Contacts of the helix formed by residues 430 - 454 (chain B) in PDB entry 6NRB


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 GLY 430 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    428B  THR      2.6    13.5    +      -       -      -
    429B  PRO*     1.3    77.6    -      -       -      +
    431B  LYS*     1.3    67.9    +      -       -      -
    432B  GLU*     2.9     9.8    +      -       -      +
    433B  ALA*     3.2     6.1    +      -       -      +
    434B  VAL*     3.5    11.3    +      -       -      +
    459J  ALA*     4.7     0.7    -      -       -      +
    460J  ASP*     2.9    17.0    -      -       -      -
    463J  ALA*     4.7     0.3    -      -       -      +
    464J  GLN*     3.5    15.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 431 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125B  THR*     3.2    40.3    -      -       +      +
    128B  ALA*     5.4     4.0    -      -       +      -
    430B  GLY*     1.3    72.0    -      -       -      -
    432B  GLU*     1.3    63.2    +      -       -      +
    434B  VAL*     3.2    26.9    -      -       -      +
    435B  ALA      3.7     1.2    +      -       -      -
    467E  GLY*     3.8    27.3    +      -       -      -
    468E  MET*     5.0    14.1    -      -       -      +
    495E  HIS*     4.9    11.4    -      -       -      +
    457J  ASP*     5.2    11.5    +      -       -      +
    459J  ALA*     5.2     0.7    -      -       +      -
    460J  ASP*     2.8    24.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 432 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128B  ALA*     4.7     4.0    -      -       +      +
    129B  GLY*     3.1    32.0    -      -       -      +
    132B  GLU*     4.9     9.8    -      -       +      +
    428B  THR*     3.1    49.0    -      -       +      +
    430B  GLY*     3.8     8.4    +      -       -      +
    431B  LYS*     1.3    80.3    -      -       -      +
    433B  ALA*     1.3    52.4    +      -       -      +
    435B  ALA      3.0     5.2    +      -       -      -
    436B  MET*     2.5    36.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 433 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    425B  ALA*     3.2    31.0    -      -       +      +
    428B  THR*     3.4     3.8    -      -       -      +
    429B  PRO*     3.3    25.4    -      -       +      -
    430B  GLY      3.2     1.8    +      -       -      +
    432B  GLU*     1.3    78.9    -      -       -      +
    434B  VAL*     1.3    62.1    +      -       -      +
    436B  MET*     2.6    14.5    +      -       -      +
    437B  GLU*     2.3    39.6    +      -       +      +
    463J  ALA*     4.9     4.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 434 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     3.5    16.4    -      -       +      +
    119B  LYS*     4.0     7.2    -      -       -      +
    121B  ILE*     3.5    41.5    -      -       +      -
    125B  THR*     4.6     3.6    -      -       +      -
    430B  GLY      3.5     8.7    -      -       -      +
    431B  LYS*     3.2    19.3    -      -       -      +
    432B  GLU      3.2     0.2    -      -       -      -
    433B  ALA*     1.3    76.2    -      -       -      +
    435B  ALA*     1.3    52.6    +      -       -      +
    437B  GLU*     4.0    14.1    -      -       -      +
    438B  SER*     2.7    28.8    +      -       -      -
    459J  ALA*     3.5    31.2    -      -       +      -
    463J  ALA*     5.5     3.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 435 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     4.7     2.2    -      -       -      -
    125B  THR      3.7     6.9    +      -       -      +
    126B  ILE*     3.1    31.1    -      -       -      +
    129B  GLY*     3.7     6.3    -      -       -      +
    130B  TRP*     2.3    46.1    +      -       +      +
    431B  LYS      3.7     1.4    +      -       -      -
    432B  GLU      3.0     8.3    +      -       -      +
    433B  ALA      3.1     2.2    -      -       -      -
    434B  VAL*     1.3    77.3    -      -       -      +
    436B  MET*     1.3    52.9    +      -       -      +
    437B  GLU      3.4     0.2    -      -       -      -
    438B  SER*     3.0     3.4    +      -       -      -
    439B  TYR      2.5    20.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 436 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129B  GLY*     4.1     5.4    -      -       -      +
    132B  GLU*     4.0    13.0    -      -       +      -
    133B  ALA*     3.6    33.7    -      -       +      +
    421B  VAL*     3.4    19.5    -      -       +      +
    424B  LEU*     3.6    19.3    -      -       +      -
    425B  ALA*     3.4    31.2    -      -       +      +
    428B  THR*     3.5    27.8    -      -       +      -
    432B  GLU*     2.5    25.3    +      -       +      +
    433B  ALA*     2.6    11.0    +      -       -      -
    435B  ALA*     1.3    69.3    -      -       -      +
    437B  GLU*     1.3    62.1    +      -       -      +
    439B  TYR*     3.2     6.5    -      -       -      +
    440B  ALA*     3.1    20.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 437 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116B  LEU*     5.9     0.9    -      -       -      +
    119B  LYS*     5.7     3.6    +      -       -      -
    422B  THR*     4.8     8.8    +      -       +      +
    425B  ALA*     3.4    16.1    -      -       +      +
    426B  ASN*     6.0     1.1    -      -       -      +
    433B  ALA*     2.3    43.4    +      -       +      +
    434B  VAL*     4.0    17.8    -      -       -      +
    436B  MET*     1.3    65.2    -      -       -      +
    438B  SER*     1.3    67.7    +      -       -      +
    439B  TYR      3.2     0.9    +      -       -      -
    440B  ALA*     3.7     0.3    +      -       -      -
    441B  LYS*     3.0    42.8    +      -       +      +
    444J  ARG*     4.2    23.0    +      -       -      -
    463J  ALA*     5.6     5.7    -      -       -      +
    466J  ARG*     5.1     5.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 438 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109B  LEU*     3.4     5.5    -      -       -      +
    112B  GLU*     3.0    55.9    +      -       -      +
    116B  LEU*     3.6    13.9    -      -       -      +
    130B  TRP*     3.7    10.1    -      -       -      -
    434B  VAL      2.7    20.3    +      -       -      -
    435B  ALA*     3.0    11.1    +      -       -      -
    437B  GLU*     1.3    82.8    -      -       -      +
    439B  TYR*     1.3    63.1    +      -       -      +
    441B  LYS*     3.6     2.5    +      -       -      +
    442B  ALA      3.8     5.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 439 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  LEU*     5.5     4.0    -      -       +      -
    109B  LEU*     3.7    21.6    -      -       +      +
    130B  TRP*     3.3    24.7    -      +       +      +
    133B  ALA*     3.0    23.8    -      -       +      -
    134B  THR*     3.1    36.2    +      -       -      +
    137B  ALA*     3.2    28.9    -      -       +      +
    421B  VAL*     3.4    19.7    -      -       +      -
    435B  ALA      2.5    15.2    +      -       -      +
    436B  MET*     3.2    13.5    -      -       -      +
    437B  GLU      3.0     0.8    -      -       -      -
    438B  SER*     1.3    72.3    -      -       -      +
    440B  ALA*     1.3    60.8    +      -       -      +
    442B  ALA*     2.9    28.2    +      -       -      +
    443B  LEU*     3.4    16.8    +      -       +      +
    504B  LEU*     4.4    11.8    +      -       -      +
    508B  ALA*     4.5     4.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 440 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    418B  ALA*     3.2    23.4    -      -       -      +
    421B  VAL*     3.4    16.2    -      -       +      -
    422B  THR*     3.0    37.0    +      -       -      +
    436B  MET      3.1     4.5    +      -       -      +
    439B  TYR*     1.3    76.1    -      -       -      +
    441B  LYS*     1.3    61.4    +      -       -      +
    442B  ALA      3.2     0.2    -      -       -      -
    443B  LEU*     3.1    14.9    +      -       +      +
    444B  ARG*     2.7    22.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 441 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112B  GLU*     3.0    38.3    +      -       -      +
    422B  THR*     4.3     6.3    +      -       +      +
    437B  GLU*     3.0    36.7    +      -       +      +
    438B  SER*     3.6     7.4    +      -       -      +
    439B  TYR      3.1     1.0    -      -       -      -
    440B  ALA*     1.3    74.9    -      -       -      +
    442B  ALA*     1.3    53.2    +      -       -      +
    444B  ARG*     2.9    16.3    +      -       +      +
    445B  MET*     2.3    46.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 442 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  LEU*     4.5     9.9    -      -       +      +
    108B  GLU*     3.5    24.0    -      -       +      -
    109B  LEU*     3.7    20.6    -      -       +      -
    438B  SER      3.8     1.2    +      -       -      -
    439B  TYR      2.9    12.1    +      -       -      +
    441B  LYS*     1.3    77.5    -      -       -      +
    443B  LEU*     1.3    56.3    +      -       +      +
    445B  MET*     2.9    17.8    +      -       +      +
    446B  LEU*     2.8    38.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 443 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  LEU*     4.5     9.9    -      -       +      -
    137B  ALA*     3.5    20.4    -      -       +      -
    414B  GLU*     3.2    46.0    -      -       -      +
    417B  MET*     3.4    49.1    -      -       +      +
    418B  ALA*     3.6     3.4    -      -       +      -
    421B  VAL*     3.8     0.9    -      -       +      -
    439B  TYR*     3.4    16.1    +      -       +      +
    440B  ALA*     3.1    26.1    +      -       -      +
    442B  ALA*     1.3    76.7    -      -       -      +
    444B  ARG*     1.3    54.7    +      -       -      +
    446B  LEU*     5.6     0.2    -      -       -      -
    447B  PRO*     3.0    18.4    -      -       -      +
    504B  LEU*     4.2    11.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 444 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    415B  MET*     3.3    27.0    -      -       +      -
    418B  ALA*     3.4     9.3    +      -       +      +
    419B  HIS*     4.1    30.9    +      -       -      +
    422B  THR*     4.8    15.8    +      -       -      +
    440B  ALA      2.7    12.6    +      -       -      +
    441B  LYS*     2.9    18.1    +      -       -      +
    443B  LEU*     1.3    77.5    -      -       -      +
    445B  MET*     1.3    61.6    +      -       +      +
    447B  PRO*     3.3    12.1    -      -       -      +
    448B  THR*     3.7    12.0    -      -       -      +
    462B  VAL*     3.6    10.7    -      -       +      +
    466B  ARG*     3.0    45.3    -      -       -      +
    426J  ASN*     3.9     6.9    +      -       -      +
    437J  GLU*     2.8    30.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 445 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108B  GLU*     3.1    49.8    -      -       -      +
    111B  ARG*     5.1     9.6    -      -       +      -
    112B  GLU*     3.2    27.1    -      -       -      +
    441B  LYS*     2.3    32.8    +      -       +      +
    442B  ALA*     2.9    23.9    +      -       +      +
    444B  ARG*     1.3    70.8    -      -       +      +
    446B  LEU*     1.3    62.1    +      -       -      +
    447B  PRO      3.4     0.2    -      -       -      -
    448B  THR*     2.0    39.6    +      -       +      +
    449B  ILE*     3.3     6.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 446 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  LEU*     4.4     8.0    -      -       +      +
    101B  SER*     5.0     5.2    -      -       -      +
    104B  VAL*     3.6    32.5    -      -       +      -
    105B  LEU*     3.5    39.7    -      -       +      +
    108B  GLU*     3.6    21.3    -      -       +      -
    414B  GLU*     4.2    18.2    -      -       +      +
    442B  ALA      2.8    18.0    +      -       -      +
    445B  MET*     1.3    69.8    -      -       -      +
    447B  PRO*     1.3    62.8    -      -       +      +
    449B  ILE*     2.7    35.6    +      -       +      +
    450B  ILE*     3.4    10.2    +      -       -      +
    503B  VAL*     6.5     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 447 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    411B  GLY*     3.5    29.6    -      -       -      +
    414B  GLU*     3.6     7.2    -      -       +      -
    415B  MET*     4.3     3.1    -      -       +      -
    443B  LEU      3.0    28.0    -      -       -      +
    444B  ARG*     3.3     9.4    -      -       -      +
    446B  LEU*     1.3    89.3    -      -       +      +
    448B  THR*     1.3    60.5    +      -       -      +
    450B  ILE*     3.7     9.0    -      -       +      +
    451B  ALA*     3.5    14.9    +      -       -      +
    462B  VAL*     3.6    18.6    -      -       +      -
    465B  LEU*     3.9     6.5    -      -       +      -
    478B  LEU*     3.4    25.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 448 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    444B  ARG      3.7     8.3    -      -       -      +
    445B  MET*     2.0    37.7    +      -       +      +
    447B  PRO*     1.3    78.2    -      -       -      +
    449B  ILE*     1.3    66.2    +      -       -      +
    451B  ALA*     3.5     0.3    +      -       -      -
    452B  ASP*     2.8    42.7    +      -       -      -
    458B  SER*     3.4    23.3    -      -       -      +
    462B  VAL*     3.5    22.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 449 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  LYS*     3.5    50.3    -      -       +      +
     43B  LEU*     3.6    13.5    -      -       +      -
    108B  GLU*     3.8    15.5    -      -       -      +
    445B  MET*     3.3    12.8    -      -       +      +
    446B  LEU*     2.7    33.3    +      -       +      +
    448B  THR*     1.3    82.7    -      -       -      +
    450B  ILE*     1.3    50.2    +      -       -      +
    452B  ASP*     3.6     4.1    -      -       -      +
    453B  ASN*     2.4    58.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 450 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     43B  LEU*     3.6    36.8    -      -       +      +
     44B  GLY      4.5     0.4    -      -       -      +
     46B  LYS*     5.4     0.2    -      -       -      +
    410B  GLY*     4.2     7.4    -      -       -      +
    411B  GLY      5.2     0.7    -      -       -      +
    446B  LEU      3.4     7.4    +      -       -      +
    447B  PRO*     3.7    13.0    -      -       +      +
    449B  ILE*     1.3    75.9    -      -       -      +
    451B  ALA*     1.3    66.9    +      -       +      +
    453B  ASN*     3.3     9.5    -      -       -      +
    454B  ALA*     2.5    34.2    +      -       -      +
    478B  LEU*     3.8    34.5    -      -       +      +
    480B  MET*     3.7    50.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 451 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    447B  PRO      3.5    15.7    +      -       -      +
    448B  THR      3.5     2.1    +      -       -      +
    449B  ILE      3.3     0.6    -      -       -      -
    450B  ILE*     1.3    88.5    -      -       +      +
    452B  ASP*     1.3    58.2    +      -       -      +
    454B  ALA*     3.1    10.9    +      -       -      +
    455B  GLY      2.8     8.0    +      -       -      -
    456B  TYR*     2.8    35.7    +      -       -      +
    458B  SER*     4.5     7.4    -      -       -      -
    461B  LEU*     4.5    14.1    -      -       +      -
    478B  LEU*     4.2    13.7    -      -       +      -
    480B  MET*     5.7     0.2    -      -       -      +
    483B  GLY      4.9     2.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 452 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    448B  THR*     2.8    31.1    +      -       -      +
    449B  ILE*     3.9     4.4    -      -       -      +
    451B  ALA*     1.3    72.8    -      -       -      +
    453B  ASN*     1.3    62.4    +      -       -      +
    455B  GLY*     3.0    17.6    +      -       -      +
    456B  TYR      2.9    20.8    -      -       -      +
    457B  ASP*     4.3     0.7    -      -       -      -
    458B  SER*     3.4    23.9    +      -       -      -
     27D  ARG*     4.0     9.6    +      -       -      +
    129D  HIS*     3.8     7.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 453 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40B  LYS      2.9    27.5    +      -       -      +
     41B  SER*     3.1    12.1    -      -       -      +
     43B  LEU      3.1    22.5    +      -       -      +
     44B  GLY*     5.5     0.2    -      -       -      -
     46B  LYS*     2.8    25.6    -      -       -      +
     47B  GLY*     3.2     2.3    -      -       -      +
    449B  ILE*     2.4    50.9    +      -       -      +
    450B  ILE      3.3     5.6    -      -       -      +
    452B  ASP*     1.3    68.1    -      -       -      +
    454B  ALA*     1.3    60.6    +      -       -      +
    455B  GLY      2.9     6.1    +      -       -      -
     27D  ARG*     2.6    26.5    +      -       -      +
    129D  HIS*     3.1    16.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 454 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     46B  LYS*     3.3    28.5    +      -       -      +
    450B  ILE      2.5    18.2    +      -       -      +
    451B  ALA*     3.1    15.0    +      -       -      +
    453B  ASN*     1.3    72.5    -      -       -      +
    455B  GLY*     1.3    60.9    +      -       -      +
    456B  TYR*     3.2    16.1    -      -       +      -
    480B  MET*     4.1    12.1    -      -       +      +
    483B  GLY*     3.9     9.9    -      -       -      -
    129D  HIS*     4.4     0.7    -      -       -      -
    132D  ILE*     3.2    23.1    -      -       -      +
----------------------------------------------------------
 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