Contacts of the helix formed by residues 885 - 912 (chain A) in PDB entry 4C3I


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 ASP 885 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    881A  GLU      3.7     3.6    +      -       -      +
    882A  ILE      2.9    20.1    +      -       -      +
    883A  LEU      4.6     1.6    -      -       -      -
    884A  ARG*     1.3    79.1    -      -       -      +
    886A  ASN*     1.3    62.4    +      -       -      +
    887A  ASN*     3.3    15.9    +      -       -      +
    888A  LYS*     3.0    59.2    +      -       +      +
    889A  SER*     3.1    18.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 886 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    884A  ARG      4.2     1.4    +      -       -      -
    885A  ASP*     1.3    73.7    +      -       -      +
    887A  ASN*     1.3    62.5    +      -       -      +
    889A  SER*     4.7     0.4    -      -       -      -
    890A  GLY      3.4     1.6    +      -       -      -
    955A  ARG*     2.8    53.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 887 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    885A  ASP*     3.3    13.9    +      -       -      +
    886A  ASN*     1.3    79.8    -      -       -      +
    888A  LYS*     1.4    69.4    +      -       -      +
    890A  GLY*     3.0    12.9    +      -       -      -
    891A  ILE*     3.2    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 888 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    861A  VAL*     4.7     2.8    -      -       -      +
    881A  GLU*     3.6    47.3    -      -       +      +
    882A  ILE*     3.5    28.3    -      -       +      +
    885A  ASP*     3.0    34.5    +      -       +      +
    887A  ASN*     1.4    77.7    -      -       -      +
    889A  SER*     1.4    61.1    +      -       -      +
    891A  ILE*     3.3    12.6    +      -       +      +
    892A  LEU*     3.2    17.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 889 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    882A  ILE*     2.7    31.7    +      -       -      +
    883A  LEU*     3.8    11.4    +      -       -      +
    885A  ASP      3.1    13.6    +      -       -      -
    887A  ASN      3.3     0.2    -      -       -      -
    888A  LYS*     1.4    74.4    -      -       -      +
    890A  GLY*     1.3    53.5    +      -       -      +
    892A  LEU*     3.3     5.8    +      -       -      +
    893A  ASP*     2.8    41.2    +      -       -      +
    955A  ARG*     3.3    22.2    -      -       -      -
    959A  VAL*     5.6     4.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 890 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    886A  ASN      3.4     5.4    +      -       -      -
    887A  ASN*     3.0     9.4    +      -       -      -
    889A  SER*     1.3    76.0    -      -       -      +
    891A  ILE*     1.4    60.3    +      -       -      +
    893A  ASP*     3.4     4.0    +      -       -      +
    894A  ALA*     3.0    32.8    +      -       -      +
    955A  ARG*     3.4    24.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 891 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    861A  VAL*     4.1    16.6    -      -       +      -
    887A  ASN*     3.2    37.2    +      -       -      +
    888A  LYS*     3.3    10.3    +      -       +      +
    890A  GLY*     1.4    73.8    -      -       -      +
    892A  LEU*     1.4    62.8    +      -       -      +
    894A  ALA*     3.7     3.7    +      -       -      +
    895A  VAL*     3.2    39.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 892 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    858A  ALA*     4.1    28.3    -      -       +      +
    861A  VAL*     3.8    22.3    -      -       +      +
    879A  LEU*     4.2    19.5    -      -       +      -
    882A  ILE*     3.8    31.6    -      -       +      -
    888A  LYS      3.2     5.4    +      -       -      +
    889A  SER*     3.3     9.6    +      -       -      +
    891A  ILE*     1.4    72.5    -      -       -      +
    893A  ASP*     1.3    64.2    +      -       -      +
    895A  VAL*     4.1     1.2    -      -       -      +
    896A  THR*     2.7    36.9    +      -       -      +
    956A  ARG*     3.8    22.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 893 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    889A  SER*     2.8    24.5    +      -       -      +
    890A  GLY*     3.8     4.7    -      -       -      +
    892A  LEU*     1.3    77.4    -      -       -      +
    894A  ALA*     1.4    56.2    +      -       -      +
    896A  THR*     3.9     1.0    -      -       -      -
    897A  SER*     2.9    36.8    +      -       -      -
    955A  ARG*     3.4    37.0    +      -       +      +
    956A  ARG*     2.9    53.7    +      -       +      +
    957A  VAL      5.3     2.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 894 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    890A  GLY      3.0    18.6    +      -       -      +
    891A  ILE*     4.1     4.3    -      -       -      +
    893A  ASP*     1.4    75.8    -      -       -      +
    895A  VAL*     1.4    62.9    +      -       +      +
    897A  SER*     4.0     5.1    -      -       -      -
    898A  SER*     3.2    24.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 895 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    857A  ALA*     4.0     9.0    -      -       +      +
    860A  GLU*     3.7    23.8    -      -       -      +
    861A  VAL*     3.7    25.4    -      -       +      -
    891A  ILE*     3.2    27.6    +      -       +      +
    892A  LEU      4.1     0.2    -      -       -      +
    893A  ASP      3.3     0.2    -      -       -      -
    894A  ALA*     1.4    73.7    -      -       +      +
    896A  THR*     1.4    63.2    +      -       -      +
    898A  SER*     2.7    22.6    +      -       -      +
    899A  LYS*     3.2    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 896 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    853A  THR*     4.8     0.9    -      -       +      +
    854A  GLY*     4.5    20.0    -      -       -      +
    857A  ALA*     3.5    28.2    -      -       +      +
    858A  ALA*     4.7     0.7    +      -       -      +
    892A  LEU*     2.7    31.9    +      -       -      +
    893A  ASP      4.0     2.0    -      -       -      -
    895A  VAL*     1.4    75.2    -      -       -      +
    897A  SER*     1.4    56.6    +      -       -      +
    899A  LYS*     3.4     2.8    +      -       -      +
    900A  VAL*     3.0    40.8    +      -       +      +
    949A  GLN*     5.8     0.7    -      -       -      +
    956A  ARG*     3.5    32.5    +      -       -      +
    976A  ALA*     5.4     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 897 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    893A  ASP      2.9    24.6    +      -       -      -
    894A  ALA*     4.0     5.8    -      -       -      -
    896A  THR*     1.4    74.9    -      -       -      +
    898A  SER*     1.4    53.2    +      -       -      +
    900A  VAL*     3.2    10.6    +      -       -      +
    901A  ASN*     2.8    51.7    +      -       -      +
    949A  GLN*     3.9     9.9    -      -       -      +
    955A  ARG      5.2     2.6    -      -       -      -
    956A  ARG*     3.4    21.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 898 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    894A  ALA      3.2    13.6    +      -       -      -
    895A  VAL*     2.7    23.9    +      -       -      +
    897A  SER*     1.4    76.9    -      -       -      +
    899A  LYS*     1.3    58.7    +      -       -      +
    901A  ASN*     4.0     6.9    -      -       -      +
    902A  ALA*     3.2    26.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 899 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    853A  THR*     3.7    21.7    -      -       +      +
    856A  GLU*     5.0     6.3    -      -       +      -
    857A  ALA*     3.8    24.5    -      -       +      +
    860A  GLU*     3.0    37.1    +      -       -      -
    895A  VAL*     3.2    25.9    +      -       -      +
    896A  THR*     3.7     3.8    -      -       -      +
    898A  SER*     1.3    81.9    +      -       -      +
    900A  VAL*     1.4    63.0    +      -       -      +
    902A  ALA*     3.4    14.0    -      -       -      +
    903A  ILE*     3.4    18.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 900 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    850A  SER*     5.1     0.7    -      -       -      +
    853A  THR*     3.8    18.6    -      -       +      -
    854A  GLY      5.3     0.2    -      -       -      +
    896A  THR*     3.0    30.7    +      -       +      +
    897A  SER*     3.3    15.7    -      -       -      +
    899A  LYS*     1.4    73.3    -      -       -      +
    901A  ASN*     1.4    57.7    +      -       -      +
    903A  ILE*     3.1     8.8    +      -       +      +
    904A  THR*     3.0    28.9    +      -       -      -
    949A  GLN*     3.9    19.1    -      -       +      +
    976A  ALA*     3.8    28.9    -      -       +      -
    981A  TYR*     3.3    32.3    +      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 901 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    897A  SER*     2.8    40.4    +      -       -      +
    898A  SER*     4.0     7.6    -      -       -      +
    900A  VAL*     1.4    71.7    -      -       -      +
    902A  ALA*     1.3    58.2    +      -       -      +
    903A  ILE      3.3     0.2    -      -       -      -
    904A  THR*     3.4    11.1    +      -       -      +
    905A  SER*     2.9    29.3    +      -       -      -
    948A  GLY*     5.5     0.2    -      -       -      -
    949A  GLN*     3.7    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 902 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    898A  SER      3.2    14.9    +      -       -      +
    899A  LYS*     3.4    13.9    -      -       -      +
    900A  VAL      3.2     0.4    -      -       -      -
    901A  ASN*     1.3    74.9    -      -       -      +
    903A  ILE*     1.4    62.6    +      -       +      +
    905A  SER*     2.7    21.8    +      -       -      -
    906A  GLN*     3.2    26.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 903 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    846A  ILE*     3.7    29.2    -      -       +      +
    847A  LEU*     4.7     2.5    -      -       -      -
    849A  THR*     4.0    14.6    -      -       -      +
    850A  SER*     4.0    14.8    -      -       -      -
    853A  THR*     4.1    20.6    -      -       +      +
    899A  LYS      3.4    16.2    -      -       -      +
    900A  VAL*     3.1    12.0    +      -       -      +
    902A  ALA*     1.4    76.6    -      -       +      +
    904A  THR*     1.4    62.1    +      -       -      +
    906A  GLN*     3.4    25.8    +      -       -      +
    907A  VAL*     3.2    27.9    +      -       +      +
    981A  TYR*     3.9    11.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 904 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    900A  VAL      3.0    14.4    +      -       -      -
    901A  ASN*     3.3    17.0    +      -       -      +
    903A  ILE*     1.4    73.9    -      -       -      +
    905A  SER*     1.4    62.6    +      -       -      +
    907A  VAL*     3.0    15.0    +      -       -      +
    908A  VAL*     3.1    25.1    +      -       +      +
    946A  LEU*     3.8    28.7    -      -       +      +
    947A  LEU      5.5     0.2    -      -       -      -
    948A  GLY*     4.2    10.2    -      -       -      -
    981A  TYR*     3.0    25.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 905 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    901A  ASN      2.9    13.3    +      -       -      -
    902A  ALA*     2.7    28.1    +      -       -      -
    904A  THR*     1.4    74.6    -      -       -      +
    906A  GLN*     1.4    56.7    +      -       -      +
    908A  VAL*     3.5     7.6    +      -       -      +
    909A  SER*     2.9    32.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 906 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    846A  ILE*     3.8    22.8    -      -       +      +
    849A  THR*     5.4     0.7    +      -       -      -
    902A  ALA*     3.2    25.3    +      -       -      +
    903A  ILE*     3.4    27.6    -      -       -      +
    904A  THR      3.2     0.8    -      -       -      -
    905A  SER*     1.4    78.7    +      -       -      +
    907A  VAL*     1.4    65.3    +      -       -      +
    909A  SER*     3.4     5.6    +      -       -      -
    910A  LYS*     3.1    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 907 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    843A  ARG*     4.0    24.2    -      -       +      +
    846A  ILE*     3.7    29.6    -      -       +      +
    847A  LEU*     4.0    25.1    -      -       +      -
    903A  ILE      3.2    15.7    -      -       -      +
    904A  THR      3.0     6.7    +      -       -      +
    906A  GLN*     1.4    74.8    -      -       -      +
    908A  VAL*     1.4    54.3    +      -       -      +
    910A  LYS*     3.8     0.3    -      -       -      +
    911A  CYS*     2.9    44.6    +      -       -      +
    945A  CYS*     3.9    14.4    -      -       +      -
    946A  LEU*     3.8    20.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 908 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    904A  THR*     3.1    30.0    +      -       +      +
    905A  SER*     3.8     6.3    -      -       -      +
    907A  VAL*     1.4    74.0    -      -       -      +
    909A  SER*     1.4    57.1    +      -       -      +
    912A  VAL*     2.9    39.3    +      -       +      +
    937A  ASN*     5.0     5.6    -      -       +      +
    941A  SER*     3.7    36.6    -      -       -      +
    945A  CYS*     4.3    16.4    -      -       +      -
    946A  LEU*     4.7     2.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 909 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    905A  SER      2.9    19.4    +      -       -      -
    906A  GLN*     3.8     6.1    -      -       -      -
    908A  VAL*     1.4    76.5    -      -       -      +
    910A  LYS*     1.3    62.2    +      -       -      +
    912A  VAL      3.7    11.3    -      -       -      +
    913A  PRO*     5.3     0.7    -      -       -      +
    914A  ASP*     5.2     4.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 910 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    842A  TRP*     3.6    71.0    -      -       +      +
    846A  ILE*     3.8    16.6    -      -       +      -
    906A  GLN      3.1    17.6    +      -       -      +
    909A  SER*     1.3    79.8    -      -       -      +
    911A  CYS*     1.3    62.4    +      -       -      +
    912A  VAL      3.7     0.2    +      -       -      -
    914A  ASP*     3.9    13.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 911 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    835A  LEU*     4.2    10.5    -      -       +      -
    839A  GLY      3.4    23.3    -      -       -      +
    842A  TRP*     4.1     8.5    -      -       -      -
    843A  ARG*     3.7    30.3    -      -       -      -
    846A  ILE*     5.1     0.2    -      -       -      -
    907A  VAL*     2.9    26.4    +      -       -      +
    910A  LYS*     1.3    75.5    -      -       -      +
    912A  VAL*     1.3    58.8    +      -       -      +
    915A  GLY*     2.9    28.9    +      -       -      +
    916A  THR*     3.4    10.4    +      -       -      +
    945A  CYS*     3.8    16.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 912 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    759A  TYR*     5.6     1.3    -      -       -      +
    835A  LEU*     5.1     0.7    -      -       +      -
    908A  VAL*     2.9    27.8    +      -       +      +
    909A  SER*     3.7    12.3    -      -       -      +
    910A  LYS      4.7     0.2    -      -       -      -
    911A  CYS*     1.3    81.0    -      -       -      +
    913A  PRO*     1.4    67.5    -      -       +      +
    914A  ASP      3.7     0.7    -      -       -      -
    916A  THR*     4.1    12.6    -      -       +      -
    926A  GLN*     3.9    16.2    -      -       -      +
    937A  ASN*     5.1    16.6    -      -       +      +
    940A  VAL*     4.3    23.6    -      -       +      -
    941A  SER*     5.1     4.3    -      -       -      -
    944A  MET*     4.8     6.7    -      -       +      -
    945A  CYS*     3.8    23.6    -      -       -      -
----------------------------------------------------------
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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