Contacts of the helix formed by residues 154 - 176 (chain F) in PDB entry 5K58


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 ASP 154 (chain F).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152F  THR      4.0     0.6    +      -       -      -
    153F  THR*     1.3    75.1    -      -       -      +
    155F  GLU*     1.3    84.8    +      -       -      +
    156F  THR*     3.2    16.0    +      -       -      -
    157F  LEU*     3.5    17.2    -      -       +      +
    158F  LEU*     2.6    35.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 155 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137F  ARG*     3.9     4.3    -      -       +      +
    140F  MET*     3.5    26.5    -      -       +      +
    141F  ARG*     3.7    38.0    +      -       +      +
    151F  TYR*     6.3     0.4    -      -       +      -
    153F  THR      3.4     4.5    +      -       -      +
    154F  ASP*     1.3    92.7    +      -       -      +
    156F  THR*     1.3    75.8    +      -       -      +
    158F  LEU*     3.1    18.1    +      -       +      +
    159F  ALA*     3.1    16.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 156 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180E  TYR*     6.0     1.6    -      -       -      +
    189E  ARG*     5.0     0.2    +      -       -      -
    133F  GLU*     4.6     2.6    -      -       -      +
    137F  ARG*     3.7    37.1    +      -       -      +
    141F  ARG*     5.5     1.2    +      -       -      -
    154F  ASP*     3.2    12.9    +      -       -      -
    155F  GLU*     1.3    92.6    +      -       -      +
    157F  LEU*     1.3    59.7    +      -       +      +
    160F  SER*     3.3    22.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 157 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184E  ASP      5.3     0.2    -      -       -      +
    185E  ASP*     4.2    24.5    -      -       +      +
    188E  ALA*     4.1    14.6    -      -       +      +
    189E  ARG*     2.8    78.9    +      -       +      +
    192E  LEU*     4.4     9.0    -      -       +      -
    153F  THR*     5.0     8.3    -      -       +      -
    154F  ASP*     3.3    19.3    +      -       +      +
    156F  THR*     1.3    78.5    -      -       +      +
    158F  LEU*     1.3    66.9    +      -       -      +
    160F  SER*     2.8     9.4    +      -       -      -
    161F  GLN*     3.1     4.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 158 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192E  LEU*     4.4    18.6    -      -       +      -
    140F  MET*     2.9    37.7    -      -       +      -
    151F  TYR*     3.7    42.0    -      -       +      -
    153F  THR*     3.5    31.2    -      -       +      +
    154F  ASP      2.6    17.5    +      -       -      +
    155F  GLU*     3.1     2.7    +      -       -      +
    157F  LEU*     1.3    78.4    -      -       -      +
    159F  ALA*     1.3    65.6    +      -       -      +
    161F  GLN*     3.0    16.2    -      -       -      +
    162F  ILE*     3.1    11.9    -      -       +      +
    196F  GLN      4.8     3.8    -      -       -      +
    197F  LEU*     5.0    14.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 159 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133F  GLU*     3.8     6.1    -      -       +      +
    136F  LEU*     3.4    35.9    -      -       +      +
    137F  ARG*     3.8    24.0    -      -       +      -
    140F  MET*     3.1    13.6    -      -       -      +
    155F  GLU      3.1     3.7    +      -       -      +
    158F  LEU*     1.3    78.7    -      -       -      +
    160F  SER*     1.3    55.4    +      -       -      +
    162F  ILE*     2.7    30.6    +      -       -      +
    163F  LEU*     2.9    12.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 160 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169E  MET*     5.6     1.1    -      -       -      +
    172E  ARG*     4.2     6.4    +      -       -      +
    180E  TYR*     3.8     7.8    -      -       -      -
    189E  ARG*     2.5    45.6    +      -       -      -
    133F  GLU*     3.2    27.8    +      -       -      -
    156F  THR      3.3    12.1    +      -       -      -
    157F  LEU*     2.8    11.3    +      -       -      -
    158F  LEU      3.4     0.2    -      -       -      -
    159F  ALA*     1.3    77.2    -      -       -      +
    161F  GLN*     1.3    51.6    +      -       -      +
    163F  LEU*     3.7     3.5    -      -       -      +
    164F  ALA*     2.8    34.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 161 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165E  PHE*     3.9    18.1    -      -       -      -
    189E  ARG*     3.2    42.9    +      -       -      +
    192E  LEU*     3.2    20.9    -      -       +      +
    193E  ILE*     3.3    26.5    -      -       -      +
    157F  LEU      3.2     9.9    -      -       -      +
    158F  LEU*     3.0    15.4    +      -       +      +
    160F  SER*     1.3    82.6    +      -       -      +
    162F  ILE*     1.3    63.9    +      -       +      +
    164F  ALA*     3.3    16.1    -      -       -      +
    165F  PHE*     3.4     8.0    +      -       -      +
    193F  ILE*     5.8     0.2    -      -       -      +
    196F  GLN*     2.8    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 162 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192E  LEU*     6.4     0.2    -      -       +      -
     88F  LEU*     5.5     6.7    -      -       +      +
     92F  VAL*     3.9    26.7    -      -       +      -
    136F  LEU*     4.2    12.3    -      -       +      -
    140F  MET*     4.5     5.2    -      -       +      -
    158F  LEU*     3.1    20.4    -      -       +      +
    159F  ALA*     2.7    25.8    +      -       -      +
    161F  GLN*     1.3    80.4    -      -       +      +
    163F  LEU*     1.3    57.5    +      -       -      +
    164F  ALA      3.1     1.8    -      -       -      -
    165F  PHE*     2.7    30.5    +      -       +      +
    166F  CYS*     3.1    15.4    +      -       -      -
    193F  ILE*     3.3    40.2    -      -       +      -
    196F  GLN*     5.1     2.2    -      -       +      +
    197F  LEU*     4.3    13.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 163 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172E  ARG*     4.2    19.1    -      -       -      +
    175E  ARG*     4.7     0.9    -      -       -      +
     95F  LEU*     3.9    19.3    -      -       +      -
    129F  PHE*     3.7    38.1    -      -       +      +
    130F  GLU*     6.2     0.2    -      -       -      +
    132F  ILE*     3.5    33.7    -      -       +      -
    133F  GLU*     4.3    10.5    -      -       +      -
    136F  LEU*     4.6     9.5    -      -       +      +
    159F  ALA      2.9    11.7    +      -       -      +
    160F  SER*     3.8     9.9    -      -       -      +
    162F  ILE*     1.3    76.8    -      -       -      +
    164F  ALA*     1.3    62.5    +      -       -      +
    166F  CYS*     3.2    12.9    +      -       +      +
    167F  GLU*     3.2    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 164 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165E  PHE*     3.8    30.6    -      -       +      +
    168E  GLY*     3.3    28.4    +      -       -      -
    169E  MET*     4.2    17.0    -      -       +      +
    172E  ARG*     5.6     4.6    -      -       -      +
    160F  SER      2.8    18.3    +      -       -      +
    161F  GLN*     3.3    10.1    -      -       -      +
    163F  LEU*     1.3    77.0    -      -       -      +
    165F  PHE*     1.3    63.1    +      -       -      +
    166F  CYS      3.2     1.0    +      -       -      -
    167F  GLU*     5.1     2.7    -      -       -      -
    168F  GLY*     3.3     6.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 165 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161E  GLN*     3.3    47.1    -      -       +      -
    164E  ALA*     4.1    11.6    -      -       +      +
    165E  PHE*     4.5    13.6    -      -       +      +
     92F  VAL*     4.7    10.8    -      -       +      -
     96F  LEU*     4.3    18.6    -      -       +      -
    161F  GLN      3.4     6.7    +      -       -      +
    162F  ILE*     2.7    23.5    +      -       +      +
    164F  ALA*     1.3    74.3    -      -       -      +
    166F  CYS*     1.3    65.9    +      -       -      -
    168F  GLY*     3.9     1.4    +      -       -      -
    169F  MET*     3.0    49.7    +      -       +      +
    186F  PHE*     5.8     1.8    -      +       -      -
    189F  ARG*     3.9    17.5    -      -       +      -
    193F  ILE*     5.0    16.6    -      -       +      -
    196F  GLN*     5.8     2.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 166 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92F  VAL*     4.6    15.5    -      -       -      -
     95F  LEU*     3.6    35.9    -      -       +      -
     96F  LEU*     3.7    26.9    -      -       +      +
    162F  ILE*     3.1    18.6    +      -       -      -
    163F  LEU*     3.7     9.2    -      -       +      +
    164F  ALA      3.1     1.0    -      -       -      -
    165F  PHE*     1.3    84.3    -      -       -      +
    167F  GLU*     1.3    55.2    +      -       -      +
    169F  MET*     2.9     5.2    +      -       -      +
    170F  LEU*     2.7    41.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 167 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168E  GLY*     3.9    15.7    -      -       -      +
    171E  SER*     3.2    22.0    +      -       -      +
    172E  ARG*     3.0    31.1    -      -       -      +
    175E  ARG*     3.1    31.6    +      -       -      -
    129F  PHE*     3.8    28.2    -      -       +      -
    163F  LEU*     3.2    20.0    +      -       -      +
    164F  ALA      3.5     0.2    +      -       -      -
    166F  CYS*     1.3    75.4    -      -       -      +
    168F  GLY*     1.3    50.9    +      -       -      +
    170F  LEU*     2.8    11.1    +      -       +      +
    171F  SER*     2.6    41.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 168 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164E  ALA*     3.1    26.4    -      -       -      +
    167E  GLU*     3.8     9.1    -      -       -      +
    168E  GLY*     3.6    11.9    -      -       -      -
    164F  ALA      3.3     7.7    +      -       -      -
    165F  PHE      4.2     0.2    -      -       -      -
    166F  CYS      3.2     0.6    -      -       -      -
    167F  GLU*     1.3    76.8    -      -       -      +
    169F  MET*     1.3    60.9    +      -       -      +
    171F  SER*     4.0     2.5    -      -       -      -
    172F  ARG*     3.1    32.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with MET 169 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160E  SER*     5.8     1.6    -      -       -      -
    164E  ALA*     3.6    22.7    -      -       +      -
     96F  LEU*     4.4    14.1    -      -       +      -
    165F  PHE*     3.0    35.7    -      -       +      +
    166F  CYS*     2.9    11.2    +      -       -      +
    168F  GLY*     1.3    77.8    -      -       -      +
    170F  LEU*     1.3    63.2    +      -       -      +
    171F  SER      3.4     0.9    -      -       -      -
    172F  ARG*     4.3    13.9    -      -       -      +
    173F  PHE*     3.8     9.2    +      -       -      +
    180F  TYR      4.9     0.9    -      -       -      +
    181F  ARG      5.0     2.0    -      -       -      +
    182F  PRO*     3.6    41.9    -      -       +      +
    189F  ARG*     3.3    45.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 170 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95F  LEU*     4.9    11.0    -      -       +      +
     96F  LEU*     4.8    15.3    -      -       +      +
     99F  GLY*     4.9     9.0    -      -       -      -
    106F  THR*     4.2    16.8    -      -       +      +
    109F  LEU*     4.9    18.8    -      -       +      -
    110F  THR*     3.2    28.9    -      -       +      +
    129F  PHE*     4.9    11.9    -      -       +      -
    166F  CYS*     2.7    30.4    +      -       +      +
    167F  GLU*     2.8    17.4    +      -       +      +
    169F  MET*     1.3    85.5    -      -       +      +
    171F  SER*     1.3    59.9    +      -       -      +
    173F  PHE*     4.0     5.5    -      -       -      +
    174F  VAL*     3.5    12.5    +      -       -      +
    182F  PRO*     4.6    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 171 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110E  THR      5.8     2.9    -      -       -      -
    167E  GLU*     3.2    34.7    +      -       -      -
    171E  SER*     4.7     7.3    +      -       -      -
    110F  THR*     4.7     5.2    -      -       -      +
    112F  HIS*     5.0    10.4    -      -       -      -
    167F  GLU*     2.6    28.7    +      -       -      +
    168F  GLY*     4.4     0.4    -      -       -      -
    169F  MET      3.4     0.2    -      -       -      -
    170F  LEU*     1.3    72.7    -      -       -      +
    172F  ARG*     1.3    60.1    +      -       -      +
    173F  PHE      3.1     1.8    -      -       -      -
    174F  VAL*     2.8    21.6    +      -       -      +
    175F  ARG*     2.9    19.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 172 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129E  PHE      4.9     1.0    +      -       -      -
    130E  GLU*     4.2     3.4    +      -       -      -
    133E  GLU*     2.4    35.1    +      -       -      +
    160E  SER*     4.7    14.0    -      -       -      +
    163E  LEU*     4.8     9.7    -      -       -      +
    164E  ALA*     4.2    22.9    -      -       -      +
    167E  GLU*     3.3    18.0    +      -       -      +
    168F  GLY      3.1    22.5    +      -       -      +
    169F  MET*     4.3    10.9    -      -       -      -
    170F  LEU      3.6     0.2    -      -       -      -
    171F  SER*     1.3    75.6    -      -       -      +
    173F  PHE*     1.3    58.8    +      -       -      +
    174F  VAL      3.5     0.3    +      -       -      -
    175F  ARG*     3.4    26.4    +      -       -      +
    176F  SER*     3.0    26.7    +      -       -      -
    180F  TYR*     3.1    62.5    +      -       +      +
    189F  ARG*     6.2     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 173 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99F  GLY      3.9     3.4    -      -       -      -
    100F  GLU*     3.7    35.2    -      -       +      -
    103F  PRO*     3.9    23.6    -      -       +      -
    106F  THR*     4.5    16.8    -      -       +      -
    169F  MET      3.8    16.7    +      -       -      +
    170F  LEU*     4.0     6.7    -      -       -      +
    171F  SER      3.1     0.4    -      -       -      -
    172F  ARG*     1.3    80.7    -      -       -      +
    174F  VAL*     1.3    56.0    +      -       -      +
    176F  SER*     4.0     0.7    +      -       -      -
    177F  GLU      3.8     0.2    +      -       -      -
    178F  PHE*     2.9    71.3    +      +       +      -
    180F  TYR      3.2    25.1    +      -       -      +
    181F  ARG*     3.5    28.0    -      -       +      -
    182F  PRO*     3.6    11.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 174 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106F  THR*     4.4     8.5    -      -       +      -
    107F  ARG*     4.3    34.5    +      -       +      +
    110F  THR*     3.7    22.7    -      -       +      +
    112F  HIS*     3.7    31.4    -      -       +      +
    170F  LEU      3.5    15.5    -      -       -      +
    171F  SER      2.8    10.6    +      -       -      +
    173F  PHE*     1.3    76.6    -      -       -      +
    175F  ARG*     1.3    70.2    +      -       +      +
    176F  SER      3.1     1.8    -      -       -      -
    177F  GLU*     2.9    17.3    +      -       -      +
    178F  PHE*     4.8     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 175 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    109E  LEU      5.3     0.2    -      -       -      -
    110E  THR      5.0    11.4    -      -       -      +
    122E  GLN*     4.4     5.5    +      -       -      +
    125E  ILE*     4.8     3.6    -      -       -      -
    126E  ASN*     3.1    60.3    +      -       -      +
    129E  PHE*     3.3    29.5    -      -       -      +
    130E  GLU*     3.8    13.3    +      -       -      -
    163E  LEU*     5.7     0.2    -      -       -      +
    167E  GLU*     2.8    34.8    +      -       -      +
    112F  HIS*     5.9     2.0    -      -       -      +
    171F  SER*     2.9    19.4    +      -       -      +
    172F  ARG*     3.4    39.3    -      -       -      +
    174F  VAL*     1.3    77.1    -      -       +      +
    176F  SER*     1.3    60.4    +      -       -      +
    177F  GLU*     3.2    14.4    -      -       -      +
    180F  TYR*     5.0     3.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 176 (chain F). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126E  ASN*     4.7     4.0    -      -       -      +
    172F  ARG      3.0    18.2    +      -       -      -
    173F  PHE      4.0     1.2    +      -       -      -
    174F  VAL      3.1     0.4    -      -       -      -
    175F  ARG*     1.3    82.0    -      -       -      +
    177F  GLU*     1.3    71.2    +      -       -      +
    179F  LYS*     3.6    20.4    +      -       -      +
    180F  TYR*     3.1    37.4    +      -       -      -
----------------------------------------------------------
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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