Contacts of the helix formed by residues 225 - 246 (chain W) in PDB entry 3FKS


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 225 (chain W).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134S  LYS*     5.6     0.7    -      -       -      +
    302S  TYR*     3.4    24.0    -      -       +      +
     19W  ALA*     6.1     2.2    -      -       +      -
     63W  ALA*     4.9     7.9    -      -       +      +
     64W  MET*     3.4    10.3    -      -       -      +
     65W  ASP*     3.3    48.0    -      -       -      +
    224W  GLU*     1.3    94.2    -      -       +      +
    226W  PRO*     1.3    76.5    -      -       +      +
    227W  GLY      4.3     4.3    -      -       -      +
    228W  ALA*     3.0    17.0    +      -       +      +
    229W  ARG*     3.1     9.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 226 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299S  ASP*     4.4     8.7    -      -       +      -
    302S  TYR*     3.8    24.5    -      -       +      -
     19W  ALA*     5.8     4.9    -      -       +      -
    225W  PRO*     1.3    88.4    -      -       +      +
    227W  GLY*     1.3    62.4    +      -       -      +
    228W  ALA      3.0     0.5    +      -       -      -
    229W  ARG*     3.2    16.2    +      -       -      +
    230W  ALA*     2.9    26.7    +      -       -      +
    264W  ALA*     4.0     3.5    -      -       +      +
    267W  GLU*     3.5    35.7    -      -       +      +
    268W  VAL*     3.8    18.7    -      -       +      +
    271W  LEU*     4.6    12.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 227 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62W  ILE*     4.3    12.4    -      -       -      +
     63W  ALA      3.4    18.0    +      -       -      -
     64W  MET*     3.2    19.1    -      -       -      +
    225W  PRO*     3.3     2.2    -      -       -      +
    226W  PRO*     1.3    80.5    -      -       -      +
    228W  ALA*     1.3    59.3    +      -       -      +
    230W  ALA*     3.9     2.5    +      -       -      +
    231W  ARG*     3.3    19.2    -      -       -      +
    268W  VAL*     3.9    13.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 228 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63W  ALA      4.2     1.2    +      -       -      -
     64W  MET*     3.9    13.8    -      -       -      +
     98W  VAL*     3.8    18.1    -      -       +      +
    224W  GLU*     3.7    22.9    -      -       +      +
    225W  PRO*     3.0    26.6    +      -       +      +
    227W  GLY*     1.3    74.7    -      -       -      +
    229W  ARG*     1.3    66.9    +      -       -      +
    230W  ALA      3.1     1.3    -      -       -      -
    231W  ARG*     3.0    13.7    +      -       -      +
    232W  VAL*     3.1    18.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 229 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301S  PHE*     3.8    19.7    -      -       -      -
    302S  TYR*     3.6    24.7    -      -       -      +
    187W  VAL*     3.3    17.9    -      -       +      +
    188W  GLY*     4.4     8.1    -      -       -      +
    220W  GLY*     3.6    23.1    -      -       -      +
    221W  GLN      3.9     8.5    -      -       -      +
    222W  MET*     3.9     9.9    +      -       -      +
    224W  GLU*     3.1    29.3    +      -       +      +
    225W  PRO      3.1     4.9    +      -       -      +
    226W  PRO*     3.2    16.1    +      -       -      +
    228W  ALA*     1.3    78.9    -      -       -      +
    230W  ALA*     1.3    58.3    +      -       -      +
    231W  ARG      3.1     1.8    +      -       -      -
    232W  VAL*     3.1    24.6    +      -       -      +
    260W  ARG*     5.1     7.6    +      -       -      +
    261W  PHE*     4.5     3.8    -      -       -      -
    263W  GLN*     4.8     3.8    -      -       -      +
    264W  ALA*     3.8    23.2    -      -       +      +
    267W  GLU*     2.8    32.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 230 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226W  PRO      2.9    15.9    +      -       -      +
    227W  GLY*     4.2     5.2    -      -       -      +
    228W  ALA      3.1     0.4    -      -       -      -
    229W  ARG*     1.3    77.0    -      -       -      +
    231W  ARG*     1.3    76.9    +      -       +      +
    234W  LEU*     4.4     2.3    -      -       -      +
    261W  PHE*     3.9    25.9    -      -       +      -
    264W  ALA*     4.1    10.7    -      -       +      +
    265W  GLY*     4.5    10.3    -      -       -      +
    268W  VAL*     3.9    19.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 231 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34W  LEU*     4.4     5.9    -      -       -      +
     49W  GLU*     2.8    35.1    +      -       -      +
     62W  ILE*     5.1     4.2    -      -       -      +
     64W  MET*     3.9    13.2    -      -       +      +
     98W  VAL*     4.2    12.3    -      -       +      -
    117W  ILE*     4.4    11.5    -      -       +      +
    118W  HIS*     3.0    25.2    -      -       -      -
    227W  GLY      3.3    18.5    +      -       -      +
    228W  ALA      3.0     5.7    +      -       -      +
    230W  ALA*     1.3    94.2    +      -       -      +
    232W  VAL*     1.3    60.2    -      -       -      +
    233W  ALA      3.1     2.7    -      -       -      -
    234W  LEU*     2.8    39.9    +      -       -      +
    235W  THR*     3.1    11.2    +      -       -      +
    268W  VAL*     5.8     6.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 232 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98W  VAL*     3.5    25.5    -      -       +      +
    185W  THR*     3.6    11.5    -      -       +      +
    187W  VAL*     3.5    20.6    -      -       +      -
    218W  VAL*     4.0     3.5    -      -       +      +
    219W  PHE      3.9     4.5    -      -       -      +
    220W  GLY*     3.4    34.1    -      -       -      +
    224W  GLU*     4.5     0.7    -      -       -      +
    228W  ALA      3.1    16.0    +      -       -      +
    229W  ARG*     3.1    28.0    -      -       -      +
    231W  ARG*     1.3    76.7    -      -       -      +
    233W  ALA*     1.3    64.1    +      -       -      +
    235W  THR*     2.9    19.7    +      -       -      -
    236W  GLY      3.1    11.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 233 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185W  THR*     4.2     4.9    -      -       -      -
    187W  VAL*     3.8    17.9    -      -       +      -
    229W  ARG      4.5     0.2    +      -       -      -
    231W  ARG      3.1     0.4    -      -       -      -
    232W  VAL*     1.3    82.3    -      -       -      +
    234W  LEU*     1.3    61.0    +      -       -      +
    236W  GLY*     3.9     0.7    +      -       -      -
    237W  LEU*     3.3    23.2    +      -       -      +
    255W  ILE*     4.7    16.1    -      -       +      +
    261W  PHE*     3.7    33.4    -      -       +      -
    292W  LEU*     4.1    18.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 234 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117W  ILE*     3.8    16.5    -      -       +      +
    118W  HIS*     3.3    36.6    -      -       +      +
    230W  ALA      4.4     3.8    -      -       -      +
    231W  ARG*     2.8    35.3    +      -       +      +
    233W  ALA*     1.3    76.7    -      -       +      +
    235W  THR*     1.3    57.4    +      -       -      +
    237W  LEU*     3.6     4.4    -      -       -      +
    238W  THR*     2.7    34.7    +      -       -      -
    261W  PHE*     5.4     4.9    -      -       +      -
    291W  LEU*     5.3     2.7    -      -       +      +
    292W  LEU*     3.8    30.5    -      -       +      +
    295W  ARG*     3.5    23.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 235 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85W  VAL*     3.6    26.3    -      -       +      +
     96W  ILE*     5.3     2.7    -      -       +      -
     97W  ASN      3.8    16.6    -      -       -      +
     98W  VAL*     3.3    17.7    +      -       -      +
    117W  ILE*     3.9    15.4    -      -       -      +
    218W  VAL*     4.0    16.2    -      -       +      -
    231W  ARG      3.1    11.3    +      -       -      -
    232W  VAL*     2.9    17.5    +      -       -      -
    234W  LEU*     1.3    76.1    -      -       -      +
    236W  GLY*     1.3    64.4    +      -       -      +
    238W  THR*     3.1    15.4    +      -       -      -
    239W  ILE*     3.4    16.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 236 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183W  VAL*     3.2    14.8    -      -       -      +
    185W  THR*     3.4    20.9    -      -       -      -
    218W  VAL*     3.6    18.7    -      -       -      +
    232W  VAL      3.1     7.7    +      -       -      -
    233W  ALA      4.4     0.2    -      -       -      -
    235W  THR*     1.3    80.2    -      -       -      +
    237W  LEU*     1.3    60.7    +      -       -      +
    239W  ILE*     3.5     2.5    +      -       -      +
    240W  ALA      3.2    15.8    +      -       -      -
    253W  LEU*     3.5     8.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 237 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233W  ALA      3.3    19.1    +      -       -      +
    234W  LEU*     3.6     4.3    -      -       +      +
    235W  THR      3.1     0.4    -      -       -      -
    236W  GLY*     1.3    74.9    -      -       -      +
    238W  THR*     1.3    65.3    +      -       -      +
    240W  ALA*     3.1     3.0    +      -       +      +
    241W  GLU*     2.9    41.9    +      -       +      +
    253W  LEU*     3.4    28.4    -      -       +      +
    292W  LEU*     3.6    33.9    -      -       +      +
    295W  ARG*     3.6    39.3    -      -       +      +
    296W  ILE*     4.2    12.6    -      -       +      -
    304W  VAL*     4.7     9.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 238 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85W  VAL*     4.0    10.5    -      -       +      -
     87W  VAL*     4.2     5.6    -      -       +      +
    115W  LYS*     3.9    27.9    -      -       +      +
    116W  PRO      3.1    20.4    -      -       -      +
    117W  ILE*     3.2    22.3    +      -       -      +
    234W  LEU      2.7    21.9    +      -       -      -
    235W  THR      3.1     7.1    +      -       -      -
    237W  LEU*     1.3    76.5    -      -       -      +
    239W  ILE*     1.3    63.0    +      -       -      +
    241W  GLU*     2.9    34.0    +      -       -      +
    242W  TYR*     3.3     6.4    +      -       -      +
    295W  ARG*     3.8     1.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 239 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85W  VAL*     4.6     5.4    -      -       +      -
     86W  PRO*     3.8    19.5    -      -       +      +
     87W  VAL*     3.9    11.7    -      -       +      -
     91W  THR*     3.6    30.1    -      -       +      +
     96W  ILE*     4.6    15.7    -      -       +      -
    183W  VAL*     4.0    13.9    -      -       +      -
    216W  ALA*     4.6     4.7    -      -       +      -
    218W  VAL*     3.7    30.5    -      -       +      -
    235W  THR*     3.5    15.0    -      -       +      +
    236W  GLY*     3.7     5.2    -      -       -      +
    237W  LEU      3.3     0.4    -      -       -      -
    238W  THR*     1.3    76.4    -      -       -      +
    240W  ALA*     1.3    61.4    +      -       -      +
    241W  GLU      3.3     0.5    +      -       -      -
    242W  TYR*     3.4     6.8    +      -       -      +
    243W  PHE*     2.9    36.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 240 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183W  VAL*     3.9    11.6    -      -       +      +
    236W  GLY      3.2    10.5    +      -       -      +
    237W  LEU*     3.1    11.3    +      -       -      +
    239W  ILE*     1.3    79.2    -      -       -      +
    241W  GLU*     1.3    61.0    +      -       -      +
    243W  PHE*     3.5     8.6    +      -       -      -
    244W  ARG      3.7     0.5    +      -       -      -
    251W  VAL*     3.5    40.8    -      -       +      +
    253W  LEU*     4.2    20.2    -      -       +      -
    304W  VAL*     3.9    13.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 241 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115W  LYS*     6.1     1.6    -      -       +      -
    119W  ALA*     4.2     7.9    -      -       -      +
    237W  LEU*     2.9    26.8    +      -       +      +
    238W  THR*     2.9    17.2    +      -       -      +
    240W  ALA*     1.3    76.0    -      -       -      +
    242W  TYR*     1.3    53.9    +      -       -      +
    244W  ARG*     2.8    28.9    +      -       -      +
    245W  ASP*     2.7    47.0    +      -       -      +
    295W  ARG*     2.8    58.4    +      -       -      +
    304W  VAL*     4.6     3.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 242 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87W  VAL*     3.6    37.7    -      -       +      -
     88W  GLY*     3.7    29.2    -      -       -      +
    112W  LYS*     4.0    16.6    +      -       -      +
    113W  LEU*     3.8    29.9    -      -       +      +
    115W  LYS*     4.2    24.0    -      -       +      +
    238W  THR      3.3     4.8    +      -       -      +
    239W  ILE      3.4     7.3    +      -       -      +
    241W  GLU*     1.3    78.8    -      -       -      +
    243W  PHE*     1.3    61.6    +      +       +      +
    245W  ASP*     4.5     3.6    -      -       -      +
    246W  GLU*     3.0    67.6    +      -       +      +
    247W  GLU*     3.8    11.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 243 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88W  GLY      3.1    37.7    -      -       -      -
     89W  ARG*     4.5     4.9    -      -       +      -
     91W  THR*     4.4     0.4    -      -       -      -
     92W  LEU*     3.9    21.8    -      -       +      -
    181W  PHE*     3.3    49.1    -      +       +      -
    183W  VAL*     5.1     4.7    -      -       +      -
    239W  ILE*     2.9    41.7    -      -       +      -
    240W  ALA*     3.7     3.8    -      -       -      +
    241W  GLU      3.1     0.6    -      -       -      -
    242W  TYR*     1.3    78.8    -      +       +      +
    244W  ARG*     1.3    57.7    +      -       -      +
    247W  GLU*     3.4    19.9    -      -       -      +
    248W  GLY      3.1    19.9    +      -       -      -
    249W  GLN*     3.3    14.5    +      -       -      +
    251W  VAL*     3.7    23.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 244 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122W  PRO*     4.2    14.3    -      -       -      +
    240W  ALA      4.2     0.4    -      -       -      +
    241W  GLU*     2.8    26.4    +      -       -      +
    243W  PHE*     1.3    78.1    -      -       -      +
    245W  ASP*     1.3    80.5    +      -       -      +
    246W  GLU      3.2     5.3    +      -       -      -
    248W  GLY*     3.4    14.7    +      -       -      +
    249W  GLN      4.3     6.5    -      -       -      +
    251W  VAL*     4.2     2.5    -      -       +      -
    295W  ARG      3.0    26.0    +      -       -      -
    297W  THR*     2.9    27.1    +      -       -      +
    299W  THR*     3.4    25.3    +      -       -      +
    301W  LYS*     3.4    14.6    -      -       -      +
    302W  GLY*     3.5     4.7    -      -       -      -
    303W  SER*     3.3    31.9    -      -       -      +
    304W  VAL*     3.5    31.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 245 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115W  LYS*     4.6    17.0    +      -       -      +
    241W  GLU*     2.7    29.4    +      -       -      +
    242W  TYR*     4.9     0.9    -      -       -      +
    244W  ARG*     1.3    98.3    +      -       -      +
    246W  GLU*     1.3    66.9    +      -       -      +
    299W  THR*     4.7     9.7    +      -       -      +
    301W  LYS*     4.5    23.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 246 (chain W). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    112W  LYS*     5.8     1.4    +      -       -      +
    113W  LEU*     4.5     8.5    -      -       -      +
    115W  LYS*     5.3     6.7    +      -       -      +
    242W  TYR*     3.0    59.1    +      -       +      +
    245W  ASP*     1.3    86.8    -      -       +      +
    247W  GLU*     1.3    62.2    +      -       +      +
    248W  GLY      3.9     0.2    -      -       -      -
    301W  LYS*     6.2     1.8    -      -       -      -
----------------------------------------------------------
 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