Contacts of the helix formed by residues 429 - 452 (chain A) in PDB entry 2CT8


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 LYS 429 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    424A  LEU*     3.0    36.1    +      -       +      +
    425A  ASN*     5.9     0.2    -      -       -      -
    427A  GLU*     3.7    28.5    +      -       -      +
    428A  ARG*     1.3   101.0    -      -       -      +
    430A  LYS*     1.3    54.6    +      -       -      +
    431A  GLU      2.9     7.4    +      -       -      +
    432A  GLU*     4.1    28.1    +      -       +      +
    433A  LEU*     2.9    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 430 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  LEU*     5.3     2.9    -      -       +      +
    428A  ARG*     2.7    36.1    +      -       +      +
    429A  LYS*     1.3    70.5    -      -       -      +
    431A  GLU*     1.3    61.2    +      -       +      +
    433A  LEU*     4.2    12.4    -      -       +      +
    434A  GLN*     2.9    32.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 431 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  ALA      5.7     0.9    +      -       -      -
    429A  LYS*     3.0     1.4    -      -       -      -
    430A  LYS*     1.3    80.7    -      -       +      +
    432A  GLU*     1.3    65.8    +      -       -      +
    433A  LEU      3.1     1.6    -      -       -      -
    434A  GLN*     3.2    15.1    +      -       -      +
    435A  LYS*     3.2    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 432 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    419A  LYS*     6.1     0.5    -      -       -      +
    424A  LEU*     3.7    28.5    -      -       +      +
    429A  LYS*     3.3    29.4    +      -       +      +
    431A  GLU*     1.3    76.8    -      -       -      +
    433A  LEU*     1.3    68.4    +      -       -      +
    435A  LYS*     3.4    16.5    +      -       +      +
    436A  VAL*     3.2    25.2    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    365A  PHE*     4.2     8.3    -      -       +      +
    366A  LEU*     3.5    31.4    -      -       +      -
    421A  PRO*     3.7    38.6    -      -       +      +
    424A  LEU*     4.0    14.1    -      -       +      +
    425A  ASN*     3.9    31.4    -      -       +      +
    429A  LYS      2.9    19.8    +      -       -      +
    430A  LYS*     4.3    10.8    -      -       +      +
    432A  GLU*     1.3    77.2    -      -       -      +
    434A  GLN*     1.3    57.9    +      -       -      +
    436A  VAL*     2.8    21.8    +      -       -      +
    437A  LEU*     3.0    21.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 434 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  LEU*     3.6    34.8    -      -       +      +
    371A  SER*     3.1    27.9    +      -       -      +
    372A  GLY*     4.3     7.0    -      -       -      -
    430A  LYS*     2.9    22.4    +      -       -      +
    431A  GLU*     3.2    15.5    +      -       -      +
    433A  LEU*     1.3    76.9    -      -       -      +
    435A  LYS*     1.3    66.0    +      -       -      +
    436A  VAL      2.9     1.2    +      -       -      -
    438A  TYR*     2.9    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 435 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  ALA*     3.9    42.6    -      -       +      +
    374A  ARG      3.5    23.8    -      -       -      +
    375A  ASP*     4.3    20.6    +      -       +      +
    415A  TYR*     4.2     2.3    +      -       -      +
    419A  LYS*     5.4     4.6    -      -       -      +
    431A  GLU      3.2    10.0    +      -       -      +
    432A  GLU*     3.7    20.5    -      -       +      +
    433A  LEU      3.3     0.2    -      -       -      -
    434A  GLN*     1.3    78.6    -      -       -      +
    436A  VAL*     1.3    59.6    +      -       +      +
    439A  ALA*     3.3    24.1    +      -       -      +
    478A  TYR*     4.8     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 436 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    415A  TYR*     3.6    17.1    -      -       +      +
    419A  LYS*     3.5    39.9    -      -       +      +
    421A  PRO*     3.9    30.3    -      -       +      -
    424A  LEU*     4.2    10.1    -      -       +      -
    432A  GLU*     3.2    16.8    +      -       +      +
    433A  LEU      2.8    12.0    +      -       -      +
    435A  LYS*     1.3    83.3    -      -       +      +
    437A  LEU*     1.3    60.5    +      -       +      +
    439A  ALA      4.0     0.2    -      -       -      -
    440A  LEU*     3.2    26.7    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    358A  VAL*     5.3     4.7    -      -       +      +
    361A  MET*     4.3    15.9    -      -       +      +
    362A  ALA*     3.9    30.1    -      -       +      +
    365A  PHE*     4.5     2.7    -      -       +      -
    366A  LEU*     3.5    40.8    -      -       +      -
    370A  VAL*     4.6     6.3    -      -       +      -
    421A  PRO*     4.2    16.8    -      -       +      -
    433A  LEU*     3.0    18.3    +      -       +      +
    436A  VAL*     1.3    83.6    -      -       +      +
    438A  TYR*     1.3    60.9    +      -       -      +
    439A  ALA      3.0     1.3    -      -       -      -
    440A  LEU*     2.7    20.2    +      -       +      +
    441A  VAL*     2.6    38.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 438 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  VAL*     4.0    15.7    -      -       -      +
    371A  SER*     3.9    13.9    -      -       -      +
    372A  GLY      3.4    29.8    -      -       -      -
    373A  ALA      3.6     7.9    -      -       -      +
    374A  ARG*     4.8     6.3    +      -       +      -
    434A  GLN      2.9    17.4    +      -       -      +
    435A  LYS      4.5     2.0    -      -       -      +
    437A  LEU*     1.3    75.3    -      -       -      +
    439A  ALA*     1.3    64.4    +      -       -      +
    441A  VAL*     3.3     6.6    -      -       +      +
    442A  ASP*     3.0    29.3    +      -       -      +
    478A  TYR*     3.2    39.1    +      +       -      +
    480A  LYS      2.7    21.4    +      -       -      -
    481A  ASN*     2.8    22.3    -      -       +      +
    482A  THR*     3.7     9.6    -      -       -      -
    483A  TYR*     3.6    28.7    -      +       -      -
----------------------------------------------------------
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Residues in contact with ALA 439 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  ASP*     4.4     2.5    -      -       +      -
    378A  TYR*     3.6    26.5    -      -       +      -
    412A  LEU*     4.8     0.6    -      -       -      +
    415A  TYR*     3.5    24.7    -      -       +      +
    435A  LYS      3.3    19.6    +      -       -      +
    436A  VAL      3.8     3.6    -      -       -      +
    437A  LEU      3.0     0.4    -      -       -      -
    438A  TYR*     1.3    80.6    -      -       -      +
    440A  LEU*     1.3    58.0    +      -       -      +
    443A  GLY*     3.0    22.7    +      -       -      -
    478A  TYR*     3.6    20.4    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    354A  LEU*     5.8     0.2    -      -       +      -
    358A  VAL*     4.0    27.8    -      -       +      -
    361A  MET*     5.3     2.9    -      -       -      -
    412A  LEU*     4.2    23.8    -      -       +      +
    415A  TYR*     3.2    40.2    -      -       +      -
    416A  VAL*     4.0    19.3    -      -       +      -
    421A  PRO*     4.9     4.5    -      -       +      -
    436A  VAL*     3.2    21.6    +      -       +      +
    437A  LEU*     2.7    30.7    +      -       +      +
    439A  ALA*     1.3    71.8    -      -       -      +
    441A  VAL*     1.3    59.6    -      -       -      +
    443A  GLY*     2.9    17.8    +      -       -      -
    444A  LEU*     3.0    13.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 441 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358A  VAL*     4.1     9.3    -      -       +      +
    362A  ALA*     5.7     2.0    -      -       +      -
    370A  VAL*     3.3    30.7    -      -       +      -
    437A  LEU*     2.6    24.5    +      -       +      +
    438A  TYR*     3.3     7.6    -      -       -      +
    440A  LEU*     1.3    72.8    -      -       -      +
    442A  ASP*     1.3    63.8    +      -       -      +
    444A  LEU*     2.8    30.1    +      -       +      +
    445A  PHE*     2.9    11.1    +      -       -      +
    466A  LEU*     4.2    19.5    -      -       +      +
    483A  TYR*     4.0    27.8    -      -       +      -
    485A  LEU*     4.5    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 442 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  TYR*     2.6    23.0    +      -       -      -
    438A  TYR*     3.0    21.9    +      -       +      +
    439A  ALA      3.9     2.0    -      -       -      +
    441A  VAL*     1.3    78.4    -      -       -      +
    443A  GLY*     1.3    62.8    +      -       -      +
    445A  PHE*     3.0     4.1    +      -       -      +
    446A  VAL*     3.0    22.2    +      -       -      +
    476A  LYS      5.0     0.2    -      -       -      +
    477A  PRO      2.3    31.3    -      -       -      +
    478A  TYR*     3.3    25.2    -      -       +      -
    479A  SER*     3.8     1.7    +      -       -      +
    483A  TYR*     2.7    38.0    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 443 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  TYR*     3.0    19.5    +      -       -      -
    408A  PHE*     3.6     7.9    -      -       -      -
    412A  LEU*     4.1    17.0    -      -       -      -
    439A  ALA      3.0    10.3    +      -       -      -
    440A  LEU      2.9    10.9    +      -       -      -
    442A  ASP*     1.3    76.9    -      -       -      +
    444A  LEU*     1.3    57.4    +      -       -      +
    446A  VAL*     3.2     3.7    +      -       -      +
    447A  LEU*     2.8    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 444 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354A  LEU*     3.8    34.5    -      -       +      -
    355A  TYR*     3.5    40.3    +      -       +      +
    358A  VAL*     3.7    32.3    -      -       +      -
    359A  VAL*     4.4     4.0    -      -       +      -
    412A  LEU*     5.1     1.1    -      -       +      -
    440A  LEU      3.0    13.6    +      -       -      +
    441A  VAL*     2.8    12.9    +      -       +      +
    443A  GLY*     1.3    76.8    -      -       -      +
    445A  PHE*     1.3    57.3    +      -       -      +
    447A  LEU*     4.2     5.2    -      -       +      -
    448A  THR*     2.7    35.1    +      -       -      -
    466A  LEU*     3.7    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 445 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441A  VAL      2.9     7.1    +      -       -      +
    442A  ASP*     3.2    10.5    -      -       -      +
    444A  LEU*     1.3    79.7    -      -       -      +
    446A  VAL*     1.3    67.3    +      -       +      +
    448A  THR*     3.2     6.6    +      -       -      -
    449A  HIS*     2.9    40.1    -      +       -      -
    463A  LEU*     4.0     9.2    -      -       +      -
    466A  LEU*     3.6    19.9    -      -       +      +
    468A  GLU*     3.4    39.0    -      -       +      -
    470A  GLU      4.5     7.0    -      -       -      -
    472A  LEU*     3.4    36.1    -      -       +      -
    476A  LYS      5.5     0.4    -      -       -      -
    479A  SER*     3.5    14.4    -      -       -      -
    480A  LYS*     4.5     8.3    -      -       +      -
    483A  TYR*     3.6    31.0    -      +       +      +
----------------------------------------------------------
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Residues in contact with VAL 446 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  TYR*     4.0    11.7    -      -       -      +
    382A  ALA*     5.2     3.8    -      -       +      +
    385A  SER*     6.5     0.4    -      -       -      -
    386A  ILE*     4.7    16.2    -      -       +      +
    408A  PHE*     3.9    19.3    -      -       +      -
    442A  ASP*     3.0    19.7    +      -       -      +
    443A  GLY      3.5     6.1    -      -       -      +
    445A  PHE*     1.3    78.5    -      -       +      +
    447A  LEU*     1.3    64.3    +      -       -      +
    449A  HIS*     2.8    22.3    +      -       -      +
    450A  LEU*     3.1    27.6    +      -       +      +
    475A  LEU*     5.1     7.4    -      -       +      -
    476A  LYS      3.7    23.8    -      -       -      +
    477A  PRO*     4.4     5.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 447 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    351A  ILE*     4.4     6.7    -      -       +      -
    354A  LEU*     4.3    21.1    -      -       +      -
    355A  TYR*     3.8    22.0    -      -       +      +
    405A  ILE*     3.5    32.8    -      -       +      +
    408A  PHE*     4.3     8.2    -      -       +      -
    409A  THR*     3.3    25.1    -      -       +      +
    412A  LEU*     4.4     4.5    -      -       +      -
    443A  GLY      2.8    20.3    +      -       -      +
    444A  LEU*     3.8     8.5    -      -       +      +
    445A  PHE      3.4     0.2    -      -       -      -
    446A  VAL*     1.3    72.6    -      -       -      +
    448A  THR*     1.3    61.0    +      -       -      +
    450A  LEU*     3.5    14.5    +      -       +      -
    451A  LEU*     3.1    29.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 448 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355A  TYR*     2.6    26.0    +      -       -      -
    444A  LEU      2.7    14.3    +      -       -      -
    445A  PHE*     3.4     9.6    -      -       -      -
    446A  VAL      3.0     0.2    +      -       -      -
    447A  LEU*     1.3    77.1    -      -       -      +
    449A  HIS*     1.3    58.0    +      -       -      +
    452A  TYR*     3.0    26.3    +      -       -      +
    459A  MET*     3.3    38.8    -      -       +      +
    462A  ALA*     4.2     0.7    -      -       +      +
    463A  LEU*     4.2    16.2    -      -       +      +
    466A  LEU*     3.6    11.9    -      -       -      +
    471A  PHE*     3.7    16.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 449 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40A  LEU*     4.3     9.3    -      -       +      +
     41A  ARG*     5.3     1.0    +      -       -      -
    389A  TYR*     4.3     1.0    +      -       -      -
    445A  PHE*     2.9    55.8    -      +       -      -
    446A  VAL*     2.8     9.0    +      -       -      +
    448A  THR*     1.3    76.3    -      -       +      +
    450A  LEU*     1.3    68.2    +      -       -      +
    452A  TYR*     3.3     7.1    +      -       -      +
    453A  PRO*     3.1    20.8    -      -       -      +
    463A  LEU*     5.1     0.4    -      -       -      +
    471A  PHE*     3.8    21.0    -      +       +      -
    472A  LEU*     2.9    52.5    +      -       +      -
    475A  LEU*     3.5    33.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 450 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385A  SER*     5.6     1.6    -      -       -      -
    386A  ILE*     4.3    18.6    -      -       +      +
    389A  TYR*     2.6    55.5    +      -       +      -
    404A  GLU*     5.5     1.3    -      -       +      +
    405A  ILE*     3.2    28.0    -      -       +      +
    408A  PHE*     4.1    32.8    -      -       +      -
    446A  VAL*     3.1    17.5    +      -       +      +
    447A  LEU*     3.6    13.7    -      -       +      +
    449A  HIS*     1.3    78.5    -      -       -      +
    451A  LEU*     1.3    60.0    +      -       -      +
    453A  PRO*     3.3     1.9    -      -       -      +
    454A  ILE*     4.3     3.6    -      -       -      +
    475A  LEU*     3.5    22.4    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    320A  TYR*     4.7    19.3    -      -       +      -
    347A  LEU*     5.7     2.5    -      -       +      -
    351A  ILE*     3.7    32.3    -      -       +      -
    355A  TYR*     4.9     0.2    -      -       -      +
    402A  ILE*     5.8     0.7    -      -       +      -
    405A  ILE*     3.5    31.0    -      -       +      -
    447A  LEU*     3.1    18.8    +      -       +      +
    450A  LEU*     1.3    76.3    -      -       -      +
    452A  TYR*     1.3    65.2    +      -       -      +
    453A  PRO      3.2     2.9    -      -       -      -
    454A  ILE*     2.9    16.4    +      -       +      +
    455A  THR*     2.8    40.9    +      -       +      -
    459A  MET*     3.6    30.1    -      -       +      -
    492A  PHE*     6.0     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 452 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  ARG*     2.9    53.4    +      -       +      +
     39A  ARG*     5.9     3.7    -      -       +      +
     40A  LEU*     3.6    25.6    -      -       +      -
     90A  GLU*     4.6     1.6    +      -       -      -
    448A  THR      3.0    18.9    +      -       -      +
    449A  HIS*     3.6     4.5    -      -       -      +
    451A  LEU*     1.3    74.6    -      -       -      +
    453A  PRO*     1.3    72.4    -      -       +      +
    456A  PRO*     3.1    53.2    -      -       +      +
    459A  MET*     3.5     8.9    -      -       +      +
    460A  LYS*     4.6    10.2    -      -       -      -
    471A  PHE*     3.8    35.9    -      +       +      -
----------------------------------------------------------
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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