Contacts of the helix formed by residues 430 - 459 (chain B) in PDB entry 1OH7


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 ASN 430 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425B  ILE*     5.6     0.4    -      -       -      +
    426B  ALA      5.1     0.6    +      -       -      -
    428B  GLY      3.6     0.9    -      -       -      -
    429B  TYR*     1.3    82.3    -      -       +      +
    431B  GLU*     1.3    67.3    +      -       -      +
    432B  GLU*     2.9    28.0    +      -       -      +
    433B  LEU*     2.9    23.1    +      -       +      +
    434B  ASP*     3.6    18.2    +      -       -      +
    523B  LEU*     3.7     7.0    -      -       -      +
    527B  LEU*     3.7    42.8    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    430B  ASN*     1.3    76.0    +      -       -      +
    432B  GLU*     1.3    66.8    +      -       +      +
    433B  LEU      3.2     0.3    +      -       -      -
    434B  ASP*     3.3    12.3    +      -       -      +
    435B  GLU*     3.3    37.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 432 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    430B  ASN*     2.9    18.5    +      -       -      +
    431B  GLU*     1.3    76.0    -      -       +      +
    433B  LEU*     1.3    56.1    +      -       -      +
    435B  GLU*     3.1    18.7    +      -       -      +
    436B  TRP*     2.9    52.2    +      -       +      +
    523B  LEU*     3.5    26.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 433 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425B  ILE*     3.5    34.3    -      -       +      -
    426B  ALA      4.7     3.4    -      -       -      +
    430B  ASN*     2.9    22.8    +      -       +      +
    431B  GLU      3.2     0.2    +      -       -      -
    432B  GLU*     1.3    76.2    -      -       -      +
    434B  ASP*     1.3    58.9    +      -       -      +
    436B  TRP*     3.5     4.1    +      -       -      +
    437B  ARG*     3.1    62.4    +      -       -      +
    520B  ALA*     3.1    42.4    -      -       +      +
    523B  LEU*     3.6    15.5    -      -       +      +
    524B  GLU*     3.8     8.1    -      -       +      +
    527B  LEU*     4.1     5.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 434 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426B  ALA      4.4     2.6    -      -       -      +
    427B  SER*     4.1     8.4    +      -       -      -
    428B  GLY*     3.1    38.5    +      -       -      -
    430B  ASN      3.6    12.2    +      -       -      +
    431B  GLU*     3.3     8.9    +      -       -      +
    433B  LEU*     1.3    79.1    -      -       -      +
    435B  GLU*     1.3    58.3    +      -       +      +
    437B  ARG*     3.4    14.4    +      -       -      +
    438B  ALA*     2.9    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 435 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431B  GLU*     3.3    40.2    +      -       +      +
    432B  GLU*     3.1    18.9    +      -       -      +
    434B  ASP*     1.3    77.5    -      -       +      +
    436B  TRP*     1.3    66.2    +      -       +      +
    438B  ALA*     3.4     5.1    +      -       -      +
    439B  LEU*     3.1    35.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 436 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    432B  GLU*     2.9    52.3    +      -       +      +
    433B  LEU*     3.5     2.4    +      -       -      +
    435B  GLU*     1.3    79.5    +      -       +      +
    437B  ARG*     1.3    57.6    +      -       -      +
    439B  LEU*     3.9    17.5    -      -       +      -
    440B  ALA*     3.1    21.0    +      -       -      +
    516B  SER*     3.3    31.7    +      -       -      +
    519B  LYS*     3.4    54.3    -      -       +      +
    520B  ALA*     3.8    22.7    -      -       +      -
    523B  LEU*     4.5     9.4    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    423B  GLY*     4.5     7.9    -      -       -      +
    425B  ILE      3.1    29.3    +      -       -      +
    426B  ALA      4.2     9.9    +      -       -      -
    427B  SER*     4.3     6.7    +      -       -      +
    433B  LEU*     3.1    43.6    +      -       -      +
    434B  ASP*     3.8    13.7    +      -       -      +
    435B  GLU      3.2     0.2    -      -       -      -
    436B  TRP*     1.3    75.8    -      -       -      +
    438B  ALA*     1.3    60.6    +      -       -      +
    440B  ALA*     3.6     7.2    -      -       -      +
    441B  ASP*     3.0    39.5    +      -       -      +
    520B  ALA*     4.3    13.1    -      -       +      +
    524B  GLU*     3.1    33.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 438 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434B  ASP      2.9    18.8    +      -       -      +
    435B  GLU*     3.8     6.3    -      -       -      +
    437B  ARG*     1.3    75.1    -      -       -      +
    439B  LEU*     1.3    62.4    +      -       +      +
    441B  ASP*     3.9     6.3    -      -       -      +
    442B  GLY*     2.9    25.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 439 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435B  GLU*     3.1    23.4    +      -       +      +
    436B  TRP*     3.8    27.4    -      -       +      +
    438B  ALA*     1.3    76.7    -      -       +      +
    440B  ALA*     1.3    62.9    +      -       -      +
    442B  GLY*     3.5     1.1    +      -       -      -
    443B  ALA*     3.1    24.6    +      -       -      +
    512B  LYS*     4.9     1.8    -      -       -      +
    516B  SER*     3.2    14.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 440 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436B  TRP      3.1    17.9    +      -       -      +
    437B  ARG*     3.6     9.0    -      -       -      +
    438B  ALA      3.3     0.2    -      -       -      -
    439B  LEU*     1.3    77.0    -      -       -      +
    441B  ASP*     1.3    58.6    +      -       -      +
    443B  ALA*     3.2     7.6    +      -       -      +
    444B  THR*     2.8    35.1    +      -       -      +
    513B  VAL*     4.3     5.2    -      -       -      +
    516B  SER*     3.6    16.3    +      -       -      -
    517B  LYS*     4.2    25.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 441 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    437B  ARG*     3.0    27.6    +      -       -      +
    438B  ALA*     3.9     6.4    -      -       -      +
    440B  ALA*     1.3    79.0    -      -       -      +
    442B  GLY*     1.3    52.0    +      -       -      +
    444B  THR*     3.2     9.2    +      -       -      +
    445B  ASP*     2.7    46.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 442 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438B  ALA      2.9    18.0    +      -       -      -
    439B  LEU*     3.9     2.0    -      -       -      -
    441B  ASP*     1.3    72.6    -      -       -      +
    443B  ALA*     1.3    58.3    +      -       -      +
    445B  ASP*     3.8    10.5    -      -       -      +
    446B  TYR*     3.3    22.0    +      -       -      +
    449B  ARG*     5.4     1.4    +      -       -      -
    509B  TYR*     5.2     1.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 443 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439B  LEU      3.1    17.4    +      -       -      +
    440B  ALA      3.5     5.4    -      -       -      +
    441B  ASP      3.2     0.2    -      -       -      -
    442B  GLY*     1.3    77.9    -      -       -      +
    444B  THR*     1.3    59.4    +      -       -      +
    445B  ASP      3.2     0.2    -      -       -      -
    446B  TYR*     3.4     5.0    -      -       -      +
    447B  LEU*     3.4    26.7    +      -       -      +
    509B  TYR*     4.2    13.8    -      -       +      +
    512B  LYS*     3.7    26.5    -      -       +      -
    513B  VAL*     3.5    21.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 444 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    440B  ALA      2.8    22.4    +      -       -      -
    441B  ASP*     3.6    11.2    +      -       -      +
    443B  ALA*     1.3    73.6    -      -       -      +
    445B  ASP*     1.3    64.0    +      -       -      +
    447B  LEU*     3.6     7.4    +      -       +      +
    448B  GLU*     3.3    36.7    +      -       -      +
    473B  TYR*     4.2     9.9    +      -       +      +
    513B  VAL*     3.7    22.7    -      -       -      +
    517B  LYS*     5.0     5.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 445 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441B  ASP*     2.7    28.7    +      -       -      +
    442B  GLY*     4.1     9.3    -      -       -      +
    444B  THR*     1.3    75.9    -      -       -      +
    446B  TYR*     1.3    65.2    +      -       -      +
    447B  LEU      3.1     2.2    +      -       -      -
    448B  GLU*     3.2    27.9    +      -       -      +
    449B  ARG*     3.2    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 446 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442B  GLY      3.3    14.0    +      -       -      +
    443B  ALA      3.4    11.4    -      -       -      +
    445B  ASP*     1.3    78.2    -      -       -      +
    447B  LEU*     1.3    59.5    +      -       +      +
    449B  ARG*     3.2    28.9    +      -       -      +
    450B  LEU*     2.8    34.8    +      -       +      -
    453B  ARG*     3.5    24.9    +      -       -      -
    505B  GLU*     2.8    29.2    +      -       -      +
    509B  TYR*     3.3    55.1    +      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 447 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443B  ALA      3.4    18.7    +      -       -      +
    444B  THR*     4.0     6.7    -      -       -      +
    445B  ASP      3.1     1.4    -      -       -      -
    446B  TYR*     1.3    77.1    -      -       +      +
    448B  GLU*     1.3    67.6    +      -       -      +
    449B  ARG      3.1     0.9    -      -       -      -
    450B  LEU*     3.6    18.1    -      -       +      +
    451B  GLU*     3.2    20.8    +      -       -      +
    465B  VAL*     4.0    13.1    -      -       +      +
    473B  TYR*     3.9    42.8    -      -       +      -
    506B  LEU*     3.8    31.9    -      -       +      +
    509B  TYR*     3.9    33.4    -      -       +      +
    510B  GLU      4.5     0.2    -      -       -      +
    513B  VAL*     4.2     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 448 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444B  THR*     3.3    32.8    +      -       -      +
    445B  ASP*     3.2    22.1    +      -       -      +
    447B  LEU*     1.3    77.3    -      -       -      +
    449B  ARG*     1.3    58.0    +      -       +      +
    451B  GLU*     3.4    27.1    -      -       -      +
    452B  VAL*     3.5    14.3    +      -       -      +
    465B  VAL*     6.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 449 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442B  GLY      5.4     1.8    +      -       -      -
    445B  ASP*     3.2    19.1    +      -       -      +
    446B  TYR*     3.2    36.5    +      -       -      +
    447B  LEU      3.1     0.2    -      -       -      -
    448B  GLU*     1.3    77.2    -      -       +      +
    450B  LEU*     1.3    58.3    +      -       -      +
    451B  GLU      3.2     1.8    -      -       -      -
    452B  VAL*     3.5    10.4    +      -       +      +
    453B  ARG*     3.0    40.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 450 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446B  TYR*     2.8    22.1    +      -       +      +
    447B  LEU*     3.3    22.9    +      -       +      +
    449B  ARG*     1.3    76.4    -      -       -      +
    451B  GLU*     1.3    59.9    +      -       -      +
    453B  ARG*     3.7    17.1    -      -       -      +
    454B  GLU*     3.0    51.3    +      -       +      +
    465B  VAL*     4.1    10.8    -      -       +      -
    475B  ILE*     4.2     8.7    -      -       +      -
    503B  ILE*     4.8     2.7    -      -       +      -
    505B  GLU*     3.6    41.7    -      -       +      +
    506B  LEU*     3.6    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 451 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447B  LEU      3.2     4.4    +      -       -      +
    448B  GLU*     3.4    19.9    -      -       -      +
    450B  LEU*     1.3    80.9    -      -       -      +
    452B  VAL*     1.3    57.7    +      -       -      +
    455B  ARG*     3.1    54.4    +      -       -      +
    463B  LEU*     3.9     9.9    -      -       +      +
    464B  LYS*     3.5    39.5    -      -       -      +
    465B  VAL*     3.5    32.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 452 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    448B  GLU      3.5    15.0    +      -       -      +
    449B  ARG*     3.5    12.0    +      -       +      +
    451B  GLU*     1.3    76.8    -      -       +      +
    453B  ARG*     1.3    58.5    +      -       -      +
    455B  ARG*     4.0    25.5    -      -       -      +
    456B  GLU*     3.2    30.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 453 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446B  TYR*     3.5    28.9    +      -       -      -
    449B  ARG*     3.0    32.7    +      -       -      +
    450B  LEU*     3.7    19.7    -      -       -      +
    452B  VAL*     1.3    76.3    -      -       -      +
    454B  GLU*     1.3    74.3    +      -       -      +
    455B  ARG      3.2     0.9    -      -       -      -
    456B  GLU*     3.3     3.9    +      -       -      +
    457B  ARG*     3.0    34.3    +      -       +      +
    505B  GLU*     2.9    29.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 454 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450B  LEU*     3.0    36.9    +      -       +      +
    453B  ARG*     1.3    89.9    +      -       -      +
    455B  ARG*     1.3    52.6    +      -       -      +
    457B  ARG*     2.9    30.6    +      -       -      -
    458B  THR*     2.7    42.5    +      -       -      +
    463B  LEU*     4.1    16.2    -      -       +      -
    475B  ILE*     4.9     4.0    -      -       +      -
    488B  ASN*     5.5     0.3    +      -       -      -
    489B  TYR*     2.4    39.3    +      -       -      +
    503B  ILE*     4.4    11.3    -      -       +      +
    505B  GLU*     5.1     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 455 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451B  GLU*     3.1    39.9    +      -       -      +
    452B  VAL*     4.1    25.1    -      -       -      +
    454B  GLU*     1.3    78.3    -      -       -      +
    456B  GLU*     1.3    57.3    +      -       -      +
    458B  THR*     3.8     6.5    -      -       -      -
    459B  GLY*     3.3    21.8    +      -       -      -
    460B  LEU      3.3    23.6    -      -       -      +
    461B  ASP*     4.2    19.4    +      -       -      +
    462B  THR      5.5     0.2    -      -       -      -
    463B  LEU*     3.3    27.7    +      -       +      -
    464B  LYS*     5.2     1.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 456 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452B  VAL*     3.2    25.4    +      -       +      +
    453B  ARG*     3.3     3.8    +      -       -      +
    455B  ARG*     1.3    77.2    -      -       -      +
    457B  ARG*     1.3    60.8    +      -       -      +
    458B  THR      3.5     0.4    -      -       -      -
    459B  GLY*     4.4     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 457 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453B  ARG*     3.0    22.6    +      -       +      +
    454B  GLU*     2.9    38.1    +      -       -      +
    456B  GLU*     1.3    79.3    -      -       -      +
    458B  THR*     1.3    68.2    +      -       -      +
    486B  PRO*     4.0    28.1    -      -       -      +
    488B  ASN*     4.4     7.5    +      -       -      +
    489B  TYR*     4.3     2.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 458 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454B  GLU      2.7    23.8    +      -       -      +
    455B  ARG*     3.8     2.6    -      -       -      -
    457B  ARG*     1.3    92.9    -      -       -      +
    459B  GLY*     1.3    62.1    +      -       -      +
    460B  LEU*     3.5    36.8    +      -       +      +
    463B  LEU*     3.9     4.2    -      -       +      +
    484B  LEU      5.2     2.2    -      -       -      +
    486B  PRO*     3.9    32.5    -      -       +      -
    489B  TYR*     4.6     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 459 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    455B  ARG      3.3    12.7    +      -       -      -
    456B  GLU      4.4     4.4    +      -       -      -
    457B  ARG      3.8     0.6    -      -       -      -
    458B  THR*     1.3    79.0    +      -       -      +
    460B  LEU*     1.3    65.0    +      -       -      +
    461B  ASP      3.9     2.6    +      -       -      -
    481B  GLN*     5.1     1.9    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il