Contacts of the helix formed by residues 293 - 317 (chain B) in PDB entry 2GPV


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 SER 293 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    291B  THR      4.1     0.2    +      -       -      -
    292B  LEU*     1.3    79.4    -      -       -      +
    294B  LEU*     1.3    64.3    +      -       -      +
    295B  ALA*     4.0     3.8    -      -       -      -
    296B  ASP*     3.0    33.5    +      -       -      +
    297B  GLN*     3.0    21.0    +      -       -      +
    383B  GLU*     3.3    21.9    +      -       -      -
    384B  ASP*     6.3     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 294 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292B  LEU      3.8     0.2    +      -       -      -
    293B  SER*     1.3    73.2    -      -       -      +
    295B  ALA*     1.3    62.1    +      -       -      +
    297B  GLN*     3.5    24.5    +      -       -      +
    298B  MET*     3.1    33.5    +      -       +      +
   1328H  LEU*     4.7    23.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 295 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    293B  SER*     3.2     1.5    -      -       -      +
    294B  LEU*     1.3    79.0    -      -       -      +
    296B  ASP*     1.3    57.1    +      -       -      +
    298B  MET*     3.4    13.7    +      -       +      +
    299B  SER*     3.0    30.4    +      -       -      -
    381B  HIS      5.9     1.8    -      -       -      +
    383B  GLU*     3.1    32.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 296 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    292B  LEU*     4.1    20.1    -      -       +      +
    293B  SER*     3.0    27.1    +      -       -      +
    295B  ALA*     1.3    77.3    -      -       -      +
    297B  GLN*     1.3    64.3    +      -       -      +
    299B  SER*     3.1     4.6    +      -       -      -
    300B  LEU*     3.0    29.9    +      -       +      +
    381B  HIS      4.2     1.2    -      -       -      +
    382B  ILE*     3.4    18.8    -      -       +      +
    383B  GLU*     2.7    32.4    +      -       -      +
    384B  ASP*     3.2    28.9    +      -       -      +
    388B  VAL*     5.0     2.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 297 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    284B  LYS*     5.2     3.1    -      -       -      +
    289B  PHE*     3.4    48.9    +      -       +      +
    290B  SER*     3.3    19.6    +      -       -      +
    292B  LEU*     3.1    26.2    +      -       +      +
    293B  SER      3.0    16.2    +      -       -      +
    294B  LEU*     3.8    21.1    -      -       -      +
    295B  ALA      3.4     0.2    -      -       -      -
    296B  ASP*     1.3    75.1    -      -       -      +
    298B  MET*     1.3    62.8    +      -       -      +
    300B  LEU*     3.7     0.4    +      -       -      -
    301B  LEU*     3.3    30.7    +      -       -      +
   1328H  LEU*     3.4    29.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 298 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    294B  LEU*     3.1    22.4    +      -       +      +
    295B  ALA*     3.5    11.0    -      -       +      +
    296B  ASP      3.1     0.2    -      -       -      -
    297B  GLN*     1.3    79.0    -      -       -      +
    299B  SER*     1.3    59.7    +      -       -      +
    301B  LEU*     3.5     1.9    +      -       -      +
    302B  GLN*     2.9    42.4    +      -       -      +
   1321H  GLU*     4.6    23.3    -      -       -      +
   1324H  ILE*     4.2    12.3    -      -       +      +
   1325H  ARG*     3.7    57.0    -      -       +      +
   1328H  LEU*     3.9    17.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 299 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    295B  ALA      3.0    16.8    +      -       -      -
    296B  ASP*     3.1     8.0    +      -       -      -
    298B  MET*     1.3    73.7    -      -       -      +
    300B  LEU*     1.3    66.0    +      -       -      +
    302B  GLN*     3.2    15.3    +      -       -      +
    303B  SER*     3.1    25.8    +      -       -      -
    379B  SER*     3.6    18.1    +      -       -      -
    381B  HIS*     3.6    27.0    +      -       -      +
    382B  ILE*     4.0    14.8    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 300 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    289B  PHE*     4.2    14.6    -      -       +      -
    292B  LEU*     4.0    23.1    -      -       +      -
    296B  ASP      3.0    17.7    +      -       -      +
    297B  GLN      4.1     3.1    -      -       -      +
    299B  SER*     1.3    76.0    -      -       -      +
    301B  LEU*     1.3    57.4    +      -       -      +
    303B  SER*     3.3     0.7    +      -       -      -
    304B  ALA*     2.9    28.8    +      -       -      +
    374B  LEU*     3.5    30.3    -      -       +      +
    375B  ALA*     4.4     8.7    -      -       -      +
    377B  SER*     3.2    16.3    +      -       -      +
    378B  ASP      6.0     0.9    -      -       -      +
    379B  SER*     4.9     3.8    -      -       -      +
    382B  ILE*     3.5    29.2    -      -       +      -
    388B  VAL*     4.1    24.2    -      -       +      -
    391B  LEU*     4.5     3.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 301 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276B  LEU*     6.1     1.6    -      -       +      -
    279B  ILE*     4.6    19.1    -      -       +      -
    280B  ILE*     4.3    22.7    -      -       +      -
    283B  ALA*     4.4    15.7    -      -       +      -
    289B  PHE*     4.0    15.7    -      -       +      -
    297B  GLN      3.3    20.0    +      -       -      +
    298B  MET      3.7     3.8    -      -       -      +
    299B  SER      3.2     0.4    -      -       -      -
    300B  LEU*     1.3    79.8    -      -       -      +
    302B  GLN*     1.3    57.9    +      -       -      +
    303B  SER      3.1     0.2    +      -       -      -
    305B  TRP*     2.9    38.8    +      -       +      +
    308B  ILE*     5.1     2.7    -      -       +      -
    374B  LEU*     4.0    15.7    -      -       +      -
   1324H  ILE*     3.8    33.9    -      -       +      -
   1328H  LEU*     4.3    10.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 302 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    298B  MET*     2.9    34.6    +      -       -      +
    299B  SER*     3.7    14.6    +      -       -      +
    301B  LEU*     1.3    76.2    -      -       -      +
    303B  SER*     1.3    58.1    -      -       -      +
    305B  TRP*     3.0    25.4    +      -       -      +
    381B  HIS*     5.3     7.4    -      -       -      -
   1320H  LEU*     4.4    12.4    -      -       +      +
   1321H  GLU*     3.4    38.9    +      -       +      +
   1324H  ILE*     3.8    17.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 303 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299B  SER      3.1     9.8    +      -       -      -
    301B  LEU      3.1     0.4    -      -       -      -
    302B  GLN*     1.3    80.7    -      -       -      +
    304B  ALA*     1.3    57.1    +      -       -      +
    305B  TRP*     3.6     3.1    +      -       -      -
    306B  MET*     5.0     1.2    +      -       -      +
    307B  GLU*     4.5     9.0    -      -       -      +
    377B  SER*     3.2    34.5    +      -       -      +
    378B  ASP      4.8     0.2    -      -       -      -
    379B  SER*     3.4    25.4    +      -       -      -
    425B  ARG*     6.0     0.3    -      -       -      -
    428B  SER*     5.0     5.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 304 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    300B  LEU      2.9    16.4    +      -       -      +
    303B  SER*     1.3    75.8    -      -       -      +
    305B  TRP*     1.3    65.7    +      -       -      +
    306B  MET      3.4     2.7    -      -       -      -
    307B  GLU*     3.1    11.4    +      -       +      +
    308B  ILE*     3.0    26.8    +      -       +      +
    373B  ALA      3.6    13.7    -      -       -      +
    374B  LEU*     3.6    20.2    -      -       +      +
    377B  SER*     3.5    18.4    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 305 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272B  ALA*     5.6     0.2    -      -       +      -
    276B  LEU*     4.1    34.1    -      -       +      -
    279B  ILE*     4.6     6.0    -      -       +      +
    301B  LEU*     2.9    19.4    +      -       +      +
    302B  GLN*     3.0    29.6    +      -       -      -
    303B  SER      4.4     2.2    -      -       -      -
    304B  ALA*     1.3    76.2    -      -       -      +
    306B  MET*     1.3    92.9    +      -       +      +
    308B  ILE*     3.2    10.8    +      -       -      +
    309B  LEU*     3.0    35.0    +      -       +      +
    432B  VAL*     4.4    21.0    -      -       +      +
    435B  PHE*     5.8     4.5    -      +       -      -
    436B  TYR*     5.0    10.8    -      +       -      -
    501B  OHT      3.7    49.6    -      +       -      -
   1320H  LEU*     3.3    31.9    -      -       +      +
   1324H  ILE*     5.5     0.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 306 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303B  SER      5.0     1.1    +      -       -      +
    304B  ALA      3.4     0.6    -      -       -      -
    305B  TRP*     1.3   102.2    -      -       +      +
    307B  GLU*     1.3    56.6    +      -       -      +
    309B  LEU*     3.5     9.2    +      -       -      +
    310B  ILE*     3.0    36.1    +      -       +      +
    428B  SER*     3.5    19.7    -      -       -      +
    431B  ALA*     3.5    47.1    -      -       +      +
    432B  VAL*     3.8    17.0    -      -       +      +
    435B  PHE*     5.2     2.5    -      -       +      -
    501B  OHT      3.6    49.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 307 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    303B  SER      4.5     6.5    +      -       -      +
    304B  ALA*     3.1    17.3    +      -       -      +
    306B  MET*     1.3    76.9    -      -       -      +
    308B  ILE*     1.3    59.2    +      -       -      +
    311B  LEU*     3.0    28.8    +      -       -      +
    373B  ALA*     3.7    31.6    -      -       +      +
    377B  SER*     5.2     2.3    -      -       -      -
    421B  LEU*     4.9     4.2    -      -       -      +
    424B  LEU*     3.6    27.8    -      -       +      +
    425B  ARG*     2.8    51.1    +      -       -      -
    428B  SER*     3.4    24.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 308 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279B  ILE*     3.6    44.9    -      -       +      -
    282B  TRP*     4.0    17.5    -      -       +      -
    301B  LEU*     5.1     2.2    -      -       +      -
    304B  ALA*     3.0    27.9    +      -       +      +
    305B  TRP*     3.7     6.3    -      -       -      +
    307B  GLU*     1.3    75.0    -      -       +      +
    309B  LEU*     1.3    67.2    +      -       -      +
    311B  LEU*     3.2     6.3    +      -       -      +
    312B  GLY*     2.8    21.7    +      -       -      -
    370B  LYS*     3.8    39.3    -      -       +      +
    373B  ALA*     5.2     2.9    -      -       +      -
    374B  LEU*     4.3    19.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 309 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    272B  ALA*     3.9    12.1    -      -       +      +
    275B  GLU*     3.6    34.9    -      -       +      +
    276B  LEU*     4.6     5.2    -      -       +      +
    279B  ILE*     3.5    23.1    -      -       +      -
    305B  TRP*     3.0    30.9    +      -       +      +
    306B  MET*     3.7    11.0    -      -       -      +
    307B  GLU      3.5     0.2    -      -       -      -
    308B  ILE*     1.3    75.4    -      -       -      +
    310B  ILE*     1.3    62.9    +      -       -      +
    312B  GLY*     3.3     2.4    +      -       -      -
    313B  VAL*     3.2    21.1    +      -       -      +
    316B  ARG*     4.7     0.7    +      -       -      -
    501B  OHT      3.6    58.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 310 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    306B  MET*     3.0    27.6    +      -       +      +
    307B  GLU      4.1     2.5    -      -       -      +
    309B  LEU*     1.3    73.4    -      -       -      +
    311B  LEU*     1.3    67.0    +      -       -      +
    312B  GLY      3.0     1.5    +      -       -      -
    313B  VAL*     3.2     9.2    -      -       +      +
    314B  VAL*     2.8    35.5    +      -       +      +
    349B  ILE*     4.3    18.8    -      -       +      -
    352B  LEU*     4.1     9.2    -      -       +      -
    424B  LEU*     3.7    17.9    -      -       +      -
    427B  THR*     3.9    15.7    -      -       +      -
    428B  SER*     3.7    27.8    -      -       -      +
    431B  ALA*     3.9    19.5    -      -       +      -
    501B  OHT      4.9     6.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 311 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    307B  GLU      3.0    18.9    +      -       -      +
    308B  ILE*     3.8     3.1    -      -       -      +
    310B  ILE*     1.3    76.1    -      -       -      +
    312B  GLY*     1.3    56.7    +      -       -      +
    314B  VAL*     3.7     6.1    -      -       +      +
    315B  TYR*     2.9    25.1    +      -       -      +
    356B  TYR*     3.9    35.0    -      -       +      +
    361B  LEU*     5.7     3.4    -      -       +      -
    366B  PHE*     3.4    23.5    -      -       +      +
    369B  LEU*     3.8    17.9    -      -       +      +
    370B  LYS*     3.6    40.8    -      -       +      +
    373B  ALA*     4.8     1.3    -      -       +      -
    421B  LEU*     5.8     0.9    -      -       +      -
    424B  LEU*     4.0    26.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 312 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308B  ILE      2.8    13.2    +      -       -      -
    309B  LEU*     3.5     4.3    -      -       -      -
    310B  ILE      3.0     1.0    -      -       -      -
    311B  LEU*     1.3    72.4    -      -       -      +
    313B  VAL*     1.3    65.9    +      -       -      -
    314B  VAL      2.9     1.7    +      -       -      -
    315B  TYR*     3.0     4.9    +      -       -      +
    316B  ARG*     3.0    42.4    +      -       -      +
    366B  PHE*     3.9    16.3    -      -       -      -
    370B  LYS*     5.4     0.4    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 313 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    309B  LEU      3.2    13.7    +      -       -      +
    310B  ILE*     3.2    24.7    -      -       +      +
    312B  GLY*     1.3    71.2    -      -       -      +
    314B  VAL*     1.3    57.2    +      -       -      +
    316B  ARG*     3.3    25.1    -      -       -      +
    317B  SER*     2.5    43.2    +      -       -      +
    324B  LEU*     4.1    21.3    -      -       +      -
    325B  VAL      3.9    10.1    -      -       -      +
    326B  TYR*     3.9    24.5    -      -       +      -
    349B  ILE*     4.3    11.7    -      -       +      -
    501B  OHT      4.0    11.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 314 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    310B  ILE*     2.8    27.1    +      -       +      +
    311B  LEU*     3.7     8.7    -      -       +      +
    313B  VAL*     1.3    75.3    -      -       -      +
    315B  TYR*     1.3    66.3    +      -       -      +
    317B  SER*     3.1    12.6    +      -       -      -
    318B  LEU*     3.4    15.6    +      -       +      +
    349B  ILE*     3.4    37.7    -      -       +      +
    352B  LEU*     3.9    18.4    -      -       +      +
    353B  VAL*     4.1    12.8    -      -       +      +
    356B  TYR*     3.6    33.7    -      -       +      -
    361B  LEU*     5.9     0.7    -      -       +      -
    424B  LEU*     5.7     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 315 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    311B  LEU      2.9     9.2    +      -       -      +
    312B  GLY      3.7     2.5    -      -       -      +
    314B  VAL*     1.3    76.9    -      -       -      +
    316B  ARG*     1.3    72.1    +      -       +      +
    317B  SER      3.1     0.9    +      -       -      -
    318B  LEU*     3.3    43.8    +      -       +      +
    319B  SER*     5.1     0.7    +      -       -      -
    361B  LEU*     4.3    10.0    +      -       +      -
    362B  GLU*     4.0     4.4    -      -       -      -
    363B  LYS*     3.2    60.8    +      -       +      +
    366B  PHE*     3.6    48.7    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 316 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    248B  LYS*     6.4     1.6    -      -       -      -
    275B  GLU*     3.9    17.7    +      -       -      -
    312B  GLY*     3.0    36.7    +      -       -      +
    313B  VAL*     3.3    20.3    -      -       -      +
    315B  TYR*     1.3    84.1    -      -       +      +
    317B  SER*     1.3    59.4    +      -       -      +
    318B  LEU      3.5     0.6    +      -       -      -
    319B  SER*     4.2     4.3    +      -       -      -
    320B  PHE*     4.0    12.6    -      -       -      -
    325B  VAL*     3.0    41.8    +      -       +      +
    326B  TYR      2.8    29.2    +      -       -      -
    327B  ALA*     4.6     2.9    -      -       -      +
    328B  ASP*     5.9     1.1    -      -       -      -
    366B  PHE*     6.3     0.7    -      -       +      -
    501B  OHT      3.3    22.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 317 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    313B  VAL      2.5    22.7    +      -       -      -
    314B  VAL      3.1     5.6    +      -       -      -
    315B  TYR      3.0     1.0    -      -       -      -
    316B  ARG*     1.3    76.7    -      -       -      +
    318B  LEU*     1.3    62.2    +      -       -      +
    319B  SER      3.3     3.4    -      -       -      -
    320B  PHE*     3.0    29.7    +      -       -      +
    323B  GLU      3.6    15.7    -      -       -      +
    324B  LEU*     3.3     7.6    -      -       -      +
    325B  VAL      2.9    22.8    +      -       -      +
    353B  VAL*     3.9    20.7    -      -       -      +
----------------------------------------------------------
 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