Contacts of the helix formed by residues 1165 - 1190 (chain E) in PDB entry 5B2G


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 ALA1165 (chain E).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1151E  THR*     4.0    26.0    -      -       +      +
   1159E  ASP*     4.0    16.2    +      -       +      +
   1160E  ALA*     5.2     2.7    -      -       +      +
   1164E  MET*     1.3    77.8    -      -       -      +
   1166E  SER*     1.3    69.9    +      -       -      +
   1167E  MET*     3.3     5.4    -      -       +      +
   1168E  GLY*     3.0    14.4    +      -       -      +
   1169E  LEU*     3.1    14.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER1166 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1154E  ARG*     6.3     1.1    -      -       -      -
   1165E  ALA*     1.3    78.3    -      -       -      +
   1167E  MET*     1.3    65.6    +      -       -      +
   1169E  LEU*     3.7     2.9    +      -       -      +
   1170E  GLN*     3.6    22.3    +      -       -      +
   1346E  CYS      5.5     1.5    -      -       -      +
   1347E  SER*     2.8    41.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET1167 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1147E  LYS*     6.1     4.0    -      -       -      +
   1165E  ALA*     3.3     3.4    -      -       +      +
   1166E  SER*     1.3    79.0    -      -       -      +
   1168E  GLY*     1.3    65.3    +      -       -      +
   1169E  LEU      3.0     1.6    +      -       -      -
   1170E  GLN*     3.4    37.9    +      -       -      +
   1171E  VAL*     3.8    11.8    -      -       -      +
   1273E  ASP*     6.6     0.4    -      -       +      -
   1278E  ALA*     5.8     6.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY1168 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1164E  MET*     3.4    25.3    -      -       -      +
   1165E  ALA*     3.0    18.2    +      -       -      +
   1167E  MET*     1.3    80.0    -      -       -      +
   1169E  LEU*     1.3    56.0    +      -       -      +
   1171E  VAL*     3.3    20.4    -      -       -      +
   1172E  MET*     5.3     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1169 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1164E  MET*     3.9    27.8    -      -       +      +
   1165E  ALA      3.1    12.6    +      -       -      +
   1166E  SER*     4.4     3.1    -      -       -      +
   1167E  MET      3.1     1.0    -      -       -      -
   1168E  GLY*     1.3    77.9    -      -       -      +
   1170E  GLN*     1.3    63.6    +      -       -      +
   1171E  VAL      3.2     2.7    -      -       -      -
   1172E  MET*     3.3    18.3    +      -       +      +
   1173E  GLY      3.4     6.9    +      -       -      -
   1343E  LEU*     3.4    36.6    -      -       +      +
   1346E  CYS*     5.5    14.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN1170 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1166E  SER*     3.6    13.2    +      -       -      +
   1167E  MET*     3.4    34.8    +      -       -      +
   1169E  LEU*     1.3    75.8    -      -       -      +
   1171E  VAL*     1.3    66.4    +      -       +      +
   1173E  GLY*     3.1     4.4    +      -       -      +
   1174E  ILE*     3.1    32.8    +      -       +      +
   1278E  ALA*     4.7    12.4    -      -       -      +
   1281E  MET*     4.4    29.9    -      -       -      +
   1343E  LEU      4.2    15.4    +      -       -      +
   1344E  LEU*     3.9    14.4    -      -       +      +
   1347E  SER*     4.4    16.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL1171 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1167E  MET      3.8    12.6    -      -       -      +
   1168E  GLY*     3.3    22.9    -      -       -      +
   1170E  GLN*     1.3    81.8    -      -       +      +
   1172E  MET*     1.3    67.8    +      -       +      +
   1174E  ILE*     3.3    16.3    -      -       +      +
   1175E  ALA*     3.0    30.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET1172 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1164E  MET*     4.4    20.6    -      -       +      -
   1168E  GLY      5.3     0.4    -      -       -      +
   1169E  LEU*     3.3    17.9    +      -       +      +
   1170E  GLN      3.3     0.2    -      -       -      -
   1171E  VAL*     1.3    86.2    -      -       +      +
   1173E  GLY*     1.3    58.4    +      -       -      +
   1175E  ALA*     4.3     5.4    -      -       -      -
   1176E  LEU*     3.1    61.7    +      -       +      +
   1343E  LEU*     4.6     9.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY1173 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1169E  LEU      3.4     4.9    +      -       -      -
   1170E  GLN      3.1     7.9    +      -       -      -
   1171E  VAL      3.1     0.8    -      -       -      -
   1172E  MET*     1.3    79.9    -      -       -      +
   1174E  ILE*     1.3    57.3    +      -       -      +
   1177E  ALA*     2.9    29.3    +      -       -      +
   1340E  GLY*     3.3    17.2    -      -       -      -
   1343E  LEU*     3.3    28.5    -      -       -      +
   1344E  LEU*     4.4     2.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE1174 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1170E  GLN*     3.1     8.2    +      -       +      +
   1171E  VAL*     3.3    22.2    -      -       +      +
   1173E  GLY*     1.3    73.5    -      -       -      +
   1175E  ALA*     1.3    64.5    +      -       -      +
   1177E  ALA*     3.8     6.9    -      -       -      +
   1178E  VAL*     3.0    37.7    +      -       +      +
   1261E  SER*     3.8    37.5    -      -       -      +
   1281E  MET*     5.0     8.7    -      -       +      -
   1288E  PHE*     5.1     0.7    -      -       +      -
   1344E  LEU*     3.4    30.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA1175 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1171E  VAL      3.0    19.6    +      -       -      +
   1172E  MET*     4.0     9.0    -      -       -      +
   1174E  ILE*     1.3    80.0    -      -       +      +
   1176E  LEU*     1.3    68.3    +      -       +      +
   1178E  VAL*     3.5     4.8    +      -       -      +
   1179E  LEU*     3.2    28.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1176 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1172E  MET*     3.1    51.6    +      -       +      +
   1173E  GLY      3.9     2.5    -      -       -      +
   1175E  ALA*     1.3    81.8    -      -       +      +
   1177E  ALA*     1.3    61.4    +      -       -      +
   1179E  LEU*     3.4    14.8    +      -       +      -
   1180E  GLY      3.1     3.1    +      -       -      -
   1336E  LEU*     2.8    49.8    -      -       +      +
   1339E  LEU*     3.9    31.9    -      -       +      -
   1340E  GLY*     4.3     3.4    -      -       -      +
   1343E  LEU*     5.3     4.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA1177 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1173E  GLY      2.9    19.9    +      -       -      +
   1174E  ILE*     3.8     4.0    -      -       -      +
   1175E  ALA      3.2     0.2    -      -       -      -
   1176E  LEU*     1.3    78.1    -      -       -      +
   1178E  VAL*     1.3    62.1    +      -       -      +
   1180E  GLY      3.3     0.3    +      -       -      -
   1181E  TRP*     3.1    18.7    +      -       -      +
   1288E  PHE*     3.4    45.1    -      -       +      -
   1336E  LEU      4.1     5.4    +      -       -      -
   1337E  LEU*     3.1    17.4    -      -       -      +
   1340E  GLY*     4.1     6.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL1178 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1174E  ILE*     3.0    23.8    +      -       +      +
   1175E  ALA*     3.9     5.8    -      -       -      +
   1176E  LEU      3.3     0.2    -      -       -      -
   1177E  ALA*     1.3    73.0    -      -       +      +
   1179E  LEU*     1.3    68.4    +      -       +      +
   1181E  TRP*     3.1    16.0    +      -       +      +
   1182E  LEU*     3.0    37.8    +      -       +      +
   1258E  VAL*     4.1    29.4    -      -       +      -
   1261E  SER*     5.5     5.2    -      -       -      +
   1288E  PHE*     5.3     1.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1179 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1175E  ALA*     3.2    17.5    +      -       +      +
   1176E  LEU*     3.5    22.0    -      -       +      +
   1177E  ALA      3.3     0.2    -      -       -      -
   1178E  VAL*     1.3    80.2    -      -       +      +
   1180E  GLY*     1.3    51.4    +      -       -      +
   1182E  LEU*     3.2    18.9    +      -       +      +
   1183E  ALA*     2.7    34.9    +      -       -      +
   1336E  LEU*     3.6    14.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY1180 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1176E  LEU      3.1     3.0    +      -       -      -
   1177E  ALA      3.3     4.2    +      -       -      -
   1178E  VAL      3.2     0.2    -      -       -      -
   1179E  LEU*     1.3    75.9    -      -       -      +
   1181E  TRP*     1.3    57.1    +      -       -      +
   1183E  ALA*     3.9     5.6    -      -       -      -
   1184E  VAL*     2.9    27.4    +      -       -      +
   1333E  ALA*     3.4    18.9    -      -       -      +
   1336E  LEU*     2.9    27.1    -      -       -      +
   1337E  LEU*     3.9    11.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP1181 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1177E  ALA      3.1    12.8    +      -       -      +
   1178E  VAL*     3.4    11.7    -      -       +      +
   1180E  GLY*     1.3    75.3    -      -       -      +
   1182E  LEU*     1.3    90.3    +      -       +      +
   1184E  VAL*     3.0    28.9    -      -       +      +
   1185E  MET*     3.1    37.8    +      -       +      +
   1251E  ILE*     2.9    28.6    +      -       +      +
   1254E  ALA*     3.5    28.0    -      -       +      -
   1255E  ALA*     3.6    21.0    -      -       +      +
   1258E  VAL*     4.1    33.4    -      -       +      -
   1337E  LEU*     3.8     3.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1182 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1178E  VAL*     3.0    29.3    +      -       +      +
   1179E  LEU*     3.6    19.5    -      -       +      +
   1181E  TRP*     1.3    93.4    -      -       +      +
   1183E  ALA*     1.3    56.9    +      -       -      +
   1185E  MET*     3.6    26.7    +      -       +      +
   1186E  LEU*     3.0    27.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA1183 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1179E  LEU      2.7    17.2    +      -       -      +
   1180E  GLY*     3.4     1.8    -      -       -      +
   1181E  TRP      3.1     0.2    -      -       -      -
   1182E  LEU*     1.3    76.0    -      -       -      +
   1184E  VAL*     1.3    59.0    +      -       -      +
   1186E  LEU*     3.4     7.7    +      -       +      +
   1187E  CYS*     2.9    22.0    +      -       -      +
   1329E  VAL*     3.2    22.2    -      -       +      +
   1332E  ALA*     5.1     1.1    -      -       +      -
   1333E  ALA*     3.3    30.7    -      -       +      +
   1336E  LEU*     5.3     3.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL1184 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1180E  GLY      2.9    15.6    +      -       -      +
   1181E  TRP*     3.0    34.3    -      -       +      +
   1183E  ALA*     1.3    73.2    -      -       -      +
   1185E  MET*     1.3    61.8    +      -       -      +
   1186E  LEU      3.2     0.2    -      -       -      -
   1187E  CYS*     3.2     8.6    +      -       +      +
   1188E  CYS*     2.9    27.0    +      -       -      +
   1247E  VAL*     4.6    11.2    -      -       +      +
   1250E  SER*     3.9    11.0    -      -       -      +
   1251E  ILE*     4.4    16.6    -      -       +      +
   1254E  ALA*     5.3     0.9    -      -       +      -
   1295E  VAL*     3.3    35.7    -      -       +      -
   1333E  ALA*     3.4    11.2    -      -       +      +
   1337E  LEU*     4.9     4.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET1185 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1181E  TRP*     3.1    49.4    +      -       +      +
   1182E  LEU*     3.6    34.8    -      -       +      +
   1184E  VAL*     1.3    75.4    -      -       -      +
   1186E  LEU*     1.3    58.2    +      -       -      +
   1188E  CYS*     3.2     8.3    +      -       -      +
   1189E  ALA*     2.9    30.4    +      -       -      +
   1251E  ILE*     3.8    29.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1186 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1182E  LEU      3.0    19.5    +      -       -      +
   1183E  ALA*     3.4     7.9    -      -       +      +
   1185E  MET*     1.3    75.1    -      -       -      +
   1187E  CYS*     1.3    58.6    +      -       -      +
   1189E  ALA*     3.8     6.5    -      -       +      -
   1190E  LEU*     3.0    63.5    +      -       +      +
   1329E  VAL*     4.1    19.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS1187 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1183E  ALA      2.9    15.0    +      -       -      +
   1184E  VAL*     3.4    15.0    -      -       -      +
   1186E  LEU*     1.3    77.2    -      -       -      +
   1188E  CYS*     1.3    59.0    +      -       -      +
   1190E  LEU*     3.7     6.5    -      -       -      +
   1193E  TRP*     3.1    52.4    +      -       -      -
   1247E  VAL*     5.7     2.9    -      -       -      -
   1295E  VAL*     5.3     2.9    -      -       -      -
   1299E  VAL*     4.3     6.1    -      -       -      -
   1326E  SER*     3.7    28.5    -      -       -      +
   1329E  VAL*     4.1     3.8    -      -       +      +
   1330E  GLY*     4.0    22.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS1188 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1184E  VAL      2.9    13.7    +      -       -      +
   1185E  MET      3.5     8.5    -      -       -      +
   1186E  LEU      3.2     0.2    -      -       -      -
   1187E  CYS*     1.3    79.8    -      -       -      +
   1189E  ALA*     1.3    60.0    +      -       -      +
   1190E  LEU      3.8     3.5    +      -       -      +
   1213E  LEU*     4.5     7.4    -      -       -      +
   1214E  TRP*     3.1    65.9    +      -       -      -
   1247E  VAL*     3.7    27.8    -      -       +      -
   1248E  ILE*     5.4     2.2    -      -       -      -
   1251E  ILE*     3.9    17.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA1189 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1185E  MET      2.9    16.7    +      -       -      +
   1186E  LEU*     3.3     7.6    +      -       +      +
   1188E  CYS*     1.3    77.2    -      -       -      +
   1190E  LEU*     1.3    65.0    +      -       +      +
   1191E  PRO*     3.6     5.9    -      -       -      +
   1214E  TRP*     5.2     3.1    -      -       -      -
   1215E  MET*     4.8    12.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1190 (chain E). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1186E  LEU*     3.0    49.4    +      -       +      +
   1187E  CYS      3.7    10.6    +      -       -      +
   1188E  CYS      3.5     3.1    -      -       -      +
   1189E  ALA*     1.3    78.7    -      -       +      +
   1191E  PRO*     1.3    67.6    -      -       +      +
   1192E  MET*     3.1    38.6    +      -       +      -
   1193E  TRP*     3.8     9.7    +      -       -      -
   1212E  GLY*     4.7     0.5    -      -       -      -
   1213E  LEU      4.7     1.4    +      -       -      -
   1325E  ALA*     5.6     0.2    -      -       +      -
   1326E  SER*     4.3    13.5    -      -       -      +
   1329E  VAL*     4.7    15.3    -      -       +      -
----------------------------------------------------------
 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