Contacts of the helix formed by residues 1 - 30 (chain C) in PDB entry 2ONK


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 MET 1 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2C  ARG*     1.3    71.5    +      -       +      +
      3C  LEU*     3.2     8.1    -      -       -      +
      4C  LEU*     3.3    41.8    -      -       +      +
      5C  PHE*     4.1     1.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 2 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  PRO*     4.2    17.8    -      -       -      +
     68B  GLU*     3.2    31.1    +      -       -      +
     69B  ARG*     4.1    30.3    -      -       -      +
      1C  MET*     1.3    79.8    -      -       +      +
      3C  LEU*     1.3    62.1    +      -       +      +
      4C  LEU      3.0     2.2    -      -       -      -
      5C  PHE*     3.1     9.0    +      -       +      +
      6C  SER*     2.7    30.8    +      -       -      -
    163D  ARG*     4.7     4.9    -      -       -      +
    168D  SER*     4.9     7.5    -      -       -      -
    169D  PRO*     4.3    25.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 3 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET      3.2     5.5    -      -       -      +
      2C  ARG*     1.3    79.4    -      -       +      +
      4C  LEU*     1.3    58.2    +      -       +      +
      6C  SER*     3.7    14.6    -      -       -      +
      7C  ALA*     2.6    39.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 4 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET*     3.3    39.5    -      -       +      +
      2C  ARG      3.0     0.4    -      -       -      -
      3C  LEU*     1.3    82.5    -      -       +      +
      5C  PHE*     1.3    57.3    +      -       -      +
      7C  ALA*     4.2     3.0    -      -       +      +
      8C  LEU*     2.8    29.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 5 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1C  MET      4.1     0.8    +      -       -      +
      2C  ARG*     3.1    11.6    +      -       +      +
      4C  LEU*     1.3    75.0    -      -       -      +
      6C  SER*     1.3    68.2    +      -       -      +
      7C  ALA      3.1     1.3    -      -       -      -
      8C  LEU*     3.6    19.0    -      -       +      +
      9C  LEU*     3.1    64.6    +      -       +      +
     74D  TYR*     5.5     3.1    -      +       -      -
    169D  PRO*     4.3    12.8    -      -       +      -
    170D  LEU*     3.1    63.0    -      -       +      -
    173D  PHE*     3.9    23.6    -      +       +      -
    174D  PHE*     3.9     9.6    -      +       -      -
----------------------------------------------------------
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Residues in contact with SER 6 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      2C  ARG*     2.7    18.2    +      -       -      -
      3C  LEU*     3.9    16.9    -      -       -      +
      5C  PHE*     1.3    83.0    -      -       -      +
      7C  ALA*     1.3    57.4    +      -       -      +
      9C  LEU*     4.3     4.6    -      -       -      +
     10C  ALA*     3.3    22.1    +      -       -      +
     75D  ILE*     5.6     0.9    -      -       -      +
     79D  LYS*     4.0    21.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 7 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3C  LEU*     2.6    24.6    +      -       +      +
      4C  LEU*     4.2     3.8    -      -       +      +
      6C  SER*     1.3    73.6    -      -       -      +
      8C  LEU*     1.3    55.7    +      -       -      +
      9C  LEU      3.1     1.8    -      -       -      -
     10C  ALA*     3.5     6.2    -      -       -      +
     11C  LEU*     2.5    40.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 8 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      4C  LEU      2.8    21.0    +      -       -      +
      5C  PHE*     3.6    26.2    -      -       +      +
      7C  ALA*     1.3    76.4    -      -       -      +
      9C  LEU*     1.3    61.0    +      -       +      +
     11C  LEU*     3.6    10.5    -      -       +      +
     12C  LEU*     3.0    54.1    +      -       +      +
    174D  PHE*     6.3     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 9 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      5C  PHE*     3.1    58.9    +      -       +      +
      6C  SER*     4.3     5.4    -      -       -      +
      8C  LEU*     1.3    84.0    -      -       +      +
     10C  ALA*     1.3    56.7    +      -       -      +
     12C  LEU*     5.6     2.5    -      -       +      -
     13C  SER*     2.6    35.9    +      -       -      -
     71D  PRO*     3.7    30.3    -      -       +      +
     74D  TYR*     4.2    23.1    -      -       +      -
     75D  ILE*     4.3    17.4    -      -       +      +
     79D  LYS*     5.9     4.3    -      -       -      +
    173D  PHE*     4.9    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 10 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6C  SER      3.3    19.3    +      -       -      +
      7C  ALA*     3.0     8.4    +      -       -      +
      9C  LEU*     1.3    78.9    -      -       -      +
     11C  LEU*     1.3    57.5    +      -       -      +
     13C  SER*     3.0     7.2    +      -       -      -
     14C  SER*     2.9    31.2    +      -       -      -
     75D  ILE*     4.3     8.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 11 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7C  ALA*     2.5    22.3    +      -       +      +
      8C  LEU*     3.6    11.0    -      -       +      +
     10C  ALA*     1.3    69.6    -      -       -      +
     12C  LEU*     1.3    74.3    +      -       +      +
     14C  SER*     2.6    25.9    +      -       -      +
     15C  ILE*     3.1    26.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 12 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8C  LEU*     3.0    37.0    +      -       +      +
      9C  LEU*     3.9     3.1    -      -       +      +
     11C  LEU*     1.3    85.2    -      -       +      +
     13C  SER*     1.3    58.7    +      -       -      +
     15C  ILE*     3.2    17.0    +      -       +      +
     16C  ILE*     2.9    19.2    -      -       -      +
     67D  ILE*     3.6    22.0    -      -       +      +
     68D  PHE*     3.3    34.2    -      -       +      -
     71D  PRO*     3.9    21.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 13 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9C  LEU      2.6    24.6    +      -       -      -
     10C  ALA*     3.0    15.6    +      -       -      -
     12C  LEU*     1.3    72.5    -      -       -      +
     14C  SER*     1.3    59.6    +      -       -      +
     15C  ILE      3.0     5.6    -      -       -      -
     16C  ILE*     3.1    20.0    -      -       -      +
     17C  LEU*     3.3    21.1    -      -       -      +
     68D  PHE      4.1     2.0    +      -       -      -
     71D  PRO*     4.4     0.4    -      -       -      +
     72D  LEU*     3.5    41.9    -      -       -      +
     75D  ILE*     3.8     7.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 14 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10C  ALA      2.9    16.5    +      -       -      -
     11C  LEU*     2.6    31.0    +      -       -      +
     13C  SER*     1.3    74.7    +      -       -      +
     15C  ILE*     1.3    65.1    +      -       -      +
     17C  LEU*     3.8    13.9    -      -       -      +
     18C  LEU*     3.1    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 15 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11C  LEU*     3.1    35.0    -      -       +      +
     12C  LEU*     3.2    11.4    -      -       +      +
     13C  SER      3.0     0.4    -      -       -      -
     14C  SER*     1.3    77.3    -      -       -      +
     16C  ILE*     1.3    58.1    +      -       -      +
     17C  LEU      2.9     3.1    -      -       -      -
     18C  LEU*     2.6    35.8    +      -       +      +
     19C  PHE*     2.8    13.1    +      -       +      -
     68D  PHE*     3.6    28.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 16 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12C  LEU      2.9    27.1    -      -       -      +
     13C  SER*     3.1    18.6    -      -       -      +
     15C  ILE*     1.3    72.9    -      -       -      +
     17C  LEU*     1.3    60.7    +      -       -      +
     19C  PHE*     3.6    17.7    -      -       +      -
     20C  VAL*     3.0    28.4    +      -       -      +
     64D  ILE*     5.9     2.0    -      -       +      +
     65D  ALA*     5.9     2.2    -      -       -      -
     68D  PHE*     3.1    46.0    -      -       +      +
     69D  GLY*     4.2     5.6    -      -       -      +
     72D  LEU*     4.7    10.3    -      -       +      -
    136D  LEU*     5.0     7.0    -      -       +      -
    140D  VAL*     3.9    37.7    -      -       +      -
    144D  ILE*     5.5     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 17 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13C  SER*     3.3    24.3    +      -       -      +
     14C  SER*     3.8    11.2    -      -       -      +
     15C  ILE      2.8     1.0    +      -       -      -
     16C  ILE*     1.3    80.2    -      -       -      +
     18C  LEU*     1.3    59.7    +      -       +      +
     20C  VAL*     3.6     0.4    +      -       -      -
     21C  LEU*     2.9    28.8    +      -       -      +
     72D  LEU*     4.1    12.6    -      -       +      -
     87D  VAL*     3.8    39.9    -      -       +      +
     90D  ILE*     3.6    42.5    -      -       +      +
     91D  VAL*     4.1    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 18 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14C  SER*     3.1    17.0    -      -       -      +
     15C  ILE*     2.6    20.1    +      -       +      +
     17C  LEU*     1.3    73.2    -      -       +      +
     19C  PHE*     1.3    60.7    +      -       -      +
     21C  LEU*     4.0    14.1    -      -       +      -
     22C  LEU*     2.5    46.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 19 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15C  ILE*     2.8    10.4    +      -       +      +
     16C  ILE*     3.5    20.9    -      -       +      +
     18C  LEU*     1.3    76.4    -      -       -      +
     20C  VAL*     1.3    69.3    +      -       +      +
     22C  LEU*     5.0     1.8    -      -       -      -
     23C  PRO*     2.9    29.1    -      -       -      +
    106D  LEU*     4.4     4.5    -      -       +      -
    110D  PHE*     4.3    13.7    -      +       -      -
    133D  VAL*     3.4    52.5    -      -       +      -
    136D  LEU*     3.4    30.5    -      -       +      -
    137D  PHE*     3.4    33.8    -      +       +      -
    140D  VAL*     4.7     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 20 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16C  ILE      3.0    17.6    +      -       -      +
     17C  LEU      3.8     3.1    -      -       -      +
     19C  PHE*     1.3    89.9    -      -       +      +
     21C  LEU*     1.3    60.3    +      -       -      +
     23C  PRO*     4.3     0.2    -      -       -      -
     24C  VAL*     3.4    21.0    -      -       -      +
     90D  ILE*     3.3    28.3    -      -       +      +
     91D  VAL*     5.1     2.7    -      -       -      +
     93D  LEU*     3.4     5.9    -      -       +      +
     94D  PRO*     3.4    26.5    -      -       +      -
    137D  PHE*     3.6    17.3    -      -       +      +
    140D  VAL*     4.3    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 21 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17C  LEU      2.9    18.7    +      -       -      +
     18C  LEU*     2.8    18.2    +      -       +      +
     20C  VAL*     1.3    79.2    -      -       -      +
     22C  LEU*     1.3    68.1    +      -       -      +
     23C  PRO      3.3     0.5    -      -       -      -
     24C  VAL*     3.3     3.6    +      -       +      +
     25C  ALA*     2.7    42.4    +      -       +      +
     90D  ILE*     3.9    26.0    -      -       +      -
     93D  LEU*     3.9    19.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 22 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18C  LEU*     2.5    27.3    +      -       +      +
     19C  PHE*     4.4     2.2    -      -       -      +
     21C  LEU*     1.3    71.9    -      -       -      +
     23C  PRO*     1.3    63.9    -      -       +      +
     25C  ALA*     4.2     4.5    -      -       +      -
     26C  ALA*     2.6    49.0    +      -       +      +
    109D  VAL*     4.1    21.5    -      -       +      -
    115D  LEU*     5.1    15.0    -      -       +      -
    116D  ILE*     4.2    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 23 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19C  PHE      2.9    28.9    -      -       -      +
     20C  VAL      4.0     7.4    -      -       -      +
     21C  LEU      3.6     0.2    -      -       -      -
     22C  LEU*     1.3    89.7    -      -       +      +
     24C  VAL*     1.3    71.6    +      -       -      +
     26C  ALA*     3.0     4.7    +      -       -      +
     27C  THR*     2.9    21.9    +      -       -      +
    105D  ALA*     3.5    28.0    -      -       +      +
    106D  LEU*     4.0    14.8    -      -       +      +
    109D  VAL*     3.5    21.7    -      -       +      -
    110D  PHE*     5.7     2.7    -      -       +      -
    137D  PHE*     4.2    13.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 24 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20C  VAL      3.4    20.9    -      -       -      +
     21C  LEU*     3.8     3.8    -      -       +      +
     23C  PRO*     1.3    75.5    -      -       +      +
     25C  ALA*     1.3    66.6    +      -       -      +
     27C  THR*     3.5     4.0    +      -       -      -
     28C  VAL*     3.3    23.4    +      -       +      +
    237C  ILE*     3.5    40.6    -      -       +      -
    241C  LEU*     5.6     1.6    -      -       +      -
     93D  LEU*     3.9    21.1    -      -       +      -
     97D  ILE*     3.4    29.6    -      -       +      -
    105D  ALA*     4.1     4.9    -      -       +      +
    137D  PHE*     3.9    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 25 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21C  LEU*     2.7    45.4    +      -       +      +
     22C  LEU*     3.3     6.1    -      -       +      +
     23C  PRO      2.9     0.4    +      -       -      -
     24C  VAL*     1.3    72.6    -      -       -      +
     26C  ALA*     1.3    65.4    +      -       -      +
     28C  VAL*     2.9    17.6    +      -       -      +
     29C  THR*     2.9    17.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 26 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22C  LEU*     2.6    33.0    +      -       +      +
     23C  PRO*     3.0     4.9    +      -       +      +
     25C  ALA*     1.3    72.1    -      -       -      +
     27C  THR*     1.3    56.0    +      -       +      +
     29C  THR*     2.7    31.2    +      -       -      -
     30C  LEU*     2.9    23.0    +      -       +      +
    108D  VAL*     4.8     7.0    -      -       +      +
    109D  VAL*     4.6     9.4    -      -       +      -
    115D  LEU*     5.9     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 27 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23C  PRO      2.9    18.8    +      -       -      +
     24C  VAL      4.0     0.4    -      -       -      +
     26C  ALA*     1.3    74.5    -      -       -      +
     28C  VAL*     1.3    64.0    +      -       -      +
     30C  LEU*     3.7     2.1    +      -       -      +
     31C  GLN*     3.3    28.0    +      -       -      +
    230C  MET*     4.3    21.3    -      -       -      +
    233C  ALA*     4.9     6.1    -      -       -      +
    234C  ALA*     4.3     8.2    +      -       -      -
    237C  ILE*     3.3    22.0    -      -       -      +
    104D  ILE*     5.8     0.9    -      -       -      -
    105D  ALA*     3.5    33.9    -      -       +      -
    108D  VAL*     4.1    15.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 28 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     24C  VAL*     3.3    16.4    +      -       +      +
     25C  ALA*     2.9     7.4    +      -       -      +
     27C  THR*     1.3    74.6    +      -       -      +
     29C  THR*     1.3    69.4    +      -       -      +
     31C  GLN*     3.2    14.7    +      -       +      +
     32C  LEU*     4.6     3.5    -      -       -      +
     38C  PHE*     5.9     0.2    -      -       +      -
    234C  ALA*     4.0    13.5    -      -       +      -
    237C  ILE*     3.8    32.3    -      -       +      -
    238C  LEU*     3.3    38.1    -      -       +      -
    241C  LEU*     6.3     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 29 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25C  ALA*     2.9    18.3    +      -       -      +
     26C  ALA*     2.7    19.0    +      -       -      -
     28C  VAL*     1.3    72.8    -      -       -      +
     30C  LEU*     1.3    65.6    +      -       +      +
     31C  GLN      2.6    13.3    +      -       -      -
     32C  LEU*     2.9    35.3    +      -       +      +
     33C  PHE*     4.9     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 30 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26C  ALA*     2.9    17.2    +      -       +      +
     27C  THR      4.1     4.9    -      -       -      +
     29C  THR*     1.3    86.8    -      -       +      +
     31C  GLN*     1.3    59.4    +      -       -      +
     32C  LEU      2.9     8.1    +      -       -      -
     33C  PHE*     3.2    44.1    +      -       +      +
     34C  ASN*     3.7     8.8    +      -       -      +
    230C  MET*     4.0    25.4    -      -       +      -
    108D  VAL*     4.0    16.6    -      -       +      -
----------------------------------------------------------
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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