Contacts of the helix formed by residues 643 - 669 (chain A) in PDB entry 1R1H


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 THR 643 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    625A  TYR*     4.4     2.4    -      -       -      +
    638A  LEU*     5.1     6.1    -      -       +      +
    639A  ASN*     2.8    28.3    +      -       +      +
    640A  GLY*     3.8     6.8    -      -       -      -
    642A  ASN*     1.3    80.4    -      -       +      +
    644A  LEU*     1.3    65.8    +      -       -      +
    645A  GLY      3.3     2.0    -      -       -      -
    646A  GLU*     3.2     3.5    +      -       -      +
    647A  ASN*     2.9    44.4    +      -       -      -
    706A  ILE      5.8     2.5    -      -       -      +
    709A  ASP      4.3     5.6    -      -       -      +
    710A  VAL      3.2    18.4    -      -       -      +
    711A  HIS      4.0    16.2    -      -       -      +
    712A  SER*     3.8    13.2    +      -       -      +
    713A  PRO*     5.8     0.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 644 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293A  ASN*     6.1     1.3    -      -       -      +
    591A  ASP*     3.8    27.4    -      -       +      +
    618A  SER*     3.8    34.8    -      -       -      +
    621A  MET*     4.1    12.1    -      -       +      -
    622A  VAL*     3.9    22.0    -      -       +      +
    640A  GLY      3.5    11.4    +      -       -      +
    641A  ILE*     3.2    19.8    +      -       +      +
    642A  ASN      3.3     0.4    -      -       -      -
    643A  THR*     1.3    77.3    -      -       -      +
    645A  GLY*     1.3    60.1    +      -       -      +
    647A  ASN*     3.1     4.7    +      -       -      +
    648A  ILE*     2.8    47.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 645 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    587A  HIS*     4.4     2.5    -      -       -      -
    590A  ASP*     3.7    22.9    -      -       -      +
    591A  ASP*     3.2    22.0    +      -       -      -
    642A  ASN      5.0     1.2    +      -       -      -
    643A  THR      3.3     0.4    -      -       -      -
    644A  LEU*     1.3    79.7    -      -       -      +
    646A  GLU*     1.3    60.6    +      -       -      +
    648A  ILE*     3.4     3.6    +      -       -      +
    649A  ALA*     3.0    23.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 646 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    583A  HIS*     3.0    11.0    +      -       +      -
    587A  HIS*     3.3    12.1    -      -       -      -
    643A  THR      3.2     3.8    +      -       -      +
    645A  GLY*     1.3    75.9    -      -       -      +
    647A  ASN*     1.3    60.3    +      -       -      +
    649A  ALA*     3.4     3.0    +      -       -      +
    650A  ASP*     2.9    35.0    +      -       -      +
    710A  VAL*     3.0    43.3    -      -       +      +
    711A  HIS*     3.1    33.5    +      -       +      -
    712A  SER      4.8     0.4    -      -       -      +
    717A  ARG*     5.3     0.4    -      -       -      +
   1001A   ZN      2.0    38.4    -      -       -      -
   2001A  BIR      3.3     9.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 647 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621A  MET*     4.2     8.4    +      -       +      -
    625A  TYR*     3.1    51.4    +      -       +      +
    640A  GLY      4.9     1.2    +      -       -      -
    643A  THR*     2.9    41.7    +      -       -      +
    644A  LEU*     3.1     6.7    +      -       -      +
    646A  GLU*     1.3    74.4    -      -       -      +
    648A  ILE*     1.3    61.4    +      -       -      +
    650A  ASP*     3.4     9.0    +      -       -      +
    651A  ASN*     2.9    37.8    +      -       -      +
    712A  SER*     2.8    23.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 648 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    586A  THR*     3.7     6.0    -      -       +      +
    590A  ASP*     3.9    15.9    -      -       +      -
    591A  ASP      4.2    10.1    -      -       -      +
    614A  PHE*     4.0    24.0    -      -       +      -
    618A  SER*     4.0     9.9    -      -       -      -
    621A  MET*     4.0    17.7    -      -       -      -
    644A  LEU*     2.8    42.8    +      -       +      +
    645A  GLY      3.6     7.4    -      -       -      +
    647A  ASN*     1.3    73.0    -      -       -      +
    649A  ALA*     1.3    65.6    +      -       -      +
    651A  ASN*     4.0     0.7    -      -       -      +
    652A  GLY*     3.0    20.6    +      -       -      -
    748A  VAL*     4.0    13.6    -      -       +      +
    749A  TRP*     3.9    26.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 649 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    583A  HIS*     3.3    50.9    -      -       +      +
    586A  THR*     3.8    12.7    -      -       -      -
    587A  HIS*     4.0    13.0    -      -       +      +
    645A  GLY      3.0    17.8    +      -       -      +
    646A  GLU      3.6     0.2    -      -       -      +
    647A  ASN      3.3     0.2    -      -       -      -
    648A  ILE*     1.3    76.7    -      -       -      +
    650A  ASP*     1.3    57.9    +      -       -      +
    653A  GLY*     2.8    27.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 650 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579A  MET*     2.9    24.4    -      -       +      +
    583A  HIS*     2.8    16.7    +      -       -      -
    625A  TYR*     5.2     0.6    +      -       -      +
    646A  GLU*     2.9    21.5    +      -       -      +
    647A  ASN*     3.7    10.2    -      -       -      +
    649A  ALA*     1.3    77.0    -      -       -      +
    651A  ASN*     1.3    58.4    +      -       -      +
    654A  LEU*     2.9    27.9    +      -       -      +
    712A  SER      5.8     0.2    +      -       -      -
    717A  ARG*     2.7    58.2    +      -       -      +
    721A  THR*     3.6    18.6    -      -       +      +
   2001A  BIR      4.0     2.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 651 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    621A  MET*     3.7    22.6    -      -       +      -
    625A  TYR*     3.1    28.3    +      -       -      -
    647A  ASN      2.9    27.3    +      -       -      +
    648A  ILE      4.1     0.9    -      -       -      +
    650A  ASP*     1.3    74.0    -      -       -      +
    652A  GLY*     1.3    66.4    +      -       -      +
    654A  LEU*     3.6     4.2    +      -       -      +
    655A  GLY*     3.3    17.3    +      -       -      -
    721A  THR*     3.2    22.8    -      -       -      +
    724A  ASN*     3.0    36.1    +      -       -      +
    746A  CYS      5.6     0.4    -      -       -      +
    749A  TRP*     4.8     3.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 652 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    586A  THR*     4.3     6.5    -      -       -      -
    621A  MET*     5.6     0.2    -      -       -      +
    648A  ILE      3.0    16.4    +      -       -      -
    649A  ALA      4.1     0.2    -      -       -      -
    651A  ASN*     1.3    74.4    -      -       -      +
    653A  GLY*     1.3    64.2    +      -       -      +
    655A  GLY*     3.1     3.1    +      -       -      -
    656A  GLN*     2.9    40.3    +      -       -      +
    659A  ARG*     5.1     0.2    +      -       -      -
    748A  VAL*     5.8     0.4    -      -       -      +
    749A  TRP*     4.0    23.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 653 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579A  MET*     3.4    10.6    -      -       -      +
    582A  GLY*     3.6    14.5    -      -       -      -
    583A  HIS      3.6     2.7    -      -       -      -
    586A  THR*     3.9     1.0    +      -       -      -
    649A  ALA      2.8    22.0    +      -       -      -
    650A  ASP      3.9     0.4    -      -       -      -
    652A  GLY*     1.3    72.5    -      -       -      +
    654A  LEU*     1.3    61.3    +      -       -      +
    656A  GLN*     3.3    16.5    +      -       -      +
    657A  ALA*     3.0    26.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 654 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579A  MET*     3.0    13.6    -      -       +      -
    650A  ASP      2.9    18.7    +      -       -      +
    651A  ASN      3.9     5.2    -      -       -      +
    653A  GLY*     1.3    77.0    -      -       -      +
    655A  GLY*     1.3    63.9    +      -       -      +
    657A  ALA*     3.8     2.3    -      -       -      +
    658A  TYR*     3.1    22.4    +      -       +      +
    685A  PHE*     3.8    26.0    -      -       +      -
    686A  PHE*     4.0    10.5    -      -       +      -
    689A  PHE*     4.0    21.5    -      -       +      -
    721A  THR*     3.8    34.1    -      -       -      +
    722A  LEU*     4.0    16.6    -      -       +      -
    725A  SER*     4.1    14.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 655 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    651A  ASN      3.3     8.1    +      -       -      -
    652A  GLY      3.1     6.2    +      -       -      -
    654A  LEU*     1.3    80.1    -      -       -      +
    656A  GLN*     1.3    61.3    +      -       -      +
    658A  TYR*     3.4     4.5    +      -       -      +
    659A  ARG*     3.0    50.1    +      -       -      +
    727A  GLU*     6.0     2.0    -      -       -      -
    749A  TRP*     6.2     0.4    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 656 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446A  ILE*     4.4    16.1    -      -       +      +
    449A  VAL*     3.6     9.7    -      -       +      +
    450A  PHE*     3.4    44.2    -      -       +      +
    453A  THR*     5.4     1.1    -      -       -      +
    582A  GLY*     3.1    24.8    +      -       -      -
    585A  ILE*     5.1     1.8    -      -       -      +
    586A  THR*     3.1    27.6    +      -       -      +
    652A  GLY*     2.9    21.5    +      -       -      +
    653A  GLY*     3.3     7.3    -      -       -      +
    655A  GLY*     1.3    77.0    -      -       -      +
    657A  ALA*     1.3    62.3    +      -       -      +
    659A  ARG*     3.4    15.3    +      -       -      +
    660A  ALA*     3.0    23.0    +      -       -      +
    749A  TRP*     4.1     9.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 657 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446A  ILE*     4.8     4.0    -      -       -      +
    574A  TYR*     3.2    31.0    -      -       -      +
    578A  GLY*     3.6     7.8    +      -       -      -
    579A  MET*     3.5    16.4    -      -       +      +
    653A  GLY      3.0    17.0    +      -       -      +
    654A  LEU      3.8     3.6    -      -       -      +
    656A  GLN*     1.3    76.0    -      -       -      +
    658A  TYR*     1.3    58.4    +      -       -      +
    660A  ALA*     3.1     9.0    +      -       -      +
    661A  TYR*     2.9    27.5    +      -       -      +
    685A  PHE*     4.0     6.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 658 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    654A  LEU*     3.1    18.1    +      -       +      +
    655A  GLY*     3.9     5.2    -      -       -      +
    657A  ALA*     1.3    73.2    -      -       -      +
    659A  ARG*     1.3    61.9    +      -       +      +
    661A  TYR*     3.1     8.2    +      +       -      +
    662A  GLN*     2.8    60.5    +      -       +      +
    682A  LYS*     2.8    48.8    +      -       +      +
    685A  PHE*     3.6    39.4    -      +       +      -
    686A  PHE*     3.9    24.3    -      +       +      -
    727A  GLU*     3.5    38.9    +      -       +      +
    730A  GLU*     5.2     2.8    +      -       -      -
    731A  ALA*     5.3     1.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 659 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449A  VAL*     3.7    12.6    -      -       +      -
    453A  THR*     3.6    27.6    +      -       -      +
    456A  ASP*     6.1     0.9    -      -       -      -
    652A  GLY      5.1     0.4    +      -       -      -
    655A  GLY*     3.0    43.0    +      -       -      +
    656A  GLN*     3.5    14.5    -      -       -      +
    658A  TYR*     1.3    77.5    -      -       +      +
    660A  ALA*     1.3    57.0    +      -       -      +
    662A  GLN*     3.1    20.8    +      -       -      +
    663A  ASN*     2.9    37.8    +      -       -      +
    727A  GLU*     5.4     9.3    +      -       -      -
    747A  ARG*     3.2    38.5    -      -       -      +
    749A  TRP*     4.4     4.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 660 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    445A  GLN*     4.5     9.4    -      -       +      +
    446A  ILE*     4.2    16.2    -      -       +      -
    449A  VAL*     3.9    20.8    -      -       +      +
    574A  TYR*     3.8    21.4    +      -       +      -
    656A  GLN      3.0    13.8    +      -       -      +
    657A  ALA      3.1     9.4    +      -       -      +
    659A  ARG*     1.3    77.0    -      -       -      +
    661A  TYR*     1.3    58.3    +      -       -      +
    663A  ASN*     3.4     6.3    +      -       -      +
    664A  TYR*     2.9    25.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 661 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    570A  ASN*     3.8     6.5    -      -       +      -
    571A  SER*     3.4    22.3    -      -       -      -
    574A  TYR*     3.5    36.1    -      +       +      -
    657A  ALA      2.9    12.7    +      -       -      +
    658A  TYR*     3.1    17.2    +      +       -      +
    660A  ALA*     1.3    74.3    -      -       -      +
    662A  GLN*     1.3    67.7    +      -       -      +
    664A  TYR*     2.9    17.4    +      +       -      +
    665A  ILE*     2.9    45.2    +      -       +      +
    671A  GLU*     2.8    31.3    +      -       -      +
    681A  HIS*     3.2    32.1    -      -       -      +
    682A  LYS*     4.5     7.9    -      -       +      -
    685A  PHE*     4.2    16.8    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 662 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    658A  TYR*     2.8    40.9    +      -       +      +
    659A  ARG*     3.1    29.0    +      -       -      +
    661A  TYR*     1.3    77.7    -      -       +      +
    663A  ASN*     1.3    62.2    +      -       -      +
    665A  ILE*     3.2     8.2    +      -       -      +
    666A  LYS*     3.0    28.5    +      -       -      +
    682A  LYS*     3.6    26.1    -      -       -      +
    727A  GLU*     5.1     4.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 663 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449A  VAL*     4.0    20.8    -      -       -      +
    452A  GLN*     4.7    11.3    +      -       -      -
    659A  ARG*     2.9    20.3    +      -       -      +
    660A  ALA*     3.6     8.1    -      -       -      +
    661A  TYR      3.1     0.2    -      -       -      -
    662A  GLN*     1.3    76.5    -      -       -      +
    664A  TYR*     1.3    66.5    +      -       -      +
    666A  LYS*     3.2    27.0    +      -       +      +
    667A  LYS*     3.0    24.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 664 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    445A  GLN*     5.1     2.0    -      -       -      +
    570A  ASN*     2.7    44.0    +      -       +      -
    574A  TYR*     3.7    27.1    -      +       +      +
    660A  ALA      2.9    13.8    +      -       -      +
    661A  TYR*     2.9    25.9    +      +       -      +
    663A  ASN*     1.3    75.9    -      -       -      +
    665A  ILE*     1.3    61.9    +      -       +      +
    667A  LYS*     3.2     2.6    +      -       -      +
    668A  ASN*     2.8    75.5    +      -       +      +
    669A  GLY      4.4     5.2    -      -       -      -
    671A  GLU*     4.3    11.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 665 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    661A  TYR*     2.9    55.7    +      -       +      +
    662A  GLN*     3.6     9.4    -      -       -      +
    663A  ASN      3.2     0.2    -      -       -      -
    664A  TYR*     1.3    74.2    -      -       +      +
    666A  LYS*     1.3    70.2    +      -       -      +
    669A  GLY*     2.7    34.3    +      -       -      +
    670A  GLU*     3.6    41.3    -      -       +      +
    671A  GLU*     4.9     1.6    -      -       +      +
    681A  HIS*     5.2     4.0    -      -       +      -
    682A  LYS*     5.4    13.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 666 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    662A  GLN      3.0    12.0    +      -       -      +
    663A  ASN*     3.2    32.3    +      -       -      +
    665A  ILE*     1.3    78.6    -      -       -      +
    667A  LYS*     1.3    63.0    +      -       +      +
    669A  GLY      4.3     1.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 667 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    663A  ASN      3.0    15.3    +      -       -      +
    664A  TYR*     4.8     0.7    -      -       -      +
    666A  LYS*     1.3    80.1    -      -       +      +
    668A  ASN*     1.3    88.4    +      -       -      +
    669A  GLY      3.7     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 668 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    664A  TYR*     2.8    62.9    +      -       +      +
    667A  LYS*     1.3   107.8    -      -       -      +
    669A  GLY*     1.3    61.8    +      -       -      +
    670A  GLU      5.3     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 669 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    664A  TYR*     4.4     8.0    -      -       -      -
    665A  ILE*     2.7    27.8    +      -       -      +
    666A  LYS      4.3     1.4    +      -       -      -
    667A  LYS      3.7     0.6    -      -       -      -
    668A  ASN*     1.3    86.2    -      -       -      +
    670A  GLU*     1.3    66.7    +      -       -      +
    671A  GLU*     4.8     0.2    -      -       -      +
----------------------------------------------------------
 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