Contacts of the helix formed by residues 218 - 241 (chain B) in PDB entry 5FN2


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 PRO 218 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212B  SER*     5.3     0.3    +      -       -      -
    217B  GLY*     1.4    86.7    -      -       -      +
    219B  LEU*     1.3    65.2    +      -       -      +
    220B  ARG*     3.4     4.0    -      -       +      +
    221B  LEU*     3.7    23.0    -      -       +      +
    222B  GLN*     3.3    18.0    +      -       -      +
     32D  VAL*     4.1    16.2    -      -       +      +
     35D  PHE*     6.2     1.3    -      -       +      -
     36D  TRP*     3.3    54.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217B  GLY      3.7     2.2    +      -       -      -
    218B  PRO*     1.3    71.5    -      -       -      +
    220B  ARG*     1.3    60.9    +      -       +      +
    222B  GLN*     3.2    12.9    +      -       +      +
    223B  GLN*     2.9    42.6    +      -       +      +
    287B  ILE*     3.9    32.3    -      -       +      -
    288B  TYR      3.5    24.5    -      -       -      +
      2D  ASN*     3.8    35.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  MET*     5.0    16.6    -      -       -      +
    218B  PRO*     3.4     2.6    -      -       +      +
    219B  LEU*     1.3    77.7    -      -       -      +
    221B  LEU*     1.3    57.3    +      -       -      +
    223B  GLN*     3.2    29.6    +      -       -      +
    224B  ALA*     2.9    28.3    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    208B  VAL*     5.4     1.8    -      -       +      +
    211B  ILE*     5.6     1.1    -      -       +      -
    212B  SER*     3.3    21.3    -      -       -      +
    217B  GLY*     5.5     0.2    -      -       -      -
    218B  PRO*     3.5    23.5    +      -       +      +
    219B  LEU      3.2     0.2    -      -       -      -
    220B  ARG*     1.3    77.9    -      -       -      +
    222B  GLN*     1.3    59.0    +      -       -      +
    224B  ALA*     3.2    10.6    +      -       +      +
    225B  TYR*     2.9    47.8    +      -       +      -
     28D  PHE*     4.5     8.7    -      -       +      -
     32D  VAL*     3.4    48.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212B  SER*     3.2    38.8    +      -       -      +
    213B  ILE*     4.3     1.8    -      -       -      +
    216B  LYS      4.9     2.5    -      -       -      +
    217B  GLY      5.1     0.4    -      -       -      +
    218B  PRO      3.3    10.5    +      -       -      +
    219B  LEU*     3.2    16.8    +      -       +      +
    221B  LEU*     1.3    80.3    -      -       -      +
    223B  GLN*     1.3    60.8    +      -       -      +
    225B  TYR*     3.2     2.8    +      -       -      +
    226B  LEU*     2.9    62.0    +      -       +      +
    281B  THR*     3.0    25.6    +      -       -      +
    284B  PRO*     5.1     1.1    -      -       -      +
    287B  ILE*     4.4    25.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  MET*     5.5     3.7    -      -       -      +
     88B  PRO*     4.3    19.5    -      -       +      +
    219B  LEU*     2.9    32.7    +      -       +      +
    220B  ARG*     3.2    34.1    +      -       -      +
    222B  GLN*     1.3    81.1    -      -       -      +
    224B  ALA*     1.3    57.8    +      -       -      +
    226B  LEU*     3.2     4.4    +      -       -      +
    227B  ILE*     2.9    35.9    +      -       +      +
    286B  LEU*     3.6    24.8    -      -       +      +
    287B  ILE      4.7     4.3    +      -       -      +
    288B  TYR      3.0    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220B  ARG      2.9    12.6    +      -       -      +
    221B  LEU*     3.2    15.7    +      -       +      +
    223B  GLN*     1.3    76.1    -      -       -      +
    225B  TYR*     1.3    61.2    +      -       +      +
    227B  ILE*     3.0    18.8    -      -       +      +
    228B  MET*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  LEU*     4.3    10.8    -      -       +      -
    205B  PHE*     3.0    68.8    +      +       -      -
    208B  VAL*     3.0    24.8    -      -       +      +
    209B  GLY*     3.3    18.2    -      -       -      -
    212B  SER*     4.2     4.5    -      -       -      -
    213B  ILE*     4.2    14.6    -      -       +      -
    221B  LEU*     2.9    43.4    +      -       +      +
    222B  GLN*     3.6     9.6    -      -       -      +
    224B  ALA*     1.3    78.2    -      -       +      +
    226B  LEU*     1.3    57.4    +      -       -      +
    228B  MET*     3.2     7.8    +      -       +      +
    229B  ILE*     2.9    35.0    +      -       +      +
     28D  PHE*     4.2    11.4    -      +       -      -
----------------------------------------------------------
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Residues in contact with LEU 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213B  ILE*     3.4    30.5    -      -       +      -
    222B  GLN*     2.9    39.3    +      -       -      +
    223B  GLN      3.3     8.3    -      -       -      +
    225B  TYR*     1.3    76.9    -      -       -      +
    227B  ILE*     1.3    50.9    +      -       -      +
    229B  ILE*     3.2    10.7    +      -       +      +
    230B  SER*     2.5    35.9    +      -       -      -
    281B  THR      4.6     8.3    -      -       -      +
    282B  LEU      4.6    11.0    -      -       -      +
    284B  PRO*     4.4     9.2    -      -       +      -
    285B  ALA      4.4     0.9    -      -       -      -
    286B  LEU*     3.5    42.8    -      -       +      +
    383B  LEU*     4.3    13.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88B  PRO*     4.0    20.4    -      -       +      +
     91B  LEU*     3.4    44.6    -      -       +      -
     92B  CYS*     4.0    12.6    -      -       +      +
     95B  VAL*     5.0     5.6    -      -       +      -
    223B  GLN*     2.9    22.9    +      -       +      +
    224B  ALA*     3.0    22.4    -      -       +      +
    226B  LEU*     1.3    76.6    -      -       -      +
    228B  MET*     1.3    60.2    +      -       +      +
    230B  SER*     2.7    18.4    +      -       -      -
    231B  ALA*     2.9    21.0    +      -       -      +
    286B  LEU*     4.4     4.9    -      -       +      -
    386B  PHE*     4.0    24.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  VAL*     4.6    22.4    -      -       +      -
    174B  LEU*     6.4     0.9    -      -       +      -
    178B  SER*     4.4     4.5    -      -       -      +
    181B  TYR*     4.0    32.5    -      -       +      -
    205B  PHE*     3.5    40.4    -      -       +      -
    224B  ALA      2.9    13.0    +      -       -      +
    225B  TYR*     3.2    14.3    +      -       +      +
    227B  ILE*     1.3    82.0    -      -       +      +
    229B  ILE*     1.3    62.2    +      -       +      +
    231B  ALA*     3.2     6.3    +      -       -      +
    232B  LEU*     3.0    40.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170B  SER*     4.6    18.4    -      -       -      +
    173B  LEU*     3.8    28.4    -      -       +      +
    174B  LEU*     4.0    26.7    -      -       +      -
    213B  ILE*     4.7    12.3    -      -       +      -
    225B  TYR*     2.9    28.5    +      -       +      +
    226B  LEU*     3.2    12.1    -      -       +      +
    228B  MET*     1.3    76.0    -      -       +      +
    230B  SER*     1.3    65.9    +      -       -      +
    232B  LEU*     3.1    23.4    -      -       -      +
    233B  MET*     3.2    19.7    +      -       +      +
    282B  LEU*     6.2     5.4    -      -       +      -
    383B  LEU*     5.1    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 230 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    226B  LEU      2.5    25.0    +      -       -      -
    227B  ILE*     2.7     9.4    +      -       -      -
    229B  ILE*     1.3    75.0    -      -       -      +
    231B  ALA*     1.3    57.1    +      -       -      +
    233B  MET      3.5     0.2    +      -       -      -
    234B  ALA*     2.9    27.1    +      -       -      +
    383B  LEU*     3.5     9.8    -      -       -      +
    386B  PHE*     3.1    38.8    -      -       -      -
    387B  ILE*     3.4    31.7    -      -       -      +
    390B  SER*     5.6     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 231 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     92B  CYS*     4.6     4.7    -      -       -      +
     95B  VAL*     3.9    23.6    -      -       +      -
     96B  VAL*     3.9    25.1    -      -       +      -
    227B  ILE      2.9    13.0    +      -       -      +
    228B  MET*     3.2    12.3    +      -       -      +
    230B  SER*     1.3    70.8    -      -       -      +
    232B  LEU*     1.3    59.3    +      -       -      +
    233B  MET      3.0     1.1    -      -       -      -
    234B  ALA*     2.4    29.1    +      -       -      +
    235B  LEU*     2.8    15.9    +      -       +      -
    386B  PHE*     5.2     0.6    -      -       -      -
    390B  SER*     4.9     1.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 232 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106B  TYR*     5.7     0.4    -      -       -      +
    173B  LEU*     3.2    28.7    -      -       +      +
    174B  LEU*     5.5     1.1    -      -       +      -
    177B  PHE*     4.2     6.5    -      -       +      +
    178B  SER*     3.3    49.4    -      -       -      +
    181B  TYR*     4.7    12.8    -      -       +      -
    205B  PHE*     5.5     0.9    -      -       +      -
    228B  MET*     3.0    28.9    +      -       +      +
    229B  ILE*     3.1    30.1    -      -       -      +
    231B  ALA*     1.3    76.7    -      -       -      +
    233B  MET*     1.3    57.6    +      -       -      +
    235B  LEU*     3.5    17.7    -      -       +      +
    236B  VAL*     2.9    35.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 233 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173B  LEU*     3.8    24.0    -      -       +      -
    177B  PHE*     6.1     2.2    -      -       +      -
    229B  ILE*     3.2    25.8    +      -       +      +
    230B  SER      3.5     4.3    -      -       -      +
    231B  ALA      2.7     4.0    +      -       -      -
    232B  LEU*     1.3    72.3    -      -       -      +
    234B  ALA*     1.3    65.4    +      -       -      +
    236B  VAL*     3.2     9.0    +      -       +      +
    237B  PHE*     3.0    53.1    +      -       +      -
    387B  ILE*     3.5    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 234 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  VAL*     4.2     4.3    -      -       +      -
    230B  SER      2.9    13.8    +      -       -      +
    231B  ALA      2.4    19.1    +      -       -      +
    233B  MET*     1.3    70.8    -      -       -      +
    235B  LEU*     1.3    62.6    +      -       -      +
    237B  PHE*     2.9     5.0    +      -       -      +
    238B  ILE*     2.9    27.1    +      -       +      +
    387B  ILE*     3.5    25.9    -      -       -      +
    390B  SER*     3.6    19.1    -      -       -      -
    391B  VAL*     3.5    15.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 235 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95B  VAL*     5.6     1.8    -      -       +      -
     96B  VAL*     3.8    11.0    -      -       +      +
     99B  THR*     3.3    35.7    -      -       +      -
    100B  ILE*     3.6    25.8    -      -       +      -
    106B  TYR*     3.8    29.9    -      -       +      +
    181B  TYR*     4.0    24.2    -      -       +      -
    231B  ALA*     2.8    17.9    +      -       +      +
    232B  LEU*     3.5    25.6    -      -       +      +
    234B  ALA*     1.3    72.7    -      -       -      +
    236B  VAL*     1.3    57.7    +      -       +      +
    238B  ILE*     3.2     9.0    +      -       +      +
    239B  LYS*     2.9    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 236 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106B  TYR*     5.4     4.0    -      -       +      -
    177B  PHE*     3.7    48.0    -      -       +      -
    232B  LEU*     2.9    19.5    +      -       +      +
    233B  MET*     3.3    12.3    -      -       +      +
    235B  LEU*     1.3    75.9    -      -       +      +
    237B  PHE*     1.3    76.8    +      -       +      +
    239B  LYS*     3.2    16.3    +      -       -      +
    240B  TYR*     3.2    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 237 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    139B  MET*     5.8     9.0    -      -       +      -
    143B  ILE*     6.2     2.2    -      -       +      -
    233B  MET*     3.0    47.6    +      -       +      +
    234B  ALA*     2.9     9.0    +      -       -      +
    236B  VAL*     1.3    85.1    -      -       +      +
    238B  ILE*     1.3    63.6    +      -       -      +
    240B  TYR*     5.7     0.2    -      -       -      -
    241B  LEU*     3.4    49.4    +      -       +      +
    253B  ILE*     5.4     3.1    -      -       +      -
    387B  ILE*     5.2     3.1    -      -       +      -
    388B  PHE*     3.5    39.9    -      +       -      -
    391B  VAL*     3.5    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 238 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96B  VAL*     3.8    11.9    -      -       +      -
    100B  ILE*     3.6    37.5    -      -       +      -
    106B  TYR*     4.9    10.1    -      -       +      +
    234B  ALA      2.9    24.6    +      -       -      +
    235B  LEU*     3.4     8.7    -      -       +      +
    237B  PHE*     1.3    76.8    -      -       -      +
    239B  LYS*     1.3    66.0    -      -       -      +
    241B  LEU      3.8     1.9    +      -       -      +
    391B  VAL*     3.7    28.7    -      -       +      +
    394B  GLY*     3.8    19.1    -      -       -      +
    395B  LYS*     3.5    36.3    +      -       +      +
    398B  ALA*     5.0     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 239 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  PHE*     3.1    50.2    -      -       +      +
    106B  TYR*     3.4    39.3    -      -       +      +
    108B  ARG      2.8    13.5    +      -       -      +
    109B  LYS*     2.5    37.5    +      -       -      +
    110B  ASP*     4.2    13.2    -      -       -      +
    111B  GLY      4.4     5.1    +      -       -      -
    235B  LEU      2.9    12.7    +      -       -      +
    236B  VAL*     3.2    12.1    +      -       -      +
    238B  ILE*     1.3    80.3    -      -       -      +
    240B  TYR*     1.3    85.8    +      -       +      +
    241B  LEU      3.7     3.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 240 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243A  ASN*     4.7    13.2    +      -       -      -
    105B  PHE*     4.8     3.7    -      +       -      -
    110B  ASP      3.7    13.0    -      -       -      -
    111B  GLY      4.3    11.7    -      -       -      -
    112B  GLN*     4.6     6.1    -      -       +      -
    113B  LEU*     2.0    62.6    -      -       -      +
    114B  ILE*     3.6     5.4    +      -       -      +
    177B  PHE*     4.7    16.9    -      +       -      -
    180B  ILE*     5.5     5.4    -      -       -      +
    236B  VAL*     3.2    40.7    +      -       +      +
    237B  PHE      4.8     0.7    -      -       -      +
    239B  LYS*     1.3   106.2    -      -       +      +
    241B  LEU*     1.3    60.2    +      -       +      +
    242B  PRO*     3.9     0.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 241 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    110B  ASP*     5.8     1.9    -      -       -      -
    113B  LEU*     4.1     2.5    -      -       -      -
    114B  ILE*     4.5    18.4    -      -       +      -
    139B  MET*     5.8     6.3    -      -       +      -
    237B  PHE*     3.4    40.7    +      -       +      +
    238B  ILE      3.9     2.4    -      -       -      +
    239B  LYS      3.4     3.7    -      -       -      +
    240B  TYR*     1.3    84.2    -      -       +      +
    242B  PRO*     1.4    61.7    -      -       +      +
    245B  THR*     4.3    14.1    -      -       +      -
    246B  ALA*     3.9    18.8    -      -       +      -
    249B  ILE*     3.6    28.9    -      -       +      -
    391B  VAL*     5.7     6.3    -      -       +      -
    395B  LYS*     3.1    21.7    +      -       -      +
----------------------------------------------------------
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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