Contacts of the helix formed by residues 247 - 272 (chain C) in PDB entry 1UU1


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 HIS 247 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36C  ASP*     5.7     0.9    -      -       -      -
     37C  LEU*     3.6    30.4    -      -       +      +
     40C  GLU*     2.9    39.9    +      -       -      -
    243C  VAL      2.8    15.7    +      -       -      +
    244C  ALA      3.4     4.3    -      -       -      -
    245C  LEU      3.2     0.2    -      -       -      -
    246C  ASP*     1.3    93.5    -      -       +      +
    248C  ARG*     1.3    62.7    +      -       -      +
    249C  GLU*     3.2    15.5    +      -       -      -
    250C  ILE*     3.3    30.0    +      -       +      +
    251C  PHE*     3.1    15.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 248 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64C  LYS*     3.8    14.1    +      -       -      +
     67C  SER*     3.8    24.7    +      -       -      -
     68C  TYR*     3.7    41.0    +      -       +      +
    204C  PHE*     4.9     8.5    -      -       +      -
    244C  ALA      3.4     7.7    +      -       -      +
    245C  LEU*     2.9    41.1    +      -       +      +
    246C  ASP      3.6     1.5    +      -       -      +
    247C  HIS*     1.3    75.0    -      -       -      +
    249C  GLU*     1.3    71.0    +      -       +      +
    250C  ILE      3.2     0.2    -      -       -      -
    251C  PHE*     3.2    10.2    +      -       -      +
    252C  GLU*     2.9    41.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 249 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246C  ASP      4.1     4.4    -      -       -      +
    247C  HIS*     3.4    23.6    -      -       -      +
    248C  ARG*     1.3    80.0    -      -       +      +
    250C  ILE*     1.3   100.1    +      -       -      +
    252C  GLU*     3.1    17.4    +      -       -      +
    253C  GLU*     2.9    38.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 250 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34C  PRO*     4.1    25.8    -      -       +      -
     36C  ASP*     5.8     3.1    -      -       -      +
     37C  LEU*     5.1     4.9    -      -       +      -
    247C  HIS*     3.5    32.8    -      -       +      +
    248C  ARG      3.2     0.2    -      -       -      -
    249C  GLU*     1.3   101.5    +      -       -      +
    251C  PHE*     1.3    67.5    +      -       +      +
    253C  GLU*     3.2    15.8    +      -       -      +
    254C  ARG*     3.2    33.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 251 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     33C  PHE*     3.7    16.8    -      +       -      -
     34C  PRO*     3.9    16.4    -      -       +      -
     37C  LEU*     3.6    26.2    -      -       +      -
    203C  ALA*     3.5    14.4    -      -       +      +
    204C  PHE*     3.5    52.9    -      +       +      -
    244C  ALA*     3.2    32.3    -      -       +      -
    247C  HIS      3.1    24.7    -      -       -      -
    248C  ARG*     3.2     7.4    +      -       -      +
    250C  ILE*     1.3    74.9    -      -       +      +
    252C  GLU*     1.3    61.8    +      -       +      +
    254C  ARG*     3.6    20.5    -      -       -      +
    255C  THR*     2.8    33.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 252 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68C  TYR*     5.8     3.2    -      -       +      -
    248C  ARG*     2.9    38.1    +      -       +      +
    249C  GLU*     3.2    18.5    -      -       -      +
    251C  PHE*     1.3    76.6    -      -       +      +
    253C  GLU*     1.3    66.6    +      -       +      +
    255C  THR*     3.2     8.4    +      -       -      -
    256C  LYS*     2.9    23.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 253 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249C  GLU*     2.9    22.6    +      -       +      +
    250C  ILE*     3.2    16.1    +      -       -      +
    252C  GLU*     1.3    77.4    -      -       +      +
    254C  ARG*     1.3    62.0    +      -       +      +
    256C  LYS*     3.1    14.4    +      -       +      +
    257C  PHE*     3.0    21.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 254 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  ASN*     4.7     6.3    -      -       -      +
     31C  PHE*     3.1    45.5    -      -       +      +
     32C  PRO*     2.7    34.1    +      -       -      +
     34C  PRO*     3.9    27.1    -      -       -      +
    203C  ALA      5.7     0.9    -      -       -      +
    205C  SER*     3.4    17.0    +      -       -      -
    250C  ILE*     3.2    22.4    +      -       +      +
    251C  PHE*     3.6    20.5    -      -       -      +
    252C  GLU      3.2     0.2    -      -       -      -
    253C  GLU*     1.3    78.5    -      -       +      +
    255C  THR*     1.3    62.3    +      -       -      +
    257C  PHE*     3.1     8.5    +      -       -      +
    258C  ILE*     2.9    32.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 255 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  ASN*     5.8     0.5    +      -       -      +
    178C  GLU*     3.2    30.4    -      -       +      +
    179C  PHE*     3.5    24.7    -      -       +      -
    203C  ALA*     4.2    14.0    +      -       -      +
    251C  PHE      2.8    21.8    +      -       -      -
    252C  GLU*     3.5     7.9    -      -       -      -
    254C  ARG*     1.3    75.8    -      -       -      +
    256C  LYS*     1.3    53.5    +      -       -      +
    258C  ILE*     3.2    11.0    +      -       -      +
    259C  VAL*     2.7    46.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 256 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252C  GLU      2.9    12.9    +      -       -      +
    253C  GLU*     3.1    17.9    +      -       +      +
    255C  THR*     1.3    75.1    -      -       -      +
    257C  PHE*     1.3    59.8    +      -       -      +
    259C  VAL*     3.9     4.9    -      -       -      +
    260C  GLU*     2.6    71.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 257 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     31C  PHE*     3.7    35.2    -      +       +      -
    253C  GLU      3.0    11.8    +      -       -      +
    254C  ARG*     3.1     9.4    +      -       -      +
    256C  LYS*     1.3    76.8    -      -       -      +
    258C  ILE*     1.3    65.3    +      -       +      +
    260C  GLU*     4.1     7.3    -      -       -      +
    261C  GLU*     2.9    48.6    +      -       +      +
    319C  GLY      3.8    18.4    -      -       -      -
    321C  ARG*     3.7    50.9    -      -       +      -
    324C  ASN*     4.5     3.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 258 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29C  ASN*     3.6    28.5    -      -       -      +
     30C  PRO*     3.7    22.7    -      -       +      -
     31C  PHE*     4.6     2.5    -      -       +      -
    179C  PHE*     4.1    16.2    -      -       +      -
    254C  ARG*     2.9    24.3    +      -       +      +
    255C  THR*     3.5     6.5    -      -       -      +
    257C  PHE*     1.3    87.1    -      -       +      +
    259C  VAL*     1.3    61.0    +      -       -      +
    261C  GLU*     3.4     4.5    +      -       -      +
    262C  ARG*     2.8    27.4    +      -       -      +
    281C  GLY      5.5     0.7    -      -       -      +
    282C  ASN*     3.9    24.5    -      -       +      +
    318C  ILE*     3.7    27.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 259 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178C  GLU      5.0     0.2    -      -       -      +
    179C  PHE*     3.9    25.1    -      -       +      +
    255C  THR*     2.7    43.2    +      -       +      +
    256C  LYS*     3.9     7.0    -      -       -      +
    258C  ILE*     1.3    70.3    -      -       -      +
    260C  GLU*     1.3    71.9    +      -       +      +
    262C  ARG*     2.8    42.7    +      -       -      +
    263C  GLU*     2.9    18.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 260 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256C  LYS*     2.6    55.9    +      -       +      +
    257C  PHE*     4.1     5.9    -      -       -      +
    259C  VAL*     1.3    80.2    -      -       +      +
    261C  GLU*     1.3    58.5    +      -       -      +
    263C  GLU*     3.2     7.6    +      -       -      +
    264C  ARG*     2.8    31.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 261 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257C  PHE*     2.9    38.7    +      -       +      +
    258C  ILE*     3.6     4.7    -      -       -      +
    259C  VAL      3.1     0.2    -      -       -      -
    260C  GLU*     1.3    79.3    -      -       -      +
    262C  ARG*     1.3    56.8    +      -       -      +
    264C  ARG*     3.1    35.6    +      -       -      +
    265C  MET*     2.9    33.5    +      -       -      +
    318C  ILE*     4.0     7.9    -      -       +      -
    321C  ARG*     3.7    21.8    -      -       -      +
    324C  ASN*     2.7    41.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 262 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179C  PHE*     3.2    24.5    +      -       -      +
    258C  ILE*     2.8    18.9    +      -       +      +
    259C  VAL*     2.8    26.8    +      -       -      +
    261C  GLU*     1.3    78.1    -      -       -      +
    263C  GLU*     1.3    87.2    +      -       -      +
    265C  MET*     3.6     1.8    +      -       -      +
    266C  LYS*     3.0    36.3    +      -       +      +
    279C  SER*     3.1    22.8    +      -       -      -
    280C  ARG*     3.3    18.0    -      -       -      +
    281C  GLY      2.7    38.1    +      -       -      +
    283C  PHE      3.6    20.4    -      -       -      +
    284C  VAL*     3.9     9.4    -      -       +      +
    318C  ILE*     3.7    21.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 263 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259C  VAL*     2.9    20.5    +      -       +      +
    260C  GLU*     3.7     9.9    -      -       -      +
    262C  ARG*     1.3   109.5    +      -       -      +
    264C  ARG*     1.3    63.9    +      -       -      +
    266C  LYS*     3.2    27.4    +      -       -      +
    267C  SER*     2.8    30.3    +      -       -      -
    270C  ARG*     5.5     0.3    +      -       -      -
    279C  SER      3.9     0.2    -      -       -      +
    280C  ARG*     4.8     3.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 264 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260C  GLU      2.8    17.8    +      -       -      +
    261C  GLU*     3.3    35.0    +      -       -      +
    263C  GLU*     1.3    75.8    -      -       -      +
    265C  MET*     1.3    66.3    +      -       -      +
    267C  SER*     3.2     7.8    +      -       -      -
    268C  ALA*     3.1    21.3    +      -       +      +
    321C  ARG*     6.0     1.8    -      -       -      -
    324C  ASN*     4.4     5.7    -      -       -      +
    325C  ASP*     3.2    33.8    +      -       -      -
    328C  LEU*     4.2    22.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 265 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261C  GLU      2.9    16.0    +      -       -      +
    262C  ARG      4.0     3.4    -      -       -      +
    264C  ARG*     1.3    80.1    -      -       -      +
    266C  LYS*     1.3    64.7    +      -       -      +
    268C  ALA*     2.9     2.4    +      -       -      +
    269C  LEU*     2.8    33.4    +      -       +      +
    284C  VAL*     4.4    18.8    -      -       +      -
    316C  ILE*     4.7     6.5    -      -       +      -
    317C  THR      5.7     0.9    -      -       -      +
    318C  ILE*     3.3    31.0    -      -       +      -
    324C  ASN*     3.7    30.3    -      -       +      +
    327C  ILE*     3.8    35.2    -      -       +      -
    328C  LEU*     4.0    28.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 266 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262C  ARG*     3.0    24.0    +      -       +      +
    263C  GLU*     3.2    36.8    +      -       -      +
    264C  ARG      3.3     0.2    -      -       -      -
    265C  MET*     1.3    76.8    -      -       -      +
    267C  SER*     1.3    61.2    +      -       -      +
    269C  LEU*     3.7     2.6    +      -       -      -
    270C  ARG*     3.2    42.3    +      -       -      +
    276C  ILE*     3.4    28.5    -      -       +      +
    277C  THR      3.7     9.0    -      -       -      +
    278C  ASP*     3.0    26.9    +      -       -      +
    279C  SER*     2.9    38.4    +      -       -      +
    280C  ARG*     4.7     0.2    -      -       -      +
    284C  VAL*     3.6    15.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 267 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263C  GLU*     2.8    19.5    +      -       -      -
    264C  ARG*     3.5     9.2    -      -       -      -
    265C  MET      3.1     0.6    -      -       -      -
    266C  LYS*     1.3    73.4    -      -       -      +
    268C  ALA*     1.3    66.7    +      -       -      +
    270C  ARG*     3.3     9.5    +      -       -      +
    271C  GLU*     2.8    38.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 268 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264C  ARG*     3.1     7.6    +      -       +      +
    265C  MET      2.9     7.5    +      -       -      +
    267C  SER*     1.3    79.0    -      -       -      +
    269C  LEU*     1.3    62.9    +      -       -      +
    271C  GLU*     3.1    17.4    +      -       -      +
    272C  MET*     3.1    32.5    +      -       +      +
    328C  LEU*     3.7    29.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 269 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265C  MET*     2.8    33.7    +      -       +      +
    266C  LYS*     4.0     6.1    -      -       -      +
    268C  ALA*     1.3    68.5    -      -       -      +
    270C  ARG*     1.3    65.4    +      -       -      +
    272C  MET*     3.1    10.9    +      -       -      -
    273C  GLY      3.2     0.3    +      -       -      -
    274C  TYR*     3.0    42.4    +      -       +      -
    276C  ILE*     4.2    15.5    -      -       +      -
    284C  VAL*     4.3    24.5    -      -       +      -
    286C  VAL*     4.6    11.0    -      -       +      -
    316C  ILE*     5.8     0.2    -      -       +      -
    328C  LEU*     3.6    20.4    -      -       +      -
    331C  LEU*     3.3    36.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 270 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263C  GLU*     5.5     0.6    +      -       -      -
    266C  LYS*     3.2    41.1    +      -       -      +
    267C  SER*     3.6     8.0    -      -       -      +
    269C  LEU*     1.3    76.8    -      -       -      +
    271C  GLU*     1.3    55.2    +      -       +      +
    273C  GLY*     2.7    26.7    +      -       -      -
    274C  TYR      4.0    12.7    -      -       -      +
    276C  ILE*     3.3    41.7    +      -       +      +
    277C  THR      3.6    20.4    +      -       -      -
    278C  ASP*     3.9    16.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 271 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267C  SER*     2.8    36.4    +      -       -      +
    268C  ALA*     3.1    12.6    +      -       -      +
    270C  ARG*     1.3    76.2    -      -       +      +
    272C  MET*     1.3    59.4    +      -       +      +
    273C  GLY*     3.0     1.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 272 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268C  ALA*     3.1    27.4    +      -       +      +
    269C  LEU*     3.1    13.6    +      -       -      +
    270C  ARG      3.1     1.2    -      -       -      -
    271C  GLU*     1.3    75.9    -      -       +      +
    273C  GLY*     1.3    59.4    +      -       -      +
    274C  TYR*     3.6    16.1    +      -       +      -
    328C  LEU*     3.4    39.0    -      -       +      +
    331C  LEU      3.8     4.9    -      -       -      -
    332C  GLU*     3.4    45.5    -      -       +      +
    335C  LYS*     3.2    26.8    -      -       -      +
----------------------------------------------------------
 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