Contacts of the helix formed by residues 250 - 273 (chain B) in PDB entry 2Y0N


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 ASN 250 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  PHE*     3.4     8.1    -      -       -      -
    247B  ALA*     3.6    17.5    +      -       -      +
    248B  GLU      3.4     3.6    +      -       -      -
    249B  LYS*     1.3    73.3    -      -       -      +
    251B  VAL*     1.3    60.8    +      -       -      +
    252B  ASP*     3.4    17.2    +      -       -      +
    253B  LEU*     3.2    21.2    +      -       +      +
    254B  CYS*     3.0    23.4    +      -       -      +
    483B  HIS*     4.0     0.9    +      -       -      -
    553G  VAL      3.8     5.7    +      -       -      -
    554G  THR*     3.5    41.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 251 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214B  VAL*     5.0     5.8    -      -       +      +
    217B  PHE*     3.6    16.2    -      -       +      -
    218B  ALA*     4.0    31.0    -      -       +      +
    221B  ALA*     5.8     2.7    -      -       +      -
    249B  LYS      3.2     7.8    +      -       -      +
    250B  ASN*     1.3    74.4    +      -       -      +
    252B  ASP*     1.3    70.9    +      -       -      +
    254B  CYS*     3.3     3.1    -      -       -      +
    255B  LYS*     3.1    40.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 252 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250B  ASN*     3.3    10.3    +      -       -      +
    251B  VAL*     1.3    83.2    -      -       -      +
    253B  LEU*     1.3    65.7    +      -       -      +
    255B  LYS*     3.3    21.2    +      -       -      +
    256B  GLU*     3.3    25.4    +      -       -      +
    554G  THR*     4.9     8.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 253 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    247B  ALA*     3.6    35.4    -      -       +      -
    250B  ASN*     3.2    20.5    +      -       +      +
    252B  ASP*     1.3    76.1    -      -       -      +
    254B  CYS*     1.3    65.0    +      -       -      +
    256B  GLU*     3.4     8.5    +      -       -      +
    257B  MET*     3.3    17.5    +      -       -      +
    479B  ALA*     4.5     5.2    -      -       +      -
    483B  HIS*     3.7    15.7    +      -       +      +
    553G  VAL*     4.0    11.7    -      -       +      +
    554G  THR*     3.5    28.9    +      -       -      +
    555G  SER*     3.6     7.2    -      -       -      +
    556G  PHE*     3.5    40.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 254 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213B  TYR*     3.4    35.9    -      -       -      -
    214B  VAL*     4.5     9.2    -      -       -      -
    217B  PHE*     3.5    41.7    -      -       +      -
    250B  ASN      3.0     5.5    +      -       -      -
    251B  VAL      3.3    10.8    -      -       -      +
    253B  LEU*     1.3    75.8    -      -       -      +
    255B  LYS*     1.3    63.8    +      -       -      +
    257B  MET*     2.9    15.3    +      -       -      +
    258B  VAL*     3.1    21.3    +      -       -      +
    483B  HIS*     3.8    12.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 255 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214B  VAL*     4.1    27.6    -      -       +      -
    251B  VAL*     3.1    27.7    +      -       -      +
    252B  ASP*     3.3    22.2    +      -       -      +
    254B  CYS*     1.3    79.4    -      -       -      +
    256B  GLU*     1.3    62.6    +      -       -      +
    258B  VAL*     3.4     9.2    +      -       -      +
    259B  ASP*     3.1    24.4    +      -       -      +
    441D  PHE*     3.7    18.3    -      -       +      +
    442D  ASP*     3.5    34.7    +      -       -      +
    443D  GLN*     3.8    20.1    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 256 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    252B  ASP*     3.3    13.7    +      -       -      +
    253B  LEU*     3.6    11.0    -      -       -      +
    254B  CYS      3.2     0.6    -      -       -      -
    255B  LYS*     1.3    73.6    -      -       -      +
    257B  MET*     1.3    68.0    +      -       -      +
    259B  ASP*     3.3     6.4    +      -       -      +
    260B  GLY*     2.8    21.5    +      -       -      -
    443D  GLN*     5.3     5.6    -      -       -      +
    577F  PHE*     4.5     4.6    +      -       -      -
    554G  THR      4.2     1.9    -      -       -      +
    555G  SER*     2.7    28.9    +      -       -      -
    556G  PHE*     3.0    36.8    +      -       +      -
    557G  PHE*     3.5    32.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 257 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213B  TYR*     4.2    16.6    -      -       +      -
    253B  LEU      3.3     8.4    +      -       -      +
    254B  CYS*     2.9     9.8    +      -       -      +
    256B  GLU*     1.3    78.3    -      -       -      +
    258B  VAL*     1.3    82.6    +      -       +      +
    260B  GLY      3.1     2.3    +      -       -      -
    261B  LEU*     2.8    48.3    +      -       +      +
    480B  LEU*     4.4     6.7    -      -       +      -
    483B  HIS*     3.4    40.8    -      -       +      +
    484B  PHE*     3.5    34.1    -      -       +      -
    487B  PHE*     4.5     9.6    -      -       +      -
    577F  PHE*     3.2    17.4    -      -       +      -
    556G  PHE*     4.3     3.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 258 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210B  LEU*     3.2    52.6    -      -       +      +
    213B  TYR*     4.3     5.4    -      -       +      -
    214B  VAL*     3.7    22.4    -      -       +      -
    254B  CYS*     3.1    21.7    +      -       -      +
    255B  LYS*     3.8     5.6    -      -       -      +
    257B  MET*     1.3    95.2    -      -       +      +
    259B  ASP*     1.3    61.9    +      -       -      +
    261B  LEU*     3.2     7.4    +      -       -      +
    262B  ARG*     3.1    18.4    +      -       -      +
    441D  PHE*     4.0    14.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 259 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    255B  LYS      3.1    17.3    +      -       -      +
    256B  GLU*     3.7     4.9    -      -       -      +
    258B  VAL*     1.3    75.1    -      -       -      +
    260B  GLY*     1.3    65.5    +      -       -      +
    262B  ARG*     2.3    41.4    +      -       -      +
    263B  ILE*     3.1    35.9    +      -       -      +
    441D  PHE*     4.6    11.0    -      -       +      -
    443D  GLN*     3.8    27.8    -      -       -      +
    557G  PHE*     6.1     1.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 260 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    256B  GLU      2.8    12.9    +      -       -      -
    257B  MET      3.4     4.3    -      -       -      -
    259B  ASP*     1.3    75.2    -      -       -      +
    261B  LEU*     1.3    48.7    -      -       -      +
    263B  ILE*     3.3     4.7    +      -       -      +
    264B  THR*     2.6    40.5    +      -       -      -
    576F  ALA*     3.9    13.4    -      -       -      +
    577F  PHE*     3.4    26.9    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 261 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  ILE*     6.1     0.2    -      -       -      -
    210B  LEU*     4.4    18.6    -      -       +      -
    257B  MET*     2.8    51.4    +      -       +      +
    258B  VAL*     3.3    10.3    -      -       -      +
    259B  ASP      3.2     0.2    -      -       -      -
    260B  GLY*     1.3    74.9    -      -       -      +
    262B  ARG*     1.3    57.5    +      -       -      +
    264B  THR*     3.7     2.8    -      -       -      -
    265B  PHE*     2.8    32.4    +      -       -      +
    456B  LEU*     4.3     7.8    -      -       +      +
    459B  LEU*     3.9    23.6    -      -       +      +
    460B  PHE*     3.6    35.7    -      -       +      -
    463B  LEU*     4.8     5.6    -      -       +      -
    484B  PHE*     4.4    10.8    -      -       +      -
    487B  PHE*     4.6     4.0    -      -       +      -
    577F  PHE*     3.5     4.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 262 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  ILE*     5.1     1.8    -      -       +      -
    207B  ILE*     3.8    22.9    -      -       +      +
    210B  LEU*     3.8    21.5    -      -       +      -
    258B  VAL      3.1     5.3    +      -       -      +
    259B  ASP*     2.3    43.2    +      -       -      +
    261B  LEU*     1.3    77.3    -      -       -      +
    263B  ILE*     1.3    80.1    +      -       -      +
    265B  PHE*     4.4     2.9    -      -       -      -
    266B  ASP*     2.9    50.1    +      -       -      +
    448B  SER*     3.2    14.4    +      -       -      +
    449B  TYR*     5.7     3.0    -      -       -      -
    440D  GLU*     4.8    12.0    +      -       -      -
    441D  PHE*     4.3    13.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 263 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    259B  ASP*     3.1    36.9    +      -       -      +
    260B  GLY*     3.7     7.2    -      -       -      +
    262B  ARG*     1.3    94.5    -      -       -      +
    264B  THR*     1.3    66.7    +      -       -      +
    266B  ASP*     3.3     8.6    +      -       +      +
    267B  TYR*     3.2    20.8    +      -       -      +
    574F  VAL*     3.9    27.8    -      -       +      -
    575F  VAL      3.7    22.4    -      -       -      +
    576F  ALA*     4.5     3.4    -      -       +      -
    581F  LEU*     4.0     9.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 264 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260B  GLY      2.6    29.3    +      -       -      -
    261B  LEU*     3.8     5.8    -      -       -      -
    263B  ILE*     1.3    74.8    -      -       -      +
    265B  PHE*     1.3    53.6    +      -       -      +
    267B  TYR*     3.3     2.3    +      -       +      +
    268B  THR*     2.4    45.1    +      -       -      +
    459B  LEU*     4.3    15.9    -      -       +      -
    463B  LEU*     4.7     7.2    -      -       +      -
    466B  ILE*     4.7    15.0    -      -       +      -
    470B  MET*     5.3     1.6    -      -       +      -
    576F  ALA*     3.5     7.6    -      -       -      +
    577F  PHE*     3.2    21.9    -      -       +      -
    581F  LEU*     4.3    20.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 265 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  ILE*     3.3    37.0    -      -       +      -
    261B  LEU      2.8    21.4    +      -       -      +
    262B  ARG*     4.0     4.7    -      -       -      +
    264B  THR*     1.3    71.7    -      -       -      +
    266B  ASP*     1.3    68.3    +      -       -      +
    268B  THR*     3.0     3.4    +      -       -      -
    269B  LEU*     2.9    55.6    +      -       +      +
    273B  LEU*     3.9    14.6    -      -       +      -
    447B  PRO*     3.6    31.9    -      -       +      -
    448B  SER*     4.0    12.1    -      -       -      -
    451B  TYR*     3.7     9.4    -      -       +      -
    455B  HIS*     3.7    22.2    -      -       +      -
    456B  LEU*     4.3    11.0    -      -       +      -
    459B  LEU*     4.2    13.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 266 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262B  ARG*     2.9    32.6    +      -       -      +
    263B  ILE*     3.5     7.7    -      -       -      +
    265B  PHE*     1.3    78.5    -      -       -      +
    267B  TYR*     1.3    60.8    +      -       -      +
    270B  PRO*     3.8     6.9    -      -       -      +
    446B  PRO*     3.3    16.0    -      -       +      +
    447B  PRO*     3.1    33.6    -      -       +      +
    448B  SER*     2.8    40.9    +      -       -      -
    449B  TYR*     6.1     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 267 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    263B  ILE      3.2     4.4    +      -       -      +
    264B  THR      3.8     5.2    -      -       -      +
    265B  PHE      3.1     0.4    -      -       -      -
    266B  ASP*     1.3    78.4    -      -       -      +
    268B  THR*     1.3    71.3    +      -       -      +
    270B  PRO*     3.5    10.7    -      -       -      +
    271B  LEU*     3.6    32.0    -      -       +      +
    466B  ILE*     6.5     0.2    -      -       +      -
    567E  LEU*     4.3    13.6    -      -       +      +
    581F  LEU*     3.7    32.1    -      -       +      -
    582F  PRO*     3.3    27.9    +      -       +      -
    583F  LYS*     4.1     2.6    -      -       -      -
    584F  LEU*     3.7    28.3    +      -       +      -
    572H  LEU*     3.6    37.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 268 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264B  THR*     2.4    37.5    +      -       -      +
    265B  PHE      3.8     1.8    -      -       -      -
    267B  TYR*     1.3    83.1    -      -       -      +
    269B  LEU*     1.3    66.9    +      -       -      +
    271B  LEU*     2.8    17.7    +      -       -      -
    272B  VAL*     2.9    48.4    +      -       +      -
    273B  LEU*     3.7    14.8    -      -       +      -
    459B  LEU*     3.9    15.6    -      -       +      +
    466B  ILE*     4.1    13.0    -      -       +      +
    584F  LEU*     4.3     6.0    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 269 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265B  PHE*     2.9    47.1    +      -       +      +
    268B  THR*     1.3    76.5    -      -       -      +
    270B  PRO*     1.3    62.8    -      -       +      +
    271B  LEU      3.0     5.7    +      -       -      -
    273B  LEU*     3.2    32.1    +      -       +      +
    274B  LEU*     3.7    15.7    +      -       +      +
    282B  TYR*     3.9    22.9    -      -       +      -
    447B  PRO*     3.9    12.6    -      -       +      -
    451B  TYR*     3.5    34.1    -      -       +      +
    455B  HIS*     4.0    26.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 270 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    266B  ASP      3.8    11.4    -      -       -      +
    267B  TYR      3.5    11.9    -      -       -      +
    268B  THR      3.5     3.6    -      -       -      -
    269B  LEU*     1.3    99.2    -      -       +      +
    271B  LEU*     1.3    67.4    +      -       +      +
    274B  LEU*     4.5    14.6    -      -       +      +
    279B  GLN*     5.0     6.6    +      -       -      +
    282B  TYR*     3.3    44.8    -      -       +      +
    447B  PRO*     4.5     2.0    -      -       +      -
    586F  PRO*     5.9     0.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 271 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    267B  TYR*     3.6    50.5    -      -       +      +
    268B  THR*     2.8     8.5    +      -       -      +
    270B  PRO*     1.3    88.8    -      -       +      +
    272B  VAL*     1.3    63.5    +      -       +      +
    273B  LEU      3.8     0.2    -      -       -      -
    274B  LEU*     5.3     1.5    +      -       -      -
    584F  LEU*     3.8    24.0    -      -       +      +
    586F  PRO*     3.4    33.3    -      -       +      +
    587F  GLN      3.0    27.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 272 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268B  THR*     2.9    41.8    +      -       +      -
    271B  LEU*     1.3    81.7    -      -       +      +
    273B  LEU*     1.3    59.7    +      -       +      +
    274B  LEU      3.7     1.6    -      -       -      -
    462B  LYS*     3.5    44.2    -      -       +      +
    466B  ILE*     4.9     0.7    -      -       +      -
    584F  LEU*     4.2    19.5    -      -       +      -
    585F  ALA      4.9     4.5    -      -       -      +
    587F  GLN*     3.6    27.1    -      -       +      +
    589F  PHE*     3.6    20.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 273 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265B  PHE*     3.9    20.4    -      -       +      -
    268B  THR*     3.7    19.3    -      -       +      -
    269B  LEU*     3.2    32.9    +      -       +      +
    272B  VAL*     1.3    80.9    -      -       +      +
    274B  LEU*     1.3    62.8    +      -       -      +
    455B  HIS*     4.3     3.6    -      -       +      +
    458B  ARG*     3.2    36.7    +      -       +      +
    459B  LEU*     3.7    44.6    -      -       +      +
    462B  LYS*     3.7    27.8    -      -       +      -
    589F  PHE*     3.8    11.0    -      -       +      +
----------------------------------------------------------
 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