Contacts of the helix formed by residues 488 - 512 (chain A) in PDB entry 2H3W


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 488 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    486A  THR      3.9     6.5    -      -       -      +
    487A  VAL*     1.3    90.9    -      -       +      +
    489A  GLU*     1.3    58.6    +      -       -      +
    490A  GLN*     4.4     4.9    -      -       +      +
    491A  GLN*     2.7    45.0    +      -       +      +
    492A  LYS*     3.1     5.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 489 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    487A  VAL      3.3     3.3    +      -       -      -
    488A  PRO*     1.3    70.9    -      -       -      +
    490A  GLN*     1.3    61.6    +      -       -      +
    492A  LYS*     3.1    23.3    +      -       +      +
    493A  VAL      3.4     1.2    +      -       -      -
    616A  THR*     6.0     0.3    -      -       -      +
    617A  LEU*     3.1    43.1    -      -       +      +
    620A  ASN*     3.5    24.7    -      -       -      +
    621A  HIS*     2.7    29.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 490 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    488A  PRO*     3.1     4.9    -      -       +      +
    489A  GLU*     1.3    78.7    -      -       -      +
    491A  GLN*     1.3    64.3    +      -       -      +
    493A  VAL*     3.3    24.6    -      -       +      +
    494A  GLU*     3.2    32.0    +      -       -      +
    497A  ARG*     5.8     2.0    -      -       -      +
    621A  HIS*     3.8    29.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 491 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    487A  VAL*     3.6    20.2    -      -       +      -
    488A  PRO*     2.7    30.3    +      -       +      +
    490A  GLN*     1.3    80.3    +      -       -      +
    492A  LYS*     1.3    61.6    +      -       -      +
    493A  VAL      3.3     0.3    +      -       -      -
    494A  GLU*     2.9    39.8    +      -       -      +
    495A  LEU*     3.4    26.9    +      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    478A  PHE*     3.9     3.7    -      -       +      -
    481A  GLY      2.9    23.2    +      -       -      +
    482A  MET*     3.7    33.9    -      -       -      +
    484A  ASP      2.7    24.9    +      -       -      -
    485A  SER*     5.9     0.4    -      -       -      +
    487A  VAL*     2.6    34.1    +      -       +      +
    488A  PRO      3.1     7.8    +      -       -      +
    489A  GLU*     3.1    21.7    +      -       +      +
    491A  GLN*     1.3    75.1    -      -       -      +
    493A  VAL*     1.3    60.3    +      -       -      +
    495A  LEU*     3.4    12.2    +      -       -      +
    496A  LEU*     2.9    28.9    +      -       -      +
    617A  LEU*     3.7    17.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 493 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    489A  GLU      3.6    14.4    -      -       -      +
    490A  GLN*     3.3    15.7    -      -       +      +
    491A  GLN      3.1     0.2    -      -       -      -
    492A  LYS*     1.3    78.2    -      -       -      +
    494A  GLU*     1.3    63.1    +      -       -      +
    496A  LEU*     3.1     5.1    +      -       -      +
    497A  ARG*     3.0    63.6    +      -       -      +
    617A  LEU*     3.7    34.1    -      -       +      +
    618A  LEU*     4.0     9.9    -      -       +      -
    621A  HIS*     4.0    19.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 494 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    490A  GLN*     3.2    34.8    +      -       -      +
    491A  GLN*     2.9    35.4    +      -       -      +
    493A  VAL*     1.3    77.7    -      -       +      +
    495A  LEU*     1.3    58.6    +      -       +      +
    496A  LEU      3.3     0.2    +      -       -      -
    497A  ARG*     3.3    12.0    +      -       -      +
    498A  LYS*     2.9    32.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 495 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474A  ASP      4.5     2.0    -      -       -      +
    477A  ALA*     3.6    36.8    -      -       +      +
    478A  PHE*     3.7    17.5    -      -       +      +
    481A  GLY*     4.2    17.5    -      -       -      -
    487A  VAL*     5.1     3.8    -      -       +      -
    491A  GLN*     3.4    30.7    +      -       +      +
    492A  LYS*     3.4    12.5    +      -       -      +
    493A  VAL      3.3     0.4    -      -       -      -
    494A  GLU*     1.3    79.2    -      -       +      +
    496A  LEU*     1.3    61.6    +      -       -      +
    498A  LYS*     3.5    13.0    +      -       +      +
    499A  ALA*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 496 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427A  LEU*     4.2     7.2    -      -       +      -
    432A  PHE*     5.0     0.2    -      -       +      -
    435A  VAL*     5.0     0.2    -      -       -      +
    478A  PHE*     3.5    22.9    -      -       +      -
    492A  LYS      2.9    13.4    +      -       -      +
    493A  VAL*     3.1     9.1    +      -       -      +
    495A  LEU*     1.3    73.8    -      -       -      +
    497A  ARG*     1.3    67.2    +      -       -      +
    499A  ALA*     3.2     4.2    +      -       -      +
    500A  VAL*     3.0    42.1    +      -       +      +
    614A  MET*     3.7    47.3    -      -       +      +
    617A  LEU*     3.7    23.8    -      -       +      -
    618A  LEU*     4.1    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 497 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425A  GLU*     4.5    10.1    +      -       -      -
    427A  LEU*     4.2    25.4    -      -       +      +
    490A  GLN*     5.8     1.8    -      -       -      +
    493A  VAL*     3.0    44.6    +      -       +      +
    494A  GLU*     3.8    10.8    -      -       -      +
    496A  LEU*     1.3    77.9    -      -       -      +
    498A  LYS*     1.3    57.5    +      -       -      +
    500A  VAL*     3.3     2.4    +      -       -      +
    501A  GLN*     2.8    38.4    +      -       +      +
    618A  LEU*     4.2    17.6    +      -       +      +
    621A  HIS      4.0    11.9    +      -       -      -
    623A  ARG*     3.0    48.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 498 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    474A  ASP*     3.7    28.3    -      -       +      +
    494A  GLU      2.9    18.4    +      -       -      +
    495A  LEU*     3.7    15.3    -      -       +      +
    496A  LEU      3.2     0.2    -      -       -      -
    497A  ARG*     1.3    78.9    -      -       -      +
    499A  ALA*     1.3    56.7    +      -       -      +
    501A  GLN*     3.5     6.3    +      -       +      +
    502A  ALA*     2.9    30.1    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    435A  VAL*     3.9    16.6    -      -       +      +
    472A  SER*     5.5     0.5    +      -       -      -
    474A  ASP*     3.7    26.8    -      -       -      +
    475A  SER*     3.9    15.7    +      -       -      +
    478A  PHE*     4.1     7.9    -      -       +      -
    495A  LEU      3.0    17.8    +      -       -      +
    496A  LEU      3.2     4.5    +      -       -      +
    498A  LYS*     1.3    75.8    -      -       -      +
    500A  VAL*     1.3    59.3    +      -       -      +
    502A  ALA*     3.2     3.1    +      -       -      +
    503A  HIS*     2.9    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 500 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    427A  LEU*     3.9    26.2    -      -       +      -
    428A  SER*     4.1    16.8    -      -       -      +
    431A  ALA*     3.6    19.8    -      -       +      +
    432A  PHE*     4.2     9.9    -      -       +      +
    435A  VAL*     3.8    23.3    -      -       +      +
    496A  LEU*     3.0    33.3    +      -       +      +
    497A  ARG*     3.6     7.4    -      -       -      +
    499A  ALA*     1.3    75.7    -      -       -      +
    501A  GLN*     1.3    60.3    +      -       -      +
    503A  HIS*     3.2     3.8    +      -       -      +
    504A  ARG*     2.9    27.1    +      -       +      +
    614A  MET*     4.8     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 501 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    426A  LYS      4.3     8.9    +      -       -      -
    427A  LEU*     4.0    24.2    -      -       -      +
    428A  SER      5.3     1.0    -      -       -      +
    497A  ARG*     2.8    26.6    +      -       +      +
    498A  LYS*     3.8     7.0    -      -       -      +
    500A  VAL*     1.3    76.2    -      -       -      +
    502A  ALA*     1.3    58.4    +      -       -      +
    504A  ARG*     3.2    15.6    +      -       -      +
    505A  ALA*     2.9    29.9    +      -       -      +
   1601A  COA      5.2     4.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 502 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    472A  SER*     4.8     7.9    -      -       -      +
    474A  ASP*     3.2    33.7    -      -       +      +
    498A  LYS      2.9    15.4    +      -       -      +
    499A  ALA      3.4     5.2    -      -       -      +
    501A  GLN*     1.3    75.0    -      -       -      +
    503A  HIS*     1.3    58.1    +      -       -      +
    505A  ALA*     3.2     8.6    +      -       -      +
    506A  TYR*     3.0    27.3    +      -       -      +
    509A  ARG*     5.0     1.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 503 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    430A  ASP*     3.9     7.9    -      -       -      -
    431A  ALA*     3.5    21.3    -      -       +      +
    434A  GLN*     3.3    28.0    -      -       +      +
    435A  VAL*     4.6     5.6    -      -       +      -
    453A  GLU*     2.9    29.9    +      -       -      -
    468A  ILE*     3.7     8.9    -      -       +      +
    469A  ARG      5.0     1.8    -      -       -      -
    470A  SER*     3.5    28.4    +      -       -      -
    499A  ALA      2.9    16.4    +      -       -      +
    500A  VAL*     3.5     6.1    -      -       -      +
    502A  ALA*     1.3    74.3    -      -       -      +
    504A  ARG*     1.3    55.4    +      -       -      +
    506A  TYR*     3.3     6.3    +      -       -      +
    507A  THR*     2.7    52.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 504 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  LEU*     6.2     0.2    -      -       -      +
    428A  SER*     3.9    25.3    +      -       -      -
    430A  ASP*     5.9     0.2    -      -       -      +
    431A  ALA*     4.7     1.8    -      -       -      -
    500A  VAL      2.9    13.9    +      -       -      +
    501A  GLN*     3.5    22.2    -      -       -      +
    503A  HIS*     1.3    78.3    +      -       -      +
    505A  ALA*     1.3    58.1    +      -       -      +
    507A  THR*     3.4    31.6    +      -       -      +
    508A  ASP*     2.7    68.8    +      -       -      +
    511A  ILE*     4.3     8.7    -      -       -      +
   1601A  COA      2.8    49.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 505 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501A  GLN      2.9    12.6    +      -       -      +
    502A  ALA*     3.2    12.5    +      -       -      +
    504A  ARG*     1.3    76.4    -      -       -      +
    506A  TYR*     1.3    64.1    +      -       -      +
    508A  ASP*     3.3     8.9    +      -       -      +
    509A  ARG*     3.0    44.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 506 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  TYR*     5.8     3.4    -      -       +      -
     53A  ALA*     4.9     7.0    -      -       +      -
    467A  THR      3.5    21.2    +      -       -      -
    468A  ILE*     4.0    15.9    -      -       +      -
    469A  ARG*     3.5    46.7    +      -       +      +
    472A  SER*     5.8     6.7    -      -       -      -
    502A  ALA      3.0    13.9    +      -       -      +
    503A  HIS*     3.6    11.7    -      -       +      +
    504A  ARG      3.3     0.2    -      -       -      -
    505A  ALA*     1.3    76.0    -      -       -      +
    507A  THR*     1.3    58.2    +      -       -      +
    509A  ARG*     3.2    27.6    +      -       +      +
    510A  ALA*     2.8    26.9    +      -       +      +
    515A  ALA*     4.6    14.1    -      -       +      -
    516A  PHE*     3.2    34.3    +      +       -      -
    517A  ASP*     4.3     0.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 507 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    430A  ASP*     5.0     0.8    +      -       -      +
    468A  ILE*     3.6    15.6    -      -       +      +
    503A  HIS*     2.7    42.8    +      -       -      -
    504A  ARG*     3.5    30.6    -      -       -      +
    506A  TYR*     1.3    78.3    -      -       -      +
    508A  ASP*     1.3    60.3    +      -       -      +
    510A  ALA*     3.3     2.1    +      -       -      +
    511A  ILE*     3.1    24.2    +      -       +      +
   1601A  COA      3.4    38.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 508 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    504A  ARG*     2.7    58.6    +      -       -      +
    505A  ALA*     3.7     7.5    -      -       -      +
    506A  TYR      3.3     0.2    -      -       -      -
    507A  THR*     1.3    75.0    -      -       -      +
    509A  ARG*     1.3    63.9    +      -       +      +
    511A  ILE*     3.1    10.8    -      -       -      +
    512A  ARG*     2.9    49.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 509 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  TYR*     3.2    53.6    +      -       -      -
    502A  ALA      5.0     1.4    +      -       -      -
    505A  ALA*     3.0    36.8    +      -       -      +
    506A  TYR*     3.6    39.8    -      -       +      +
    508A  ASP*     1.3    75.0    -      -       +      +
    510A  ALA*     1.3    61.4    +      -       -      +
    512A  ARG*     3.2     8.8    +      -       -      +
    514A  GLU*     2.7    63.9    +      -       +      +
    515A  ALA*     4.1     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 510 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    455A  ALA*     3.8    10.1    -      -       +      -
    457A  LEU*     3.3    18.5    -      -       -      +
    466A  ASP*     4.3     4.2    -      -       +      +
    467A  THR      4.6     2.2    -      -       -      +
    468A  ILE*     3.5    27.4    -      -       +      -
    506A  TYR*     2.8    18.1    +      -       +      +
    507A  THR      3.6     2.7    -      -       -      +
    509A  ARG*     1.3    77.0    -      -       -      +
    511A  ILE*     1.3    62.6    +      -       -      +
    513A  GLY*     3.1    12.3    +      -       -      -
    515A  ALA*     3.9    23.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 511 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  LEU*     3.8    24.5    -      -       +      -
    164A  GLY*     4.9     5.6    -      -       -      -
    455A  ALA*     4.6     4.3    -      -       +      -
    456A  SER      3.5    28.0    -      -       -      +
    457A  LEU*     4.2     1.5    -      -       -      +
    459A  MET*     3.2    33.8    -      -       +      +
    460A  PHE*     3.7     2.8    -      -       -      -
    504A  ARG*     4.3     7.4    -      -       -      +
    507A  THR*     3.1    14.1    +      -       +      +
    508A  ASP*     3.1    24.7    -      -       -      +
    510A  ALA*     1.3    76.5    -      -       -      +
    512A  ARG*     1.3    78.0    +      -       +      +
    513A  GLY      3.3     1.1    -      -       -      -
   1601A  COA      3.5    28.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 512 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     39A  PRO*     4.4     4.0    -      -       -      +
    164A  GLY*     4.2    21.2    +      -       -      -
    166A  GLN*     5.9     1.9    -      -       -      +
    459A  MET*     4.0    17.7    -      -       +      +
    460A  PHE*     3.4    19.6    -      -       +      -
    508A  ASP*     2.9    45.8    +      -       -      +
    509A  ARG*     3.2     5.3    +      -       -      +
    510A  ALA      3.1     1.0    -      -       -      -
    511A  ILE*     1.3    99.2    -      -       -      +
    513A  GLY*     1.3    62.4    +      -       -      +
    514A  GLU*     3.3    23.8    +      -       -      +
----------------------------------------------------------
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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