Contacts of the helix formed by residues 754 - 779 (chain F) in PDB entry 4OQB


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 ASN 754 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    716F  VAL*     5.1     0.2    -      -       -      +
    720F  VAL*     4.0    10.9    -      -       -      +
    752F  LEU      4.9     0.7    -      -       -      -
    753F  ASN*     1.3   101.3    +      -       -      +
    755F  ALA*     1.3    62.2    +      -       -      +
    756F  ASP*     3.3    21.8    -      -       -      +
    757F  SER*     3.0    25.8    +      -       -      +
    758F  VAL*     3.5    10.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 755 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    717F  GLN*     6.3     1.6    -      -       +      -
    720F  VAL*     4.5    12.6    -      -       +      +
    754F  ASN*     1.3    75.2    -      -       -      +
    756F  ASP*     1.3    59.8    +      -       -      +
    758F  VAL*     3.2    12.9    -      -       -      +
    759F  GLN      3.8     1.2    +      -       -      -
    887F  THR*     3.2    33.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 756 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    754F  ASN*     3.3    18.7    -      -       -      +
    755F  ALA*     1.3    74.2    +      -       -      +
    757F  SER*     1.3    65.8    +      -       -      +
    758F  VAL      3.4     0.7    -      -       -      -
    759F  GLN*     3.5    20.0    -      -       +      +
    760F  ALA*     2.8    28.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 757 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    751F  LEU      5.3     2.0    -      -       -      -
    752F  LEU*     4.0    18.8    -      -       -      +
    753F  ASN      3.9     6.1    +      -       -      -
    754F  ASN*     3.0    40.6    +      -       -      +
    756F  ASP*     1.3    80.6    +      -       -      +
    758F  VAL*     1.3    65.1    +      -       -      +
    760F  ALA*     3.3     7.2    +      -       -      +
    761F  LYS*     3.0    35.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 758 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    713F  LEU*     3.5    46.6    -      -       +      +
    716F  VAL*     4.8    11.2    -      -       +      -
    717F  GLN*     4.5    15.0    -      -       +      +
    752F  LEU*     5.1     3.3    -      -       +      +
    754F  ASN      3.5    14.4    -      -       -      +
    755F  ALA*     3.2    24.0    -      -       -      +
    757F  SER*     1.3    78.1    +      -       -      +
    759F  GLN*     1.3    52.6    -      -       -      +
    761F  LYS*     3.3     2.5    +      -       -      +
    762F  VAL*     2.7    33.1    +      -       -      +
    885F  PRO*     4.1    17.7    -      -       +      -
    887F  THR*     4.3    11.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 759 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    755F  ALA      4.0     5.6    -      -       -      +
    756F  ASP*     3.4    26.3    +      -       -      +
    757F  SER      3.3     0.2    -      -       -      -
    758F  VAL*     1.3    82.3    -      -       -      +
    760F  ALA*     1.3    57.6    +      -       -      +
    762F  VAL*     3.5     7.5    -      -       +      +
    763F  GLU*     2.9    32.5    +      -       +      +
    887F  THR*     4.0    13.9    -      -       +      +
    888F  GLY*     3.3    36.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 760 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689F  TYR*     3.8    12.7    -      -       +      -
    756F  ASP      2.8    17.6    +      -       -      +
    757F  SER*     3.5     9.0    -      -       -      +
    758F  VAL      3.3     0.2    -      -       -      -
    759F  GLN*     1.3    77.2    -      -       -      +
    761F  LYS*     1.3    64.6    +      -       +      +
    763F  GLU*     3.5    10.9    +      -       -      +
    764F  MET*     3.1    24.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 761 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689F  TYR*     4.4     6.5    -      -       -      +
    690F  GLU*     5.0     7.0    +      -       -      -
    713F  LEU*     3.5    23.4    -      -       +      +
    736F  PHE*     4.0    12.3    -      -       +      -
    737F  TYR*     3.4    26.7    +      -       -      -
    742F  HIS*     3.7    14.8    +      -       -      +
    744F  PHE*     5.2     0.4    -      -       -      -
    750F  PRO*     5.0     6.7    -      -       -      +
    752F  LEU*     4.1    16.4    -      -       +      +
    757F  SER*     3.0    21.4    +      -       -      +
    758F  VAL      3.8     0.4    -      -       -      +
    760F  ALA*     1.3    79.3    -      -       -      +
    762F  VAL*     1.3    64.3    +      -       -      +
    764F  MET*     3.5    32.2    -      -       +      +
    765F  LEU*     3.3    29.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 762 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710F  TYR*     4.2     4.8    -      -       +      -
    713F  LEU*     3.5     8.5    -      -       +      +
    758F  VAL      2.7    22.3    +      -       -      +
    759F  GLN*     3.5    10.1    -      -       +      +
    761F  LYS*     1.3    71.8    -      -       -      +
    763F  GLU*     1.3    63.8    +      -       -      +
    765F  LEU*     3.4     6.2    +      -       -      +
    766F  ASP*     3.0    30.7    +      -       -      +
    884F  ALA*     6.1     0.2    -      -       +      -
    885F  PRO*     3.6    30.1    -      -       +      +
    887F  THR      5.5     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 763 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689F  TYR*     3.2    24.4    +      -       -      +
    759F  GLN*     2.9    20.5    +      -       +      +
    760F  ALA*     3.6     8.9    -      -       -      +
    762F  VAL*     1.3    72.5    -      -       -      +
    764F  MET*     1.3    65.9    +      -       -      +
    766F  ASP*     3.3    11.9    +      -       +      +
    767F  ASN*     2.9    34.6    +      -       -      +
    865F  ARG*     4.5     2.1    +      -       -      +
    909F  HIS*     3.4    30.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET 764 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    686F  MET*     4.5     2.0    -      -       -      +
    689F  TYR*     3.1    58.9    -      -       +      +
    691F  ILE*     3.6    35.2    -      -       +      -
    736F  PHE*     4.7     0.7    -      -       -      -
    742F  HIS*     3.4    26.5    -      -       -      +
    760F  ALA      3.1    13.8    +      -       -      +
    761F  LYS*     3.5    27.1    -      -       +      +
    763F  GLU*     1.3    75.6    -      -       -      +
    765F  LEU*     1.3    67.9    +      -       +      +
    767F  ASN*     3.2     3.1    +      -       -      +
    768F  LEU*     2.7    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 765 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    691F  ILE*     5.8     0.4    -      -       +      -
    706F  ILE*     4.2    10.0    -      -       +      +
    709F  ALA*     3.9    13.0    -      -       +      -
    710F  TYR*     3.4    60.8    +      -       +      +
    713F  LEU*     4.1     9.2    -      -       +      -
    736F  PHE*     3.9     9.6    -      -       +      -
    740F  ILE*     3.5    25.4    -      -       +      -
    761F  LYS      3.3    12.6    +      -       -      +
    762F  VAL      3.8     5.6    -      -       -      +
    763F  GLU      3.4     0.2    -      -       -      -
    764F  MET*     1.3    89.8    -      -       +      +
    766F  ASP*     1.3    57.2    +      -       -      +
    768F  LEU*     3.8    11.4    -      -       +      +
    769F  LEU*     2.9    33.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 766 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710F  TYR*     2.7    25.6    +      -       -      -
    762F  VAL*     3.0    23.5    +      -       -      +
    763F  GLU*     3.5    11.0    -      -       +      +
    764F  MET      3.3     0.2    -      -       -      -
    765F  LEU*     1.3    76.2    -      -       -      +
    767F  ASN*     1.3    61.9    +      -       -      +
    769F  LEU*     3.6     3.0    +      -       -      +
    770F  ASP*     3.0    30.9    +      -       -      +
    868F  ASN*     5.0     1.8    -      -       -      +
    880F  ALA*     5.5     2.8    -      -       -      +
    881F  PRO*     4.8     9.5    -      -       -      +
    889F  TYR*     4.9     8.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 767 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    686F  MET*     3.5    22.4    -      -       +      -
    689F  TYR*     3.1    21.6    +      -       +      -
    763F  GLU*     2.9    29.3    +      -       -      +
    764F  MET      3.7     1.6    -      -       -      +
    766F  ASP*     1.3    76.1    -      -       -      +
    768F  LEU*     1.3    66.3    +      -       -      +
    770F  ASP*     3.1    13.3    +      -       -      +
    771F  ILE*     3.2    18.0    +      -       -      +
    865F  ARG*     3.6    28.1    +      -       -      +
    867F  THR*     3.7     5.9    +      -       -      +
    868F  ASN*     3.2    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 768 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    686F  MET*     4.0    20.9    -      -       +      -
    691F  ILE*     5.1    22.0    -      -       +      -
    696F  MET*     5.7     9.9    -      -       +      -
    701F  LEU*     5.3     9.0    -      -       +      -
    706F  ILE*     4.2    28.3    -      -       +      -
    740F  ILE*     6.3     2.0    -      -       +      -
    764F  MET*     2.7    24.6    +      -       +      +
    765F  LEU*     3.8    13.2    -      -       +      +
    767F  ASN*     1.3    71.1    -      -       -      +
    769F  LEU*     1.3    64.9    +      -       -      +
    771F  ILE*     3.3    10.0    +      -       +      +
    772F  GLU*     3.3    35.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 769 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    703F  LYS*     3.8    35.0    -      -       +      +
    706F  ILE*     3.7    41.5    -      -       +      -
    710F  TYR*     5.1     6.5    -      -       +      +
    765F  LEU      2.9    17.8    +      -       -      +
    766F  ASP*     3.7     7.4    -      -       -      +
    768F  LEU*     1.3    78.5    -      -       -      +
    770F  ASP*     1.3    61.8    +      -       -      +
    772F  GLU*     3.2     9.1    +      -       +      +
    773F  VAL*     2.9    40.5    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 770 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    766F  ASP      3.0    15.5    +      -       -      +
    767F  ASN      3.1     6.9    +      -       -      +
    769F  LEU*     1.3    83.9    -      -       -      +
    771F  ILE*     1.3    56.9    -      -       +      +
    773F  VAL*     3.5    11.0    +      -       -      +
    774F  ALA*     2.8    27.4    +      -       -      +
    867F  THR      4.4     7.1    -      -       -      +
    868F  ASN*     3.0    48.1    -      -       -      +
    870F  ALA*     5.1     1.4    -      -       -      +
    871F  GLY*     5.3     5.4    +      -       -      +
    878F  ARG*     3.4    27.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 771 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679F  VAL*     4.1    14.5    -      -       +      +
    682F  MET*     3.4    44.4    -      -       +      +
    683F  LYS*     5.2     3.6    -      -       +      +
    686F  MET*     3.4    33.7    -      -       +      -
    767F  ASN      3.2    11.1    +      -       -      +
    768F  LEU*     3.6    12.8    -      -       +      +
    769F  LEU      3.2     0.2    -      -       -      -
    770F  ASP*     1.3    75.0    -      -       -      +
    772F  GLU*     1.3    61.8    +      -       +      +
    774F  ALA*     3.2     7.7    +      -       -      +
    775F  TYR*     2.9    47.7    +      -       +      -
    867F  THR*     4.8     7.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 772 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    696F  MET*     3.6    19.8    -      -       -      +
    697F  PRO      4.6     2.4    -      -       -      +
    699F  GLY      4.1     0.2    -      -       -      +
    700F  LYS*     3.7    38.7    -      -       +      +
    701F  LEU*     3.8    12.1    +      -       +      +
    706F  ILE*     6.0     2.7    -      -       +      -
    768F  LEU*     3.3    31.1    +      -       +      +
    769F  LEU*     3.2    11.6    +      -       +      +
    771F  ILE*     1.3    74.9    -      -       +      +
    773F  VAL*     1.3    55.7    +      -       +      +
    775F  TYR*     3.5    20.9    +      -       -      +
    776F  SER*     2.7    35.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 773 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    703F  LYS*     6.2     0.4    -      -       -      -
    769F  LEU*     2.9    38.5    +      -       +      +
    770F  ASP*     3.5    13.5    -      -       -      +
    772F  GLU*     1.3    75.6    -      -       +      +
    774F  ALA*     1.3    63.2    +      -       -      +
    776F  SER*     3.1     9.2    +      -       -      -
    777F  LEU*     3.0    44.3    +      -       +      +
    871F  GLY*     4.4    18.2    -      -       -      -
    875F  GLN*     3.7    28.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 774 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677F  PHE*     3.8    11.5    -      -       +      -
    679F  VAL*     5.3     6.5    -      -       +      +
    682F  MET*     4.0    21.8    -      -       +      -
    770F  ASP      2.8    18.7    +      -       -      +
    771F  ILE      3.2     6.5    +      -       -      +
    773F  VAL*     1.3    75.6    -      -       -      +
    775F  TYR*     1.3    56.9    +      -       -      +
    777F  LEU*     3.7     5.1    +      -       -      +
    778F  LEU*     3.1    28.8    +      -       -      +
    870F  ALA*     3.9    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 775 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679F  VAL*     3.3    36.0    -      -       +      +
    683F  LYS*     3.2    31.3    +      -       +      +
    697F  PRO*     3.6    20.2    -      -       +      +
    700F  LYS*     6.3     2.7    -      -       +      -
    771F  ILE*     2.9    33.3    +      -       +      -
    772F  GLU*     3.6    25.8    -      -       -      +
    774F  ALA*     1.3    75.2    -      -       -      +
    776F  SER*     1.3    56.6    +      -       -      +
    778F  LEU*     3.2     8.9    +      -       +      -
    779F  ARG*     2.7    81.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 776 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    700F  LYS*     5.7     4.7    -      -       -      +
    772F  GLU      2.7    21.2    +      -       -      -
    773F  VAL*     3.1    12.8    +      -       -      -
    775F  TYR*     1.3    75.8    -      -       -      +
    777F  LEU*     1.3    62.8    +      -       -      +
    779F  ARG*     3.0    21.6    -      -       -      +
    780F  GLY*     5.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 777 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677F  PHE*     4.1    19.5    -      -       +      -
    773F  VAL*     3.0    43.4    +      -       +      +
    774F  ALA*     3.9     8.7    -      -       -      +
    775F  TYR      3.2     0.2    -      -       -      -
    776F  SER*     1.3    80.6    -      -       -      +
    778F  LEU*     1.3    64.2    +      -       -      +
    779F  ARG      3.4     2.8    +      -       -      -
    780F  GLY*     4.7     0.3    -      -       -      -
    796F  LYS*     3.2    61.5    -      -       +      +
    797F  LEU*     5.8     0.7    -      -       -      -
    798F  LYS*     5.8     0.2    -      -       +      -
    870F  ALA      5.0     4.3    -      -       -      +
    874F  SER*     4.2    21.1    -      -       -      +
    875F  GLN*     5.6     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 778 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677F  PHE*     4.2    19.2    -      -       +      +
    679F  VAL*     4.1    25.8    -      -       +      -
    774F  ALA      3.1    15.2    +      -       -      +
    775F  TYR*     3.7    12.1    -      -       +      +
    777F  LEU*     1.3    78.7    -      -       -      +
    779F  ARG*     1.3    62.7    +      -       +      +
    780F  GLY      3.3     1.6    +      -       -      +
    793F  ASN*     3.4    30.7    -      -       -      +
    796F  LYS*     2.8    21.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 779 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    697F  PRO*     3.3    27.0    +      -       -      +
    698F  LEU*     4.8     6.9    +      -       -      +
    700F  LYS*     3.6    28.5    -      -       -      +
    775F  TYR*     2.7    60.5    +      -       +      +
    776F  SER*     3.0    19.9    -      -       -      +
    777F  LEU      4.0     0.4    -      -       -      -
    778F  LEU*     1.3    74.7    -      -       +      +
    780F  GLY*     1.3    57.5    +      -       -      +
----------------------------------------------------------
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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