     77B  ARG*     3.3    28.7    +      -       -      +
     78B  LYS*     3.2    36.8    +      -       -      +
    110B  GLU*     5.9     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 75 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  GLU*     3.3    43.1    -      -       +      +
     12B  LEU*     5.9     0.4    -      -       +      -
     13B  ARG*     4.1    14.8    -      -       +      -
     71B  LEU*     2.9    24.1    +      -       +      +
     72B  ALA*     3.8     7.9    -      -       -      +
     74B  ALA*     1.3    76.1    -      -       +      +
     76B  MET*     1.3    57.8    -      -       -      +
     78B  LYS*     3.2    12.6    +      -       -      +
     79B  HIS*     2.9    27.0    +      -       -      +
    105B  GLU*     3.6    38.3    -      -       +      +
    106B  HIS*     4.5     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 76 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  ARG*     4.1    19.7    -      -       +      +
     16B  TYR*     3.5    31.2    -      -       +      -
     17B  ASP*     3.3    30.7    -      -       -      +
     20B  GLU*     4.0     0.9    -      -       -      +
     72B  ALA      3.1    11.8    +      -       -      +
     73B  ILE*     2.9    10.0    +      -       -      +
     75B  VAL*     1.3    78.1    -      -       -      +
     77B  ARG*     1.3    64.0    +      -       -      +
     79B  HIS*     3.4     8.3    +      -       -      +
     80B  ARG*     3.1    63.3    +      -       -      +
    133B  PRO*     3.7    18.8    -      -       +      -
    172B  GLU*     4.2     7.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 77 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  ILE*     2.8    11.5    +      -       -      +
     74B  ALA*     3.4    28.8    +      -       -      +
     75B  VAL      3.2     0.2    -      -       -      -
     76B  MET*     1.3    76.3    -      -       -      +
     78B  LYS*     1.3    65.4    +      -       -      +
     80B  ARG*     3.3     1.7    +      -       -      +
     81B  LEU*     2.9    28.7    +      -       +      +
    110B  GLU*     3.6    22.0    +      -       -      +
    113B  GLU*     2.6    35.8    +      -       -      +
    132B  ILE*     3.8    14.8    -      -       +      +
    133B  PRO*     3.4    22.8    -      -       -      +
    134B  GLY*     2.9    31.9    +      -       -      -
    135B  LEU*     4.5     1.3    -      -       +      +
    137B  GLU*     4.3     7.7    +      -       -      +
    138B  LEU*     3.2    35.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 78 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9B  GLU*     6.1     2.0    -      -       -      -
     71B  LEU*     6.4     0.4    -      -       -      -
     74B  ALA*     3.2    25.9    +      -       -      +
     75B  VAL*     3.6     8.1    -      -       -      +
     77B  ARG*     1.3    79.5    -      -       -      +
     79B  HIS*     1.3    66.2    +      -       -      +
     81B  LEU*     3.2     5.0    +      -       -      +
     82B  ALA*     2.9    26.3    +      -       -      +
    105B  GLU*     3.5    25.6    -      -       -      +
    106B  HIS      6.4     0.2    -      -       -      -
    107B  VAL      5.5     0.2    -      -       -      +
    108B  MET*     3.2    45.4    +      -       +      +
    110B  GLU*     4.2    11.9    +      -       -      +
    113B  GLU*     2.7    41.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 79 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13B  ARG*     4.2     4.5    -      -       -      -
     75B  VAL      2.9     9.1    +      -       -      +
     76B  MET*     3.4    16.8    -      -       -      +
     78B  LYS*     1.3    79.1    -      -       -      +
     80B  ARG*     1.3    61.7    +      -       +      +
     82B  ALA*     3.2     5.3    +      -       -      +
     83B  GLU*     2.9    41.4    +      -       -      +
     98B  HIS*     3.3    30.5    -      +       -      -
    101B  ALA*     3.5    17.6    +      -       +      +
    102B  CYS*     3.8     4.0    +      -       -      -
    105B  GLU*     3.2    35.9    +      -       -      +
    172B  GLU*     2.9    18.2    +      -       -      -
   2001B   CO      2.0    33.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 80 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20B  GLU*     2.8    39.2    +      -       -      -
     76B  MET*     3.1    43.1    +      -       -      +
     77B  ARG      4.0     0.9    -      -       -      +
     79B  HIS*     1.3    77.6    -      -       +      +
     81B  LEU*     1.3    67.0    +      -       -      +
     82B  ALA      3.1     1.6    -      -       -      -
     83B  GLU*     3.4    21.6    +      -       -      +
     84B  ARG*     3.1    24.8    +      -       -      +
    126B  SER*     3.8    11.6    -      -       -      -
    130B  ASN*     3.3    32.8    -      -       -      +
    131B  PRO*     2.8    31.6    +      -       -      +
    132B  ILE*     4.0    18.8    -      -       +      -
    133B  PRO*     4.2     2.9    -      -       -      +
    172B  GLU*     3.1    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 81 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  ARG*     2.9    24.3    +      -       +      +
     78B  LYS*     3.7     4.9    -      -       -      +
     80B  ARG*     1.3    76.5    -      -       -      +
     82B  ALA*     1.3    57.6    +      -       -      +
     84B  ARG*     3.1     6.9    -      -       -      +
     85B  LEU*     3.0    26.5    +      -       -      +
    108B  MET*     4.9     1.3    -      -       +      -
    113B  GLU*     3.6    41.3    -      -       +      +
    116B  LEU*     4.6    18.1    -      -       +      +
    117B  VAL*     4.4    23.1    -      -       +      +
    120B  LEU*     4.0     9.3    -      -       +      +
    123B  PRO*     4.0    18.6    -      -       +      -
    132B  ILE*     3.7    26.2    -      -       +      +
    135B  LEU*     5.2     1.3    -      -       +      -
    138B  LEU*     4.5     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 82 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78B  LYS      2.9    12.4    +      -       -      +
     79B  HIS*     3.2    11.7    -      -       -      +
     81B  LEU*     1.3    73.9    -      -       -      +
     83B  GLU*     1.3    60.5    +      -       -      +
     84B  ARG      3.0     1.6    -      -       -      -
     85B  LEU*     3.1     8.1    +      -       -      +
     86B  LEU*     2.8    36.2    +      -       +      +
    101B  ALA*     4.0    13.0    -      -       +      -
    104B  TRP*     4.5    20.6    -      -       +      -
    108B  MET*     4.0    18.5    -      -       -      -
    116B  LEU*     5.2     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 83 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79B  HIS*     2.9    26.7    +      -       -      +
     80B  ARG*     3.4    19.5    +      -       -      +
     82B  ALA*     1.3    75.5    -      -       -      +
     84B  ARG*     1.3    63.0    +      -       -      +
     86B  LEU*     3.3     9.2    +      -       -      +
     87B  VAL*     3.0    29.6    +      -       -      +
     97B  VAL*     4.2    10.3    -      -       +      +
     98B  HIS*     3.3    12.2    +      -       -      +
    101B  ALA*     3.5    13.7    -      -       +      +
    126B  SER*     3.8     9.4    +      -       -      -
    127B  PRO*     3.8    14.8    -      -       +      -
    128B  PHE*     4.0     7.6    -      -       -      -
    172B  GLU*     3.6     2.9    -      -       -      +
    175B  GLN*     2.7     9.5    -      -       -      +
   2001B   CO      1.8    33.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 84 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  ARG      3.1    13.6    +      -       -      +
     81B  LEU*     3.1    12.8    -      -       -      +
     82B  ALA      3.0     0.2    -      -       -      -
     83B  GLU*     1.3    76.6    -      -       -      +
     85B  LEU*     1.3    64.3    +      -       -      +
     87B  VAL*     3.7     1.4    -      -       -      +
     88B  ASP*     2.8    61.5    +      -       -      +
    120B  LEU*     3.3    16.6    -      -       +      -
    123B  PRO*     3.5    29.6    -      -       +      +
    125B  THR*     2.4    43.4    +      -       -      +
    126B  SER      3.0    19.0    +      -       -      -
    127B  PRO*     3.7    29.9    -      -       +      +
    132B  ILE*     4.8     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 85 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  LEU*     4.9     3.1    -      -       +      -
     89A  VAL*     5.3     1.3    -      -       +      -
     90A  ILE*     3.6    21.8    -      -       +      -
    104A  TRP*     4.9     3.6    -      -       +      -
     81B  LEU      3.0     7.3    +      -       -      +
     82B  ALA*     3.6     9.2    -      -       -      +
     84B  ARG*     1.3    79.1    -      -       -      +
     86B  LEU*     1.3    58.7    +      -       -      +
     89B  VAL*     3.1    36.7    +      -       +      -
     90B  ILE*     3.0    39.2    +      -       +      +
    104B  TRP*     4.5    21.3    -      -       +      -
    116B  LEU*     3.4    41.5    -      -       +      -
    119B  VAL*     5.6     1.1    -      -       +      -
    120B  LEU*     3.8     8.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 86 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  VAL*     4.1     5.2    -      -       +      -
     82B  ALA*     2.8    30.9    +      -       +      +
     83B  GLU      3.7     0.9    -      -       -      +
     85B  LEU*     1.3    72.8    -      -       -      +
     87B  VAL*     1.3    53.0    +      -       -      +
     90B  ILE*     3.4    14.9    -      -       +      +
     91B  GLY      2.8    11.1    +      -       -      -
     92B  LEU*     2.8    46.6    +      -       +      -
     97B  VAL*     3.4    43.5    -      -       +      +
    100B  GLU*     3.8    24.2    -      -       +      -
    101B  ALA*     4.0     7.6    -      -       +      +
    104B  TRP*     4.0    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 87 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83B  GLU      3.0    16.1    +      -       -      +
     84B  ARG*     3.9     2.5    -      -       -      +
     86B  LEU*     1.3    76.1    -      -       -      +
     88B  ASP*     1.3    78.0    +      -       -      +
     91B  GLY*     3.6    12.6    -      -       -      -
     92B  LEU      3.9    10.0    -      -       -      +
     94B  TRP*     4.2    16.6    -      -       +      +
     97B  VAL*     3.4    28.3    -      -       +      -
    127B  PRO*     3.9    26.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 88 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  ARG*     2.8    58.6    +      -       -      +
     87B  VAL*     1.3    85.9    -      -       -      +
     89B  VAL*     1.3    68.4    +      -       +      +
     91B  GLY*     4.5     1.2    +      -       -      -
    120B  LEU*     4.4    10.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 89 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85A  LEU*     5.2     0.4    -      -       +      -
     89A  VAL*     3.7    26.9    -      -       +      -
    115A  ARG*     5.2     0.5    +      -       -      -
    119A  VAL*     4.0    22.7    -      -       +      +
     85B  LEU*     3.1    29.3    +      -       +      -
     88B  ASP*     1.3    78.9    -      -       +      +
     90B  ILE*     1.3    73.3    +      -       +      +
     91B  GLY*     3.0     3.6    +      -       -      -
    119B  VAL*     4.8    10.5    -      -       +      +
    120B  LEU*     3.9    20.9    -      -       +      -
----------------------------------------------------------
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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