Contacts of the helix formed by residues 298 - 322 (chain A) in PDB entry 1DKF


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 PRO 298 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    296A  GLU      3.8     0.6    -      -       -      +
    297A  LEU*     1.3    98.3    -      -       +      +
    299A  LEU*     1.3    65.6    +      -       -      +
    300A  ASP*     4.7     3.4    -      -       +      +
    301A  ASP*     3.1    36.0    +      -       +      +
    302A  GLN*     3.1    20.4    +      -       -      +
    389A  SER*     3.7    15.7    -      -       -      +
    390A  ASN*     5.6     0.4    -      -       +      -
    393A  GLU*     4.0     9.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 299 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297A  LEU      3.4     2.4    +      -       -      -
    298A  PRO*     1.3    66.4    -      -       -      +
    300A  ASP*     1.3    79.1    +      -       -      +
    301A  ASP      2.7     6.6    +      -       -      -
    302A  GLN*     2.6    38.7    +      -       -      +
    303A  VAL*     3.1    14.7    +      -       +      +
    457A  MET*     5.6     1.6    -      -       +      -
    460A  LEU*     4.2    30.7    -      -       +      +
    461A  GLU*     4.0    35.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 300 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298A  PRO*     3.5     3.7    -      -       +      +
    299A  LEU*     1.3    91.2    -      -       -      +
    301A  ASP*     1.3    62.5    +      -       -      +
    303A  VAL*     3.9     8.9    +      -       -      +
    304A  ILE*     3.2    28.5    +      -       +      +
    389A  SER*     6.2     1.6    -      -       -      -
    457A  MET*     4.5    15.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 301 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    297A  LEU*     4.9     5.5    -      -       +      +
    298A  PRO*     3.1    37.9    +      -       +      +
    299A  LEU      2.7     4.9    +      -       -      -
    300A  ASP*     1.3    76.4    -      -       -      +
    302A  GLN*     1.3    59.2    +      -       -      +
    303A  VAL      3.1     2.0    -      -       -      -
    304A  ILE*     2.8    19.6    +      -       -      +
    305A  LEU*     2.9    21.9    +      -       +      +
    387A  GLY      4.2     2.3    -      -       -      +
    388A  LEU*     3.6    20.3    -      -       +      +
    389A  SER*     2.7    30.4    +      -       -      -
    390A  ASN*     3.4    21.8    +      -       -      +
    394A  VAL*     4.7     4.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 302 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289A  LYS*     5.6     1.8    -      -       -      +
    294A  PHE*     3.1    53.8    -      -       +      +
    295A  SER*     3.1    20.2    +      -       -      +
    297A  LEU*     3.1    22.7    -      -       +      +
    298A  PRO      3.1    15.1    +      -       -      +
    299A  LEU*     2.6    22.7    +      -       -      +
    301A  ASP*     1.3    71.1    -      -       -      +
    303A  VAL*     1.3    59.3    +      -       -      +
    305A  LEU*     3.5     2.5    +      -       -      +
    306A  LEU*     3.3    28.9    +      -       -      +
    460A  LEU*     3.6    25.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 303 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299A  LEU*     3.1    12.8    +      -       +      +
    300A  ASP*     4.0    11.7    -      -       -      +
    301A  ASP      3.1     0.8    -      -       -      -
    302A  GLN*     1.3    80.0    -      -       -      +
    304A  ILE*     1.3    64.3    +      -       +      +
    306A  LEU*     3.6     3.9    +      -       -      +
    307A  ARG*     3.1    35.6    +      -       -      +
    453A  ASP*     4.4    20.6    -      -       +      +
    456A  LEU*     4.2     6.6    -      -       +      +
    457A  MET*     3.8    39.7    -      -       +      +
    460A  LEU*     3.5    23.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 304 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300A  ASP*     3.2    22.0    -      -       +      +
    301A  ASP*     2.8    13.0    +      -       -      +
    303A  VAL*     1.3    78.6    -      -       +      +
    305A  LEU*     1.3    64.2    +      -       -      +
    307A  ARG*     3.8    23.0    +      -       -      +
    308A  ALA*     3.3    22.3    +      -       -      +
    385A  SER*     3.6    14.6    -      -       -      -
    386A  LYS      3.5    19.7    -      -       -      +
    387A  GLY*     2.9    33.4    -      -       -      +
    388A  LEU*     3.4    20.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 305 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294A  PHE*     4.0    13.9    -      -       +      -
    297A  LEU*     3.9    27.8    -      -       +      -
    301A  ASP*     2.9    18.6    +      -       +      +
    302A  GLN*     3.9     5.2    -      -       -      +
    304A  ILE*     1.3    77.3    -      -       -      +
    306A  LEU*     1.3    61.9    +      -       -      +
    308A  ALA*     3.4     3.8    +      -       -      +
    309A  GLY*     3.3    17.3    +      -       -      -
    379A  VAL      5.1     1.0    -      -       -      +
    380A  LEU*     3.4    38.3    -      -       +      +
    381A  PHE*     4.1    10.3    -      -       +      -
    382A  ASN*     3.4    30.5    -      -       -      +
    385A  SER*     3.8     8.2    +      -       -      +
    388A  LEU*     4.1    11.0    -      -       +      -
    394A  VAL*     4.0    13.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 306 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284A  LEU*     4.1    26.9    -      -       +      -
    285A  VAL*     4.0    19.3    -      -       +      +
    288A  ALA*     4.2    15.0    -      -       +      -
    294A  PHE*     4.4     7.4    -      -       +      -
    302A  GLN      3.3    16.8    +      -       -      +
    303A  VAL      4.1     0.9    -      -       -      +
    305A  LEU*     1.3    76.0    -      -       -      +
    307A  ARG*     1.3    63.8    +      -       -      +
    308A  ALA      2.9     6.9    +      -       -      -
    309A  GLY      3.0     0.4    +      -       -      +
    310A  TRP*     2.9    29.8    +      -       +      +
    313A  LEU*     4.2     6.5    -      -       +      -
    380A  LEU*     3.6    24.7    -      -       +      -
    456A  LEU*     3.5    35.9    -      -       +      -
    460A  LEU*     4.8     6.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 307 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303A  VAL*     3.1    20.0    +      -       -      +
    304A  ILE*     4.1    29.5    +      -       -      +
    306A  LEU*     1.3    77.8    -      -       -      +
    308A  ALA*     1.3    59.1    +      -       -      +
    310A  TRP*     3.3    20.4    +      -       -      +
    386A  LYS      5.4     2.6    +      -       -      -
    452A  ILE*     3.9    19.1    -      -       +      -
    453A  ASP*     3.1    39.5    +      -       +      +
    456A  LEU*     3.4    13.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 308 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    304A  ILE      3.3    18.4    +      -       -      +
    305A  LEU      3.6     4.9    -      -       -      +
    306A  LEU      2.9     0.6    -      -       -      -
    307A  ARG*     1.3    84.6    -      -       -      +
    309A  GLY*     1.3    57.2    +      -       -      +
    310A  TRP      3.8     0.4    -      -       -      -
    311A  ASN*     3.9     8.1    -      -       -      +
    312A  GLU*     4.5     7.1    -      -       -      +
    382A  ASN*     4.9    11.0    +      -       +      +
    385A  SER*     3.7    22.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 309 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    305A  LEU      3.3     8.8    +      -       -      -
    306A  LEU      3.0     3.0    +      -       -      -
    308A  ALA*     1.3    80.6    -      -       -      +
    310A  TRP*     1.3    58.7    +      -       -      +
    311A  ASN*     3.3     6.7    -      -       -      -
    312A  GLU*     3.3     6.2    +      -       -      +
    313A  LEU*     2.8    43.5    +      -       -      +
    379A  VAL*     4.1    17.2    -      -       -      +
    380A  LEU*     6.1     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 310 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    281A  LEU*     3.8    26.5    -      -       +      -
    284A  LEU*     3.6    19.3    -      -       +      -
    306A  LEU      2.9    15.0    +      -       -      +
    307A  ARG*     3.3    32.1    +      -       -      +
    309A  GLY*     1.3    76.5    -      -       -      +
    311A  ASN*     1.3    93.9    +      -       +      +
    313A  LEU*     3.6     9.6    -      -       -      +
    314A  LEU*     2.9    40.6    +      -       +      +
    438A  LEU*     4.7     5.1    -      -       +      +
    441A  LEU*     4.3    25.4    -      -       +      -
    446A  LEU*     3.5    33.4    -      -       +      -
    452A  ILE*     4.0    29.6    -      -       +      +
    456A  LEU*     5.5     3.1    -      -       +      -
    700A  OLA      4.3    15.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 311 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308A  ALA      3.9    10.7    -      -       -      +
    309A  GLY*     3.8     8.0    -      -       -      -
    310A  TRP*     1.3   110.6    +      -       +      +
    312A  GLU*     1.3    79.6    +      -       -      +
    315A  ILE*     3.1    34.6    +      -       +      +
    434A  GLY*     2.9    37.8    +      -       -      +
    435A  LEU*     6.0     0.4    -      -       -      +
    437A  CYS*     5.6     1.8    -      -       +      -
    438A  LEU*     3.4    22.0    -      -       +      +
    700A  OLA      3.6    10.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 312 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308A  ALA      4.5     8.0    -      -       -      +
    309A  GLY*     3.3     8.7    +      -       -      +
    310A  TRP      3.3     0.2    -      -       -      -
    311A  ASN*     1.3    89.9    +      -       -      +
    313A  LEU*     1.3    61.4    +      -       -      +
    315A  ILE*     3.4     1.5    +      -       -      -
    316A  ALA*     2.9    30.8    +      -       -      +
    379A  VAL*     4.1    21.1    -      -       +      +
    427A  LEU*     4.9     1.4    -      -       -      +
    430A  LEU*     3.5    48.1    -      -       +      +
    431A  ARG*     3.0    47.8    +      -       -      +
    434A  GLY*     4.4     6.7    -      -       -      -
    382B  THR*     5.9     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 313 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284A  LEU*     4.0    20.2    -      -       +      -
    287A  TRP*     3.8    21.5    -      -       +      -
    306A  LEU*     4.2    14.6    -      -       +      -
    309A  GLY*     2.8    35.4    +      -       -      +
    310A  TRP*     3.6    11.4    -      -       -      +
    311A  ASN      3.3     0.2    -      -       -      -
    312A  GLU*     1.3    78.5    -      -       -      +
    314A  LEU*     1.3    60.7    +      -       +      +
    316A  ALA*     3.4     3.5    +      -       -      +
    317A  SER      3.3    16.3    +      -       -      -
    376A  ARG*     3.3    61.7    +      -       +      +
    379A  VAL*     4.0    11.7    -      -       +      -
    380A  LEU*     4.6     7.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 314 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    277A  ALA*     3.6    38.8    -      -       +      +
    280A  GLN*     3.7    26.7    -      -       +      +
    281A  LEU*     4.4     8.1    -      -       +      +
    284A  LEU*     4.1    24.2    -      -       +      -
    310A  TRP*     2.9    29.9    +      -       +      +
    313A  LEU*     1.3    77.8    -      -       -      +
    315A  ILE*     1.3    65.8    +      -       -      +
    316A  ALA      3.3     0.2    +      -       -      -
    317A  SER*     3.3     5.6    +      -       -      -
    318A  ALA*     3.0    24.8    +      -       -      +
    376A  ARG*     4.7     5.6    -      -       -      +
    700A  OLA      3.8    33.1    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 315 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    311A  ASN*     3.1    20.5    +      -       +      +
    312A  GLU*     3.4     5.1    +      -       -      +
    314A  LEU*     1.3    76.4    -      -       -      +
    316A  ALA*     1.3    56.2    +      -       -      +
    318A  ALA*     3.9     4.8    -      -       -      +
    319A  SER*     2.9    37.9    +      -       -      +
    354A  VAL*     4.4     8.7    -      -       +      -
    358A  LEU*     3.8    17.9    -      -       +      -
    430A  LEU*     3.7    15.5    -      -       +      -
    433A  ILE*     4.2    10.1    -      -       +      -
    434A  GLY*     3.8    22.4    -      -       -      -
    437A  CYS*     3.7    30.1    -      -       +      -
    700A  OLA      3.7    27.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 316 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    312A  GLU      2.9    17.7    +      -       -      +
    313A  LEU*     3.6     6.7    -      -       -      +
    314A  LEU      3.1     0.2    -      -       -      -
    315A  ILE*     1.3    78.0    -      -       -      +
    317A  SER*     1.3    61.3    +      -       -      +
    319A  SER*     3.3     6.0    +      -       -      -
    320A  HIS      3.2    17.3    +      -       -      -
    358A  LEU*     6.0     0.9    -      -       -      -
    362A  MET*     4.0     5.4    -      -       +      +
    372A  LEU*     3.4    19.9    -      -       +      +
    375A  LEU*     6.5     0.9    -      -       +      -
    376A  ARG*     4.1    20.6    -      -       +      +
    379A  VAL*     6.4     0.2    -      -       +      -
    430A  LEU*     4.2    17.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 317 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    244A  GLU*     3.6     4.9    +      -       -      -
    247A  VAL*     5.9     0.5    -      -       -      +
    280A  GLN*     4.7     9.8    +      -       -      -
    313A  LEU      3.3     5.3    +      -       -      -
    314A  LEU*     3.9     7.0    -      -       -      -
    316A  ALA*     1.3    78.4    -      -       -      +
    318A  ALA*     1.3    58.6    +      -       -      +
    319A  SER      3.3     0.2    +      -       -      -
    320A  HIS*     3.3     2.9    +      -       -      +
    321A  ARG*     2.9    44.3    +      -       -      +
    372A  LEU*     4.3     9.5    -      -       -      +
    376A  ARG*     3.0    39.7    +      -       -      +
    700A  OLA      5.3     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 318 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    314A  LEU      3.0    16.7    +      -       -      +
    315A  ILE*     4.1     2.7    -      -       -      +
    317A  SER*     1.3    76.6    -      -       -      +
    319A  SER*     1.3    57.3    +      -       -      +
    321A  ARG*     3.3    29.8    +      -       -      +
    322A  SER*     2.6    33.8    +      -       -      -
    329A  ILE*     4.4    16.3    -      -       +      +
    330A  LEU      4.3     0.3    -      -       -      +
    700A  OLA      3.7    21.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 319 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    315A  ILE      2.9    22.2    +      -       -      -
    316A  ALA*     3.5     6.3    -      -       -      -
    317A  SER      3.2     0.2    -      -       -      -
    318A  ALA*     1.3    74.9    -      -       -      +
    320A  HIS*     1.3    65.3    +      -       -      +
    322A  SER      3.1     8.7    +      -       -      -
    323A  ILE*     3.6     4.3    +      -       -      +
    329A  ILE*     5.7     0.4    -      -       -      -
    354A  VAL*     3.4    25.9    -      -       -      +
    358A  LEU*     3.4    19.8    -      -       -      +
    359A  VAL*     3.2    27.3    -      -       -      +
    362A  MET*     3.8    17.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 320 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316A  ALA      3.2     8.5    +      -       -      +
    317A  SER      3.7     1.6    -      -       -      +
    319A  SER*     1.3    78.4    -      -       -      +
    321A  ARG*     1.3    63.7    +      -       -      +
    323A  ILE*     3.0    47.9    +      -       +      +
    362A  MET*     3.6     8.7    -      -       -      -
    367A  MET*     2.6    40.0    +      -       +      -
    368A  ASP*     3.8     1.6    +      -       -      -
    369A  LYS*     3.9    40.1    -      -       +      +
    372A  LEU*     3.7    39.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 321 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249A  PRO*     3.5    33.6    -      -       -      +
    280A  GLN*     4.0     9.7    -      -       -      +
    317A  SER*     2.9    33.0    +      -       -      +
    318A  ALA*     3.3    18.6    -      -       -      +
    319A  SER      3.3     0.2    -      -       -      -
    320A  HIS*     1.3    77.7    +      -       -      +
    322A  SER*     1.3    57.9    -      -       -      +
    323A  ILE      3.4     1.4    +      -       -      -
    324A  ALA*     4.3     9.0    +      -       -      +
    330A  LEU*     3.1    43.2    +      -       +      +
    331A  LEU      3.8     5.5    +      -       -      -
    332A  ALA*     3.1    11.3    -      -       -      +
    700A  OLA      2.5    43.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 322 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    318A  ALA      2.6    22.0    +      -       -      -
    319A  SER      3.1     7.1    +      -       -      -
    320A  HIS      3.0     1.0    -      -       -      -
    321A  ARG*     1.3    76.0    -      -       -      +
    323A  ILE*     1.3    64.6    +      -       -      +
    324A  ALA      3.1     2.2    -      -       -      -
    325A  VAL*     3.0    38.3    -      -       -      +
    328A  GLY      3.9     9.1    -      -       -      +
    329A  ILE*     3.4     6.7    -      -       -      +
    330A  LEU*     3.0    22.3    +      -       -      +
    359A  VAL*     3.7    19.3    -      -       -      +
----------------------------------------------------------
 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