Contacts of the helix formed by residues 436 - 459 (chain C) in PDB entry 1JFZ


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 TYR 436 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    423C  LYS      3.2     8.0    +      -       -      +
    424C  ALA*     3.3    32.8    -      -       -      +
    426C  THR      3.0    23.9    +      -       -      -
    427C  HIS*     3.2    46.3    -      +       +      -
    428C  VAL      5.4     0.4    -      -       -      -
    435C  HIS*     1.3    73.9    -      +       -      +
    437C  GLU*     1.3    62.1    +      -       +      +
    438C  THR      3.1     2.7    -      -       -      -
    439C  LEU*     2.9     9.9    +      -       -      -
    440C  GLU*     2.8    45.3    +      -       +      +
    493C  ILE*     5.3     0.4    -      -       +      -
    504C  ILE*     3.6    19.9    -      -       +      +
    507C  ASP*     3.8    26.3    +      -       +      +
    508C  VAL*     3.4    22.2    -      -       +      -
    511C  ALA*     3.9     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 437 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    428C  VAL*     6.0     0.5    -      -       -      +
    435C  HIS*     3.4    33.0    +      -       +      +
    436C  TYR*     1.3    87.1    -      -       +      +
    438C  THR*     1.3    60.0    +      -       -      +
    440C  GLU*     3.3     6.4    +      -       -      +
    441C  PHE      3.2    10.4    +      -       -      -
    662D  LYS      5.1     0.2    -      -       -      -
    663D  ARG*     3.1    22.5    -      -       -      +
    664D  GLU*     2.7    71.5    +      -       +      +
    665D  GLY      4.5     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 438 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    423C  LYS*     5.7     6.1    -      -       -      -
    435C  HIS      4.6     3.8    +      -       -      -
    436C  TYR      2.9     1.0    +      -       -      -
    437C  GLU*     1.3    75.0    -      -       -      +
    439C  LEU*     1.3    67.3    +      -       +      +
    440C  GLU      3.0     1.6    -      -       -      -
    441C  PHE*     3.2    15.3    +      -       -      +
    442C  LEU*     3.3    12.0    +      -       -      +
    656D  VAL*     3.6    27.4    -      -       +      +
    662D  LYS*     2.3    56.0    +      -       +      +
    663D  ARG*     4.6     0.5    -      -       -      -
    664D  GLU*     4.4     0.2    -      -       -      -
    667D  LEU*     4.5     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 439 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420C  LEU*     4.2    13.9    -      -       +      +
    423C  LYS*     3.3    42.4    -      -       +      +
    424C  ALA*     3.7    21.5    -      -       +      +
    435C  HIS      5.4     0.4    +      -       -      +
    436C  TYR*     2.9     6.8    +      -       -      +
    438C  THR*     1.3    78.3    -      -       +      +
    440C  GLU*     1.3    57.2    +      -       -      +
    442C  LEU*     4.5     2.7    -      -       +      +
    443C  GLY      2.7    25.3    +      -       -      -
    511C  ALA*     3.4    15.5    -      -       +      +
    514C  ALA*     3.0    22.7    -      -       +      +
    515C  ALA*     4.5     9.6    -      -       +      +
    518C  ILE*     3.8    28.5    -      -       +      -
    656D  VAL*     6.1     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 440 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436C  TYR*     2.8    23.1    +      -       +      +
    437C  GLU*     3.4    11.1    -      -       -      +
    438C  THR      3.0     0.4    -      -       -      -
    439C  LEU*     1.3    80.2    -      -       -      +
    441C  PHE*     1.3    55.3    +      -       -      +
    443C  GLY      3.7     0.2    -      -       -      -
    444C  ASP*     2.8    31.5    +      -       +      +
    507C  ASP*     2.7    35.7    -      -       -      +
    510C  GLU*     3.0    14.2    -      -       -      +
    511C  ALA*     3.7     9.8    -      -       +      +
    763C   MN      1.8    35.3    +      -       -      +
    664D  GLU*     3.5    14.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 441 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    437C  GLU      3.2     3.4    +      -       -      -
    438C  THR*     3.4    11.9    -      -       -      +
    440C  GLU*     1.3    78.3    -      -       -      +
    442C  LEU*     1.3    60.4    +      -       -      +
    444C  ASP*     3.5    15.4    -      -       +      +
    445C  ALA*     3.8     1.6    +      -       -      +
    652D  VAL*     3.4    23.7    -      -       +      +
    655D  LEU*     4.0    16.8    -      -       +      -
    656D  VAL*     3.9    12.3    -      -       +      -
    664D  GLU*     2.8    37.2    +      -       +      +
    667D  LEU*     3.7    38.6    -      -       +      -
    668D  SER*     3.6    21.1    -      -       -      -
    671D  LYS*     3.5    40.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 442 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    438C  THR      3.3     8.5    +      -       -      +
    439C  LEU*     3.9     7.6    -      -       +      +
    440C  GLU      3.2     0.2    -      -       -      -
    441C  PHE*     1.3    77.0    -      -       -      +
    443C  GLY*     1.3    67.2    +      -       -      +
    444C  ASP      3.0     1.6    -      -       -      -
    445C  ALA*     2.9    13.3    +      -       -      +
    446C  LEU*     3.0    13.9    +      -       +      +
    514C  ALA*     3.9    17.5    -      -       +      -
    517C  TYR*     4.0    18.6    -      -       +      -
    518C  ILE*     4.1    19.7    -      -       +      -
    522C  ARG*     4.3     2.9    -      -       -      +
    649D  PHE*     4.7    11.9    -      -       +      -
    652D  VAL*     3.8    11.9    -      -       +      +
    653D  ASP*     3.7    45.1    -      -       +      +
    656D  VAL*     4.2    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 443 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439C  LEU      2.7    17.5    +      -       -      -
    442C  LEU*     1.3    73.4    -      -       -      +
    444C  ASP*     1.3    60.1    +      -       -      +
    446C  LEU*     4.4     3.6    -      -       -      -
    447C  VAL*     2.8    33.3    +      -       -      +
    510C  GLU*     2.9    34.7    -      -       -      +
    514C  ALA*     3.4     9.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 444 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    440C  GLU*     2.8    18.4    +      -       +      +
    441C  PHE*     3.5    12.6    -      -       +      +
    442C  LEU      3.0     0.2    +      -       -      -
    443C  GLY*     1.3    79.9    -      -       -      +
    445C  ALA*     1.3    63.5    +      -       -      +
    447C  VAL*     4.3     0.9    -      -       -      +
    448C  ASN*     3.3    23.0    +      -       -      +
    480C  PHE*     6.0     1.4    -      -       -      -
    510C  GLU*     3.8    14.9    -      -       -      +
    763C   MN      4.1    14.7    +      -       -      -
    648D  ASN*     5.5     1.7    +      -       -      -
    671D  LYS*     5.8     5.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 445 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    441C  PHE      4.3     0.4    -      -       -      +
    442C  LEU      2.9     7.2    +      -       -      +
    444C  ASP*     1.3    79.9    +      -       -      +
    446C  LEU*     1.3    66.4    +      -       -      +
    448C  ASN*     3.4     5.6    +      -       -      +
    449C  PHE*     3.1    21.5    +      -       -      +
    645D  ALA      4.5     0.7    -      -       -      +
    648D  ASN*     3.6    19.1    +      -       -      +
    649D  PHE*     3.9    13.8    -      -       +      +
    652D  VAL*     3.3    43.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 446 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    442C  LEU*     3.0    16.4    +      -       +      +
    443C  GLY*     4.1     1.8    -      -       -      +
    445C  ALA*     1.3    79.8    -      -       -      +
    447C  VAL*     1.3    64.0    +      -       +      +
    449C  PHE*     3.0    10.2    +      -       +      +
    450C  PHE*     3.0    62.9    +      -       +      -
    513C  TRP*     3.6    40.4    -      -       +      +
    514C  ALA*     4.2     3.1    -      -       -      +
    517C  TYR*     4.1    29.6    -      -       +      -
    524C  ALA*     5.0     2.0    -      -       +      -
    527C  THR*     4.3     1.8    -      -       +      -
    649D  PHE*     4.1    27.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 447 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    443C  GLY      2.8    26.9    +      -       -      +
    444C  ASP      4.3     1.6    -      -       -      +
    446C  LEU*     1.3    76.6    -      -       +      +
    448C  ASN*     1.3    63.8    +      -       -      +
    450C  PHE*     3.0    18.7    +      -       +      +
    451C  ILE*     3.1    15.6    +      -       +      +
    480C  PHE*     3.6    33.0    -      -       +      -
    509C  PHE*     4.5     3.6    -      -       +      -
    510C  GLU*     4.4    10.1    -      -       -      -
    513C  TRP*     4.0    30.5    -      -       +      -
    531C  PHE*     3.7    27.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 448 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444C  ASP*     3.3    21.1    +      -       -      +
    445C  ALA*     3.5     4.9    +      -       -      +
    447C  VAL*     1.3    78.5    -      -       -      +
    449C  PHE*     1.3    57.6    +      -       -      +
    451C  ILE*     3.9     1.0    -      -       -      +
    452C  VAL*     2.9    36.0    +      -       -      +
    471C  LYS*     3.0    37.5    +      -       -      +
    475C  ILE*     3.8    24.7    -      -       +      +
    480C  PHE*     5.4     0.8    -      -       -      -
    644D  ASP*     5.7     2.0    +      -       -      -
    645D  ALA*     3.8    24.5    -      -       -      +
    648D  ASN*     4.4    12.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 449 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    445C  ALA      3.1    12.4    +      -       -      +
    446C  LEU*     3.0     9.5    +      -       +      +
    448C  ASN*     1.3    74.1    -      -       -      +
    450C  PHE*     1.3    88.9    +      +       -      +
    453C  ASP*     3.0    26.2    +      -       +      +
    524C  ALA*     4.8     2.0    -      -       +      -
    528C  ARG*     4.6     5.2    -      -       -      -
    642D  LEU*     4.3    11.4    -      -       +      -
    645D  ALA*     3.8    23.1    -      -       -      +
    646D  LEU*     4.0    22.4    -      -       +      -
    649D  PHE*     4.1    26.9    -      +       +      -
    717D  TYR*     3.5    43.3    -      +       -      -
    724D  ALA*     4.0    23.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 450 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446C  LEU*     3.0    59.5    +      -       +      -
    447C  VAL*     3.0    12.5    +      -       +      +
    449C  PHE*     1.3    90.7    -      +       -      +
    451C  ILE*     1.3    57.4    +      -       -      +
    453C  ASP*     4.7     0.7    -      -       -      -
    454C  LEU      3.2     7.8    +      -       -      -
    513C  TRP*     4.6     1.3    -      +       +      -
    524C  ALA      3.9     5.4    -      -       -      -
    527C  THR*     3.8    16.8    -      -       +      -
    528C  ARG*     3.3    50.3    -      -       +      -
    531C  PHE*     3.6    40.6    -      +       +      -
    532C  TYR*     2.5    35.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 451 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447C  VAL*     3.1    12.3    +      -       +      +
    448C  ASN      4.2     1.8    -      -       -      +
    450C  PHE*     1.3    73.8    -      -       -      +
    452C  VAL*     1.3    65.5    +      -       +      +
    453C  ASP      3.2     1.3    -      -       -      -
    454C  LEU*     3.9     6.1    -      -       -      +
    455C  LEU*     2.9    30.6    +      -       +      +
    471C  LYS*     5.5     1.3    -      -       +      +
    474C  LEU*     3.3    54.0    -      -       +      +
    475C  ILE*     4.2    12.6    -      -       +      -
    479C  PHE*     4.4    12.6    -      -       +      -
    480C  PHE*     4.0    14.6    -      -       +      -
    483C  LEU*     5.0     0.2    -      -       +      -
    531C  PHE*     4.1    20.6    -      -       +      -
    532C  TYR*     5.3     0.2    -      -       -      -
    539C  ILE*     3.9    21.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 452 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    448C  ASN*     2.9    29.0    +      -       -      +
    449C  PHE      3.2     0.9    +      -       -      +
    451C  ILE*     1.3    78.7    -      -       +      +
    453C  ASP*     1.3    57.8    +      -       -      +
    455C  LEU*     3.6     5.6    -      -       -      +
    456C  VAL*     2.9    31.4    +      -       -      +
    471C  LYS*     3.7    39.3    -      -       +      -
    641D  PHE*     3.9    20.1    -      -       +      +
    642D  LEU*     3.8    23.8    -      -       +      -
    645D  ALA*     3.7    24.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 453 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449C  PHE*     3.0    19.7    +      -       +      +
    450C  PHE*     4.3     0.4    -      -       -      -
    452C  VAL*     1.3    76.1    -      -       -      +
    454C  LEU*     1.3    63.3    +      -       -      +
    456C  VAL*     3.1    15.7    -      -       -      +
    457C  GLN*     3.0    19.8    +      -       -      +
    528C  ARG*     3.9     5.2    +      -       -      -
    532C  TYR*     3.4    15.1    +      -       -      +
    642D  LEU*     3.6    10.5    -      -       +      +
    717D  TYR*     2.3    39.6    +      -       -      -
    722D  ARG*     2.7    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 454 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450C  PHE      3.2    15.1    +      -       -      +
    451C  ILE*     3.3     7.1    +      -       -      +
    453C  ASP*     1.3    78.1    -      -       -      +
    455C  LEU*     1.3    53.5    +      -       -      +
    457C  GLN*     3.3     5.5    +      -       -      +
    458C  TYR*     2.9    65.7    +      -       +      +
    532C  TYR*     3.4    28.7    +      -       +      +
    536C  LYS*     3.7    43.3    -      -       +      +
    539C  ILE*     3.9    24.9    -      -       +      -
    540C  LEU*     3.9    16.2    -      -       +      -
    543C  ILE*     5.0     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 455 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    451C  ILE*     2.9    17.6    +      -       +      +
    452C  VAL*     3.6     5.6    -      -       -      +
    454C  LEU*     1.3    73.0    -      -       -      +
    456C  VAL*     1.3    61.7    +      -       -      +
    457C  GLN      3.1     1.8    -      -       -      -
    459C  SER*     2.7    46.0    +      -       -      +
    466C  PHE*     5.4     0.4    -      -       +      -
    467C  LEU*     3.9    18.2    -      -       +      +
    470C  LEU*     3.8    26.2    -      -       +      -
    471C  LYS*     3.7    33.7    -      -       +      +
    474C  LEU*     3.6    24.0    -      -       +      +
    543C  ILE*     3.9    19.0    -      -       +      +
    641D  PHE*     4.8     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 456 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452C  VAL      2.9    20.6    +      -       -      +
    453C  ASP*     3.1    17.9    -      -       -      +
    455C  LEU*     1.3    74.0    -      -       -      +
    457C  GLN*     1.3    61.2    +      -       -      +
    462C  LYS*     2.9    31.5    -      -       +      -
    467C  LEU*     4.5    11.2    -      -       +      +
    638D  THR*     3.4    37.5    -      -       +      +
    641D  PHE*     4.8    10.5    -      -       +      -
    642D  LEU*     3.8    26.2    -      -       +      -
    718D  ILE*     6.3     1.6    -      -       +      -
    722D  ARG*     4.3     6.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 457 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453C  ASP*     3.0    31.0    +      -       -      +
    454C  LEU*     3.3    21.4    +      -       -      +
    455C  LEU      3.1     0.4    -      -       -      -
    456C  VAL*     1.3    82.6    -      -       -      +
    458C  TYR*     1.3    77.7    +      -       +      +
    459C  SER      4.0     0.2    -      -       -      +
    462C  LYS*     2.9    20.0    +      -       -      +
    532C  TYR*     4.6     5.5    +      -       -      -
    536C  LYS*     5.8     0.2    -      -       -      +
    722D  ARG*     3.4    42.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 458 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299B  LYS*     5.8     0.7    +      -       -      -
    454C  LEU*     2.9    43.5    +      -       +      +
    457C  GLN*     1.3    94.7    +      -       +      +
    459C  SER*     1.3    68.6    +      -       -      +
    460C  PRO*     3.4     2.3    -      -       -      +
    536C  LYS*     2.5    35.2    +      -       -      -
    540C  LEU*     3.3    39.7    -      -       +      -
    543C  ILE*     3.9    12.4    -      -       +      +
    544C  LYS*     5.2    10.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 459 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299B  LYS*     4.8     5.0    +      -       -      -
    455C  LEU*     2.7    35.3    +      -       -      +
    456C  VAL      4.7     0.4    -      -       -      -
    457C  GLN      3.5     1.0    -      -       -      +
    458C  TYR*     1.3    73.7    -      -       -      +
    460C  PRO*     1.3    63.9    -      -       -      +
    461C  ASN      2.3    27.5    +      -       -      -
    462C  LYS*     2.5    29.5    +      -       -      -
    466C  PHE*     3.0    25.1    -      -       -      -
    467C  LEU*     4.4     6.8    -      -       -      +
    543C  ILE*     3.9     7.1    -      -       -      +
----------------------------------------------------------
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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