Contacts of the helix formed by residues 428 - 457 (chain A) in PDB entry 3DCU


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 GLN 428 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426A  ASN*     3.2    13.5    +      -       -      +
    427A  PRO*     1.3    86.6    -      -       +      +
    429A  HIS*     1.3    63.8    +      -       -      +
    430A  PHE      3.4     1.1    -      -       -      -
    431A  ALA*     3.3    16.9    +      -       +      +
    432A  CYS*     3.0    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 429 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  LEU*     4.0    32.5    -      -       +      +
    376A  LYS      5.4     0.4    -      -       -      -
    381A  GLU*     2.9    32.5    +      -       -      -
    419A  CYS*     3.6    23.6    -      -       +      -
    423A  GLN*     3.7    36.5    +      -       +      +
    426A  ASN*     3.1    32.8    +      -       -      +
    427A  PRO      3.2     1.8    -      -       -      +
    428A  GLN*     1.3    74.9    -      -       -      +
    430A  PHE*     1.3    57.8    +      -       -      +
    432A  CYS*     2.8     9.9    +      -       -      +
    433A  LEU*     2.8    46.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 430 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    412A  LEU*     3.4    25.8    -      -       +      -
    415A  LEU*     3.5    20.4    -      -       +      -
    416A  GLN*     3.4    56.3    -      -       +      -
    419A  CYS*     3.6    27.8    -      -       +      +
    427A  PRO      4.2     7.0    +      -       -      +
    428A  GLN      3.4     0.2    -      -       -      -
    429A  HIS*     1.3    77.2    -      -       -      +
    431A  ALA*     1.3    60.3    +      -       -      +
    433A  LEU*     3.0     7.3    +      -       -      +
    434A  LEU*     3.0    58.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 431 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427A  PRO      5.1     0.4    +      -       -      -
    428A  GLN*     3.3    22.2    +      -       -      +
    429A  HIS      3.3     0.8    -      -       -      -
    430A  PHE*     1.3    80.7    -      -       +      +
    432A  CYS*     1.3    57.0    +      -       -      +
    434A  LEU*     3.5    13.8    +      -       +      +
    435A  GLY*     3.1    22.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 432 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  LEU*     4.5    19.7    -      -       +      -
    426A  ASN*     6.0     1.3    -      -       -      -
    428A  GLN*     3.0    17.8    +      -       -      +
    429A  HIS*     2.8    16.3    +      -       -      +
    431A  ALA*     1.3    74.2    -      -       -      +
    433A  LEU*     1.3    66.7    +      -       -      +
    435A  GLY*     3.2    10.5    +      -       -      +
    436A  ARG*     3.0    26.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 433 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  LEU*     3.5    26.7    -      -       +      -
    377A  MET*     4.1    20.4    -      -       +      -
    381A  GLU*     3.8    21.5    -      -       +      +
    385A  LEU*     3.9    17.1    -      -       +      +
    415A  LEU*     3.6    40.8    -      -       +      -
    419A  CYS*     3.9    12.3    -      -       -      -
    429A  HIS*     2.8    30.3    +      -       +      +
    430A  PHE*     3.2     7.2    -      -       -      +
    432A  CYS*     1.3    77.9    -      -       -      +
    434A  LEU*     1.3    63.5    +      -       -      +
    435A  GLY      3.1     1.0    +      -       -      -
    436A  ARG*     3.1    22.4    +      -       -      +
    437A  LEU      4.0     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 434 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385A  LEU*     5.0     1.8    -      -       +      -
    412A  LEU*     4.1    24.9    -      -       +      -
    415A  LEU*     4.4     8.3    -      -       +      -
    430A  PHE*     3.0    48.6    +      -       +      +
    431A  ALA*     3.7    11.7    -      -       +      +
    432A  CYS      3.3     0.2    -      -       -      -
    433A  LEU*     1.3    76.7    -      -       -      +
    435A  GLY*     1.3    64.1    +      -       -      +
    437A  LEU*     3.0    38.6    +      -       +      +
    438A  THR*     3.7     5.2    +      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    431A  ALA      3.1    14.0    +      -       -      -
    432A  CYS*     3.2     6.2    +      -       -      -
    433A  LEU      3.1     1.8    -      -       -      -
    434A  LEU*     1.3    78.1    -      -       -      +
    436A  ARG*     1.3    64.8    +      -       -      +
    438A  THR*     2.9    21.0    +      -       -      -
    439A  GLU*     3.1    15.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 436 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330A  LEU*     5.7     0.2    -      -       +      -
    368A  PHE*     4.2     8.5    -      -       +      -
    371A  SER*     3.1    42.8    +      -       -      -
    372A  ILE*     3.4    28.4    -      -       +      +
    375A  LEU*     3.4    23.0    -      -       +      +
    377A  MET*     4.6     6.7    -      -       +      -
    385A  LEU*     4.3    11.4    -      -       +      -
    432A  CYS*     3.0    28.5    +      -       -      +
    433A  LEU      3.1    13.2    +      -       -      +
    435A  GLY*     1.3    75.7    -      -       -      +
    437A  LEU*     1.3    55.7    +      -       -      +
    439A  GLU*     2.6    39.7    +      -       -      +
    440A  LEU*     2.6    43.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 437 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  GLU*     4.6     5.0    -      -       -      +
    385A  LEU*     4.1    18.8    -      -       +      +
    388A  ILE*     3.8    24.0    -      -       +      -
    389A  VAL*     3.6    36.6    -      -       +      -
    392A  SER*     4.5     8.5    -      -       -      +
    408A  GLN*     5.6     1.1    -      -       -      +
    412A  LEU*     5.2     2.0    -      -       +      -
    433A  LEU      4.0     0.4    +      -       -      -
    434A  LEU*     3.0    32.8    +      -       +      +
    436A  ARG*     1.3    79.4    -      -       -      +
    438A  THR*     1.3    59.7    +      -       -      +
    440A  LEU*     3.6     8.9    -      -       +      +
    441A  ARG*     3.1    31.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 438 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    434A  LEU      4.2     5.0    +      -       -      -
    435A  GLY*     2.9    13.4    +      -       -      -
    437A  LEU*     1.3    76.3    -      -       -      +
    439A  GLU*     1.3    67.2    +      -       -      +
    441A  ARG*     2.9    27.2    +      -       +      +
    442A  THR*     3.2    10.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 439 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    368A  PHE*     3.2    25.2    -      -       +      -
    371A  SER*     4.0    10.6    +      -       -      -
    435A  GLY      3.1    18.4    +      -       -      +
    436A  ARG*     2.6    45.6    +      -       -      +
    438A  THR*     1.3    75.5    -      -       -      +
    440A  LEU*     1.3    62.9    +      -       -      +
    442A  THR*     3.2    19.8    -      -       -      -
    443A  PHE*     3.1    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 440 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  GLU*     3.6    26.5    -      -       +      +
    329A  PHE*     3.6    29.8    -      -       +      -
    330A  LEU*     4.0    22.2    -      -       +      -
    368A  PHE*     3.4    28.5    -      -       +      -
    385A  LEU*     6.0     1.6    -      -       +      -
    389A  VAL*     3.8    28.0    -      -       +      -
    436A  ARG*     2.6    28.7    +      -       +      +
    437A  LEU*     3.6     6.5    -      -       -      +
    439A  GLU*     1.3    69.4    -      -       -      +
    441A  ARG*     1.3    67.8    +      -       -      +
    443A  PHE*     2.8    23.6    +      -       +      +
    444A  ASN*     3.6     4.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 441 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326A  GLU*     3.9    12.8    +      -       -      +
    392A  SER*     3.5    23.6    +      -       -      -
    394A  ASP*     2.7    55.3    +      -       -      -
    395A  ARG*     3.6    20.7    -      -       -      +
    437A  LEU*     3.1    19.6    +      -       -      +
    438A  THR*     2.9    14.7    +      -       +      +
    440A  LEU*     1.3    76.5    -      -       -      +
    442A  THR*     1.3    67.0    +      -       -      +
    444A  ASN*     2.8    30.4    +      -       -      +
    445A  HIS*     4.1     1.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 442 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438A  THR*     3.2    10.7    +      -       -      +
    439A  GLU*     3.2    16.8    +      -       -      -
    440A  LEU      3.1     0.2    -      -       -      -
    441A  ARG*     1.3    78.5    -      -       -      +
    443A  PHE*     1.3    71.5    +      -       +      +
    444A  ASN      3.2     1.2    +      -       -      -
    445A  HIS*     3.3    20.4    +      -       -      +
    446A  HIS*     3.8     3.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 443 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325A  VAL*     5.1     2.9    -      -       +      -
    329A  PHE*     3.4    41.2    -      +       +      -
    361A  TYR      5.1     1.3    -      -       -      -
    364A  PRO*     3.4    46.0    -      -       +      -
    365A  MET*     3.8     8.3    -      -       +      -
    368A  PHE*     3.5    34.5    -      +       +      -
    439A  GLU*     3.1    26.7    -      -       +      -
    440A  LEU*     2.8    23.2    +      -       +      +
    442A  THR*     1.3    76.2    -      -       +      +
    444A  ASN*     1.3    57.3    +      -       -      -
    445A  HIS      3.2     0.2    -      -       -      -
    446A  HIS*     3.2    13.7    +      -       +      +
    447A  HIS*     2.8    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 444 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322A  GLY      4.0    11.6    -      -       -      +
    325A  VAL*     4.0    20.8    -      -       -      +
    326A  GLU*     2.5    40.0    +      -       -      +
    395A  ARG*     4.8     0.4    -      -       -      +
    440A  LEU      3.6     0.2    +      -       -      -
    441A  ARG*     2.8    31.3    +      -       -      +
    443A  PHE*     1.3    73.2    -      -       -      +
    445A  HIS*     1.3    66.5    +      -       -      +
    447A  HIS*     3.2     6.1    +      -       -      +
    448A  ALA*     3.0    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 445 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441A  ARG      4.1     1.2    +      -       -      +
    442A  THR*     3.3    12.4    +      -       -      +
    443A  PHE      3.2     0.6    -      -       -      -
    444A  ASN*     1.3    80.5    -      -       -      +
    446A  HIS*     1.3    63.4    +      -       -      +
    448A  ALA*     3.3    12.2    +      -       -      +
    449A  GLU*     3.3    17.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 446 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361A  TYR*     3.9    40.1    -      -       +      -
    442A  THR*     3.8     2.9    +      -       +      +
    443A  PHE*     3.2    24.1    +      -       +      +
    445A  HIS*     1.3    79.6    -      -       -      +
    447A  HIS*     1.3    62.3    +      -       -      +
    449A  GLU*     3.0    22.7    +      -       -      +
    450A  MET*     3.1     6.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 447 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  O62      3.5    33.2    +      +       +      +
    325A  VAL*     3.8    27.3    -      -       +      +
    329A  PHE*     5.6     3.6    -      +       +      -
    443A  PHE      2.8    20.8    +      -       -      +
    444A  ASN*     3.2     6.0    +      -       -      +
    446A  HIS*     1.3    73.9    -      -       -      +
    448A  ALA*     1.3    64.6    +      -       -      +
    450A  MET*     3.1     8.2    +      -       +      +
    451A  LEU*     3.0    52.9    +      -       +      +
    454A  TRP*     5.5     1.8    -      +       -      -
    469A  TRP*     3.5    40.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with ALA 448 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444A  ASN      3.0    11.9    +      -       -      +
    445A  HIS*     3.6    11.0    -      -       -      +
    447A  HIS*     1.3    80.1    +      -       -      +
    449A  GLU*     1.3    66.7    +      -       +      +
    451A  LEU*     3.5     9.1    +      -       -      +
    452A  MET*     3.3    26.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 449 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361A  TYR*     3.2    29.0    +      -       +      +
    445A  HIS      3.3    15.3    +      -       -      +
    446A  HIS*     3.0    10.3    +      -       -      +
    448A  ALA*     1.3    80.7    -      -       -      +
    450A  MET*     1.3    64.9    +      -       -      +
    452A  MET*     2.9    11.7    +      -       -      +
    453A  SER*     2.9    21.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 450 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    356A  GLY      3.7    13.0    -      -       -      +
    357A  ILE*     3.6    12.6    -      -       +      -
    358A  SER*     2.7    52.3    -      -       -      +
    361A  TYR*     3.5    15.9    -      -       +      -
    446A  HIS      3.1     6.1    +      -       -      +
    447A  HIS*     3.1    12.8    +      -       +      +
    449A  GLU*     1.3    80.1    -      -       -      +
    451A  LEU*     1.3    58.2    +      -       -      +
    453A  SER*     3.5    21.1    -      -       -      +
    454A  TRP*     2.9    66.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 451 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447A  HIS*     3.0    48.0    +      -       +      +
    448A  ALA*     3.6    12.1    -      -       -      +
    449A  GLU      3.1     0.2    -      -       -      -
    450A  MET*     1.3    76.2    -      -       -      +
    452A  MET*     1.3    67.3    +      -       +      +
    454A  TRP*     3.8    16.0    -      -       +      +
    455A  ARG*     2.9    35.0    +      -       -      +
    461A  PHE*     3.8    24.4    -      -       +      -
    469A  TRP*     3.7    37.2    -      -       +      +
    471A  VAL*     4.0    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 452 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    448A  ALA      3.3    12.5    +      -       -      +
    449A  GLU*     2.9    12.4    +      -       -      +
    451A  LEU*     1.3    86.7    -      -       +      +
    453A  SER*     1.3    66.4    +      -       -      +
    455A  ARG*     3.3    11.3    +      -       +      +
    456A  VAL*     3.0    33.6    +      -       +      +
    470A  ASP      5.5     2.9    -      -       -      +
    471A  VAL*     4.7    16.2    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    356A  GLY      4.5     4.7    +      -       -      -
    449A  GLU      2.9    10.9    +      -       -      -
    450A  MET*     3.4    31.6    -      -       -      +
    452A  MET*     1.3    75.8    -      -       -      +
    454A  TRP*     1.3    63.6    +      -       -      +
    456A  VAL*     2.6    29.2    -      -       -      +
    457A  ASN*     2.9    15.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 454 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      1A  O62      3.4    39.0    -      -       +      -
    284A  PHE*     3.3    22.2    -      +       -      -
    355A  SER*     3.0    22.4    +      -       -      -
    356A  GLY*     3.7    15.9    +      -       -      -
    357A  ILE*     3.6    30.3    -      -       +      -
    447A  HIS*     5.2     1.1    -      +       -      -
    450A  MET*     2.9    52.7    +      -       +      +
    451A  LEU*     3.8    11.0    -      -       +      -
    453A  SER*     1.3    75.2    +      -       -      +
    455A  ARG*     1.3    57.8    +      -       -      +
    457A  ASN*     2.9    18.1    +      -       -      +
    459A  HIS*     3.0    53.7    +      +       +      +
    461A  PHE*     3.8    23.1    -      +       +      -
----------------------------------------------------------
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Residues in contact with ARG 455 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451A  LEU      2.9    22.9    +      -       -      +
    452A  MET*     3.4    20.2    -      -       +      +
    454A  TRP*     1.3    76.0    -      -       -      +
    456A  VAL*     1.3    60.1    +      -       +      +
    458A  ASP*     2.9    21.1    +      -       -      -
    459A  HIS      3.7    19.7    +      -       -      +
    461A  PHE*     3.8    32.6    -      -       +      +
    466A  CYS*     4.5    11.0    -      -       -      -
    471A  VAL*     4.4    10.6    +      -       +      +
    472A  GLN*     2.5    35.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 456 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452A  MET*     3.0    19.5    +      -       +      +
    453A  SER*     2.6    32.1    -      -       -      +
    455A  ARG*     1.3    75.7    -      -       +      +
    457A  ASN*     1.3    66.0    +      -       -      +
    458A  ASP*     3.1     3.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 457 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453A  SER*     2.9    27.2    +      -       -      +
    454A  TRP*     2.9    10.5    +      -       -      +
    456A  VAL*     1.3    88.0    -      -       -      +
    458A  ASP*     1.3    69.7    +      -       -      +
    459A  HIS*     2.9    24.5    +      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


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

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

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