Contacts of the helix formed by residues 150 - 171 (chain C) in PDB entry 3OP5


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 150 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145C  ASN*     5.2     2.4    -      -       -      +
    149C  PHE*     1.3    75.6    -      -       -      +
    151C  ARG*     1.3    59.4    -      -       -      +
    152C  LYS*     3.9     9.5    +      -       -      +
    153C  THR*     2.8    33.6    +      -       -      -
    154C  VAL*     2.9    27.0    +      -       -      +
    255C  LEU*     4.2     1.1    -      -       -      -
    340C  ASP*     5.0     3.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 151 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150C  SER*     1.3    70.9    -      -       -      +
    152C  LYS*     1.3    56.6    +      -       -      +
    154C  VAL*     3.5     1.2    +      -       -      +
    155C  LEU*     3.0    44.1    +      -       +      +
    255C  LEU*     3.7    22.3    -      -       +      +
    296C  PRO*     3.6    27.4    -      -       +      +
    297C  GLY      4.3     2.4    -      -       -      +
    298C  GLU*     2.8    42.4    +      -       -      +
    327C  GLY      4.2     2.6    +      -       -      -
    330C  ALA*     4.1    18.8    -      -       -      +
    331C  ILE*     3.7    31.8    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 152 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150C  SER*     3.2     8.4    -      -       -      +
    151C  ARG*     1.3    78.1    -      -       -      +
    153C  THR*     1.4    56.4    +      -       -      +
    155C  LEU*     3.5     1.6    +      -       -      +
    156C  GLN*     2.9    43.3    +      -       -      +
    328C  LEU*     3.8    10.7    -      -       +      +
    331C  ILE*     3.8    17.0    -      -       +      +
    333C  SER*     2.9    23.6    +      -       -      +
    334C  LYS      2.8    21.6    +      -       -      -
    336C  ASP*     2.7    33.6    +      -       -      -
    338C  LYS*     3.6    19.3    -      -       -      +
    340C  ASP*     3.7    25.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 153 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149C  PHE*     3.9    29.8    -      -       +      -
    150C  SER*     2.8    30.0    +      -       -      -
    152C  LYS*     1.4    74.0    -      -       -      +
    154C  VAL*     1.4    54.7    +      -       -      +
    156C  GLN*     3.3     2.6    +      -       -      +
    157C  LEU*     2.9    52.8    +      -       +      +
    339C  LEU*     2.8    29.2    +      -       -      +
    340C  ASP*     3.5    13.7    +      -       -      +
    341C  LEU      4.3    11.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 154 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149C  PHE*     3.7    12.8    -      -       +      +
    150C  SER      2.9    22.4    +      -       -      +
    151C  ARG      3.9     3.4    -      -       -      +
    153C  THR*     1.4    70.9    -      -       -      +
    155C  LEU*     1.4    57.4    +      -       +      +
    157C  LEU*     3.7     7.9    -      -       -      +
    158C  SER*     2.7    38.1    +      -       -      +
    251C  MET*     3.8    41.3    -      -       +      +
    254C  TRP*     3.7    31.0    -      -       +      -
    255C  LEU*     3.8    24.7    -      -       +      -
    299C  ILE*     5.0     2.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 155 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151C  ARG*     3.0    32.4    +      -       +      +
    152C  LYS      3.9     2.0    -      -       -      +
    154C  VAL*     1.4    77.2    -      -       +      +
    156C  GLN*     1.4    57.1    +      -       -      +
    158C  SER*     3.5     4.3    +      -       -      -
    159C  LEU*     3.0    36.0    +      -       -      +
    251C  MET*     5.8     0.2    -      -       -      -
    298C  GLU*     3.7    33.9    -      -       +      +
    299C  ILE*     5.2     5.6    -      -       +      -
    324C  LEU*     3.6    34.1    -      -       +      +
    327C  GLY      3.7    28.3    -      -       -      +
    328C  LEU*     3.7    25.6    -      -       +      +
    331C  ILE*     4.8     1.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 156 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152C  LYS*     2.9    48.4    +      -       +      +
    153C  THR      3.8     2.9    -      -       -      +
    155C  LEU*     1.4    73.0    -      -       -      +
    157C  LEU*     1.3    66.1    +      -       -      +
    159C  LEU*     3.6     5.3    +      -       -      +
    160C  ARG*     3.5    31.6    +      -       -      +
    328C  LEU*     3.4    15.8    -      -       +      +
    334C  LYS      3.1    11.6    -      -       -      +
    335C  ASP*     2.9    26.8    +      -       -      -
    336C  ASP*     4.1     2.2    -      -       -      -
    337C  GLY*     3.4    16.6    -      -       -      +
    338C  LYS      3.2    25.8    -      -       -      +
    339C  LEU*     3.8    14.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 157 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138C  LEU*     3.6    37.0    -      -       +      -
    149C  PHE*     4.1    17.3    -      -       +      -
    153C  THR*     2.9    43.1    +      -       +      +
    154C  VAL*     3.7     3.8    -      -       -      +
    156C  GLN*     1.3    75.5    -      -       -      +
    158C  SER*     1.4    56.0    +      -       -      +
    160C  ARG*     3.2     8.4    +      -       -      +
    161C  ILE*     3.0    35.6    +      -       +      +
    193C  VAL*     4.0    13.8    -      -       +      +
    254C  TRP*     4.1    20.0    -      -       +      -
    339C  LEU*     3.9    31.6    -      -       +      +
    341C  LEU      5.6     0.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 158 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154C  VAL*     2.7    23.2    +      -       -      +
    155C  LEU*     3.8     2.5    -      -       -      -
    156C  GLN      3.4     0.2    -      -       -      -
    157C  LEU*     1.4    72.1    -      -       -      +
    159C  LEU*     1.3    60.0    +      -       -      +
    161C  ILE*     3.8    10.0    -      -       -      +
    162C  LEU*     2.9    33.6    +      -       -      +
    247C  LEU*     3.9    12.1    -      -       -      +
    251C  MET*     3.2    32.9    -      -       -      +
    254C  TRP*     4.5     2.6    -      -       -      -
    324C  LEU*     3.6    20.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 159 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155C  LEU      3.0    20.5    +      -       -      +
    156C  GLN*     3.9     5.4    -      -       -      +
    157C  LEU      3.3     0.4    -      -       -      -
    158C  SER*     1.3    74.6    -      -       -      +
    160C  ARG*     1.4    76.0    +      -       -      +
    162C  LEU*     3.5     6.7    +      -       -      +
    163C  ASP*     3.3    25.8    +      -       -      +
    321C  ARG*     3.8    45.9    +      -       +      +
    324C  LEU*     3.9    17.0    -      -       +      -
    325C  LEU*     4.0    10.1    -      -       +      -
    328C  LEU*     3.7    30.1    -      -       +      -
    335C  ASP*     3.7    24.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 160 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105C  LEU*     5.3     1.2    -      -       -      +
    107C  TYR*     3.5    44.0    -      -       +      +
    109C  GLY      5.5     0.5    +      -       -      -
    156C  GLN*     3.5    17.0    +      -       -      +
    157C  LEU      3.2     8.2    +      -       -      +
    159C  LEU*     1.4    95.6    +      -       -      +
    161C  ILE*     1.3    65.1    +      -       -      +
    163C  ASP*     2.7    42.6    +      -       -      +
    164C  ILE*     3.1    26.8    +      -       +      +
    191C  ASP      5.4     1.8    -      -       -      +
    193C  VAL*     3.9    13.7    -      -       +      +
    321C  ARG*     6.2     0.6    -      -       -      +
    335C  ASP*     2.7    43.8    +      -       -      -
    337C  GLY*     5.0     7.9    -      -       -      -
    339C  LEU*     5.0     6.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 161 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    157C  LEU*     3.0    27.8    +      -       +      +
    158C  SER      3.3     4.9    +      -       -      +
    160C  ARG*     1.3    74.3    -      -       -      +
    162C  LEU*     1.4    52.9    +      -       -      +
    164C  ILE*     3.1    14.7    +      -       +      +
    165C  LEU*     2.8    55.9    +      -       +      +
    178C  ILE*     4.3    14.6    -      -       +      -
    183C  LEU*     3.8    41.1    -      -       +      -
    193C  VAL*     5.0     4.3    -      -       +      -
    195C  LEU*     5.5     3.1    -      -       +      -
    247C  LEU*     3.8    23.8    -      -       +      -
    254C  TRP*     3.8    18.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 162 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158C  SER      2.9    17.1    +      -       -      +
    159C  LEU*     3.6     6.7    -      -       -      +
    160C  ARG      3.3     0.2    -      -       -      -
    161C  ILE*     1.4    77.2    -      -       -      +
    163C  ASP*     1.4    55.2    +      -       -      +
    165C  LEU*     4.0     3.0    -      -       +      +
    166C  GLU*     2.9    31.7    +      -       -      +
    244C  LEU*     3.7    30.5    -      -       +      -
    247C  LEU*     3.9    15.5    -      -       +      -
    302C  TYR*     4.4     7.9    -      -       +      +
    317C  TYR*     4.5     9.8    -      -       +      +
    320C  LEU*     3.9    26.9    -      -       +      -
    321C  ARG*     3.5    30.8    +      -       +      +
    324C  LEU*     3.7    26.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 163 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  TRP*     4.6     3.7    +      -       -      +
    105C  LEU*     3.4    29.6    -      -       +      +
    107C  TYR      5.1     3.6    -      -       -      +
    108C  LEU*     3.7    14.4    -      -       +      +
    109C  GLY      6.2     0.2    -      -       -      +
    159C  LEU      3.3     8.2    +      -       -      +
    160C  ARG*     2.7    39.7    +      -       -      +
    161C  ILE      3.2     0.4    -      -       -      -
    162C  LEU*     1.4    75.1    -      -       -      +
    164C  ILE*     1.4    63.2    +      -       +      +
    166C  GLU*     3.6     2.1    +      -       -      +
    167C  TYR*     3.1    23.7    +      -       -      +
    321C  ARG*     3.1    34.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 164 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108C  LEU*     4.1     7.0    -      -       +      -
    109C  GLY*     3.5    42.2    -      -       -      +
    110C  VAL*     3.9    15.7    -      -       +      +
    160C  ARG*     3.1    18.5    +      -       +      +
    161C  ILE*     3.1    21.0    +      -       +      +
    163C  ASP*     1.4    74.1    -      -       -      +
    165C  LEU*     1.4    59.3    +      -       +      +
    167C  TYR*     3.3     4.7    +      -       -      +
    168C  ILE*     3.0    31.3    +      -       +      +
    183C  LEU*     5.1     1.3    -      -       +      -
    193C  VAL*     4.1     9.4    -      -       +      +
    194C  TYR      4.6     0.4    -      -       -      -
    195C  LEU*     3.8    44.4    -      -       +      +
    198C  TYR*     4.3     4.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 165 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161C  ILE*     2.8    39.0    +      -       +      +
    162C  LEU*     4.0     4.7    -      -       +      +
    164C  ILE*     1.4    69.8    -      -       -      +
    166C  GLU*     1.4    64.4    +      -       -      +
    167C  TYR      3.3     0.2    +      -       -      -
    168C  ILE*     3.4    14.2    +      -       +      -
    169C  HIS*     2.9    42.1    +      -       +      -
    175C  HIS*     4.6     0.4    -      -       +      -
    178C  ILE*     3.9    20.2    -      -       +      -
    195C  LEU*     4.4     9.9    -      -       +      -
    243C  ASP*     3.6    44.6    -      -       +      +
    244C  LEU*     4.0    21.8    -      -       +      -
    247C  LEU*     4.5     7.9    -      -       +      -
    317C  TYR*     5.1     0.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 166 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  TRP*     4.2    17.4    -      -       +      -
    103C  ARG*     5.3     5.6    +      -       -      -
    162C  LEU      2.9    19.9    +      -       -      +
    163C  ASP      3.9     3.1    -      -       -      +
    164C  ILE      3.4     0.2    -      -       -      -
    165C  LEU*     1.4    74.3    -      -       -      +
    167C  TYR*     1.3    57.9    +      -       -      +
    169C  HIS*     3.8     1.0    -      -       -      +
    170C  GLU*     2.9    38.7    +      -       +      +
    314C  LYS*     5.9     1.6    -      -       -      -
    317C  TYR*     3.6    44.0    +      -       +      +
    318C  GLU*     4.6     3.2    -      -       -      +
    321C  ARG*     2.6    39.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 167 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90C  ALA*     2.5    33.0    +      -       +      -
     95C  GLN*     3.6    20.9    -      -       -      +
     96C  ILE*     3.6    18.6    -      -       +      +
     99C  TRP*     3.4    50.6    -      +       +      +
    108C  LEU*     3.6    18.8    -      -       +      -
    110C  VAL*     3.8    25.8    -      -       +      -
    163C  ASP      3.1    15.2    +      -       -      +
    164C  ILE      3.4     7.9    -      -       -      +
    165C  LEU      3.3     0.2    -      -       -      -
    166C  GLU*     1.3    75.2    -      -       -      +
    168C  ILE*     1.3    67.6    +      -       +      +
    170C  GLU*     3.3     2.4    +      -       -      +
    171C  HIS*     2.6    57.1    +      +       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 168 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86C  PHE*     3.7    32.8    -      -       +      -
    110C  VAL*     4.2     9.9    -      -       +      -
    164C  ILE*     3.0    20.6    +      -       +      +
    165C  LEU*     3.5    17.5    -      -       +      +
    167C  TYR*     1.3    86.9    -      -       +      +
    169C  HIS*     1.4    61.2    +      -       +      +
    171C  HIS*     3.1    17.0    +      -       -      +
    173C  TYR*     2.9    35.8    +      -       +      +
    174C  VAL      4.0     2.0    -      -       -      -
    175C  HIS*     3.6    38.8    -      -       +      +
    195C  LEU*     5.1     2.9    -      -       +      -
    198C  TYR*     4.5    12.6    -      -       +      +
    243C  ASP*     4.1     6.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 169 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165C  LEU*     2.9    35.4    +      -       +      +
    166C  GLU      3.8     2.0    -      -       -      +
    168C  ILE*     1.4    77.7    -      -       +      +
    170C  GLU*     1.3    59.7    +      -       -      +
    172C  GLU*     3.2    14.0    +      -       -      -
    173C  TYR      3.2    20.2    -      -       -      -
    174C  VAL*     3.6     9.4    -      -       +      +
    204C  TYR*     2.6    22.6    +      -       -      -
    240C  ARG*     3.5    38.9    -      -       +      +
    243C  ASP*     2.7    33.7    +      -       +      -
    244C  LEU*     4.9     3.1    -      -       +      -
    317C  TYR*     2.7    35.3    +      +       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  TRP*     3.8    28.3    -      -       +      -
    103C  ARG*     5.4     2.6    +      -       -      +
    166C  GLU*     2.9    29.7    +      -       +      +
    167C  TYR      3.3     4.7    +      -       -      +
    169C  HIS*     1.3    75.9    -      -       +      +
    171C  HIS*     1.3    61.0    +      -       -      +
    172C  GLU*     3.4     5.4    +      -       -      +
    240C  ARG*     4.5     9.4    +      -       -      -
    314C  LYS*     3.4    37.1    +      -       -      +
    317C  TYR*     4.6     6.1    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     89C  ARG*     5.0     2.1    -      -       -      +
     90C  ALA*     3.8    18.3    -      -       +      +
     95C  GLN*     3.5    33.5    +      -       -      +
     99C  TRP*     3.9    19.7    -      +       -      -
    167C  TYR*     2.6    64.1    +      +       -      +
    168C  ILE*     3.1    12.3    +      -       -      +
    170C  GLU*     1.3    78.7    -      -       -      +
    172C  GLU*     1.4    65.2    +      -       -      +
    173C  TYR*     3.3    19.2    -      -       -      -
----------------------------------------------------------
 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