Contacts of the helix formed by residues 9 - 33 (chain H) in PDB entry 1QGH


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 9 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8H  ASP*     1.3    70.8    -      -       -      +
     10H  LYS*     1.3    59.8    +      -       -      +
     12H  PHE*     3.0     3.5    +      -       +      +
     13H  LEU*     2.7    42.7    +      -       +      +
     67H  ILE*     3.8    16.2    -      -       +      -
    119H  LEU*     3.2    21.7    -      -       +      +
    120H  THR*     4.1     8.7    +      -       -      +
    123H  GLU*     2.9    28.3    +      -       -      +
    125H  ASP*     3.8    23.7    -      -       -      +
    128H  THR*     3.9    13.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 10 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      8H  ASP*     3.2    14.6    +      -       -      +
      9H  THR*     1.3    76.8    -      -       -      +
     11H  GLU*     1.3    68.9    +      -       -      +
     14H  ASN*     2.9    30.7    +      -       -      +
     64H  LEU*     3.7    18.5    -      -       +      +
     67H  ILE*     3.5    38.4    +      -       +      -
     68H  GLY*     3.8    14.7    +      -       -      -
     69H  GLY*     4.1    16.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 11 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7H  VAL*     3.9    18.2    -      -       +      +
      8H  ASP*     2.6    38.9    +      -       +      +
     10H  LYS*     1.3    82.6    -      -       -      +
     12H  PHE*     1.3    63.5    +      -       -      +
     14H  ASN*     4.0     5.0    +      -       -      +
     15H  HIS*     3.0    23.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 12 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7H  VAL*     4.0    19.0    -      -       +      +
      8H  ASP      2.7    16.2    +      -       -      +
      9H  THR*     3.4     9.4    -      -       +      +
     11H  GLU*     1.3    74.5    -      -       -      +
     13H  LEU*     1.3    80.7    +      -       +      +
     15H  HIS*     3.1    16.5    +      -       +      +
     16H  GLN*     3.1    48.0    +      -       +      +
    112H  GLU*     3.1    30.3    -      -       +      -
    113H  TYR*     3.9    11.0    -      +       -      -
    115H  GLN*     4.7     4.0    -      -       +      -
    116H  GLY*     3.5    26.0    -      -       -      -
    119H  LEU*     4.3    13.5    -      -       +      -
    128H  THR*     5.9     0.2    -      -       +      -
    132H  LEU*     4.0    20.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 13 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9H  THR*     2.7    28.2    +      -       +      +
     10H  LYS      3.7     3.4    -      -       -      +
     12H  PHE*     1.3    95.8    -      -       +      +
     14H  ASN*     1.3    58.3    +      -       -      +
     16H  GLN*     2.9    21.5    +      -       +      +
     17H  VAL*     2.9    11.0    +      -       -      +
     60H  VAL*     3.5    25.2    -      -       +      +
     63H  ARG*     4.2     6.1    -      -       +      -
     64H  LEU*     4.1    23.8    -      -       +      +
     67H  ILE*     3.9    17.7    -      -       +      -
    128H  THR*     3.7    32.8    -      -       +      -
    131H  MET*     4.4    10.8    -      -       +      -
    132H  LEU*     4.4     3.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 14 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10H  LYS      2.9    16.7    +      -       -      +
     11H  GLU*     4.1     5.6    +      -       -      +
     13H  LEU*     1.3    76.2    -      -       -      +
     15H  HIS*     1.3    62.1    +      -       -      +
     17H  VAL*     3.2     6.1    +      -       -      +
     18H  ALA      3.2    16.8    +      -       -      -
     64H  LEU*     3.6    14.0    -      -       +      +
     70H  SER      3.1    20.6    +      -       -      -
     71H  PRO*     3.1     6.9    -      -       -      +
     72H  PHE*     2.7    73.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 15 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      7H  VAL*     6.1     2.0    -      -       +      -
     11H  GLU      3.0    14.6    +      -       -      +
     12H  PHE*     3.1    13.9    +      -       +      +
     14H  ASN*     1.3    77.3    -      -       -      +
     16H  GLN*     1.3    61.9    +      -       -      +
     18H  ALA*     3.3     5.4    +      -       -      +
     19H  ASN*     3.0    27.8    +      -       -      -
     72H  PHE*     4.3     6.0    -      -       -      -
     81H  ASN*     2.9    32.2    +      -       +      -
     83H  SER*     2.8    40.0    +      -       -      -
    112H  GLU*     3.1    20.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 16 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12H  PHE*     3.4    49.4    -      -       +      +
     13H  LEU*     2.9     7.6    +      -       +      +
     15H  HIS*     1.3    83.1    +      -       -      +
     17H  VAL*     1.3    66.3    +      -       -      +
     19H  ASN*     3.0    20.4    +      -       -      +
     20H  LEU*     2.7    40.0    +      -       +      +
     60H  VAL*     4.3    11.9    -      -       +      -
    109H  LEU*     3.7     4.7    -      -       -      +
    112H  GLU*     2.9    29.1    +      -       -      +
    113H  TYR*     3.6    24.5    -      -       +      +
    132H  LEU*     5.9     0.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 17 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32F  TRP*     4.4    11.9    -      -       +      -
     13H  LEU      2.9    18.6    +      -       -      +
     14H  ASN*     3.2    19.9    +      -       -      +
     16H  GLN*     1.3    77.0    -      -       -      +
     18H  ALA*     1.3    65.1    +      -       -      +
     20H  LEU*     3.4     4.1    +      -       -      +
     21H  ASN*     2.9    33.9    +      -       -      +
     57H  MET*     4.5     6.1    -      -       -      +
     60H  VAL*     3.8    16.8    -      -       +      +
     61H  ALA*     3.9    21.5    -      -       +      +
     64H  LEU*     4.9     2.5    -      -       +      -
     71H  PRO*     4.6     3.8    -      -       +      -
     72H  PHE*     3.9    12.6    -      -       +      +
     78H  PHE*     3.7    22.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 18 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14H  ASN      3.2     7.2    +      -       -      +
     15H  HIS      3.4     8.7    -      -       -      +
     17H  VAL*     1.3    78.5    -      -       -      +
     19H  ASN*     1.3    63.6    +      -       -      +
     21H  ASN*     3.1    13.3    +      -       -      +
     22H  VAL*     3.2    15.4    +      -       -      +
     72H  PHE*     4.2     3.6    -      -       +      -
     78H  PHE*     3.6    38.8    -      -       -      +
     81H  ASN*     3.9    14.4    -      -       +      -
     82H  ALA*     3.7    14.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 19 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15H  HIS*     3.0    16.8    +      -       -      +
     16H  GLN*     3.0    29.2    +      -       -      +
     18H  ALA*     1.3    75.7    -      -       -      +
     20H  LEU*     1.3    58.0    +      -       -      +
     22H  VAL*     3.2     3.8    +      -       -      +
     23H  PHE*     2.8    30.8    +      -       -      +
     82H  ALA*     3.4     4.6    -      -       -      -
     83H  SER*     2.7    46.9    +      -       -      -
     84H  VAL*     3.0    24.5    +      -       +      +
    108H  LEU*     4.1     3.6    -      -       -      +
    109H  LEU*     4.1     6.2    -      -       +      +
    112H  GLU*     3.1    13.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 20 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     16H  GLN*     2.7    30.4    +      -       +      +
     19H  ASN*     1.3    73.1    -      -       -      +
     21H  ASN*     1.3    57.5    +      -       -      +
     23H  PHE*     3.6     4.8    -      -       +      +
     24H  THR*     2.8    33.0    +      -       -      -
     53H  PHE*     4.2    25.7    -      -       +      +
     56H  GLN*     4.1     7.6    -      -       +      +
     57H  MET*     3.5    44.2    -      -       +      +
     60H  VAL*     4.1    10.8    -      -       +      -
    109H  LEU*     4.2    26.5    -      -       +      -
    113H  TYR*     3.5    26.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 21 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     25F  VAL*     4.5     7.8    -      -       -      +
     28F  HIS*     5.4     1.6    -      -       -      -
     50F  TYR*     5.4     1.4    +      -       -      -
     75F  LEU*     4.3     4.1    -      -       +      +
     17H  VAL*     2.9    25.5    +      -       -      +
     18H  ALA      3.5     6.1    -      -       -      +
     20H  LEU*     1.3    77.4    -      -       -      +
     22H  VAL*     1.3    62.2    +      -       -      +
     24H  THR*     3.2    25.1    -      -       -      +
     25H  VAL*     3.4    12.5    +      -       -      +
     57H  MET*     3.3    35.6    -      -       -      +
     78H  PHE*     3.2    52.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 22 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75F  LEU*     4.2    24.0    -      -       +      -
     18H  ALA      3.2     4.9    +      -       -      +
     19H  ASN      3.2     6.8    +      -       -      +
     21H  ASN*     1.3    73.0    -      -       -      +
     23H  PHE*     1.3    66.0    +      -       -      +
     25H  VAL*     3.2     4.9    +      -       -      +
     26H  LYS*     2.9    21.6    +      -       -      +
     78H  PHE*     4.6     3.8    -      -       +      +
     79H  LEU*     5.0     6.7    -      -       +      -
     82H  ALA*     3.5    28.0    -      -       +      -
     84H  VAL*     3.5    32.1    -      -       +      +
     85H  GLU      4.6     0.2    -      -       -      +
     86H  GLU*     4.0    30.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 23 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19H  ASN      2.8    17.9    +      -       -      +
     20H  LEU*     3.6     8.1    -      -       +      +
     22H  VAL*     1.3    76.3    -      -       -      +
     24H  THR*     1.3    65.0    +      -       -      +
     26H  LYS*     2.9    14.5    +      -       +      +
     27H  ILE*     2.9    37.8    +      -       +      +
     49H  LEU*     5.3     0.9    -      -       +      -
     53H  PHE*     3.8    43.7    -      +       +      -
     84H  VAL*     4.3     4.5    -      -       +      +
    102H  LEU*     3.5    34.1    -      -       +      -
    105H  THR*     3.4    31.0    -      -       +      -
    106H  LEU*     3.7    18.2    -      -       +      -
    109H  LEU*     3.6    18.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 24 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     50F  TYR*     5.8     3.4    -      -       -      +
     20H  LEU      2.8    15.0    +      -       -      +
     21H  ASN*     3.2    23.6    -      -       -      +
     23H  PHE*     1.3    78.9    -      -       -      +
     25H  VAL*     1.3    72.8    +      -       +      +
     27H  ILE*     3.2    19.4    +      -       -      +
     28H  HIS      3.2     9.0    +      -       -      -
     50H  TYR*     3.5    49.1    +      -       +      +
     53H  PHE*     4.7     4.6    -      -       -      +
     54H  GLY*     4.3    12.4    +      -       -      -
     57H  MET*     6.1     3.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 25 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21F  ASN*     4.5     8.3    -      -       -      +
     73F  SER*     3.7    22.6    -      -       -      +
     74F  THR*     3.9     7.4    -      -       -      -
     75F  LEU*     3.8    17.0    -      -       +      -
     78F  PHE*     3.6    33.4    -      -       +      -
     21H  ASN      3.4    12.6    -      -       -      +
     22H  VAL      3.2     7.5    +      -       -      +
     24H  THR*     1.3    79.5    -      -       +      +
     26H  LYS*     1.3    67.6    +      -       -      +
     28H  HIS*     3.1    14.2    +      -       +      +
     29H  GLN*     2.9    20.3    +      -       -      +
     50H  TYR*     6.1     0.2    -      -       -      +
     86H  GLU*     4.8     1.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 26 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73F  SER      5.4     0.9    -      -       -      -
     22H  VAL*     2.9    12.7    +      -       +      +
     23H  PHE*     3.3    19.5    -      -       +      +
     25H  VAL*     1.3    79.7    -      -       -      +
     27H  ILE*     1.3    61.8    +      -       -      +
     29H  GLN*     3.1    17.7    +      -       -      +
     30H  ILE*     3.0    33.4    +      -       +      +
     84H  VAL*     4.3    11.0    -      -       -      -
     85H  GLU      2.9    29.4    +      -       -      -
     86H  GLU*     4.1    11.6    -      -       +      +
     87H  ALA      4.9     2.4    -      -       -      +
    101H  ASP*     3.1    38.8    +      -       -      +
    102H  LEU*     5.2     0.2    -      -       -      -
    105H  THR*     3.6    24.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 27 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     23H  PHE*     2.9    54.1    +      -       +      +
     24H  THR*     3.4    14.6    -      -       -      +
     25H  VAL      3.1     0.2    -      -       -      -
     26H  LYS*     1.3    76.5    -      -       -      +
     28H  HIS*     1.3    62.3    +      -       -      +
     30H  ILE*     3.3    11.3    +      -       +      +
     31H  HIS*     3.0    22.8    +      -       +      +
     46H  MET*     3.2    40.0    -      -       +      +
     49H  LEU*     3.9    31.6    -      -       +      +
     50H  TYR*     3.9    11.0    -      -       +      +
     53H  PHE*     4.5     3.1    -      -       +      -
    102H  LEU*     4.9     6.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 28 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     21F  ASN*     5.4     1.3    -      -       -      -
     54F  GLY      5.3     1.2    +      -       -      -
     57F  MET*     3.5    30.8    -      -       +      +
     58F  ASP*     3.6    27.6    +      -       +      +
     24H  THR      3.2     3.7    +      -       -      +
     25H  VAL*     3.1    14.9    +      -       +      +
     27H  ILE*     1.3    75.9    -      -       -      +
     29H  GLN*     1.3    66.8    +      -       -      +
     31H  HIS*     3.1    14.6    +      +       -      +
     32H  TRP*     2.8    48.2    +      +       +      -
     47H  ASP*     4.9     5.4    +      -       -      -
     50H  TYR*     3.0    54.3    +      +       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 29 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73F  SER*     3.0    47.6    +      -       -      +
     74F  THR*     4.1     1.0    -      -       -      +
     25H  VAL      2.9    12.8    +      -       -      +
     26H  LYS*     3.3    19.6    -      -       -      +
     28H  HIS*     1.3    77.6    -      -       -      +
     30H  ILE*     1.3    67.9    +      -       -      +
     32H  TRP*     4.3     3.1    -      -       -      -
     33H  TYR*     3.0    35.0    +      -       +      +
     87H  ALA      3.2    27.0    +      -       -      +
     89H  TYR*     4.0    21.7    +      -       +      +
     93H  LYS*     4.6    13.1    -      -       -      +
     98H  LEU*     5.4     3.1    -      -       +      +
    101H  ASP*     4.7     8.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 30 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     26H  LYS*     3.0    25.9    +      -       +      +
     27H  ILE*     3.6     9.0    -      -       -      +
     29H  GLN*     1.3    81.4    -      -       +      +
     31H  HIS*     1.3    58.5    -      -       -      +
     33H  TYR*     5.2     0.2    -      -       -      -
     34H  MET*     3.0    49.9    +      -       +      +
     46H  MET*     4.1     7.2    -      -       +      -
     98H  LEU*     3.9    46.9    -      -       +      +
     99H  MET*     3.5    24.5    -      -       +      -
    101H  ASP*     5.3     4.0    -      -       -      +
    102H  LEU*     4.0    28.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 31 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58F  ASP*     3.6     6.3    -      -       -      -
     62F  GLU*     3.1     2.4    +      -       -      -
     27H  ILE*     3.0    18.7    +      -       +      +
     28H  HIS*     3.2    16.2    -      -       -      +
     30H  ILE*     1.3    79.2    -      -       -      +
     32H  TRP*     1.3    82.0    -      +       -      +
     34H  MET*     3.8    11.1    -      -       -      +
     43H  HIS*     2.9    80.9    +      +       -      -
     46H  MET*     3.8    16.9    -      -       +      +
     47H  ASP*     3.4    20.6    +      -       -      -
    144K  TRP*     4.6     1.0    -      -       -      -
    157K   FE      2.4    28.4    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 32 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     17F  VAL*     4.5     4.3    -      -       +      -
     21F  ASN*     5.0     2.2    -      -       -      -
     57F  MET*     3.8    27.8    -      -       +      -
     58F  ASP*     2.6    28.5    +      -       -      -
     61F  ALA*     3.5    26.9    -      -       +      +
     62F  GLU*     3.9    17.6    +      -       +      +
     65F  LEU*     3.5    31.7    -      -       +      +
     71F  PRO*     3.9    16.8    -      -       +      -
     72F  PHE      3.6    20.2    -      -       -      -
     73F  SER*     4.1    16.4    -      -       -      -
     78F  PHE*     5.0     3.1    -      +       -      -
     25H  VAL*     6.1     0.2    -      -       +      -
     28H  HIS*     2.8    43.2    +      +       +      +
     29H  GLN*     3.8     2.5    -      -       -      +
     31H  HIS*     1.3    93.2    -      +       -      +
     33H  TYR*     1.3    67.4    +      -       +      +
     34H  MET*     3.5     2.5    +      -       -      +
    144K  TRP*     3.9    12.6    +      +       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 33 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65F  LEU*     4.6     6.1    -      -       +      -
     70F  SER*     3.2    24.3    +      -       -      -
     71F  PRO*     2.4    52.6    +      -       +      -
     73F  SER*     3.6    24.2    +      -       -      -
     29H  GLN*     3.0    28.0    +      -       +      +
     30H  ILE*     5.1     0.9    -      -       -      -
     32H  TRP*     1.3    80.7    -      -       +      +
     34H  MET*     1.3    68.9    +      -       -      +
     35H  ARG*     3.5    12.2    +      -       -      +
     89H  TYR*     3.4    70.0    +      +       +      +
     93H  LYS      5.4     0.9    -      -       -      +
     98H  LEU*     4.7     2.6    -      -       +      +
----------------------------------------------------------
 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