Contacts of the helix formed by residues 837 - 858 (chain A) in PDB entry 3ZW3


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 837 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    705A  GLN*     4.4     3.6    -      -       -      +
    836A  ASP*     1.3    69.6    -      -       -      +
    838A  LEU*     1.3    56.8    +      -       -      +
    839A  ARG*     3.1    53.3    +      -       -      +
    840A  GLN*     3.2    51.2    +      -       -      +
    841A  ASP*     3.6     6.6    -      -       -      +
    871A  SER*     4.8     0.7    +      -       -      -
    875A  LYS*     3.6    27.8    +      -       +      +
    966A  GLY*     4.0     6.5    +      -       -      -
   1038A  GLY      4.1     6.4    -      -       -      +
   1040A  PRO*     5.6     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 838 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    833A  LYS*     4.3    22.4    -      -       +      +
    836A  ASP*     3.2    13.0    +      -       +      +
    837A  ASP*     1.3    69.0    +      -       -      +
    839A  ARG*     1.3    58.1    +      -       -      +
    840A  GLN      3.2     2.0    -      -       -      -
    841A  ASP*     3.3    27.5    +      -       -      +
    842A  MET*     2.9    31.7    +      -       -      +
    869A  CYS*     4.1    18.4    -      -       -      -
    870A  ILE      4.6     0.2    -      -       -      +
    871A  SER*     4.1    19.1    +      -       -      +
    875A  LYS*     5.4     0.8    -      -       -      +
    876A  ILE      4.1     1.8    -      -       -      +
    877A  GLY*     3.5    44.4    -      -       -      +
    878A  MET      4.1     1.3    -      -       -      +
    879A  ILE*     4.3    22.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 839 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    668A  LYS*     5.5     1.4    -      -       -      +
    701A  SER*     3.7     7.6    -      -       -      +
    702A  GLU*     3.2    36.0    +      -       -      +
    705A  GLN*     3.2    47.1    +      -       -      +
    706A  SER*     4.8     3.4    -      -       -      -
    837A  ASP*     3.1    30.1    +      -       -      +
    838A  LEU*     1.3    76.8    -      -       -      +
    840A  GLN*     1.3    59.6    +      -       +      +
    842A  MET*     3.4    17.2    +      -       +      +
    843A  LEU*     3.3    32.2    +      -       +      +
    871A  SER*     3.5    21.7    -      -       -      +
    874A  ASP*     5.8     0.8    +      -       -      -
   1038A  GLY*     5.4     6.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 840 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    837A  ASP*     3.4    29.5    +      -       -      +
    838A  LEU      3.2     0.6    -      -       -      -
    839A  ARG*     1.3    73.2    -      -       -      +
    841A  ASP*     1.3    63.6    +      -       -      +
    843A  LEU*     3.4     3.8    +      -       -      +
    844A  ILE*     3.1    28.5    +      -       -      +
    966A  GLY*     3.4    28.2    +      -       -      -
    969A  LEU*     3.5    23.1    -      -       +      +
    970A  GLY*     3.4    18.2    -      -       -      +
   1038A  GLY      3.5    25.4    -      -       -      +
   1039A  MET*     3.7    28.6    -      -       +      +
   1040A  PRO*     5.0     2.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 841 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    836A  ASP*     5.1     0.7    -      -       -      +
    837A  ASP      3.6     4.2    -      -       -      +
    838A  LEU*     3.3    30.2    +      -       -      +
    840A  GLN*     1.3    73.9    -      -       -      +
    842A  MET*     1.4    62.9    +      -       -      +
    844A  ILE*     3.3     2.4    +      -       -      +
    845A  LEU*     3.0    36.1    +      -       +      +
    867A  TYR*     4.2     5.0    +      -       +      +
    869A  CYS*     4.0    14.6    -      -       -      -
    964A  ASP*     3.7     8.8    +      -       -      +
    965A  PHE*     2.9    36.4    +      -       +      +
    966A  GLY*     2.9    26.9    +      -       -      +
   2191A  ZW3      4.3     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 842 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    661A  LEU*     3.7    28.0    -      -       +      +
    665A  GLN*     6.1     0.9    -      -       -      +
    698A  PHE*     5.0    17.9    -      -       +      -
    701A  SER*     4.1    10.5    -      -       -      +
    702A  GLU*     5.6     2.7    -      -       -      +
    838A  LEU      2.9    15.1    +      -       -      +
    839A  ARG*     3.4    37.5    -      -       +      +
    840A  GLN      3.3     0.2    -      -       -      -
    841A  ASP*     1.4    74.7    -      -       -      +
    843A  LEU*     1.3    57.9    +      -       +      +
    845A  LEU*     3.5     7.6    +      -       -      +
    846A  GLN*     3.0    29.3    +      -       -      +
    849A  ARG*     5.1     1.2    +      -       -      -
    869A  CYS*     3.6    22.4    -      -       -      +
    870A  ILE*     4.1     9.2    -      -       -      -
    871A  SER*     3.5    26.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 843 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    661A  LEU*     3.8    26.2    -      -       +      -
    662A  GLN*     3.9    29.1    -      -       +      +
    665A  GLN*     4.4    14.6    -      -       +      +
    839A  ARG*     3.3    15.5    +      -       +      +
    840A  GLN      3.8     6.1    -      -       -      +
    841A  ASP      3.4     0.2    -      -       -      -
    842A  MET*     1.3    77.0    -      -       +      +
    844A  ILE*     1.3    64.2    +      -       -      +
    846A  GLN*     3.3     4.1    +      -       +      +
    847A  ILE*     3.1    26.7    +      -       +      +
   1034A  MET*     3.8    25.8    -      -       +      +
   1037A  THR*     4.4     4.9    -      -       -      +
   1038A  GLY*     3.6    31.2    -      -       -      +
   1039A  MET*     3.8     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 844 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    840A  GLN      3.1    12.5    +      -       -      +
    841A  ASP      3.8     5.4    -      -       -      +
    843A  LEU*     1.3    73.5    -      -       -      +
    845A  LEU*     1.3    57.9    +      -       -      +
    847A  ILE*     3.1     7.3    +      -       +      +
    848A  LEU*     3.0    34.4    +      -       +      +
    942A  LEU*     4.3    16.1    -      -       +      +
    944A  ILE*     3.9    25.1    -      -       +      -
    965A  PHE*     3.7    40.4    -      -       +      -
    969A  LEU*     3.5    32.8    -      -       +      -
   1034A  MET*     3.6    29.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 845 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    841A  ASP*     3.0    26.9    +      -       +      +
    842A  MET*     3.9     4.5    -      -       -      +
    844A  ILE*     1.3    74.6    -      -       -      +
    846A  GLN*     1.3    61.3    +      -       -      +
    848A  LEU*     3.4    11.4    +      -       +      +
    849A  ARG*     3.2    39.8    +      -       -      +
    865A  LEU      4.8     0.4    -      -       -      +
    866A  PRO*     3.6    29.2    -      -       +      +
    867A  TYR*     3.6    40.2    -      -       +      +
    869A  CYS*     3.7    24.5    -      -       +      -
    965A  PHE*     3.8    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 846 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    657A  LEU      4.2     5.7    +      -       -      +
    658A  HIS*     2.8    42.5    +      -       -      +
    659A  TYR*     5.6     0.4    -      -       -      -
    661A  LEU*     4.3    27.1    -      -       +      +
    662A  GLN*     5.7     7.0    -      -       +      +
    698A  PHE*     5.7     4.5    -      -       -      -
    842A  MET      3.0    17.3    +      -       -      +
    843A  LEU*     3.7     6.1    -      -       +      +
    844A  ILE      3.3     0.2    -      -       -      -
    845A  LEU*     1.3    71.7    -      -       -      +
    847A  ILE*     1.3    66.7    +      -       +      +
    849A  ARG*     3.0    44.7    +      -       -      +
    850A  ILE*     3.1    25.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 847 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    662A  GLN*     4.3    14.6    -      -       -      +
    843A  LEU*     3.1     8.2    +      -       +      +
    844A  ILE*     3.1     8.7    +      -       -      +
    846A  GLN*     1.3    76.3    -      -       +      +
    848A  LEU*     1.3    58.1    +      -       -      +
    850A  ILE*     3.1    10.2    +      -       +      +
    851A  MET*     2.9    38.5    +      -       +      +
    942A  LEU*     3.9    29.6    -      -       +      -
   1027A  LEU*     4.7    13.5    -      -       +      -
   1030A  LEU*     4.4    22.2    -      -       +      +
   1031A  PHE      4.7     1.8    -      -       -      +
   1034A  MET*     3.5    46.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 848 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    844A  ILE*     3.0    19.8    +      -       +      +
    845A  LEU*     3.5    28.5    -      -       +      +
    847A  ILE*     1.3    75.5    -      -       -      +
    849A  ARG*     1.4    55.1    +      -       -      +
    851A  MET*     3.2    12.1    +      -       +      +
    852A  GLU*     3.0    31.1    +      -       -      +
    864A  LEU*     3.7    13.6    -      -       +      +
    866A  PRO*     4.4     9.2    -      -       +      -
    935A  TYR*     4.1    29.6    -      -       +      +
    938A  ALA*     3.8    29.4    -      -       +      -
    939A  THR*     6.1     0.7    -      -       -      +
    942A  LEU*     4.2    15.7    -      -       +      -
    944A  ILE*     5.9     1.8    -      -       +      -
    965A  PHE*     4.3    14.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 849 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    658A  HIS*     4.4    13.7    +      -       +      +
    842A  MET      5.1     1.2    +      -       -      -
    845A  LEU*     3.2    33.2    +      -       -      +
    846A  GLN*     3.0    44.2    +      -       -      +
    848A  LEU*     1.4    73.6    -      -       -      +
    850A  ILE*     1.3    62.6    +      -       -      +
    852A  GLU*     3.3    10.3    +      -       -      +
    853A  SER*     3.1    21.8    +      -       -      -
    866A  PRO*     3.0    41.5    +      -       +      +
    867A  TYR      3.5    15.0    +      -       -      -
    868A  GLY*     4.4     5.5    -      -       -      +
    869A  CYS      5.3     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 850 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    658A  HIS*     3.7    27.1    -      -       +      +
    659A  TYR*     3.7    39.0    -      -       +      +
    662A  GLN*     4.8     4.9    -      -       +      +
    846A  GLN*     3.1    22.8    +      -       +      +
    847A  ILE*     3.1    11.9    +      -       -      +
    849A  ARG*     1.3    75.2    -      -       -      +
    851A  MET*     1.4    58.5    +      -       -      +
    853A  SER*     2.8    26.0    +      -       -      +
    854A  ILE*     3.0    28.9    +      -       +      +
   1026A  LEU*     4.4     3.4    -      -       +      -
   1027A  LEU*     5.0     3.8    -      -       +      -
   1030A  LEU*     3.8    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 851 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    847A  ILE*     2.9    26.7    +      -       +      +
    848A  LEU*     3.5    18.8    -      -       +      +
    850A  ILE*     1.4    75.5    -      -       -      +
    852A  GLU*     1.3    56.4    +      -       -      +
    854A  ILE*     3.2     9.9    +      -       -      +
    855A  TRP*     3.0    54.4    +      -       +      -
    864A  LEU*     4.4     1.6    -      -       +      -
    938A  ALA*     2.9    49.6    -      -       +      +
    941A  VAL*     5.4     3.6    -      -       -      -
    942A  LEU*     4.7     4.5    -      -       -      -
   1020A  LEU*     3.9    25.1    -      -       +      -
   1027A  LEU*     4.5    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 852 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  TYR*     5.2     0.3    +      -       -      -
    298A  LYS*     5.2     4.8    +      -       -      -
    848A  LEU      3.0    16.6    +      -       -      +
    849A  ARG*     3.5    11.9    -      -       -      +
    850A  ILE      3.3     0.4    -      -       -      -
    851A  MET*     1.3    76.6    -      -       -      +
    853A  SER*     1.3    55.1    +      -       -      +
    855A  TRP*     3.5    11.7    +      -       +      +
    856A  GLU*     3.0    27.8    +      -       -      +
    860A  LEU      4.8     1.2    -      -       -      +
    861A  ASP*     4.1     7.6    -      -       -      +
    862A  LEU      4.5     3.1    +      -       -      -
    863A  CYS*     4.0     7.4    +      -       -      -
    864A  LEU*     3.2    50.9    +      -       +      +
    866A  PRO*     4.0    16.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 853 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  LYS*     5.8     6.3    -      -       -      -
    658A  HIS*     4.2    25.0    +      -       -      -
    659A  TYR*     5.5     1.7    +      -       -      -
    849A  ARG      3.1    11.4    +      -       -      -
    850A  ILE*     2.8    24.3    +      -       -      +
    852A  GLU*     1.3    72.5    -      -       -      +
    854A  ILE*     1.4    65.6    +      -       -      +
    856A  GLU*     3.2    14.9    +      -       -      +
    857A  THR*     3.1    27.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 854 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    850A  ILE*     3.0    34.1    +      -       +      +
    851A  MET*     3.4     9.0    -      -       -      +
    853A  SER*     1.4    78.2    +      -       -      +
    855A  TRP*     1.3    64.6    +      -       +      +
    857A  THR*     2.6    31.5    +      -       -      -
    858A  GLU*     3.6     5.0    -      -       -      +
   1019A  ALA*     3.9    15.5    -      -       +      +
   1020A  LEU*     4.1    23.3    -      -       +      -
   1023A  HIS*     3.4    50.5    -      -       +      +
   1026A  LEU*     4.4     7.0    -      -       +      -
   1027A  LEU*     4.3    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 855 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    851A  MET*     3.0    42.2    +      -       +      +
    852A  GLU*     3.8    11.0    -      -       +      +
    853A  SER      3.4     0.2    -      -       -      -
    854A  ILE*     1.3    74.8    -      -       -      +
    856A  GLU*     1.3    60.6    +      -       -      +
    858A  GLU*     3.0    13.1    +      -       -      +
    860A  LEU*     2.9    42.1    +      -       +      +
    862A  LEU*     3.5    35.2    -      -       +      +
    864A  LEU*     3.8    23.1    -      -       +      -
    934A  GLY*     3.7    20.2    -      -       -      -
    937A  VAL*     4.0    12.6    -      -       +      -
    938A  ALA*     4.4     0.2    -      -       +      -
   1016A  ALA*     3.0    33.9    +      -       +      +
   1019A  ALA*     3.8    20.0    -      -       +      -
   1020A  LEU*     3.6    33.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 856 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  LYS*     4.6    17.4    -      -       -      +
    206A  PRO      4.1     5.0    -      -       -      +
    208A  PRO*     3.7    27.6    -      -       +      +
    210A  TYR*     3.2    26.5    +      -       -      +
    294A  ARG*     4.1    13.0    +      -       -      -
    298A  LYS*     5.5     1.9    +      -       -      -
    852A  GLU      3.0    14.6    +      -       -      +
    853A  SER*     3.3    17.1    -      -       -      +
    854A  ILE      3.2     0.2    -      -       -      -
    855A  TRP*     1.3    75.5    -      -       -      +
    857A  THR*     1.4    56.5    +      -       +      +
    858A  GLU      3.0     0.2    -      -       -      -
    859A  SER*     2.9    21.6    +      -       -      +
    860A  LEU      3.6     2.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 857 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  LYS*     6.2     4.7    -      -       +      -
    853A  SER*     3.1    19.0    +      -       -      +
    854A  ILE*     2.6    21.0    +      -       -      +
    856A  GLU*     1.4    75.5    -      -       +      +
    858A  GLU*     1.3    67.6    +      -       -      +
    859A  SER*     3.5     1.8    +      -       -      -
   1023A  HIS*     4.2    13.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 858 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    854A  ILE      3.6     7.9    -      -       -      +
    855A  TRP      3.0     6.0    +      -       -      +
    857A  THR*     1.3    91.5    +      -       -      +
    859A  SER*     1.3    69.6    +      -       -      +
    860A  LEU*     3.3    20.5    +      -       +      +
   1019A  ALA*     3.7    30.0    -      -       +      +
   1022A  HIS*     3.3    34.4    +      -       -      +
   1023A  HIS*     4.2     6.2    +      -       -      -
----------------------------------------------------------
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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