Contacts of the helix formed by residues 722 - 749 (chain F) in PDB entry 4UJ3


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 722 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720F  LEU      3.2     5.7    -      -       -      +
    721F  MET*     1.3    77.9    -      -       -      +
    723F  ALA*     1.3    61.1    +      -       -      +
    724F  ILE      3.4     0.7    -      -       -      -
    725F  GLN*     3.5     9.3    +      -       -      +
    726F  LYS*     3.4    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 723 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720F  LEU*     3.6    18.3    -      -       -      +
    721F  MET      3.2     0.4    -      -       -      -
    722F  GLU*     1.3    80.0    -      -       -      +
    724F  ILE*     1.3    57.8    +      -       -      +
    726F  LYS*     3.5     4.2    +      -       -      +
    727F  GLN*     3.1    30.8    +      -       -      +
    724I  ILE*     3.9    19.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 724 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720F  LEU      4.4     4.9    -      -       -      +
    721F  MET*     3.8    32.1    +      -       +      +
    722F  GLU      3.4     0.2    -      -       -      -
    723F  ALA*     1.3    74.5    -      -       -      +
    725F  GLN*     1.3    63.3    +      -       -      +
    727F  GLN*     4.1     3.8    -      -       -      +
    728F  GLU*     3.3    24.6    +      -       +      +
    719I  GLU      5.3     0.2    -      -       -      +
    720I  LEU*     4.3    11.2    -      -       -      +
    723I  ALA*     3.3    35.4    -      -       +      +
    724I  ILE*     3.3    29.6    -      -       +      -
    727I  GLN*     5.9     6.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 725 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    721F  MET      4.0     7.0    +      -       -      +
    722F  GLU*     3.5    14.2    +      -       -      +
    723F  ALA      3.2     0.6    -      -       -      -
    724F  ILE*     1.3    81.5    -      -       -      +
    726F  LYS*     1.3    59.5    +      -       -      +
    728F  GLU*     4.1     3.8    -      -       -      +
    729F  GLU*     3.4    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 726 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    722F  GLU      3.4    13.6    +      -       -      +
    723F  ALA*     3.5     4.2    +      -       -      +
    724F  ILE      3.4     0.2    -      -       -      -
    725F  GLN*     1.3    78.0    -      -       -      +
    727F  GLN*     1.3    59.1    +      -       -      +
    728F  GLU      3.2     2.2    -      -       -      -
    729F  GLU*     3.2     9.2    +      -       -      +
    730F  ILE*     3.1    28.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 727 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    723F  ALA      3.1    17.3    +      -       -      +
    724F  ILE*     4.9     3.4    -      -       -      +
    726F  LYS*     1.3    74.7    -      -       -      +
    728F  GLU*     1.3    63.1    +      -       -      +
    729F  GLU      3.2     0.4    -      -       -      -
    730F  ILE*     3.4    16.1    +      -       +      +
    731F  ASN*     3.3    16.6    +      -       -      +
    724I  ILE*     4.2    15.4    -      -       +      +
    727I  GLN*     4.2    11.9    -      -       +      +
    728I  GLU*     3.0    43.0    -      -       -      +
    731I  ASN*     3.3    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 728 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    724F  ILE*     3.3    23.1    +      -       +      +
    725F  GLN*     4.1     4.9    -      -       -      +
    726F  LYS      3.2     0.4    -      -       -      -
    727F  GLN*     1.3    76.9    -      -       -      +
    729F  GLU*     1.3    60.7    +      -       -      +
    730F  ILE      3.2     0.4    -      -       -      -
    731F  ASN*     3.5     8.3    +      -       -      +
    732F  PHE*     3.3    19.9    +      -       -      +
    727I  GLN*     4.7    15.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 729 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    725F  GLN      3.4    13.6    +      -       -      +
    726F  LYS*     3.2    13.6    +      -       -      +
    727F  GLN      3.2     0.4    -      -       -      -
    728F  GLU*     1.3    78.1    -      -       -      +
    730F  ILE*     1.3    58.6    +      -       -      +
    732F  PHE*     3.5    10.8    -      -       -      +
    733F  ARG*     3.1    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 730 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    726F  LYS      3.1    18.3    +      -       -      +
    727F  GLN*     3.6    20.2    -      -       +      +
    729F  GLU*     1.3    76.4    -      -       +      +
    731F  ASN*     1.3    54.6    +      -       -      +
    733F  ARG*     3.0     7.1    +      -       +      +
    734F  LEU*     2.7    45.8    +      -       +      +
    731I  ASN*     2.9    22.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 731 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    727F  GLN      3.3     3.5    +      -       -      +
    728F  GLU*     3.7     9.2    -      -       -      +
    730F  ILE*     1.3    77.6    -      -       -      +
    732F  PHE*     1.3    64.3    +      -       -      +
    734F  LEU*     4.0     3.3    -      -       -      +
    735F  GLN*     2.9    34.7    +      -       -      +
    727I  GLN*     2.7    29.6    +      -       -      +
    730I  ILE*     3.3    22.7    -      -       -      +
    731I  ASN*     2.3    45.8    +      -       -      -
    734I  LEU*     4.2     8.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 732 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    728F  GLU      3.3    10.4    +      -       -      +
    729F  GLU*     3.5    13.2    -      -       -      +
    730F  ILE      3.2     0.2    -      -       -      -
    731F  ASN*     1.3    79.0    -      -       -      +
    733F  ARG*     1.3    61.5    +      -       -      +
    735F  GLN*     4.4     2.0    -      -       -      +
    736F  ASP*     3.2    26.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 733 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    729F  GLU      3.1    10.2    +      -       -      +
    730F  ILE*     3.0    11.9    +      -       +      +
    732F  PHE*     1.3    78.2    -      -       -      +
    734F  LEU*     1.3    65.3    +      -       +      +
    736F  ASP*     3.6     3.8    +      -       -      +
    737F  TYR      3.2    16.1    +      -       -      -
     44G  ILE*     3.5    21.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 734 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    730F  ILE*     2.7    28.1    +      -       +      +
    731F  ASN      4.0     2.7    -      -       -      +
    733F  ARG*     1.3    72.9    -      -       -      +
    735F  GLN*     1.3    62.6    +      -       -      +
    737F  TYR*     3.3     5.7    -      -       -      +
    738F  ILE*     3.1    27.4    +      -       -      +
     44G  ILE*     3.6    29.4    -      -       +      -
    731I  ASN*     3.4    28.9    -      -       +      +
    734I  LEU*     3.9    30.1    -      -       +      -
    735I  GLN*     3.7    24.9    -      -       -      +
    738I  ILE*     3.5    23.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 735 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44D  ILE*     5.9     3.6    -      -       -      +
    731F  ASN*     2.9    22.7    +      -       -      +
    732F  PHE*     4.4     2.2    -      -       -      +
    734F  LEU*     1.3    73.7    -      -       -      +
    736F  ASP*     1.3    65.6    +      -       -      +
    737F  TYR      3.0     1.6    -      -       -      -
    738F  ILE*     3.2    11.6    +      -       +      +
    739F  ASP*     3.0    42.3    +      -       -      +
    734I  LEU*     4.1    21.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 736 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    732F  PHE      3.2    20.0    +      -       -      +
    733F  ARG*     4.0     4.7    -      -       -      +
    735F  GLN*     1.3    77.3    -      -       -      +
    737F  TYR*     1.3    61.8    +      -       -      +
    739F  ASP*     3.7     9.3    +      -       -      +
    740F  ARG*     3.3    22.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 737 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    733F  ARG      3.2    13.9    +      -       -      +
    734F  LEU      3.3     9.9    -      -       -      +
    735F  GLN      3.0     0.4    -      -       -      -
    736F  ASP*     1.3    76.0    -      -       -      +
    738F  ILE*     1.3    64.2    +      -       -      +
    740F  ARG*     3.2     6.5    +      -       +      +
    741F  ILE*     3.0    47.8    +      -       +      +
     44G  ILE*     3.7    33.8    +      -       +      -
     45G  GLY*     3.5    20.1    -      -       -      -
     46G  VAL      3.6     8.8    +      -       -      -
     47G  GLU*     5.4     7.9    -      -       +      +
    738I  ILE*     3.5    42.8    -      -       +      -
    741I  ILE*     6.0     1.3    -      -       +      -
    742I  ILE*     3.5    17.9    -      -       +      +
    753I  LEU*     4.7     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 738 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44D  ILE*     5.6     2.2    -      -       +      -
     45D  GLY*     4.4    10.8    -      -       -      +
    734F  LEU      3.1    15.6    +      -       -      +
    735F  GLN*     3.2    10.2    +      -       +      +
    737F  TYR*     1.3    77.5    -      -       -      +
    739F  ASP*     1.3    61.6    +      -       -      +
    741F  ILE*     3.5     5.3    +      -       -      +
    742F  ILE*     2.9    43.5    +      -       +      +
    734I  LEU*     3.6    32.5    -      -       +      +
    737I  TYR*     3.6    34.1    -      -       +      -
    738I  ILE*     3.5    30.3    -      -       +      -
    741I  ILE*     5.1     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 739 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76D  ILE*     2.9    43.1    -      -       +      +
    735F  GLN*     3.0    37.5    +      -       -      +
    736F  ASP*     3.8     8.6    -      -       -      +
    737F  TYR      3.2     0.2    -      -       -      -
    738F  ILE*     1.3    77.9    -      -       -      +
    740F  ARG*     1.3    67.4    +      -       -      +
    742F  ILE      3.1     1.0    +      -       -      -
    743F  VAL*     3.0    13.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 740 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    736F  ASP      3.3    14.1    +      -       -      +
    737F  TYR*     3.2     9.2    +      -       +      +
    739F  ASP*     1.3    80.1    -      -       -      +
    741F  ILE*     1.3    63.0    +      -       +      +
    743F  VAL*     3.3     9.6    +      -       -      +
    744F  ALA*     3.3    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 741 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    737F  TYR*     3.0    55.0    +      -       +      +
    738F  ILE*     3.9     3.6    -      -       -      +
    740F  ARG*     1.3    77.7    -      -       +      +
    742F  ILE*     1.3    59.4    +      -       -      +
    744F  ALA*     3.4     5.5    +      -       +      +
    745F  ILE*     2.9    35.0    +      -       +      +
    741I  ILE*     3.5    29.6    -      -       +      -
    742I  ILE*     4.9     1.6    -      -       +      -
    745I  ILE*     3.7    15.5    -      -       +      -
    752I  ILE*     4.3    14.6    -      -       +      +
    753I  LEU*     4.0    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 742 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45D  GLY*     4.7     4.7    -      -       -      -
     46D  VAL*     4.0    22.4    -      -       +      +
     76D  ILE*     3.5    30.3    -      -       +      -
    738F  ILE*     2.9    38.0    +      -       +      +
    739F  ASP      3.1     0.2    +      -       -      -
    741F  ILE*     1.3    78.1    -      -       +      +
    743F  VAL*     1.3    62.2    +      -       -      +
    745F  ILE*     3.2    10.3    +      -       +      +
    746F  MET*     3.2    33.0    +      -       +      +
    753F  LEU*     3.6    22.9    -      -       +      -
    737I  TYR*     3.3    28.7    -      -       +      +
    741I  ILE*     5.0     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 743 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76D  ILE*     3.3    35.9    -      -       +      +
     79D  ALA*     5.2     8.8    -      -       +      +
    739F  ASP*     3.0    16.5    +      -       +      +
    740F  ARG*     3.5    10.5    -      -       -      +
    742F  ILE*     1.3    77.5    -      -       -      +
    744F  ALA*     1.3    63.0    +      -       -      +
    746F  MET*     3.4     6.0    +      -       -      +
    747F  GLU*     3.1    22.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 744 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    740F  ARG      3.3     9.4    +      -       -      +
    741F  ILE*     3.6     9.9    -      -       +      +
    742F  ILE      3.3     0.2    -      -       -      -
    743F  VAL*     1.3    77.1    -      -       -      +
    745F  ILE*     1.3    66.6    +      -       -      +
    747F  GLU*     3.0    18.9    +      -       -      +
    748F  THR*     3.3    18.3    +      -       +      +
    752I  ILE*     3.9    23.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 745 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    741F  ILE*     2.9    29.7    +      -       +      +
    742F  ILE*     3.2    10.1    +      -       +      +
    744F  ALA*     1.3    76.6    -      -       -      +
    746F  MET*     1.3    57.7    +      -       -      +
    749F  ASN      3.1    43.4    +      -       -      +
    750F  PRO*     4.4     0.4    -      -       +      -
    752F  ILE*     3.8    17.3    -      -       +      -
    753F  LEU*     3.7    37.2    -      -       +      -
    741I  ILE*     4.5     9.2    -      -       +      -
    745I  ILE*     3.5    35.4    -      -       +      -
    752I  ILE*     4.3    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 746 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13D  LYS*     5.9     0.2    -      -       -      -
     46D  VAL*     3.5    27.8    -      -       +      -
     65D  TRP*     3.1    36.3    -      -       +      -
     76D  ILE*     4.4     7.0    -      -       +      -
     79D  ALA*     3.6    38.4    -      -       +      +
     80D  TYR*     4.4     8.5    -      -       -      -
     82D  ARG*     5.8     3.3    +      -       -      +
    742F  ILE*     3.2    15.7    +      -       +      +
    743F  VAL      3.7     7.6    -      -       -      +
    744F  ALA      3.1     0.6    -      -       -      -
    745F  ILE*     1.3    75.2    -      -       -      +
    747F  GLU*     1.3    62.6    +      -       -      +
    748F  THR      3.1     3.1    +      -       -      -
    750F  PRO*     3.3    25.3    -      -       +      +
    753F  LEU*     3.6    15.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 747 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82D  ARG*     5.6     7.2    -      -       -      +
    743F  VAL*     3.1    15.5    +      -       +      +
    744F  ALA*     3.0    14.2    +      -       -      +
    746F  MET*     1.3    76.4    -      -       -      +
    748F  THR*     1.3    63.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 748 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    744F  ALA*     3.3    14.2    +      -       +      +
    745F  ILE      3.9     3.3    +      -       -      -
    746F  MET      3.1     1.8    -      -       -      +
    747F  GLU*     1.3    87.8    -      -       +      +
    749F  ASN*     1.3    79.8    +      -       -      +
    750F  PRO*     3.5     9.8    -      -       -      +
    749I  ASN*     4.8     5.7    -      -       -      +
    752I  ILE*     4.2    22.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 749 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    745F  ILE*     3.1    11.4    +      -       -      +
    748F  THR*     1.3    89.4    +      -       -      +
    750F  PRO*     1.3    58.8    -      -       -      +
    751F  SER*     3.0    16.0    +      -       -      +
    752F  ILE*     3.3    30.4    -      -       +      +
    748I  THR*     5.0     3.4    -      -       -      +
    749I  ASN*     4.9    12.6    -      -       +      -
----------------------------------------------------------
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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