Contacts of the helix formed by residues 92 - 119 (chain B) in PDB entry 1IES


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 92 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  PHE*     4.1    11.9    -      -       -      -
     44B  LEU*     3.9     5.9    -      -       -      +
     47B  VAL*     3.8    34.2    -      -       +      +
     51B  PHE*     6.1     0.2    -      -       +      -
     91B  THR*     1.3    69.1    -      -       -      +
     93B  LEU*     1.3    57.3    +      -       -      +
     95B  ALA*     3.4     1.5    +      -       +      +
     96B  MET*     2.8    35.4    +      -       +      +
    151B  ILE*     3.7    24.9    -      -       +      -
    163B  GLU*     2.8    33.2    +      -       -      +
    166B  PHE*     4.1    15.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 93 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  THR*     3.1     9.6    +      -       -      +
     92B  THR*     1.3    74.9    -      -       -      +
     94B  ASP*     1.3    71.4    +      -       -      +
     96B  MET*     3.9     0.5    -      -       -      +
     97B  LYS*     3.0    51.3    +      -       +      +
    148B  LEU*     3.4    28.7    -      -       +      -
    151B  ILE*     4.2    24.7    -      -       +      +
    152B  GLN*     3.8    28.7    -      -       +      +
    155B  VAL*     4.6    20.2    -      -       +      -
    163B  GLU*     5.7     0.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 94 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86B  GLN*     6.3     0.4    -      -       -      +
     89B  TRP      3.4    17.0    -      -       -      +
     90B  GLY*     3.8     6.1    -      -       -      -
     91B  THR*     2.9    32.1    +      -       -      +
     93B  LEU*     1.3    82.9    -      -       -      +
     95B  ALA*     1.3    61.9    +      -       -      +
     97B  LYS*     3.2    12.5    +      -       -      +
     98B  ALA*     2.9    23.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 95 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  LEU*     3.6    25.5    -      -       +      +
     37B  PHE*     3.6    32.8    -      -       +      -
     51B  PHE*     3.9    10.9    -      -       +      -
     89B  TRP*     3.7     7.3    +      -       -      +
     91B  THR      2.8     7.4    +      -       -      +
     92B  THR*     3.8     3.6    -      -       -      +
     94B  ASP*     1.3    76.2    -      -       -      +
     96B  MET*     1.3    55.4    +      -       -      +
     98B  ALA*     3.3     6.6    +      -       -      +
     99B  ALA*     2.9    28.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 96 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  VAL*     5.6     0.9    -      -       +      -
     50B  PHE*     3.5    40.4    -      -       +      -
     51B  PHE*     4.4     8.0    -      -       +      -
     92B  THR*     2.8    24.4    +      -       +      +
     93B  LEU      3.9     2.9    -      -       -      +
     95B  ALA*     1.3    67.7    -      -       -      +
     97B  LYS*     1.3    65.8    +      -       -      +
     99B  ALA*     3.2     4.3    +      -       -      +
    100B  ILE*     2.9    27.1    +      -       -      +
    144B  MET*     4.5    13.4    -      -       -      +
    147B  HIS*     3.7    32.3    -      -       +      -
    148B  LEU*     4.0    18.3    -      -       +      +
    151B  ILE*     3.4    25.6    -      -       +      -
    166B  PHE*     4.6     8.1    -      -       +      -
    171B  LEU*     5.0     4.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 97 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93B  LEU*     3.0    44.1    +      -       +      +
     94B  ASP*     3.4    12.1    +      -       -      +
     96B  MET*     1.3    74.4    -      -       -      +
     98B  ALA*     1.3    64.4    +      -       -      +
    100B  ILE*     3.1    26.1    -      -       +      +
    101B  VAL*     3.2    13.7    +      -       -      +
    148B  LEU*     3.6    14.4    -      -       +      -
    152B  GLN*     3.8    23.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 98 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33B  LEU*     5.5     3.1    -      -       +      -
     86B  GLN*     5.2     4.5    -      -       -      +
     89B  TRP*     4.4    25.6    -      -       +      -
     94B  ASP      2.9    13.5    +      -       -      +
     95B  ALA*     3.5    10.5    -      -       -      +
     97B  LYS*     1.3    76.1    -      -       -      +
     99B  ALA*     1.3    57.9    +      -       -      +
    101B  VAL*     3.4     8.5    +      -       -      +
    102B  LEU*     2.9    26.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 99 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  TYR*     3.7    18.1    +      -       +      +
     33B  LEU*     5.0     3.8    -      -       +      +
     51B  PHE*     3.7    26.5    -      -       +      -
     95B  ALA      2.9    17.3    +      -       -      +
     96B  MET*     3.2     6.5    +      -       -      +
     98B  ALA*     1.3    75.5    -      -       -      +
    100B  ILE*     1.3    57.1    +      -       -      +
    102B  LEU*     2.9     8.9    +      -       -      +
    103B  GLU*     2.8    29.8    +      -       -      +
    144B  MET*     4.0    13.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 100 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  GLN*     4.4    12.8    -      -       +      +
      4A  ILE*     4.1    18.2    -      -       +      -
     96B  MET      2.9    18.6    +      -       -      +
     97B  LYS*     3.1    21.8    -      -       -      +
     99B  ALA*     1.3    71.8    -      -       -      +
    101B  VAL*     1.3    61.9    +      -       +      +
    103B  GLU*     3.2     2.6    +      -       -      +
    104B  LYS*     2.8    44.7    +      -       +      +
    141B  ILE*     4.2    11.9    -      -       +      +
    144B  MET*     4.0    17.2    -      -       +      -
    145B  GLY*     4.0    24.2    -      -       -      +
    148B  LEU*     4.1    20.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 101 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97B  LYS*     3.2    14.5    +      -       +      +
     98B  ALA*     3.5    11.0    -      -       -      +
    100B  ILE*     1.3    79.2    -      -       +      +
    102B  LEU*     1.3    64.8    +      -       -      +
    104B  LYS*     3.4     9.7    +      -       +      +
    105B  SER*     3.1    23.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 102 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22B  LEU      5.9     0.2    -      -       -      +
     26B  ALA*     4.2    22.2    -      -       +      -
     29B  THR*     3.8    34.1    -      -       +      +
     30B  TYR*     3.8    30.5    -      -       +      +
     33B  LEU*     5.5     0.2    -      -       +      -
     98B  ALA      2.9    14.8    +      -       -      +
     99B  ALA*     2.9    10.3    +      -       -      +
    101B  VAL*     1.3    77.6    -      -       -      +
    103B  GLU*     1.3    63.4    +      -       -      +
    105B  SER*     2.9    28.4    +      -       -      +
    106B  LEU*     3.1    12.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 103 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     30B  TYR*     2.6    30.2    +      -       -      +
     58B  LYS*     2.8    35.0    +      -       -      -
     99B  ALA      2.8    15.3    +      -       -      +
    100B  ILE*     3.7     7.2    -      -       -      +
    102B  LEU*     1.3    71.1    -      -       -      +
    104B  LYS*     1.3    58.6    +      -       -      +
    106B  LEU*     3.1    11.7    +      -       -      +
    107B  ASN*     2.7    30.1    +      -       -      +
    137B  GLU*     2.7    30.4    -      -       -      +
    140B  LEU*     3.4    23.7    -      -       +      +
    141B  ILE*     3.8    15.3    -      -       +      -
    144B  MET*     3.9    11.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 104 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      3A  GLN      3.1    28.4    +      -       -      -
      4A  ILE*     4.0    18.8    -      -       -      +
      5A  ARG      4.6     7.7    +      -       -      -
      6A  GLN*     2.9    45.4    +      -       -      +
    100B  ILE*     2.8    36.8    +      -       +      +
    101B  VAL*     3.5    11.0    -      -       -      +
    103B  GLU*     1.3    76.0    -      -       -      +
    105B  SER*     1.3    56.4    +      -       -      +
    107B  ASN*     3.3     0.8    +      -       -      -
    108B  GLN*     2.9    14.8    +      -       -      +
    141B  ILE*     4.2    10.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 105 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22B  LEU*     4.8     4.6    -      -       -      +
    101B  VAL*     3.1    10.3    +      -       -      -
    102B  LEU*     2.9    25.7    +      -       -      +
    104B  LYS*     1.3    74.5    -      -       -      +
    106B  LEU*     1.3    69.0    +      -       -      +
    108B  GLN*     3.3     8.4    +      -       -      +
    109B  ALA*     3.0    22.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 106 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  LEU*     4.8     0.7    -      -       -      +
     22B  LEU*     3.9    42.6    -      -       +      +
     23B  TYR*     4.2    21.3    -      -       +      +
     26B  ALA*     3.9    13.9    -      -       +      -
     58B  LYS*     3.8    38.8    -      -       +      +
    102B  LEU*     3.1    13.1    +      -       +      +
    103B  GLU*     3.4    18.8    -      -       -      +
    105B  SER*     1.3    82.1    +      -       -      +
    107B  ASN*     1.3    62.5    +      -       -      +
    109B  ALA*     3.2     7.8    +      -       -      +
    110B  LEU*     3.1    27.2    +      -       -      +
    137B  GLU*     4.6     4.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 107 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  GLN*     2.9    29.0    -      -       -      +
     72A  ARG*     5.9     0.7    +      -       -      -
    103B  GLU      2.7    19.4    +      -       -      +
    104B  LYS      3.5     0.9    -      -       -      +
    106B  LEU*     1.3    71.7    -      -       -      +
    108B  GLN*     1.3    64.5    +      -       -      +
    110B  LEU*     3.2    11.5    +      -       -      +
    111B  LEU*     3.0    37.4    +      -       -      +
    134B  LEU*     4.5     7.7    +      -       -      +
    137B  GLU*     3.3    33.1    -      -       +      +
    138B  VAL*     4.8    10.8    -      -       -      +
    141B  ILE*     4.0     9.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 108 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  GLN*     3.6    19.9    +      -       -      +
      7A  ASN*     5.5     2.1    -      -       -      +
    104B  LYS      2.9    13.5    +      -       -      +
    105B  SER*     3.6    11.4    -      -       -      +
    107B  ASN*     1.3    75.7    -      -       -      +
    109B  ALA*     1.3    56.0    +      -       -      +
    111B  LEU*     3.4    20.6    +      -       -      +
    112B  ASP*     2.8    53.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 109 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  ARG*     3.8    19.5    +      -       -      +
     19B  LEU*     3.6    23.1    -      -       +      +
     22B  LEU*     3.7    22.2    -      -       +      -
    105B  SER      3.0     9.5    +      -       -      +
    106B  LEU      3.2     9.8    +      -       -      +
    108B  GLN*     1.3    74.2    -      -       -      +
    110B  LEU*     1.3    57.7    +      -       -      +
    112B  ASP*     3.3     7.8    +      -       -      +
    113B  LEU*     2.9    28.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 110 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     19B  LEU*     3.7    24.9    -      -       +      -
     23B  TYR*     3.7    19.3    -      -       +      +
    106B  LEU      3.1    15.3    +      -       -      +
    107B  ASN*     3.2    10.1    +      -       -      +
    109B  ALA*     1.3    71.4    -      -       -      +
    111B  LEU*     1.3    54.4    +      -       -      +
    113B  LEU*     3.0     6.8    +      -       -      +
    114B  HIS*     2.7    36.1    +      -       -      +
    129B  LEU*     3.9    14.4    -      -       +      +
    133B  PHE*     3.6    41.5    -      -       +      +
    134B  LEU*     3.7    17.7    -      -       +      -
    137B  GLU*     3.9    26.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 111 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      6A  GLN*     4.8     5.6    -      -       -      +
      7A  ASN*     3.7    37.9    -      -       +      +
    123A  PRO*     3.7    25.7    -      -       +      +
    124A  HIS*     5.7     1.8    -      -       +      +
    107B  ASN*     3.0    32.2    +      -       -      +
    108B  GLN*     3.4    29.8    -      -       -      +
    110B  LEU*     1.3    75.8    -      -       -      +
    112B  ASP*     1.3    57.8    +      -       -      +
    114B  HIS*     3.2     6.9    +      -       -      +
    115B  ALA*     2.9    28.1    +      -       -      +
    134B  LEU*     4.2    15.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 112 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18B  ARG*     5.3     5.4    +      -       -      +
    108B  GLN*     2.8    49.8    +      -       -      +
    109B  ALA*     3.7     8.4    -      -       -      +
    111B  LEU*     1.3    71.7    -      -       -      +
    113B  LEU*     1.3    60.8    +      -       -      +
    115B  ALA*     3.5     7.1    +      -       -      +
    116B  LEU*     3.1    20.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 113 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  VAL*     4.4     7.6    -      -       +      -
     15B  ALA*     3.5    32.1    -      -       +      +
     16B  VAL*     4.3    18.6    -      -       +      +
     18B  ARG*     6.1     2.2    -      -       -      +
     19B  LEU*     3.5    30.1    -      -       +      -
     65B  LEU*     5.2     0.9    -      -       +      -
    109B  ALA      2.9    14.2    +      -       -      +
    110B  LEU*     3.5     8.1    -      -       -      +
    112B  ASP*     1.3    72.2    -      -       -      +
    114B  HIS*     1.3    66.5    +      -       -      +
    116B  LEU*     3.1    14.0    +      -       +      +
    117B  GLY*     2.8    20.3    +      -       -      -
    125B  LEU*     3.9    16.6    -      -       +      +
    129B  LEU*     3.8    22.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 114 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  PRO*     3.5    32.3    -      -       +      +
    110B  LEU      2.7    16.7    +      -       -      +
    111B  LEU*     3.4    13.2    -      -       -      +
    113B  LEU*     1.3    73.1    -      -       -      +
    115B  ALA*     1.3    61.9    +      -       -      +
    117B  GLY*     3.1     3.9    +      -       -      +
    118B  SER*     3.0    26.8    +      -       -      -
    125B  LEU*     5.2     0.2    -      -       -      -
    126B  CYS*     3.7    37.6    -      -       +      +
    129B  LEU*     3.7    13.4    -      -       +      +
    130B  GLU*     2.9    27.8    +      -       -      -
    134B  LEU*     3.9    14.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 115 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  ALA*     6.5     0.7    -      -       +      -
    111B  LEU      2.9    16.7    +      -       -      +
    112B  ASP*     3.6     9.6    -      -       -      +
    114B  HIS*     1.3    76.8    +      -       -      +
    116B  LEU*     1.3    60.6    +      -       -      +
    118B  SER*     2.9    20.4    +      -       -      -
    119B  ALA*     2.9    14.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 116 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11B  GLU*     3.6    36.1    -      -       +      +
     12B  VAL*     3.9    12.6    -      -       +      -
     15B  ALA*     3.9    17.9    -      -       +      -
    112B  ASP      3.1    11.5    +      -       -      +
    113B  LEU*     3.1    11.8    +      -       +      +
    115B  ALA*     1.3    77.7    -      -       -      +
    117B  GLY*     1.3    53.7    +      -       -      +
    119B  ALA*     3.0     8.7    +      -       +      +
    120B  GLN*     2.8    64.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 117 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     12B  VAL*     4.5     4.0    -      -       -      +
    113B  LEU      2.8    13.7    +      -       -      -
    114B  HIS      3.1     4.2    +      -       -      -
    116B  LEU*     1.3    72.1    -      -       -      +
    118B  SER*     1.3    54.1    +      -       -      +
    120B  GLN      3.5     0.3    +      -       -      -
    121B  ALA      3.0     6.8    +      -       -      -
    122B  ASP*     2.6    37.8    +      -       -      +
    125B  LEU*     3.7    25.0    -      -       -      +
    126B  CYS*     3.7    10.8    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 118 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114B  HIS*     3.0    19.2    +      -       -      -
    115B  ALA*     2.9    19.1    +      -       -      -
    117B  GLY*     1.3    71.9    -      -       -      +
    119B  ALA*     1.3    63.3    +      -       -      +
    121B  ALA*     2.8    16.3    +      -       -      +
    122B  ASP      4.7     0.2    -      -       -      +
    126B  CYS*     3.5    12.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 119 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115B  ALA      2.9    15.0    +      -       -      +
    116B  LEU*     3.0    13.7    +      -       +      +
    118B  SER*     1.3    75.9    -      -       -      +
    120B  GLN*     1.3    69.6    +      -       +      +
    121B  ALA*     3.3     1.9    +      -       -      +
----------------------------------------------------------
 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