Contacts of the helix formed by residues 59 - 86 (chain B) in PDB entry 1TAD


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 LEU 59 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  SER*     1.3    71.9    -      -       -      +
     60B  GLU*     1.3    81.3    +      -       -      +
     62B  CYS*     3.1     4.6    +      -       -      +
     63B  LEU*     3.0    43.2    +      -       +      +
    164B  VAL*     3.9    29.6    -      -       +      -
    353B  CAC      4.0    17.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 60 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     58B  SER*     3.2    12.1    +      -       -      +
     59B  LEU*     1.3   102.0    +      -       -      +
     61B  GLU*     1.3    61.3    +      -       +      +
     63B  LEU*     3.5    21.5    +      -       +      +
     64B  GLU*     3.4    22.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 61 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  PRO*     5.1    10.6    -      -       -      +
     50B  LYS*     2.9    35.5    +      -       -      -
     56B  GLY      3.7     1.0    -      -       -      +
     57B  TYR*     4.0    12.1    -      -       +      -
     58B  SER*     3.0    35.5    +      -       -      +
     60B  GLU*     1.3    76.7    -      -       +      +
     62B  CYS*     1.3    63.5    +      -       -      +
     64B  GLU*     3.2    20.9    +      -       -      +
     65B  PHE*     3.2    18.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 62 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57B  TYR*     3.7    18.8    -      -       -      -
     58B  SER      3.0    10.7    +      -       -      -
     59B  LEU      3.5     4.7    -      -       -      +
     61B  GLU*     1.3    77.0    -      -       -      +
     63B  LEU*     1.3    61.9    +      -       -      +
     65B  PHE*     3.0    27.2    +      -       -      +
    164B  VAL*     4.7     0.2    -      -       +      -
    165B  PRO*     3.5    18.8    -      -       +      +
    167B  GLU*     6.0     0.4    -      -       -      -
    170B  VAL*     4.6     8.7    -      -       -      -
    353B  CAC      2.2    64.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 63 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     59B  LEU*     3.0    35.6    +      -       +      +
     60B  GLU*     3.7    18.6    -      -       +      +
     61B  GLU      3.3     0.2    -      -       -      -
     62B  CYS*     1.3    74.9    -      -       -      +
     64B  GLU*     1.3    63.6    +      -       -      +
     66B  ILE*     3.1    44.9    +      -       +      +
     67B  ALA      4.6     0.9    +      -       -      -
    164B  VAL*     4.1    30.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 64 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     60B  GLU*     3.4    18.1    -      -       -      +
     61B  GLU*     3.2    14.3    +      -       -      +
     63B  LEU*     1.3    80.2    -      -       -      +
     65B  PHE*     1.3    65.0    +      -       +      +
     66B  ILE      3.5     0.5    +      -       -      -
     67B  ALA*     4.0     9.7    +      -       -      +
     68B  ILE*     3.9    12.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 65 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47B  LYS*     4.0    12.6    -      -       -      -
     57B  TYR*     3.8    20.0    -      +       -      -
     61B  GLU*     3.2    27.8    -      -       +      -
     62B  CYS*     3.0    13.7    +      -       -      +
     64B  GLU*     1.3    81.0    -      -       +      +
     66B  ILE*     1.3    57.4    +      -       -      +
     67B  ALA      3.3     0.2    -      -       -      -
     68B  ILE*     3.1    14.3    +      -       +      +
     69B  ILE*     2.8    45.8    +      -       +      +
    165B  PRO*     4.4     0.2    -      -       +      -
    170B  VAL*     3.6    39.0    -      -       +      -
    173B  SER*     3.4    30.1    -      -       -      -
    175B  VAL*     6.0     2.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 66 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  LEU*     3.1    36.9    +      -       +      +
     65B  PHE*     1.3    77.6    -      -       -      +
     67B  ALA*     1.3    60.3    +      -       -      +
     69B  ILE*     3.2     3.9    +      -       -      +
     70B  TYR*     2.9    63.0    +      -       +      +
    113B  GLY      5.1     0.4    -      -       -      +
    163B  TYR*     3.6    26.5    -      -       +      +
    165B  PRO*     3.6    24.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 67 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63B  LEU      4.6     0.8    +      -       -      -
     64B  GLU      4.0     8.1    +      -       -      +
     65B  PHE      3.3     0.4    -      -       -      -
     66B  ILE*     1.3    79.8    -      -       -      +
     68B  ILE*     1.3    60.9    -      -       +      +
     71B  GLY*     3.0    22.9    +      -       -      -
    112B  GLU      5.3     0.7    -      -       -      +
    113B  GLY*     3.5    34.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 68 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64B  GLU      3.9    16.6    -      -       -      +
     65B  PHE*     3.1    20.3    +      -       +      +
     67B  ALA*     1.3    79.0    -      -       +      +
     69B  ILE*     1.3    54.9    +      -       -      +
     71B  GLY*     3.2     2.3    +      -       -      -
     72B  ASN*     2.8    47.1    +      -       -      +
    173B  SER*     3.9    13.0    -      -       -      -
    174B  ARG      3.7    11.7    -      -       -      +
    175B  VAL*     3.7    33.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 69 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65B  PHE*     2.8    29.5    +      -       +      +
     66B  ILE*     3.7     4.0    -      -       -      +
     68B  ILE*     1.3    72.4    -      -       -      +
     70B  TYR*     1.3    63.3    +      -       +      +
     72B  ASN*     3.2     7.6    +      -       -      +
     73B  THR*     2.8    33.7    +      -       -      +
    151B  TYR*     3.6    38.6    -      -       +      +
    158B  LEU*     4.0    16.4    -      -       +      -
    163B  TYR*     3.5    25.8    -      -       +      +
    165B  PRO*     3.8    21.5    -      -       +      -
    169B  ASP*     3.9    16.4    -      -       +      +
    173B  SER*     4.4     7.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 70 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     66B  ILE*     2.9    34.1    +      -       +      +
     67B  ALA      4.1     0.2    -      -       -      +
     69B  ILE*     1.3    81.2    -      -       +      +
     71B  GLY*     1.3    58.6    +      -       -      +
     73B  THR*     3.5     7.0    +      -       -      -
     74B  LEU*     2.9    30.1    +      -       -      +
    113B  GLY*     3.3    31.2    -      -       -      +
    114B  THR*     4.0     7.3    -      -       -      +
    115B  MET*     3.7    40.9    -      -       +      +
    155B  LEU*     5.9     1.1    -      -       +      -
    158B  LEU*     2.7    42.6    +      -       +      -
    159B  VAL*     4.1     8.4    -      -       +      -
    160B  THR      5.3     0.2    +      -       -      -
    163B  TYR*     3.6    18.4    -      +       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 71 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67B  ALA      3.0    15.7    +      -       -      -
     68B  ILE*     3.5     3.1    -      -       -      -
     70B  TYR*     1.3    75.8    -      -       -      +
     72B  ASN*     1.3    61.0    +      -       -      +
     74B  LEU*     3.4     5.6    +      -       -      +
     75B  GLN*     2.9    39.7    +      -       -      +
    112B  GLU*     6.2     0.2    -      -       -      -
    113B  GLY*     4.6     8.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 72 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68B  ILE*     2.8    24.3    +      -       -      +
     69B  ILE      3.5     4.9    -      -       -      +
     71B  GLY*     1.3    72.5    -      -       -      +
     73B  THR*     1.3    58.0    -      -       -      +
     75B  GLN*     3.3     2.4    +      -       -      +
     76B  SER*     2.9    36.0    +      -       -      +
    145B  ASN*     3.8    17.9    +      -       +      +
    151B  TYR*     3.8    19.0    -      -       +      -
    172B  ARG      4.5     0.3    -      -       -      +
    173B  SER*     3.4    11.3    -      -       -      -
    174B  ARG*     2.7    56.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 73 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69B  ILE      2.8    23.2    +      -       -      -
     70B  TYR*     3.7     9.1    -      -       -      -
     72B  ASN*     1.3    76.7    -      -       -      +
     74B  LEU*     1.3    62.7    +      -       -      +
     76B  SER*     3.4     6.8    +      -       -      -
     77B  ILE*     3.3    21.8    +      -       -      +
    115B  MET*     4.1    10.1    -      -       +      -
    123B  ILE*     5.0     4.3    -      -       +      -
    151B  TYR*     3.4    25.0    -      -       +      +
    152B  LEU*     3.6    24.8    -      -       +      +
    155B  LEU*     3.9    25.8    -      -       +      -
    158B  LEU*     3.9     7.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 74 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     70B  TYR      2.9    18.2    +      -       -      +
     71B  GLY*     3.8     5.6    -      -       -      +
     72B  ASN      3.3     0.2    -      -       -      -
     73B  THR*     1.3    77.1    -      -       -      +
     75B  GLN*     1.3    73.0    +      -       -      +
     77B  ILE*     3.2     9.3    -      -       +      +
     78B  LEU*     3.1    47.1    +      -       +      +
    103B  LEU*     4.2    13.5    -      -       +      -
    107B  ALA*     4.3    15.0    -      -       +      +
    110B  ILE*     3.8    29.6    -      -       +      -
    113B  GLY      6.4     0.4    -      -       -      +
    114B  THR      5.2     0.4    -      -       -      +
    115B  MET*     4.2     9.2    -      -       +      +
    119B  MET*     3.8    25.4    -      -       +      -
    123B  ILE*     4.6     1.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 75 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71B  GLY*     2.9    22.8    +      -       -      +
     72B  ASN*     3.8     4.3    -      -       -      +
     74B  LEU*     1.3    88.4    -      -       -      +
     76B  SER*     1.3    63.6    +      -       -      +
     78B  LEU*     3.4    25.6    +      -       -      +
     79B  ALA*     3.0    23.6    +      -       -      +
     82B  ARG*     5.0     6.9    +      -       -      -
    107B  ALA*     6.1     0.2    -      -       -      +
    112B  GLU*     5.2     7.9    +      -       -      -
    145B  ASN*     4.4    14.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 76 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     72B  ASN*     2.9    24.0    +      -       -      +
     73B  THR*     3.6     7.1    -      -       -      -
     75B  GLN*     1.3    77.1    -      -       -      +
     77B  ILE*     1.3    63.5    +      -       -      +
     79B  ALA*     3.1     6.4    +      -       -      +
     80B  ILE*     3.1    25.1    +      -       -      +
    144B  LEU*     3.4    10.1    -      -       -      +
    145B  ASN*     3.5    16.6    +      -       -      +
    148B  ALA*     3.4    35.6    -      -       -      +
    151B  TYR*     5.6     1.2    -      -       -      -
    152B  LEU*     3.9     9.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 77 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  THR      3.3    11.3    +      -       -      +
     74B  LEU*     3.2    16.6    -      -       +      +
     76B  SER*     1.3    77.9    -      -       -      +
     78B  LEU*     1.3    59.9    +      -       -      +
     80B  ILE*     3.2    17.1    +      -       +      +
     81B  VAL*     2.9    37.7    +      -       +      +
    103B  LEU*     3.9    27.8    -      -       +      -
    123B  ILE*     4.0    37.5    -      -       +      +
    126B  LEU*     4.1    26.0    -      -       +      -
    127B  TRP*     4.8     3.1    -      -       +      +
    132B  ILE*     4.7    11.9    -      -       +      -
    152B  LEU*     4.1    13.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 78 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74B  LEU*     3.1    31.8    +      -       +      +
     75B  GLN*     3.6    29.8    -      -       -      +
     76B  SER      3.2     0.2    -      -       -      -
     77B  ILE*     1.3    78.1    -      -       -      +
     79B  ALA*     1.3    61.7    -      -       -      +
     81B  VAL*     3.3     5.2    +      -       -      +
     82B  ARG*     3.1    49.6    +      -       -      +
    103B  LEU*     4.2    22.0    -      -       +      -
    104B  MET*     3.5    30.3    -      -       +      -
    107B  ALA*     3.9    28.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 79 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75B  GLN      3.0    13.8    +      -       -      +
     76B  SER*     3.1     8.7    +      -       -      +
     78B  LEU*     1.3    77.2    -      -       -      +
     80B  ILE*     1.3    63.0    +      -       -      +
     82B  ARG*     3.4    14.7    +      -       -      +
     83B  ALA*     3.0    23.4    +      -       -      +
    142B  TYR*     4.1     7.0    -      -       +      -
    143B  GLN      3.8    22.9    -      -       -      +
    144B  LEU*     3.9    11.4    -      -       +      -
    145B  ASN*     5.4     1.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 80 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  SER      3.1    14.8    +      -       -      +
     77B  ILE*     3.6    10.3    -      -       +      +
     79B  ALA*     1.3    74.6    -      -       -      +
     81B  VAL*     1.3    64.3    +      -       -      +
     83B  ALA*     3.2     4.3    +      -       -      +
     84B  MET*     3.1    20.4    +      -       -      +
    127B  TRP*     4.0    19.1    -      -       +      -
    132B  ILE*     3.8    37.7    -      -       +      +
    135B  CYS*     3.5    11.3    -      -       -      -
    136B  PHE*     3.9    26.5    -      -       +      +
    142B  TYR*     3.8    18.6    -      -       -      +
    144B  LEU*     3.9    12.3    -      -       +      -
    152B  LEU*     4.1    12.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 81 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  ILE*     2.9    28.9    +      -       +      +
     78B  LEU*     3.5     6.5    -      -       -      +
     80B  ILE*     1.3    75.3    -      -       -      +
     82B  ARG*     1.3    64.8    +      -       +      +
     84B  MET*     3.0    27.0    +      -       -      +
     85B  THR*     3.9     4.3    +      -       -      -
     91B  TYR*     3.9    10.3    -      -       -      +
    100B  ALA*     3.9    23.6    -      -       +      -
    103B  LEU*     4.3    18.4    -      -       +      -
    104B  MET*     4.3    20.4    -      -       +      -
    126B  LEU*     4.3    10.1    -      -       +      -
    132B  ILE*     4.5     7.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 82 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75B  GLN*     5.0     6.5    +      -       -      -
     78B  LEU*     3.1    49.0    +      -       -      +
     79B  ALA*     3.8    12.4    -      -       -      +
     81B  VAL*     1.3    75.3    -      -       -      +
     83B  ALA*     1.3    63.6    +      -       -      +
     85B  THR*     3.0    21.1    +      -       -      -
     86B  THR*     3.2    19.1    +      -       +      +
    104B  MET*     3.8    31.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 83 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79B  ALA      3.0    17.5    +      -       -      +
     80B  ILE      3.4     0.9    -      -       -      +
     82B  ARG*     1.3    74.2    -      -       -      +
     84B  MET*     1.3    58.2    +      -       -      +
     86B  THR*     3.2    12.1    -      -       -      +
     87B  LEU*     2.7    39.3    +      -       +      +
    135B  CYS*     3.4    21.8    -      -       -      -
    142B  TYR*     3.7    30.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 84 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  ILE      3.1    10.5    +      -       -      +
     81B  VAL*     3.0    16.4    +      -       -      +
     83B  ALA*     1.3    74.7    -      -       -      +
     85B  THR*     1.3    58.2    -      -       -      +
     88B  ASN*     3.0     6.4    +      -       -      -
     89B  ILE*     2.6    59.2    +      -       +      +
     90B  GLN      3.5    24.7    -      -       -      +
     91B  TYR*     3.7    31.0    -      -       +      +
    131B  GLY      3.6    17.3    -      -       -      +
    132B  ILE*     3.8    17.7    -      -       +      +
    135B  CYS*     3.4    26.4    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 85 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     81B  VAL      4.3     4.9    +      -       -      -
     82B  ARG*     3.0    11.0    +      -       -      -
     84B  MET*     1.3    76.3    -      -       -      +
     86B  THR*     1.3    69.2    +      -       +      +
     88B  ASN*     3.0    15.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 86 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82B  ARG*     3.2    13.2    +      -       +      +
     83B  ALA*     3.2    18.2    +      -       -      -
     85B  THR*     1.3    79.7    -      -       +      +
     87B  LEU*     1.3    72.7    +      -       -      +
     88B  ASN*     3.5     1.7    +      -       -      +
    142B  TYR*     5.6     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