Contacts of the helix formed by residues 206 - 233 (chain B) 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 B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  PHE*     4.3     4.2    -      -       +      -
    153B  GLU*     2.9    47.6    +      -       -      +
    201B  VAL*     3.0    23.9    +      -       +      +
    204B  GLY*     3.0    27.3    +      -       -      +
    205B  ASN*     1.3    76.3    -      -       -      +
    207B  VAL*     1.3    63.8    +      -       -      +
    208B  GLU      3.3     2.7    -      -       -      -
    209B  ARG*     3.3    32.1    +      -       +      +
    210B  ALA*     3.0    19.1    +      -       -      +
    402B  GOL      3.3    29.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 207 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196B  SER*     3.6    26.6    -      -       -      +
    201B  VAL*     4.1     5.4    -      -       -      +
    202B  VAL*     4.1    29.8    -      -       +      +
    205B  ASN*     3.6     5.3    +      -       -      +
    206B  ARG*     1.3    77.2    -      -       -      +
    208B  GLU*     1.3    56.9    +      -       -      +
    210B  ALA*     3.3     4.0    +      -       -      +
    211B  GLN*     2.9    49.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 208 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    205B  ASN      5.5     0.4    +      -       -      -
    206B  ARG      3.3     0.6    -      -       -      -
    207B  VAL*     1.3    79.7    -      -       -      +
    209B  ARG*     1.3    67.1    +      -       +      +
    211B  GLN*     3.3    19.3    +      -       +      +
    212B  ARG*     2.8    64.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 209 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  PHE*     3.8     9.2    -      -       +      -
    152B  HIS*     5.9     1.0    -      -       -      -
    153B  GLU*     2.8    43.8    +      -       -      -
    161B  LEU*     3.6    24.0    -      -       +      +
    206B  ARG*     3.3    34.6    +      -       +      +
    208B  GLU*     1.3    83.3    -      -       +      +
    210B  ALA*     1.3    62.6    +      -       -      +
    212B  ARG*     3.2    15.9    +      -       -      +
    213B  TYR*     3.0    24.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 210 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  PHE*     3.5    20.7    -      -       +      -
    195B  LEU*     3.7    11.6    -      -       +      +
    196B  SER*     3.6    27.4    -      -       -      +
    201B  VAL*     3.9     4.7    -      -       +      -
    206B  ARG      3.0    13.8    +      -       -      +
    207B  VAL      3.5     8.1    -      -       -      +
    209B  ARG*     1.3    73.2    -      -       -      +
    211B  GLN*     1.3    65.1    -      -       -      +
    213B  TYR*     3.3     2.3    +      -       -      +
    214B  LEU*     2.9    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196B  SER*     3.7    15.7    +      -       -      +
    207B  VAL*     2.9    33.2    +      -       -      +
    208B  GLU*     3.3    22.6    +      -       +      +
    210B  ALA*     1.3    74.9    -      -       -      +
    212B  ARG*     1.3    63.8    +      -       -      +
    214B  LEU*     3.6    10.0    -      -       +      +
    215B  GLN*     3.0    35.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161B  LEU*     4.0    19.2    -      -       +      +
    162B  GLU*     3.0    38.9    +      -       +      +
    208B  GLU*     2.8    53.2    +      -       -      +
    209B  ARG*     3.6    22.2    -      -       -      +
    211B  GLN*     1.3    77.8    -      -       -      +
    213B  TYR*     1.3    64.0    +      -       -      +
    215B  GLN*     4.0     4.0    -      -       -      +
    216B  ALA*     3.1    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  SER*     3.4    24.5    +      -       -      -
    148B  ASP*     3.7     1.0    -      -       -      +
    149B  PHE*     3.8    30.3    -      +       +      -
    161B  LEU*     4.1    15.0    -      -       +      +
    164B  LEU*     3.7    27.4    -      -       +      -
    165B  ALA*     3.6    29.8    -      -       +      -
    168B  SER*     2.7    26.3    +      -       -      -
    192B  SER*     4.7     5.6    -      -       -      -
    195B  LEU*     3.9    24.2    -      -       +      -
    209B  ARG      3.0    16.4    +      -       -      +
    210B  ALA      3.8     1.3    -      -       -      +
    212B  ARG*     1.3    79.1    -      -       -      +
    214B  LEU*     1.3    65.9    +      -       -      +
    216B  ALA*     3.1     6.2    +      -       -      +
    217B  VAL*     3.0    35.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192B  SER*     3.4    25.8    -      -       -      +
    193B  THR      4.0     2.7    -      -       -      +
    194B  ASP*     3.5    24.9    -      -       -      +
    195B  LEU*     3.7    17.7    -      -       +      +
    196B  SER*     3.9     2.9    -      -       -      +
    210B  ALA      2.9    26.8    +      -       -      +
    211B  GLN*     3.6     9.4    -      -       +      +
    213B  TYR*     1.3    83.3    -      -       +      +
    215B  GLN*     1.3    72.6    +      -       +      +
    217B  VAL*     3.5     1.2    +      -       -      +
    218B  ASN*     2.9    39.0    +      -       -      +
    242B  LEU*     3.6    33.0    -      -       +      -
    246B  ARG*     5.3     1.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211B  GLN*     3.0    29.0    +      -       +      +
    212B  ARG*     4.0     4.3    -      -       -      +
    214B  LEU*     1.3    87.1    -      -       +      +
    216B  ALA*     1.3    55.8    +      -       -      +
    218B  ASN*     3.9     4.3    -      -       -      +
    219B  ALA*     2.9    34.7    +      -       -      +
    242B  LEU*     3.8    12.1    -      -       -      +
    246B  ARG*     3.5    27.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162B  GLU*     5.0    14.1    -      -       +      +
    165B  ALA*     3.5    23.8    -      -       +      -
    169B  VAL*     4.8     0.2    -      -       -      +
    212B  ARG      3.1    16.7    +      -       -      +
    213B  TYR*     3.1     2.3    +      -       -      +
    215B  GLN*     1.3    74.4    -      -       -      +
    217B  VAL*     1.3    66.2    +      -       -      +
    219B  ALA*     4.0     3.1    -      -       -      +
    220B  SER*     3.3    24.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145B  SER*     4.7     9.4    -      -       -      +
    165B  ALA*     3.7    18.4    -      -       +      +
    168B  SER*     4.5     3.6    -      -       -      -
    169B  VAL*     3.9    15.5    -      -       +      -
    172B  ILE*     5.4     1.8    -      -       +      -
    192B  SER*     4.3    12.1    -      -       -      +
    213B  TYR*     3.0    48.3    +      -       +      +
    214B  LEU      3.9     4.3    -      -       -      +
    216B  ALA*     1.3    76.9    -      -       -      +
    218B  ASN*     1.3    68.7    +      -       -      +
    221B  LEU*     2.9    46.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191B  SER*     3.5    16.6    +      -       -      -
    192B  SER*     2.9    48.5    +      -       -      -
    214B  LEU*     2.9    21.1    +      -       +      +
    215B  GLN*     4.3     6.5    -      -       -      +
    217B  VAL*     1.3    77.2    -      -       -      +
    219B  ALA*     1.3    62.9    +      -       -      +
    222B  PRO*     3.1    24.5    -      -       -      +
    238B  TRP*     4.1     8.7    +      -       +      -
    240B  ASP*     4.6     3.3    +      -       -      +
    242B  LEU*     4.0    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215B  GLN*     2.9    20.5    +      -       -      +
    216B  ALA*     4.0     4.5    -      -       -      +
    218B  ASN*     1.3    81.1    -      -       -      +
    220B  SER*     1.3    60.7    +      -       -      +
    222B  PRO*     3.9     4.2    -      -       -      +
    223B  ILE*     3.4    24.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166B  GLY*     6.2     0.2    -      -       -      -
    169B  VAL*     3.6    22.0    -      -       -      +
    216B  ALA      3.3    14.6    +      -       -      -
    219B  ALA*     1.3    79.9    -      -       -      +
    221B  LEU*     1.3    66.9    +      -       -      +
    223B  ILE*     3.2    11.0    +      -       -      +
    224B  GLN*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169B  VAL*     4.0    35.6    -      -       +      +
    172B  ILE*     3.8    38.8    -      -       +      -
    173B  ARG      4.6     1.3    -      -       -      +
    189B  VAL*     4.3     5.2    -      -       +      -
    190B  VAL      4.7     4.7    -      -       -      +
    191B  SER*     5.3     0.7    -      -       -      -
    192B  SER      5.7     0.2    -      -       -      +
    217B  VAL*     2.9    33.3    +      -       +      +
    220B  SER*     1.3    73.0    -      -       -      +
    222B  PRO*     1.3    61.3    -      -       +      +
    224B  GLN*     3.1     4.9    +      -       +      +
    225B  LEU*     2.9    49.8    +      -       +      +
    238B  TRP*     3.6    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PRO 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218B  ASN      3.1    25.4    -      -       -      +
    219B  ALA      3.9     5.6    -      -       -      +
    220B  SER      3.6     1.3    -      -       -      -
    221B  LEU*     1.3    94.3    -      -       +      +
    223B  ILE*     1.3    60.1    +      -       +      +
    225B  LEU*     3.9     6.3    -      -       +      +
    226B  ALA*     2.9    30.7    +      -       -      +
    238B  TRP*     3.7    44.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  ALA      3.4    20.2    -      -       -      +
    220B  SER*     3.2    10.5    +      -       -      +
    221B  LEU      3.2     0.4    -      -       -      -
    222B  PRO*     1.3    79.2    -      -       +      +
    224B  GLN*     1.3    73.3    +      -       -      +
    226B  ALA*     3.4     6.7    +      -       -      +
    227B  ALA*     3.2    21.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169B  VAL*     3.8    22.7    -      -       +      -
    173B  ARG*     3.1    43.3    +      -       +      -
    220B  SER*     3.0    21.2    +      -       -      +
    221B  LEU*     3.6     8.3    -      -       +      +
    223B  ILE*     1.3    84.0    -      -       -      +
    225B  LEU*     1.3    63.9    +      -       -      +
    227B  ALA*     3.3     8.4    +      -       -      +
    228B  LEU*     3.1    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172B  ILE*     4.9     0.9    -      -       +      -
    173B  ARG*     4.4    13.5    -      -       +      +
    176B  VAL*     4.0    28.9    -      -       +      -
    189B  VAL*     3.8    30.7    -      -       +      -
    221B  LEU*     2.9    47.8    +      -       +      +
    222B  PRO*     4.0     4.3    -      -       +      +
    224B  GLN*     1.3    73.7    -      -       -      +
    226B  ALA*     1.3    61.9    +      -       -      +
    228B  LEU*     3.3     6.5    +      -       +      +
    229B  ARG*     2.8    32.7    +      -       -      +
    236B  LEU*     3.9    25.9    -      -       +      +
    238B  TRP*     4.0    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222B  PRO      2.9    19.4    +      -       -      +
    223B  ILE*     3.7     6.5    -      -       -      +
    224B  GLN      3.3     0.2    -      -       -      -
    225B  LEU*     1.3    78.2    -      -       -      +
    227B  ALA*     1.3    61.0    +      -       -      +
    229B  ARG*     3.4    35.3    +      -       -      +
    230B  LYS*     3.2    21.0    +      -       -      +
    236B  LEU*     6.1     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  ARG*     4.7     7.9    -      -       -      +
    223B  ILE      3.2    13.0    +      -       -      +
    224B  GLN*     3.6    11.7    -      -       -      +
    225B  LEU      3.2     0.4    -      -       -      -
    226B  ALA*     1.3    75.6    -      -       -      +
    228B  LEU*     1.3    65.1    +      -       -      +
    230B  LYS*     3.3    11.1    +      -       -      +
    231B  THR*     3.0    27.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  ARG*     3.7    43.9    -      -       +      +
    176B  VAL*     3.6    29.2    -      -       +      -
    177B  GLN*     3.7    28.7    -      -       +      +
    224B  GLN      3.1    13.8    +      -       -      +
    225B  LEU*     3.7     8.7    -      -       +      +
    227B  ALA*     1.3    78.7    -      -       -      +
    229B  ARG*     1.3    66.4    +      -       -      +
    231B  THR*     3.2     8.5    +      -       +      -
    232B  ARG*     2.9    42.9    +      -       +      +
    234B  LEU*     4.1     7.6    -      -       +      +
    236B  LEU*     5.8     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225B  LEU      2.8    21.0    +      -       -      +
    226B  ALA*     3.4    34.7    +      -       -      +
    227B  ALA      3.3     0.2    -      -       -      -
    228B  LEU*     1.3    71.8    -      -       -      +
    230B  LYS*     1.3    71.5    +      -       -      +
    233B  GLY*     3.1     5.4    +      -       -      -
    234B  LEU*     3.0    55.5    +      -       -      +
    235B  GLU*     4.8     0.4    -      -       -      +
    236B  LEU*     3.9    37.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226B  ALA      3.2    11.5    +      -       -      +
    227B  ALA*     3.3    10.6    +      -       -      +
    228B  LEU      3.1     0.4    -      -       -      -
    229B  ARG*     1.3    90.2    -      -       -      +
    231B  THR*     1.3    68.0    +      -       -      +
    232B  ARG      3.3     0.5    +      -       -      -
    233B  GLY*     3.5     7.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  ARG*     5.6     2.0    +      -       -      -
    227B  ALA*     3.0    18.6    +      -       -      +
    228B  LEU*     3.2    11.6    +      -       +      -
    230B  LYS*     1.3    83.1    -      -       -      +
    232B  ARG*     1.3    68.2    +      -       +      +
    233B  GLY      3.7     0.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177B  GLN*     3.9    18.0    -      -       -      +
    180B  GLY*     3.3    32.0    +      -       -      -
    181B  GLU*     3.1    41.2    +      -       -      +
    185B  ARG*     3.1    20.5    +      -       -      +
    228B  LEU*     2.9    31.8    +      -       +      +
    231B  THR*     1.3    83.6    -      -       +      +
    233B  GLY*     1.3    64.4    +      -       -      +
    234B  LEU*     3.3    19.2    +      -       +      +
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Residues in contact with GLY 233 (chain B). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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    185B  ARG*     3.1    27.5    +      -       -      +
    229B  ARG      3.1     8.0    +      -       -      -
    230B  LYS      3.5     5.1    +      -       -      -
    231B  THR      3.4     4.0    +      -       -      -
    232B  ARG*     1.3    75.7    -      -       -      +
    234B  LEU*     1.3    61.4    +      -       -      +
    235B  GLU      4.3     0.3    +      -       -      -
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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