Contacts of the helix formed by residues 535 - 558 (chain A) in PDB entry 2O2C


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 535 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  ASP*     4.0    15.7    +      -       -      +
     97A  ASN*     3.1    17.5    +      -       -      -
    219A  LEU*     3.8     5.7    -      -       -      +
    222A  PHE*     3.9    14.1    -      -       +      -
    348A  GLU*     6.0     0.2    -      -       -      -
    466A  GLN*     4.8     2.0    -      -       -      +
    533A  SER*     3.1    24.5    +      -       -      +
    534A  LEU*     1.3    76.3    -      -       -      +
    536A  PRO*     1.4    76.2    -      -       +      +
    537A  ARG*     3.7     8.1    +      -       -      +
    538A  ALA*     3.0    19.6    +      -       -      +
    539A  LEU*     3.0     9.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 536 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  LEU*     3.7    28.9    -      -       +      -
    222A  PHE*     3.9    30.1    -      -       +      -
    341A  ILE*     4.7     0.2    -      -       +      -
    345A  ASN*     3.3    46.4    -      -       +      +
    348A  GLU*     3.9     7.6    -      -       +      -
    349A  LEU*     3.4    17.1    -      -       -      +
    535A  THR*     1.4    85.3    -      -       -      +
    537A  ARG*     1.3    61.4    +      -       -      +
    539A  LEU      3.3     1.0    +      -       -      -
    540A  GLY      3.1    18.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 537 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  LEU*     2.8    48.1    +      -       +      -
     92A  GLY*     3.6    15.6    +      -       -      -
     93A  SER*     3.7    27.1    -      -       -      +
     97A  ASN*     5.6     0.4    -      -       -      +
    348A  GLU*     2.9    60.2    +      -       -      +
    351A  THR*     3.7    28.0    -      -       -      +
    352A  GLY*     3.3    26.7    -      -       -      +
    355A  VAL*     4.4     1.8    -      -       -      +
    535A  THR*     3.1     8.4    +      -       -      +
    536A  PRO*     1.3    78.2    -      -       -      +
    538A  ALA*     1.3    62.1    +      -       -      +
    540A  GLY      3.4     0.3    +      -       -      -
    541A  ALA*     3.1    20.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 538 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  LEU*     3.8    14.1    -      -       +      +
     97A  ASN*     3.7     7.9    -      -       -      +
    531A  ILE*     4.0    17.8    -      -       +      +
    533A  SER      3.3    26.7    -      -       -      +
    534A  LEU*     4.1     0.7    -      -       -      -
    535A  THR*     3.0    18.6    +      -       -      +
    537A  ARG*     1.3    74.3    -      -       -      +
    539A  LEU*     1.3    65.1    +      -       -      +
    541A  ALA*     3.3     4.0    +      -       -      +
    542A  ILE*     3.1    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 539 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  MET*     3.9    16.2    -      -       +      -
    215A  ALA*     4.0    17.0    -      -       +      -
    218A  ALA*     3.9    17.0    -      -       +      -
    219A  LEU*     3.8    29.6    -      -       +      -
    329A  MET*     4.9     0.4    -      -       +      -
    349A  LEU*     4.0    10.3    -      -       +      -
    398A  LEU*     3.8    29.4    -      -       +      -
    401A  LEU*     5.2     0.4    -      -       +      -
    534A  LEU*     4.1    10.0    -      -       +      +
    535A  THR      3.0    12.2    +      -       -      +
    536A  PRO      3.7     7.6    -      -       -      +
    538A  ALA*     1.3    76.0    -      -       -      +
    540A  GLY*     1.3    63.8    +      -       -      +
    542A  ILE*     3.2     9.2    +      -       +      +
    543A  ILE*     3.0    40.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 540 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330A  TRP*     3.6    11.4    -      -       -      -
    349A  LEU*     3.4    32.4    -      -       -      +
    353A  ALA*     3.5    10.6    -      -       -      -
    536A  PRO      3.1    11.5    +      -       -      -
    537A  ARG      3.4     2.2    +      -       -      -
    538A  ALA      3.3     0.2    -      -       -      -
    539A  LEU*     1.3    75.0    -      -       -      +
    541A  ALA*     1.3    61.6    +      -       -      +
    543A  ILE      3.6     0.3    +      -       -      -
    544A  ALA*     3.1    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 541 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91A  LEU*     3.6    28.9    -      -       +      -
     99A  LEU*     4.2    10.1    -      -       +      -
    352A  GLY      3.5    12.0    -      -       -      +
    356A  ILE*     3.6    18.4    -      -       +      +
    531A  ILE*     6.5     0.2    -      -       +      -
    537A  ARG      3.1    13.4    +      -       -      +
    538A  ALA*     3.4    10.3    -      -       -      +
    539A  LEU      3.2     0.2    -      -       -      -
    540A  GLY*     1.3    77.7    -      -       -      +
    542A  ILE*     1.3    56.7    +      -       +      +
    545A  MET*     3.0    29.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 542 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  LEU*     4.1    20.2    -      -       +      -
    398A  LEU*     5.0     4.3    -      -       +      -
    401A  LEU*     4.5    17.5    -      -       +      -
    460A  ILE*     4.2    22.9    -      -       +      -
    529A  LEU*     6.2     0.7    -      -       +      -
    531A  ILE*     4.0    27.6    -      -       +      -
    534A  LEU*     4.2    12.6    -      -       +      -
    538A  ALA      3.1    15.7    +      -       -      +
    539A  LEU*     3.2    10.3    +      -       +      +
    541A  ALA*     1.3    73.7    -      -       -      +
    543A  ILE*     1.3    69.8    +      -       +      +
    545A  MET*     3.3    11.9    +      -       +      +
    546A  TYR*     3.2    44.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 543 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214A  MET*     3.8    24.0    -      -       +      -
    329A  MET*     4.1     5.4    -      -       +      -
    330A  TRP*     3.6    25.6    -      -       +      -
    401A  LEU*     3.5    32.3    -      -       +      -
    404A  TYR*     3.6    31.4    -      -       +      +
    405A  LEU*     4.9     3.1    -      -       +      -
    408A  LEU*     5.0     1.8    -      -       +      -
    539A  LEU*     3.0    26.2    +      -       +      +
    542A  ILE*     1.3    75.7    -      -       +      +
    544A  ALA*     1.3    61.3    +      -       -      +
    546A  TYR*     3.2     7.5    +      -       +      +
    547A  GLU*     2.9    38.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 544 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  ARG*     3.8    13.7    -      -       -      +
    330A  TRP*     4.4     0.8    -      -       -      -
    353A  ALA*     3.8    28.0    -      -       +      +
    356A  ILE*     4.1     7.0    -      -       +      -
    357A  ASP*     4.0     3.1    -      -       -      +
    540A  GLY      3.1    19.4    +      -       -      +
    541A  ALA      3.9     3.1    -      -       -      +
    543A  ILE*     1.3    76.0    -      -       -      +
    545A  MET*     1.3    57.2    +      -       -      +
    547A  GLU*     3.2    12.4    +      -       -      +
    548A  HIS*     3.0    37.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 545 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  LEU*     3.9    14.6    -      -       +      -
    356A  ILE*     3.8    10.9    -      -       +      +
    369A  VAL*     3.6    28.7    -      -       +      -
    370A  PRO*     3.7    15.9    -      -       +      +
    373A  LEU*     3.9    20.6    -      -       +      -
    529A  LEU*     3.3    35.9    -      -       +      -
    541A  ALA      3.0    14.7    +      -       -      +
    542A  ILE*     3.4    14.6    -      -       +      +
    544A  ALA*     1.3    75.2    -      -       -      +
    546A  TYR*     1.3    90.3    +      -       +      +
    548A  HIS      3.3     1.0    +      -       -      -
    549A  LYS*     2.9    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 546 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  LEU*     4.2    10.5    -      -       +      -
    391A  ILE*     3.7    12.1    -      -       +      +
    405A  LEU*     3.8    45.1    -      -       +      -
    408A  LEU*     4.0     4.7    -      -       +      -
    458A  ASP*     2.7    41.3    +      -       -      +
    460A  ILE*     3.6    19.2    -      -       +      +
    529A  LEU*     3.5     8.9    -      -       +      +
    542A  ILE*     3.2    27.0    +      -       +      -
    543A  ILE*     3.2     8.3    +      -       -      +
    545A  MET*     1.3    96.9    -      -       +      +
    547A  GLU*     1.3    64.4    +      -       -      +
    549A  LYS*     3.3    23.0    +      -       +      +
    550A  VAL*     3.1    31.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 547 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148A  HIS*     3.5     6.4    +      -       -      +
    152A  ARG*     2.8    34.2    +      -       -      -
    326A  ARG      4.6     0.2    -      -       -      +
    327A  TYR*     3.7    44.0    +      -       +      -
    330A  TRP*     2.9    31.4    +      -       -      -
    404A  TYR*     4.4     2.9    +      -       -      -
    408A  LEU*     3.9    17.9    -      -       +      +
    543A  ILE*     2.9    23.5    +      -       +      +
    544A  ALA*     3.5     7.3    -      -       -      +
    546A  TYR*     1.3    75.3    -      -       -      +
    548A  HIS*     1.3    63.7    +      -       -      +
    550A  VAL*     3.5     4.9    +      -       -      +
    551A  LEU*     3.1    23.7    +      -       -      +
    562A  TYR*     5.0     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 548 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  PHE*     4.0    11.6    -      +       -      -
    148A  HIS*     4.6     7.3    +      -       -      -
    149A  ILE*     3.8    14.6    -      -       +      -
    152A  ARG*     3.8    13.0    +      -       -      -
    356A  ILE*     4.2     9.2    -      -       +      -
    357A  ASP*     2.7    33.6    +      -       -      -
    360A  PHE*     3.5    38.2    -      +       +      -
    370A  PRO*     3.6    20.2    -      -       +      -
    544A  ALA      3.0    21.8    +      -       -      +
    547A  GLU*     1.3    78.7    -      -       -      +
    549A  LYS*     1.3    62.4    +      -       -      +
    551A  LEU*     3.3    13.5    +      -       +      +
    552A  VAL*     3.1    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 549 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  PRO*     3.8    15.5    -      -       -      +
    373A  LEU*     3.9    32.2    +      -       +      +
    374A  ALA*     3.5    22.5    -      -       -      +
    377A  GLY*     5.1     2.4    -      -       -      -
    389A  HIS*     3.6    36.8    +      -       -      -
    409A  ASP*     4.5    13.4    +      -       -      +
    458A  ASP*     4.5     4.2    +      -       -      -
    545A  MET      2.9    17.9    +      -       -      +
    546A  TYR*     3.3    21.4    +      -       +      +
    548A  HIS*     1.3    75.1    -      -       -      +
    550A  VAL*     1.3    59.1    +      -       +      +
    552A  VAL      3.3     1.6    +      -       -      -
    553A  GLN*     3.0    55.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 550 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327A  TYR*     3.7    13.5    -      -       -      +
    408A  LEU*     4.0    10.1    -      -       +      +
    409A  ASP*     4.0    33.9    -      -       +      +
    412A  SER*     3.5    26.9    -      -       -      +
    413A  ASN*     3.1    25.1    +      -       -      +
    546A  TYR*     3.1    18.9    +      -       +      +
    547A  GLU*     3.6     6.1    -      -       -      +
    549A  LYS*     1.3    77.7    -      -       +      +
    551A  LEU*     1.3    63.4    +      -       -      +
    553A  GLN*     4.7     3.1    -      -       -      +
    554A  GLY*     3.0    20.1    +      -       -      -
    561A  SER*     3.8     4.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 551 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  ILE*     5.4     1.1    -      -       +      -
    128A  PHE*     3.7    29.8    -      -       +      -
    129A  VAL*     3.9    20.9    -      -       +      -
    132A  VAL*     4.1    25.1    -      -       +      -
    133A  PHE*     5.1     2.7    -      -       +      -
    148A  HIS*     5.6     3.8    -      -       -      +
    360A  PHE*     4.1    19.7    -      -       +      -
    547A  GLU      3.1    12.1    +      -       -      +
    548A  HIS*     3.4    20.4    -      -       +      +
    549A  LYS      3.3     0.4    -      -       -      -
    550A  VAL*     1.3    77.5    -      -       -      +
    552A  VAL*     1.3    62.6    +      -       +      +
    554A  GLY*     3.8     0.7    -      -       -      -
    555A  ALA*     3.0    29.3    +      -       +      +
    561A  SER*     4.7     2.0    +      -       -      -
    562A  TYR*     3.3    27.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 552 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  ILE*     4.1    18.6    -      -       +      -
    360A  PHE*     3.5    28.0    -      -       +      -
    371A  LEU*     3.8    28.5    -      -       +      +
    374A  ALA*     3.6    22.9    -      -       +      -
    375A  LEU*     5.3     0.7    -      -       +      -
    548A  HIS      3.1    15.2    +      -       -      +
    549A  LYS      3.3     0.4    +      -       -      +
    551A  LEU*     1.3    79.1    -      -       +      +
    553A  GLN*     1.3    56.5    +      -       -      +
    555A  ALA*     3.2     6.1    +      -       -      +
    556A  ILE*     2.9    45.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 553 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  ALA*     3.1    31.4    +      -       +      +
    377A  GLY*     3.5    23.6    -      -       -      -
    378A  VAL*     4.1     6.5    -      -       +      -
    381A  ILE*     4.2     8.1    -      -       -      +
    409A  ASP*     4.4    11.3    -      -       -      +
    413A  ASN*     3.9     9.5    +      -       -      +
    430A  PRO*     4.9     1.4    -      -       -      +
    549A  LYS*     3.0    44.7    +      -       -      +
    550A  VAL*     5.0     1.4    -      -       -      -
    552A  VAL*     1.3    74.1    -      -       -      +
    554A  GLY*     1.3    62.9    +      -       -      +
    556A  ILE*     3.3     8.8    +      -       -      +
    557A  TRP*     3.1    58.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 554 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    413A  ASN*     3.7     9.1    -      -       -      +
    419A  ARG*     4.8     0.2    -      -       -      -
    550A  VAL      3.0    11.1    +      -       -      -
    551A  LEU      3.8     0.2    -      -       -      -
    553A  GLN*     1.3    76.4    -      -       -      +
    555A  ALA*     1.3    57.3    +      -       -      +
    557A  TRP      3.5     0.5    +      -       -      -
    558A  GLY      2.9    22.2    +      -       -      -
    559A  ILE*     3.0    27.9    +      -       -      +
    561A  SER*     3.3    24.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 555 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  ARG*     3.8    12.4    +      -       -      +
    125A  ILE*     3.6    24.9    -      -       +      +
    128A  PHE*     3.7    29.1    -      -       +      -
    419A  ARG*     3.7    15.5    +      -       -      +
    551A  LEU      3.0    17.8    +      -       -      +
    552A  VAL*     3.6     1.6    -      -       -      +
    554A  GLY*     1.3    75.0    -      -       -      +
    556A  ILE*     1.3    65.2    +      -       -      +
    558A  GLY*     3.3    10.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 556 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50A  LEU*     3.6    17.2    -      -       +      +
     56A  TRP*     4.4     3.4    -      -       +      -
    119A  LEU*     4.0    25.6    -      -       +      -
    120A  ALA*     5.4     1.8    -      -       -      -
    123A  ARG*     2.9    37.6    +      -       +      +
    125A  ILE*     4.0    15.5    -      -       +      -
    374A  ALA      5.3     0.9    -      -       -      +
    375A  LEU*     3.7    30.1    -      -       +      -
    378A  VAL*     3.9    25.4    -      -       +      -
    552A  VAL*     2.9    33.4    +      -       +      +
    553A  GLN*     3.3     5.6    +      -       -      +
    555A  ALA*     1.3    76.0    -      -       -      +
    557A  TRP*     1.3    63.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 557 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47A  ASP*     4.4     4.7    -      -       -      +
     50A  LEU*     4.0    16.5    -      -       +      +
     56A  TRP*     5.0     0.2    -      +       -      -
    123A  ARG*     3.9     3.5    +      -       -      -
    378A  VAL*     4.3    15.4    -      -       +      +
    381A  ILE*     3.8    25.4    -      -       +      -
    382A  ASN*     2.7    31.0    +      -       -      -
    413A  ASN*     3.9    13.7    -      -       +      -
    418A  THR*     4.1    12.6    -      -       -      +
    424A  VAL*     4.6     3.6    -      -       -      +
    426A  THR*     3.6    18.9    +      -       -      +
    427A  LEU      3.5     7.8    +      -       -      -
    428A  THR*     3.5    42.8    -      -       +      -
    429A  GLY*     3.5    16.4    -      -       -      -
    430A  PRO*     5.2     0.2    -      -       +      -
    553A  GLN*     3.1    45.6    +      -       +      +
    554A  GLY      4.0     3.1    -      -       -      +
    556A  ILE*     1.3    80.7    -      -       +      +
    558A  GLY*     1.3    61.6    +      -       -      +
    559A  ILE*     3.3    17.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 558 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  ARG*     3.6    14.8    -      -       -      -
    418A  THR*     3.4     9.3    -      -       -      -
    419A  ARG*     3.0    41.3    +      -       -      +
    554A  GLY      2.9     7.0    +      -       -      -
    555A  ALA      3.3     5.3    +      -       -      -
    556A  ILE      3.2     4.0    -      -       -      -
    557A  TRP*     1.3    78.7    -      -       -      +
    559A  ILE*     1.3    62.4    +      -       -      +
----------------------------------------------------------
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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