Contacts of the helix formed by residues 73 - 94 (chain D) in PDB entry 5HZZ


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 LEU 73 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     29B  PRO*     4.5     2.7    -      -       +      -
     30B  THR      3.8    37.7    -      -       -      +
     31B  PRO*     4.0     5.8    -      -       +      -
     32B  PRO*     3.8    23.1    -      -       +      -
     94B  LEU*     4.3    12.3    -      -       +      +
     96B  ILE*     4.0    25.5    -      -       +      +
    138B  ILE*     4.9     0.9    -      -       +      -
     58D  LEU*     4.1    20.4    -      -       +      -
     68D  LEU*     5.4     2.5    -      -       +      -
     69D  SER      4.1     6.7    -      -       -      +
     70D  ALA*     3.5    17.5    -      -       -      +
     71D  GLY      3.1     1.2    -      -       -      -
     72D  ASP*     1.3    79.5    -      -       +      +
     74D  ALA*     1.3    59.3    +      -       -      +
     75D  PRO      3.4     0.9    -      -       -      -
     76D  LEU*     3.3     9.0    +      -       +      +
     77D  ALA*     2.8    28.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 74 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134B  VAL*     3.5     6.1    -      -       +      +
    135B  ARG*     3.7    37.9    -      -       +      +
    138B  ILE*     4.0    18.6    -      -       +      +
     70D  ALA      4.2     1.6    +      -       -      -
     71D  GLY      3.2    14.3    +      -       -      +
     73D  LEU*     1.3    76.2    -      -       -      +
     75D  PRO*     1.3    66.4    -      -       +      +
     77D  ALA*     3.2     1.0    +      -       -      -
     78D  HIS*     2.9    30.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 75 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54D  GLU*     3.5    27.8    -      -       -      +
     71D  GLY      4.2     2.2    -      -       -      +
     72D  ASP*     3.6    17.0    -      -       -      +
     74D  ALA*     1.3    94.4    -      -       +      +
     76D  LEU*     1.3    61.5    +      -       -      +
     78D  HIS*     3.4     6.2    +      -       +      +
     79D  GLU*     3.1    28.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 76 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37B  LEU*     4.0    16.4    -      -       +      -
     94B  LEU*     4.0    23.8    -      -       +      -
     51D  VAL*     4.1    17.7    -      -       +      +
     54D  GLU*     3.9    15.7    -      -       +      +
     55D  ILE*     3.7    25.4    -      -       +      -
     58D  LEU*     3.8    31.6    -      -       +      -
     72D  ASP      5.1     0.4    +      -       -      -
     73D  LEU*     3.3     9.8    +      -       +      +
     75D  PRO*     1.3    78.4    -      -       -      +
     77D  ALA*     1.3    58.8    +      -       -      +
     79D  GLU*     3.2     1.3    +      -       -      +
     80D  LEU*     2.9    48.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 77 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  LEU*     4.1    17.6    -      -       +      +
     96B  ILE*     4.0    24.6    -      -       +      +
    101B  VAL*     3.7     7.4    -      -       +      +
    134B  VAL*     4.1    11.2    -      -       +      -
    138B  ILE*     4.3     7.6    -      -       +      -
     73D  LEU      2.8    20.0    +      -       -      +
     74D  ALA*     3.6     7.0    -      -       -      +
     76D  LEU*     1.3    74.4    -      -       -      +
     78D  HIS*     1.3    63.6    +      -       -      +
     80D  LEU*     3.3     2.5    +      -       -      +
     81D  ALA*     3.0    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 78 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101B  VAL*     4.5     2.9    -      -       -      -
    105B  VAL*     3.8    19.2    -      -       +      +
    129B  TRP*     6.3     0.7    -      +       -      -
    131B  PRO*     5.0     7.4    -      -       +      -
    132B  ALA*     4.1    30.0    +      -       +      +
    134B  VAL*     3.5    28.5    -      -       +      +
     74D  ALA      2.9    16.2    +      -       -      +
     75D  PRO*     3.5     8.5    -      -       +      +
     77D  ALA*     1.3    75.6    -      -       -      +
     79D  GLU*     1.3    64.8    +      -       +      +
     81D  ALA*     3.2     4.2    +      -       -      +
     82D  ASP*     3.0    41.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 79 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47D  ALA      4.6     1.4    -      -       -      +
     50D  GLU*     3.2    19.6    -      -       +      +
     51D  VAL*     3.3    31.1    -      -       +      +
     54D  GLU*     3.7    23.2    -      -       +      +
     75D  PRO*     3.1    17.7    +      -       +      +
     76D  LEU*     3.9     2.5    -      -       -      +
     78D  HIS*     1.3    80.5    -      -       -      +
     80D  LEU*     1.3    61.9    +      -       -      +
     82D  ASP*     3.2     7.0    +      -       -      +
     83D  LEU*     3.0    22.2    +      -       -      +
    203D   MN      2.5    34.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 80 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  LEU*     4.0    16.2    -      -       +      -
     87B  THR*     3.5    24.2    -      -       +      +
     90B  ALA*     4.2    15.9    -      -       +      -
     91B  LEU*     3.8    33.9    -      -       +      -
     94B  LEU*     4.1    12.6    -      -       +      -
     51D  VAL*     3.9    26.0    -      -       +      -
     55D  ILE*     5.9     0.4    -      -       +      -
     76D  LEU*     2.9    40.3    +      -       +      +
     77D  ALA      3.3     3.8    +      -       -      +
     79D  GLU*     1.3    76.5    -      -       -      +
     81D  ALA*     1.3    57.1    +      -       -      +
     83D  LEU*     3.2     5.2    +      -       +      +
     84D  LEU*     2.9    25.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 81 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     91B  LEU*     4.6     3.7    -      -       +      +
     98B  ALA      5.5     0.4    -      -       -      +
    101B  VAL*     3.6    22.2    -      -       +      -
    102B  PHE*     4.0    17.3    -      -       +      +
    105B  VAL*     3.9    14.5    -      -       +      +
     77D  ALA      3.0    16.9    +      -       -      +
     78D  HIS      3.2     4.7    +      -       -      +
     80D  LEU*     1.3    75.0    -      -       -      +
     82D  ASP*     1.3    59.5    +      -       -      +
     84D  LEU*     3.3    15.1    +      -       +      +
     85D  TYR*     2.8    28.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 82 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105B  VAL*     3.4    13.7    -      -       -      +
     47D  ALA*     4.3     5.2    -      -       +      -
     78D  HIS*     3.0    28.0    +      -       -      +
     79D  GLU*     3.2    12.8    -      -       -      +
     81D  ALA*     1.3    75.5    -      -       -      +
     83D  LEU*     1.3    63.4    +      -       -      +
     85D  TYR*     3.1     2.8    +      -       -      +
     86D  VAL*     3.0    28.4    +      -       -      +
    201D  UMP      2.6    40.8    +      -       -      +
    203D   MN      2.4    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 83 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     44B  LEU*     4.3    18.8    -      -       +      -
     48B  SER*     5.4     0.4    -      -       -      +
     83B  LEU*     4.5    10.1    -      -       +      -
     87B  THR*     3.7    26.7    -      -       +      +
     44D  LEU*     4.2    14.6    -      -       +      +
     47D  ALA*     3.9    20.3    -      -       +      +
     48D  SER*     3.8    25.1    -      -       -      +
     51D  VAL*     4.3    16.6    -      -       +      -
     79D  GLU      3.0    14.0    +      -       -      +
     80D  LEU*     3.2     8.9    +      -       +      +
     82D  ASP*     1.3    73.5    -      -       -      +
     84D  LEU*     1.3    65.7    +      -       -      +
     86D  VAL*     3.4     2.5    +      -       +      +
     87D  THR*     2.8    39.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 84 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     84B  LEU*     3.9    16.6    -      -       +      +
     87B  THR*     3.5    28.0    -      -       +      -
     88B  TYR*     3.8    47.3    -      -       +      +
     91B  LEU*     4.0    20.9    -      -       +      -
     98B  ALA*     4.4     4.0    -      -       +      +
    102B  PHE*     3.8    24.5    -      -       +      -
     10D  ASN*     5.0     0.4    -      -       -      +
     80D  LEU      2.9    15.5    +      -       -      +
     81D  ALA*     3.5    12.1    -      -       +      +
     83D  LEU*     1.3    75.0    -      -       -      +
     85D  TYR*     1.3    58.8    +      -       -      +
     87D  THR*     3.2     1.7    +      -       -      -
     88D  TYR*     2.8    37.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 85 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    102B  PHE*     3.4    32.8    -      +       -      -
    105B  VAL*     4.2     8.7    -      -       +      -
    106B  HIS*     2.7    44.6    +      -       +      -
    109B  ASN*     3.4    34.0    -      -       -      +
     14D  LEU*     3.6    30.6    -      -       +      +
     17D  PHE*     3.2    28.7    -      +       -      +
     81D  ALA      2.8    15.7    +      -       -      +
     82D  ASP      3.1     8.9    +      -       -      +
     84D  LEU*     1.3    73.7    -      -       -      +
     86D  VAL*     1.3    57.9    +      -       -      +
     88D  TYR      3.7     0.2    +      -       -      -
     89D  GLY*     2.9    24.1    +      -       -      -
    201D  UMP      3.4    34.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 86 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     40D  ARG*     3.2    16.2    +      -       -      +
     43D  LEU*     3.8    40.6    -      -       +      +
     44D  LEU*     4.0    21.1    -      -       +      +
     47D  ALA*     4.0    12.1    -      -       +      -
     82D  ASP      3.0    11.6    +      -       -      +
     83D  LEU*     3.5    10.1    -      -       +      +
     85D  TYR*     1.3    74.2    -      -       -      +
     87D  THR*     1.3    63.4    +      -       -      +
     89D  GLY      3.6     0.4    -      -       -      -
     90D  ALA*     3.1    24.4    +      -       -      +
    201D  UMP      3.5    35.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 87 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     80B  LEU*     3.3    43.9    -      -       +      +
     83B  LEU*     3.5    16.2    -      -       +      +
     84B  LEU*     3.6    21.8    -      -       +      +
     87B  THR*     5.5     0.3    +      -       -      -
     44D  LEU*     3.5    18.5    -      -       -      +
     83D  LEU*     2.8    21.9    +      -       -      +
     84D  LEU*     3.2     3.6    +      -       -      -
     86D  VAL*     1.3    74.0    -      -       -      +
     88D  TYR*     1.3    64.2    +      -       -      +
     90D  ALA*     3.2    12.5    +      -       -      +
     91D  LEU*     3.3    14.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 88 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     10B  ASN*     2.9    25.1    +      -       -      -
     84B  LEU*     3.8    21.9    -      -       +      +
     88B  TYR*     2.4    42.0    +      +       -      -
    102B  PHE*     3.9    17.7    -      +       -      -
     10D  ASN*     3.5    17.4    +      -       +      +
     11D  ALA*     3.7    27.5    -      -       +      -
     14D  LEU*     3.7    19.9    -      -       +      +
     84D  LEU*     2.8    29.3    +      -       +      +
     87D  THR*     1.3    72.6    -      -       -      +
     89D  GLY*     1.3    58.0    +      -       -      +
     91D  LEU*     3.2     7.6    +      -       -      +
     92D  ASP*     2.9    29.3    +      -       -      +
     98D  ALA*     3.5    26.0    -      -       +      +
     99D  ASP*     4.4     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 89 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14D  LEU*     3.5    23.6    -      -       -      -
     18D  HIS*     3.4     5.1    -      -       -      -
     40D  ARG*     3.5    16.2    -      -       -      -
     85D  TYR      2.9    13.8    +      -       -      -
     86D  VAL      3.5     0.2    +      -       -      -
     87D  THR      3.1     0.8    -      -       -      -
     88D  TYR*     1.3    76.8    -      -       -      +
     90D  ALA*     1.3    57.7    +      -       -      +
     92D  ASP*     3.4     0.6    +      -       -      -
     93D  GLN*     3.0    34.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 90 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     55B  ILE*     6.3     0.4    -      -       +      -
     76B  LEU*     6.3     0.2    -      -       +      -
     80B  LEU*     4.0    23.6    -      -       +      -
     40D  ARG*     3.5    34.4    -      -       +      +
     44D  LEU*     5.1     3.1    -      -       +      -
     86D  VAL      3.1    14.0    +      -       -      +
     87D  THR      3.2     8.7    +      -       -      +
     89D  GLY*     1.3    73.8    -      -       -      +
     91D  LEU*     1.3    65.2    +      -       -      +
     93D  GLN*     3.4     2.4    +      -       -      +
     94D  LEU*     3.1    30.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 91 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77B  ALA*     3.7    37.0    -      -       +      +
     80B  LEU*     3.8    26.7    -      -       +      -
     81B  ALA*     4.6     7.2    -      -       +      +
     84B  LEU*     4.2    17.0    -      -       +      -
     87D  THR      3.3     9.1    +      -       -      +
     88D  TYR*     3.2     7.6    +      -       -      +
     90D  ALA*     1.3    75.5    -      -       -      +
     92D  ASP*     1.3    64.0    +      -       -      +
     94D  LEU*     3.2    13.0    +      -       +      +
     96D  ILE*     3.0    47.8    +      -       +      +
     98D  ALA*     3.5    29.8    -      -       +      +
    101D  VAL*     5.1     3.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 92 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11D  ALA      4.5     4.2    -      -       -      +
     14D  LEU*     3.9     9.7    -      -       +      +
     15D  HIS*     3.5    27.0    +      -       -      +
     18D  HIS*     2.8    27.1    +      -       -      +
     25D  THR*     2.6    30.9    +      -       -      -
     26D  PRO*     3.6    10.2    -      -       -      +
     88D  TYR      2.9    16.3    +      -       -      +
     89D  GLY      3.8     4.7    -      -       -      +
     91D  LEU*     1.3    77.7    -      -       -      +
     93D  GLN*     1.3    57.8    +      -       -      +
     95D  GLY*     2.9    19.1    +      -       -      -
     96D  ILE      4.3     5.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 93 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     18D  HIS*     3.5    15.0    -      -       +      -
     23D  ALA*     3.8    10.4    -      -       -      +
     24D  ALA*     2.9    48.5    +      -       -      +
     26D  PRO*     3.4    14.6    -      -       -      +
     30D  THR*     4.9     1.9    -      -       -      +
     32D  PRO*     5.3     0.2    -      -       -      +
     36D  LEU*     3.6    39.2    -      -       +      +
     39D  LEU*     4.5     8.7    -      -       -      +
     40D  ARG*     3.0    32.2    +      -       -      +
     89D  GLY      3.0    20.3    +      -       -      +
     90D  ALA      4.0     3.1    -      -       -      +
     92D  ASP*     1.3    75.3    -      -       -      +
     94D  LEU*     1.3    60.0    +      -       -      +
     95D  GLY      3.1     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 94 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73B  LEU*     4.3    12.5    -      -       +      +
     76B  LEU*     3.9    24.7    -      -       +      -
     77B  ALA      5.2     0.7    -      -       -      +
     80B  LEU*     4.2    13.9    -      -       +      -
     26D  PRO*     4.6     1.6    -      -       -      -
     29D  PRO*     3.4     2.1    -      -       -      +
     30D  THR      2.9    30.4    +      -       -      +
     32D  PRO*     3.6    39.3    -      -       +      -
     36D  LEU*     4.4     8.3    -      -       +      -
     37D  LEU*     4.5     7.6    -      -       +      -
     40D  ARG*     6.3     0.2    -      -       +      -
     90D  ALA*     3.1    21.1    +      -       +      +
     91D  LEU*     3.2    10.5    +      -       +      +
     93D  GLN*     1.3    75.1    -      -       -      +
     95D  GLY*     1.3    60.9    +      -       -      +
     96D  ILE*     3.4    25.8    +      -       +      +
----------------------------------------------------------
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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