Contacts of the helix formed by residues 650 - 677 (chain B) in PDB entry 5QSY


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 ILE 650 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    601B  LEU*     4.1    22.9    -      -       +      +
    604B  TYR*     3.6    31.0    -      -       +      +
    605B  SER*     4.3     8.5    +      -       -      +
    610B  GLU*     4.9     3.8    -      -       +      -
    613B  LEU*     3.4    29.8    -      -       +      -
    643B  LEU*     4.4    11.4    -      -       +      +
    645B  SER*     4.6     1.3    -      -       -      +
    648B  TYR*     2.8    38.7    +      -       +      +
    649B  THR*     1.3    73.2    -      -       -      +
    651B  GLN*     1.3    58.8    +      -       -      +
    653B  ARG*     2.7    45.0    +      -       -      +
    654B  VAL*     3.2    11.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 651 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    643B  LEU      4.6     2.0    -      -       -      -
    644B  CYS*     4.5    10.1    -      -       +      -
    645B  SER*     4.6     2.0    -      -       -      +
    646B  GLU*     3.3    56.8    +      -       +      +
    647B  GLU      5.2     1.0    -      -       -      +
    648B  TYR      2.7    19.5    +      -       -      +
    649B  THR      3.3     0.2    -      -       -      -
    650B  ILE*     1.3    73.1    -      -       -      +
    652B  ASN*     1.3    66.5    +      -       -      +
    654B  VAL*     3.2    12.5    +      -       -      +
    655B  ASP*     2.7    48.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 652 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  TYR*     4.0    12.2    -      -       +      -
    649A  THR*     6.0     2.2    -      -       -      +
    649B  THR      3.9     9.7    +      -       -      +
    650B  ILE      3.2     0.4    +      -       -      -
    651B  GLN*     1.3    81.2    -      -       -      +
    653B  ARG*     1.3    62.5    +      -       -      +
    655B  ASP*     3.4    14.5    +      -       -      +
    656B  ILE*     3.2    43.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 653 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  TYR*     3.6    62.9    +      -       +      +
    651A  GLN*     5.0     1.6    +      -       -      -
    610B  GLU*     3.3    39.5    -      -       -      +
    613B  LEU*     4.4    18.2    -      -       +      +
    614B  ASP*     2.9    38.7    +      -       -      +
    617B  LEU*     4.0     6.7    -      -       +      +
    649B  THR*     4.2    10.7    +      -       -      +
    650B  ILE*     2.7    36.2    +      -       -      +
    652B  ASN*     1.3    71.7    -      -       -      +
    654B  VAL*     1.3    62.7    +      -       -      +
    656B  ILE*     3.8     3.4    +      -       -      +
    657B  ALA*     3.6    18.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 654 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    613B  LEU*     4.6    12.1    -      -       +      -
    617B  LEU*     4.2    12.5    -      -       +      +
    640B  TYR*     3.7    22.2    -      -       +      -
    643B  LEU*     3.6    41.5    -      -       +      +
    644B  CYS*     3.4    26.9    -      -       -      +
    650B  ILE*     3.2    16.7    +      -       +      +
    651B  GLN*     3.5     7.2    -      -       -      +
    653B  ARG*     1.3    73.2    -      -       -      +
    655B  ASP*     1.4    55.2    +      -       -      +
    657B  ALA*     2.9     6.2    +      -       -      +
    658B  ARG*     2.8    32.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 655 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    644B  CYS*     3.7    11.3    -      -       -      +
    651B  GLN*     2.7    40.4    +      -       -      +
    652B  ASN*     3.4    14.1    +      -       -      +
    654B  VAL*     1.4    76.9    -      -       -      +
    656B  ILE*     1.3    59.3    +      -       +      +
    658B  ARG*     2.9    37.3    +      -       -      +
    659B  SER*     2.9    36.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 656 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  TYR*     3.8    25.8    -      -       +      +
    649A  THR      6.2     0.4    -      -       -      +
    652A  ASN*     4.1    26.9    -      -       +      +
    652B  ASN*     3.2    34.0    +      -       -      +
    653B  ARG      4.1     4.5    -      -       -      +
    654B  VAL      3.1     1.0    +      -       -      -
    655B  ASP*     1.3    77.4    -      -       +      +
    657B  ALA*     1.3    58.9    +      -       -      +
    659B  SER*     3.7     5.0    +      -       -      -
    660B  GLN*     2.9    33.4    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 657 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    617B  LEU*     4.1    20.0    -      -       +      -
    621B  LYS*     5.4     4.2    -      -       +      +
    640B  TYR*     3.8    14.3    +      -       -      +
    653B  ARG      3.6     9.7    +      -       -      +
    654B  VAL      2.9     7.6    +      -       -      +
    656B  ILE*     1.3    76.2    -      -       -      +
    658B  ARG*     1.3    66.3    +      -       -      +
    660B  GLN*     3.4    10.5    +      -       +      +
    661B  LEU*     3.0    23.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 658 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    640B  TYR*     3.9    26.5    +      -       +      -
    644B  CYS*     3.6    27.2    -      -       -      +
    654B  VAL      2.8    17.0    +      -       -      +
    655B  ASP*     2.9    35.1    +      -       -      +
    657B  ALA*     1.3    66.8    -      -       -      +
    659B  SER*     1.3    70.3    +      -       -      +
    661B  LEU*     2.8    17.3    +      -       +      +
    662B  ILE*     3.0    28.6    +      -       +      +
    701B  PHE*     5.7     4.0    -      -       +      -
    705B  HIS*     3.4    42.8    +      -       -      +
    707B  LEU*     6.1     1.1    -      -       -      -
    710B  TRP*     6.3     0.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 659 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    655B  ASP*     2.9    20.1    +      -       -      +
    656B  ILE*     3.9     5.6    -      -       -      -
    658B  ARG*     1.3    75.4    +      -       -      +
    660B  GLN*     1.3    64.7    +      -       -      +
    661B  LEU      3.1     0.2    +      -       -      -
    662B  ILE*     3.8     1.7    -      -       -      +
    663B  ASP*     2.8    39.4    +      -       -      +
    710B  TRP*     4.2    22.8    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 660 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621B  LYS*     4.9    11.0    -      -       +      -
    656B  ILE*     2.9    24.0    +      -       +      +
    657B  ALA*     3.5    10.8    -      -       -      +
    658B  ARG      3.1     0.4    -      -       -      -
    659B  SER*     1.3    76.9    -      -       -      +
    661B  LEU*     1.3    62.5    +      -       -      +
    663B  ASP*     3.5     7.5    -      -       -      +
    664B  GLU*     3.2    39.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 661 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621B  LYS*     3.9    32.5    -      -       +      +
    624B  VAL*     4.0    16.8    -      -       +      -
    625B  GLU*     4.5     4.9    -      -       -      +
    640B  TYR*     3.8    31.2    -      -       +      +
    657B  ALA      3.0    11.7    +      -       -      +
    658B  ARG*     2.8    10.6    +      -       +      +
    660B  GLN*     1.3    74.9    -      -       -      +
    662B  ILE*     1.3    62.3    +      -       +      +
    664B  GLU*     2.9    26.1    +      -       +      +
    665B  PHE*     3.0    54.9    +      -       +      -
    701B  PHE*     4.4    11.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 662 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    658B  ARG*     3.0    29.5    +      -       +      +
    659B  SER*     3.8     3.6    -      -       -      +
    661B  LEU*     1.3    72.9    -      -       +      +
    663B  ASP*     1.3    58.3    +      -       -      +
    665B  PHE*     3.0    21.1    +      -       +      +
    666B  VAL*     2.8    42.1    +      -       +      +
    698B  LEU*     4.5     6.5    -      -       +      -
    701B  PHE*     4.4    24.5    -      -       +      -
    707B  LEU*     3.9    31.9    -      -       +      -
    710B  TRP*     3.4    40.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 663 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    659B  SER*     2.8    36.4    +      -       -      +
    660B  GLN*     3.5    10.0    -      -       -      +
    662B  ILE*     1.3    70.8    -      -       -      +
    664B  GLU*     1.3    58.3    +      -       +      +
    666B  VAL*     3.9     2.2    -      -       -      +
    667B  ASP*     3.1    36.1    +      -       -      +
    709B  LYS*     4.8     7.1    +      -       -      -
    710B  TRP*     3.7    28.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 664 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621B  LYS*     2.7    37.1    +      -       -      +
    625B  GLU*     4.5     3.9    -      -       -      +
    660B  GLN*     3.2    31.8    +      -       -      +
    661B  LEU*     2.9    12.9    +      -       +      +
    663B  ASP*     1.3    75.3    -      -       +      +
    665B  PHE*     1.3    67.8    +      -       +      +
    667B  ASP*     3.6     5.4    +      -       -      +
    668B  ARG*     3.1    24.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 665 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    624B  VAL*     3.6    19.5    -      -       +      -
    625B  GLU*     4.4    15.5    -      -       +      -
    661B  LEU*     3.0    61.0    +      -       +      -
    662B  ILE*     3.0    19.5    +      -       +      +
    664B  GLU*     1.3    76.0    -      -       +      +
    666B  VAL*     1.3    57.0    +      -       -      +
    668B  ARG*     3.3     7.4    +      -       +      +
    669B  PHE*     2.6    36.9    +      -       -      +
    694B  THR*     4.4     8.5    -      -       +      +
    697B  ARG*     3.6    43.3    -      -       +      -
    698B  LEU*     3.8    20.0    -      -       +      -
    701B  PHE*     4.8     6.1    -      +       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 666 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    662B  ILE*     2.8    25.3    +      -       +      +
    663B  ASP*     3.9     3.1    -      -       -      +
    665B  PHE*     1.3    73.3    -      -       -      +
    667B  ASP*     1.3    63.6    +      -       -      +
    669B  PHE*     3.5     6.7    -      -       -      +
    670B  ASN*     2.8    57.4    +      -       -      +
    698B  LEU*     3.7    19.7    -      -       +      -
    710B  TRP*     3.6    42.6    -      -       +      -
    711B  ASP      5.7     2.0    -      -       -      +
    712B  LEU*     4.1    11.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 667 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    663B  ASP*     3.1    22.2    +      -       -      +
    664B  GLU*     4.0     5.6    -      -       -      +
    665B  PHE      3.3     0.2    -      -       -      -
    666B  VAL*     1.3    81.7    -      -       -      +
    668B  ARG*     1.3    59.3    +      -       -      +
    670B  ASN*     4.0     5.3    +      -       -      +
    671B  HIS*     3.0    49.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 668 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    664B  GLU      3.1    16.0    +      -       -      +
    665B  PHE*     3.8     6.7    -      -       -      +
    667B  ASP*     1.3    79.6    -      -       -      +
    669B  PHE*     1.3    52.4    +      -       -      +
    671B  HIS*     4.0     5.6    -      -       -      +
    672B  SER*     2.4    41.8    +      -       -      +
    689B  TYR*     5.1     4.8    -      -       -      -
    690B  ASN*     2.8    40.3    +      -       -      +
    693B  SER*     4.3     8.5    +      -       -      -
    694B  THR*     3.5    20.1    -      -       +      +
    697B  ARG*     4.6     8.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 669 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    665B  PHE      2.6    22.5    +      -       -      +
    666B  VAL      3.5     2.7    -      -       -      +
    668B  ARG*     1.3    68.8    -      -       -      +
    670B  ASN*     1.3    69.9    +      -       -      +
    672B  SER*     3.1     4.0    +      -       -      -
    673B  VAL*     2.9    53.2    +      -       +      +
    691B  VAL*     4.3     4.9    -      -       +      -
    694B  THR*     3.6    22.3    -      -       -      -
    695B  LEU*     3.9    38.6    -      -       +      -
    698B  LEU*     3.4    23.3    -      -       +      -
    712B  LEU*     3.9    21.1    -      -       +      -
    715B  ASN*     3.6    27.6    -      -       +      -
    716B  CYS*     4.4     6.1    -      -       -      -
    719B  LEU*     4.2    13.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 670 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    666B  VAL*     2.8    45.9    +      -       -      +
    667B  ASP*     4.1     7.9    +      -       -      +
    669B  PHE*     1.3    76.4    -      -       -      +
    671B  HIS*     1.3    70.2    +      -       +      +
    673B  VAL*     3.2     3.8    +      -       -      +
    674B  GLU*     3.0    28.9    +      -       +      +
    711B  ASP      5.4     1.2    -      -       -      +
    712B  LEU*     5.2     2.3    -      -       -      +
    715B  ASN*     2.5    35.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 671 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    667B  ASP*     3.0    38.2    +      -       +      +
    668B  ARG*     4.0     6.1    -      -       +      +
    670B  ASN*     1.3    79.6    -      -       +      +
    672B  SER*     1.3    57.3    +      -       -      +
    674B  GLU*     3.1     8.8    +      -       +      +
    675B  ASP*     2.9    39.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 672 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    668B  ARG*     2.4    32.1    +      -       -      +
    669B  PHE      3.1     5.8    +      -       -      -
    671B  HIS*     1.3    76.6    -      -       -      +
    673B  VAL*     1.3    55.1    +      -       -      +
    675B  ASP*     3.6     8.7    +      -       -      +
    676B  LEU*     3.1    21.5    +      -       -      +
    687B  ASP*     5.0     2.1    -      -       -      +
    690B  ASN*     3.5    25.6    +      -       -      +
    691B  VAL*     3.3    37.6    -      -       -      +
    694B  THR*     3.7     3.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 673 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    669B  PHE*     2.9    54.9    +      -       +      +
    670B  ASN      3.7     4.9    -      -       -      +
    671B  HIS      3.2     0.2    -      -       -      -
    672B  SER*     1.3    74.7    -      -       -      +
    674B  GLU*     1.3    66.3    +      -       -      +
    676B  LEU*     3.7     1.8    -      -       -      +
    677B  LEU*     3.2    36.1    +      -       +      +
    691B  VAL*     4.3     8.5    -      -       +      -
    715B  ASN*     3.4    26.0    -      -       -      +
    718B  ARG*     4.5     6.3    -      -       +      +
    719B  LEU*     4.0    27.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 674 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    670B  ASN*     3.0    20.5    +      -       +      +
    671B  HIS*     3.1    11.6    +      -       +      +
    673B  VAL*     1.3    78.7    -      -       -      +
    675B  ASP*     1.3    64.8    +      -       -      +
    676B  LEU      3.4     0.7    +      -       -      -
    677B  LEU*     3.6     8.5    +      -       -      +
    678B  GLN*     3.4    20.1    +      -       -      +
    718B  ARG*     3.2    36.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 675 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    671B  HIS*     2.9    23.0    +      -       -      +
    672B  SER*     3.9     7.7    -      -       -      +
    674B  GLU*     1.3    79.6    -      -       -      +
    676B  LEU*     1.3    60.5    +      -       -      +
    678B  GLN*     3.6    20.2    -      -       -      +
    679B  GLU      4.7     0.9    +      -       -      -
    687B  ASP*     4.3    24.0    -      -       +      +
    690B  ASN*     5.8     2.7    +      -       -      +
   1001B  K0J      4.9    12.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 676 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    672B  SER      3.1    17.6    +      -       -      +
    673B  VAL      3.7     4.9    -      -       -      +
    674B  GLU      3.2     0.4    -      -       -      -
    675B  ASP*     1.3    74.9    -      -       -      +
    677B  LEU*     1.3    62.0    +      -       +      +
    678B  GLN      2.8    12.0    +      -       -      -
    679B  GLU      3.7    13.2    +      -       -      -
    684B  ASP      5.0     0.7    -      -       -      +
    687B  ASP*     3.7    27.2    -      -       +      +
    688B  ILE*     3.8    29.4    -      -       +      +
    691B  VAL*     3.6    20.0    -      -       +      -
    719B  LEU*     3.8    23.1    -      -       +      -
    729B  MET*     3.9    23.1    -      -       +      -
    730B  PRO*     6.3     0.2    -      -       +      -
    733B  ILE*     4.8     2.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 677 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    673B  VAL*     3.2    23.2    +      -       +      +
    674B  GLU*     3.6     5.3    +      -       -      +
    676B  LEU*     1.3    80.8    -      -       +      +
    678B  GLN*     1.3    74.5    +      -       -      +
    718B  ARG*     3.7    42.0    -      -       +      +
    719B  LEU*     4.7     2.2    -      -       +      -
    722B  THR*     3.6    42.6    -      -       +      +
    729B  MET*     4.3    13.7    -      -       +      -
----------------------------------------------------------
 Back to top of page


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