Contacts of the helix formed by residues 473 - 501 (chain A) in PDB entry 3DYQ


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 PRO 473 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    469A  THR*     3.2    16.4    -      -       +      +
    470A  LYS      5.2     2.5    -      -       -      +
    471A  LEU      3.7     7.4    -      -       -      +
    472A  PHE*     1.3    83.3    -      -       -      +
    474A  MET*     1.3    73.1    +      -       +      +
    475A  VAL      2.9     6.3    -      -       -      -
    476A  GLU*     2.9    22.9    +      -       -      +
    477A  GLU*     4.3     1.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 474 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    270A  LEU*     3.3    43.1    -      -       +      +
    271A  CYS*     4.5     5.6    -      -       -      -
    272A  SER*     5.4     5.8    -      -       -      +
    472A  PHE*     3.6    31.0    -      -       +      -
    473A  PRO*     1.3    86.0    -      -       +      +
    475A  VAL*     1.3    63.5    +      -       -      +
    476A  GLU      3.2     0.5    +      -       -      -
    477A  GLU*     3.6     6.6    +      -       -      +
    478A  ILE*     3.5    24.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 475 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267A  MET*     4.8     2.5    -      -       +      -
    270A  LEU*     3.9    15.5    -      -       +      -
    271A  CYS*     3.7    29.8    -      -       -      -
    465A  PHE*     4.1    30.1    -      -       +      +
    468A  VAL*     4.0    11.9    -      -       +      -
    469A  THR*     3.3    17.3    -      -       -      +
    472A  PHE*     3.0    20.5    +      -       +      +
    473A  PRO      2.9     1.4    -      -       -      -
    474A  MET*     1.3    80.8    -      -       -      +
    476A  GLU*     1.3    62.8    +      -       -      +
    479A  MET*     3.0    27.9    +      -       +      -
    480A  LEU*     3.3     3.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 476 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    469A  THR*     3.8    17.4    +      -       +      +
    473A  PRO      2.9    13.8    +      -       -      +
    475A  VAL*     1.3    78.4    -      -       -      +
    477A  GLU*     1.3    64.2    +      -       -      +
    480A  LEU*     3.1    38.6    +      -       +      +
    481A  GLN*     3.2    12.6    +      -       -      +
    484A  TRP*     3.3    30.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 477 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    473A  PRO      4.3     1.0    +      -       -      +
    474A  MET*     3.6     7.4    +      -       -      +
    475A  VAL      3.3     0.2    -      -       -      -
    476A  GLU*     1.3    80.8    -      -       +      +
    478A  ILE*     1.3    80.0    +      -       +      +
    481A  GLN*     3.4    46.0    +      -       -      +
    482A  PRO*     4.0     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 478 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  PRO*     3.6    33.1    -      -       +      +
    270A  LEU*     3.7    26.7    -      -       +      -
    407A  VAL*     4.6     2.3    -      -       -      +
    474A  MET*     3.5    16.1    +      -       +      +
    475A  VAL      3.5     1.4    +      -       -      -
    476A  GLU      3.3     0.2    -      -       -      -
    477A  GLU*     1.3   101.5    -      -       +      +
    479A  MET*     1.3    70.7    +      -       +      +
    482A  PRO*     3.2    19.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 479 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199A  PRO*     5.2     1.8    -      -       +      -
    263A  MET*     3.7    26.9    -      -       +      +
    267A  MET*     3.5    23.8    -      -       -      +
    270A  LEU*     3.7    25.8    -      -       -      -
    400A  CYS*     6.0     0.2    -      -       +      -
    407A  VAL*     3.7    25.3    -      -       +      +
    465A  PHE*     3.5    34.5    -      -       +      -
    475A  VAL*     3.0    20.5    +      -       +      +
    477A  GLU      3.4     0.2    -      -       -      -
    478A  ILE*     1.3    92.3    -      -       +      +
    480A  LEU*     1.3    66.6    +      -       -      +
    481A  GLN      3.3     1.3    -      -       -      -
    482A  PRO*     3.5     4.3    -      -       -      +
    483A  LEU*     3.2    28.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 480 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462A  ILE*     3.9    19.1    -      -       +      +
    465A  PHE*     3.4    33.4    -      -       +      +
    466A  GLU*     4.1    19.1    -      -       +      -
    469A  THR*     3.5    26.7    -      -       +      +
    475A  VAL      3.3     2.6    +      -       -      +
    476A  GLU*     3.1    29.3    +      -       +      +
    479A  MET*     1.3    75.7    -      -       -      +
    481A  GLN*     1.3    59.4    +      -       -      +
    483A  LEU*     3.1    14.0    +      -       +      +
    484A  TRP*     2.8    57.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 481 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    476A  GLU*     3.2     9.0    +      -       -      +
    477A  GLU*     3.4    42.0    +      -       -      +
    480A  LEU*     1.3    76.1    -      -       -      +
    482A  PRO*     1.3    72.0    -      -       +      +
    484A  TRP*     3.0    32.7    +      -       +      +
    485A  GLU*     2.9    36.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 482 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406A  GLU      4.3     3.9    -      -       -      +
    407A  VAL      3.3    29.4    -      -       -      +
    408A  ARG      4.7     4.7    -      -       -      +
    409A  PRO*     6.1     0.9    -      -       +      -
    477A  GLU      4.0     0.7    -      -       -      +
    478A  ILE      3.2    28.3    -      -       -      +
    479A  MET*     3.5     8.3    -      -       -      +
    481A  GLN*     1.3    95.3    -      -       +      +
    483A  LEU*     1.3    55.7    +      -       -      +
    485A  GLU*     3.2    13.9    +      -       +      +
    486A  SER*     2.8    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 483 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406A  GLU*     3.6    38.8    -      -       +      +
    407A  VAL*     3.9     8.5    -      -       +      +
    457A  ILE*     3.7    11.6    -      -       +      +
    461A  LEU*     3.9    29.2    -      -       +      -
    462A  ILE*     4.1    13.0    -      -       +      +
    465A  PHE*     3.9    27.8    -      -       +      -
    479A  MET      3.2    16.8    +      -       -      +
    480A  LEU*     3.1    21.7    +      -       +      +
    481A  GLN      3.1     0.6    -      -       -      -
    482A  PRO*     1.3    72.8    -      -       -      +
    484A  TRP*     1.3    67.0    +      -       -      +
    486A  SER*     3.8     2.6    -      -       -      -
    487A  ARG*     2.9    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 484 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    462A  ILE*     3.6    29.2    -      -       +      +
    466A  GLU*     5.2     3.8    +      -       +      -
    476A  GLU*     3.3    32.3    -      -       +      -
    480A  LEU*     2.8    39.9    +      -       +      +
    481A  GLN*     3.0    36.8    +      -       +      +
    483A  LEU*     1.3    75.7    -      -       -      +
    485A  GLU*     1.3    64.8    +      -       +      +
    487A  ARG*     3.4    29.3    +      -       -      +
    488A  ASP*     3.1    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 485 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    481A  GLN*     2.9    28.9    +      -       +      +
    482A  PRO*     3.5    13.2    -      -       +      +
    484A  TRP*     1.3    79.2    -      -       +      +
    486A  SER*     1.3    57.5    +      -       -      +
    488A  ASP*     3.4     7.4    +      -       -      +
    489A  ARG*     3.0    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 486 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406A  GLU*     2.5    33.5    +      -       -      -
    410A  MET*     5.9     4.5    -      -       -      +
    457A  ILE*     3.8     9.0    -      -       -      -
    482A  PRO      2.8    20.2    +      -       -      -
    483A  LEU*     3.8     5.4    -      -       -      -
    485A  GLU*     1.3    68.9    -      -       -      +
    487A  ARG*     1.3    70.5    +      -       -      +
    489A  ARG*     3.1     8.9    +      -       -      +
    490A  TYR*     2.9    41.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 487 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454A  ILE*     4.4     5.7    -      -       +      +
    457A  ILE*     3.7    20.7    -      -       +      +
    458A  LYS*     4.0    37.5    -      -       +      +
    462A  ILE*     4.0    10.3    -      -       +      +
    483A  LEU      2.9    18.3    +      -       -      +
    484A  TRP*     3.4    44.6    +      -       -      +
    486A  SER*     1.3    76.8    -      -       -      +
    488A  ASP*     1.3    89.2    +      -       -      +
    490A  TYR*     3.3     3.4    +      -       -      +
    491A  GLU*     3.0    41.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 488 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    484A  TRP*     3.1    14.4    +      -       -      +
    485A  GLU*     3.7     6.9    -      -       -      +
    486A  SER      3.1     0.4    -      -       -      -
    487A  ARG*     1.3   116.2    +      -       -      +
    489A  ARG*     1.3    58.0    +      -       -      +
    491A  GLU*     3.4    16.3    +      -       -      +
    492A  GLU*     3.1    36.3    +      -       -      +
    495A  ARG*     5.4     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 489 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410A  MET*     3.8    43.6    -      -       -      +
    414A  GLU*     3.8    26.9    +      -       -      +
    485A  GLU      3.0    17.7    +      -       -      +
    486A  SER*     3.7     7.4    +      -       -      +
    488A  ASP*     1.3    74.9    -      -       -      +
    490A  TYR*     1.3    97.8    +      -       +      +
    492A  GLU*     3.2    14.2    +      -       +      +
    493A  LEU*     2.9    35.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 490 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    406A  GLU*     3.6    21.6    +      -       -      -
    414A  GLU*     3.6    25.8    +      -       -      +
    417A  VAL*     3.6    10.7    -      -       -      +
    449A  LYS*     4.5    11.1    +      -       +      -
    450A  ALA*     3.7    18.4    -      -       -      +
    453A  GLN*     3.6    26.5    -      -       +      -
    454A  ILE*     3.6    24.3    -      -       +      +
    457A  ILE*     4.1     4.0    -      -       +      -
    486A  SER*     2.9    43.3    +      -       -      +
    487A  ARG*     3.9     1.8    -      -       -      +
    489A  ARG*     1.3    96.4    +      -       -      +
    491A  GLU*     1.3    57.4    +      -       -      +
    493A  LEU*     3.5    19.6    -      -       +      +
    494A  LYS*     2.9    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 491 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454A  ILE*     3.9    20.9    -      -       +      +
    458A  LYS*     3.4    33.3    +      -       -      +
    487A  ARG*     3.0    20.9    +      -       -      +
    488A  ASP*     3.6    25.9    -      -       -      +
    490A  TYR*     1.3    77.5    -      -       -      +
    492A  GLU*     1.3    61.4    +      -       -      +
    494A  LYS*     3.5     5.1    +      -       +      +
    495A  ARG*     3.2    35.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 492 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    488A  ASP*     3.1    26.7    +      -       -      +
    489A  ARG*     3.4    14.5    -      -       +      +
    491A  GLU*     1.3    77.1    -      -       -      +
    493A  LEU*     1.3    63.8    +      -       -      +
    495A  ARG*     3.0    44.4    +      -       -      +
    496A  ILE*     3.3    10.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 493 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    414A  GLU*     5.5     2.2    -      -       -      +
    449A  LYS*     4.8    11.7    -      -       +      -
    450A  ALA*     4.3     9.9    -      -       +      +
    489A  ARG*     2.9    24.9    +      -       +      +
    490A  TYR*     3.5    34.1    -      -       +      +
    492A  GLU*     1.3    75.9    -      -       -      +
    494A  LYS*     1.3    52.7    +      -       -      +
    496A  ILE*     3.1    14.5    +      -       +      -
    497A  ASP*     2.8    50.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 494 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450A  ALA*     3.9    15.9    -      -       +      +
    451A  THR*     3.9    23.6    -      -       +      -
    454A  ILE*     4.1    17.5    -      -       +      -
    490A  TYR      2.9    16.6    +      -       -      +
    491A  GLU*     3.6     7.0    -      -       +      +
    493A  LEU*     1.3    73.7    -      -       -      +
    495A  ARG*     1.3    67.1    +      -       -      +
    496A  ILE      3.0     0.2    -      -       -      -
    497A  ASP*     3.8     5.6    -      -       +      +
    498A  ASP*     2.5    63.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 495 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    488A  ASP      5.4     0.4    +      -       -      -
    491A  GLU*     3.2    30.2    +      -       -      +
    492A  GLU*     3.0    42.1    +      -       -      +
    494A  LYS*     1.3    80.4    -      -       -      +
    496A  ILE*     1.3    63.4    +      -       +      +
    498A  ASP*     3.7     6.8    +      -       -      +
    499A  ALA*     3.2    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 496 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    492A  GLU      3.3     8.1    +      -       -      +
    493A  LEU*     3.1    19.5    +      -       +      +
    494A  LYS      3.0     0.6    -      -       -      -
    495A  ARG*     1.3    85.6    -      -       +      +
    497A  ASP*     1.3    64.2    +      -       -      +
    498A  ASP      3.2     1.3    -      -       -      -
    499A  ALA*     3.4     9.4    +      -       +      +
    500A  MET*     2.9    42.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 497 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    448A  THR*     4.1    21.5    -      -       +      +
    449A  LYS*     5.4     0.5    +      -       -      +
    450A  ALA*     4.2     7.1    +      -       -      +
    493A  LEU*     2.8    41.9    +      -       -      +
    494A  LYS*     3.8     7.2    -      -       +      +
    496A  ILE*     1.3    75.8    -      -       -      +
    498A  ASP*     1.3    61.1    -      -       -      +
    500A  MET*     3.2     7.0    +      -       -      +
    501A  LYS*     3.1    47.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 498 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451A  THR*     5.8     1.2    -      -       -      +
    494A  LYS*     2.5    55.5    +      -       -      +
    495A  ARG*     3.7     6.8    -      -       -      +
    497A  ASP*     1.3    75.7    -      -       -      +
    499A  ALA*     1.3    66.9    +      -       -      +
    501A  LYS*     3.1    20.5    +      -       -      +
    502A  GLU*     3.1    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 499 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    495A  ARG      3.2    12.5    +      -       -      +
    496A  ILE*     3.5    16.2    -      -       +      +
    498A  ASP*     1.3    77.9    -      -       -      +
    500A  MET*     1.3    64.5    +      -       +      +
    502A  GLU*     2.7    37.8    +      -       -      +
    503A  LEU*     3.4     7.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 500 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    496A  ILE*     2.9    33.7    +      -       +      +
    497A  ASP*     3.5     9.4    -      -       -      +
    498A  ASP      3.1     0.4    -      -       -      -
    499A  ALA*     1.3    82.7    -      -       +      +
    501A  LYS*     1.3    59.8    +      -       +      +
    502A  GLU      3.2     4.0    +      -       -      -
    503A  LEU*     3.3    37.1    -      -       +      +
    504A  GLN*     3.5    20.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 501 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    448A  THR*     3.6    28.8    -      -       -      +
    497A  ASP*     3.1    26.8    +      -       -      +
    498A  ASP*     3.1    14.3    +      -       -      +
    500A  MET*     1.3    73.7    -      -       +      +
    502A  GLU*     1.3    50.5    +      -       -      +
    503A  LEU      2.4    19.2    -      -       -      +
    504A  GLN*     3.7    21.1    -      -       -      +
    505A  LYS*     3.9    18.7    -      -       +      +
----------------------------------------------------------
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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