Contacts of the helix formed by residues 438 - 463 (chain G) in PDB entry 4KYI


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 GLU 438 (chain G).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431G  ALA*     5.0     0.8    -      -       -      +
    436G  LYS      3.3     8.3    -      -       -      +
    437G  SER*     1.3    94.0    +      -       -      +
    439G  LYS*     1.3    62.7    +      -       +      +
    440G  GLU*     4.5     8.5    -      -       +      +
    441G  ILE*     2.9    23.3    +      -       +      +
    442G  PHE*     2.4    44.6    +      -       -      +
     82H  ARG*     4.6     1.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 439 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    435G  GLU      5.9     0.7    -      -       -      -
    438G  GLU*     1.3    76.8    -      -       +      +
    440G  GLU*     1.3    61.8    +      -       -      +
    442G  PHE*     3.8    10.3    -      -       +      +
    443G  GLU*     3.2    36.3    +      -       -      +
     82H  ARG*     3.1    44.3    +      -       -      +
     85H  SER*     5.3     4.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 440 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     22G  LYS*     3.4    25.4    -      -       -      +
     28G  TYR*     2.3    42.0    +      -       +      -
    416G  PRO*     4.7     6.8    -      -       +      +
    438G  GLU*     3.0     6.7    +      -       +      +
    439G  LYS*     1.3    79.0    -      -       -      +
    441G  ILE*     1.3    71.6    +      -       +      +
    443G  GLU*     3.5     5.3    +      -       -      +
    444G  ALA*     3.4    19.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 441 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     20G  ILE*     3.8    34.1    -      -       +      +
     22G  LYS*     5.8     4.0    -      -       +      +
     28G  TYR*     4.5    11.2    -      -       +      -
    416G  PRO*     3.8    26.7    -      -       +      -
    420G  ILE*     4.7    10.5    -      -       +      -
    429G  LYS*     4.4    17.0    -      -       -      +
    431G  ALA*     4.2    15.3    -      -       +      -
    438G  GLU*     2.9    22.7    +      -       +      +
    440G  GLU*     1.3    82.4    -      -       +      +
    442G  PHE*     1.3    59.8    +      -       -      +
    444G  ALA*     3.7     3.9    -      -       +      -
    445G  SER*     2.8    29.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 442 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    431G  ALA*     3.3    30.3    -      -       -      +
    432G  LEU*     3.7    34.3    -      -       +      +
    438G  GLU      2.4    32.3    +      -       -      +
    439G  LYS*     3.8    10.1    -      -       +      +
    441G  ILE*     1.3    75.4    -      -       -      +
    443G  GLU*     1.3    71.1    +      -       +      +
    445G  SER*     3.6     0.5    +      -       -      -
    446G  ALA*     3.4    14.6    +      -       -      +
     82H  ARG*     3.4    57.0    -      -       -      +
     83H  TYR*     3.6    31.4    -      +       -      -
     85H  SER*     4.5     3.8    -      -       -      -
     86H  LEU*     3.9    21.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 443 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    439G  LYS*     3.2    23.4    +      -       +      +
    440G  GLU*     3.9     5.2    -      -       -      +
    441G  ILE      3.2     0.6    -      -       -      -
    442G  PHE*     1.3    81.3    -      -       +      +
    444G  ALA*     1.3    60.1    +      -       -      +
    445G  SER      3.2     1.6    -      -       -      -
    446G  ALA*     3.0    15.1    +      -       -      +
    447G  HIS*     3.1    38.5    +      -       +      +
    484G  ASP      5.0     4.0    -      -       -      +
     85H  SER*     4.0    23.9    +      -       -      +
     86H  LEU*     4.1    20.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 444 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    415G  HIS*     5.0     2.9    -      -       +      -
    416G  PRO*     3.9    29.4    -      -       +      -
    417G  LEU*     3.9    19.4    -      -       +      +
    420G  ILE*     4.2     6.8    -      -       +      +
    440G  GLU      3.4    13.8    +      -       -      +
    441G  ILE*     3.3     5.1    +      -       -      +
    443G  GLU*     1.3    78.1    -      -       -      +
    445G  SER*     1.3    61.1    +      -       -      +
    446G  ALA      3.4     0.3    +      -       -      -
    447G  HIS*     3.5    16.4    +      -       +      +
    448G  ALA*     3.4    22.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 445 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    420G  ILE*     4.4    23.3    -      -       -      +
    429G  LYS*     5.8     0.3    +      -       -      -
    430G  ASP*     4.5     3.1    +      -       -      -
    431G  ALA*     3.9    24.6    +      -       -      +
    432G  LEU*     3.9    20.2    -      -       -      +
    441G  ILE      2.8    17.3    +      -       -      -
    442G  PHE      3.8     5.8    -      -       -      -
    443G  GLU      3.2     0.4    -      -       -      -
    444G  ALA*     1.3    76.1    -      -       -      +
    446G  ALA*     1.3    58.6    +      -       -      +
    448G  ALA*     4.3     3.0    -      -       -      +
    449G  GLN*     3.7    16.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 446 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    432G  LEU*     4.0     9.2    -      -       +      -
    442G  PHE      3.4     6.8    +      -       -      +
    443G  GLU      3.0    10.0    +      -       -      +
    445G  SER*     1.3    79.6    -      -       -      +
    447G  HIS*     1.3    65.8    +      -       -      +
    448G  ALA      3.3     0.2    -      -       -      -
    449G  GLN*     3.1    11.4    +      -       -      +
    450G  ALA*     3.1    20.6    +      -       -      +
     55H  GLY*     5.9     0.2    -      -       -      -
     86H  LEU*     3.6    38.1    -      -       +      -
     89H  MET*     4.3     9.0    -      -       +      +
     90H  TYR*     4.9     5.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 447 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    415G  HIS*     5.6     1.1    -      +       -      -
    417G  LEU*     3.7    28.3    -      -       +      -
    443G  GLU*     3.1    37.2    +      -       +      +
    444G  ALA*     3.5    15.3    -      -       +      +
    445G  SER      3.6     0.2    -      -       -      -
    446G  ALA*     1.3    75.9    -      -       -      +
    448G  ALA*     1.3    51.2    +      -       -      +
    450G  ALA*     3.1     4.5    +      -       -      +
    451G  ILE*     2.8    39.1    +      -       -      +
    480G  ILE*     3.8    16.4    -      -       +      +
    484G  ASP*     3.4    39.0    +      -       +      +
    485G  ALA*     4.3     7.0    -      -       +      -
     86H  LEU*     5.0     3.4    -      -       +      -
     89H  MET*     3.3    23.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 448 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417G  LEU*     3.9     8.0    -      -       +      +
    420G  ILE*     3.6    30.3    -      -       +      -
    421G  LEU*     3.8    20.1    -      -       +      +
    425G  HIS*     6.0     2.0    -      -       +      -
    444G  ALA      3.4     8.9    +      -       -      +
    445G  SER      4.4     2.9    -      -       -      +
    446G  ALA      3.3     0.2    -      -       -      -
    447G  HIS*     1.3    79.2    -      -       -      +
    449G  GLN*     1.3    53.3    +      -       -      +
    451G  ILE*     3.7     8.2    -      -       -      +
    452G  LEU*     2.8    35.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 449 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    432G  LEU*     3.4    20.5    -      -       +      +
    445G  SER      3.7    12.3    +      -       -      +
    446G  ALA*     3.1    12.1    +      -       -      +
    448G  ALA*     1.3    76.3    -      -       -      +
    450G  ALA*     1.3    65.0    +      -       -      +
    452G  LEU*     3.4     6.3    +      -       -      +
    453G  HIS*     3.0    39.3    +      -       +      +
     54H  ILE*     3.4    21.6    +      -       -      +
     55H  GLY*     3.2     5.5    -      -       -      -
     56H  ALA*     2.5    40.4    +      -       -      +
     90H  TYR*     4.3     3.8    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 450 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446G  ALA      3.1     3.6    +      -       -      +
    447G  HIS      3.1     8.1    +      -       -      +
    449G  GLN*     1.3    79.0    -      -       -      +
    451G  ILE*     1.3    63.7    +      -       -      +
    453G  HIS*     3.2     6.0    +      -       -      +
    454G  LEU*     3.2    24.6    +      -       -      +
    480G  ILE*     3.7    19.5    -      -       +      -
     75H  TRP*     3.6    31.8    -      -       +      -
     89H  MET*     3.8    18.6    -      -       -      -
     90H  TYR*     4.8     2.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 451 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    417G  LEU*     4.2    17.5    -      -       +      -
    421G  LEU*     4.2    11.7    -      -       +      -
    447G  HIS      2.8    20.1    +      -       -      +
    448G  ALA*     3.7     5.4    -      -       -      +
    450G  ALA*     1.3    75.7    -      -       -      +
    452G  LEU*     1.3    51.5    +      -       -      +
    454G  LEU*     3.0    11.5    +      -       -      +
    455G  GLN*     2.8    57.4    +      -       +      +
    477G  ILE*     4.1    22.7    -      -       +      -
    480G  ILE*     3.9    26.0    -      -       +      -
    481G  LEU*     4.1    23.8    -      -       +      -
    499G  CYS*     4.1     7.9    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 452 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365G  TYR*     4.6    11.9    -      -       +      +
    421G  LEU*     6.2     3.1    -      -       +      -
    425G  HIS*     4.1    27.6    -      -       +      +
    448G  ALA      2.8    21.1    +      -       -      +
    449G  GLN*     3.8     6.5    -      -       -      +
    450G  ALA      3.3     0.2    -      -       -      -
    451G  ILE*     1.3    70.9    -      -       -      +
    453G  HIS*     1.3    65.0    +      -       -      +
    455G  GLN*     3.3    24.9    -      -       +      +
    456G  GLU*     3.1    52.9    +      -       +      +
    502G  GLN*     5.6     0.2    -      -       -      +
    506G  LEU*     5.5     3.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 453 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449G  GLN*     3.0    30.0    +      -       +      +
    450G  ALA      3.3     8.5    -      -       -      +
    451G  ILE      3.1     0.2    -      -       -      -
    452G  LEU*     1.3    78.5    -      -       -      +
    454G  LEU*     1.3    60.9    +      -       -      +
    456G  GLU*     3.6    11.6    +      -       -      +
    457G  GLN*     3.2    26.7    +      -       -      +
     56H  ALA      2.9    27.7    +      -       -      -
     57H  ALA*     4.5     2.0    -      -       -      -
     58H  PHE*     3.5    46.9    +      -       +      +
     75H  TRP*     3.9    16.4    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 454 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    450G  ALA      3.4    13.7    -      -       -      +
    451G  ILE      3.0     6.3    +      -       -      +
    453G  HIS*     1.3    74.8    -      -       -      +
    455G  GLN*     1.3    64.8    +      -       -      +
    457G  GLN*     3.1     4.8    +      -       -      +
    458G  ILE*     3.0    31.4    +      -       -      +
    473G  TYR*     3.9    22.6    -      -       +      +
    476G  GLN*     3.4    48.2    -      -       +      +
    477G  ILE*     3.7    27.6    -      -       +      +
    480G  ILE*     4.2    12.6    -      -       +      -
     58H  PHE*     4.6    13.5    -      -       +      -
     75H  TRP*     4.2    15.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 455 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365G  TYR*     4.4     2.9    +      -       -      -
    421G  LEU*     5.0     3.8    -      -       -      +
    451G  ILE*     2.8    34.2    +      -       +      +
    452G  LEU*     3.3    28.1    -      -       +      +
    454G  LEU*     1.3    74.6    -      -       -      +
    456G  GLU*     1.3    60.7    +      -       -      +
    458G  ILE*     3.4     5.0    +      -       -      +
    459G  VAL*     3.2    28.4    +      -       -      +
    477G  ILE*     4.1     6.5    -      -       +      +
    499G  CYS*     3.4    45.9    +      -       -      +
    502G  GLN*     3.5    22.2    +      -       -      +
    503G  VAL*     3.9    22.4    -      -       +      +
    506G  LEU*     4.8     7.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 456 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    452G  LEU*     3.1    42.0    +      -       +      +
    453G  HIS*     4.0    10.8    +      -       -      +
    455G  GLN*     1.3    79.1    -      -       +      +
    457G  GLN*     1.3    54.1    +      -       -      +
    459G  VAL*     3.5     8.0    +      -       -      +
    460G  LYS*     2.8    34.0    +      -       -      +
    506G  LEU*     5.3     8.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 457 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453G  HIS      3.2    15.0    +      -       -      +
    454G  LEU*     3.1     7.5    +      -       +      +
    456G  GLU*     1.3    76.0    -      -       +      +
    458G  ILE*     1.3    64.0    +      -       -      +
    459G  VAL      3.2     0.2    -      -       -      -
    460G  LYS*     3.8    28.0    -      -       +      +
    461G  GLU*     3.1    50.1    +      -       -      +
    473G  TYR*     4.3    15.2    -      -       +      -
     58H  PHE*     3.4    27.7    +      -       +      -
     59H  LEU*     5.3     0.4    -      -       -      +
     60H  THR*     3.0    31.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 458 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    454G  LEU      3.0    22.1    +      -       -      +
    455G  GLN*     3.4     6.3    +      -       -      +
    457G  GLN*     1.3    75.0    -      -       -      +
    459G  VAL*     1.3    62.2    +      -       -      +
    461G  GLU*     4.4     2.0    -      -       -      +
    462G  MET*     3.2    53.4    +      -       +      +
    470G  VAL*     4.1    30.2    -      -       +      +
    473G  TYR*     3.5    37.5    -      -       +      -
    474G  LEU*     4.2    21.1    -      -       +      +
    477G  ILE*     4.8     3.1    -      -       +      -
    503G  VAL*     3.7    22.7    -      -       +      -
    511G  LEU*     4.9     1.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 459 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    455G  GLN      3.2    16.3    +      -       -      +
    456G  GLU*     3.6     9.0    -      -       -      +
    458G  ILE*     1.3    75.9    -      -       -      +
    460G  LYS*     1.3    66.6    +      -       -      +
    462G  MET*     3.6     7.3    +      -       -      +
    463G  ASN*     3.1    32.4    +      -       -      +
    503G  VAL*     3.8    20.9    -      -       +      +
    506G  LEU*     3.3    50.9    -      -       +      +
    507G  SER*     4.1     5.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 460 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    464E  ASP*     3.5    32.6    +      -       -      +
    456G  GLU      2.8    22.1    +      -       -      +
    457G  GLN*     3.3    33.9    +      -       -      +
    459G  VAL*     1.3    74.4    -      -       -      +
    461G  GLU*     1.3    61.5    +      -       +      +
    463G  ASN*     3.0    23.3    +      -       -      +
    464G  ASP*     3.3    11.8    +      -       +      +
     60H  THR*     5.4     5.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 461 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    457G  GLN*     3.1    33.6    +      -       -      +
    458G  ILE*     4.5     2.5    -      -       -      +
    460G  LYS*     1.3    84.3    -      -       +      +
    462G  MET*     1.3    52.2    +      -       +      +
    464G  ASP*     2.8    10.5    +      -       -      +
    465G  GLY      2.8    31.4    +      -       -      -
    466G  ASP*     3.1    36.9    +      -       +      +
    469G  SER*     3.0    22.6    +      -       -      -
    470G  VAL*     6.1     1.1    -      -       +      +
    473G  TYR*     3.3    15.5    +      -       -      -
     60H  THR*     4.9     0.9    -      -       -      +
     71H  LYS*     2.7    30.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 462 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    458G  ILE*     3.2    34.5    +      -       +      +
    459G  VAL*     4.0     3.1    -      -       -      +
    461G  GLU*     1.3    76.0    -      -       -      +
    463G  ASN*     1.3    61.2    +      -       -      +
    464G  ASP      3.1     2.6    +      -       -      -
    465G  GLY*     3.8     6.0    +      -       -      -
    466G  ASP      3.8    12.6    -      -       -      +
    467G  TYR*     3.6    50.7    +      -       +      +
    470G  VAL*     4.1    16.4    -      -       +      -
    503G  VAL*     4.4     3.1    -      -       +      -
    507G  SER*     3.7    29.6    -      -       -      +
    510G  LYS*     3.8    10.9    +      -       +      +
    511G  LEU*     3.8    31.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 463 (chain G). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    459G  VAL*     3.1    27.3    +      -       -      +
    460G  LYS*     3.0    10.1    +      -       -      +
    462G  MET*     1.3    76.1    -      -       -      +
    464G  ASP*     1.3    60.4    +      -       -      +
    506G  LEU      5.0     4.0    +      -       -      -
    507G  SER*     4.3     9.8    +      -       -      +
    510G  LYS*     3.0    38.7    +      -       -      +
----------------------------------------------------------
 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