Contacts of the helix formed by residues 466 - 493 (chain A) in PDB entry 4MG5


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 LEU 466 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    465A  THR*     1.3    74.2    -      -       -      +
    467A  LYS*     1.3    60.7    +      -       -      +
    469A  LEU*     3.6    16.2    -      -       +      +
    470A  GLU*     3.3    18.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 467 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    465A  THR*     3.0    11.8    +      -       -      +
    466A  LEU*     1.3    75.8    -      -       -      +
    468A  SER*     1.3    59.0    +      -       -      +
    469A  LEU      2.9     4.3    -      -       -      -
    470A  GLU*     2.9    24.0    +      -       -      +
    471A  GLU*     3.1    17.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 468 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  ASP*     6.0     2.0    -      -       -      -
    461A  PHE*     4.6    16.2    -      -       -      +
    464A  SER*     3.6    31.6    -      -       -      -
    465A  THR*     3.4     6.8    +      -       -      -
    467A  LYS*     1.3    77.9    -      -       -      +
    469A  LEU*     1.3    64.6    +      -       -      +
    471A  GLU*     3.5    15.2    -      -       -      +
    472A  LYS*     3.4    19.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 469 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464A  SER      5.7     4.3    -      -       -      +
    465A  THR      3.0    20.6    -      -       -      +
    466A  LEU*     3.6    16.8    -      -       +      +
    467A  LYS      2.9     0.8    -      -       -      -
    468A  SER*     1.3    82.2    -      -       -      +
    470A  GLU*     1.3    64.0    +      -       -      +
    471A  GLU      3.1     1.6    -      -       -      -
    472A  LYS*     3.4     8.8    +      -       +      +
    473A  ASP*     3.1    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 470 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    466A  LEU      3.3     9.7    +      -       -      +
    467A  LYS*     2.9    12.0    +      -       -      +
    469A  LEU*     1.3    77.4    -      -       -      +
    471A  GLU*     1.3    68.3    +      -       -      +
    473A  ASP*     3.3     9.6    +      -       -      +
    474A  HIS*     3.2    20.4    +      -       -      +
    477A  ARG*     4.9     2.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 471 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369A  ASP      4.7     2.0    -      -       -      +
    370A  LEU*     3.8    14.0    -      -       +      +
    371A  THR*     3.4    30.1    +      -       +      +
    374A  ASP*     3.1    31.4    -      -       -      +
    461A  PHE*     5.1     3.6    -      -       +      -
    467A  LYS      3.1    15.5    +      -       -      +
    468A  SER*     3.5    15.5    -      -       -      +
    469A  LEU      3.1     0.2    -      -       -      -
    470A  GLU*     1.3    77.7    -      -       -      +
    472A  LYS*     1.3    66.8    +      -       -      +
    473A  ASP      3.0     2.2    +      -       -      -
    474A  HIS*     3.0    15.9    +      -       -      +
    475A  ILE*     3.4    16.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 472 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    458A  VAL*     4.2    14.2    -      -       +      +
    459A  TYR*     6.3     0.4    -      -       +      -
    461A  PHE*     4.1    24.3    -      -       +      -
    468A  SER      3.4    11.2    +      -       -      +
    469A  LEU*     3.4    13.4    +      -       +      +
    471A  GLU*     1.3    78.5    -      -       -      +
    473A  ASP*     1.3    60.1    +      -       -      +
    475A  ILE*     3.7     4.9    +      -       -      +
    476A  HIS*     2.8    34.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 473 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    469A  LEU      3.1    14.1    +      -       -      +
    470A  GLU*     3.4    14.1    -      -       -      +
    471A  GLU      3.0     1.0    -      -       -      -
    472A  LYS*     1.3    76.7    -      -       -      +
    474A  HIS*     1.3    65.9    +      -       -      +
    476A  HIS*     3.3    19.4    +      -       -      +
    477A  ARG*     2.7    51.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 474 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305A  SER*     3.6    22.7    -      -       -      -
    307A  ALA*     5.1     0.4    -      -       +      -
    308A  LEU*     3.9    28.8    -      -       +      +
    366A  GLY*     4.1     5.2    +      -       -      -
    369A  ASP*     3.4    27.1    +      -       +      +
    370A  LEU*     4.1    20.9    -      -       +      -
    470A  GLU      3.2    11.1    +      -       -      +
    471A  GLU*     3.0    10.1    +      -       -      +
    473A  ASP*     1.3    75.1    -      -       -      +
    475A  ILE*     1.3    67.0    +      -       -      +
    477A  ARG*     3.1    26.7    +      -       -      +
    478A  VAL*     3.2    28.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 475 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  LEU*     3.9    33.4    -      -       +      -
    374A  ASP*     5.9     0.4    -      -       +      -
    378A  LEU*     4.2     7.4    -      -       +      -
    454A  LEU*     3.5    41.3    -      -       +      +
    458A  VAL*     4.0    10.3    -      -       +      -
    461A  PHE*     3.7    35.9    -      -       +      -
    471A  GLU*     3.4    12.3    +      -       +      +
    472A  LYS      3.8     6.3    -      -       -      +
    473A  ASP      3.3     0.6    -      -       -      -
    474A  HIS*     1.3    77.2    -      -       -      +
    476A  HIS*     1.3    57.5    +      -       -      +
    478A  VAL*     3.3     9.1    +      -       -      +
    479A  LEU*     2.9    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 476 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    455A  ASN*     5.9     0.2    -      -       -      -
    458A  VAL*     4.1    15.5    -      -       +      +
    459A  TYR*     3.0    43.1    -      +       -      -
    472A  LYS*     2.8    31.3    +      -       +      +
    473A  ASP*     3.3    14.1    +      -       -      +
    474A  HIS      3.1     1.0    -      -       -      -
    475A  ILE*     1.3    77.4    -      -       -      +
    477A  ARG*     1.3    57.1    +      -       +      +
    479A  LEU*     3.4    15.9    +      -       +      +
    480A  ASP*     2.9    38.5    +      -       -      +
    434B  ARG*     3.6    29.7    +      -       -      +
    506B  GLN*     5.7     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 477 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308A  LEU*     3.6    36.9    -      -       +      +
    470A  GLU      4.9     1.8    +      -       -      -
    473A  ASP*     2.7    39.8    +      -       -      +
    474A  HIS*     3.1    25.8    +      -       -      +
    476A  HIS*     1.3    75.2    -      -       +      +
    478A  VAL*     1.3    65.9    +      -       -      +
    480A  ASP*     3.3    12.2    +      -       -      +
    481A  LYS*     3.0    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 478 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  ALA*     4.6     6.7    -      -       +      -
    308A  LEU*     4.1     7.9    -      -       +      -
    315A  MET*     5.2     7.6    -      -       +      -
    364A  VAL*     5.9     0.2    -      -       +      -
    365A  PRO*     3.4    23.6    -      -       +      +
    366A  GLY*     4.5     4.9    -      -       -      -
    454A  LEU*     3.4    25.1    -      -       +      -
    474A  HIS*     3.2    41.6    +      -       +      +
    475A  ILE*     3.6     8.5    -      -       -      +
    477A  ARG*     1.3    73.3    -      -       -      +
    479A  LEU*     1.3    64.4    +      -       -      +
    481A  LYS*     3.0    18.2    +      -       -      +
    482A  ILE*     3.0    18.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 479 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451A  ILE*     3.9    38.1    -      -       +      +
    454A  LEU*     3.8    24.9    -      -       +      +
    455A  ASN*     4.3    22.7    -      -       +      +
    458A  VAL*     5.1     1.6    -      -       +      -
    475A  ILE*     2.9    33.5    +      -       +      +
    476A  HIS*     3.6    23.6    -      -       +      +
    478A  VAL*     1.3    75.6    -      -       -      +
    480A  ASP*     1.3    63.8    +      -       -      +
    482A  ILE*     3.0    17.4    +      -       +      +
    483A  THR*     3.0    17.0    +      -       -      -
    509B  LEU*     4.4    13.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 480 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    476A  HIS*     2.9    25.8    +      -       -      +
    477A  ARG*     3.5    13.1    -      -       -      +
    478A  VAL      3.2     0.2    -      -       -      -
    479A  LEU*     1.3    77.7    -      -       -      +
    481A  LYS*     1.3    62.3    +      -       -      +
    483A  THR*     3.3    10.2    +      -       -      -
    484A  ASP*     3.0    29.5    +      -       -      +
    502B  GLN*     3.7    30.8    +      -       -      +
    506B  GLN*     2.9    37.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 481 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307A  ALA      5.4     4.9    -      -       -      +
    308A  LEU*     5.5     7.6    -      -       +      +
    310A  LEU      6.0     1.8    -      -       -      +
    315A  MET*     4.2    18.8    -      -       +      -
    477A  ARG      3.0    11.7    +      -       -      +
    478A  VAL*     3.0    15.6    +      -       -      +
    480A  ASP*     1.3    77.8    -      -       -      +
    482A  ILE*     1.3    56.3    +      -       -      +
    484A  ASP*     3.3    13.6    +      -       -      +
    485A  THR*     2.8    29.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 482 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  MET*     4.6    19.7    -      -       +      -
    319A  LEU*     5.3     2.0    -      -       +      -
    364A  VAL*     5.8     1.3    -      -       +      -
    447A  CYS*     3.8    26.9    -      -       +      +
    450A  SER*     3.9    25.6    -      -       -      -
    451A  ILE*     3.6    34.8    -      -       +      +
    454A  LEU*     4.0    24.2    -      -       +      -
    478A  VAL*     3.0    13.0    +      -       +      +
    479A  LEU*     3.0     9.5    +      -       -      +
    481A  LYS*     1.3    73.8    -      -       -      +
    483A  THR*     1.3    61.1    +      -       -      +
    485A  THR*     3.2     7.8    +      -       -      -
    486A  LEU*     2.9    27.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 483 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451A  ILE*     5.3     4.4    -      -       -      +
    479A  LEU      3.0    13.3    +      -       -      -
    480A  ASP*     3.3    13.2    +      -       -      -
    482A  ILE*     1.3    74.3    -      -       -      +
    484A  ASP*     1.3    65.1    +      -       -      +
    486A  LEU*     3.2    11.9    +      -       -      +
    487A  ILE*     3.0    22.2    +      -       -      +
    504A  LEU*     3.9    14.0    -      -       +      +
    508A  LEU*     5.5     0.9    -      -       -      +
    501B  HIS*     3.4    40.8    -      -       +      +
    502B  GLN*     4.2     3.6    -      -       -      -
    505B  ALA*     3.3    24.1    -      -       +      +
    509B  LEU*     5.7     2.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 484 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312A  ALA*     5.3     2.5    -      -       +      -
    480A  ASP      3.0    13.0    +      -       -      +
    481A  LYS*     3.4    13.7    -      -       -      +
    483A  THR*     1.3    75.2    -      -       -      +
    485A  THR*     1.3    57.9    +      -       -      +
    487A  ILE*     3.4     3.1    +      -       -      +
    488A  HIS*     2.9    30.5    +      -       -      +
    498B  GLN*     3.9    13.9    +      -       -      +
    501B  HIS*     2.8    35.8    +      -       +      -
    502B  GLN*     3.1    25.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 485 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312A  ALA*     3.7    18.0    -      -       +      +
    315A  MET*     3.6    24.5    -      -       +      +
    316A  VAL*     3.4    32.3    -      -       +      -
    447A  CYS*     3.8    15.9    -      -       -      -
    481A  LYS      2.8    15.4    +      -       -      -
    482A  ILE*     3.3    11.7    -      -       -      -
    484A  ASP*     1.3    73.4    -      -       -      +
    486A  LEU*     1.3    65.2    +      -       -      +
    488A  HIS*     3.3     8.0    +      -       +      +
    489A  LEU*     3.0    23.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 486 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444A  GLU*     4.0    24.7    -      -       +      +
    447A  CYS*     3.6    25.8    -      -       +      -
    448A  LEU*     4.6     6.7    -      -       +      -
    451A  ILE*     4.0    25.4    -      -       +      -
    482A  ILE      2.9    14.3    +      -       -      +
    483A  THR*     3.2    10.1    +      -       -      +
    485A  THR*     1.3    77.4    -      -       -      +
    487A  ILE*     1.3    62.3    +      -       -      +
    489A  LEU*     3.2     8.7    +      -       +      +
    490A  MET*     3.1    31.3    +      -       +      +
    504A  LEU*     3.7    28.3    -      -       +      -
    507A  LEU*     4.3    17.7    -      -       +      -
    508A  LEU*     4.5     7.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 487 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    483A  THR      3.0    17.4    +      -       -      +
    484A  ASP      3.7     6.7    -      -       -      +
    486A  LEU*     1.3    74.6    -      -       -      +
    488A  HIS*     1.3    64.2    +      -       -      +
    490A  MET*     3.0     7.0    +      -       -      +
    491A  ALA*     2.8    24.2    +      -       +      +
    497A  LEU*     6.2     0.9    -      -       +      -
    500A  GLN*     3.4    48.6    -      -       +      +
    501A  HIS*     4.3     5.4    -      -       +      +
    504A  LEU*     4.0    20.0    -      -       +      -
    501B  HIS*     3.6    42.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 488 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312A  ALA*     3.4    28.6    -      -       +      +
    313A  ASP*     3.0    34.6    +      -       -      -
    316A  VAL*     5.7     0.7    -      -       +      -
    484A  ASP      2.9    14.5    +      -       -      +
    485A  THR      3.3     9.6    -      -       -      +
    487A  ILE*     1.3    77.8    -      -       -      +
    489A  LEU*     1.3    74.0    +      -       +      +
    491A  ALA*     3.4     5.9    +      -       -      +
    492A  LYS*     3.0    47.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 489 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313A  ASP*     5.8     1.1    -      -       -      +
    316A  VAL*     4.1    19.7    -      -       +      -
    443A  GLU*     3.6    51.6    -      -       +      +
    444A  GLU*     4.0    15.0    -      -       +      +
    447A  CYS*     4.3    12.8    -      -       -      -
    485A  THR      3.0    18.3    +      -       -      +
    486A  LEU*     3.5     9.2    -      -       -      +
    487A  ILE      3.2     0.2    -      -       -      -
    488A  HIS*     1.3    84.5    -      -       +      +
    490A  MET*     1.3    64.5    +      -       +      +
    492A  LYS*     3.3     7.2    +      -       +      +
    493A  ALA*     3.0    23.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 490 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444A  GLU*     4.2    13.5    -      -       -      +
    486A  LEU*     3.1    28.2    +      -       +      +
    487A  ILE*     3.0     7.7    +      -       -      +
    489A  LEU*     1.3    76.1    -      -       +      +
    491A  ALA*     1.3    61.8    +      -       -      +
    493A  ALA*     3.3    10.6    +      -       -      -
    495A  LEU*     3.2    34.9    +      -       +      +
    500A  GLN*     3.3    39.5    -      -       +      +
    503A  ARG*     3.8    19.7    -      -       +      -
    504A  LEU*     3.6    21.1    -      -       +      +
    507A  LEU*     3.4    34.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 491 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    487A  ILE*     2.8    18.3    +      -       +      +
    488A  HIS*     3.7     7.4    -      -       -      +
    490A  MET*     1.3    74.7    -      -       -      +
    492A  LYS*     1.3    60.6    +      -       +      +
    494A  GLY*     2.9    21.8    +      -       -      -
    495A  LEU      4.5     1.4    -      -       -      +
    500A  GLN*     3.6    27.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 492 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    488A  HIS*     3.0    43.4    +      -       +      +
    489A  LEU*     3.6     9.6    -      -       +      +
    491A  ALA*     1.3    76.1    -      -       +      +
    493A  ALA*     1.3    59.9    +      -       -      +
    494A  GLY*     2.9     6.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 493 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    489A  LEU      3.0    15.5    +      -       -      +
    490A  MET*     3.7     7.9    -      -       -      +
    491A  ALA      3.2     0.6    -      -       -      -
    492A  LYS*     1.3    73.8    -      -       -      +
    494A  GLY*     1.3    60.6    +      -       -      +
    495A  LEU*     3.5    16.7    +      -       +      +
----------------------------------------------------------
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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