Contacts of the helix formed by residues 491 - 516 (chain A) in PDB entry 4DAJ


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 THR 491 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  LEU*     4.5    14.5    -      -       +      +
    165A  ARG*     5.7     0.2    -      -       -      -
    489A  ALA      3.6     1.4    +      -       -      -
    490A  GLN*     1.3    89.3    +      -       -      +
    492A  LEU*     1.3    62.3    +      -       -      +
    493A  SER*     3.2     4.8    +      -       -      +
    494A  ALA*     3.3     3.3    +      -       -      +
    495A  ILE*     3.0    40.6    +      -       +      +
    542A  CYS      4.4     2.5    -      -       -      +
    543A  TYR*     4.3    15.9    -      -       +      -
    546A  CYS*     3.1    42.0    -      -       +      +
    547A  ASN*     3.2     5.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 492 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  LEU*     5.3     6.3    -      -       +      +
    161A  ILE*     3.4    33.2    -      -       +      -
    162A  SER*     3.8    28.3    -      -       -      +
    165A  ARG*     4.2    14.8    -      -       -      +
    250A  TYR*     4.0    26.9    -      -       +      -
    253A  ILE*     4.9    14.4    -      -       +      -
    489A  ALA*     3.9    15.9    -      -       -      +
    490A  GLN      2.9     7.0    +      -       -      +
    491A  THR*     1.3    74.7    -      -       -      +
    493A  SER*     1.3    68.2    +      -       -      +
    495A  ILE*     4.7     7.6    -      -       +      -
    496A  LEU*     2.9    32.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 493 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250A  TYR*     2.8    32.3    +      -       -      -
    254A  TYR*     4.9     4.7    -      -       -      -
    489A  ALA      3.9     9.2    +      -       -      -
    491A  THR      5.0     2.2    +      -       -      -
    492A  LEU*     1.3    80.1    -      -       -      +
    494A  ALA*     1.3    65.1    +      -       -      +
    496A  LEU*     3.5     3.1    -      -       -      +
    497A  LEU*     2.9    34.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 494 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    491A  THR*     3.3     8.7    +      -       -      +
    492A  LEU      3.3     0.4    -      -       -      -
    493A  SER*     1.3    81.2    -      -       -      +
    495A  ILE*     1.3    65.3    +      -       -      +
    497A  LEU*     3.1     6.2    +      -       -      +
    498A  ALA*     2.9    24.3    +      -       -      +
    542A  CYS*     3.7    28.0    -      -       +      -
    546A  CYS*     3.7    20.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 495 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  LEU*     5.1     4.7    -      -       +      -
    109A  LEU*     4.2     7.0    -      -       +      -
    158A  LEU*     3.4    36.3    -      -       +      -
    161A  ILE*     6.5     0.2    -      -       +      -
    491A  THR*     3.0    25.2    +      -       +      +
    492A  LEU*     4.2     7.4    -      -       +      +
    494A  ALA*     1.3    75.0    -      -       -      +
    496A  LEU*     1.3    64.0    +      -       -      +
    498A  ALA*     3.4     3.6    +      -       -      +
    499A  PHE*     2.9    22.0    +      -       -      +
    539A  ASN*     3.7    25.5    -      -       +      +
    542A  CYS*     3.6    22.9    -      -       +      -
    543A  TYR*     3.6    29.4    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    158A  LEU*     5.2     2.9    -      -       +      -
    243A  VAL*     5.7     2.0    -      -       +      +
    246A  MET*     4.2    42.0    -      -       +      +
    247A  THR*     5.1    12.1    -      -       +      +
    250A  TYR*     4.5    31.2    -      -       +      -
    492A  LEU*     2.9    25.1    +      -       +      +
    493A  SER*     3.5     3.4    -      -       -      +
    495A  ILE*     1.3    77.8    -      -       -      +
    497A  LEU*     1.3    66.8    +      -       +      +
    499A  PHE*     3.0    12.2    +      -       +      +
    500A  ILE*     2.9    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 497 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    493A  SER*     2.9    24.8    +      -       -      +
    494A  ALA*     3.5     5.8    -      -       -      +
    496A  LEU*     1.3    79.0    -      -       +      +
    498A  ALA*     1.3    64.9    +      -       -      +
    500A  ILE*     3.2    15.6    -      -       +      +
    501A  ILE*     2.9    33.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 498 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    494A  ALA      2.9    16.3    +      -       -      +
    495A  ILE      3.6     3.8    -      -       -      +
    497A  LEU*     1.3    75.0    -      -       -      +
    499A  PHE*     1.3    65.6    +      -       -      +
    501A  ILE*     3.1    10.1    -      -       -      +
    502A  THR*     3.0    29.6    +      -       +      +
    535A  ASN*     3.9    10.3    -      -       -      +
    538A  VAL*     4.2    27.4    -      -       +      -
    539A  ASN*     4.5     4.7    -      -       -      +
    542A  CYS*     4.3     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 499 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  SER*     5.5     2.9    -      -       -      -
    155A  VAL*     3.8    22.4    -      -       +      -
    158A  LEU*     3.8    26.2    -      -       +      -
    239A  PHE*     3.9    12.1    -      +       -      -
    243A  VAL*     3.4    27.1    -      -       +      -
    246A  MET*     3.8    14.8    -      -       +      -
    495A  ILE*     2.9    14.0    +      -       +      +
    496A  LEU*     3.3    11.7    -      -       +      +
    498A  ALA*     1.3    77.6    -      -       -      +
    500A  ILE*     1.3    76.9    +      -       +      +
    502A  THR*     3.1     2.4    +      -       -      -
    503A  TRP*     2.9    78.8    +      +       -      +
    535A  ASN*     3.3    19.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 500 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239A  PHE*     5.0     1.3    -      -       +      -
    243A  VAL*     3.7    28.5    -      -       +      -
    247A  THR*     5.1     6.3    -      -       -      +
    496A  LEU*     2.9    27.6    +      -       +      +
    497A  LEU*     3.2    28.9    -      -       +      +
    499A  PHE*     1.3    82.2    -      -       +      +
    501A  ILE*     1.3    71.9    +      -       +      +
    503A  TRP*     4.9     0.7    -      -       -      -
    504A  THR*     2.6    58.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 501 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    497A  LEU*     2.9    28.3    +      -       +      +
    498A  ALA*     3.1    16.4    -      -       -      +
    500A  ILE*     1.3    85.3    -      -       +      +
    502A  THR*     1.3    64.0    +      -       +      +
    504A  THR*     4.0     4.9    -      -       -      -
    505A  PRO*     3.3    21.3    -      -       +      +
    531A  LEU*     4.7     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 502 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    498A  ALA*     3.0    24.3    +      -       +      +
    499A  PHE      3.2     0.2    +      -       -      -
    501A  ILE*     1.3    83.8    -      -       +      +
    503A  TRP*     1.3    66.9    +      -       -      +
    505A  PRO*     4.0     3.9    -      -       -      +
    506A  TYR*     5.2     0.2    -      -       -      +
    528A  GLY      4.2     0.2    -      -       -      +
    531A  LEU*     3.2    38.8    -      -       +      +
    532A  CYS*     3.4    12.0    +      -       -      -
    534A  ILE*     3.6    30.3    -      -       +      +
    535A  ASN*     3.0    29.3    -      -       -      +
    538A  VAL*     5.6     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 503 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  ILE*     6.4     0.4    -      -       +      -
    151A  SER*     3.7    31.2    -      -       -      -
    154A  SER*     5.0     4.9    -      -       -      -
    155A  VAL*     3.5    29.4    -      -       +      -
    239A  PHE*     3.3    25.4    -      +       +      -
    499A  PHE*     2.9    43.2    +      +       +      +
    502A  THR*     1.3    94.9    -      -       -      +
    504A  THR*     1.3    55.5    +      -       -      +
    505A  PRO*     3.2     3.1    -      -       -      -
    506A  TYR*     2.7    31.7    +      -       -      +
    507A  ASN*     3.0    12.3    +      -       -      +
    532A  CYS*     3.6    28.3    +      -       -      -
    535A  ASN*     3.7    14.9    -      -       -      +
   2000A  0HK      3.1    53.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 504 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239A  PHE*     3.3    31.2    -      -       +      -
    240A  TYR*     5.6     2.7    -      -       +      -
    243A  VAL*     5.7     0.7    -      -       +      -
    500A  ILE*     2.6    44.7    +      -       +      +
    501A  ILE*     4.0     3.5    -      -       -      -
    503A  TRP*     1.3    68.5    -      -       -      +
    505A  PRO*     1.3    74.7    -      -       -      +
    507A  ASN*     4.2     2.5    -      -       -      +
    508A  ILE*     2.8    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 505 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501A  ILE*     3.3    23.6    -      -       +      +
    502A  THR      4.6     0.7    -      -       -      +
    503A  TRP      3.3     5.6    -      -       -      +
    504A  THR*     1.3    98.8    -      -       -      +
    506A  TYR*     1.3    57.3    +      -       +      +
    508A  ILE*     3.7     6.9    -      -       +      +
    509A  MET*     2.9    30.9    +      -       +      +
    528A  GLY*     5.3     4.0    -      -       -      -
    531A  LEU*     3.8    26.0    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    148A  TYR*     4.3     3.3    +      -       -      -
    502A  THR      5.2     0.2    -      -       -      +
    503A  TRP      2.7    15.2    +      -       -      +
    505A  PRO*     1.3    73.6    -      -       -      +
    507A  ASN*     1.3    64.7    +      -       -      +
    509A  MET*     3.1    19.2    +      -       +      +
    510A  VAL*     2.9    46.4    +      -       +      +
    525A  TRP*     4.1    22.0    -      +       +      -
    528A  GLY*     3.9     6.5    -      -       -      +
    529A  TYR*     3.5    49.9    -      +       -      -
    532A  CYS*     3.9    18.6    -      -       -      -
   2000A  0HK      3.6    46.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 507 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235A  ALA*     3.6    13.9    -      -       -      +
    239A  PHE*     3.1    56.5    -      -       +      +
    240A  TYR*     2.6    32.5    +      -       +      +
    503A  TRP*     3.0    15.0    +      -       -      +
    504A  THR      3.4     3.8    +      -       -      +
    506A  TYR*     1.3    80.7    -      -       -      +
    508A  ILE*     1.3    55.1    +      -       -      +
    510A  VAL*     3.3     6.9    +      -       -      +
    511A  LEU*     2.9    22.7    +      -       -      +
   2000A  0HK      3.3    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 508 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240A  TYR*     3.6    12.1    -      -       +      +
    504A  THR*     2.8    36.0    +      -       +      +
    505A  PRO*     3.7     6.3    -      -       +      +
    507A  ASN*     1.3    73.9    -      -       -      +
    509A  MET*     1.3    61.3    +      -       -      +
    511A  LEU*     3.7    13.6    -      -       +      +
    512A  VAL*     2.8    45.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 509 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    505A  PRO      2.9    15.0    +      -       -      +
    506A  TYR*     3.3    26.9    -      -       +      +
    508A  ILE*     1.3    78.4    -      -       -      +
    510A  VAL*     1.3    55.3    +      -       -      +
    512A  VAL*     3.5     8.5    -      -       -      +
    513A  ASN*     2.9    27.2    +      -       -      +
    520A  ILE*     3.8    26.9    -      -       +      +
    524A  TYR*     3.3    50.0    -      -       -      +
    525A  TRP*     3.7    25.5    -      -       +      -
    528A  GLY*     4.2     6.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 510 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228A  PRO*     4.9     1.8    -      -       -      +
    231A  THR*     3.6    33.4    -      -       +      +
    232A  PHE*     4.2    17.0    -      -       +      +
    235A  ALA*     4.4     9.4    -      -       +      -
    506A  TYR*     2.9    46.2    +      -       +      +
    507A  ASN*     3.4     9.4    -      -       -      +
    508A  ILE      3.2     0.2    -      -       -      -
    509A  MET*     1.3    72.2    -      -       -      +
    511A  LEU*     1.3    67.6    +      -       -      +
    512A  VAL      3.0     1.3    -      -       -      -
    513A  ASN*     3.0     3.9    +      -       -      +
    514A  THR*     2.9    24.2    +      -       -      +
    525A  TRP*     3.8    17.7    -      -       +      -
   2000A  0HK      5.0     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 511 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232A  PHE*     3.6    42.3    -      -       +      -
    240A  TYR*     4.0    14.8    -      -       +      +
    507A  ASN      2.9    16.7    +      -       -      +
    508A  ILE*     3.7    16.4    -      -       +      +
    510A  VAL*     1.3    74.8    -      -       -      +
    512A  VAL*     1.3    66.7    +      -       +      +
    514A  THR*     3.1    17.8    -      -       -      -
    515A  PHE*     3.8    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 512 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    508A  ILE*     2.8    39.2    +      -       +      +
    509A  MET*     3.5     7.9    -      -       -      +
    511A  LEU*     1.3    76.3    -      -       +      +
    513A  ASN*     1.3    58.1    +      -       -      +
    514A  THR      2.9     4.5    -      -       -      -
    515A  PHE*     2.8    25.5    +      -       -      +
    516A  CYS*     3.4    25.8    +      -       -      -
    519A  CYS*     5.3     0.7    -      -       +      -
    520A  ILE*     4.2    18.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 513 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228A  PRO*     3.3    24.6    -      -       -      +
    509A  MET      2.9    18.8    +      -       -      +
    510A  VAL*     3.0     5.6    +      -       +      +
    512A  VAL*     1.3    76.7    -      -       -      +
    514A  THR*     1.3    63.5    +      -       -      +
    515A  PHE      3.2     0.6    +      -       -      -
    516A  CYS      3.5    19.0    +      -       -      +
    517A  ASP*     3.7    23.0    +      -       -      +
    520A  ILE*     4.5    11.8    +      -       +      +
    525A  TRP*     3.7    31.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 514 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228A  PRO*     3.5    20.7    +      -       -      +
    229A  THR*     4.6    19.1    -      -       +      +
    232A  PHE*     3.2    40.7    -      -       +      +
    510A  VAL      2.9    15.8    +      -       -      -
    511A  LEU      3.1    13.7    +      -       -      -
    513A  ASN*     1.3    80.0    +      -       -      +
    515A  PHE*     1.3    80.3    +      -       +      +
    516A  CYS      5.4     0.2    -      -       -      -
    517A  ASP*     5.6     0.7    -      -       -      +
    248B  ILE*     4.9     8.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 515 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232A  PHE*     5.5     1.6    -      +       -      -
    511A  LEU*     3.8    23.6    -      -       +      -
    512A  VAL*     2.8    14.4    +      -       -      +
    514A  THR*     1.3    93.7    -      -       +      +
    516A  CYS*     1.3    59.1    +      -       -      +
    517A  ASP*     4.4     4.1    -      -       -      +
    248B  ILE*     4.0    37.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 516 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    512A  VAL*     3.4    18.9    +      -       -      -
    513A  ASN*     3.5    15.6    +      -       -      +
    515A  PHE*     1.3    80.6    -      -       -      +
    517A  ASP*     1.3    64.6    +      -       -      +
    518A  SER      3.5     0.4    -      -       -      +
    519A  CYS*     2.0    68.7    -      -       +      +
----------------------------------------------------------
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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