Contacts of the helix formed by residues 260 - 285 (chain D) in PDB entry 2GPV


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 SER 260 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    257D  VAL*     5.4     1.7    -      -       -      +
    258D  PRO*     3.3     7.9    +      -       -      -
    259D  ASP*     1.3    76.5    -      -       -      +
    261D  ASP*     1.3    74.5    +      -       -      +
    262D  ILE*     3.4     6.9    +      -       -      +
    263D  LYS*     3.3    24.4    +      -       -      +
    264D  ALA*     3.4    19.1    +      -       -      +
    339D  LEU*     4.8    12.6    -      -       -      +
    340D  ALA*     5.3     0.3    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 261 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260D  SER*     1.3    81.4    +      -       -      +
    262D  ILE*     1.3    84.8    +      -       +      +
    263D  LYS      3.2     0.2    +      -       -      -
    264D  ALA*     3.3    10.2    +      -       -      +
    265D  LEU*     3.3    23.0    +      -       +      +
    339D  LEU*     3.7    23.3    +      -       -      +
    340D  ALA*     4.4     8.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 262 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260D  SER*     3.4     4.4    +      -       -      +
    261D  ASP*     1.3    91.9    +      -       +      +
    263D  LYS*     1.3    54.3    +      -       -      +
    265D  LEU*     3.0    17.3    +      -       +      +
    266D  THR*     2.6    51.7    +      -       -      +
    441D  GLU      5.8     8.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 263 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    253D  PRO*     4.8    10.3    -      -       -      +
    254D  ASP*     3.1    30.1    +      -       +      +
    255D  PRO*     4.7     4.4    -      -       -      +
    257D  VAL*     2.8    42.4    +      -       +      +
    258D  PRO      3.9     2.0    -      -       -      +
    259D  ASP*     3.7    36.4    +      -       -      +
    260D  SER*     3.3    20.1    +      -       -      +
    262D  ILE*     1.3    77.5    -      -       -      +
    264D  ALA*     1.3    67.1    +      -       -      +
    266D  THR*     2.9     8.5    +      -       -      -
    267D  THR*     2.8    32.9    +      -       -      +
    330D  TYR*     5.4     5.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 264 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    260D  SER      3.4     8.1    +      -       -      +
    261D  ASP      3.3    10.1    +      -       -      +
    263D  LYS*     1.3    78.9    -      -       -      +
    265D  LEU*     1.3    57.0    +      -       -      +
    267D  THR*     3.5     2.9    +      -       -      -
    268D  LEU*     3.1    37.6    +      -       +      +
    330D  TYR*     3.2    28.6    +      -       +      +
    332D  MET*     4.8     5.8    -      -       +      -
    336D  GLN      5.8     0.2    -      -       -      +
    340D  ALA*     3.7    26.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 265 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261D  ASP*     3.4    24.2    -      -       +      +
    262D  ILE*     3.0    17.0    +      -       +      +
    264D  ALA*     1.3    73.7    -      -       +      +
    266D  THR*     1.3    66.2    +      -       -      +
    267D  THR      3.1     1.6    -      -       -      -
    268D  LEU*     3.2     4.2    +      -       +      +
    269D  CYS*     2.9    36.8    +      -       -      -
    340D  ALA      4.4    19.3    -      -       -      +
    342D  LEU*     4.4    13.5    -      -       +      -
    434D  HIS*     5.8     0.7    -      -       -      +
    438D  ILE*     4.1    23.3    -      -       +      -
    441D  GLU*     6.1     1.3    -      -       -      +
    503D  OHT      3.9    27.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 266 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    262D  ILE*     2.6    38.4    +      -       -      +
    263D  LYS*     3.5     7.4    -      -       -      -
    265D  LEU*     1.3    72.0    -      -       -      +
    267D  THR*     1.3    62.0    +      -       -      +
    269D  CYS*     3.9     5.0    -      -       -      +
    270D  ASP*     3.1    35.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 267 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251D  ALA*     3.6    40.9    -      -       +      +
    253D  PRO*     4.3    21.4    -      -       +      +
    254D  ASP      5.0     1.6    +      -       -      -
    263D  LYS*     2.8    25.4    +      -       -      +
    264D  ALA*     3.7     6.7    -      -       -      -
    266D  THR*     1.3    75.8    -      -       -      +
    268D  LEU*     1.3    55.8    +      -       +      +
    269D  CYS      3.2     0.2    -      -       -      -
    270D  ASP*     3.4     4.6    +      -       -      +
    271D  LEU*     2.7    35.4    +      -       +      +
    330D  TYR*     4.5    15.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 268 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    264D  ALA*     3.1    25.0    +      -       +      +
    265D  LEU*     3.2     5.8    +      -       -      +
    267D  THR*     1.3    75.8    -      -       -      +
    269D  CYS*     1.3    53.2    +      -       -      +
    271D  LEU*     3.5    10.6    -      -       +      +
    272D  ALA*     2.8    35.7    +      -       -      +
    326D  TYR*     3.7    43.1    -      -       +      -
    330D  TYR*     4.2    14.1    -      -       +      -
    332D  MET*     4.5     9.2    -      -       -      -
    342D  LEU*     3.8    28.7    -      -       +      -
    503D  OHT      3.6    38.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 269 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265D  LEU*     2.9    30.3    +      -       -      +
    266D  THR*     3.9     6.5    -      -       -      +
    268D  LEU*     1.3    74.8    -      -       -      +
    270D  ASP*     1.3    59.6    +      -       -      +
    272D  ALA*     3.7     1.7    -      -       -      +
    273D  ASP*     2.8    41.5    +      -       -      +
    435D  PHE*     3.9    29.4    -      -       -      -
    438D  ILE*     6.3     1.6    -      -       -      -
    503D  OHT      3.9    26.3    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 270 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    251D  ALA      6.1     0.2    -      -       -      +
    266D  THR*     3.1    29.2    +      -       -      +
    267D  THR*     3.8     4.0    -      -       -      +
    269D  CYS*     1.3    79.2    -      -       -      +
    271D  LEU*     1.3    59.0    +      -       -      +
    273D  ASP*     3.4    11.1    +      -       -      +
    274D  ARG*     3.0    47.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 271 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249D  ILE*     4.0    27.6    -      -       +      +
    250D  TYR      4.5     1.1    -      -       -      +
    251D  ALA*     4.3    28.5    -      -       +      +
    267D  THR      2.7    22.1    +      -       -      +
    268D  LEU*     3.5    10.5    -      -       +      +
    270D  ASP*     1.3    69.8    -      -       -      +
    272D  ALA*     1.3    55.7    +      -       -      +
    274D  ARG*     3.1    13.1    +      -       -      +
    275D  GLU*     2.8    56.9    +      -       +      +
    326D  TYR*     3.5    43.1    -      -       +      +
    503D  OHT      3.9     9.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 272 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    268D  LEU      2.8    21.2    +      -       -      +
    269D  CYS      3.7     3.8    -      -       -      +
    271D  LEU*     1.3    72.5    -      -       -      +
    273D  ASP*     1.3    54.4    +      -       -      +
    275D  GLU*     3.1     8.0    +      -       -      +
    276D  LEU*     2.8    40.4    +      -       +      +
    309D  LEU*     4.1     9.5    -      -       +      +
    503D  OHT      3.5    49.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 273 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449B  LEU*     6.0     1.9    -      -       -      +
    269D  CYS*     2.8    28.0    +      -       -      +
    270D  ASP*     3.5    12.8    -      -       -      +
    272D  ALA*     1.3    74.7    -      -       -      +
    274D  ARG*     1.3    62.4    +      -       +      +
    276D  LEU*     3.7    17.3    +      -       -      +
    277D  VAL*     3.7    14.6    +      -       -      +
    503D  OHT      3.1    37.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 274 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249D  ILE*     3.4    34.4    -      -       +      +
    250D  TYR      3.1    27.5    +      -       -      +
    251D  ALA*     3.5    19.8    +      -       -      +
    252D  MET*     4.9    16.8    -      -       -      +
    267D  THR      5.2     0.2    +      -       -      -
    270D  ASP*     3.0    27.9    +      -       +      +
    271D  LEU*     3.7    16.5    -      -       -      +
    273D  ASP*     1.3    74.5    -      -       +      +
    275D  GLU*     1.3    67.1    +      -       -      +
    277D  VAL*     3.4    19.7    +      -       -      +
    278D  VAL*     3.8     5.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 275 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    249D  ILE*     3.9    23.8    -      -       +      +
    271D  LEU*     2.8    44.5    +      -       +      +
    272D  ALA      3.5     4.0    -      -       -      +
    274D  ARG*     1.3    74.5    -      -       -      +
    276D  LEU*     1.3    66.0    +      -       -      +
    278D  VAL*     3.0    11.1    +      -       +      +
    279D  ILE*     2.9    26.7    +      -       +      +
    309D  LEU*     3.8    20.4    -      -       +      +
    312D  GLY*     5.7     0.7    -      -       -      -
    316D  ARG*     3.9    19.5    +      -       -      -
    326D  TYR      5.1     0.4    -      -       -      -
    503D  OHT      2.8    30.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 276 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    446B  MET*     4.7    14.4    -      -       -      -
    450B  PHE*     4.5    15.3    -      -       +      -
    272D  ALA      2.8    24.1    +      -       -      +
    273D  ASP*     3.7    18.6    -      -       -      +
    274D  ARG      3.4     0.2    -      -       -      -
    275D  GLU*     1.3    72.5    -      -       -      +
    277D  VAL*     1.3    65.1    +      -       +      +
    279D  ILE*     2.9    22.2    +      -       +      +
    280D  ILE*     2.8    33.2    +      -       +      +
    305D  TRP*     3.7    50.7    -      -       +      +
    309D  LEU*     5.0     5.2    -      -       +      -
    503D  OHT      5.1     5.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 277 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453B  MET*     2.9    49.9    -      -       +      +
    273D  ASP      3.7    10.9    +      -       -      +
    274D  ARG*     3.4    11.5    +      -       -      +
    275D  GLU      3.2     0.6    +      -       -      -
    276D  LEU*     1.3    80.5    -      -       +      +
    278D  VAL*     1.3    70.9    +      -       +      +
    280D  ILE*     4.8     1.8    -      -       +      -
    281D  GLY*     3.3     8.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 278 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246D  PRO*     3.8    28.1    -      -       +      +
    247D  GLU      6.1     0.2    -      -       -      +
    249D  ILE*     3.7    28.3    -      -       +      -
    274D  ARG      3.8     5.1    +      -       -      +
    275D  GLU*     3.0    15.8    +      -       +      +
    277D  VAL*     1.3    80.8    -      -       +      +
    279D  ILE*     1.3    58.1    -      -       +      +
    281D  GLY*     4.4     2.5    -      -       -      +
    282D  TRP*     2.7    34.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 279 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    246D  PRO*     5.5     3.4    -      -       +      -
    275D  GLU*     2.9    21.5    +      -       +      +
    276D  LEU*     2.9    22.0    +      -       +      +
    278D  VAL*     1.3    78.9    -      -       +      +
    280D  ILE*     1.3    59.6    +      -       +      +
    282D  TRP*     3.3    14.7    -      -       +      +
    283D  ALA*     2.8    25.3    +      -       -      +
    301D  LEU*     4.5    10.8    -      -       +      -
    305D  TRP*     4.7     1.6    -      -       -      +
    308D  ILE*     3.6    49.6    -      -       +      +
    309D  LEU*     3.8    32.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 280 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    449B  LEU*     4.4     2.7    -      -       +      +
    450B  PHE*     3.7    39.5    -      -       +      +
    453B  MET*     3.5    46.0    -      -       +      -
    454B  LEU*     3.5    29.1    -      -       +      +
    276D  LEU*     2.8    24.8    +      -       +      +
    277D  VAL*     3.7     6.7    -      -       -      +
    279D  ILE*     1.3    75.7    -      -       +      +
    281D  GLY*     1.3    65.3    +      -       -      +
    283D  ALA*     3.1    21.2    +      -       -      +
    284D  LYS*     3.3    11.0    +      -       -      +
    301D  LEU*     4.0     6.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 281 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453B  MET*     4.3     4.8    -      -       -      +
    277D  VAL      3.3    11.0    +      -       -      -
    278D  VAL*     3.9     3.6    -      -       -      -
    280D  ILE*     1.3    78.8    -      -       -      +
    282D  TRP*     1.3    59.3    +      -       -      +
    284D  LYS*     3.4    22.4    +      -       -      +
    285D  HIS*     3.0    24.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 282 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    241D  LEU*     4.6     9.6    +      -       +      +
    244D  ALA*     3.5    34.3    -      -       +      +
    245D  GLU*     4.6     8.7    +      -       -      +
    246D  PRO*     3.9    19.3    -      -       +      -
    278D  VAL      2.7    23.7    +      -       -      +
    279D  ILE*     3.3    33.7    -      -       +      +
    281D  GLY*     1.3    72.7    -      -       -      +
    283D  ALA*     1.3    69.2    +      -       +      +
    285D  HIS*     2.9    27.8    +      -       -      +
    286D  ILE*     3.5    35.2    +      -       +      +
    308D  ILE*     3.7    28.5    -      -       +      -
    367D  VAL*     4.5     6.5    +      -       -      +
    370D  LYS*     3.8    48.4    -      -       +      +
    371D  ALA*     4.0     6.1    -      -       +      -
    374D  LEU*     4.2     5.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 283 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279D  ILE      2.8    16.6    +      -       -      +
    280D  ILE*     3.1    13.9    +      -       -      +
    282D  TRP*     1.3    82.3    -      -       +      +
    284D  LYS*     1.3    62.0    +      -       -      +
    286D  ILE*     3.1    17.2    +      -       -      +
    289D  PHE*     3.0    45.3    -      -       +      +
    301D  LEU*     4.3     9.0    -      -       +      -
    374D  LEU*     4.0    11.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 284 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    453B  MET      3.3    27.4    +      -       -      -
    454B  LEU*     3.5    33.6    +      -       +      +
    455B  GLU      4.2     8.7    -      -       -      -
    280D  ILE*     3.3    12.0    +      -       -      +
    281D  GLY*     3.6    15.0    -      -       -      +
    282D  TRP      3.1     0.8    +      -       -      -
    283D  ALA*     1.3    78.4    -      -       -      +
    285D  HIS*     1.3    65.9    +      -       +      +
    286D  ILE      3.2     8.2    +      -       -      +
    289D  PHE*     4.0     3.1    -      -       +      -
    290D  SER*     3.0    31.6    +      -       -      +
    297D  GLN*     5.1     3.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 285 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240D  HIS*     3.0    38.0    +      -       -      +
    241D  LEU*     5.2     0.4    -      -       -      +
    244D  ALA*     3.8    30.0    -      -       +      +
    281D  GLY*     3.0    29.2    +      -       -      -
    282D  TRP*     2.9    13.6    +      -       -      +
    284D  LYS*     1.3    78.9    -      -       +      +
    286D  ILE*     1.3    61.6    +      -       -      +
    287D  PRO*     3.3     0.9    -      -       -      +
----------------------------------------------------------
 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