Contacts of the helix formed by residues 392 - 417 (chain C) in PDB entry 5UQ9


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 ASP 392 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379C  ALA*     3.5    39.2    -      -       -      +
    382C  ARG*     5.1     6.2    +      -       -      +
    386C  LEU*     4.1    16.2    -      -       +      +
    388C  ASN      4.1     0.8    +      -       -      -
    389C  LEU      3.2     5.3    +      -       -      +
    391C  LEU*     1.3    80.2    -      -       -      +
    393C  ASP*     1.3    78.3    +      -       -      +
    394C  PHE*     3.3    22.1    +      -       -      +
    395C  PHE*     3.6    23.0    -      -       +      -
    396C  LYS*     3.0    26.8    +      -       -      +
    303D  LYS*     5.0     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 393 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382C  ARG*     2.8    39.1    +      -       -      +
    391C  LEU      4.1     1.0    +      -       -      -
    392C  ASP*     1.3    87.1    -      -       -      +
    394C  PHE*     1.3    69.9    +      -       -      +
    396C  LYS*     4.0     4.6    -      -       -      +
    397C  SER*     3.0    30.5    +      -       -      -
    303D  LYS*     5.3     3.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 394 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227C  GLU*     5.1     8.1    -      -       +      -
    328C  TYR*     3.2    27.8    -      +       -      -
    372C  PHE*     5.2     1.3    -      +       -      -
    375C  LYS*     3.5    42.2    -      -       +      -
    378C  ASP*     6.1     0.7    -      -       -      +
    392C  ASP*     3.3    11.7    +      -       -      +
    393C  ASP*     1.3    87.6    -      -       -      +
    395C  PHE*     1.3    75.3    +      +       -      +
    397C  SER*     3.3     5.7    +      -       -      -
    398C  ALA*     2.8    32.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 395 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332C  ILE*     3.8    30.5    -      -       +      -
    372C  PHE*     3.4    34.3    -      +       -      -
    375C  LYS      3.5    17.5    -      -       -      -
    376C  ILE*     3.4    21.1    -      -       +      -
    379C  ALA*     3.6    26.0    -      -       +      -
    389C  LEU*     3.3    33.0    -      -       +      +
    390C  LEU*     4.7     3.1    -      -       -      +
    392C  ASP*     3.5    21.0    +      -       +      -
    394C  PHE*     1.3    87.6    -      +       -      +
    396C  LYS*     1.3    63.5    +      -       -      +
    398C  ALA*     4.1     4.3    -      -       +      -
    399C  VAL*     3.0    29.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 396 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    390C  LEU*     4.0    12.8    +      -       -      +
    392C  ASP      3.0    19.5    +      -       -      +
    393C  ASP*     4.0     3.8    -      -       -      +
    395C  PHE*     1.3    79.1    -      -       -      +
    397C  SER*     1.3    69.4    +      -       -      +
    399C  VAL*     4.0     2.5    -      -       +      +
    400C  GLU*     3.0    40.9    +      -       -      +
    430C  TYR*     5.2     1.8    -      -       -      +
    303D  LYS*     3.1    47.8    -      -       -      +
    304D  LEU*     3.8    24.0    -      -       +      +
    305D  LYS*     3.5    26.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 397 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    393C  ASP      3.0    18.3    +      -       -      -
    394C  PHE*     3.8     5.6    -      -       -      -
    396C  LYS*     1.3    86.4    +      -       -      +
    398C  ALA*     1.3    57.1    +      -       -      +
    400C  GLU*     3.8     2.8    -      -       -      +
    401C  ASN*     2.9    30.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 398 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328C  TYR*     3.7    31.0    -      -       +      +
    332C  ILE*     3.8    12.8    -      -       +      -
    394C  PHE*     2.8    27.1    +      -       +      +
    395C  PHE*     3.8     2.7    -      -       -      +
    396C  LYS      3.2     0.2    -      -       -      -
    397C  SER*     1.3    76.8    -      -       -      +
    399C  VAL*     1.3    62.2    +      -       -      +
    401C  ASN*     3.2     6.6    +      -       -      +
    402C  CYS*     3.1    30.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 399 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329C  ALA*     4.9     9.6    -      -       +      +
    332C  ILE*     4.1    22.7    -      -       +      -
    333C  ILE*     5.2     2.5    -      -       +      -
    390C  LEU*     4.0    18.6    -      -       +      -
    395C  PHE      3.0    19.1    +      -       -      +
    396C  LYS*     4.1     3.1    -      -       -      +
    398C  ALA*     1.3    74.9    -      -       -      +
    400C  GLU*     1.3    57.8    +      -       -      +
    402C  CYS*     3.1     5.8    +      -       -      +
    403C  GLN*     2.9    29.5    +      -       +      +
    406C  TRP*     4.3    15.9    -      -       +      -
    430C  TYR*     3.5    42.4    -      -       +      +
    304D  LEU*     5.9     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 400 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    396C  LYS*     3.0    35.6    +      -       -      +
    397C  SER*     3.8     4.9    -      -       -      +
    399C  VAL*     1.3    77.8    -      -       -      +
    401C  ASN*     1.3    61.3    +      -       -      +
    402C  CYS      3.4     0.5    +      -       -      -
    403C  GLN*     3.7    23.3    +      -       -      +
    404C  ASP      4.9     1.4    +      -       -      -
    430C  TYR*     4.8     2.2    +      -       -      +
    305D  LYS*     3.4    45.0    +      -       -      +
    308D  GLN*     3.2    24.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 401 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325C  LYS*     3.4    30.7    +      -       -      +
    397C  SER      2.9    18.7    +      -       -      +
    398C  ALA*     3.6     8.3    -      -       -      +
    399C  VAL      3.2     0.4    -      -       -      -
    400C  GLU*     1.3    76.7    -      -       -      +
    402C  CYS*     1.3    60.7    +      -       -      +
    403C  GLN      3.6     0.2    -      -       -      -
    404C  ASP*     5.3     1.2    +      -       -      +
    405C  SER*     5.5     1.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 402 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    324C  ARG*     6.0     1.1    -      -       -      -
    325C  LYS*     3.5    45.8    -      -       +      +
    328C  TYR*     3.8    24.5    -      -       -      -
    329C  ALA*     3.9    12.3    -      -       +      -
    398C  ALA*     3.1    23.3    +      -       -      +
    399C  VAL      3.1     5.3    +      -       -      +
    401C  ASN*     1.3    85.1    -      -       -      +
    403C  GLN*     1.3    51.5    +      -       -      +
    404C  ASP      3.4     2.5    -      -       -      -
    405C  SER*     3.4     3.9    +      -       -      -
    406C  TRP*     2.7    34.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 403 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    399C  VAL*     2.9    15.0    +      -       +      +
    400C  GLU*     3.7    20.5    +      -       -      +
    401C  ASN      3.6     2.2    -      -       -      -
    402C  CYS*     1.3    77.5    -      -       -      +
    404C  ASP*     1.3    63.8    +      -       -      +
    406C  TRP*     3.1    14.8    +      -       +      +
    407C  ARG*     2.7    71.7    +      -       +      +
    430C  TYR*     4.4    11.3    +      -       +      -
    305D  LYS      3.3    16.5    +      -       -      -
    306D  GLY*     3.0    34.5    +      -       -      -
    307D  PRO*     3.1     3.0    -      -       -      +
    308D  GLN*     5.0     0.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 404 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    400C  GLU      4.9     1.6    +      -       -      -
    401C  ASN      5.3     0.8    +      -       -      +
    402C  CYS      3.4     0.6    -      -       -      -
    403C  GLN*     1.3    78.0    -      -       -      +
    405C  SER*     1.3    63.5    +      -       -      +
    407C  ARG*     3.6     6.9    +      -       -      +
    408C  ARG*     3.1    45.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 405 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322C  ASP*     2.8    49.0    +      -       -      +
    325C  LYS*     3.7    29.7    +      -       -      +
    401C  ASN      5.6     0.6    +      -       -      -
    402C  CYS      3.4     2.9    +      -       -      -
    403C  GLN      3.3     0.2    -      -       -      -
    404C  ASP*     1.3    76.4    -      -       -      +
    406C  TRP*     1.3    65.1    +      -       -      +
    408C  ARG*     3.3    14.9    +      -       -      +
    409C  ALA      3.1    18.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 406 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325C  LYS*     4.7     0.4    -      -       -      +
    326C  ALA*     3.5    30.8    +      -       +      +
    329C  ALA*     3.6    23.1    -      -       +      -
    330C  SER*     3.3    27.5    +      -       -      -
    333C  ILE*     3.7    16.2    -      -       +      -
    399C  VAL*     4.3    11.7    -      -       +      -
    402C  CYS      2.7    22.9    +      -       -      +
    403C  GLN*     3.1    17.4    +      -       +      +
    405C  SER*     1.3    75.5    -      -       -      +
    407C  ARG*     1.3    63.2    +      -       +      +
    409C  ALA*     3.3     2.3    +      -       -      +
    410C  VAL*     3.1    28.4    +      -       +      +
    423C  PHE*     3.8    11.9    +      -       -      +
    426C  ALA*     3.4    21.8    -      -       +      -
    427C  LEU*     3.3    43.3    -      -       +      -
    430C  TYR*     4.2    16.4    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 407 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    403C  GLN*     2.7    49.2    +      -       -      +
    404C  ASP*     4.2     6.5    -      -       -      +
    406C  TRP*     1.3    75.6    -      -       -      +
    408C  ARG*     1.3    57.2    +      -       -      +
    411C  SER*     2.8    35.8    +      -       -      -
    427C  LEU*     3.7    25.4    -      -       +      +
    430C  TYR*     4.4     1.6    -      -       -      -
    431C  ASP*     2.4    44.0    +      -       -      -
    434C  ARG*     4.0     1.4    -      -       -      +
    307D  PRO*     3.7    20.6    -      -       -      +
    414D  VAL*     2.5    51.0    +      -       +      +
    415D  GLN*     4.3    13.0    -      -       +      +
    417D  GLY*     3.4     9.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 408 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319C  PHE*     3.9     6.2    -      -       +      -
    322C  ASP*     2.5    48.3    +      -       -      +
    404C  ASP*     3.1    46.1    +      -       -      +
    405C  SER*     3.3    19.7    +      -       -      +
    406C  TRP      3.3     0.2    -      -       -      -
    407C  ARG*     1.3    76.7    -      -       -      +
    409C  ALA*     1.3    60.0    +      -       -      +
    411C  SER*     4.1     4.4    -      -       -      -
    412C  THR*     2.8    36.4    +      -       -      +
    415D  GLN*     5.9     4.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 409 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204C  LEU*     4.4     9.3    -      -       +      +
    319C  PHE*     3.9    14.9    -      -       +      -
    322C  ASP*     3.8    22.8    -      -       +      +
    323C  ILE*     4.3     9.6    -      -       +      +
    326C  ALA*     4.2    10.5    -      -       +      -
    405C  SER      3.1    17.7    +      -       -      +
    406C  TRP      3.7     3.8    -      -       -      +
    408C  ARG*     1.3    75.1    -      -       -      +
    410C  VAL*     1.3    64.0    +      -       +      +
    412C  THR*     4.0     1.2    -      -       -      -
    413C  GLY*     3.1    19.1    +      -       -      -
    420C  MET*     3.8     8.9    -      -       +      +
    423C  PHE*     6.0     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 410 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326C  ALA*     5.6     0.2    -      -       +      -
    406C  TRP*     3.1    35.9    +      -       +      +
    407C  ARG      3.4     3.6    +      -       -      +
    409C  ALA*     1.3    74.6    -      -       +      +
    411C  SER*     1.3    65.9    +      -       -      +
    413C  GLY*     3.4     1.6    +      -       -      -
    414C  VAL*     3.0    32.3    +      -       +      +
    420C  MET*     3.6    18.4    -      -       +      +
    423C  PHE*     4.4    10.5    -      -       +      +
    424C  THR*     4.0    24.0    -      -       +      -
    427C  LEU*     4.0    11.4    -      -       +      -
    414D  VAL*     3.7    30.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 411 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    407C  ARG      2.8    24.1    +      -       -      -
    408C  ARG*     4.1     5.6    -      -       -      -
    410C  VAL*     1.3    76.1    -      -       -      +
    412C  THR*     1.3    62.2    +      -       -      +
    414C  VAL*     3.4     4.7    +      -       -      +
    415C  GLN*     3.2    27.5    +      -       -      +
    411D  SER*     3.2    28.9    +      -       -      +
    414D  VAL*     3.5    14.4    -      -       -      +
    415D  GLN*     3.5    20.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 412 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208C  VAL*     4.1    11.4    -      -       +      -
    310C  PHE*     3.9    21.3    -      -       +      -
    312C  PHE*     4.5    11.1    -      -       +      -
    319C  PHE*     3.4    32.1    -      -       +      -
    408C  ARG*     2.8    28.1    +      -       -      +
    409C  ALA      4.0     0.2    -      -       -      -
    411C  SER*     1.3    77.2    -      -       -      +
    413C  GLY*     1.3    57.1    +      -       -      +
    415C  GLN*     3.3     7.2    +      -       -      +
    416C  ALA*     2.9    26.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 413 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204C  LEU*     4.1    16.8    -      -       -      +
    208C  VAL*     4.9     0.2    -      -       -      -
    319C  PHE*     5.1     0.2    -      -       -      -
    409C  ALA      3.1    12.2    +      -       -      -
    412C  THR*     1.3    77.3    -      -       -      +
    414C  VAL*     1.3    60.5    +      -       -      +
    416C  ALA*     3.4     4.8    +      -       -      -
    417C  GLY      3.1     3.3    +      -       -      -
    418C  ILE      3.0    29.2    +      -       -      +
    420C  MET*     3.6    26.0    -      -       -      -
    431D  ASP*     5.0     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 414 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    410C  VAL*     3.0    31.6    +      -       +      +
    411C  SER*     3.7     8.3    -      -       -      +
    412C  THR      3.2     0.2    -      -       -      -
    413C  GLY*     1.3    77.5    -      -       -      +
    415C  GLN*     1.3    60.6    +      -       +      +
    417C  GLY      3.3     1.2    +      -       -      -
    418C  ILE      5.3     1.3    -      -       -      +
    420C  MET*     5.5     1.8    -      -       -      -
    424C  THR*     5.0     8.5    -      -       +      -
    407D  ARG*     2.9    57.7    +      -       +      +
    410D  VAL*     3.8    23.1    -      -       +      -
    411D  SER*     4.5     4.5    -      -       -      +
    414D  VAL*     5.5     0.2    -      -       +      -
    427D  LEU*     3.6    26.5    -      -       +      -
    431D  ASP*     5.4     1.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 415 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307C  PRO*     3.4    21.5    -      -       -      +
    309C  LYS      5.8     0.2    -      -       -      +
    310C  PHE*     3.6    32.5    -      -       +      +
    411C  SER      3.2    16.7    +      -       -      +
    412C  THR*     3.8     1.3    -      -       -      +
    414C  VAL*     1.3    77.0    -      -       +      +
    416C  ALA*     1.3    59.7    +      -       -      +
    404D  ASP*     5.0     3.3    +      -       -      +
    407D  ARG*     3.8    37.5    +      -       -      +
    408D  ARG*     4.0    11.1    -      -       -      +
    411D  SER*     4.4    10.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 416 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    207C  ASP      5.6     1.1    -      -       -      +
    208C  VAL*     3.7    25.4    -      -       +      -
    307C  PRO*     3.4    11.3    -      -       -      +
    310C  PHE*     3.5    30.3    -      -       +      +
    412C  THR      2.9    16.9    +      -       -      +
    413C  GLY      3.9     1.1    -      -       -      +
    414C  VAL      3.2     0.4    -      -       -      -
    415C  GLN*     1.3    76.7    -      -       -      +
    417C  GLY*     1.3    62.9    +      -       -      +
    418C  ILE*     3.8    13.1    -      -       +      +
    434D  ARG*     4.7     0.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 417 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307C  PRO*     3.8     4.3    -      -       -      -
    413C  GLY      3.1     4.2    +      -       -      -
    414C  VAL      3.3     1.6    +      -       -      -
    415C  GLN      3.3     3.8    +      -       -      -
    416C  ALA*     1.3    79.6    -      -       -      +
    418C  ILE*     1.3    61.7    +      -       -      +
    407D  ARG*     3.5    11.2    -      -       -      -
    431D  ASP*     3.4    21.9    -      -       -      +
    434D  ARG*     2.9    28.3    +      -       -      -
    435D  HIS*     3.2    12.3    +      -       -      -
----------------------------------------------------------
 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