Contacts of the helix formed by residues 157 - 180 (chain A) in PDB entry 6DWM


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 CYS 157 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146A  SER      3.7    13.2    -      -       -      +
    147A  ILE*     3.3    17.7    -      -       -      +
    148A  ALA      3.2    17.7    -      -       -      +
    149A  SER*     4.2     2.5    -      -       -      +
    150A  ASP*     4.0     6.3    -      -       -      +
    156A  SER*     1.3    78.1    -      -       -      +
    158A  TYR*     1.3    67.7    +      -       -      +
    159A  LEU*     4.4     1.8    -      -       -      -
    160A  GLU*     3.5    17.6    +      -       -      -
    161A  GLU*     3.1    22.3    +      -       -      +
    359A  LEU*     3.9    21.8    -      -       -      -
    465A  TRP*     4.9     5.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  SER      3.8    22.2    -      -       -      -
    145A  PHE*     3.5    44.1    -      +       +      +
    146A  SER      3.6     4.2    +      -       -      +
    148A  ALA*     3.2    25.8    +      -       +      -
    149A  SER      3.9    14.4    -      -       -      -
    150A  ASP*     3.9    25.0    -      -       -      +
    151A  PRO*     3.1    25.1    -      -       +      +
    157A  CYS*     1.3    74.5    -      -       -      +
    159A  LEU*     1.3    65.6    +      -       -      +
    161A  GLU*     3.1     4.7    +      -       -      +
    162A  HIS*     3.0    44.8    +      +       -      +
    278A  ILE      5.4     1.7    +      -       -      -
    279A  ARG      5.4     4.3    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146A  SER*     3.0    25.0    +      -       -      +
    147A  ILE*     6.3     0.2    -      -       +      -
    157A  CYS*     4.4     4.0    -      -       -      -
    158A  TYR*     1.3    75.8    -      -       -      +
    160A  GLU*     1.3    59.5    +      -       -      +
    162A  HIS*     3.2     5.9    +      -       -      -
    163A  VAL*     2.9    44.0    +      -       +      +
    197A  VAL*     3.8    25.4    -      -       +      -
    201A  ILE*     4.1    13.9    -      -       +      -
    359A  LEU*     5.0     3.1    -      -       +      -
    462A  ILE*     4.0    32.3    -      -       +      +
    465A  TRP*     3.7    40.6    -      -       +      -
    466A  GLU*     4.1     8.1    -      -       +      +
    469A  LEU*     5.8     0.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156A  SER*     3.6    18.3    -      -       -      -
    157A  CYS*     3.5    13.9    +      -       -      +
    158A  TYR      3.3     0.6    -      -       -      -
    159A  LEU*     1.3    78.2    -      -       -      +
    161A  GLU*     1.3    61.4    +      -       -      +
    163A  VAL*     4.3     0.3    -      -       -      +
    164A  SER*     2.8    38.0    +      -       -      +
    357A  PRO      4.3     1.3    -      -       -      +
    358A  ARG*     3.0    58.2    +      -       -      +
    359A  LEU*     3.7    35.2    +      -       +      +
    360A  SER      5.3     0.2    +      -       -      -
    469A  LEU*     3.8    20.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  ASP*     4.2    17.3    -      -       -      +
    152A  ALA*     5.5     2.6    -      -       -      +
    153A  SER*     3.4    23.5    +      -       -      -
    156A  SER*     2.8    25.5    +      -       -      -
    157A  CYS      3.1    14.0    +      -       -      +
    158A  TYR      3.1     8.0    +      -       -      +
    160A  GLU*     1.3    79.3    -      -       -      +
    162A  HIS*     1.3    67.0    +      -       +      +
    164A  SER*     3.7     5.2    -      -       -      -
    165A  LYS*     3.2    21.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150A  ASP*     5.2     2.9    -      -       -      -
    158A  TYR*     3.0    44.4    +      +       +      +
    159A  LEU*     3.8     4.0    -      -       -      +
    161A  GLU*     1.3    82.1    -      -       +      +
    163A  VAL*     1.3    65.4    +      -       -      +
    165A  LYS*     3.2     6.9    +      -       -      +
    166A  GLU*     3.1    28.3    +      -       +      +
    197A  VAL*     4.1    21.5    -      -       +      -
    200A  ALA*     4.0    28.0    +      -       +      +
    201A  ILE*     3.9    27.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  LEU*     2.9    36.1    +      -       +      +
    162A  HIS*     1.3    75.7    -      -       -      +
    164A  SER*     1.3    57.1    +      -       -      +
    167A  ALA*     2.9    27.4    +      -       -      +
    197A  VAL*     4.0    13.7    -      -       +      -
    466A  GLU*     4.0    25.4    -      -       +      -
    469A  LEU*     3.6    37.7    -      -       +      -
    470A  PHE*     3.6    30.9    -      -       +      +
    473A  ILE*     4.8     2.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160A  GLU*     2.8    30.7    +      -       -      +
    161A  GLU*     3.7     6.7    -      -       -      -
    163A  VAL*     1.3    74.7    -      -       -      +
    165A  LYS*     1.3    65.0    +      -       -      +
    167A  ALA*     3.4     2.4    +      -       -      +
    168A  GLU*     3.3    28.7    +      -       -      +
    356A  ARG*     3.4    31.9    +      -       -      +
    357A  PRO      5.3     1.0    +      -       -      -
    469A  LEU*     4.9     1.7    -      -       -      +
    473A  ILE*     4.1    15.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  GLU      3.2    10.3    +      -       -      +
    162A  HIS*     3.2     9.8    +      -       -      +
    164A  SER*     1.3    80.4    -      -       -      +
    166A  GLU*     1.3    66.5    +      -       +      +
    168A  GLU*     3.2     8.2    +      -       -      +
    169A  VAL*     3.2    28.5    +      -       +      +
    206A  ARG*     3.6    35.4    -      -       -      +
    210C  ASN*     5.8     7.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  HIS*     3.1    17.2    +      -       +      +
    165A  LYS*     1.3    79.4    -      -       +      +
    167A  ALA*     1.3    60.4    +      -       -      +
    169A  VAL*     3.8     5.4    -      -       -      +
    170A  LEU*     2.8    31.9    +      -       -      +
    193A  SER*     3.7    31.0    +      -       -      +
    196A  ASN*     3.2    29.1    +      -       +      +
    197A  VAL*     3.9     9.0    -      -       +      +
    206A  ARG*     2.6    47.1    +      -       -      +
    209A  HIS*     4.8     0.7    +      -       -      -
    470A  PHE*     4.1    13.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  VAL*     2.9    20.3    +      -       +      +
    164A  SER      3.7     4.5    -      -       -      +
    165A  LYS      3.3     0.2    -      -       -      -
    166A  GLU*     1.3    77.0    -      -       -      +
    168A  GLU*     1.3    56.1    +      -       -      +
    170A  LEU*     3.4     5.0    +      -       -      +
    171A  ILE*     3.0    35.5    +      -       -      +
    470A  PHE*     4.0    14.3    -      -       +      -
    473A  ILE*     3.6    35.4    -      -       +      -
    474A  LEU*     4.0     9.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164A  SER      3.3    14.5    +      -       -      +
    165A  LYS*     3.2     8.5    +      -       -      +
    166A  GLU      3.2     0.6    -      -       -      -
    167A  ALA*     1.3    75.9    -      -       -      +
    169A  VAL*     1.3    67.5    +      -       +      +
    171A  ILE*     3.0     7.6    +      -       -      +
    172A  SER*     3.0    26.4    +      -       -      +
    356A  ARG*     3.0    23.9    -      -       -      +
    473A  ILE*     4.5     4.4    -      -       -      +
    477A  ARG*     2.6    45.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  LYS*     3.2    25.8    +      -       +      +
    166A  GLU*     4.0     6.3    -      -       -      +
    168A  GLU*     1.3    76.0    -      -       +      +
    170A  LEU*     1.3    57.4    +      -       -      +
    172A  SER*     3.8     7.1    -      -       -      -
    173A  THR*     2.8    38.7    +      -       -      +
    206A  ARG*     3.8    33.2    -      -       -      +
    209A  HIS*     3.8    20.2    -      -       +      -
    208C  ASP*     5.3    10.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  GLU      2.8    19.2    +      -       -      +
    167A  ALA      3.6     5.2    -      -       -      +
    168A  GLU      3.1     0.2    -      -       -      -
    169A  VAL*     1.3    77.6    -      -       -      +
    171A  ILE*     1.3    61.9    +      -       -      +
    173A  THR*     3.4     3.7    +      -       -      -
    174A  LEU*     3.1    44.6    +      -       +      +
    189A  TYR*     3.8    27.6    -      -       +      +
    190A  VAL*     4.4    18.4    -      -       +      +
    193A  SER*     3.5    27.3    +      -       -      +
    209A  HIS*     4.2     5.8    -      -       +      -
    326A  ILE*     6.4     0.9    -      -       +      -
    470A  PHE*     4.5    11.9    -      -       +      -
    474A  LEU*     3.9    29.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167A  ALA      3.0    16.9    +      -       -      +
    168A  GLU*     3.0     8.6    +      -       -      +
    170A  LEU*     1.3    74.4    -      -       -      +
    172A  SER*     1.3    66.7    +      -       -      +
    174A  LEU*     3.2     7.9    +      -       +      +
    175A  GLN*     3.0    41.5    +      -       +      +
    473A  ILE*     4.3    14.4    -      -       +      +
    474A  LEU*     4.0    24.7    -      -       +      -
    477A  ARG*     3.7    47.3    -      -       +      +
    478A  VAL*     4.3    21.3    -      -       +      -
    508A  MET*     4.1     1.9    -      -       +      +
    510A  LEU*     5.2     0.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168A  GLU*     3.0    16.1    +      -       -      +
    169A  VAL*     3.8     7.5    -      -       -      -
    171A  ILE*     1.3    77.4    -      -       -      +
    173A  THR*     1.3    64.5    +      -       -      +
    175A  GLN*     3.2    27.1    +      -       -      +
    176A  GLU*     3.2    25.7    +      -       -      +
    208C  ASP*     5.1    15.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  VAL*     2.8    29.2    +      -       -      +
    170A  LEU*     3.7     7.2    -      -       -      -
    171A  ILE      3.3     0.2    -      -       -      -
    172A  SER*     1.3    77.6    -      -       -      +
    174A  LEU*     1.3    60.6    +      -       -      +
    176A  GLU*     3.5    15.6    +      -       -      +
    177A  LEU*     3.5    22.5    +      -       +      +
    189A  TYR*     3.7    36.6    -      -       +      -
    209A  HIS*     3.9    27.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  LEU*     3.1    36.8    +      -       +      +
    171A  ILE*     3.8     1.6    -      -       -      +
    173A  THR*     1.3    76.2    -      -       -      +
    175A  GLN*     1.3    64.4    +      -       -      +
    177A  LEU*     3.3    13.8    +      -       +      +
    178A  MET*     3.2    25.5    +      -       -      +
    184A  PHE*     3.3    39.1    -      -       +      -
    186A  PRO*     5.5     1.3    -      -       +      -
    189A  TYR*     4.7    14.8    -      -       +      -
    190A  VAL*     6.2     2.0    -      -       +      -
    474A  LEU*     5.3     2.0    -      -       +      -
    480A  PHE*     3.9    23.1    -      -       +      -
    508A  MET*     3.5    30.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  ILE*     3.0    23.7    +      -       -      +
    172A  SER*     3.6    27.5    +      -       -      +
    174A  LEU*     1.3    76.8    -      -       -      +
    176A  GLU*     1.3    61.8    +      -       +      +
    178A  MET*     3.2    15.5    +      -       -      +
    179A  ALA*     3.2    13.7    +      -       -      +
    508A  MET*     3.6    17.9    -      -       +      -
    510A  LEU*     3.4    34.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  SER*     3.2    23.3    +      -       -      +
    173A  THR*     3.7    13.8    +      -       -      +
    174A  LEU      3.3     0.2    -      -       -      -
    175A  GLN*     1.3    76.7    -      -       +      +
    177A  LEU*     1.3    61.9    +      -       +      +
    179A  ALA*     3.2     6.9    +      -       -      +
    180A  GLY*     3.2    18.0    +      -       -      -
    181A  PRO*     4.7     0.5    -      -       -      +
    205C  ARG*     4.0    23.6    +      -       -      +
    206C  ARG      5.6     3.3    -      -       -      +
    207C  TYR*     4.3     9.8    -      -       +      -
    211C  HIS*     2.8    44.0    +      -       -      -
    213C  GLU*     5.4     0.3    -      -       -      +
    268C  GLU*     5.4     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  THR*     3.5    17.4    +      -       +      +
    174A  LEU*     3.3    16.0    +      -       +      +
    175A  GLN      3.3     0.4    -      -       -      -
    176A  GLU*     1.3    78.7    -      -       +      +
    178A  MET*     1.3    59.7    +      -       -      +
    181A  PRO*     3.2    25.2    -      -       +      +
    182A  GLY*     2.8    24.0    +      -       -      -
    183A  HIS      4.0     7.5    +      -       -      +
    184A  PHE*     3.7    28.0    -      -       +      -
    189A  TYR*     3.3    55.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  LEU      3.2    14.5    +      -       -      +
    175A  GLN*     3.2    10.1    +      -       -      +
    177A  LEU*     1.3    76.8    -      -       -      +
    179A  ALA*     1.3    60.9    +      -       -      +
    182A  GLY*     3.2    44.1    +      -       -      +
    184A  PHE*     4.1     9.4    -      -       +      -
    507A  GLN*     3.9    16.2    -      -       +      +
    508A  MET*     3.3    51.6    -      -       +      +
    509A  GLN*     3.7    18.8    -      -       -      +
    272C  THR*     5.7     3.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175A  GLN      3.2    10.7    +      -       -      +
    176A  GLU*     3.2     6.7    +      -       -      +
    178A  MET*     1.3    79.7    -      -       -      +
    180A  GLY*     1.3    59.6    +      -       -      +
    205C  ARG*     3.1    34.0    +      -       +      +
    268C  GLU*     4.1    17.7    -      -       -      +
    272C  THR*     4.6     9.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176A  GLU      3.2    11.3    +      -       -      -
    177A  LEU      3.4     0.8    +      -       -      -
    178A  MET      4.7     0.2    -      -       -      +
    179A  ALA*     1.3    80.2    -      -       -      +
    181A  PRO*     1.3    74.0    -      -       -      +
    182A  GLY*     3.1     1.3    +      -       -      -
    268C  GLU*     3.4    33.9    +      -       -      +
    271C  LYS*     4.2    14.6    -      -       -      +
    272C  THR*     5.4     2.1    -      -       -      +
----------------------------------------------------------
 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