Contacts of the helix formed by residues 432 - 462 (chain B) in PDB entry 2BG9


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 ALA 432 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243B  PRO*     5.5     7.0    -      -       +      -
    307B  ARG*     5.7     2.0    -      -       -      +
    430B  TYR      3.7     1.8    +      -       -      -
    431B  VAL*     1.3    87.1    -      -       -      +
    433B  MET*     1.3    55.6    +      -       -      +
    434B  VAL*     3.4     2.6    -      -       -      +
    435B  ALA*     4.1    13.7    -      -       +      +
    436B  ASP*     2.4    53.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 433 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431B  VAL*     3.3    22.0    -      -       +      +
    432B  ALA*     1.3    79.3    -      -       -      +
    434B  VAL*     1.3    68.0    +      -       +      +
    436B  ASP*     3.4    12.1    +      -       +      +
    437B  ARG*     3.0    48.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 434 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304B  LEU*     3.8    18.6    -      -       +      -
    307B  ARG*     2.9    35.9    -      -       -      +
    431B  VAL*     6.2     0.9    -      -       +      -
    432B  ALA*     6.0     0.4    -      -       -      -
    433B  MET*     1.3    79.9    -      -       +      +
    435B  ALA*     1.3    58.6    +      -       -      +
    437B  ARG*     3.1     5.2    +      -       -      -
    438B  LEU*     2.5    63.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 435 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    242B  PRO*     4.5    12.3    -      -       +      -
    243B  PRO*     4.3    22.4    -      -       +      -
    304B  LEU*     4.4    19.0    -      -       +      +
    432B  ALA*     4.0    12.9    +      -       +      +
    433B  MET      3.4     0.2    -      -       -      -
    434B  VAL*     1.3    77.4    -      -       -      +
    436B  ASP*     1.3    60.1    +      -       -      +
    439B  PHE*     2.5    45.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 436 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243B  PRO*     4.5    10.4    -      -       -      +
    432B  ALA*     2.4    42.9    -      -       -      +
    433B  MET*     3.6    14.9    -      -       +      +
    434B  VAL      3.2     0.2    -      -       -      -
    435B  ALA*     1.3    74.9    -      -       -      +
    437B  ARG*     1.3    62.1    +      -       -      +
    439B  PHE*     3.7     7.2    -      -       -      -
    440B  LEU*     2.7    47.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 437 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    433B  MET*     3.0    35.4    +      -       +      +
    434B  VAL*     3.6     5.2    -      -       -      +
    436B  ASP*     1.3    84.0    -      -       -      +
    438B  LEU*     1.3    63.6    +      -       +      +
    440B  LEU*     3.3     8.4    +      -       -      +
    441B  TYR*     2.7    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 438 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304B  LEU*     4.2    15.3    -      -       +      -
    434B  VAL*     2.5    43.8    +      -       +      +
    437B  ARG*     1.3    74.3    -      -       +      +
    439B  PHE*     1.3    48.1    +      -       -      +
    440B  LEU      2.9     5.6    -      -       -      -
    441B  TYR*     3.0    41.7    -      -       +      -
    442B  ILE*     2.3    50.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 439 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236B  ILE*     4.8    16.8    -      -       +      -
    239B  PHE*     3.6    24.2    -      -       +      +
    240B  TYR*     4.6    30.1    -      +       -      -
    243B  PRO*     4.3    18.2    -      -       +      -
    304B  LEU*     5.6     0.4    -      -       -      +
    435B  ALA*     2.5    34.2    +      -       -      +
    436B  ASP*     3.8     3.8    -      -       -      +
    438B  LEU*     1.3    72.4    -      -       -      +
    440B  LEU*     1.3    78.5    +      -       +      +
    442B  ILE*     2.6    35.7    -      -       +      +
    443B  PHE*     2.9     4.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 440 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436B  ASP*     2.7    37.2    +      -       +      +
    437B  ARG*     3.4     6.5    -      -       -      +
    438B  LEU      2.9     0.4    -      -       -      -
    439B  PHE*     1.3   100.1    -      -       +      +
    441B  TYR*     1.3    49.9    +      -       -      +
    442B  ILE      2.8     5.4    -      -       -      -
    443B  PHE*     2.6    49.6    -      -       +      +
    444B  ILE*     2.7    15.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 441 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297B  LEU*     4.7    12.9    -      -       +      +
    300B  VAL*     5.5     8.5    -      -       +      -
    437B  ARG      2.7     9.6    +      -       -      +
    438B  LEU*     2.9    49.3    +      -       +      -
    440B  LEU*     1.3    76.2    -      -       -      +
    442B  ILE*     1.3    58.4    +      -       +      +
    444B  ILE*     2.7    19.9    -      -       +      +
    445B  THR*     2.4    65.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 442 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    236B  ILE*     5.5     2.0    -      -       +      -
    239B  PHE*     3.9    24.0    -      -       +      -
    297B  LEU*     3.9    18.4    -      -       +      -
    301B  VAL*     3.8    25.6    -      -       +      -
    304B  LEU*     5.1     3.8    -      -       +      -
    438B  LEU*     2.3    55.6    +      -       +      +
    439B  PHE*     2.6    40.2    -      -       +      +
    441B  TYR*     1.3    76.8    -      -       +      +
    443B  PHE*     1.3    52.8    +      -       -      +
    445B  THR*     4.3     4.9    -      -       -      -
    446B  MET*     2.7    58.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 443 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439B  PHE*     2.9     9.4    +      -       +      +
    440B  LEU*     2.6    47.6    -      -       +      +
    442B  ILE*     1.3    77.0    -      -       -      +
    444B  ILE*     1.3    58.8    +      -       +      -
    447B  CYS*     2.2    54.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 444 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    440B  LEU      2.7    11.1    +      -       -      +
    441B  TYR*     2.7    52.7    -      -       +      +
    443B  PHE*     1.3    77.4    -      -       +      +
    445B  THR*     1.3    59.1    +      -       -      +
    447B  CYS*     5.1     0.2    -      -       -      -
    448B  SER*     2.4    56.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 445 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293B  PHE*     5.8     0.9    -      -       +      -
    297B  LEU*     3.1    32.8    -      -       +      -
    441B  TYR*     2.4    61.3    +      -       -      +
    442B  ILE      4.0     0.9    -      -       -      -
    444B  ILE*     1.3    75.5    -      -       -      +
    446B  MET*     1.3    58.1    +      -       -      +
    448B  SER*     4.5     2.5    -      -       -      -
    449B  ILE*     2.6    58.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 446 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232B  SER*     4.8    16.6    -      -       -      +
    235B  ALA*     5.9     0.2    -      -       -      -
    236B  ILE*     3.7    43.5    -      -       +      -
    239B  PHE*     4.4     9.4    -      -       +      -
    297B  LEU*     5.5     4.0    -      -       +      -
    442B  ILE*     2.7    44.6    +      -       -      +
    443B  PHE*     4.7     0.2    -      -       -      -
    445B  THR*     1.3    79.7    -      -       +      +
    447B  CYS*     1.3    69.2    +      -       -      +
    449B  ILE*     3.7    12.8    -      -       +      +
    450B  GLY*     3.0    23.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 447 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443B  PHE*     2.2    56.7    +      -       +      +
    446B  MET*     1.3    92.4    -      -       -      +
    448B  SER*     1.3    61.2    +      -       -      +
    450B  GLY*     3.8     0.9    -      -       -      -
    451B  THR*     2.8    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 448 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444B  ILE*     2.4    51.2    +      -       -      +
    445B  THR*     3.5     2.9    -      -       -      -
    447B  CYS*     1.3    69.6    -      -       -      +
    449B  ILE*     1.3    65.5    +      -       -      +
    450B  GLY      2.8     4.4    +      -       -      -
    451B  THR*     3.0    10.9    +      -       -      +
    452B  PHE*     2.8    46.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 449 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290B  LEU*     3.9    10.9    -      -       +      +
    293B  PHE*     3.5    59.0    -      -       +      -
    294B  SER      5.3     0.7    -      -       -      +
    297B  LEU*     5.3     1.1    -      -       +      -
    445B  THR*     2.6    55.3    +      -       +      +
    446B  MET*     3.7     9.6    -      -       +      +
    448B  SER*     1.3    72.0    -      -       -      +
    450B  GLY*     1.3    61.3    +      -       -      +
    452B  PHE*     3.1    19.8    -      -       +      +
    453B  SER*     3.3    24.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 450 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290B  LEU*     4.8     5.4    -      -       -      -
    446B  MET      3.0    23.1    +      -       -      -
    447B  CYS*     4.7     0.2    -      -       -      -
    448B  SER      2.8     2.6    +      -       -      -
    449B  ILE*     1.3    76.6    -      -       -      +
    451B  THR*     1.3    50.9    +      -       -      -
    452B  PHE      3.0     4.7    +      -       -      -
    453B  SER*     3.7     3.8    +      -       -      -
    454B  ILE*     2.6    45.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 451 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447B  CYS      2.8    26.7    +      -       -      +
    448B  SER*     3.1    10.8    -      -       -      +
    450B  GLY*     1.3    72.7    -      -       -      +
    452B  PHE*     1.3    70.3    +      -       +      +
    454B  ILE*     3.4    23.7    -      -       -      +
    455B  PHE*     3.0    27.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 452 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293B  PHE*     6.1     0.2    -      +       -      -
    448B  SER*     2.8    46.4    -      -       -      -
    449B  ILE*     3.1    25.1    -      -       +      +
    450B  GLY      3.0     2.2    -      -       -      -
    451B  THR*     1.3    89.3    -      -       +      +
    453B  SER*     1.3    54.6    +      -       -      +
    454B  ILE      3.0     0.9    -      -       -      -
    455B  PHE*     2.8     8.9    +      -       +      +
    456B  LEU*     2.5    45.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 453 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286B  PHE*     3.3    18.8    -      -       -      -
    290B  LEU*     2.8    52.4    -      -       -      +
    449B  ILE      3.3     4.1    +      -       -      -
    450B  GLY      3.9     1.7    +      -       -      -
    452B  PHE*     1.3    76.1    -      -       -      +
    454B  ILE*     1.3    60.1    +      -       -      +
    456B  LEU*     3.8    10.7    -      -       -      +
    457B  ASP*     2.3    43.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 454 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450B  GLY*     2.6    29.0    +      -       -      +
    451B  THR*     3.4    24.9    -      -       -      +
    453B  SER*     1.3    75.1    +      -       -      +
    455B  PHE*     1.3    55.8    +      -       +      +
    457B  ASP*     3.7     5.6    -      -       -      +
    458B  ALA*     2.7    35.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 455 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  THR*     3.0    16.1    +      -       -      +
    452B  PHE*     2.8    15.5    +      -       +      +
    454B  ILE*     1.3    80.7    -      -       +      +
    456B  LEU*     1.3    60.8    +      -       +      -
    458B  ALA*     2.7    12.4    +      -       +      +
    459B  SER*     2.4    51.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 456 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    285B  MET*     6.0     4.0    -      -       +      -
    286B  PHE*     4.4    14.4    -      -       +      -
    452B  PHE*     2.5    33.0    +      -       +      +
    453B  SER*     3.7     9.9    -      -       -      +
    455B  PHE*     1.3    78.6    -      -       +      +
    457B  ASP*     1.3    53.9    +      -       -      +
    459B  SER*     2.5    12.9    +      -       -      +
    460B  HIS*     2.4    64.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 457 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283B  TYR*     4.7    11.8    -      -       -      +
    286B  PHE*     2.7    41.3    -      -       -      -
    287B  ILE*     5.3     0.2    -      -       -      +
    453B  SER*     2.3    43.4    +      -       -      +
    454B  ILE*     3.7     6.0    -      -       -      +
    456B  LEU*     1.3    72.7    -      -       -      +
    458B  ALA*     1.3    57.9    +      -       -      +
    460B  HIS*     3.2     7.9    +      -       -      -
    461B  ASN*     2.8    40.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 458 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454B  ILE*     2.7    24.1    +      -       +      +
    455B  PHE*     2.7    28.3    +      -       +      +
    457B  ASP*     1.3    71.7    -      -       -      +
    459B  SER*     1.3    53.2    +      -       -      +
    461B  ASN*     3.4     6.3    +      -       -      +
    462B  VAL*     2.5    36.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 459 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    455B  PHE*     2.4    40.1    +      -       -      -
    456B  LEU*     2.5    36.4    +      -       -      +
    458B  ALA*     1.3    67.2    -      -       -      +
    460B  HIS*     1.3    57.5    +      -       -      +
    463B  PRO*     2.4    54.6    -      -       -      +
    464B  PRO*     2.7     3.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 460 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  PHE*     3.0    22.7    -      -       +      +
    282B  SER*     3.3    34.3    +      -       -      +
    285B  MET*     5.2     6.2    -      -       +      +
    286B  PHE*     3.7    15.9    -      +       -      -
    456B  LEU*     2.4    67.4    +      -       +      +
    457B  ASP*     3.2    11.6    +      -       -      +
    459B  SER*     1.3    71.1    +      -       -      +
    461B  ASN*     1.3    62.0    +      -       -      +
    464B  PRO*     2.4    34.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 461 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137B  PHE*     2.6    50.4    -      -       +      -
    457B  ASP*     2.8    29.1    +      -       -      +
    458B  ALA*     4.1     6.6    +      -       -      +
    459B  SER      3.3     0.2    -      -       -      -
    460B  HIS*     1.3    76.5    -      -       -      +
    462B  VAL*     1.3    63.9    -      -       +      +
    465B  ASP*     3.3    19.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 462 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    458B  ALA*     2.5    29.4    -      -       +      +
    461B  ASN*     1.3    83.5    -      -       +      +
    463B  PRO*     1.3    65.7    -      -       +      +
    465B  ASP*     2.2    38.8    -      -       -      +
    466B  ASN*     4.7     0.3    +      -       -      -
----------------------------------------------------------
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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