Contacts of the helix formed by residues 206 - 233 (chain A) in PDB entry 6UQY


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 ARG 206 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  PHE*     4.4     3.3    -      -       +      -
    153A  GLU*     2.8    46.1    +      -       -      +
    201A  VAL*     3.0    26.3    +      -       +      +
    204A  GLY*     3.0    29.5    +      -       -      +
    205A  ASN*     1.3    74.5    -      -       -      +
    207A  VAL*     1.3    63.7    +      -       -      +
    208A  GLU      3.3     2.7    -      -       -      +
    209A  ARG*     3.2    31.6    +      -       +      +
    210A  ALA      2.9    19.1    +      -       -      -
    402A  GOL      3.3    28.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 207 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  SER*     3.6    25.9    -      -       -      +
    201A  VAL*     4.1     6.1    -      -       +      -
    202A  VAL*     4.0    29.4    -      -       +      +
    205A  ASN*     3.6     5.1    +      -       -      +
    206A  ARG*     1.3    77.2    -      -       -      +
    208A  GLU*     1.3    57.5    +      -       -      +
    210A  ALA*     3.3     3.9    +      -       -      +
    211A  GLN*     2.9    54.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 208 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205A  ASN      5.4     0.2    +      -       -      -
    206A  ARG      3.3     0.4    -      -       -      -
    207A  VAL*     1.3    79.6    -      -       -      +
    209A  ARG*     1.3    68.3    +      -       +      +
    211A  GLN*     3.3    18.7    +      -       +      +
    212A  ARG*     2.8    66.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 209 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  PHE*     3.8    10.1    -      -       +      -
    152A  HIS*     5.9     0.8    -      -       -      -
    153A  GLU*     2.8    42.9    +      -       -      +
    161A  LEU*     3.6    26.5    -      -       +      +
    206A  ARG*     3.2    36.5    +      -       +      +
    208A  GLU*     1.3    84.4    -      -       -      +
    210A  ALA*     1.3    63.1    +      -       -      +
    212A  ARG*     3.3    13.9    +      -       -      +
    213A  TYR*     3.0    25.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 210 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  PHE*     3.4    21.7    -      -       +      -
    195A  LEU*     3.7    11.3    -      -       +      +
    196A  SER*     3.6    26.2    -      -       -      +
    201A  VAL*     3.8     5.2    -      -       +      -
    206A  ARG      2.9    13.6    +      -       -      +
    207A  VAL      3.6     7.9    -      -       -      +
    209A  ARG*     1.3    79.0    -      -       -      +
    211A  GLN*     1.3    57.2    +      -       -      +
    213A  TYR*     3.4     2.0    +      -       -      +
    214A  LEU*     2.9    35.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 211 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  SER*     3.6    17.3    +      -       -      +
    207A  VAL*     2.9    35.4    +      -       -      +
    208A  GLU*     3.6    23.1    -      -       +      +
    210A  ALA*     1.3    74.7    -      -       -      +
    212A  ARG*     1.3    64.2    +      -       -      +
    214A  LEU*     4.0    10.1    -      -       +      -
    215A  GLN*     3.0    35.0    +      -       +      +
    246A  ARG*     6.4     0.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 212 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  LEU*     3.9    29.6    -      -       +      +
    162A  GLU*     3.2    39.6    +      -       +      +
    208A  GLU*     2.8    53.4    +      -       -      +
    209A  ARG*     3.6    14.1    -      -       -      +
    210A  ALA      3.2     0.2    -      -       -      -
    211A  GLN*     1.3    76.5    -      -       -      +
    213A  TYR*     1.3    63.1    +      -       -      +
    215A  GLN*     4.0     4.6    -      -       -      +
    216A  ALA*     3.1    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 213 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  SER*     3.4    24.8    +      -       -      -
    148A  ASP*     3.6     2.1    -      -       +      +
    149A  PHE*     3.8    29.6    -      +       +      -
    161A  LEU*     4.0    15.1    -      -       +      +
    164A  LEU*     3.8    25.8    -      -       +      -
    165A  ALA*     3.6    33.2    -      -       +      -
    168A  SER*     2.8    24.7    +      -       -      -
    192A  SER*     4.7     5.2    -      -       -      -
    195A  LEU*     3.8    24.5    -      -       +      -
    209A  ARG      3.0    16.6    +      -       -      +
    210A  ALA      3.7     2.2    -      -       -      +
    212A  ARG*     1.3    76.7    -      -       -      +
    214A  LEU*     1.3    65.0    +      -       -      +
    216A  ALA*     3.1     7.1    +      -       -      +
    217A  VAL*     3.0    34.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 214 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192A  SER*     3.4    27.1    -      -       -      +
    193A  THR      3.9     3.6    -      -       -      +
    194A  ASP*     3.5    25.6    -      -       -      +
    195A  LEU*     3.7    16.8    -      -       +      +
    196A  SER*     4.0     3.6    -      -       -      +
    210A  ALA      2.9    22.8    +      -       -      +
    211A  GLN*     3.6    12.3    -      -       +      +
    213A  TYR*     1.3    84.0    -      -       +      +
    215A  GLN*     1.3    72.7    +      -       +      +
    217A  VAL*     3.4     1.6    +      -       -      +
    218A  ASN*     2.9    38.3    +      -       -      +
    242A  LEU*     3.6    32.8    -      -       +      -
    246A  ARG*     5.5     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 215 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211A  GLN*     3.0    29.2    +      -       +      +
    212A  ARG*     4.0     4.9    -      -       -      +
    214A  LEU*     1.3    80.2    -      -       +      +
    216A  ALA*     1.3    60.3    +      -       -      +
    218A  ASN*     4.5     4.1    -      -       -      +
    219A  ALA*     2.9    34.8    +      -       -      +
    242A  LEU*     3.8    17.6    -      -       -      +
    246A  ARG*     3.7    26.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 216 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  GLU*     5.1    13.7    -      -       +      +
    165A  ALA*     3.5    20.2    -      -       +      -
    169A  VAL*     4.7     0.5    -      -       -      +
    212A  ARG      3.1    17.6    +      -       -      +
    213A  TYR*     3.1     5.9    +      -       -      +
    215A  GLN*     1.3    73.8    -      -       -      +
    217A  VAL*     1.3    65.6    +      -       -      +
    219A  ALA*     4.1     3.9    -      -       -      +
    220A  SER*     3.3    25.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 217 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  SER*     4.7     9.4    -      -       -      +
    165A  ALA*     3.8    17.7    -      -       +      +
    168A  SER*     4.4     4.3    -      -       -      -
    169A  VAL*     3.9    14.8    -      -       +      -
    172A  ILE*     5.2     2.2    -      -       +      -
    192A  SER*     4.4    12.6    -      -       -      +
    213A  TYR*     3.0    46.9    +      -       +      +
    214A  LEU      3.8     6.3    -      -       -      +
    216A  ALA*     1.3    75.3    -      -       -      +
    218A  ASN*     1.3    69.3    +      -       -      +
    221A  LEU*     2.9    51.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 218 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  SER*     3.4    15.8    +      -       -      -
    192A  SER*     2.8    50.5    +      -       -      -
    214A  LEU*     2.9    22.3    +      -       +      +
    215A  GLN*     4.4     4.3    -      -       -      +
    217A  VAL*     1.3    79.2    -      -       -      +
    219A  ALA*     1.3    57.7    +      -       -      +
    222A  PRO*     3.1    24.0    -      -       -      +
    238A  TRP*     4.2     9.3    +      -       +      -
    240A  ASP*     4.6     2.9    +      -       -      +
    242A  LEU*     4.0    25.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 219 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215A  GLN*     2.9    20.5    +      -       -      +
    216A  ALA*     4.1     3.6    -      -       -      +
    218A  ASN*     1.3    79.3    -      -       -      +
    220A  SER*     1.3    61.5    -      -       -      +
    222A  PRO*     3.9     4.2    -      -       -      +
    223A  ILE*     3.3    23.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 220 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  VAL*     3.7    20.6    -      -       -      +
    216A  ALA      3.3    15.4    +      -       -      -
    217A  VAL      4.2     0.7    -      -       -      -
    219A  ALA*     1.3    80.2    -      -       -      +
    221A  LEU*     1.3    66.5    +      -       -      +
    223A  ILE*     3.2    19.0    +      -       -      +
    224A  GLN*     3.2    21.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 221 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  VAL*     3.9    37.0    -      -       +      +
    172A  ILE*     3.9    38.8    -      -       +      -
    173A  ARG*     4.5     3.6    -      -       +      +
    189A  VAL*     4.4     3.6    -      -       +      -
    190A  VAL      4.9     3.4    -      -       -      +
    191A  SER*     5.4     0.4    -      -       -      -
    192A  SER      5.8     0.2    -      -       -      +
    217A  VAL*     2.9    27.6    +      -       +      +
    220A  SER*     1.3    76.7    -      -       -      +
    222A  PRO*     1.3    60.7    -      -       +      +
    224A  GLN*     3.1     3.4    +      -       +      -
    225A  LEU*     2.9    55.0    +      -       +      +
    238A  TRP*     3.6    23.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 222 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218A  ASN      3.1    24.9    -      -       -      +
    219A  ALA      3.9     4.9    -      -       -      +
    220A  SER      3.6     2.2    -      -       -      -
    221A  LEU*     1.3    94.9    -      -       +      +
    223A  ILE*     1.3    56.7    +      -       +      +
    225A  LEU*     3.9     6.3    -      -       +      +
    226A  ALA*     2.9    31.7    +      -       -      +
    229A  ARG*     5.0     1.6    +      -       -      -
    238A  TRP*     3.7    45.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 223 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  ALA*     3.3    23.3    -      -       +      +
    220A  SER*     3.2     9.6    +      -       -      +
    222A  PRO*     1.3    78.4    -      -       +      +
    224A  GLN*     1.3    66.7    +      -       +      +
    226A  ALA*     3.4     6.0    +      -       -      +
    227A  ALA*     3.3    21.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 224 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  VAL*     3.8    20.7    -      -       +      +
    170A  ALA*     5.1     3.1    -      -       -      +
    173A  ARG*     4.0    36.9    +      -       +      +
    220A  SER*     3.3    23.6    +      -       -      +
    221A  LEU*     3.1     7.7    +      -       +      +
    223A  ILE*     1.3    77.5    -      -       +      +
    225A  LEU*     1.3    66.7    +      -       -      +
    227A  ALA*     3.3     8.3    +      -       -      +
    228A  LEU*     3.1    22.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 225 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  ILE*     5.0     0.7    -      -       +      -
    173A  ARG*     4.4    11.2    -      -       -      +
    176A  VAL*     3.9    31.0    -      -       +      -
    189A  VAL*     3.8    30.7    -      -       +      -
    221A  LEU*     2.9    47.7    +      -       +      +
    222A  PRO*     3.9     4.3    -      -       +      +
    224A  GLN*     1.3    79.7    -      -       -      +
    226A  ALA*     1.3    56.6    +      -       -      +
    228A  LEU*     3.3     6.9    +      -       +      +
    229A  ARG*     2.8    33.4    +      -       -      +
    236A  LEU*     4.0    24.9    -      -       +      +
    238A  TRP*     3.9    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 226 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222A  PRO      2.9    19.3    +      -       -      +
    223A  ILE*     3.8     7.2    -      -       -      +
    224A  GLN      3.3     0.4    -      -       -      -
    225A  LEU*     1.3    75.5    -      -       -      +
    227A  ALA*     1.3    61.9    +      -       -      +
    229A  ARG*     3.4    36.9    +      -       -      +
    230A  LYS*     3.1    24.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 227 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ARG*     5.1     6.1    -      -       -      +
    223A  ILE      3.3    11.2    +      -       -      +
    224A  GLN*     3.7     9.6    -      -       -      +
    225A  LEU      3.2     0.4    -      -       -      -
    226A  ALA*     1.3    78.7    -      -       -      +
    228A  LEU*     1.3    57.1    +      -       -      +
    230A  LYS*     3.3     9.7    +      -       -      +
    231A  THR*     2.9    34.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 228 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ARG*     3.8    46.6    -      -       +      +
    176A  VAL*     3.6    31.9    -      -       +      -
    177A  GLN*     3.8    27.6    -      -       +      +
    224A  GLN      3.1    12.7    +      -       -      +
    225A  LEU*     3.6    11.7    -      -       +      +
    227A  ALA*     1.3    75.6    -      -       -      +
    229A  ARG*     1.3    64.1    +      -       -      +
    231A  THR*     3.3     7.5    +      -       +      -
    232A  ARG*     3.0    41.5    +      -       +      +
    234A  LEU*     4.2     5.5    -      -       +      +
    236A  LEU*     5.6     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 229 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222A  PRO      5.0     1.4    +      -       -      -
    225A  LEU*     2.8    22.4    +      -       -      +
    226A  ALA*     3.4    43.0    +      -       -      +
    228A  LEU*     1.3    72.3    -      -       -      +
    230A  LYS*     1.3    60.8    +      -       -      +
    233A  GLY*     3.0    10.4    +      -       -      -
    234A  LEU*     2.8    59.8    +      -       -      +
    236A  LEU*     3.3    47.8    +      -       +      +
    238A  TRP*     5.4     6.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 230 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226A  ALA      3.1    13.7    +      -       -      +
    227A  ALA*     3.7     8.3    -      -       -      +
    228A  LEU      3.2     0.2    -      -       -      -
    229A  ARG*     1.3    86.0    -      -       +      +
    231A  THR*     1.3    67.8    +      -       -      +
    232A  ARG      3.3     0.3    +      -       -      -
    233A  GLY*     3.5     6.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 231 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ARG*     5.6     1.9    +      -       -      +
    227A  ALA*     2.9    19.3    +      -       -      +
    228A  LEU*     3.3    11.6    +      -       +      -
    230A  LYS*     1.3    80.2    -      -       -      +
    232A  ARG*     1.3    68.2    +      -       +      +
    233A  GLY      3.6     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 232 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  GLN*     4.2    14.2    -      -       -      +
    180A  GLY*     3.1    31.5    +      -       -      -
    181A  GLU*     3.2    45.1    +      -       -      +
    185A  ARG*     3.2    22.3    +      -       -      +
    228A  LEU*     3.0    31.8    +      -       +      +
    231A  THR*     1.3    84.5    -      -       +      +
    233A  GLY*     1.3    64.0    +      -       -      +
    234A  LEU*     3.3    19.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 233 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  ARG*     3.3    22.9    +      -       -      +
    229A  ARG      3.0     7.6    +      -       -      -
    230A  LYS      3.5     5.3    +      -       -      -
    231A  THR      3.4     3.6    +      -       -      -
    232A  ARG*     1.3    76.3    -      -       -      +
    234A  LEU*     1.3    62.6    +      -       -      +
    235A  GLU      4.1     0.2    +      -       -      -
----------------------------------------------------------
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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