Contacts of the helix formed by residues 754 - 780 (chain B) in PDB entry 5WRZ


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 ASN 754 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    756A  ASP*     6.0     2.0    -      -       -      +
    720B  VAL*     4.9     8.9    -      -       -      +
    752B  LEU      3.6     0.8    -      -       -      -
    753B  ASN*     1.3    96.1    +      -       -      +
    755B  ALA*     1.3    65.4    +      -       -      +
    756B  ASP*     3.5    12.6    +      -       -      +
    757B  SER*     2.8    31.7    +      -       -      -
    758B  VAL*     3.2    25.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 755 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720B  VAL*     5.8     2.0    -      -       -      +
    754B  ASN*     1.3    76.0    -      -       +      +
    756B  ASP*     1.3    65.1    +      -       -      +
    757B  SER      3.2     0.3    +      -       -      -
    758B  VAL*     3.4     5.6    +      -       -      +
    759B  GLN*     3.1    36.8    +      -       -      +
    887B  THR*     5.5    12.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 756 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    720A  VAL*     5.5     8.9    -      -       -      +
    754B  ASN*     3.4    13.5    +      -       -      +
    755B  ALA*     1.3    80.1    -      -       -      +
    757B  SER*     1.3    57.6    +      -       -      +
    759B  GLN*     3.6    16.1    +      -       -      +
    760B  ALA*     3.1    28.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 757 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    751B  LEU      2.8    20.1    +      -       -      -
    752B  LEU*     3.7    28.9    -      -       -      +
    753B  ASN*     3.8     2.2    +      -       -      -
    754B  ASN*     2.8    27.9    +      -       -      -
    756B  ASP*     1.3    72.9    -      -       -      +
    758B  VAL*     1.3    61.8    +      -       -      +
    760B  ALA*     3.4     5.5    +      -       -      +
    761B  LYS*     3.0    33.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 758 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    713B  LEU*     3.9    24.5    -      -       +      +
    716B  VAL*     3.7    33.0    -      -       +      -
    717B  GLN*     4.9     7.9    -      -       +      +
    720B  VAL*     6.1     0.9    -      -       +      -
    752B  LEU*     5.2     3.1    -      -       +      +
    754B  ASN      3.2    16.0    +      -       -      +
    755B  ALA*     3.8     5.8    -      -       -      +
    757B  SER*     1.3    80.4    -      -       -      +
    759B  GLN*     1.3    59.3    +      -       -      +
    761B  LYS*     3.4     2.2    +      -       -      +
    762B  ALA*     2.8    27.5    +      -       -      +
    885B  PRO*     4.1    26.5    -      -       +      -
    887B  THR*     5.0     6.3    -      -       +      +
    888B  GLY*     4.3    10.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 759 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    755B  ALA*     3.1    30.4    +      -       -      +
    756B  ASP*     3.9    14.1    +      -       -      +
    757B  SER      3.3     0.2    -      -       -      -
    758B  VAL*     1.3    75.5    -      -       -      +
    760B  ALA*     1.3    59.6    +      -       -      +
    762B  ALA*     3.2     1.9    +      -       -      +
    763B  GLU*     2.9    37.0    +      -       -      +
    887B  THR      4.1     7.0    -      -       -      +
    888B  GLY*     3.4    35.4    +      -       -      +
    889B  TYR*     5.3     2.2    -      -       -      +
    890B  MET*     5.6     6.3    -      -       -      +
    937B  HIS*     5.6     3.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 760 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689B  TYR*     5.9     0.2    -      -       -      -
    756B  ASP      3.1    15.5    +      -       -      +
    757B  SER*     3.8     6.1    -      -       -      +
    759B  GLN*     1.3    79.6    -      -       -      +
    761B  LYS*     1.3    61.4    +      -       +      +
    763B  GLU*     3.4    10.4    +      -       -      +
    764B  MET*     3.0    26.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 761 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689B  TYR      5.4     2.0    +      -       -      -
    713B  LEU*     3.7    21.3    -      -       +      -
    736B  PHE*     3.8    24.9    -      -       +      -
    737B  TYR*     3.4    30.0    +      -       -      -
    742B  HIS*     4.1    19.8    +      -       -      -
    744B  PHE*     5.9     3.2    -      -       -      -
    750B  PRO      5.1     0.2    -      -       -      -
    752B  LEU*     3.5    23.6    -      -       +      -
    757B  SER      3.0    21.3    +      -       -      +
    758B  VAL      3.9     0.7    -      -       -      +
    760B  ALA*     1.3    83.3    -      -       +      +
    762B  ALA*     1.3    55.3    +      -       -      +
    764B  MET*     3.2    15.5    +      -       +      +
    765B  LEU*     2.9    32.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 762 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710B  TYR*     4.0     3.3    -      -       +      -
    713B  LEU*     3.6    13.6    -      -       +      +
    758B  VAL      2.8    21.5    +      -       -      +
    759B  GLN*     3.5     7.9    -      -       -      +
    761B  LYS*     1.3    71.7    -      -       -      +
    763B  GLU*     1.3    57.5    +      -       -      +
    765B  LEU*     3.2     5.8    +      -       -      +
    766B  ASP*     3.0    35.3    +      -       -      +
    885B  PRO*     4.6     7.2    -      -       +      -
    888B  GLY*     4.3     8.7    -      -       -      +
    889B  TYR*     3.9    25.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 763 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    759B  GLN*     2.9    23.6    +      -       -      +
    760B  ALA*     3.5     8.7    -      -       -      +
    762B  ALA*     1.3    74.2    -      -       -      +
    764B  MET*     1.3    66.1    +      -       -      +
    765B  LEU      3.2     0.2    +      -       -      -
    766B  ASP*     3.3    11.6    +      -       +      +
    767B  ASN*     3.0    37.4    +      -       -      +
    865B  ARG*     5.6     1.1    -      -       -      +
    889B  TYR*     5.0     3.5    -      -       +      -
    907B  TYR*     4.1     9.4    -      -       -      -
    909B  HIS*     4.1    20.7    +      -       -      +
   1101B  7U3      3.3    35.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 764 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689B  TYR*     3.9    58.1    -      -       +      +
    691B  ILE*     4.1    11.7    -      -       -      -
    736B  PHE*     3.7    35.9    -      -       +      -
    740B  ILE*     4.6     4.3    -      -       +      -
    742B  HIS*     4.3    16.2    -      -       +      +
    760B  ALA      3.0    15.0    +      -       -      +
    761B  LYS*     3.2    19.0    +      -       +      +
    763B  GLU*     1.3    76.0    -      -       -      +
    765B  LEU*     1.3    69.7    +      -       +      +
    767B  ASN*     3.2     4.3    +      -       -      +
    768B  LEU*     2.9    33.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 765 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    706B  ILE*     3.9    14.0    -      -       +      +
    709B  ALA*     3.7    22.4    -      -       +      -
    710B  TYR*     3.4    60.0    +      -       +      +
    713B  LEU*     3.9    13.9    -      -       +      -
    736B  PHE*     4.1     5.2    -      -       +      -
    740B  ILE*     4.5     6.1    -      -       +      -
    761B  LYS      2.9    16.4    +      -       -      +
    762B  ALA      3.6     2.2    -      -       -      +
    763B  GLU      3.2     0.4    -      -       -      -
    764B  MET*     1.3    92.0    -      -       +      +
    766B  ASP*     1.3    56.2    +      -       -      +
    767B  ASN      3.1     1.1    -      -       -      -
    768B  LEU*     3.2    16.3    +      -       +      +
    769B  LEU*     2.8    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 766 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710B  TYR*     2.5    29.0    +      -       -      -
    762B  ALA      3.0    16.0    +      -       -      +
    763B  GLU*     3.3    12.7    -      -       +      +
    765B  LEU*     1.3    74.4    -      -       -      +
    767B  ASN*     1.3    68.6    +      -       -      +
    769B  LEU*     3.3    13.1    +      -       -      +
    770B  ASP*     3.4    18.5    +      -       -      +
    880B  ALA*     4.2     8.2    -      -       -      +
    889B  TYR*     2.7    37.8    +      -       -      -
   1101B  7U3      5.1     8.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 767 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689B  TYR*     2.7    32.0    +      -       +      +
    763B  GLU*     3.0    27.9    +      -       -      +
    764B  MET      3.5     6.3    -      -       -      +
    766B  ASP*     1.3    79.9    -      -       -      +
    768B  LEU*     1.3    62.4    +      -       -      +
    770B  ASP      3.3     3.1    +      -       -      -
    771B  ILE*     3.1    27.2    +      -       +      +
    865B  ARG*     3.2    25.6    -      -       +      +
    867B  THR*     5.8     0.7    -      -       -      +
    868B  ASN*     3.0    34.0    +      -       -      +
    909B  HIS*     5.4     0.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 768 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    686B  MET*     4.0    18.4    -      -       +      -
    689B  TYR*     4.9     7.0    -      -       +      -
    691B  ILE*     4.0    31.2    -      -       +      -
    701B  LEU*     3.9    27.7    -      -       +      +
    706B  ILE*     3.6    18.2    -      -       +      +
    740B  ILE*     4.8     9.4    -      -       +      -
    764B  MET*     2.9    31.4    +      -       +      +
    765B  LEU*     3.2    24.0    +      -       +      +
    767B  ASN*     1.3    77.5    -      -       -      +
    769B  LEU*     1.3    61.2    +      -       -      +
    771B  ILE*     3.3    12.2    +      -       +      +
    772B  GLU*     3.0    18.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 769 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    703B  LYS*     4.2    26.0    -      -       +      +
    706B  ILE*     3.9    29.6    -      -       +      +
    707B  GLN*     5.4     4.9    -      -       +      +
    710B  TYR*     4.5     8.7    -      -       +      +
    765B  LEU      2.8    14.6    +      -       -      +
    766B  ASP*     3.3    12.1    +      -       -      +
    768B  LEU*     1.3    72.0    -      -       -      +
    770B  ASP*     1.3    60.5    +      -       -      +
    772B  GLU*     3.3     4.8    +      -       -      +
    773B  VAL*     3.0    35.3    +      -       +      +
    878B  ARG*     4.3    24.7    -      -       -      +
    879B  ILE      6.1     0.7    -      -       -      +
    881B  PRO*     4.4    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 770 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    766B  ASP      3.4    10.1    +      -       -      +
    767B  ASN      3.3     1.6    +      -       -      +
    768B  LEU      3.3     0.2    -      -       -      -
    769B  LEU*     1.3    75.3    -      -       -      +
    771B  ILE*     1.3    60.5    +      -       -      +
    773B  VAL*     3.4     7.0    +      -       -      +
    774B  ALA*     3.0    27.7    +      -       -      +
    867B  THR      4.3     3.1    -      -       -      +
    868B  ASN*     3.5    53.3    +      -       -      +
    871B  GLY*     4.3    11.2    +      -       -      -
    872B  ILE*     4.8     6.4    -      -       -      +
    878B  ARG*     2.4    35.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 771 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682B  MET*     4.0    21.3    -      -       +      +
    685B  ALA*     4.2    17.7    -      -       +      -
    686B  MET*     4.7     3.4    -      -       +      -
    689B  TYR*     5.7     2.0    -      -       +      -
    698B  LEU*     3.7    28.9    -      -       +      -
    701B  LEU*     4.2     7.6    -      -       +      -
    767B  ASN*     3.1    21.9    +      -       +      +
    768B  LEU*     3.6    20.9    -      -       +      +
    769B  LEU      3.3     0.2    -      -       -      -
    770B  ASP*     1.3    73.2    -      -       -      +
    772B  GLU*     1.3    59.2    +      -       -      +
    774B  ALA*     3.2     4.1    +      -       -      +
    775B  TYR*     2.9    27.9    +      -       -      +
    867B  THR*     3.7    37.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 772 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    698B  LEU*     6.2     0.4    -      -       -      -
    701B  LEU*     3.8    30.0    -      -       +      +
    702B  SER*     4.2     1.4    -      -       -      -
    703B  LYS*     4.0    43.6    +      -       -      +
    706B  ILE*     4.3     9.9    -      -       +      -
    768B  LEU      3.0    13.9    +      -       -      +
    769B  LEU*     3.7     7.4    -      -       +      +
    771B  ILE*     1.3    73.4    -      -       -      +
    773B  VAL*     1.3    79.6    +      -       -      +
    775B  TYR*     3.5     4.8    +      -       -      +
    776B  SER*     2.9    37.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 773 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    703B  LYS*     5.7     5.2    -      -       -      -
    769B  LEU*     3.0    23.7    +      -       +      +
    770B  ASP*     3.6     9.6    -      -       -      +
    771B  ILE      3.3     0.2    -      -       -      -
    772B  GLU*     1.3    86.6    +      -       -      +
    774B  ALA*     1.3    57.5    +      -       -      +
    776B  SER*     2.9    20.6    +      -       -      +
    777B  LEU*     2.9    21.1    +      -       +      +
    871B  GLY*     3.8    22.2    -      -       -      +
    874B  SER*     4.1    11.7    -      -       -      +
    875B  GLN*     4.3    12.6    -      -       +      +
    878B  ARG*     4.2    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 774 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    676B  ILE      5.1     0.9    -      -       -      +
    677B  PHE*     4.2     4.9    -      -       +      -
    682B  MET*     4.0    20.4    -      -       +      -
    770B  ASP      3.0    17.4    +      -       -      +
    771B  ILE*     3.2     6.9    +      -       -      +
    773B  VAL*     1.3    74.6    -      -       -      +
    775B  TYR*     1.3    66.1    +      -       -      +
    777B  LEU*     3.2     7.9    +      -       -      +
    778B  LEU*     3.0    23.7    +      -       -      +
    867B  THR      4.9     6.1    -      -       -      +
    870B  ALA*     3.7    29.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 775 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679B  VAL*     4.5     9.2    -      -       +      -
    682B  MET*     4.2    12.9    -      -       -      -
    683B  LYS*     6.3     0.2    -      -       -      -
    698B  LEU*     3.5    39.9    -      -       +      +
    699B  GLY*     3.6    34.4    +      -       -      -
    771B  ILE      2.9    16.3    +      -       -      +
    772B  GLU*     4.1     4.7    -      -       -      +
    774B  ALA*     1.3    75.8    -      -       -      +
    776B  SER*     1.3    60.0    +      -       -      +
    778B  LEU*     3.3     6.5    +      -       +      +
    779B  ARG*     3.0    77.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 776 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    772B  GLU*     2.9    31.8    +      -       -      -
    773B  VAL*     2.9    18.7    +      -       -      +
    775B  TYR*     1.3    78.3    -      -       -      +
    777B  LEU*     1.3    59.3    +      -       -      +
    779B  ARG*     4.4     4.0    -      -       -      +
    780B  GLY*     2.8    27.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 777 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677B  PHE*     4.4    22.7    -      -       +      -
    773B  VAL*     2.9    17.5    +      -       +      +
    774B  ALA*     3.5    10.5    -      -       -      +
    776B  SER*     1.3    82.8    +      -       -      +
    778B  LEU*     1.3    60.7    +      -       -      +
    780B  GLY*     3.3     9.8    +      -       -      +
    796B  LYS*     3.1    51.1    +      -       +      +
    797B  LEU*     4.9     0.9    -      -       +      -
    870B  ALA      4.2     7.9    -      -       -      +
    874B  SER*     3.7    31.4    -      -       -      +
    875B  GLN*     5.7     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 778 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677B  PHE*     3.9    24.9    -      -       +      +
    679B  VAL*     3.6    30.7    -      -       +      -
    682B  MET*     4.4    11.0    -      -       +      -
    774B  ALA      3.0    13.0    +      -       -      +
    775B  TYR*     3.5     8.5    -      -       +      +
    776B  SER      3.2     0.2    -      -       -      -
    777B  LEU*     1.3    78.8    -      -       -      +
    779B  ARG*     1.3    80.6    +      -       -      +
    780B  GLY      3.9     0.9    -      -       -      +
    793B  ASN*     3.8    31.9    -      -       -      +
    796B  LYS*     3.2    19.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 779 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679B  VAL*     4.2    14.6    -      -       -      +
    775B  TYR*     3.0    69.9    +      -       +      +
    776B  SER*     3.7     4.3    -      -       -      +
    778B  LEU*     1.3    96.2    +      -       -      +
    780B  GLY*     1.3    62.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 780 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    776B  SER      2.8    19.0    +      -       -      -
    777B  LEU*     3.3     8.3    +      -       -      -
    778B  LEU      3.9     0.9    -      -       -      +
    779B  ARG*     1.3    81.5    -      -       -      +
    781B  GLY*     1.3    65.7    +      -       -      -
    782B  SER      3.9     1.6    +      -       -      +
    796B  LYS*     3.3    19.5    +      -       -      -
----------------------------------------------------------
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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