Contacts of the helix formed by residues 801 - 824 (chain A) in PDB entry 2WK3


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 SER 801 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    799A  MET*     3.6     5.8    +      -       -      -
    800A  GLN*     1.3    77.6    -      -       -      +
    802A  THR*     1.3    69.1    +      -       -      +
    803A  SER*     2.8    14.0    +      -       -      -
    804A  GLU*     3.7    12.8    +      -       -      +
    805A  ASN*     2.8    33.1    +      -       -      +
    844A  GLN*     4.2     0.4    -      -       -      +
    920A  ARG*     5.9     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 802 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    801A  SER*     1.3    76.4    +      -       -      +
    803A  SER*     1.3    60.6    +      -       -      +
    805A  ASN*     3.8     0.7    -      -       -      +
    806A  MET*     3.3    24.1    +      -       -      +
    917A  ASN*     5.2     5.5    +      -       -      -
    920A  ARG*     6.0     0.2    -      -       -      +
    923A  THR*     4.1    20.2    -      -       +      +
    924A  GLU*     4.3    23.3    +      -       +      +
    927A  TYR*     3.9    32.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 803 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    801A  SER*     2.8     9.1    +      -       -      -
    802A  THR*     1.3    74.5    -      -       -      +
    804A  GLU*     1.3    76.7    +      -       -      +
    805A  ASN      3.2     1.3    -      -       -      -
    806A  MET*     3.3     1.9    +      -       -      +
    807A  PHE*     3.0    38.1    +      -       -      -
    927A  TYR*     3.3    34.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 804 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    797A  THR*     4.1     9.7    +      -       -      -
    798A  ASP*     3.9    29.0    -      -       +      +
    799A  MET      3.7    15.0    -      -       -      +
    801A  SER*     3.3     8.9    +      -       -      +
    803A  SER*     1.3    86.7    +      -       -      +
    805A  ASN*     1.3    61.6    +      -       -      +
    807A  PHE*     3.8    19.4    -      -       -      +
    808A  LEU*     3.2    22.5    +      -       -      +
    844A  GLN*     3.3    20.0    +      -       -      +
    939A  PHE*     4.0    18.6    -      -       -      -
    943A  MET*     5.1     5.7    -      -       -      +
    950A  ARG*     5.1     7.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 805 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    800A  GLN*     3.3    14.6    -      -       -      +
    801A  SER      2.8    36.5    +      -       -      +
    802A  THR      3.8     3.4    -      -       -      +
    804A  GLU*     1.3    77.4    -      -       -      +
    806A  MET*     1.3    65.2    +      -       -      +
    808A  LEU      3.8     0.2    -      -       -      -
    809A  GLU*     2.8    35.3    +      -       -      +
    839A  ARG*     3.8    15.5    +      -       -      +
    844A  GLN*     2.8    27.9    +      -       -      +
    920A  ARG*     3.5    11.1    +      -       -      -
    924A  GLU*     2.8    26.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 806 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    802A  THR      3.3    18.3    +      -       -      +
    803A  SER      3.3     0.9    +      -       -      +
    805A  ASN*     1.3    80.6    -      -       -      +
    807A  PHE*     1.3    66.3    +      -       -      +
    809A  GLU*     4.0     5.3    -      -       +      +
    810A  LEU*     3.0    25.5    +      -       -      +
    889A  LEU*     3.6    30.3    -      -       +      -
    893A  ARG*     3.6    32.5    -      -       +      +
    924A  GLU*     3.4    39.3    -      -       +      +
    925A  VAL*     5.0     2.0    -      -       +      +
    927A  TYR*     3.9    18.4    -      -       +      -
    928A  LEU*     3.7    19.3    -      -       +      +
    931A  LEU*     4.3     9.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 807 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    803A  SER*     3.0    32.5    +      -       -      +
    804A  GLU*     3.8    20.0    -      -       -      +
    806A  MET*     1.3    78.5    -      -       -      +
    808A  LEU*     1.3    62.5    +      -       -      +
    810A  LEU*     3.8     2.1    -      -       -      +
    811A  PHE*     3.1    23.2    +      -       -      +
    927A  TYR*     3.7    23.6    -      -       -      -
    931A  LEU*     3.9    24.9    -      -       +      -
    935A  ASP*     4.4    18.6    -      -       +      -
    936A  ILE*     3.9    16.3    -      -       +      +
    939A  PHE*     3.6    41.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with LEU 808 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    797A  THR*     4.6    11.2    -      -       +      +
    804A  GLU      3.2    14.7    +      -       -      +
    805A  ASN      3.8     2.7    -      -       -      +
    807A  PHE*     1.3    77.5    -      -       -      +
    809A  GLU*     1.3    57.5    +      -       -      +
    811A  PHE*     3.5     3.4    +      -       +      +
    812A  ALA*     3.0    28.2    +      -       -      +
    837A  PRO*     4.0    11.7    -      -       +      -
    839A  ARG*     4.0     9.0    -      -       -      +
    844A  GLN*     3.2    31.9    -      -       +      +
    845A  GLY*     3.3    44.4    -      -       -      +
    846A  LEU*     3.9    21.1    -      -       +      +
    939A  PHE*     3.9    15.8    -      -       +      -
    944A  LEU*     6.0     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 809 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    805A  ASN*     2.8    26.3    +      -       -      +
    806A  MET*     4.0     7.4    -      -       +      +
    807A  PHE      3.3     0.2    -      -       -      -
    808A  LEU*     1.3    74.0    -      -       -      +
    810A  LEU*     1.3    56.0    +      -       -      +
    812A  ALA*     3.1     6.9    +      -       -      +
    813A  GLN*     2.8    28.2    +      -       -      +
    837A  PRO*     4.3    15.0    -      -       +      -
    839A  ARG*     2.7    36.5    +      -       -      +
    889A  LEU*     3.9    21.5    -      -       +      +
    893A  ARG*     2.7    44.6    +      -       -      +
    924A  GLU*     4.5     1.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 810 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    806A  MET      3.0    17.6    +      -       -      +
    807A  PHE      3.8     2.5    -      -       -      +
    809A  GLU*     1.3    72.4    -      -       -      +
    811A  PHE*     1.3    68.2    +      -       -      +
    813A  GLN*     3.2     6.4    +      -       +      -
    814A  ILE*     3.0    26.9    +      -       +      +
    882A  PHE*     3.6    24.7    -      -       +      +
    885A  HIS*     4.1    37.2    -      -       +      +
    886A  ILE*     4.2    12.6    -      -       +      +
    889A  LEU*     4.1     5.5    -      -       +      +
    928A  LEU*     3.6    18.6    -      -       +      -
    931A  LEU*     4.7     6.1    -      -       +      -
    936A  ILE*     3.6    29.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 811 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    807A  PHE      3.1    14.9    +      -       -      +
    808A  LEU*     3.8     4.5    -      -       +      +
    810A  LEU*     1.3    81.4    -      -       -      +
    812A  ALA*     1.3    62.5    +      -       -      +
    814A  ILE*     3.2     6.9    +      -       -      +
    815A  ILE*     3.1    61.9    +      -       +      +
    846A  LEU*     4.0    14.1    -      -       +      -
    867A  LEU*     4.5     9.6    -      -       +      -
    870A  MET*     4.8     4.9    -      -       +      -
    874A  ILE*     4.0    23.1    -      -       +      -
    936A  ILE*     4.0    21.3    -      -       +      +
    939A  PHE*     4.3    12.1    -      +       +      -
    940A  TYR*     3.8    31.2    -      +       +      -
    944A  LEU*     3.6    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 812 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    808A  LEU      3.0    18.7    +      -       -      +
    809A  GLU      3.1     5.1    +      -       -      +
    811A  PHE*     1.3    75.0    -      -       -      +
    813A  GLN*     1.3    64.5    +      -       -      +
    815A  ILE*     3.2    11.4    +      -       -      +
    816A  SER*     2.9    27.1    +      -       -      -
    835A  SER*     5.3     0.3    +      -       -      -
    836A  GLY*     4.2    12.1    -      -       -      -
    837A  PRO*     4.1    28.9    -      -       +      -
    846A  LEU*     4.8     5.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 813 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  SER*     3.1    31.6    +      -       -      +
    809A  GLU      2.8    13.6    +      -       -      +
    810A  LEU*     3.2    10.1    +      -       +      +
    812A  ALA*     1.3    80.1    -      -       -      +
    814A  ILE*     1.3    63.0    +      -       -      +
    815A  ILE      3.3     0.3    +      -       -      -
    816A  SER*     3.4    16.0    +      -       -      -
    817A  GLU      4.8     0.7    +      -       -      -
    885A  HIS*     2.9    54.8    +      -       +      +
    888A  ALA*     3.8    10.8    -      -       -      +
    889A  LEU*     4.2    14.5    +      -       +      -
    892A  ARG*     3.2    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 814 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    810A  LEU*     3.0    27.2    +      -       +      +
    811A  PHE*     3.7     5.4    -      -       -      +
    812A  ALA      3.2     0.2    -      -       -      -
    813A  GLN*     1.3    77.1    -      -       -      +
    815A  ILE*     1.3    62.8    +      -       +      +
    818A  PRO*     3.5    18.5    -      -       -      +
    870A  MET*     3.7    18.1    -      -       +      +
    874A  ILE*     4.1    30.1    -      -       +      -
    877A  MET*     4.1    15.3    -      -       +      -
    882A  PHE*     4.3    28.3    -      -       +      -
    885A  HIS*     3.8    36.3    +      -       +      +
    936A  ILE*     4.6     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 815 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    811A  PHE*     3.1    54.4    +      -       +      +
    812A  ALA*     3.2     7.4    +      -       -      +
    814A  ILE*     1.3    86.2    -      -       +      +
    816A  SER*     1.3    66.1    +      -       -      +
    817A  GLU      3.5     0.9    -      -       -      -
    818A  PRO*     3.6     4.0    -      -       -      -
    819A  ALA*     2.8    25.3    +      -       -      +
    835A  SER*     4.3    11.4    -      -       -      +
    846A  LEU*     4.0    14.6    -      -       +      -
    848A  PHE*     4.0    27.6    -      -       +      -
    866A  PHE*     4.2     4.9    -      -       +      -
    867A  LEU*     4.9     0.9    -      -       +      -
    870A  MET*     3.5    35.4    -      -       +      -
    874A  ILE*     5.2     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 816 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  SER*     4.8     5.4    -      -       -      -
    812A  ALA      2.9    17.0    +      -       -      -
    813A  GLN*     3.6    13.7    -      -       -      -
    814A  ILE      3.3     1.8    -      -       -      -
    815A  ILE*     1.3    80.7    -      -       -      +
    817A  GLU*     1.3    62.6    +      -       -      +
    819A  ALA*     3.6     3.6    +      -       -      +
    820A  PHE*     3.5    16.3    +      -       -      +
    835A  SER*     4.3    15.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 817 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125A  ASN*     3.4    23.1    -      -       -      +
    128A  SER*     3.4    22.8    +      -       -      +
    129A  GLN*     3.8    27.5    -      -       +      +
    132A  SER*     3.6    32.9    +      -       -      +
    813A  GLN      4.8     0.6    +      -       -      -
    816A  SER*     1.3    76.5    -      -       -      +
    818A  PRO*     1.3    89.6    -      -       +      +
    820A  PHE*     3.0    10.3    +      -       +      +
    821A  ASN*     2.7    33.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 818 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  SER*     5.7     0.2    -      -       -      +
    814A  ILE      3.5    24.7    -      -       -      +
    815A  ILE      3.5     2.9    -      -       -      +
    817A  GLU*     1.3   106.5    -      -       +      +
    819A  ALA*     1.3    63.1    +      -       -      +
    821A  ASN*     4.2     4.5    -      -       +      -
    822A  THR*     2.8    32.0    +      -       -      +
    866A  PHE*     3.6     4.9    -      -       +      -
    870A  MET*     3.7    30.1    -      -       +      -
    885A  HIS*     6.1     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 819 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    815A  ILE*     2.8    23.7    +      -       +      +
    816A  SER      3.8     2.9    -      -       -      +
    817A  GLU      3.2     0.2    -      -       -      -
    818A  PRO*     1.3    72.7    -      -       -      +
    820A  PHE*     1.3    57.1    +      -       -      +
    823A  LEU*     2.9    46.5    +      -       +      +
    833A  VAL*     4.6     4.7    -      -       +      -
    835A  SER*     3.8    25.6    -      -       -      +
    848A  PHE*     4.5     0.4    -      -       +      -
    866A  PHE*     3.3    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 820 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128A  SER*     5.7     7.0    -      -       -      -
    816A  SER      3.5     9.4    +      -       -      +
    817A  GLU*     3.0    12.4    +      -       +      +
    819A  ALA*     1.3    81.0    -      -       -      +
    821A  ASN*     1.3    65.0    +      -       -      +
    824A  ARG*     3.0    72.1    +      -       +      +
    825A  THR*     3.2    24.0    +      -       -      -
    831A  TYR      4.9     2.9    -      -       -      -
    833A  VAL*     4.1    27.1    -      -       +      +
     20C  PHE*     4.3    23.8    -      +       -      -
     21C  ALA*     4.5    16.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 821 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  GLU*     4.6     5.5    +      -       -      +
    125A  ASN*     3.4    37.0    -      -       -      +
    128A  SER*     5.5     0.6    +      -       -      +
    817A  GLU*     2.7    30.6    +      -       -      +
    818A  PRO*     3.8     6.7    -      -       +      +
    820A  PHE*     1.3    76.5    -      -       +      +
    822A  THR*     1.3    53.4    +      -       -      +
    825A  THR*     3.0    30.1    +      -       -      +
    826A  LYS*     2.7    55.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 822 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    818A  PRO*     2.8    21.1    +      -       -      +
    819A  ALA      4.0     0.2    -      -       -      -
    821A  ASN*     1.3    78.2    +      -       -      +
    823A  LEU*     1.3    67.3    +      -       +      +
    824A  ARG      3.2     0.2    -      -       -      -
    826A  LYS*     3.6    23.4    +      -       -      +
    827A  GLU*     2.9    52.7    +      -       +      +
    866A  PHE*     3.7    32.5    -      -       +      -
    869A  THR*     5.9     5.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 823 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    819A  ALA*     2.9    28.4    +      -       +      +
    822A  THR*     1.3    83.9    -      -       +      +
    824A  ARG*     1.3    58.1    +      -       -      +
    827A  GLU*     4.4     5.2    -      -       -      +
    828A  GLN      3.5     1.1    +      -       -      -
    829A  LEU*     2.9    53.5    +      -       +      +
    833A  VAL*     3.9    19.9    -      -       +      +
    848A  PHE*     4.4     9.9    -      -       +      -
    850A  ILE*     4.6     7.4    -      -       +      -
    862A  ARG*     3.8    28.0    -      -       +      +
    863A  VAL*     4.4    14.8    -      -       +      +
    866A  PHE*     3.9    29.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 824 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112A  HIS*     3.9     4.2    -      -       -      -
    182A  GLU*     3.1    25.4    +      -       -      -
    185A  ALA*     4.0    11.9    -      -       -      +
    820A  PHE*     3.0    45.9    +      -       +      +
    823A  LEU*     1.3    78.7    -      -       -      +
    825A  THR*     1.3    63.5    +      -       -      +
    826A  LYS      3.4     0.9    -      -       -      -
    828A  GLN*     2.5    44.5    +      -       -      +
    829A  LEU      4.3     0.4    -      -       -      +
    830A  GLY      3.5    19.1    -      -       -      +
    831A  TYR*     3.2    35.9    +      -       -      +
    833A  VAL*     3.8    18.8    -      -       +      -
     20C  PHE*     2.9    46.7    +      -       -      -
     21C  ALA*     4.3     2.6    -      -       -      +
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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