Contacts of the helix formed by residues 65 - 89 (chain I) 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 I).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52I  GLY*     2.9    27.6    +      -       -      +
     53I  LEU      3.1     5.4    +      -       -      -
     54I  LEU*     3.3    33.7    -      -       -      +
     55I  ARG*     3.9    21.8    -      -       +      +
     64I  LEU*     1.3    75.8    -      -       -      +
     66I  GLU*     1.3    67.2    +      -       -      +
     67I  LYS*     3.3     3.3    +      -       -      +
     68I  GLY      3.1    10.9    +      -       -      -
     69I  ARG*     2.9    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 66 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65I  THR*     1.3    76.6    -      -       -      +
     67I  LYS*     1.3    62.0    +      -       -      +
     69I  ARG*     3.6     3.9    +      -       -      +
     70I  ALA*     3.3    19.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 67 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51I  ASP*     3.7    16.7    +      -       -      +
     52I  GLY      3.7    14.4    -      -       -      +
     53I  LEU*     3.9    15.7    -      -       +      +
     65I  THR*     3.2     7.1    +      -       -      +
     66I  GLU*     1.3    79.5    -      -       -      +
     68I  GLY*     1.3    66.6    +      -       -      +
     70I  ALA*     3.0    17.8    +      -       -      +
     71I  LEU*     3.2    14.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 68 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12I  LEU*     3.8    11.8    -      -       -      +
     53I  LEU*     3.2    38.5    -      -       -      +
     64I  LEU*     4.5     2.2    -      -       -      -
     65I  THR*     3.1     8.5    +      -       -      -
     67I  LYS*     1.3    80.1    -      -       -      +
     69I  ARG*     1.3    61.8    +      -       -      +
     71I  LEU*     3.4     2.6    +      -       -      +
     72I  ALA*     3.0    24.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 69 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16I  TYR*     4.3    17.1    -      -       +      -
     19I  GLU*     3.2    40.0    +      -       -      -
     63I  GLU*     5.7     2.6    +      -       -      -
     64I  LEU*     3.9    36.3    +      -       +      +
     65I  THR      2.9    16.3    +      -       -      +
     66I  GLU*     4.0     4.3    -      -       -      +
     68I  GLY*     1.3    72.6    -      -       -      +
     70I  ALA*     1.3    67.3    -      -       -      +
     72I  ALA*     3.2     1.5    +      -       +      +
     73I  ILE*     2.9    46.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 70 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66I  GLU*     3.3    11.3    +      -       -      +
     67I  LYS*     3.0    12.2    +      -       -      +
     69I  ARG*     1.3    79.6    -      -       -      +
     71I  LEU*     1.3    57.4    +      -       -      +
     73I  ILE*     3.5    11.8    -      -       -      +
     74I  ALA*     3.1    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 71 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8I  THR*     5.1     6.1    -      -       +      -
      9I  GLU*     3.9    18.8    -      -       +      +
     12I  LEU*     3.5    20.2    -      -       +      -
     53I  LEU*     4.7    13.9    -      -       +      -
     67I  LYS*     3.2     9.2    +      -       +      +
     68I  GLY*     3.6     7.9    -      -       -      +
     70I  ALA*     1.3    76.6    -      -       -      +
     72I  ALA*     1.3    67.2    +      -       -      +
     74I  ALA*     2.8    22.8    +      -       +      +
     75I  VAL*     2.9    30.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 72 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12I  LEU*     4.1    28.8    -      -       +      +
     13I  ARG*     4.6     3.6    -      -       -      +
     16I  TYR*     4.3    14.0    -      -       +      -
     64I  LEU*     4.0    20.2    -      -       +      -
     68I  GLY      3.0    14.5    +      -       -      +
     69I  ARG*     3.4     7.9    -      -       -      +
     71I  LEU*     1.3    76.4    -      -       -      +
     73I  ILE*     1.3    64.2    +      -       -      +
     75I  VAL*     3.1     7.6    +      -       -      +
     76I  MET*     3.0    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 73 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16I  TYR*     4.1    22.9    -      -       +      +
     69I  ARG*     2.9    37.9    +      -       +      +
     70I  ALA*     3.5    11.2    -      -       -      +
     72I  ALA*     1.3    73.8    -      -       -      +
     74I  ALA*     1.3    66.2    +      -       -      +
     76I  MET*     3.0     9.3    +      -       -      +
     77I  ARG*     2.8    22.8    +      -       +      +
    133I  PRO*     3.7     8.7    -      -       +      -
    134I  GLY*     3.3    37.0    -      -       -      +
    137I  GLU*     4.9    12.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 74 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70I  ALA      3.1    11.0    +      -       -      +
     71I  LEU*     2.8    21.7    +      -       +      +
     73I  ILE*     1.3    81.2    -      -       -      +
     75I  VAL*     1.3    59.2    +      -       -      +
     77I  ARG*     3.5    28.3    +      -       -      +
     78I  LYS*     3.1    36.2    +      -       -      +
    110I  GLU*     5.8     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 75 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9I  GLU*     3.5    37.9    -      -       +      +
     12I  LEU*     5.8     0.4    -      -       +      -
     13I  ARG*     3.9    16.6    -      -       +      -
     71I  LEU*     2.9    26.2    +      -       +      +
     72I  ALA*     3.4     9.0    -      -       -      +
     74I  ALA*     1.3    72.8    -      -       +      +
     76I  MET*     1.3    68.3    +      -       -      +
     78I  LYS*     3.2    12.7    +      -       -      +
     79I  HIS*     2.9    21.0    +      -       -      +
    105I  GLU*     3.6    36.4    -      -       +      +
    106I  HIS*     4.4     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 76 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13I  ARG*     3.6    24.4    -      -       +      +
     16I  TYR*     3.6    29.4    -      -       +      -
     17I  ASP*     3.5    21.8    -      -       -      +
     20I  GLU*     4.0     0.4    -      -       -      +
     72I  ALA      3.0     9.1    +      -       -      +
     73I  ILE*     3.0    10.6    +      -       -      +
     75I  VAL*     1.3    80.3    -      -       -      +
     77I  ARG*     1.3    62.7    -      -       -      +
     79I  HIS*     3.3    14.5    +      -       -      +
     80I  ARG*     3.0    69.0    +      -       -      +
    133I  PRO*     3.7    20.0    -      -       +      -
    172I  GLU*     4.0     1.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 77 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73I  ILE*     2.8    15.6    +      -       -      +
     74I  ALA*     3.6    24.3    +      -       -      +
     76I  MET*     1.3    75.3    -      -       -      +
     78I  LYS*     1.3    63.8    +      -       -      +
     80I  ARG*     3.9     1.6    -      -       -      +
     81I  LEU*     3.0    32.8    +      -       +      +
    110I  GLU*     3.5    23.4    +      -       -      +
    113I  GLU*     2.6    34.5    +      -       -      +
    132I  ILE*     3.8    15.6    -      -       +      +
    133I  PRO*     3.5    22.6    -      -       -      +
    134I  GLY*     2.6    40.2    +      -       -      -
    135I  LEU*     4.4     1.8    -      -       -      +
    137I  GLU*     4.3     8.3    -      -       -      +
    138I  LEU*     3.2    36.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 78 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9I  GLU*     6.5     0.7    -      -       -      -
     74I  ALA*     3.1    26.2    -      -       -      +
     75I  VAL*     3.2     7.1    +      -       -      +
     77I  ARG*     1.3    76.4    -      -       -      +
     79I  HIS*     1.3    66.7    +      -       -      +
     81I  LEU*     3.2     3.5    +      -       -      +
     82I  ALA*     2.9    26.9    +      -       -      +
    105I  GLU*     3.3    27.4    -      -       -      +
    106I  HIS      6.4     0.2    -      -       -      -
    107I  VAL      5.5     0.2    -      -       -      +
    108I  MET*     3.0    47.2    +      -       +      +
    109I  SER*     4.6     0.2    -      -       -      +
    110I  GLU*     3.9    15.0    +      -       -      +
    113I  GLU*     2.6    41.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 79 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13I  ARG*     4.4     3.8    -      -       -      -
     75I  VAL      2.9     8.4    +      -       -      +
     76I  MET*     3.4    16.8    -      -       -      +
     78I  LYS*     1.3    78.6    -      -       -      +
     80I  ARG*     1.3    63.4    +      -       +      +
     82I  ALA*     3.3     5.2    +      -       -      +
     83I  GLU*     3.1    34.4    +      -       -      +
     98I  HIS*     3.2    20.6    -      +       -      -
    101I  ALA*     3.3    36.7    +      -       +      +
    102I  CYS*     3.8     4.3    -      -       -      -
    105I  GLU*     3.1    31.3    +      -       -      +
    172I  GLU*     2.7    23.2    +      -       +      +
   7001I   CO      2.2    31.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 80 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16I  TYR*     5.5     0.2    +      -       -      -
     20I  GLU*     2.8    39.6    +      -       -      -
     76I  MET*     3.0    46.8    +      -       -      +
     77I  ARG      4.1     1.1    -      -       -      +
     79I  HIS*     1.3    74.0    -      -       +      +
     81I  LEU*     1.3    65.6    +      -       -      +
     82I  ALA      3.0     1.8    -      -       -      -
     83I  GLU*     3.3    14.8    +      -       -      +
     84I  ARG*     3.0    24.3    +      -       -      +
    126I  SER*     3.8    20.5    -      -       -      -
    130I  ASN*     3.3    33.1    -      -       -      +
    131I  PRO*     3.0    29.7    +      -       -      +
    132I  ILE*     4.1    15.7    -      -       +      -
    133I  PRO*     4.3     3.0    -      -       -      +
    172I  GLU*     3.0    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 81 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77I  ARG*     3.0    24.6    +      -       +      +
     78I  LYS*     3.8     4.3    -      -       -      +
     80I  ARG*     1.3    77.0    -      -       -      +
     82I  ALA*     1.3    57.0    +      -       -      +
     84I  ARG*     3.2     6.7    -      -       -      +
     85I  LEU*     3.0    26.2    +      -       -      +
    108I  MET*     4.9     1.1    -      -       +      -
    113I  GLU*     3.6    48.0    -      -       +      +
    116I  LEU*     4.6    13.1    -      -       +      +
    117I  VAL*     4.4    22.9    -      -       +      +
    120I  LEU*     4.0     8.3    -      -       +      +
    123I  PRO*     4.1    17.7    -      -       +      -
    132I  ILE*     3.7    26.7    -      -       +      -
    135I  LEU*     5.2     1.6    -      -       +      -
    138I  LEU*     4.6     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 82 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     78I  LYS      2.9    18.1    +      -       -      +
     79I  HIS*     3.3     6.7    -      -       -      +
     81I  LEU*     1.3    74.5    -      -       -      +
     83I  GLU*     1.3    59.7    +      -       -      +
     84I  ARG      3.1     1.3    -      -       -      -
     85I  LEU*     3.2     7.4    +      -       -      +
     86I  LEU*     2.8    36.2    +      -       +      +
    101I  ALA*     4.1    12.6    -      -       +      -
    104I  TRP*     4.5    21.8    -      -       +      -
    108I  MET*     4.0    17.7    -      -       -      -
    116I  LEU*     5.3     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 83 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79I  HIS*     3.1    24.8    +      -       -      +
     80I  ARG*     3.3     7.3    +      -       -      +
     82I  ALA*     1.3    75.6    -      -       -      +
     84I  ARG*     1.3    62.5    +      -       -      +
     86I  LEU*     3.8     8.8    -      -       -      +
     87I  VAL*     3.1    21.5    +      -       -      +
     97I  VAL*     4.3     9.6    -      -       +      +
     98I  HIS*     3.2    13.1    +      -       -      +
    101I  ALA*     3.5    14.1    -      -       +      +
    126I  SER*     3.7    19.8    -      -       -      -
    127I  PRO*     3.5    21.9    -      -       +      +
    128I  PHE*     3.9     7.2    -      -       -      -
    172I  GLU*     3.8     4.0    -      -       -      +
    175I  GLN*     2.6    12.0    +      -       -      +
   7001I   CO      2.1    32.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 84 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80I  ARG      3.0    13.5    +      -       -      +
     81I  LEU*     3.2    13.2    -      -       -      +
     82I  ALA      3.1     0.2    -      -       -      -
     83I  GLU*     1.3    79.0    -      -       -      +
     85I  LEU*     1.3    65.4    +      -       -      +
     87I  VAL*     3.8     1.1    -      -       -      +
     88I  ASP*     2.7    61.4    +      -       -      +
    120I  LEU*     3.4    15.5    -      -       +      -
    123I  PRO*     3.6    30.8    -      -       +      +
    125I  THR*     2.5    52.3    +      -       -      +
    126I  SER      3.3     9.1    +      -       -      -
    127I  PRO*     3.7    31.4    -      -       +      +
    132I  ILE*     4.7     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 85 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81I  LEU      3.0    10.0    +      -       -      +
     82I  ALA*     3.2     9.4    +      -       -      +
     84I  ARG*     1.3    78.9    -      -       -      +
     86I  LEU*     1.3    62.0    +      -       +      +
     89I  VAL*     3.1    36.0    +      -       +      +
     90I  ILE*     3.0    36.8    +      -       +      -
    104I  TRP*     4.4    22.0    -      -       +      -
    116I  LEU*     3.5    31.6    -      -       +      -
    119I  VAL*     5.6     1.6    -      -       +      -
    120I  LEU*     3.8     9.5    -      -       +      +
     85J  LEU*     4.8     2.5    -      -       +      -
     89J  VAL*     5.3     2.2    -      -       +      -
     90J  ILE*     3.5    29.6    -      -       +      -
    104J  TRP*     5.0     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 86 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82I  ALA*     2.8    33.6    +      -       +      +
     83I  GLU*     3.8     1.8    -      -       -      +
     85I  LEU*     1.3    72.4    -      -       +      +
     87I  VAL*     1.3    57.9    +      -       -      +
     90I  ILE*     3.4    13.9    -      -       +      +
     91I  GLY      2.8    26.5    +      -       -      -
     92I  LEU*     2.9    27.7    +      -       +      -
     97I  VAL*     3.4    42.8    -      -       +      +
    100I  GLU*     4.0    15.0    -      -       +      -
    101I  ALA*     4.1     7.2    -      -       +      +
    104I  TRP*     3.9    35.2    -      -       +      -
    112J  VAL*     4.3     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 87 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83I  GLU      3.1    17.0    +      -       -      +
     84I  ARG*     3.9     2.5    -      -       -      +
     86I  LEU*     1.3    80.0    -      -       -      +
     88I  ASP*     1.3    76.6    +      -       -      +
     91I  GLY*     3.4    14.4    -      -       -      -
     92I  LEU      3.9     9.9    -      -       -      +
     94I  TRP*     4.2    16.6    -      -       +      -
     97I  VAL*     3.4    28.5    -      -       +      -
    127I  PRO*     3.9    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 88 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84I  ARG*     2.7    60.9    +      -       -      +
     87I  VAL*     1.3    85.6    -      -       -      +
     89I  VAL*     1.3    68.5    +      -       +      +
     91I  GLY*     4.4     1.7    +      -       -      -
    120I  LEU*     4.4    10.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 89 (chain I). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85I  LEU*     3.1    29.0    +      -       +      -
     88I  ASP*     1.3    76.3    -      -       +      +
     90I  ILE*     1.3    72.9    +      -       +      +
     91I  GLY*     3.1     2.7    +      -       -      -
    119I  VAL*     4.8     9.9    -      -       +      +
    120I  LEU*     3.8    21.8    -      -       +      -
     89J  VAL*     3.6    28.5    -      -       +      -
    115J  ARG*     5.4     0.3    +      -       -      -
    119J  VAL*     4.0    22.7    -      -       +      +
----------------------------------------------------------
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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