Contacts of the helix formed by residues 225 - 245 (chain D) in PDB entry 6CP3


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 D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134C  LYS*     4.5     5.4    -      -       -      +
    302C  TYR*     3.6    18.8    -      -       +      +
     19D  ALA*     5.2     5.2    -      -       +      -
     63D  ALA*     4.7     9.4    -      -       +      -
     64D  MET*     3.9     5.6    -      -       -      +
     65D  ASP*     3.2    43.3    -      -       -      +
     66D  GLY*     4.3     2.5    -      -       -      +
     67D  THR*     5.8     2.2    -      -       +      +
    223D  ASN      4.2     2.9    -      -       -      +
    224D  GLU*     1.3    98.2    -      -       +      +
    226D  PRO*     1.3    74.9    -      -       +      +
    227D  GLY      3.0     3.3    +      -       -      +
    228D  ALA*     3.1    13.2    +      -       -      +
    229D  ARG*     3.7     5.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 226 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    299C  ASP*     5.3     3.4    -      -       +      -
    302C  TYR*     4.7    11.0    -      -       +      -
     19D  ALA*     4.6    13.2    -      -       +      +
     62D  ILE*     5.0     0.9    -      -       +      -
     63D  ALA*     6.2     0.4    -      -       +      -
    225D  PRO*     1.3    86.2    -      -       +      +
    227D  GLY*     1.3    57.0    +      -       -      +
    228D  ALA      3.3     0.2    -      -       -      -
    229D  ARG*     3.8    13.7    -      -       -      +
    230D  ALA*     2.9    29.8    +      -       -      +
    264D  ALA*     3.3    16.2    -      -       +      +
    267D  GLU*     3.3    34.3    -      -       +      +
    268D  VAL*     3.7    26.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 227 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  ILE*     3.7    19.2    -      -       -      +
     63D  ALA*     3.4    21.7    +      -       -      +
     64D  MET*     3.5    10.1    -      -       -      -
    225D  PRO      3.0     1.8    +      -       -      -
    226D  PRO*     1.3    79.5    -      -       -      +
    228D  ALA*     1.3    57.4    +      -       -      +
    230D  ALA*     3.1     5.5    +      -       -      -
    231D  ARG*     3.0    35.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 228 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63D  ALA      4.3     0.8    +      -       -      -
     64D  MET*     3.7    13.7    -      -       -      +
     98D  VAL*     3.7    25.7    -      -       +      +
    220D  GLY*     5.6     1.6    -      -       -      -
    224D  GLU*     3.4    40.4    -      -       +      +
    225D  PRO      3.1     3.8    +      -       -      +
    227D  GLY*     1.3    77.1    -      -       -      +
    229D  ARG*     1.3    59.6    +      -       -      +
    232D  VAL*     2.9    36.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 229 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    301C  PHE*     3.2    34.6    -      -       -      -
    302C  TYR*     3.8    11.1    -      -       -      +
    305C  SER*     4.8     2.0    -      -       -      -
    187D  VAL*     3.6    20.9    -      -       +      +
    188D  GLY*     4.3    10.8    -      -       -      +
    220D  GLY      4.4     6.7    -      -       -      +
    221D  GLN      3.5    25.8    -      -       -      +
    222D  MET*     3.6    19.3    +      -       -      +
    224D  GLU*     3.6    22.5    +      -       +      -
    225D  PRO      3.7     1.2    +      -       -      -
    226D  PRO*     3.4    17.1    +      -       -      +
    227D  GLY      3.3     0.6    -      -       -      -
    228D  ALA*     1.3    77.2    -      -       -      +
    230D  ALA*     1.3    59.3    +      -       -      +
    231D  ARG      3.3     0.4    +      -       -      -
    232D  VAL*     4.3     7.6    +      -       -      +
    233D  ALA      5.0     0.7    +      -       -      -
    260D  ARG*     4.4    10.2    -      -       -      +
    261D  PHE*     3.8    11.8    -      -       -      -
    264D  ALA*     3.8    15.0    -      -       +      -
    267D  GLU*     2.4    32.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 230 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     62D  ILE*     6.3     2.0    -      -       +      -
    226D  PRO      2.9    18.5    +      -       -      +
    227D  GLY*     3.1     7.1    +      -       -      +
    229D  ARG*     1.3    79.8    -      -       -      +
    231D  ARG*     1.3    86.5    +      -       -      +
    233D  ALA      5.3     0.2    -      -       -      -
    234D  LEU*     4.3     0.9    -      -       -      +
    261D  PHE*     3.1    30.5    -      -       +      +
    264D  ALA*     3.9    19.3    -      -       +      +
    265D  GLY*     4.6     2.7    -      -       -      +
    268D  VAL*     6.2     0.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 231 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34D  LEU*     4.4    10.3    -      -       -      +
     49D  GLU*     2.5    43.7    +      -       -      +
     50D  VAL      5.9     0.2    +      -       -      -
     51D  ALA*     6.0     1.2    -      -       -      +
     62D  ILE*     4.3    19.3    -      -       -      +
     64D  MET*     3.7     8.5    -      -       +      -
     83D  ILE*     5.1     0.4    -      -       +      -
     98D  VAL*     3.6    17.3    -      -       +      +
    117D  ILE*     4.3    10.1    -      -       +      +
    118D  HIS*     3.8    10.4    -      -       -      -
    227D  GLY*     3.0    18.2    +      -       -      +
    230D  ALA*     1.3   106.9    +      -       -      +
    232D  VAL*     1.3    59.4    +      -       -      +
    233D  ALA      3.2     2.9    -      -       -      -
    234D  LEU*     2.9    40.3    +      -       -      +
    235D  THR*     3.1     9.5    +      -       -      -
    261D  PHE*     4.7     6.3    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 232 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98D  VAL*     3.7    25.3    -      -       +      +
    185D  THR*     3.7     6.5    -      -       +      +
    186D  GLY      4.6     0.2    -      -       -      +
    187D  VAL*     3.7    30.7    -      -       +      -
    218D  VAL*     3.7    20.1    -      -       +      +
    219D  PHE      4.1     0.2    -      -       -      -
    220D  GLY*     3.5    39.0    -      -       -      +
    228D  ALA      2.9    20.8    +      -       -      +
    229D  ARG*     4.3     1.3    -      -       -      -
    231D  ARG*     1.3    74.8    -      -       -      +
    233D  ALA*     1.3    62.6    +      -       -      +
    235D  THR*     3.2     2.8    +      -       -      -
    236D  GLY      3.0    22.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 233 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185D  THR*     4.2     6.0    -      -       +      +
    187D  VAL*     4.0    21.2    -      -       +      +
    229D  ARG      5.0     0.8    +      -       -      +
    231D  ARG*     3.2     0.8    -      -       -      +
    232D  VAL*     1.3    83.1    -      -       -      +
    234D  LEU*     1.3    57.1    +      -       -      +
    236D  GLY*     3.5     0.9    +      -       -      -
    237D  LEU*     2.9    28.1    +      -       -      +
    255D  ILE*     5.2     9.4    -      -       +      +
    258D  ILE*     4.7     8.7    -      -       +      -
    261D  PHE*     4.8    11.2    -      -       +      -
    292D  LEU*     3.8    30.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 234 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117D  ILE*     3.7    21.5    -      -       +      +
    118D  HIS*     3.5    31.4    -      -       +      +
    230D  ALA      4.3     5.6    -      -       -      +
    231D  ARG*     2.9    30.9    +      -       -      +
    233D  ALA*     1.3    76.5    -      -       -      +
    235D  THR*     1.3    59.2    +      -       -      +
    237D  LEU*     3.3    26.4    +      -       +      +
    238D  THR*     2.9    33.4    +      -       -      -
    261D  PHE*     4.9     9.0    -      -       +      -
    291D  LEU      5.0     4.3    -      -       -      +
    292D  LEU*     3.7    19.7    -      -       +      -
    295D  ARG*     4.3     5.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 235 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85D  VAL*     3.8    22.6    -      -       +      +
     96D  ILE*     5.2     2.2    -      -       +      -
     97D  ASN      4.0     9.9    -      -       -      +
     98D  VAL*     3.2    32.0    +      -       -      +
    117D  ILE*     3.8    12.9    -      -       -      +
    218D  VAL*     3.7    25.8    -      -       +      -
    231D  ARG      3.1     3.9    +      -       -      -
    232D  VAL*     3.2    11.6    +      -       -      -
    234D  LEU*     1.3    76.1    -      -       -      +
    236D  GLY*     1.3    62.9    +      -       -      +
    238D  THR*     3.1    13.0    +      -       -      -
    239D  ILE*     3.1    18.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 236 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183D  VAL*     4.2    10.0    -      -       -      +
    185D  THR*     3.6    26.0    -      -       -      -
    218D  VAL*     4.4     6.5    -      -       -      +
    232D  VAL      3.0    12.6    +      -       -      -
    233D  ALA      3.8     2.7    -      -       -      -
    235D  THR*     1.3    77.5    -      -       -      +
    237D  LEU*     1.3    60.4    +      -       -      +
    239D  ILE*     3.5     3.5    +      -       -      +
    240D  ALA*     3.0    24.0    +      -       -      +
    253D  LEU*     4.4     5.0    -      -       -      +
    255D  ILE*     6.0     0.9    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 237 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    233D  ALA      2.9    19.2    +      -       -      +
    234D  LEU*     3.3    24.5    -      -       +      +
    236D  GLY*     1.3    77.0    -      -       -      +
    238D  THR*     1.3    57.9    +      -       -      +
    240D  ALA*     3.3     6.5    +      -       +      +
    241D  GLU*     2.9    35.1    +      -       +      +
    253D  LEU*     5.3     4.5    -      -       -      +
    255D  ILE*     5.8     0.8    -      -       -      +
    291D  LEU      4.8     0.7    -      -       -      +
    292D  LEU*     4.2    10.5    -      -       +      +
    295D  ARG*     3.4    69.1    -      -       +      +
    296D  ILE*     3.6    22.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 238 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85D  VAL*     3.9    11.7    -      -       +      -
     87D  VAL*     4.5     1.3    -      -       +      -
    115D  LYS*     3.7    31.3    -      -       +      +
    116D  PRO      3.4    18.2    +      -       -      +
    117D  ILE*     3.3    24.8    -      -       -      -
    234D  LEU      2.9    16.8    +      -       -      -
    235D  THR      3.1     4.9    +      -       -      -
    237D  LEU*     1.3    74.6    -      -       -      +
    239D  ILE*     1.3    61.9    +      -       -      +
    241D  GLU*     3.2    10.3    +      -       -      +
    242D  TYR*     2.9    27.7    +      -       -      +
    295D  ARG*     4.2     6.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 239 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     85D  VAL*     5.1     6.5    -      -       +      -
     86D  PRO      4.2    17.7    -      -       -      +
     87D  VAL*     4.6    11.9    -      -       +      -
     91D  THR*     4.7     7.4    -      -       -      +
     96D  ILE*     4.0    20.6    -      -       +      -
    183D  VAL*     3.8    22.0    -      -       +      -
    216D  ALA*     4.5     9.9    -      -       +      -
    218D  VAL*     3.8    28.7    -      -       +      -
    235D  THR*     3.1    13.7    +      -       +      +
    236D  GLY*     3.9     7.4    -      -       -      +
    237D  LEU      3.4     0.2    -      -       -      -
    238D  THR*     1.3    73.8    -      -       -      +
    240D  ALA*     1.3    63.9    +      -       -      +
    242D  TYR*     3.3     2.6    +      -       -      +
    243D  PHE*     3.1    40.4    +      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 240 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183D  VAL*     4.6     5.8    -      -       +      +
    236D  GLY      3.0    17.9    +      -       -      +
    237D  LEU*     3.6     7.9    -      -       +      +
    238D  THR      3.2     0.2    -      -       -      -
    239D  ILE*     1.3    77.5    -      -       -      +
    241D  GLU*     1.3    56.9    +      -       +      +
    243D  PHE*     3.4     3.3    +      -       -      +
    244D  ARG*     2.9    27.8    +      -       -      +
    251D  VAL*     4.2    22.2    -      -       +      +
    253D  LEU*     4.2    28.5    -      -       +      -
    296D  ILE*     6.1     0.2    -      -       +      -
    304D  VAL*     5.0     6.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 241 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115D  LYS*     5.3     9.4    -      -       -      -
    119D  ALA*     4.4     8.1    -      -       -      +
    120D  ASP      5.0     3.4    -      -       -      +
    122D  PRO*     5.3     1.3    -      -       -      +
    237D  LEU*     2.9    28.6    +      -       +      +
    238D  THR*     3.2     8.4    +      -       +      +
    240D  ALA*     1.3    76.9    -      -       -      +
    242D  TYR*     1.3    57.9    +      -       -      +
    244D  ARG*     3.3    31.2    +      -       -      +
    245D  ASP*     2.9    37.3    +      -       -      +
    295D  ARG*     3.0    55.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 242 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     87D  VAL*     3.6    26.0    -      -       +      -
     88D  GLY*     3.4    38.0    -      -       -      -
    112D  LYS*     6.1     1.0    -      -       -      -
    113D  LEU*     3.3    34.1    -      -       +      +
    115D  LYS*     3.8    17.9    -      -       +      +
    238D  THR      2.9    15.3    +      -       -      +
    239D  ILE      3.9     3.1    -      -       -      +
    241D  GLU*     1.3    77.6    -      -       -      +
    243D  PHE*     1.3    70.2    +      +       +      +
    245D  ASP*     5.5     0.2    -      -       -      -
    246D  GLU*     3.4    55.8    +      -       +      +
    247D  GLU*     4.0     8.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 243 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88D  GLY*     3.3    42.0    -      -       -      -
     89D  ARG*     4.3     8.3    -      -       +      -
     91D  THR*     4.2     5.2    -      -       -      -
     92D  LEU*     3.7    31.4    -      -       +      -
    181D  PHE*     3.6    33.4    -      +       +      -
    182D  SER      5.5     0.2    -      -       -      -
    183D  VAL*     4.7    13.5    -      -       +      -
    216D  ALA*     5.0     1.3    -      -       +      -
    239D  ILE*     3.1    32.1    +      -       +      +
    240D  ALA      4.0     1.6    -      -       -      +
    242D  TYR*     1.3    83.5    -      +       +      +
    244D  ARG*     1.3    63.0    +      -       -      +
    247D  GLU*     3.3    28.7    -      -       +      +
    248D  GLY      4.1     1.6    +      -       -      -
    249D  GLN*     4.3     5.3    +      -       -      +
    251D  VAL*     3.6    24.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 244 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122D  PRO*     4.0    13.7    -      -       -      +
    240D  ALA      2.9    17.8    +      -       -      +
    241D  GLU*     3.2    38.2    +      -       -      +
    243D  PHE*     1.3    77.2    -      -       -      +
    245D  ASP*     1.3    82.8    +      -       -      +
    248D  GLY*     3.2    18.4    +      -       -      -
    249D  GLN      4.3     2.4    +      -       -      -
    251D  VAL*     3.9     6.0    -      -       -      +
    295D  ARG      3.5    18.2    +      -       -      -
    297D  THR*     2.4    40.0    +      -       -      +
    299D  THR*     3.6    26.6    -      -       -      +
    301D  LYS      3.5     8.5    -      -       -      +
    302D  GLY*     4.0    21.0    -      -       -      -
    304D  VAL*     3.6    25.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 245 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241D  GLU*     2.9    23.4    +      -       -      +
    242D  TYR*     5.5     0.2    -      -       -      -
    244D  ARG*     1.3    99.5    +      -       -      +
    246D  GLU*     1.3    69.8    +      -       +      +
    247D  GLU      3.0     6.9    +      -       -      -
    248D  GLY*     3.8     4.2    +      -       -      -
    299D  THR*     3.9     5.5    +      -       -      +
    301D  LYS*     3.7    41.9    -      -       +      +
----------------------------------------------------------
 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