Contacts of the helix formed by residues 397 - 420 (chain A) in PDB entry 2CSX


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 ASN 397 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284A  PHE*     5.9     1.3    -      -       -      -
    327A  PRO*     5.4     1.7    -      -       -      +
    328A  PHE*     5.4     4.0    +      -       -      -
    392A  TYR*     2.9    31.3    +      -       +      +
    393A  MET*     5.0     0.7    -      -       -      -
    395A  LYS*     3.0     8.6    -      -       +      +
    396A  VAL*     1.3    75.3    -      -       -      +
    398A  PHE*     1.3    58.5    +      -       -      +
    399A  TYR*     3.5     9.5    +      -       -      +
    400A  LYS*     2.9    48.4    +      -       -      +
    401A  ALA*     3.0    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 398 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30A  ALA*     3.4    39.7    -      -       +      -
     33A  THR*     3.0    22.9    -      -       -      -
     34A  ILE*     3.6    28.0    -      -       +      -
    255A  LEU*     5.5     0.9    -      -       +      -
    323A  LEU*     3.5    39.5    -      -       +      +
    328A  PHE*     3.9    23.8    -      +       +      +
    393A  MET*     3.9    21.1    -      -       +      -
    396A  VAL*     2.9    34.9    +      -       +      -
    397A  ASN*     1.3    72.7    -      -       -      +
    399A  TYR*     1.3    55.3    +      -       -      +
    401A  ALA*     3.5     5.1    -      -       -      +
    402A  ILE*     2.8    42.2    +      -       +      +
    454A  ILE*     6.4     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 399 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323A  LEU      3.8     6.0    +      -       -      -
    324A  ARG*     3.1    38.7    +      -       -      +
    325A  GLU      3.6    13.0    -      -       -      -
    326A  VAL      3.3    18.6    +      -       -      +
    327A  PRO*     3.6    39.7    -      -       +      -
    328A  PHE      4.4     2.3    -      -       -      +
    397A  ASN*     3.2     5.8    -      -       -      +
    398A  PHE*     1.3    80.8    -      -       -      +
    400A  LYS*     1.3    93.6    +      -       +      +
    402A  ILE*     3.5     3.5    +      -       -      +
    403A  GLU*     3.1    29.3    +      -       +      +
     13C    C      5.2     5.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 400 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327A  PRO*     5.6     4.0    -      -       -      +
    392A  TYR*     3.3    51.2    -      -       +      +
    397A  ASN*     2.9    32.0    +      -       -      +
    399A  TYR*     1.3   101.3    -      -       +      +
    401A  ALA*     1.3    61.6    +      -       -      +
    403A  GLU*     3.1    35.8    -      -       -      +
    404A  GLU*     3.1     8.0    +      -       -      +
     14C    A      5.7     4.2    +      -       -      -
     15C    G      5.9     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 401 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    389A  TYR*     3.9    10.9    -      -       +      -
    392A  TYR*     3.9    15.0    -      -       +      +
    393A  MET*     3.5    34.1    -      -       +      +
    397A  ASN      3.0    19.6    +      -       -      +
    398A  PHE      3.5     4.7    -      -       -      +
    399A  TYR      3.1     0.2    -      -       -      -
    400A  LYS*     1.3    73.5    -      -       -      +
    402A  ILE*     1.3    64.6    +      -       -      +
    403A  GLU      2.9     4.0    -      -       -      -
    404A  GLU*     2.8    17.8    +      -       -      +
    405A  ILE*     3.1    13.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 402 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320A  TYR*     4.0    13.7    -      -       +      -
    323A  LEU*     3.4    41.7    -      -       +      +
    324A  ARG*     3.5    31.0    -      -       +      -
    393A  MET*     5.5     3.1    -      -       +      -
    398A  PHE*     2.8    21.2    +      -       +      +
    399A  TYR      3.9     3.6    -      -       -      +
    401A  ALA*     1.3    73.0    -      -       +      +
    403A  GLU*     1.3    56.7    +      -       -      +
    405A  ILE*     3.1    16.3    +      -       +      +
    406A  LEU*     2.9    36.2    +      -       +      +
    451A  LEU*     6.1     0.7    -      -       +      -
    454A  ILE*     3.6    33.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 403 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392A  TYR*     5.3     1.6    +      -       -      -
    399A  TYR*     3.1    22.4    +      -       +      +
    400A  LYS*     3.1    38.5    -      -       -      +
    401A  ALA      2.9     0.4    -      -       -      -
    402A  ILE*     1.3    79.3    -      -       -      +
    404A  GLU*     1.3    64.4    +      -       -      +
    406A  LEU*     3.3    11.5    +      -       +      +
    407A  LYS*     2.8    60.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 404 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384A  GLU      4.4     2.3    -      -       -      +
    385A  SER*     4.4    13.4    +      -       -      +
    388A  ASN*     3.6    34.3    +      -       +      +
    389A  TYR*     4.0    17.9    -      -       +      +
    392A  TYR*     3.8    24.6    +      -       +      -
    400A  LYS      3.1    11.5    +      -       -      +
    401A  ALA      2.8     7.8    +      -       -      +
    403A  GLU*     1.3    81.3    -      -       -      +
    405A  ILE*     1.3    68.4    +      -       -      +
    407A  LYS*     3.7    25.7    -      -       -      +
    408A  PHE*     2.9    26.2    +      -       -      +
    450A  LEU*     5.8     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 405 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320A  TYR*     6.0     0.2    -      -       +      -
    351A  ILE*     4.9     6.1    -      -       +      -
    389A  TYR*     3.3    22.9    -      -       +      -
    401A  ALA      3.1    12.2    +      -       -      +
    402A  ILE*     3.1    22.4    +      -       +      +
    404A  GLU*     1.3    79.0    -      -       -      +
    406A  LEU*     1.3    57.5    +      -       +      +
    408A  PHE*     3.4     4.2    -      -       -      +
    409A  THR*     2.8    40.2    +      -       +      +
    447A  LEU*     3.8    16.4    -      -       +      -
    450A  LEU*     3.2    44.4    -      -       +      +
    451A  LEU*     3.5    28.0    -      -       +      -
    454A  ILE*     5.8     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 406 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320A  TYR*     3.6    26.0    -      -       +      +
    324A  ARG*     4.5     9.0    -      -       +      +
    346A  GLU*     4.0    24.9    -      -       +      +
    350A  GLU*     4.3    16.7    -      -       -      +
    351A  ILE*     4.3    20.0    -      -       +      -
    402A  ILE*     2.9    32.0    +      -       +      +
    403A  GLU*     3.6    12.1    -      -       +      +
    405A  ILE*     1.3    79.6    -      -       +      +
    407A  LYS*     1.3    55.8    +      -       +      +
    409A  THR*     3.2     8.1    +      -       -      +
    410A  SER*     3.0    33.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 407 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385A  SER*     5.4     1.1    -      -       -      +
    403A  GLU*     2.8    53.0    +      -       +      +
    404A  GLU*     3.8    28.7    -      -       -      +
    406A  LEU*     1.3    72.9    -      -       -      +
    408A  PHE*     1.3    58.6    +      -       -      +
    410A  SER*     4.0     7.0    -      -       -      -
    411A  TYR*     3.5    18.2    +      -       -      +
     23C    A      5.8     2.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 408 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  TYR*     4.2    17.5    -      +       -      -
    381A  ILE*     4.7     9.0    -      -       +      -
    382A  ALA*     4.1    20.9    -      -       +      -
    385A  SER*     3.4    26.7    +      -       -      +
    404A  GLU      2.9    17.4    +      -       -      +
    405A  ILE*     3.4     3.6    -      -       -      +
    407A  LYS*     1.3    76.5    -      -       -      +
    409A  THR*     1.3    67.3    +      -       -      +
    410A  SER      3.1     1.6    -      -       -      -
    411A  TYR*     3.4    10.5    +      +       -      +
    412A  LEU*     3.1    46.0    +      -       +      +
    443A  GLY*     3.4    26.5    -      -       -      -
    446A  VAL*     4.0    21.8    -      -       +      -
    447A  LEU*     4.0    11.9    -      -       +      -
    450A  LEU*     4.2    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 409 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350A  GLU*     3.9    26.8    +      -       -      +
    351A  ILE*     4.5    10.9    -      -       +      +
    354A  LEU*     3.6     6.4    -      -       -      +
    405A  ILE*     2.8    25.3    +      -       +      +
    406A  LEU*     3.2    11.6    +      -       -      +
    408A  PHE*     1.3    72.2    -      -       -      +
    410A  SER*     1.3    62.1    +      -       -      +
    412A  LEU*     3.5    13.3    +      -       -      +
    413A  ASN*     2.9    30.5    +      -       -      -
    447A  LEU*     3.4    34.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 410 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350A  GLU*     3.6    15.5    +      -       -      -
    406A  LEU      3.0    15.7    +      -       -      -
    407A  LYS*     4.0     8.3    -      -       -      -
    409A  THR*     1.3    79.5    +      -       -      +
    411A  TYR*     1.3    67.6    +      -       -      +
    413A  ASN*     2.8    21.7    +      -       -      +
    414A  LYS*     2.8    15.8    +      -       -      +
     40C    U      4.2    12.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 411 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  ASP*     5.4     0.2    +      -       -      -
    377A  GLU*     4.6     2.1    +      -       -      +
    378A  TYR*     3.3    47.3    -      +       -      +
    381A  ILE*     4.1    40.8    -      -       +      +
    407A  LYS      3.5    12.0    +      -       -      +
    408A  PHE*     3.4    13.2    +      +       -      +
    410A  SER*     1.3    78.1    -      -       -      +
    412A  LEU*     1.3    69.6    +      -       +      +
    414A  LYS*     3.2     8.5    +      -       +      +
    415A  TYR*     2.7    60.9    +      +       +      +
----------------------------------------------------------
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Residues in contact with LEU 412 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354A  LEU*     3.4    30.5    -      -       +      -
    378A  TYR*     4.2     6.1    -      -       +      -
    408A  PHE*     3.1    45.3    +      -       +      +
    409A  THR*     3.6     4.0    -      -       -      +
    410A  SER      3.1     0.6    -      -       -      -
    411A  TYR*     1.3    96.3    -      -       +      +
    413A  ASN*     1.3    68.8    +      -       -      +
    415A  TYR*     3.0    15.5    +      -       +      +
    416A  VAL*     3.1    17.5    +      -       -      +
    439A  ALA      5.1     0.7    -      -       -      +
    440A  LEU*     4.0    17.2    -      -       +      +
    443A  GLY*     3.9    29.6    -      -       -      +
    444A  LEU*     4.6     1.8    -      -       +      +
    447A  LEU*     4.8     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 413 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    349A  ASN      4.9     0.3    -      -       -      +
    350A  GLU*     3.1    38.6    +      -       -      +
    353A  ASN*     4.6     1.4    +      -       -      -
    354A  LEU*     3.8    13.9    +      -       -      +
    357A  ARG*     2.8    35.9    +      -       -      +
    409A  THR      2.9    21.6    +      -       -      -
    410A  SER*     2.8    14.1    +      -       -      +
    412A  LEU*     1.3    69.8    -      -       -      +
    414A  LYS*     1.3    64.1    +      -       -      +
    416A  VAL*     2.9    17.0    +      -       -      +
    417A  ASP      3.3     7.4    +      -       -      -
     39C    G      3.5    33.8    +      -       -      +
     40C    U      3.9     2.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 414 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410A  SER      2.8    14.2    +      -       -      +
    411A  TYR*     3.6    11.2    -      -       +      +
    413A  ASN*     1.3    74.4    -      -       -      +
    415A  TYR*     1.3    51.2    +      -       -      +
    417A  ASP*     3.0     3.7    +      -       +      +
    418A  GLU*     2.8    60.5    +      -       +      +
     40C    U      3.6    32.9    -      -       -      +
     41C    C      2.8    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 415 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  ASP*     3.0    27.4    +      -       -      +
    378A  TYR*     4.6     5.6    -      +       +      -
    411A  TYR*     2.7    51.0    +      +       +      +
    412A  LEU*     3.0    14.8    +      -       -      +
    414A  LYS*     1.3    72.4    -      -       -      +
    416A  VAL*     1.3    57.3    +      -       -      +
    418A  GLU*     4.5     4.9    -      -       -      -
    419A  LYS*     2.9    68.6    +      -       +      +
    435A  LYS*     5.3     0.2    -      -       -      +
    436A  VAL*     3.5    41.3    -      -       +      +
    439A  ALA*     4.0    11.2    -      -       +      +
    440A  LEU*     3.3    25.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 416 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    354A  LEU*     4.2     7.4    -      -       +      -
    357A  ARG*     3.8    15.5    -      -       +      +
    358A  VAL*     4.1    13.5    -      -       +      -
    361A  MET*     4.2    17.0    -      -       -      -
    412A  LEU      3.3    14.6    -      -       -      +
    413A  ASN      2.9     7.8    +      -       -      +
    415A  TYR*     1.3    76.1    -      -       -      +
    417A  ASP*     1.3    58.4    +      -       -      +
    420A  GLN      3.2    21.0    +      -       -      -
    421A  PRO*     3.5     4.8    -      -       +      +
    422A  TRP*     3.5     9.5    -      -       +      -
    440A  LEU*     3.5    29.4    -      -       +      -
     34C    C      3.7    27.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 417 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    357A  ARG*     5.2     2.7    -      -       -      +
    413A  ASN      3.3     7.3    +      -       -      +
    414A  LYS*     3.0     8.1    +      -       -      +
    416A  VAL*     1.3    79.5    -      -       -      +
    418A  GLU*     1.3    61.0    +      -       -      +
    419A  LYS      3.4     0.2    -      -       -      -
    420A  GLN*     3.5    18.2    +      -       -      +
    422A  TRP*     4.2     8.7    -      -       -      -
     32C    C      3.5     9.8    -      -       -      +
     34C    C      4.5     2.4    +      -       -      -
     39C    G      2.6    37.3    +      -       -      +
     40C    U      3.4    36.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 418 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    414A  LYS*     2.8    40.3    +      -       +      +
    415A  TYR*     4.0     4.7    -      -       -      +
    417A  ASP*     1.3    79.8    -      -       -      +
    419A  LYS*     1.3    76.3    +      -       +      +
    420A  GLN*     3.6     4.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 419 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  ASP*     4.7     5.9    +      -       -      -
    377A  GLU*     5.6     3.8    +      -       -      -
    415A  TYR*     2.9    63.8    +      -       +      +
    418A  GLU*     1.3    97.5    +      -       -      +
    420A  GLN*     1.3    75.8    +      -       -      +
    421A  PRO*     3.2     2.7    -      -       +      -
    424A  LEU*     3.7    16.5    -      -       +      +
    432A  GLU*     5.3     6.0    +      -       -      +
    436A  VAL*     3.3    35.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 420 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    416A  VAL      3.2     6.9    +      -       -      -
    417A  ASP      3.5    16.4    +      -       -      +
    418A  GLU      4.6     3.4    -      -       -      +
    419A  LYS*     1.3    81.0    -      -       -      +
    421A  PRO*     1.3    68.8    -      -       -      +
    422A  TRP*     3.0    28.9    -      -       +      +
    423A  ALA*     2.8    37.9    +      -       +      +
    424A  LEU*     3.1     4.5    +      -       -      +
     32C    C      3.8    19.2    +      -       -      -
----------------------------------------------------------
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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