Contacts of the helix formed by residues 364 - 388 (chain C) in PDB entry 5HJP


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 364 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362C  SER      4.7     0.9    -      -       -      +
    363C  LEU*     1.4    89.6    -      -       +      +
    365C  LEU*     1.4    66.1    +      -       -      +
    366C  ASP*     3.2     5.6    -      -       +      +
    367C  ASP*     2.8    42.7    +      -       +      +
    368C  GLN*     3.0    10.0    +      -       -      -
    455C  SER*     6.1     2.7    -      -       -      -
    456C  ASN*     6.0     2.9    -      -       +      -
    459C  GLU*     4.7    10.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 365 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363C  LEU      3.5     2.8    +      -       -      -
    364C  PRO*     1.4    68.8    -      -       -      +
    366C  ASP*     1.4    60.7    +      -       -      +
    368C  GLN*     3.3    15.8    +      -       +      +
    369C  VAL*     3.0    31.4    +      -       +      +
    544C  HIS*     4.1    25.8    -      -       +      +
    547C  LEU*     3.8    35.4    -      -       +      -
    548C  GLN*     3.3    33.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 366 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364C  PRO*     3.1     4.7    +      -       +      +
    365C  LEU*     1.4    80.7    -      -       -      +
    367C  ASP*     1.4    62.0    +      -       -      +
    369C  VAL*     3.4    11.0    +      -       -      +
    370C  ILE*     3.0    36.3    +      -       +      +
    544C  HIS*     4.7    13.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 367 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363C  LEU*     4.8     7.7    -      -       +      +
    364C  PRO*     2.8    38.4    +      -       +      +
    366C  ASP*     1.4    75.2    -      -       -      +
    368C  GLN*     1.4    60.4    +      -       -      +
    370C  ILE*     3.7     7.8    -      -       -      +
    371C  LEU*     2.9    35.4    +      -       -      +
    453C  GLY      4.4     0.3    -      -       -      +
    454C  LEU*     3.6    27.1    -      -       +      +
    455C  SER*     3.4    32.9    +      -       -      -
    456C  ASN*     3.6    15.4    +      -       -      +
    460C  VAL*     5.0     3.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 368 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    355C  LYS*     5.3     0.2    -      -       -      +
    360C  PHE*     3.4    53.6    -      -       +      +
    361C  SER*     3.1    24.9    +      -       -      +
    363C  LEU*     2.9    25.7    +      -       +      +
    364C  PRO      3.0    13.1    +      -       -      +
    365C  LEU*     3.4    17.9    -      -       -      +
    367C  ASP*     1.4    75.3    -      -       -      +
    369C  VAL*     1.4    60.6    +      -       -      +
    371C  LEU      3.6     0.2    +      -       -      -
    372C  LEU*     3.2    22.9    +      -       -      +
    547C  LEU*     3.4    35.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 369 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365C  LEU*     3.0    19.1    +      -       +      +
    366C  ASP*     3.4    11.9    -      -       -      +
    367C  ASP      3.2     0.2    -      -       -      -
    368C  GLN*     1.4    73.0    -      -       -      +
    370C  ILE*     1.3    61.7    +      -       +      +
    372C  LEU      3.4     1.2    +      -       -      -
    373C  ARG*     3.0    60.0    +      -       +      +
    543C  LEU*     3.6    11.7    -      -       +      +
    544C  HIS*     3.6    43.1    -      -       +      +
    547C  LEU*     3.7    18.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 370 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366C  ASP*     3.0    26.1    +      -       +      +
    367C  ASP*     3.7    15.5    -      -       -      +
    369C  VAL*     1.3    78.2    -      -       +      +
    371C  LEU*     1.3    56.7    +      -       -      +
    373C  ARG*     3.3     7.0    +      -       -      +
    374C  ALA*     2.9    33.1    +      -       +      +
    451C  ALA*     3.8    20.0    -      -       +      -
    452C  LYS      3.4    21.8    -      -       -      +
    453C  GLY*     3.6    31.0    -      -       -      +
    454C  LEU*     3.8    12.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 371 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    360C  PHE*     3.7    29.2    -      -       +      -
    363C  LEU*     3.8    20.2    -      -       +      -
    367C  ASP      2.9    18.9    +      -       -      +
    368C  GLN      4.0     0.4    -      -       -      +
    369C  VAL      3.4     0.4    -      -       -      -
    370C  ILE*     1.3    74.9    -      -       -      +
    372C  LEU*     1.3    58.0    +      -       -      +
    374C  ALA*     4.2     2.8    -      -       -      +
    375C  GLY*     3.1    24.4    +      -       -      -
    379C  LEU*     5.1     0.2    -      -       -      +
    445C  ILE      5.3     0.2    -      -       -      +
    446C  LEU*     3.5    32.5    -      -       +      +
    447C  PHE*     3.9    12.1    -      -       +      -
    448C  ASN*     3.4    29.8    -      -       +      +
    451C  ALA*     4.3     5.2    -      -       +      -
    454C  LEU*     4.0    17.5    -      -       +      -
    460C  VAL*     4.1    10.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 372 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350C  LEU*     4.1    30.1    -      -       +      +
    351C  VAL*     4.4     8.3    -      -       +      +
    354C  ALA*     3.9    23.1    -      -       +      -
    360C  PHE*     3.9    11.9    -      -       +      -
    368C  GLN      3.2    21.2    +      -       -      +
    369C  VAL      4.0     2.5    -      -       -      +
    371C  LEU*     1.3    73.5    -      -       -      +
    373C  ARG*     1.4    61.7    +      -       -      +
    375C  GLY      4.6     0.2    -      -       -      +
    376C  TRP*     2.9    36.9    +      -       -      +
    379C  LEU*     4.8     2.2    -      -       +      -
    446C  LEU*     4.1    10.3    -      -       +      -
    525C  MET*     3.7     6.5    -      -       +      -
    543C  LEU*     3.7    30.7    -      -       +      -
    547C  LEU*     3.8    21.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 373 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369C  VAL*     3.0    38.1    +      -       -      +
    370C  ILE*     3.7     6.1    -      -       -      +
    372C  LEU*     1.4    76.7    -      -       -      +
    374C  ALA*     1.3    57.8    +      -       -      +
    376C  TRP*     3.0    22.3    +      -       -      -
    524C  GLU*     3.3    41.3    +      -       -      +
    525C  MET*     3.5    30.5    -      -       -      +
    528C  ALA*     3.6    31.0    +      -       +      +
    541C  LYS*     4.2     7.7    -      -       -      +
    543C  LEU*     3.6    12.4    -      -       +      +
    544C  HIS*     3.6    27.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 374 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370C  ILE*     2.9    18.8    +      -       +      +
    371C  LEU*     4.2     3.1    -      -       -      +
    373C  ARG*     1.3    78.9    -      -       -      +
    375C  GLY*     1.3    57.7    -      -       -      +
    376C  TRP*     4.1     0.9    +      -       -      -
    377C  ASN*     5.1     2.9    +      -       -      +
    378C  GLU*     4.4     7.6    -      -       -      +
    448C  ASN*     5.2     9.4    -      -       +      +
    451C  ALA*     4.1    23.1    -      -       +      -
    452C  LYS      5.9     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 375 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371C  LEU      3.1    16.2    +      -       -      -
    374C  ALA*     1.3    76.6    -      -       -      +
    376C  TRP*     1.4    63.3    +      -       -      +
    377C  ASN*     3.1     4.6    +      -       -      -
    378C  GLU*     3.3    10.9    +      -       -      +
    379C  LEU*     3.1    33.0    +      -       -      +
    445C  ILE*     4.1    16.8    -      -       -      +
    448C  ASN*     6.5     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 376 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343C  ALA*     5.1     1.8    -      -       +      -
    347C  LEU*     3.7    15.5    -      -       +      -
    350C  LEU*     3.8    23.1    -      -       +      +
    372C  LEU      2.9    21.9    +      -       -      +
    373C  ARG*     3.0    26.9    +      -       -      -
    374C  ALA      5.0     0.7    -      -       -      -
    375C  GLY*     1.4    69.9    -      -       -      +
    377C  ASN*     1.3    82.0    +      -       +      +
    379C  LEU*     3.7     2.9    -      -       -      +
    380C  LEU*     3.1    43.5    +      -       +      +
    504C  LEU*     3.6    23.2    -      -       +      +
    507C  LEU*     3.8    20.0    -      -       +      -
    522C  LEU*     3.7    30.7    -      -       +      -
    525C  MET*     3.5    51.9    +      -       +      +
    526C  LEU*     4.1     8.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 377 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374C  ALA      5.1     2.6    +      -       -      +
    375C  GLY      3.1     1.4    +      -       -      -
    376C  TRP*     1.3   108.0    -      -       +      +
    378C  GLU*     1.4    60.7    +      -       +      +
    380C  LEU*     3.2     6.1    +      -       -      +
    381C  ILE*     3.0    41.6    +      -       -      +
    500C  GLY*     2.6    43.8    +      -       -      -
    503C  CYS*     4.3     3.5    -      -       -      +
    504C  LEU*     3.9    21.7    -      -       +      +
    507C  LEU*     4.2    10.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 378 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374C  ALA      4.4    12.3    -      -       -      +
    375C  GLY*     3.3     4.2    +      -       -      +
    377C  ASN*     1.4    75.0    -      -       +      +
    379C  LEU*     1.4    57.4    +      -       -      +
    381C  ILE*     3.2     4.6    +      -       -      +
    382C  ALA*     2.9    31.9    +      -       -      +
    445C  ILE*     3.9    29.1    -      -       +      +
    493C  LEU*     4.8     2.1    -      -       -      +
    496C  LEU*     3.8    36.4    -      -       +      +
    497C  ARG*     2.8    56.1    +      -       -      +
    500C  GLY*     4.3    10.5    -      -       -      -
    426D  VAL*     5.2     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 379 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    350C  LEU*     3.7    29.6    -      -       +      -
    353C  TRP*     3.9    11.2    -      -       +      -
    371C  LEU      5.1     0.9    -      -       -      +
    372C  LEU*     4.8     3.1    -      -       +      -
    375C  GLY*     3.1    32.5    +      -       -      +
    376C  TRP*     3.7     6.7    -      -       -      +
    378C  GLU*     1.4    76.5    -      -       -      +
    380C  LEU*     1.4    59.0    +      -       -      +
    382C  ALA*     3.5     2.3    +      -       -      +
    383C  SER*     3.0    12.0    +      -       -      -
    442C  ARG*     2.9    67.2    +      -       +      +
    445C  ILE*     3.9    13.4    -      -       +      +
    446C  LEU*     4.1    23.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 380 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343C  ALA*     3.6    36.1    -      -       +      +
    346C  GLN*     3.6    39.0    -      -       +      +
    347C  LEU*     4.3     3.1    -      -       +      -
    350C  LEU*     4.5    16.2    -      -       +      -
    376C  TRP*     3.1    44.2    +      -       +      +
    377C  ASN*     3.7     4.3    -      -       -      +
    379C  LEU*     1.4    72.7    -      -       -      +
    381C  ILE*     1.4    66.7    +      -       +      +
    383C  SER*     3.1     8.3    +      -       -      +
    384C  PHE*     3.0    36.1    +      -       +      +
    387C  ARG*     5.2     0.5    +      -       -      -
    442C  ARG*     5.1     2.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 381 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377C  ASN*     3.0    46.7    +      -       -      +
    378C  GLU*     3.2     6.5    +      -       -      +
    380C  LEU*     1.4    73.9    -      -       +      +
    382C  ALA*     1.3    56.5    +      -       -      +
    384C  PHE*     3.6    31.3    -      -       +      -
    385C  SER*     2.7    35.8    +      -       -      +
    420C  VAL*     4.6     2.9    -      -       +      -
    424C  LEU*     3.6    27.1    -      -       +      -
    496C  LEU*     3.8     6.3    -      -       +      -
    499C  ILE*     4.0     9.0    -      -       +      -
    500C  GLY*     3.7    13.7    -      -       -      +
    503C  CYS*     3.7    24.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 382 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378C  GLU      2.9    16.3    +      -       -      +
    379C  LEU      3.7     5.4    -      -       -      +
    381C  ILE*     1.3    76.2    -      -       -      +
    383C  SER*     1.4    62.3    +      -       -      +
    385C  SER*     4.6     2.2    -      -       -      -
    386C  HIS*     3.3    16.6    +      -       -      +
    424C  LEU*     5.6     0.9    -      -       -      -
    428C  MET*     3.9     9.2    -      -       +      +
    438C  LEU*     3.4    23.4    -      -       +      +
    441C  LEU*     6.3     0.9    -      -       +      -
    442C  ARG*     3.9    22.2    -      -       +      -
    445C  ILE*     4.5     2.9    -      -       +      -
    496C  LEU*     4.0    19.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 383 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    308C  GLU*     5.2     1.7    +      -       -      -
    346C  GLN*     4.9     7.6    +      -       -      -
    379C  LEU      3.0     3.7    +      -       -      -
    380C  LEU*     3.1    13.0    +      -       -      +
    382C  ALA*     1.4    77.2    -      -       -      +
    384C  PHE*     1.3    59.2    +      -       -      +
    386C  HIS*     3.6     2.8    +      -       -      +
    387C  ARG*     3.0    45.6    +      -       -      +
    438C  LEU*     4.6     8.1    -      -       -      +
    442C  ARG*     2.8    38.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 384 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339C  ILE*     5.8     8.3    -      -       +      -
    380C  LEU*     3.0    26.5    +      -       +      -
    381C  ILE*     3.6    37.2    -      -       +      -
    383C  SER*     1.3    74.8    -      -       -      +
    385C  SER*     1.3    64.1    +      -       -      +
    387C  ARG*     3.6    24.2    -      -       -      +
    388C  SER*     2.7    34.0    +      -       -      -
    395C  ILE*     3.7    30.1    -      -       +      -
    396C  LEU      3.8    11.4    -      -       -      +
    397C  LEU*     4.7    15.3    -      -       +      -
    420C  VAL*     4.1    26.7    -      -       +      -
    503C  CYS*     5.4     4.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 385 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381C  ILE      2.7    22.6    +      -       -      -
    382C  ALA      4.0     2.2    -      -       -      -
    384C  PHE*     1.3    77.5    -      -       -      +
    386C  HIS*     1.3    62.6    +      -       -      +
    388C  SER*     3.2    14.0    +      -       -      -
    389C  ILE*     3.5     9.5    +      -       -      +
    420C  VAL*     3.7    12.6    -      -       -      +
    424C  LEU*     3.7    29.9    -      -       -      +
    425C  VAL*     3.6    22.9    -      -       -      +
    428C  MET*     3.7    19.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 386 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382C  ALA      3.3    15.4    +      -       -      +
    383C  SER      3.9     1.8    -      -       -      +
    385C  SER*     1.3    79.6    -      -       -      +
    387C  ARG*     1.4    60.0    +      -       -      +
    389C  ILE*     3.1    41.5    -      -       +      +
    428C  MET*     3.5    11.1    -      -       -      -
    433C  MET*     2.8    50.6    +      -       +      -
    434C  ASP*     3.7     7.3    +      -       -      -
    435C  LYS*     3.9    35.2    +      -       +      +
    438C  LEU*     3.7    25.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 387 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346C  GLN*     3.8    26.5    -      -       -      +
    380C  LEU      5.2     0.2    +      -       -      -
    383C  SER*     3.0    36.6    +      -       -      +
    384C  PHE*     3.6    31.8    -      -       -      +
    385C  SER      3.3     0.2    -      -       -      -
    386C  HIS*     1.4    75.2    +      -       -      +
    388C  SER*     1.3    55.5    +      -       -      +
    389C  ILE      3.3     3.0    +      -       -      -
    390C  ASP*     4.4     9.7    +      -       -      +
    391C  VAL*     5.1     1.9    +      -       -      +
    396C  LEU*     3.5    44.7    +      -       +      +
    397C  LEU*     4.5     6.3    -      -       -      +
    398C  ALA*     3.6    31.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 388 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384C  PHE      2.7    21.8    +      -       -      -
    385C  SER      3.2     7.1    +      -       -      -
    387C  ARG*     1.3    73.2    -      -       -      +
    389C  ILE*     1.4    57.7    +      -       -      +
    390C  ASP      3.3     2.9    -      -       -      -
    391C  VAL*     2.8    35.6    +      -       -      +
    394C  GLY      3.7    18.6    -      -       -      -
    395C  ILE*     3.3     6.9    -      -       -      +
    396C  LEU*     2.8    26.2    +      -       -      -
    425C  VAL*     3.4    16.6    -      -       -      +
----------------------------------------------------------
 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