Contacts of the helix formed by residues 408 - 432 (chain B) in PDB entry 2R8K


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 SER 408 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    407B  ASN*     1.3    85.0    +      -       -      +
    409B  ILE*     1.3    67.3    +      -       -      +
    410B  VAL*     2.9    21.0    +      -       -      +
    411B  ASP*     2.6    34.5    +      -       -      +
    412B  CYS*     3.3     9.4    +      -       -      -
    494B  TYR*     3.5    19.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 409 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    408B  SER*     1.3    75.3    -      -       -      +
    410B  VAL*     1.3    72.1    +      -       +      +
    412B  CYS*     3.8     2.3    -      -       -      +
    413B  ILE*     2.8    42.0    +      -       +      +
    481B  VAL*     3.4    27.8    -      -       +      +
    482B  THR*     3.8    17.7    -      -       +      +
    485B  ASP*     3.9    17.0    -      -       +      +
    494B  TYR*     3.6    21.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 410 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    408B  SER*     2.9    20.5    -      -       -      +
    409B  ILE*     1.3    88.2    -      -       +      +
    411B  ASP*     1.3    72.4    +      -       -      +
    412B  CYS      3.1     2.0    +      -       -      -
    413B  ILE*     3.2     9.8    +      -       -      +
    414B  SER*     2.8    33.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 411 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97B  LYS*     3.1    20.2    +      -       +      +
    405B  SER      2.7    24.0    -      -       -      +
    406B  CYS*     3.5    22.7    -      -       -      -
    407B  ASN*     3.7     7.9    -      -       -      +
    408B  SER*     2.6    29.4    +      -       -      +
    410B  VAL*     1.3    88.6    -      -       -      +
    412B  CYS*     1.3    63.6    +      -       -      +
    414B  SER*     3.3     9.6    -      -       -      -
    415B  TRP*     2.9    29.7    +      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 412 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406B  CYS*     3.5     8.9    -      -       -      -
    408B  SER      3.3    12.8    +      -       -      -
    409B  ILE*     3.8     8.7    -      -       -      +
    410B  VAL      3.1     0.2    -      -       -      -
    411B  ASP*     1.3    76.3    -      -       -      +
    413B  ILE*     1.3    65.8    +      -       +      +
    415B  TRP*     2.8     6.6    +      -       -      +
    416B  LEU*     2.7    26.2    +      -       -      +
    447B  LEU*     5.4     1.1    -      -       -      -
    481B  VAL*     3.2    33.7    -      -       +      -
    493B  TYR*     5.7     0.7    -      -       -      -
    494B  TYR*     4.0    13.7    -      -       -      -
    496B  LEU*     3.4    33.2    -      -       -      -
    499B  LEU*     4.0     8.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 413 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    409B  ILE*     2.8    33.7    -      -       +      +
    410B  VAL*     3.2    10.1    +      -       -      +
    412B  CYS*     1.3    78.9    -      -       +      +
    414B  SER*     1.3    59.6    +      -       -      +
    416B  LEU*     3.1    12.2    +      -       -      +
    417B  GLU*     2.8    40.2    +      -       +      +
    474B  LEU*     4.5     1.9    -      -       +      +
    478B  ILE*     3.3    30.3    -      -       +      -
    481B  VAL*     3.5    27.1    -      -       +      -
    482B  THR*     5.0     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 414 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97B  LYS*     4.3     8.5    -      -       -      -
     98B  GLY*     3.6    25.2    +      -       -      -
    410B  VAL*     2.8    24.8    +      -       -      +
    411B  ASP*     3.3    14.1    -      -       -      -
    413B  ILE*     1.3    77.8    -      -       -      +
    415B  TRP*     1.3    63.7    +      -       -      +
    417B  GLU*     3.0    31.2    +      -       -      +
    418B  VAL*     3.2     9.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 415 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  PHE      6.1     0.4    -      -       -      -
     97B  LYS*     3.1    41.0    -      -       +      +
    122B  GLU      3.8    11.0    -      -       -      -
    123B  ASP      4.2     9.2    -      -       -      -
    124B  HIS      4.3     1.3    -      -       -      -
    125B  LYS*     4.5    15.9    -      -       +      -
    399B  LYS*     3.5    48.2    -      -       +      -
    401B  LEU*     3.4    22.5    -      -       +      +
    405B  SER*     3.6    16.4    +      -       -      -
    406B  CYS*     3.9    13.3    -      -       +      +
    411B  ASP      2.9    24.0    +      -       -      -
    412B  CYS      2.8    10.1    +      -       -      +
    414B  SER*     1.3    72.7    -      -       -      +
    416B  LEU*     1.3    51.0    +      -       -      +
    418B  VAL*     2.7    25.1    +      -       +      +
    419B  PHE*     2.7    48.5    +      +       +      -
    499B  LEU*     3.6    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 416 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    412B  CYS      2.7    20.3    +      -       -      +
    413B  ILE*     3.2    11.4    -      -       -      +
    415B  TRP*     1.3    72.5    -      -       -      +
    417B  GLU*     1.3    51.8    +      -       -      +
    419B  PHE*     3.9    11.4    -      -       +      -
    420B  CYS*     2.7    38.5    +      -       -      -
    445B  ILE*     4.7    10.5    -      -       +      -
    474B  LEU*     3.6    13.5    -      -       +      -
    477B  GLY*     3.7    16.8    -      -       -      +
    478B  ILE*     3.8    15.7    -      -       +      -
    481B  VAL*     3.5    32.5    -      -       +      -
    499B  LEU*     4.1    24.2    -      -       +      -
    500B  SER      5.6     0.2    -      -       -      +
    501B  MET*     4.0    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 417 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98B  GLY*     2.6    34.4    -      -       -      +
     99B  GLU      4.3     3.4    -      -       -      +
    100B  ASP*     4.2    22.9    -      -       +      +
    413B  ILE*     2.8    27.1    +      -       +      +
    414B  SER*     3.0    11.9    +      -       -      +
    416B  LEU*     1.3    75.5    -      -       -      +
    418B  VAL*     1.3    62.3    +      -       -      +
    420B  CYS*     4.1     2.2    -      -       -      +
    421B  ALA*     3.1    24.3    +      -       -      +
    474B  LEU*     4.0    25.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 418 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  PHE*     3.5    29.5    -      -       +      -
     96B  LYS      3.5    17.7    -      -       -      +
     97B  LYS*     4.0     6.5    -      -       -      -
     98B  GLY      3.7     5.6    -      -       -      +
     99B  GLU      3.5    20.2    -      -       -      +
    125B  LYS*     4.4    21.1    -      -       +      -
    414B  SER      3.6    11.9    -      -       -      +
    415B  TRP*     2.7    23.4    +      -       +      +
    417B  GLU*     1.3    77.2    -      -       -      +
    419B  PHE*     1.3    63.2    +      -       +      +
    421B  ALA*     3.3     6.5    -      -       -      +
    422B  GLU*     3.1    20.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 419 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  LYS*     4.1    16.6    -      -       +      -
    397B  SER*     3.0    32.3    -      -       -      +
    398B  ASN*     3.2    24.9    -      -       -      -
    399B  LYS*     3.1    33.9    -      -       +      -
    415B  TRP*     2.7    47.6    +      +       +      -
    416B  LEU*     3.6    17.0    -      -       +      +
    418B  VAL*     1.3    69.6    -      -       +      +
    420B  CYS*     1.3    67.7    +      -       -      +
    422B  GLU*     2.9    15.0    +      -       -      +
    423B  LEU*     3.0    17.8    +      -       -      +
    499B  LEU*     3.7    22.0    -      -       +      -
    501B  MET*     4.4    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 420 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416B  LEU      2.7    27.1    +      -       -      +
    417B  GLU*     4.1     3.4    -      -       -      +
    419B  PHE*     1.3    73.4    -      -       -      +
    421B  ALA*     1.3    55.3    +      -       -      +
    423B  LEU*     3.3     7.6    +      -       -      +
    424B  THR*     2.9    36.1    +      -       -      +
    470B  SER*     5.2     6.1    -      -       -      +
    473B  LEU*     4.6     7.1    -      -       +      +
    474B  LEU*     3.2    47.3    -      -       +      +
    501B  MET*     3.3    30.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 421 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  PHE*     3.6    22.3    -      -       +      -
    100B  ASP*     4.0    20.2    -      -       +      +
    417B  GLU      3.1    19.2    +      -       -      +
    418B  VAL      3.3     6.3    -      -       -      +
    419B  PHE      3.0     0.6    -      -       -      -
    420B  CYS*     1.3    78.2    -      -       -      +
    422B  GLU*     1.3    56.8    +      -       -      +
    424B  THR*     3.3     7.2    +      -       -      -
    425B  SER*     3.0    27.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 422 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  PHE*     4.1    20.8    -      -       +      -
    125B  LYS*     3.1    37.5    +      -       +      +
    126B  VAL      3.7    14.9    -      -       -      +
    127B  SER*     4.9     2.4    -      -       -      -
    128B  LEU      6.3     0.2    -      -       -      -
    132B  ARG*     4.8     8.3    -      -       -      +
    397B  SER*     3.6    11.0    +      -       -      +
    418B  VAL      3.1     8.2    +      -       -      +
    419B  PHE      2.9     7.4    +      -       -      +
    421B  ALA*     1.3    79.3    -      -       -      +
    423B  LEU*     1.3    61.4    +      -       -      +
    425B  SER*     3.3     8.2    -      -       -      -
    426B  ARG*     2.6    53.5    +      -       -      +
      7T    T      4.0     7.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 423 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395B  MET*     4.5     3.1    -      -       +      -
    396B  MET      3.9    18.6    -      -       -      +
    397B  SER*     3.7    22.2    -      -       -      -
    419B  PHE      3.0    15.6    +      -       -      +
    420B  CYS*     3.7     6.3    -      -       -      +
    422B  GLU*     1.3    74.9    -      -       -      +
    424B  THR*     1.3    66.6    +      -       -      +
    425B  SER      3.0     1.6    -      -       -      -
    426B  ARG*     3.0    15.9    +      -       -      +
    427B  ILE*     2.9    28.0    +      -       -      +
    473B  LEU*     4.5     7.6    -      -       +      -
    501B  MET*     3.8    41.3    -      -       +      +
    503B  ILE*     3.9    38.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 424 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420B  CYS*     2.9    23.0    +      -       -      +
    421B  ALA*     3.7     7.4    -      -       -      -
    423B  LEU*     1.3    75.5    -      -       -      +
    425B  SER*     1.3    61.5    +      -       -      +
    427B  ILE*     3.3     2.3    +      -       -      +
    428B  GLN*     3.2    39.1    +      -       -      +
    469B  GLN*     3.4    27.5    +      -       +      +
    470B  SER*     3.5    34.3    +      -       -      +
    473B  LEU*     5.5     3.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 425 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  PHE*     5.6     4.5    -      -       -      -
    102B  TRP*     5.9     1.2    -      -       -      -
    129B  GLU*     2.9    31.5    +      -       -      +
    132B  ARG*     3.4    20.9    +      -       -      -
    421B  ALA      3.0    13.5    +      -       -      -
    422B  GLU*     3.3    15.3    -      -       -      -
    424B  THR*     1.3    77.7    -      -       -      +
    426B  ARG*     1.3    62.3    +      -       -      +
    428B  GLN*     3.3    10.2    +      -       -      +
    429B  ASP*     3.2    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 426 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  ARG*     3.5    37.9    -      -       -      +
    395B  MET*     3.2    24.9    -      -       +      +
    396B  MET      2.7    26.6    +      -       -      +
    422B  GLU*     2.6    47.3    +      -       -      +
    423B  LEU*     3.0    14.6    +      -       -      +
    425B  SER*     1.3    76.5    -      -       -      +
    427B  ILE*     1.3    65.6    +      -       -      +
    429B  ASP*     3.5     9.3    +      -       +      +
    430B  LEU*     3.2    26.2    +      -       -      +
      7T    T      3.3    17.3    +      -       -      -
      8T    C      2.5    30.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 427 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    395B  MET*     3.8    12.8    -      -       -      -
    423B  LEU      2.9    19.9    +      -       -      +
    424B  THR      3.5     1.8    -      -       -      +
    426B  ARG*     1.3    76.4    -      -       -      +
    428B  GLN*     1.3    67.2    +      -       -      +
    430B  LEU*     2.9    17.6    +      -       +      +
    431B  GLU*     3.0    22.9    +      -       +      +
    438B  VAL*     3.7    26.7    -      -       +      +
    440B  PRO*     4.6     7.9    -      -       +      -
    469B  GLN*     2.8    46.0    -      -       -      +
    473B  LEU*     6.4     0.4    -      -       +      -
    503B  ILE*     3.6    28.0    -      -       +      -
    506B  PHE*     4.1    10.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 428 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  TYR      5.6     6.3    -      -       -      +
    200A  ASP*     4.3    14.3    +      -       -      +
    129B  GLU*     6.1     0.2    -      -       -      +
    424B  THR*     3.2    27.6    +      -       -      +
    425B  SER*     3.4    11.7    -      -       -      +
    427B  ILE*     1.3    83.2    -      -       -      +
    429B  ASP*     1.3    63.0    +      -       -      +
    431B  GLU*     2.8    45.5    +      -       +      +
    432B  GLN*     3.2    17.9    +      -       +      +
    469B  GLN*     5.2     1.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 429 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132B  ARG*     3.0    40.6    -      -       -      +
    136B  ARG*     2.6    39.4    +      -       -      -
    151B  ARG*     5.0     4.6    +      -       -      -
    425B  SER      3.2     9.3    +      -       -      +
    426B  ARG*     3.5    15.7    -      -       +      +
    428B  GLN*     1.3    78.6    -      -       -      +
    430B  LEU*     1.3    64.4    +      -       +      +
    432B  GLN*     3.2    18.5    +      -       -      +
    433B  GLU*     3.4     5.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 430 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392B  VAL*     3.3    32.1    -      -       +      -
    395B  MET*     3.5    29.8    -      -       +      -
    426B  ARG      3.3     9.4    -      -       -      +
    427B  ILE*     2.9    10.6    +      -       +      +
    429B  ASP*     1.3    75.9    -      -       +      +
    431B  GLU*     1.3    57.7    +      -       -      +
    432B  GLN      2.8     4.7    -      -       -      -
    433B  GLU*     2.8    31.6    +      -       +      +
    434B  TYR*     2.9    46.8    +      -       +      +
    438B  VAL*     4.6     7.0    -      -       +      -
    506B  PHE*     4.3     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 431 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    200A  ASP*     3.7    14.4    -      -       -      +
    201A  ILE*     3.4    26.1    -      -       +      +
    202A  ASN*     5.8     1.2    +      -       -      -
    427B  ILE*     3.0    18.3    +      -       -      +
    428B  GLN*     2.8    34.5    +      -       +      +
    430B  LEU*     1.3    74.4    -      -       -      +
    432B  GLN*     1.3    57.2    +      -       -      +
    433B  GLU      3.5     0.2    -      -       -      -
    434B  TYR*     5.0     0.2    -      -       -      -
    435B  ASN*     3.2    22.8    +      -       -      +
    436B  LYS      3.5    17.9    -      -       -      +
    437B  ILE*     3.8     9.8    -      -       -      +
    438B  VAL*     3.1    38.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 432 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10A  ILE*     5.9     5.8    -      -       -      +
    197A  GLY*     4.1     6.2    -      -       -      +
    199A  TYR*     3.2    56.0    +      -       -      +
    201A  ILE*     3.8    12.8    -      -       +      +
    136B  ARG*     3.4    28.2    +      -       -      -
    140B  LYS*     4.1    14.0    -      -       -      +
    143B  LYS*     5.2     3.8    +      -       -      -
    428B  GLN*     3.2    17.0    +      -       +      +
    429B  ASP*     3.4     8.3    -      -       -      +
    430B  LEU      2.8     1.0    +      -       -      -
    431B  GLU*     1.3    80.8    -      -       +      +
    433B  GLU*     1.3    59.9    +      -       -      +
    434B  TYR      3.5     0.4    -      -       -      -
    435B  ASN*     4.1     6.5    +      -       -      +
----------------------------------------------------------
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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