Contacts of the helix formed by residues 198 - 224 (chain R) in PDB entry 6VMS


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 PHE 198 (chain R).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122R  ILE*     4.3    13.1    -      -       +      +
    194R  SER      3.4    11.3    +      -       -      +
    196R  VAL      3.4     0.8    -      -       -      -
    197R  SER*     1.3    80.8    -      -       -      +
    199R  TYR*     1.3    84.7    +      +       -      +
    200R  VAL      3.4     1.1    -      -       -      -
    201R  PRO*     3.4     3.6    -      -       -      +
    202R  PHE*     2.6    52.3    +      +       +      +
    382R  PHE*     4.1    17.0    -      +       -      -
    383R  ILE*     5.7     0.7    -      -       -      -
    386R  TRP*     3.9    20.4    -      -       +      -
    387R  LEU*     3.3    43.3    -      -       +      -
    390R  PHE*     3.3    46.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with TYR 199 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194R  SER*     2.9    46.9    +      -       -      -
    195R  ILE*     3.4    23.0    +      -       +      +
    198R  PHE*     1.3    99.2    -      +       -      +
    200R  VAL*     1.3    62.0    +      -       -      +
    202R  PHE*     3.5    11.5    -      +       -      +
    203R  ILE*     2.9    38.4    +      -       +      +
    387R  LEU*     5.2     4.3    -      -       +      -
    390R  PHE*     3.4    14.9    +      -       +      +
    391R  ILE*     4.4     7.1    +      -       +      +
    394R  ILE*     3.4    36.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 200 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195R  ILE*     3.0    34.5    +      -       +      +
    196R  VAL*     4.3     7.2    -      -       +      +
    199R  TYR*     1.3    75.7    -      -       -      +
    201R  PRO*     1.3    69.0    -      -       +      +
    203R  ILE*     3.2     6.9    +      -       -      +
    204R  VAL*     2.9    40.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 201 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122R  ILE*     3.7    17.7    -      -       +      -
    123R  LEU*     4.1    11.4    -      -       +      -
    126R  CYS*     4.0    22.7    -      -       +      -
    196R  VAL      3.3    16.6    -      -       -      +
    197R  SER      3.4    25.8    -      -       -      +
    198R  PHE      3.4     8.3    -      -       -      +
    200R  VAL*     1.3    99.2    -      -       +      +
    202R  PHE*     1.3    54.8    +      -       -      -
    204R  VAL*     4.2     7.2    -      -       +      -
    205R  ILE*     2.9    38.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 202 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    198R  PHE*     2.6    44.4    +      +       +      +
    199R  TYR*     3.5    14.6    -      +       -      +
    201R  PRO*     1.3    71.6    -      -       -      +
    203R  ILE*     1.3    83.9    +      -       +      +
    205R  ILE*     3.9     1.3    -      -       -      +
    206R  LEU*     2.9    43.2    +      -       +      +
    379R  LEU*     5.6     1.0    -      -       +      +
    382R  PHE*     4.0    27.1    -      +       +      -
    383R  ILE*     3.4    38.1    -      -       +      -
    387R  LEU*     4.9    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 203 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    199R  TYR*     2.9    24.3    +      -       +      +
    200R  VAL*     3.8     4.9    -      -       -      +
    202R  PHE*     1.3    93.0    -      -       +      +
    204R  VAL*     1.3    64.9    +      -       +      +
    206R  LEU*     3.8     9.6    -      -       +      +
    207R  LEU*     2.9    48.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 204 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    126R  CYS*     3.4    28.3    -      -       -      +
    129R  SER*     6.0     0.4    -      -       -      -
    130R  ILE*     4.5    12.1    -      -       +      -
    200R  VAL*     2.9    31.1    +      -       +      +
    201R  PRO*     3.8     4.9    -      -       +      +
    202R  PHE      3.2     0.2    -      -       -      -
    203R  ILE*     1.3    79.5    -      -       +      +
    205R  ILE*     1.3    57.7    +      -       -      +
    207R  LEU*     3.9     4.8    -      -       -      +
    208R  VAL*     2.9    47.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 205 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122R  ILE      4.4     3.4    -      -       -      +
    125R  LEU*     3.9    14.1    -      -       +      +
    126R  CYS*     3.7    39.3    -      -       +      +
    129R  SER*     3.9     8.1    -      -       -      +
    201R  PRO*     2.9    24.6    +      -       +      +
    202R  PHE*     3.9     3.1    -      -       -      +
    204R  VAL*     1.3    75.1    -      -       -      +
    206R  LEU*     1.3    64.8    +      -       -      +
    208R  VAL*     3.9     4.4    -      -       -      +
    209R  TYR*     2.9    53.8    +      -       +      -
    378R  TYR      5.6     1.1    -      -       -      +
    379R  LEU*     3.6    13.2    -      -       +      -
    382R  PHE*     4.5    24.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 206 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202R  PHE*     2.9    41.1    +      -       +      +
    203R  ILE*     3.8    11.2    -      -       +      +
    205R  ILE*     1.3    78.6    -      -       -      +
    207R  LEU*     1.3    62.7    +      -       +      +
    209R  TYR*     3.9     1.2    -      -       -      +
    210R  ILE*     2.9    52.4    +      -       +      +
    379R  LEU*     3.9    29.4    -      -       +      +
    383R  ILE*     5.3     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 207 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    203R  ILE*     2.9    41.6    +      -       +      +
    204R  VAL*     4.0     4.9    -      -       -      +
    206R  LEU*     1.3    81.3    -      -       +      +
    208R  VAL*     1.3    60.0    +      -       +      +
    210R  ILE*     3.3    16.6    +      -       +      +
    211R  LYS*     2.9    40.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 208 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129R  SER*     3.1    42.0    -      -       -      +
    130R  ILE*     5.1     5.4    -      -       +      -
    133R  TYR*     3.8    23.3    -      -       +      -
    204R  VAL*     2.9    35.6    +      -       +      +
    205R  ILE      3.9     2.5    -      -       -      +
    207R  LEU*     1.3    78.4    -      -       +      +
    209R  TYR*     1.3    59.3    +      -       -      +
    211R  LYS*     3.2    10.1    +      -       +      +
    212R  ILE*     2.9    34.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 209 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125R  LEU      4.9     0.7    +      -       -      -
    128R  ILE*     4.9     1.0    -      -       -      +
    129R  SER*     2.9    31.5    +      -       -      -
    132R  ARG*     3.6    31.8    +      -       -      -
    205R  ILE*     2.9    40.1    +      -       +      +
    206R  LEU      4.1     0.2    -      -       -      +
    208R  VAL*     1.3    76.2    -      -       -      +
    210R  ILE*     1.3    58.8    +      -       -      +
    212R  ILE*     3.7    10.3    -      -       +      +
    213R  TYR*     2.9    28.8    +      -       -      +
    375R  LEU*     3.2    38.6    -      -       +      +
    378R  TYR*     3.6    31.0    -      +       +      +
    379R  LEU*     3.7    29.4    -      -       +      -
    426R  TYR*     4.1     7.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 210 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206R  LEU*     2.9    51.0    +      -       +      +
    207R  LEU*     3.6    16.4    -      -       +      +
    208R  VAL      3.2     0.2    -      -       -      -
    209R  TYR*     1.3    76.9    -      -       +      +
    211R  LYS*     1.3    62.8    +      -       +      +
    213R  TYR*     3.3     7.5    +      -       +      +
    214R  ILE*     2.9    45.1    +      -       +      +
    379R  LEU*     5.6     2.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 211 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133R  TYR*     3.7    41.3    +      -       +      +
    207R  LEU*     2.9    25.9    +      -       -      +
    208R  VAL*     3.6     7.6    -      -       +      +
    210R  ILE*     1.3    77.6    -      -       +      +
    212R  ILE*     1.3    58.8    +      -       -      +
    214R  ILE*     3.2    13.4    +      -       +      +
    215R  VAL*     2.9    36.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 212 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    353A  LEU*     4.3     9.2    -      -       +      -
    132R  ARG*     3.7    33.0    -      -       +      +
    133R  TYR*     3.8    16.2    -      -       +      +
    136R  VAL*     3.9    22.4    -      -       +      -
    208R  VAL*     2.9    28.0    +      -       +      +
    209R  TYR*     3.7    16.8    -      -       +      +
    210R  ILE      3.2     0.2    -      -       -      -
    211R  LYS*     1.3    74.1    -      -       -      +
    213R  TYR*     1.3    66.0    +      -       -      +
    215R  VAL*     3.2     6.2    +      -       -      +
    216R  LEU*     2.9    42.0    +      -       +      +
    375R  LEU*     3.8    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 213 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209R  TYR      2.9    17.5    +      -       -      +
    210R  ILE*     3.7     7.2    -      -       +      +
    212R  ILE*     1.3    77.3    -      -       -      +
    214R  ILE*     1.3    70.8    +      -       +      +
    216R  LEU*     3.9     3.8    -      -       +      -
    217R  ARG*     2.9    56.2    +      -       +      +
    220R  ARG*     5.8     1.8    -      -       -      -
    372R  THR*     3.4    41.8    +      -       +      +
    375R  LEU*     4.3    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 214 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210R  ILE*     2.9    38.0    +      -       +      +
    211R  LYS*     3.5    15.0    -      -       +      +
    213R  TYR*     1.3    83.5    -      -       +      +
    215R  VAL*     1.3    66.4    +      -       +      +
    217R  ARG*     4.0     2.6    -      -       -      +
    218R  ARG*     2.9    43.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 215 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344A  ILE*     5.9     1.3    -      -       +      -
    133R  TYR*     6.2     1.6    -      -       +      -
    136R  VAL*     4.6    32.5    -      -       +      +
    137R  ALA*     5.7     6.1    -      -       +      -
    211R  LYS*     2.9    23.3    +      -       +      +
    212R  ILE*     3.2     6.7    +      -       -      +
    214R  ILE*     1.3    80.2    -      -       +      +
    216R  LEU*     1.3    66.5    +      -       +      +
    218R  ARG*     3.8    23.5    -      -       -      +
    219R  ARG*     2.9    49.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 216 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344A  ILE*     5.3     3.6    -      -       +      -
    348A  LEU*     3.7    32.3    -      -       +      -
    353A  LEU*     5.2     6.1    -      -       +      -
    136R  VAL*     5.1     4.0    -      -       +      -
    212R  ILE*     2.9    38.0    +      -       +      +
    213R  TYR*     3.9     4.9    -      -       +      +
    215R  VAL*     1.3    82.3    -      -       +      +
    217R  ARG*     1.3    58.4    +      -       -      +
    219R  ARG*     3.9     6.4    -      -       -      +
    220R  ARG*     2.9    57.9    +      -       -      +
    367R  LYS*     4.5     2.9    -      -       -      +
    371R  ALA*     3.7    28.0    -      -       +      -
    375R  LEU*     4.0    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 217 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    213R  TYR*     2.9    52.7    +      -       +      +
    214R  ILE*     4.0     2.9    -      -       -      +
    216R  LEU*     1.3    73.0    -      -       -      +
    218R  ARG*     1.3    61.0    +      -       -      +
    220R  ARG*     4.2    20.8    -      -       -      +
    221R  LYS*     2.8    76.5    +      -       -      +
    368R  GLU*     3.0    37.5    -      -       -      +
    372R  THR*     5.5     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 218 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    214R  ILE*     2.9    32.4    +      -       +      +
    215R  VAL*     3.8    27.3    +      -       -      +
    217R  ARG*     1.3    75.0    -      -       -      +
    219R  ARG*     1.3    69.1    +      -       +      +
    221R  LYS*     3.3     8.4    +      -       -      +
    222R  LEU*     3.1    44.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 219 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337A  ASP*     4.4     6.7    +      -       -      -
    340A  THR*     3.9    15.6    -      -       -      +
    341A  ASP*     2.3    32.1    +      -       -      -
    344A  ILE*     3.3    38.4    -      -       -      +
    215R  VAL*     2.9    39.6    +      -       +      +
    216R  LEU*     3.9     7.6    -      -       +      +
    218R  ARG*     1.3    83.0    -      -       +      +
    220R  ARG*     1.3    59.7    +      -       +      +
    222R  LEU*     2.8    22.0    +      -       -      +
    223R  VAL*     2.9    22.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 220 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    345A  LYS*     5.1     8.0    -      -       -      +
    213R  TYR*     5.8     1.4    -      -       -      -
    216R  LEU*     2.9    50.1    +      -       -      +
    217R  ARG*     4.2    21.6    -      -       -      +
    219R  ARG*     1.3    71.5    -      -       +      +
    221R  LYS*     1.3    60.4    +      -       -      +
    222R  LEU      2.9    10.7    +      -       -      -
    223R  VAL*     3.1    33.6    +      -       +      +
    224R  ASN      4.5     0.7    +      -       -      -
    364R  SER*     4.5    21.1    -      -       -      +
    367R  LYS*     2.9    58.6    +      -       -      +
    368R  GLU*     3.6    23.8    +      -       -      +
    371R  ALA*     4.2     5.1    -      -       -      +
    372R  THR*     4.3     6.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 221 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    217R  ARG*     2.8    64.9    +      -       -      +
    218R  ARG*     3.9     6.7    -      -       -      +
    220R  ARG*     1.3    74.6    -      -       -      +
    222R  LEU*     1.3    70.8    +      -       +      +
    224R  ASN*     5.2     1.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 222 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    218R  ARG*     3.2    31.9    -      -       +      +
    219R  ARG*     2.8     9.0    +      -       -      +
    221R  LYS*     1.3    90.2    -      -       +      +
    223R  VAL*     1.3    61.2    +      -       -      +
    224R  ASN*     3.3    19.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 223 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341A  ASP*     5.2    12.8    -      -       -      +
    345A  LYS*     5.7     5.8    -      -       -      +
    219R  ARG*     2.9    27.9    +      -       +      +
    220R  ARG*     3.1    28.7    +      -       +      +
    222R  LEU*     1.3    76.2    -      -       -      +
    224R  ASN*     1.3    73.5    +      -       -      +
    225R  THR*     3.2    39.6    +      -       +      +
    364R  SER*     4.5     5.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 224 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220R  ARG      4.5     1.4    +      -       -      -
    221R  LYS      5.2     1.6    -      -       -      +
    222R  LEU*     3.3    18.5    +      -       -      +
    223R  VAL*     1.3    80.2    +      -       -      +
    225R  THR*     1.3    62.4    +      -       -      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il