Contacts of the helix formed by residues 521 - 547 (chain C) 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 PRO 521 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    518C  SER      5.5     1.8    -      -       -      +
    519C  CYS      3.4     9.2    -      -       -      +
    520C  ILE*     1.3    86.7    -      -       -      +
    522C  LYS*     1.3    65.8    +      -       -      +
    523C  THR*     3.1    16.2    +      -       -      +
    524C  TYR*     3.2    47.4    +      -       +      -
    525C  TRP*     3.3    14.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 522 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    520C  ILE      4.1     0.4    +      -       -      -
    521C  PRO*     1.3    72.2    -      -       -      +
    523C  THR*     1.3    62.2    +      -       -      +
    525C  TRP*     3.4    11.5    +      -       -      +
    526C  ASN*     2.6    41.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 523 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    521C  PRO*     4.4     9.5    -      -       -      +
    522C  LYS*     1.3    81.9    -      -       -      +
    524C  TYR*     1.3    83.6    +      -       +      +
    526C  ASN*     3.1     6.1    +      -       -      +
    527C  LEU*     2.9    24.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 524 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    509C  MET*     3.5    22.9    -      -       -      +
    519C  CYS      5.0     2.9    -      -       -      -
    520C  ILE*     4.1     8.7    -      -       +      -
    521C  PRO*     3.2    38.3    +      -       +      +
    523C  THR*     1.3    95.7    -      -       +      +
    525C  TRP*     1.3    62.9    +      -       -      +
    527C  LEU*     3.4     7.1    +      -       +      +
    528C  GLY*     2.9    19.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 525 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    231C  THR*     6.1     2.5    -      -       +      -
    506C  TYR*     4.0    31.2    -      +       +      -
    509C  MET*     3.5    47.3    -      -       +      +
    510C  VAL*     4.2    14.8    -      -       +      -
    513C  ASN*     3.6    35.9    -      -       +      -
    520C  ILE*     3.1    32.4    +      -       +      +
    521C  PRO      3.3    23.6    +      -       -      -
    522C  LYS*     3.6    10.1    -      -       -      +
    523C  THR      3.2     0.4    -      -       -      -
    524C  TYR*     1.3    75.9    -      -       -      +
    526C  ASN*     1.3    67.6    +      -       -      +
    528C  GLY*     3.0     4.7    +      -       -      -
    529C  TYR*     2.9    23.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 526 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  PHE*     3.5    26.0    -      -       +      -
    127C  TYR*     5.7     4.9    -      -       -      -
    128C  ILE*     5.8     4.6    -      -       -      +
    522C  LYS*     2.6    39.2    +      -       -      +
    523C  THR*     3.6     5.2    +      -       -      +
    525C  TRP*     1.3    80.1    -      -       -      +
    527C  LEU*     1.3    58.2    +      -       -      +
    529C  TYR*     3.0    12.2    -      -       -      +
    530C  TRP*     2.9    34.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 527 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    523C  THR*     2.9    19.2    +      -       +      +
    524C  TYR*     3.7     9.0    -      -       +      +
    526C  ASN*     1.3    73.6    -      -       -      +
    528C  GLY*     1.3    66.6    +      -       -      +
    530C  TRP*     2.8    21.5    +      -       -      +
    531C  LEU*     2.9    20.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 528 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    505C  PRO*     5.6     1.1    -      -       -      -
    506C  TYR*     3.9    21.7    -      -       -      +
    509C  MET*     4.4     5.6    -      -       -      -
    524C  TYR      2.9    14.8    +      -       -      -
    525C  TRP      3.5     3.6    -      -       -      -
    527C  LEU*     1.3    74.3    -      -       -      +
    529C  TYR*     1.3    61.9    +      -       -      +
    531C  LEU*     3.2    16.9    +      -       -      +
    532C  CYS*     3.0    27.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 529 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  PHE*     4.2    29.2    -      +       +      -
    143C  TRP*     5.2     4.7    -      +       -      -
    144C  LEU*     4.9     6.9    -      -       -      +
    147C  ASP*     4.0     5.2    +      -       -      -
    148C  TYR*     3.7    20.6    +      -       -      -
    506C  TYR*     3.8    27.6    -      +       -      -
    525C  TRP*     2.9    11.2    +      -       +      +
    526C  ASN*     3.0    15.9    -      -       -      +
    528C  GLY*     1.3    76.1    -      -       -      +
    530C  TRP*     1.3    57.0    +      -       -      +
    532C  CYS*     3.2     9.7    +      -       -      +
    533C  TYR*     3.0    67.0    +      +       -      -
   2000C  0HK      3.7    41.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 530 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74C  THR*     3.8    22.4    -      -       -      -
     77C  LEU*     4.5    12.3    -      -       +      -
    121C  MET*     3.6    31.9    -      -       +      -
    124C  PHE*     3.4    28.1    -      +       -      -
    125C  THR*     3.1    30.7    -      -       +      -
    526C  ASN*     2.9    26.9    +      -       +      +
    527C  LEU*     2.8    13.2    +      -       -      +
    529C  TYR*     1.3    77.2    -      -       -      +
    531C  LEU*     1.3    55.9    +      -       +      +
    533C  TYR*     3.0    42.5    +      +       +      +
    534C  ILE*     2.8    33.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 531 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501C  ILE      5.7     0.2    -      -       -      +
    502C  THR*     3.1    25.3    -      -       -      +
    505C  PRO*     4.3    23.8    -      -       +      -
    527C  LEU*     2.9    20.5    +      -       +      +
    528C  GLY*     3.2    12.1    +      -       -      +
    530C  TRP*     1.3    69.9    -      -       +      +
    532C  CYS*     1.3    60.2    +      -       -      +
    533C  TYR      2.9     4.3    -      -       -      -
    534C  ILE*     2.9    54.3    +      -       +      +
    535C  ASN      2.9     5.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 532 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116C  ILE*     4.8     3.5    -      -       -      +
    503C  TRP*     3.1    64.1    +      -       +      +
    506C  TYR*     3.8    20.4    -      -       -      -
    528C  GLY      3.0    17.9    +      -       -      +
    529C  TYR      3.4     9.2    -      -       -      +
    531C  LEU*     1.3    75.7    -      -       -      +
    533C  TYR*     1.3    63.5    +      -       -      +
    535C  ASN*     3.7     4.4    -      -       -      +
    536C  SER*     4.3     5.9    +      -       -      -
   2000C  0HK      3.6    28.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 533 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LEU*     5.3     0.4    -      -       +      -
     81C  THR*     5.8     0.2    -      -       -      +
    116C  ILE*     3.6    30.1    -      -       +      -
    120C  SER*     3.6    13.7    +      -       -      -
    121C  MET*     3.9    32.4    -      -       +      +
    124C  PHE*     4.2    18.7    -      +       -      +
    143C  TRP*     4.6     0.3    -      -       -      -
    147C  ASP*     2.7    24.6    +      -       -      -
    529C  TYR*     3.0    36.7    +      +       -      -
    530C  TRP*     3.0    48.2    +      +       +      +
    531C  LEU      2.9     0.8    -      -       -      -
    532C  CYS*     1.3    78.3    -      -       -      +
    534C  ILE*     1.3    54.9    +      -       +      +
    535C  ASN      3.0     4.7    -      -       -      -
    536C  SER*     3.0    10.2    +      -       -      -
    537C  THR*     3.0    26.0    +      -       -      -
   2000C  0HK      4.0     7.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 534 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LEU*     3.6    26.7    -      -       +      -
    502C  THR*     3.9    18.6    -      -       +      -
    530C  TRP*     2.8    25.4    +      -       +      +
    531C  LEU*     2.9    44.7    +      -       +      +
    533C  TYR*     1.3    68.5    -      -       -      +
    535C  ASN*     1.3    60.0    +      -       -      +
    537C  THR*     3.6    11.9    -      -       -      -
    538C  VAL*     2.9    42.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 535 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154C  SER*     5.3     3.3    +      -       -      -
    498C  ALA*     3.5     3.1    -      -       -      +
    499C  PHE*     2.9    46.2    -      -       -      +
    502C  THR*     2.9    22.9    +      -       -      +
    503C  TRP*     3.5    28.9    +      -       +      +
    531C  LEU      2.9     5.5    +      -       -      -
    532C  CYS      3.7     2.7    -      -       -      +
    534C  ILE*     1.3    78.3    -      -       -      +
    536C  SER*     1.3    66.4    +      -       -      +
    538C  VAL*     3.0     6.7    +      -       -      +
    539C  ASN*     3.0    43.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 536 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81C  THR*     4.0     7.4    -      -       -      +
    113C  ASP*     2.7    43.2    +      -       -      +
    116C  ILE*     4.0    26.9    -      -       -      +
    154C  SER*     5.0     3.6    +      -       -      -
    503C  TRP*     5.7     2.1    +      -       -      -
    532C  CYS      4.5     2.8    +      -       -      -
    533C  TYR      3.0     9.6    +      -       -      -
    535C  ASN*     1.3    82.7    +      -       -      +
    537C  THR*     1.3    65.0    +      -       -      +
    539C  ASN*     3.9     5.4    -      -       -      +
    540C  PRO*     3.4    16.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 537 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77C  LEU*     3.5    36.8    -      -       +      +
     80C  VAL*     4.2    17.6    -      -       +      +
     81C  THR*     2.7    31.8    +      -       -      +
    121C  MET*     4.5     3.3    -      -       -      +
    533C  TYR      3.0    14.1    +      -       -      -
    534C  ILE*     3.6    16.9    -      -       -      -
    536C  SER*     1.3    78.7    -      -       -      +
    538C  VAL*     1.3    61.3    +      -       +      +
    540C  PRO*     3.3    16.8    -      -       -      +
    541C  VAL*     4.3     8.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 538 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    498C  ALA*     4.5    11.7    -      -       +      -
    502C  THR*     5.4     4.9    -      -       +      -
    534C  ILE*     2.9    34.8    +      -       +      +
    535C  ASN*     3.0     5.4    +      -       -      +
    537C  THR*     1.3    79.6    -      -       +      +
    539C  ASN*     1.3    66.7    +      -       -      +
    540C  PRO      3.4     0.2    -      -       -      -
    541C  VAL*     3.0    16.0    +      -       +      +
    542C  CYS*     2.9    34.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 539 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109C  LEU*     5.1     7.5    -      -       -      +
    113C  ASP*     3.2    32.8    +      -       -      +
    154C  SER*     5.0     5.1    +      -       -      -
    158C  LEU*     6.0     0.6    -      -       -      +
    495C  ILE*     3.5    33.2    -      -       +      +
    498C  ALA*     4.9     1.6    -      -       -      +
    535C  ASN*     3.0    35.9    +      -       -      +
    536C  SER*     3.9     3.9    -      -       -      +
    538C  VAL*     1.3    75.0    -      -       -      +
    540C  PRO*     1.3    71.5    -      -       +      +
    542C  CYS*     2.9    11.9    +      -       -      +
    543C  TYR*     2.9    33.8    +      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 540 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81C  THR*     4.7     3.1    -      -       -      +
     84C  GLY*     4.1    21.5    -      -       -      +
     85C  ASN*     3.1    31.9    -      -       -      +
     88C  VAL*     4.2     7.4    -      -       +      +
    536C  SER      3.4     8.1    -      -       -      +
    537C  THR*     3.3    18.4    -      -       -      +
    538C  VAL      3.5     0.4    -      -       -      -
    539C  ASN*     1.3    94.5    -      -       +      +
    541C  VAL*     1.3    57.8    +      -       +      +
    543C  TYR*     2.9    37.8    -      -       +      +
    544C  ALA*     3.0    10.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 541 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80C  VAL*     5.7     8.1    -      -       +      -
    537C  THR      4.3    11.4    -      -       -      +
    538C  VAL*     3.0    17.8    +      -       +      +
    540C  PRO*     1.3    74.8    -      -       +      +
    542C  CYS*     1.3    66.9    +      -       -      +
    544C  ALA*     3.2     9.8    +      -       +      +
    545C  LEU*     2.9    23.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 542 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    491C  THR*     5.4     0.4    -      -       -      -
    494C  ALA*     4.2    16.8    -      -       +      -
    495C  ILE*     3.2    27.1    -      -       +      -
    498C  ALA*     4.1    15.9    -      -       -      -
    538C  VAL*     2.9    46.3    +      -       -      -
    539C  ASN*     3.1     7.0    -      -       -      +
    541C  VAL*     1.3    72.0    -      -       -      +
    543C  TYR*     1.3    70.0    +      -       -      +
    545C  LEU*     2.8    19.7    +      -       -      +
    546C  CYS*     2.9    17.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 543 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88C  VAL*     3.8    36.3    -      -       +      -
    106C  LEU*     2.7    62.8    +      -       +      -
    109C  LEU*     3.1    22.6    -      -       +      +
    110C  ALA*     4.4     5.4    -      -       +      -
    113C  ASP*     5.0     0.4    +      -       -      -
    491C  THR*     4.4    12.1    +      -       +      -
    495C  ILE*     3.9    21.5    -      -       +      -
    539C  ASN*     2.9    17.8    +      -       +      +
    540C  PRO*     2.9    16.4    -      -       +      +
    542C  CYS*     1.3    78.0    -      -       -      +
    544C  ALA*     1.3    64.0    +      -       -      +
    545C  LEU      3.0     0.3    +      -       -      -
    546C  CYS*     3.2     8.1    +      -       -      +
    547C  ASN*     3.2    17.5    +      -       -      +
    550C  PHE*     4.5    11.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 544 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    540C  PRO      3.0     8.4    +      -       -      +
    541C  VAL*     3.2    13.0    +      -       +      +
    543C  TYR*     1.3    79.5    -      -       -      +
    545C  LEU*     1.3    60.8    +      -       -      +
    547C  ASN      3.9     9.9    -      -       -      +
    548C  LYS*     4.8     0.7    +      -       -      -
    550C  PHE*     4.6    13.2    -      -       +      +
    551C  ARG*     4.1    21.3    -      -       +      +
    554C  PHE*     6.0     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 545 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    494C  ALA*     5.6     8.3    -      -       +      -
    541C  VAL*     2.9    13.9    +      -       +      +
    542C  CYS*     2.8    15.0    +      -       -      +
    544C  ALA*     1.3    79.6    -      -       -      +
    546C  CYS*     1.3    65.6    +      -       -      +
    547C  ASN      5.0     0.5    -      -       -      -
    548C  LYS*     5.1     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS 546 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    490C  GLN*     5.2     1.4    -      -       +      +
    491C  THR*     3.1    51.4    -      -       +      +
    493C  SER*     6.2     1.1    -      -       -      -
    494C  ALA*     3.6    23.6    -      -       -      -
    542C  CYS      2.9    11.0    +      -       -      +
    543C  TYR      4.3     0.7    -      -       -      +
    545C  LEU*     1.3    84.2    -      -       -      +
    547C  ASN*     1.3    64.6    +      -       -      +
    548C  LYS      4.0     2.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 547 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103C  ASN*     4.4    12.7    +      -       -      +
    106C  LEU*     5.6     2.6    -      -       -      +
    490C  GLN*     2.9    43.4    +      -       -      +
    491C  THR*     3.4     5.6    +      -       -      +
    543C  TYR      3.2    10.9    +      -       -      +
    544C  ALA      3.9     4.4    -      -       -      +
    546C  CYS*     1.3    83.5    -      -       -      +
    548C  LYS*     1.3    63.3    +      -       -      +
    549C  THR*     2.9    16.3    +      -       -      +
    550C  PHE*     3.0    21.3    +      -       +      +
    551C  ARG      3.5     4.9    +      -       -      -
----------------------------------------------------------
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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