Contacts of the helix formed by residues 434 - 461 (chain A) in PDB entry 6QX2


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with THR 434 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431A  ARG*     3.4    20.2    +      -       -      +
    432A  ARG      3.4     0.6    -      -       -      +
    433A  LEU*     1.3    82.9    -      -       -      +
    435A  GLY*     1.3    65.2    +      -       -      +
    436A  LEU*     5.1     0.9    -      -       -      +
    437A  GLU*     3.5    26.9    +      -       -      +
    438A  ARG*     3.7     7.8    +      -       -      +
    398C  ILE*     3.5    27.6    -      -       +      +
    399C  ARG      4.7     0.7    -      -       -      -
    401C  SER      3.5    13.9    -      -       -      +
    402C  ASP      3.8    10.0    +      -       -      -
    403C  THR*     4.2    11.2    -      -       -      +
    404C  ASP*     4.0    14.3    +      -       -      +
    407C  ALA*     4.7     5.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 435 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434A  THR*     1.3    71.3    -      -       -      +
    436A  LEU*     1.3    66.0    +      -       -      +
    437A  GLU      3.3     0.7    +      -       -      -
    438A  ARG*     3.5    14.4    +      -       -      +
    439A  ASP*     3.9    13.7    +      -       -      +
    399C  ARG      4.5     5.7    +      -       -      -
    401C  SER      3.6     9.2    +      -       -      -
    402C  ASP*     3.8     5.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 436 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434A  THR*     3.5     1.3    -      -       -      +
    435A  GLY*     1.3    76.1    -      -       -      +
    437A  GLU*     1.3    56.3    +      -       +      +
    439A  ASP*     3.3    16.1    +      -       +      +
    440A  LYS*     3.1    30.8    +      -       +      +
    402C  ASP*     3.5    17.1    +      -       +      +
    403C  THR*     3.6    31.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 437 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431A  ARG*     3.7    22.0    -      -       +      +
    432A  ARG*     3.5    44.8    +      -       -      +
    434A  THR*     3.7    14.2    +      -       -      +
    435A  GLY      3.2     0.6    -      -       -      -
    436A  LEU*     1.3    76.2    -      -       +      +
    438A  ARG*     1.3    64.6    +      -       -      +
    440A  LYS*     3.0    35.8    +      -       -      +
    441A  ILE*     3.2    28.7    +      -       -      +
    404C  ASP*     5.2     5.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 438 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385A  ARG*     5.2    12.4    -      -       -      +
    388A  LEU*     4.1    33.8    -      -       +      +
    389A  ASP*     3.7    24.0    +      -       -      -
    434A  THR      3.7     6.9    +      -       -      +
    435A  GLY*     3.5    11.0    +      -       -      +
    436A  LEU      3.4     0.8    -      -       -      -
    437A  GLU*     1.3    76.6    -      -       -      +
    439A  ASP*     1.3    71.7    +      -       -      +
    441A  ILE*     3.5     3.5    +      -       -      +
    442A  GLU*     3.2    58.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 439 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435A  GLY      3.9    11.8    +      -       -      +
    436A  LEU*     3.3    19.3    +      -       +      +
    437A  GLU      3.3     0.4    -      -       -      -
    438A  ARG*     1.3    86.9    +      -       -      +
    440A  LYS*     1.3    56.2    +      -       -      +
    442A  GLU*     3.2     4.1    +      -       -      +
    443A  ALA*     2.9    35.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 440 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436A  LEU*     3.1    19.6    +      -       +      +
    437A  GLU*     3.0    38.2    +      -       -      +
    439A  ASP*     1.3    75.9    -      -       -      +
    441A  ILE*     1.3    60.8    +      -       +      +
    443A  ALA*     3.6     8.6    -      -       +      +
    444A  GLU*     3.2    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 441 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381A  LEU*     4.0    23.3    -      -       +      +
    384A  LEU*     4.2    12.6    -      -       +      -
    385A  ARG*     3.9    26.2    -      -       +      +
    388A  LEU*     3.5    28.7    -      -       +      -
    428A  MET*     5.4     1.3    -      -       -      -
    432A  ARG*     3.9    36.6    -      -       +      +
    437A  GLU*     3.2    22.0    +      -       -      +
    438A  ARG*     3.7     6.7    -      -       -      +
    439A  ASP      3.2     0.4    -      -       -      -
    440A  LYS*     1.3    74.4    -      -       -      +
    442A  GLU*     1.3    59.6    +      -       -      +
    444A  GLU*     3.5     8.9    +      -       -      +
    445A  TYR*     3.1    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 442 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385A  ARG*     3.3    35.5    +      -       -      +
    438A  ARG*     3.2    43.4    +      -       -      +
    439A  ASP*     3.2     4.7    +      -       -      +
    441A  ILE*     1.3    78.2    -      -       +      +
    443A  ALA*     1.3    62.5    +      -       -      +
    445A  TYR*     3.3     5.2    +      -       +      +
    446A  ASN*     2.8    48.9    +      -       -      +
    468d  ARG*     3.7    18.6    -      -       -      +
    469d  LEU      5.1     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 443 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439A  ASP      2.9    17.0    +      -       -      +
    440A  LYS*     3.6    10.1    -      -       -      +
    442A  GLU*     1.3    76.9    -      -       -      +
    444A  GLU*     1.3    62.5    +      -       -      +
    446A  ASN*     3.3     5.7    +      -       -      +
    447A  GLU*     3.2    23.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 444 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377A  ARG*     2.9    47.1    +      -       -      +
    381A  LEU*     3.7    12.0    -      -       +      +
    440A  LYS      3.2    11.6    +      -       -      +
    441A  ILE*     3.8    10.2    -      -       -      +
    443A  ALA*     1.3    78.8    -      -       -      +
    445A  TYR*     1.3    56.8    +      -       -      +
    447A  GLU*     3.6     5.7    +      -       -      +
    448A  LEU*     3.1    33.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 445 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  ALA*     3.6    29.8    -      -       +      -
    381A  LEU*     3.6    27.6    -      -       +      -
    382A  GLU*     2.8    33.6    +      -       +      +
    385A  ARG*     3.8    38.7    +      -       -      -
    441A  ILE      3.1    17.6    +      -       -      +
    442A  GLU*     3.6     9.0    -      -       +      +
    443A  ALA      3.2     0.4    -      -       -      -
    444A  GLU*     1.3    78.1    -      -       -      +
    446A  ASN*     1.3    67.5    +      -       -      +
    448A  LEU*     3.4     4.1    -      -       +      +
    449A  LEU*     3.2    54.5    +      -       +      +
    470d  ASP*     4.9     5.4    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 446 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442A  GLU*     2.8    43.1    +      -       -      +
    443A  ALA*     3.3     5.8    +      -       -      +
    445A  TYR*     1.3    77.9    -      -       -      +
    447A  GLU*     1.3    63.0    +      -       -      +
    449A  LEU*     3.2    16.8    +      -       -      +
    450A  ASN*     3.3    20.5    +      -       -      +
    468d  ARG*     4.9     1.7    -      -       -      +
    469d  LEU*     3.4    42.8    +      -       +      +
    470d  ASP*     3.0    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 447 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443A  ALA      3.2    15.7    +      -       -      +
    444A  GLU*     3.9     7.2    -      -       -      +
    446A  ASN*     1.3    75.8    -      -       -      +
    448A  LEU*     1.3    56.6    +      -       -      +
    450A  ASN*     3.3    13.9    +      -       -      +
    451A  TYR*     3.0    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 448 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  ALA*     3.5    37.7    -      -       +      +
    377A  ARG*     3.4    31.2    -      -       +      -
    378A  ALA*     3.7    20.0    -      -       +      +
    381A  LEU*     3.8    18.2    -      -       +      -
    444A  GLU*     3.1    21.1    +      -       +      +
    445A  TYR*     3.4     6.7    -      -       -      +
    446A  ASN      3.2     0.2    -      -       -      -
    447A  GLU*     1.3    76.8    -      -       -      +
    449A  LEU*     1.3    56.7    +      -       -      +
    451A  TYR*     3.3    13.5    +      -       +      +
    452A  ILE*     2.8    37.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 449 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  ALA*     5.1     2.5    -      -       +      -
    382A  GLU*     5.3     1.1    -      -       -      +
    445A  TYR*     3.2    50.2    +      -       +      +
    446A  ASN*     3.2    10.8    +      -       -      +
    448A  LEU*     1.3    74.7    -      -       +      +
    450A  ASN*     1.3    65.7    +      -       -      +
    452A  ILE*     3.4    20.2    +      -       +      +
    453A  SER*     3.2    22.3    +      -       -      -
    470d  ASP*     2.8    54.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 450 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446A  ASN      3.3    14.4    +      -       -      +
    447A  GLU*     3.3    12.6    +      -       -      +
    449A  LEU*     1.3    76.6    -      -       -      +
    451A  TYR*     1.3    56.8    +      -       -      +
    453A  SER*     3.2     9.0    +      -       -      -
    454A  GLU*     3.0    41.9    +      -       -      +
    469d  LEU*     6.1     2.0    -      -       -      +
    470d  ASP*     5.6     2.3    -      -       -      +
    473d  LEU*     4.4    21.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 451 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  ASN*     3.2    39.3    +      -       +      +
    374A  ALA*     4.2    14.1    -      -       +      -
    447A  GLU      3.0    14.0    +      -       -      +
    448A  LEU*     3.3    15.5    +      -       +      +
    450A  ASN*     1.3    72.8    -      -       -      +
    452A  ILE*     1.3    64.3    -      -       -      +
    454A  GLU*     3.2    21.3    +      -       +      +
    455A  LEU*     2.9    62.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 452 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  LEU*     3.7    15.9    -      -       +      +
    374A  ALA*     3.8    29.4    -      -       +      +
    375A  LYS*     4.2    16.6    -      -       +      +
    378A  ALA*     4.0    26.9    -      -       +      -
    448A  LEU      2.8    29.3    +      -       -      +
    449A  LEU*     3.8    16.4    -      -       +      +
    450A  ASN      3.3     0.2    -      -       -      -
    451A  TYR*     1.3    70.3    -      -       -      +
    453A  SER*     1.3    57.5    +      -       -      +
    455A  LEU*     3.4     6.3    +      -       -      +
    456A  GLU*     3.1    49.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 453 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449A  LEU      3.2    13.1    +      -       -      -
    450A  ASN*     3.2    12.3    +      -       -      -
    452A  ILE*     1.3    73.7    -      -       -      +
    454A  GLU*     1.3    58.0    +      -       -      +
    456A  GLU*     3.3    13.0    +      -       -      +
    457A  THR*     2.8    34.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 454 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450A  ASN*     3.0    31.5    +      -       -      +
    451A  TYR*     3.2    24.1    +      -       +      +
    453A  SER*     1.3    74.8    -      -       -      +
    455A  LEU*     1.3    63.3    +      -       +      +
    457A  THR*     3.5    11.1    +      -       -      -
    458A  ILE*     3.4    27.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 455 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    367A  THR*     3.6    30.1    -      -       +      +
    370A  ASN*     3.7     9.6    -      -       +      +
    371A  LEU*     3.5    41.3    -      -       +      +
    374A  ALA*     4.7     0.9    -      -       +      -
    451A  TYR*     2.9    66.2    +      -       +      +
    452A  ILE*     3.6     8.1    -      -       -      +
    454A  GLU*     1.3    76.1    -      -       +      +
    456A  GLU*     1.3    61.8    +      -       -      +
    458A  ILE*     3.2    16.1    +      -       +      +
    459A  LEU*     3.2    21.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 456 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  LEU*     4.0    15.5    -      -       +      -
    375A  LYS*     3.6    22.3    +      -       -      -
    452A  ILE*     3.1    34.4    +      -       -      +
    453A  SER*     3.3    14.3    +      -       -      +
    455A  LEU*     1.3    73.1    -      -       -      +
    457A  THR*     1.3    56.2    +      -       -      +
    459A  LEU*     3.3     8.6    +      -       +      +
    460A  ALA*     2.9    35.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 457 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453A  SER*     2.8    20.4    +      -       -      -
    454A  GLU*     3.5    12.0    +      -       -      -
    456A  GLU*     1.3    76.8    -      -       -      +
    458A  ILE*     1.3    60.3    +      -       +      +
    460A  ALA*     3.5     6.3    +      -       -      +
    461A  ASP*     3.2    19.6    +      -       +      +
    464A  VAL*     3.7    24.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 458 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363A  VAL*     5.5     1.6    -      -       +      -
    367A  THR*     4.0    25.1    -      -       +      +
    454A  GLU*     3.4    18.6    +      -       +      +
    455A  LEU*     3.2    21.6    +      -       +      +
    457A  THR*     1.3    77.7    -      -       -      +
    459A  LEU*     1.3    60.4    +      -       +      +
    461A  ASP      3.3    14.6    +      -       -      +
    464A  VAL*     4.7    12.3    -      -       +      -
    465A  LEU*     2.8    56.2    -      -       +      +
    468A  LEU*     4.4    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 459 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364A  ARG*     4.0    21.7    -      -       +      +
    367A  THR*     3.7    20.9    -      -       +      -
    368A  GLN*     3.6    36.8    -      -       +      +
    371A  LEU*     3.6    31.2    -      -       +      -
    455A  LEU      3.2    15.8    +      -       -      +
    456A  GLU*     3.3     6.7    +      -       +      +
    458A  ILE*     1.3    78.1    -      -       +      +
    460A  ALA*     1.3    60.7    +      -       -      +
    461A  ASP      3.8     1.0    +      -       -      -
    462A  GLU*     5.1     3.3    +      -       -      +
    465A  LEU*     4.8     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 460 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    456A  GLU      2.9    18.3    +      -       -      +
    457A  THR*     3.7     7.6    -      -       -      +
    458A  ILE      3.3     0.4    -      -       -      -
    459A  LEU*     1.3    79.1    -      -       -      +
    461A  ASP*     1.3    58.3    +      -       +      +
    462A  GLU      4.1     1.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 461 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    457A  THR*     3.2     5.9    +      -       +      +
    458A  ILE      3.3    12.0    -      -       -      +
    459A  LEU      3.5     0.4    -      -       -      -
    460A  ALA*     1.3    78.2    -      -       +      +
    462A  GLU*     1.3    56.5    +      -       -      +
    463A  GLU*     3.2    19.4    +      -       -      +
    464A  VAL*     2.9    54.6    +      -       +      +
    465A  LEU      3.6     1.6    +      -       -      -
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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