Contacts of the helix formed by residues 866 - 889 (chain A) in PDB entry 2WXJ


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 866 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    864A  PRO      3.3     0.8    +      -       -      -
    865A  GLY*     1.3    71.6    -      -       -      -
    867A  ALA*     1.3    62.5    +      -       -      +
    868A  LEU      3.2     1.6    +      -       -      -
    869A  ASP*     3.8    20.8    +      -       -      +
    870A  ARG*     4.5     2.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 867 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    863A  ASN*     3.9    22.8    -      -       +      +
    864A  PRO*     3.0    18.5    +      -       +      +
    866A  GLU*     1.3    76.0    -      -       -      +
    868A  LEU*     1.3    63.1    +      -       -      +
    869A  ASP      3.4     0.4    -      -       -      -
    870A  ARG*     3.4     9.6    +      -       -      +
    871A  ALA*     3.3    19.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 868 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    856A  LEU*     5.1     3.8    -      -       +      -
    859A  LEU*     4.3    11.0    -      -       +      +
    860A  LYS*     3.9    54.5    -      -       +      +
    863A  ASN*     3.3    20.8    +      -       +      +
    864A  PRO      5.2     0.2    -      -       -      -
    865A  GLY      3.5    11.0    +      -       -      +
    866A  GLU      3.2     0.6    -      -       -      -
    867A  ALA*     1.3    77.7    -      -       -      +
    869A  ASP*     1.3    67.1    +      -       -      +
    871A  ALA*     3.2     3.3    +      -       +      +
    872A  ILE*     3.0    45.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 869 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    866A  GLU*     3.8    15.9    +      -       -      +
    867A  ALA      3.4     0.2    -      -       -      -
    868A  LEU*     1.3    82.2    -      -       -      +
    870A  ARG*     1.3    62.4    +      -       -      +
    872A  ILE*     3.4    10.9    +      -       -      +
    873A  GLU*     3.1    21.1    +      -       -      +
    944A  GLN*     4.7    12.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 870 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267A  HIS*     4.3    19.1    +      -       -      -
    809A  ARG*     3.7    16.4    -      -       -      +
    866A  GLU      4.5     1.5    +      -       -      +
    867A  ALA*     3.4    10.7    +      -       -      +
    868A  LEU      3.3     0.6    -      -       -      -
    869A  ASP*     1.3    76.7    -      -       -      +
    871A  ALA*     1.3    61.4    +      -       -      +
    873A  GLU*     3.2    15.0    +      -       -      +
    874A  GLU*     2.5    62.6    +      -       +      +
    877A  LEU*     3.9    16.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 871 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    859A  LEU*     4.5     9.0    -      -       +      -
    863A  ASN*     3.6    35.2    -      -       +      +
    867A  ALA      3.3     4.2    +      -       -      +
    868A  LEU*     3.2    10.4    +      -       +      +
    870A  ARG*     1.3    79.0    -      -       -      +
    872A  ILE*     1.3    57.7    +      -       -      +
    874A  GLU*     3.2     3.3    +      -       -      +
    875A  PHE*     2.8    29.7    +      -       -      +
    904A  SER      3.3    22.7    -      -       -      +
    905A  GLY*     3.6     6.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 872 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    856A  LEU*     4.2    20.0    -      -       +      -
    859A  LEU*     4.6     3.4    -      -       +      -
    868A  LEU*     3.0    43.1    +      -       +      +
    869A  ASP*     3.8    12.3    -      -       -      +
    871A  ALA*     1.3    74.8    -      -       -      +
    873A  GLU*     1.3    63.5    +      -       -      +
    875A  PHE*     3.5     6.7    +      -       -      +
    876A  THR*     2.8    36.5    +      -       -      +
    941A  VAL*     3.6    26.2    -      -       +      +
    942A  ILE      4.3     7.4    -      -       -      +
    944A  GLN*     4.3    28.9    -      -       +      -
    952A  LYS*     5.8     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 873 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    869A  ASP      3.1    13.4    +      -       -      +
    870A  ARG*     3.2    22.4    +      -       -      +
    872A  ILE*     1.3    75.2    -      -       -      +
    874A  GLU*     1.3    66.0    +      -       -      +
    876A  THR*     3.2    10.3    +      -       -      +
    877A  LEU*     2.9    49.3    +      -       +      +
    952A  LYS*     5.7     5.0    -      -       -      +
    955A  ARG*     4.3     8.7    +      -       -      -
    959A  TYR*     2.7    35.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 874 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267A  HIS*     4.7     1.9    +      -       -      -
    809A  ARG*     2.8    42.0    +      -       -      +
    870A  ARG*     2.5    68.7    +      -       +      +
    871A  ALA      3.2     1.3    +      -       -      +
    873A  GLU*     1.3    75.8    -      -       -      +
    875A  PHE*     1.3    56.6    +      -       -      +
    877A  LEU*     3.5     1.2    +      -       -      +
    878A  SER*     2.9    33.6    +      -       -      -
    904A  SER*     3.5    28.0    +      -       -      +
    905A  GLY      4.2     1.6    -      -       -      -
    906A  GLN*     3.5    25.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 875 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    834A  ILE*     5.6     0.2    -      -       +      -
    855A  LEU*     4.1    16.6    -      -       +      -
    859A  LEU*     4.5     9.6    -      -       +      -
    871A  ALA      2.8    15.6    +      -       -      +
    872A  ILE*     3.7     8.5    -      -       -      +
    874A  GLU*     1.3    78.1    -      -       -      +
    876A  THR*     1.3    58.0    +      -       -      +
    878A  SER*     3.0     3.9    +      -       -      -
    879A  CYS*     2.9    36.6    +      -       +      +
    901A  ILE*     4.1    17.0    -      -       +      -
    905A  GLY      3.2    26.0    +      -       -      +
    907A  LEU*     3.8    19.7    -      -       +      -
    938A  PHE*     3.6    52.9    -      +       +      -
    941A  VAL*     3.6    24.7    -      -       +      -
    942A  ILE*     4.1    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 876 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    872A  ILE*     2.8    24.6    +      -       -      +
    873A  GLU*     3.7    11.9    +      -       -      +
    875A  PHE*     1.3    76.2    -      -       -      +
    877A  LEU*     1.3    68.5    +      -       -      +
    879A  CYS*     3.7     3.9    -      -       -      +
    880A  ALA*     3.1    23.6    +      -       -      +
    942A  ILE*     3.8    28.8    +      -       +      +
    952A  LYS      5.2     1.8    -      -       -      +
    955A  ARG*     6.1     0.4    -      -       +      -
    956A  PHE*     3.7    25.3    -      -       +      +
    959A  TYR*     3.8    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 877 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    806A  LEU*     5.4     3.1    -      -       +      -
    807A  ASP      4.0     8.7    -      -       -      +
    808A  LEU*     3.3    33.5    -      -       +      +
    809A  ARG*     3.9    28.9    -      -       +      -
    870A  ARG*     3.9    11.7    -      -       -      +
    873A  GLU*     2.9    42.5    +      -       +      +
    876A  THR*     1.3    78.6    -      -       -      +
    878A  SER*     1.3    63.3    +      -       -      +
    880A  ALA*     3.2     4.0    +      -       -      +
    881A  GLY      3.2    16.8    +      -       -      -
    959A  TYR*     3.7    32.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 878 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    808A  LEU      3.1    16.3    +      -       -      -
    809A  ARG      3.8    13.5    -      -       -      -
    810A  MET*     4.7     1.1    -      -       -      -
    874A  GLU      2.9    22.7    +      -       -      -
    875A  PHE*     3.0    10.4    +      -       -      -
    877A  LEU*     1.3    74.8    -      -       -      +
    879A  CYS*     1.3    61.6    +      -       -      +
    881A  GLY*     3.2     2.1    +      -       -      -
    882A  TYR*     3.0    31.9    +      -       -      -
    906A  GLN*     4.2     1.3    -      -       -      -
    907A  LEU*     2.8    42.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 879 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    875A  PHE*     2.9    25.1    +      -       +      +
    876A  THR*     3.7     5.6    -      -       -      +
    878A  SER*     1.3    78.0    +      -       -      +
    880A  ALA*     1.3    55.8    +      -       -      +
    882A  TYR*     3.9     0.9    -      -       -      +
    883A  CYS*     2.9    43.2    +      -       -      -
    907A  LEU*     3.8    22.9    -      -       +      -
    934A  LEU*     5.7     1.6    -      -       -      -
    938A  PHE*     3.9    34.1    -      -       -      -
    942A  ILE*     4.3     4.3    -      -       +      -
    956A  PHE*     4.0    18.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 880 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    808A  LEU*     4.6     3.8    -      -       +      -
    876A  THR      3.1    13.6    +      -       -      +
    877A  LEU      3.4     9.4    -      -       -      +
    879A  CYS*     1.3    72.7    -      -       -      +
    881A  GLY*     1.3    65.5    +      -       -      +
    883A  CYS*     3.4     1.5    +      -       -      +
    884A  VAL*     3.1    31.5    +      -       -      +
    956A  PHE*     3.5    17.8    -      -       +      -
    959A  TYR*     3.7    28.9    -      -       +      -
    960A  CYS*     3.8    12.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 881 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    801A  TRP*     3.6    13.0    -      -       -      -
    808A  LEU*     3.7    21.6    -      -       -      +
    810A  MET*     3.9    15.3    -      -       -      -
    877A  LEU      3.2     8.1    +      -       -      -
    878A  SER      3.2     3.5    +      -       -      -
    880A  ALA*     1.3    80.2    -      -       -      +
    882A  TYR*     1.3    56.5    +      -       -      +
    884A  VAL*     3.5     0.6    +      -       -      -
    885A  ALA*     2.9    30.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 882 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    791A  LEU*     6.2     2.7    -      -       +      -
    794A  ILE*     4.0    28.7    -      -       +      +
    810A  MET*     3.5    32.7    -      -       +      +
    811A  THR*     2.8    40.6    +      -       -      -
    813A  TYR*     6.5     0.7    -      +       -      -
    878A  SER*     3.0    27.8    +      -       -      +
    879A  CYS      4.4     2.2    -      -       -      +
    881A  GLY*     1.3    72.8    -      -       -      +
    883A  CYS*     1.3    61.1    +      -       -      +
    885A  ALA*     4.4     2.5    -      -       +      +
    886A  THR*     2.8    37.5    +      -       +      +
    907A  LEU*     3.1    29.4    -      -       +      -
    908A  PHE*     3.5     8.8    -      -       +      +
    909A  HIS*     3.3    49.8    -      +       +      +
    912A  PHE*     5.6     0.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with CYS 883 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    879A  CYS*     2.9    39.8    +      -       -      +
    880A  ALA*     3.8     6.1    -      -       -      +
    881A  GLY      3.3     0.4    -      -       -      -
    882A  TYR*     1.3    76.4    -      -       -      +
    884A  VAL*     1.3    59.1    +      -       -      +
    886A  THR*     3.1    16.3    +      -       -      -
    887A  TYR*     3.3    15.9    +      -       -      +
    909A  HIS*     6.3     0.7    -      -       -      -
    932A  PHE*     3.5    24.3    -      -       +      -
    933A  ILE*     3.5    24.7    +      -       -      +
    934A  LEU*     4.3    11.7    -      -       -      -
    935A  THR      6.2     0.2    -      -       -      -
    938A  PHE*     5.7     3.8    -      -       -      -
    956A  PHE*     4.5     1.3    -      -       -      -
    960A  CYS*     4.8     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 884 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    801A  TRP*     4.3     2.2    -      -       +      -
    880A  ALA      3.1    17.1    +      -       -      +
    881A  GLY      3.9     2.9    -      -       -      +
    883A  CYS*     1.3    75.4    -      -       -      +
    885A  ALA*     1.3    60.2    +      -       -      +
    887A  TYR*     3.2     3.6    +      -       +      +
    888A  VAL*     2.9    45.4    +      -       +      +
    932A  PHE*     4.2     9.9    -      -       +      -
    960A  CYS*     3.5    38.1    -      -       +      +
    963A  ALA*     4.1     9.6    -      -       +      -
    964A  TYR*     3.9    30.7    -      -       +      +
    967A  LEU*     4.2    11.9    -      -       +      -
   1015A  PHE*     4.6     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 885 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    794A  ILE*     4.0    26.2    -      -       +      -
    797A  MET*     3.4    32.7    -      -       -      -
    801A  TRP*     4.6     2.9    -      -       +      -
    810A  MET*     5.0     0.2    -      -       +      -
    881A  GLY      2.9    18.9    +      -       -      +
    882A  TYR*     4.2     5.2    -      -       -      +
    884A  VAL*     1.3    76.8    -      -       -      +
    886A  THR*     1.3    63.6    +      -       -      +
    888A  VAL      4.6     0.2    -      -       -      +
    889A  LEU*     3.1    32.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 886 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    794A  ILE*     5.7     1.6    -      -       +      -
    882A  TYR*     2.8    28.2    +      -       +      +
    883A  CYS*     3.1    12.6    +      -       -      -
    885A  ALA*     1.3    78.1    -      -       +      +
    887A  TYR*     1.3    57.0    +      -       -      +
    889A  LEU      3.7     0.2    +      -       -      -
    890A  GLY*     3.1     5.0    +      -       -      -
    891A  ILE*     2.9    61.1    +      -       +      +
    894A  ARG*     4.3    11.2    -      -       -      +
    909A  HIS*     3.9    31.9    -      -       +      +
    912A  PHE*     5.2     4.5    -      -       +      -
    930A  VAL*     4.9     0.3    -      -       -      +
    933A  ILE*     5.7     6.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 887 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    883A  CYS      3.3    15.2    +      -       -      +
    884A  VAL*     3.2     4.0    +      -       -      +
    885A  ALA      3.2     0.4    -      -       -      -
    886A  THR*     1.3    80.0    +      -       -      +
    888A  VAL*     1.3    75.4    +      -       +      +
    890A  GLY*     3.2    12.2    +      -       -      -
    929A  ARG*     4.3    21.6    +      -       -      -
    930A  VAL*     3.8    20.6    -      -       -      +
    931A  PRO      4.2     1.6    -      -       -      -
    932A  PHE*     3.7    47.6    -      +       +      +
    964A  TYR*     4.4     3.7    +      +       -      -
    997A  TYR*     4.4     0.7    +      -       -      -
   1000A  ASP      5.4     0.5    +      -       -      -
   1001A  SER*     4.1    27.3    +      -       -      -
   1014A  HIS*     4.4    10.9    +      -       -      -
   1015A  PHE*     4.0    25.3    -      +       -      -
   1018A  LYS*     3.4    34.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 888 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    797A  MET*     4.3    18.2    -      -       +      -
    884A  VAL*     2.9    35.2    +      -       +      +
    885A  ALA      4.1     2.7    -      -       -      +
    887A  TYR*     1.3    80.5    -      -       +      +
    889A  LEU*     1.3    60.0    +      -       -      +
    890A  GLY      3.5     0.3    +      -       -      -
    964A  TYR*     4.2    18.4    -      -       +      -
    967A  LEU*     4.1    10.3    -      -       +      -
    974A  PHE*     6.2     2.5    -      -       +      -
    997A  TYR*     4.3     3.6    -      -       -      -
    998A  LEU*     3.4    20.7    -      -       +      +
   1001A  SER*     2.8    34.9    +      -       -      +
   1002A  LEU*     3.7    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 889 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    790A  THR*     4.3    18.6    -      -       +      -
    793A  MET*     4.4    11.7    -      -       +      -
    794A  ILE*     4.1    21.1    -      -       +      -
    797A  MET*     4.0    24.7    -      -       +      -
    885A  ALA      3.1    19.8    +      -       -      +
    888A  VAL*     1.3    76.3    -      -       -      +
    890A  GLY*     1.3    52.6    +      -       -      +
    891A  ILE*     3.4    15.7    -      -       +      -
    915A  PHE*     3.4    10.3    -      -       +      +
    916A  LEU*     2.6    39.9    +      -       +      +
    974A  PHE*     5.6     2.0    -      -       +      -
    978A  PHE*     4.0    28.9    -      -       +      -
    997A  TYR*     4.3     0.7    -      -       -      -
    998A  LEU*     4.4    13.2    -      -       +      -
----------------------------------------------------------
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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