Contacts of the helix formed by residues 831 - 857 (chain A) in PDB entry 3W5D


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 GLY 831 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    830A  SER*     1.3    67.9    -      -       -      +
    832A  TRP*     1.3    65.8    +      -       -      -
    834A  PHE*     3.1    20.2    +      -       -      +
    835A  PHE*     3.2    10.7    +      -       -      +
   1005A  PTY      2.9    48.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 832 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    830A  SER      3.5     3.2    +      -       -      +
    831A  GLY*     1.3    71.8    -      -       -      -
    833A  LEU*     1.3    67.2    +      -       +      +
    835A  PHE*     3.0    34.2    +      +       -      +
    836A  ARG*     2.9    55.0    +      -       +      +
    919A  ASN*     5.5     0.4    -      -       -      -
    984A  LEU*     3.3    32.0    +      -       +      -
    987A  ILE*     3.3    37.7    -      -       +      -
    988A  ALA*     3.7    22.0    -      -       +      +
    992A  LEU*     3.7    26.5    -      -       +      -
   1005A  PTY      3.5    33.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 833 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    762A  ARG*     3.2    35.0    -      -       -      +
    828A  LEU      4.3     6.1    -      -       -      +
    829A  ILE*     4.3     4.3    -      -       +      -
    830A  SER*     3.8    22.1    +      -       -      +
    831A  GLY      3.1     0.4    -      -       -      -
    832A  TRP*     1.3    95.1    -      -       +      +
    834A  PHE*     1.3    64.8    +      -       -      +
    836A  ARG*     4.2    21.1    -      -       -      +
    837A  TYR*     3.1    48.6    +      -       +      +
    918A  GLU*     3.8    21.5    -      -       -      +
    919A  ASN*     5.3     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 834 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    829A  ILE*     4.0    20.9    -      -       +      +
    830A  SER*     5.0     0.9    -      -       -      -
    831A  GLY      3.1    20.9    +      -       -      +
    833A  LEU*     1.3    78.8    -      -       -      +
    835A  PHE*     1.3    54.7    +      -       -      +
    837A  TYR*     4.0     1.5    -      -       -      +
    838A  MET*     2.8    69.8    +      -       +      +
   1005A  PTY      4.9    17.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 835 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    831A  GLY      3.2     7.8    +      -       -      +
    832A  TRP*     3.0    38.3    +      +       -      +
    834A  PHE*     1.3    80.7    -      -       -      +
    836A  ARG*     1.3    59.8    +      -       -      +
    838A  MET*     3.1     8.2    +      -       +      +
    839A  ALA*     2.7    44.2    +      -       +      +
    984A  LEU*     4.1    21.8    -      -       +      -
   1005A  PTY      4.4    27.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 836 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    832A  TRP*     2.9    52.0    +      -       +      +
    833A  LEU*     3.6    18.1    -      -       -      +
    835A  PHE*     1.3    73.6    -      -       -      +
    837A  TYR*     1.3    80.6    +      -       +      +
    839A  ALA*     3.2     2.6    +      -       -      +
    840A  ILE*     2.8    40.2    +      -       -      +
    914A  ASN      4.6     3.2    +      -       -      -
    917A  SER      5.2     0.2    +      -       -      -
    918A  GLU*     2.8    39.2    +      -       -      +
    919A  ASN*     3.7    11.0    -      -       -      +
    981A  ASP*     2.9    40.3    +      -       -      +
    984A  LEU*     3.9    26.2    -      -       +      +
    985A  LYS*     4.0    11.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 837 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    759A  GLN*     5.0     5.9    +      -       -      -
    762A  ARG*     3.6    45.7    +      -       +      +
    763A  TYR*     5.7     1.1    -      -       -      -
    766A  SER*     3.7    36.1    +      -       -      -
    769A  VAL*     4.0    11.0    -      -       +      +
    829A  ILE*     4.5    16.8    -      -       +      -
    833A  LEU*     3.1    38.1    +      -       +      +
    834A  PHE*     4.3     2.2    -      -       -      +
    836A  ARG*     1.3   106.2    +      -       +      +
    838A  MET*     1.3    58.1    -      -       -      +
    840A  ILE*     3.9    11.8    -      -       +      +
    841A  GLY*     2.7    29.8    +      -       -      -
    911A  ASN*     5.2     7.4    -      -       -      -
    915A  SER*     5.6     4.0    +      -       -      -
    918A  GLU*     5.5     2.8    -      -       -      +
    981A  ASP*     5.5     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with MET 838 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    769A  VAL*     3.7    32.5    -      -       +      -
    773A  VAL*     5.4     6.3    -      -       +      -
    834A  PHE*     2.8    56.4    +      -       +      +
    835A  PHE*     3.3    11.0    -      -       +      +
    837A  TYR*     1.3    76.8    -      -       -      +
    839A  ALA*     1.3    56.8    +      -       -      +
    841A  GLY*     3.3     1.0    +      -       -      -
    842A  GLY*     2.9    25.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 839 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    835A  PHE*     2.7    34.0    +      -       +      +
    836A  ARG      3.6     4.0    -      -       -      +
    838A  MET*     1.3    68.9    -      -       -      +
    840A  ILE*     1.3    67.2    +      -       -      +
    842A  GLY*     3.3     2.8    +      -       -      +
    843A  TYR*     3.0    23.4    +      -       -      +
    980A  LEU*     4.2    10.7    -      -       +      +
    984A  LEU*     4.4    15.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 840 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    766A  SER*     3.9    17.3    -      -       -      +
    836A  ARG      2.8    32.4    +      -       -      +
    837A  TYR*     3.9    14.4    -      -       +      +
    839A  ALA*     1.3    71.2    -      -       -      +
    841A  GLY*     1.3    64.2    +      -       -      +
    843A  TYR*     3.3     2.6    +      -       -      +
    844A  VAL*     3.0    34.8    +      -       +      +
    911A  ASN*     3.9    22.4    -      -       -      +
    977A  VAL*     4.6     7.4    -      -       +      -
    980A  LEU*     3.7    30.1    -      -       +      -
    981A  ASP*     3.6    35.2    -      -       +      +
    984A  LEU*     4.2     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 841 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    766A  SER      4.7     2.7    -      -       -      -
    769A  VAL*     3.7    17.9    -      -       -      -
    770A  GLY*     3.6    15.8    -      -       -      -
    773A  VAL*     4.2     5.7    -      -       -      +
    837A  TYR      2.7    23.2    +      -       -      -
    838A  MET      3.6     1.1    -      -       -      -
    840A  ILE*     1.3    70.8    -      -       -      +
    842A  GLY*     1.3    66.5    +      -       -      +
    844A  VAL*     2.9     4.5    +      -       -      -
    845A  GLY*     2.9    21.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 842 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    773A  VAL*     3.9    16.4    -      -       -      +
    838A  MET*     2.9    17.6    +      -       -      +
    839A  ALA*     3.3     4.7    +      -       -      -
    841A  GLY*     1.3    71.0    -      -       -      +
    843A  TYR*     1.3    61.6    +      -       -      +
    845A  GLY*     3.2     1.2    +      -       -      -
    846A  ALA*     2.9    24.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 843 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    839A  ALA      3.0    15.7    +      -       -      +
    840A  ILE      3.8     3.6    -      -       -      +
    842A  GLY*     1.3    74.6    -      -       -      +
    844A  VAL*     1.3    58.3    +      -       -      +
    846A  ALA*     3.8     6.2    -      -       +      +
    847A  ALA*     2.9    35.9    +      -       +      +
    907A  ILE*     3.8    16.8    -      -       +      -
    973A  ILE*     2.5    36.3    +      -       +      +
    976A  PRO*     2.8    25.7    -      -       +      +
    977A  VAL*     3.9    32.3    -      -       +      -
    980A  LEU*     3.9    18.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 844 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    766A  SER      5.9     1.8    -      -       -      +
    770A  GLY*     4.1    16.2    -      -       -      -
    840A  ILE*     3.0    32.2    +      -       +      +
    841A  GLY*     2.9     5.1    +      -       -      +
    843A  TYR*     1.3    76.7    -      -       -      +
    845A  GLY*     1.3    63.2    +      -       -      +
    847A  ALA*     3.4     1.7    +      -       -      +
    848A  THR*     3.1    27.2    +      -       +      +
    904A  LEU*     4.1    20.6    -      -       +      -
    907A  ILE*     3.5    38.4    -      -       +      -
    908A  GLU*     4.0    19.1    -      -       -      +
    911A  ASN*     6.0     0.7    -      -       -      -
    977A  VAL*     4.7     4.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 845 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    770A  GLY      3.3    21.9    +      -       -      -
    773A  VAL*     3.4    21.3    -      -       -      -
    774A  CYS*     3.7     3.6    -      -       -      -
    777A  LEU*     4.0     1.3    -      -       -      -
    841A  GLY      2.9     9.7    +      -       -      -
    844A  VAL*     1.3    78.8    -      -       -      +
    846A  ALA*     1.3    58.4    +      -       -      +
    848A  THR*     3.0    15.8    +      -       -      -
    849A  VAL*     3.3    19.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 846 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    777A  LEU*     3.7    18.9    -      -       +      +
    842A  GLY      2.9    17.6    +      -       -      +
    843A  TYR*     3.8     9.6    -      -       +      +
    845A  GLY*     1.3    73.8    -      -       -      +
    847A  ALA*     1.3    59.5    +      -       -      +
    848A  THR      3.2     0.2    +      -       -      -
    849A  VAL*     3.4     2.4    +      -       -      +
    850A  GLY*     2.8    29.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 847 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    843A  TYR*     2.9    25.0    +      -       +      +
    844A  VAL      3.7     4.9    -      -       -      +
    846A  ALA*     1.3    77.4    -      -       -      +
    848A  THR*     1.3    57.4    +      -       -      +
    851A  ALA*     2.9    28.1    +      -       -      +
    903A  VAL*     3.8     6.9    -      -       +      +
    907A  ILE*     3.8    22.4    -      -       +      -
    973A  ILE*     3.6    33.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 848 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    770A  GLY      4.9     0.2    +      -       -      -
    774A  CYS*     3.2    26.1    -      -       -      +
    786A  ALA*     4.9     0.2    -      -       -      -
    787A  LEU*     4.6     4.0    -      -       +      -
    844A  VAL*     3.1    14.3    +      -       +      +
    845A  GLY*     3.0    15.9    +      -       -      -
    847A  ALA*     1.3    74.6    -      -       -      +
    849A  VAL*     1.3    65.6    +      -       -      +
    851A  ALA*     3.2     9.0    +      -       -      +
    852A  ALA*     3.3     8.7    +      -       -      +
    900A  ALA*     3.3    41.3    -      -       -      +
    903A  VAL*     3.9     7.0    -      -       +      -
    904A  LEU*     3.7    31.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 849 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    774A  CYS*     3.6    28.4    -      -       -      +
    777A  LEU*     3.9    18.2    -      -       +      -
    778A  THR*     4.4     7.6    -      -       -      +
    781A  LEU*     4.8     9.4    -      -       +      -
    783A  LEU*     3.5    32.1    -      -       +      -
    786A  ALA*     4.5     9.6    -      -       +      -
    845A  GLY      3.3    15.3    -      -       -      +
    846A  ALA      3.4     4.9    +      -       -      +
    848A  THR*     1.3    75.8    +      -       -      +
    850A  GLY*     1.3    58.3    +      -       -      +
    852A  ALA*     2.9    10.1    +      -       +      +
    853A  ALA*     2.8    28.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 850 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    846A  ALA      2.8    21.1    +      -       -      -
    847A  ALA      3.8     1.8    -      -       -      -
    849A  VAL*     1.3    73.8    -      -       -      +
    851A  ALA*     1.3    55.7    +      -       -      +
    853A  ALA*     3.9     8.4    -      -       -      +
    854A  TRP*     3.1    29.5    +      -       -      +
    973A  ILE*     4.7     9.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 851 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    847A  ALA      2.9    19.5    +      -       -      +
    848A  THR      3.4     6.7    -      -       -      +
    849A  VAL      3.1     0.4    -      -       -      -
    850A  GLY*     1.3    74.4    -      -       -      +
    852A  ALA*     1.3    66.7    +      -       -      +
    854A  TRP*     3.7     5.5    +      -       -      +
    855A  TRP      3.6    10.9    +      -       -      -
    899A  MET*     3.4    37.9    -      -       +      +
    900A  ALA*     4.0     0.7    -      -       -      +
    903A  VAL*     3.4    27.1    -      -       +      -
    969A  MET*     6.3     2.5    -      -       -      -
    973A  ILE*     4.5     5.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 852 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    784A  PRO      5.8     2.2    -      -       -      +
    786A  ALA*     4.6    12.8    -      -       +      -
    848A  THR      3.3     7.4    +      -       -      +
    849A  VAL*     2.9     9.3    +      -       +      +
    851A  ALA*     1.3    76.3    -      -       -      +
    853A  ALA*     1.3    65.3    +      -       -      +
    855A  TRP*     3.0    15.8    +      -       -      +
    856A  PHE*     3.0    23.1    +      -       +      -
    896A  PRO*     3.8    35.2    +      -       +      +
    899A  MET*     4.3     0.4    -      -       -      +
    900A  ALA*     4.5     4.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 853 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    783A  LEU*     5.1    15.7    -      -       +      -
    849A  VAL*     2.8    23.3    +      -       +      +
    850A  GLY*     3.9     9.6    -      -       -      +
    852A  ALA*     1.3    72.4    -      -       -      +
    854A  TRP*     1.3    56.3    +      -       -      +
    856A  PHE*     3.0    14.5    +      -       -      +
    857A  MET*     2.9    50.9    +      -       +      +
    870A  LEU*     5.8     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with TRP 854 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    850A  GLY      3.1    19.5    +      -       -      +
    851A  ALA*     3.8     4.3    -      -       -      +
    852A  ALA      3.2     0.4    +      -       -      -
    853A  ALA*     1.3    76.5    -      -       -      +
    855A  TRP*     1.3    79.6    +      +       +      +
    857A  MET*     4.4     1.5    -      -       -      +
    858A  TYR*     3.0    56.5    +      +       +      +
    859A  ALA*     3.1    29.4    +      -       +      -
    860A  GLU*     5.7     0.9    -      -       -      -
    899A  MET*     3.7    36.8    -      -       +      -
    965A  THR*     4.3    17.7    -      -       +      -
    966A  GLN*     4.1    20.6    -      -       +      -
    969A  MET*     3.8    46.1    -      -       +      -
----------------------------------------------------------
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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  ALA      3.6     5.1    +      -       -      +
    852A  ALA      3.0     9.2    +      -       -      +
    854A  TRP*     1.3    90.0    -      +       +      +
    856A  PHE*     1.3    89.8    +      +       -      +
    857A  MET      3.1     0.7    +      -       -      -
    859A  ALA*     3.7    29.2    -      -       +      +
    861A  ASP*     3.3    32.8    +      -       +      +
    862A  GLY*     3.5    35.3    -      -       -      -
    863A  PRO*     4.4     2.7    -      -       +      -
    890A  ILE*     4.5     8.1    -      -       +      -
    893A  ALA*     3.7    20.9    -      -       +      -
    895A  GLU*     3.3    37.4    -      -       +      +
    896A  PRO*     3.6    23.1    -      -       +      -
    899A  MET*     4.2     8.7    -      -       +      -
    966A  GLN*     3.6    19.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 856 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    783A  LEU*     5.4     1.3    -      -       +      -
    784A  PRO*     3.9    24.2    -      -       +      -
    852A  ALA*     3.0    27.5    +      -       +      -
    853A  ALA*     3.0    13.4    +      -       -      +
    855A  TRP*     1.3    93.8    -      +       -      +
    857A  MET*     1.3    54.6    +      -       +      +
    863A  PRO*     2.6    31.1    -      -       +      +
    865A  VAL*     3.4    17.0    -      -       -      +
    870A  LEU*     3.6    32.8    -      -       +      -
    890A  ILE*     3.7    22.4    -      -       +      -
    891A  PHE*     3.8    25.1    -      +       -      -
    896A  PRO*     3.5    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 857 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    853A  ALA*     2.9    38.5    +      -       +      +
    854A  TRP*     4.5     0.9    -      -       -      +
    855A  TRP      3.1     0.4    -      -       -      -
    856A  PHE*     1.3    81.9    -      -       +      +
    858A  TYR*     1.3    87.5    +      -       +      +
    859A  ALA      2.8    19.8    +      -       -      +
    863A  PRO      3.3     9.1    -      -       -      +
    864A  GLY*     3.4    12.6    -      -       -      -
    865A  VAL*     3.5    19.7    -      -       +      +
    866A  THR*     4.2     8.6    -      -       -      +
    867A  TYR*     3.7    28.7    -      -       +      -
    868A  HIS      5.2     0.4    -      -       -      -
    869A  GLN*     5.7     3.6    -      -       -      +
    870A  LEU*     6.1     2.7    -      -       +      -
----------------------------------------------------------
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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