Contacts of the helix formed by residues 754 - 784 (chain A) in PDB entry 5FLZ


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 GLU 754 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    714A  ARG*     5.6     8.5    -      -       -      +
    755A  ASP*     1.4    75.0    +      -       +      +
    756A  ALA*     3.4     5.8    -      -       +      +
    757A  ALA*     3.6    20.1    +      -       -      +
    758A  LEU*     3.3    24.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 755 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    754A  GLU*     1.4    83.3    -      -       +      +
    756A  ALA*     1.3    64.7    +      -       -      +
    758A  LEU*     3.4    20.0    +      -       -      +
    759A  GLU*     3.4    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 756 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    754A  GLU*     3.4     4.0    -      -       +      +
    755A  ASP*     1.3    77.6    -      -       -      +
    757A  ALA*     1.4    62.2    +      -       -      +
    759A  GLU*     3.3    13.1    +      -       -      +
    760A  LEU*     3.1    24.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 757 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    754A  GLU      3.6    22.8    +      -       -      +
    755A  ASP      3.4     0.2    -      -       -      -
    756A  ALA*     1.4    77.4    -      -       -      +
    758A  LEU*     1.4    61.7    +      -       +      +
    760A  LEU*     3.5    12.3    +      -       -      +
    761A  ILE*     2.9    41.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 758 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    623A  ARG*     5.3    13.0    -      -       -      +
    625A  ILE*     5.9     0.2    -      -       +      -
    754A  GLU      3.3    19.1    -      -       -      +
    755A  ASP*     3.6    11.4    -      -       -      +
    756A  ALA      3.2     0.2    -      -       -      -
    757A  ALA*     1.4    84.1    -      -       +      +
    759A  GLU*     1.4    56.3    +      -       +      +
    761A  ILE*     3.3    20.7    +      -       +      +
    762A  GLN*     3.1    33.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 759 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    755A  ASP*     3.4    26.3    +      -       -      +
    756A  ALA*     3.3    11.3    +      -       -      +
    758A  LEU*     1.4    73.0    -      -       +      +
    760A  LEU*     1.3    65.9    +      -       -      +
    762A  GLN*     3.1    19.3    +      -       -      +
    763A  LYS*     3.1    11.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 760 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    709A  PHE*     4.3    26.0    -      -       +      -
    756A  ALA      3.1    13.9    +      -       -      +
    757A  ALA*     3.6    10.8    -      -       -      +
    759A  GLU*     1.3    80.8    -      -       -      +
    761A  ILE*     1.4    49.4    -      -       +      +
    763A  LYS*     3.0    52.1    +      -       -      +
    764A  LEU*     3.0    33.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 761 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    624A  ARG*     4.8     0.7    -      -       -      +
    625A  ILE*     2.6    50.7    -      -       +      -
    757A  ALA*     2.9    31.0    +      -       +      +
    758A  LEU*     3.4    19.3    -      -       +      +
    759A  GLU      3.3     0.2    -      -       -      -
    760A  LEU*     1.4    71.8    -      -       +      +
    762A  GLN*     1.3    77.1    +      -       -      +
    764A  LEU*     3.3    18.3    +      -       +      +
    765A  ILE*     2.9    40.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 762 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    624A  ARG*     3.9     9.7    -      -       -      +
    758A  LEU*     3.1    19.6    +      -       +      +
    759A  GLU*     3.1    10.9    +      -       -      +
    761A  ILE*     1.3    83.0    -      -       -      +
    763A  LYS*     1.3    63.9    +      -       -      +
    765A  ILE*     3.2    36.8    +      -       -      +
    766A  GLU*     3.2    12.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 763 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    705A  LYS*     4.1    11.5    -      -       -      +
    709A  PHE*     4.1    10.7    -      -       -      -
    759A  GLU      3.1     9.7    +      -       -      +
    760A  LEU*     3.0    39.0    +      -       -      +
    762A  GLN*     1.3    78.1    -      -       -      +
    764A  LEU*     1.4    65.4    +      -       -      +
    766A  GLU*     3.5     6.5    +      -       -      +
    767A  TYR*     3.1    63.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 764 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    705A  LYS*     5.5     1.1    -      -       -      -
    706A  PHE*     5.0    22.5    -      -       +      -
    709A  PHE*     3.9    42.0    -      -       +      -
    760A  LEU*     3.0    36.8    +      -       +      +
    761A  ILE*     3.4    20.0    -      -       +      +
    763A  LYS*     1.4    85.9    -      -       -      +
    765A  ILE*     1.4    51.3    +      -       +      +
    767A  TYR*     3.1    16.4    +      -       +      +
    768A  ILE*     2.8    38.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 765 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    624A  ARG*     3.2    41.5    -      -       -      +
    625A  ILE*     4.2     4.3    -      -       +      -
    761A  ILE*     2.9    26.5    +      -       +      +
    762A  GLN*     3.2    23.9    +      -       -      +
    764A  LEU*     1.4    70.6    -      -       +      +
    766A  GLU*     1.4    68.2    +      -       -      +
    768A  ILE*     3.5    17.5    -      -       +      +
    769A  SER*     3.1    23.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 766 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    762A  GLN      3.2     9.6    +      -       -      +
    763A  LYS*     3.5     8.5    +      -       -      +
    764A  LEU      3.4     0.2    -      -       -      -
    765A  ILE*     1.4    80.3    -      -       -      +
    767A  TYR*     1.3    75.2    +      -       +      +
    769A  SER*     2.8    23.1    +      -       -      +
    770A  ASN*     2.9    51.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 767 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    702A  ILE*     5.2    13.4    -      -       +      +
    705A  LYS*     3.6    39.2    +      -       -      -
    763A  LYS*     3.1    51.8    -      -       +      +
    764A  LEU*     3.1    17.0    +      -       +      +
    766A  GLU*     1.3    89.6    -      -       +      +
    768A  ILE*     1.3    55.5    +      -       +      +
    770A  ASN*     3.3     8.8    +      -       -      +
    771A  ALA*     3.0    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 768 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    625A  ILE      5.9     0.4    -      -       -      +
    628A  ALA*     4.6    27.6    -      -       +      +
    629A  THR*     5.3     1.3    -      -       -      +
    632A  LEU*     4.7    14.3    -      -       +      +
    706A  PHE*     3.8    36.8    -      -       +      -
    764A  LEU*     2.8    22.7    +      -       +      +
    765A  ILE*     3.5    20.4    -      -       +      +
    767A  TYR*     1.3    74.0    -      -       -      +
    769A  SER*     1.4    56.6    +      -       -      +
    771A  ALA*     3.2     6.9    +      -       -      +
    772A  SER*     2.7    48.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 769 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    765A  ILE*     3.1     8.7    +      -       -      -
    766A  GLU*     2.8    28.1    +      -       -      +
    768A  ILE*     1.4    81.6    -      -       -      +
    770A  ASN*     1.4    58.9    +      -       -      +
    772A  SER*     3.2     7.9    +      -       -      -
    773A  SER*     2.7    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 770 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    702A  ILE*     6.5     1.1    -      -       +      -
    766A  GLU*     2.9    47.9    +      -       -      +
    767A  TYR*     3.5    10.4    -      -       -      +
    769A  SER*     1.4    77.9    +      -       -      +
    771A  ALA*     1.4    64.4    +      -       -      +
    773A  SER*     3.2    16.6    +      -       -      -
    774A  ILE*     3.2    17.1    +      -       -      +
    789A  GLU*     4.0     3.3    -      -       -      +
    793A  PHE*     3.3    42.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 771 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    632A  LEU*     5.0     7.6    -      -       +      -
    699A  ILE*     6.1     0.7    -      -       +      -
    702A  ILE*     4.7    19.5    -      -       +      +
    767A  TYR      3.0    14.3    +      -       -      +
    768A  ILE*     3.2     7.2    +      -       -      +
    770A  ASN*     1.4    80.0    -      -       -      +
    772A  SER*     1.3    58.1    +      -       -      +
    774A  ILE*     3.0    17.3    -      -       +      +
    775A  PHE*     2.9    49.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 772 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    632A  LEU*     3.5    19.2    -      -       -      +
    768A  ILE*     2.7    31.8    +      -       -      +
    769A  SER*     3.4     8.3    -      -       -      -
    771A  ALA*     1.3    71.2    -      -       -      +
    773A  SER*     1.3    63.4    +      -       -      +
    775A  PHE*     3.3    11.0    +      -       -      +
    776A  ARG*     3.0    23.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 773 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    769A  SER      2.7    19.5    +      -       -      -
    770A  ASN*     3.2     5.5    +      -       -      -
    772A  SER*     1.3    72.7    -      -       -      +
    774A  ILE*     1.4    59.4    +      -       -      +
    776A  ARG*     3.2    12.9    +      -       -      +
    777A  LYS      3.1    15.9    +      -       -      -
    789A  GLU*     2.8    37.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 774 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    698A  GLN*     6.2     1.1    -      -       -      +
    699A  ILE*     4.0    29.4    -      -       +      -
    702A  ILE*     5.7     7.9    -      -       +      -
    770A  ASN      3.2     9.4    +      -       -      +
    771A  ALA*     3.0    33.0    -      -       +      +
    773A  SER*     1.4    68.6    -      -       -      +
    775A  PHE*     1.4    61.3    +      -       +      +
    777A  LYS*     3.2     6.1    +      -       -      +
    778A  CYS*     2.8    40.6    +      -       -      -
    787A  SER*     3.9     0.2    +      -       -      -
    789A  GLU*     3.2    27.1    -      -       +      +
    790A  LYS*     3.7    36.1    -      -       +      +
    793A  PHE*     5.0     9.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 775 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    632A  LEU*     3.9    24.2    -      -       +      -
    635A  LYS*     5.8     3.4    -      -       +      -
    636A  MET*     3.7    39.7    -      -       +      -
    639A  PHE*     3.9    30.9    -      +       +      -
    699A  ILE*     3.4    37.0    -      -       +      -
    703A  VAL*     5.1     0.9    -      -       +      -
    771A  ALA*     2.9    37.0    +      -       +      +
    772A  SER*     3.3     6.7    +      -       -      +
    774A  ILE*     1.4    86.2    -      -       +      +
    776A  ARG*     1.3    58.4    +      -       -      +
    778A  CYS*     3.0    24.7    +      -       +      +
    779A  LEU*     3.3    18.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 776 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    772A  SER      3.0    12.9    +      -       -      +
    773A  SER*     3.4    13.2    +      -       -      +
    774A  ILE      3.2     0.2    -      -       -      -
    775A  PHE*     1.3    77.2    -      -       -      +
    777A  LYS*     1.4    61.6    +      -       -      +
    779A  LEU*     3.4    31.0    +      -       +      +
    780A  ILE*     3.9    11.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 777 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    773A  SER      3.1     9.1    +      -       -      +
    774A  ILE      3.4     4.9    -      -       -      +
    776A  ARG*     1.4    76.1    -      -       -      +
    778A  CYS*     1.3    61.4    +      -       -      +
    779A  LEU      3.2     0.9    +      -       -      -
    780A  ILE*     3.2    46.1    +      -       +      +
    781A  ASN*     3.0     6.1    +      -       -      +
    784A  GLN      5.4     0.8    +      -       -      -
    785A  GLU      5.2     0.6    +      -       -      -
    786A  LEU*     3.4    19.4    +      -       -      +
    787A  SER*     3.3    23.8    -      -       -      +
    788A  THR*     3.8    29.2    -      -       +      +
    789A  GLU*     3.9    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 778 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639A  PHE*     5.8     5.4    -      -       +      -
    699A  ILE*     4.8     4.5    -      -       -      -
    774A  ILE*     2.8    29.0    +      -       -      +
    775A  PHE*     3.0    15.2    +      -       +      +
    777A  LYS*     1.3    72.6    -      -       -      +
    779A  LEU*     1.3    60.7    +      -       -      +
    781A  ASN*     3.2    28.2    +      -       -      +
    782A  PHE*     3.7     4.2    +      -       -      +
    787A  SER*     3.8     4.9    -      -       -      -
    790A  LYS*     3.4    45.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 779 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    639A  PHE*     3.8    21.8    -      -       +      -
    775A  PHE      3.3    13.8    +      -       -      +
    776A  ARG*     3.5    25.6    -      -       +      +
    777A  LYS      3.2     0.8    -      -       -      -
    778A  CYS*     1.3    74.3    -      -       -      +
    780A  ILE*     1.4    62.6    +      -       +      +
    782A  PHE*     3.5    21.0    +      -       -      +
    783A  THR*     3.9     6.4    +      -       -      -
    352C  MET*     3.5    37.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 780 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    776A  ARG*     3.9    13.0    -      -       -      +
    777A  LYS*     3.3    49.1    -      -       +      +
    778A  CYS      3.2     0.2    -      -       -      -
    779A  LEU*     1.4    75.3    -      -       +      +
    781A  ASN*     1.3    55.8    +      -       -      +
    783A  THR*     3.3    12.0    +      -       +      -
    784A  GLN*     3.0    29.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 781 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    777A  LYS*     3.0    17.3    -      -       -      +
    778A  CYS*     3.2    17.3    +      -       -      +
    780A  ILE*     1.3    72.0    -      -       -      +
    782A  PHE*     1.4    62.7    +      -       -      +
    784A  GLN      2.9    12.1    -      -       -      -
    785A  GLU*     2.9    25.0    +      -       -      -
    786A  LEU*     3.0    30.8    -      -       -      +
    787A  SER*     3.1    31.3    -      -       -      +
    790A  LYS*     4.3    11.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 782 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    642A  THR*     4.8    17.7    -      -       +      -
    646A  TYR*     4.0    45.8    -      +       -      -
    778A  CYS      3.7     3.6    +      -       -      +
    779A  LEU*     3.5    14.3    +      -       -      +
    780A  ILE      3.4     0.6    -      -       -      -
    781A  ASN*     1.4    76.1    -      -       -      +
    783A  THR*     1.4    64.3    +      -       -      +
    333C  ARG*     4.9     7.4    -      -       -      -
    337C  LYS*     4.1    28.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 783 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    779A  LEU      3.9     5.5    +      -       -      -
    780A  ILE*     3.3    13.3    +      -       +      +
    782A  PHE*     1.4    80.8    -      -       -      +
    784A  GLN*     1.4    73.1    +      -       +      +
    337C  LYS*     4.4    16.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 784 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    777A  LYS*     5.4     0.3    +      -       -      -
    780A  ILE*     3.0    17.5    +      -       +      +
    781A  ASN*     2.9    14.0    +      -       -      -
    783A  THR*     1.4    85.5    -      -       +      +
    785A  GLU*     1.4   100.8    +      -       -      +
    786A  LEU      4.4     0.7    -      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il