Contacts of the helix formed by residues 330 - 352 (chain A) in PDB entry 6DDE


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 LYS 330 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322A  HIS*     4.5    10.9    +      -       +      +
    328A  ASP*     2.6    22.7    +      -       +      +
    329A  THR*     1.3    76.6    -      -       -      +
    331A  ASN*     1.3    64.2    +      -       -      +
    332A  VAL*     3.3     3.8    -      -       -      +
    333A  GLN*     3.2    36.4    +      -       +      +
    334A  PHE*     3.3     7.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 331 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     49A  ILE*     5.6     0.2    -      -       +      -
     52A  GLN*     3.1    48.7    +      -       +      +
     53A  MET*     4.8     5.6    -      -       +      -
    267A  PHE*     4.1     8.7    -      -       +      -
    322A  HIS*     3.1    30.4    +      -       +      -
    324A  THR*     3.4    35.2    -      -       +      +
    325A  CYS      4.2     3.1    +      -       -      +
    328A  ASP      5.0     2.6    +      -       -      +
    329A  THR*     3.5     2.2    -      -       -      +
    330A  LYS*     1.3    80.0    +      -       -      +
    332A  VAL*     1.3    59.2    +      -       -      +
    334A  PHE*     3.0     7.1    +      -       -      +
    335A  VAL*     2.9    30.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 332 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52A  GLN      5.0     7.7    +      -       -      +
     53A  MET*     4.0    22.0    -      -       +      +
     54A  LYS*     5.4     1.8    -      -       +      +
    189A  PHE*     3.7    31.4    -      -       +      -
    191A  PHE*     3.7    39.4    -      -       +      -
    196A  PHE*     4.7     4.4    -      -       +      -
    329A  THR      4.6    13.7    -      -       -      +
    330A  LYS*     5.0     0.7    -      -       -      -
    331A  ASN*     1.3    75.3    -      -       -      +
    333A  GLN*     1.3    62.3    +      -       +      +
    335A  VAL*     3.6     8.6    -      -       +      +
    336A  PHE*     2.9    28.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 333 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  PHE*     3.2    29.1    -      -       +      -
    192A  LYS*     5.3     7.8    -      -       -      +
    330A  LYS*     3.2    35.1    +      -       +      +
    331A  ASN      3.2     0.2    -      -       -      -
    332A  VAL*     1.3    83.5    -      -       +      +
    334A  PHE*     1.3    56.8    +      -       -      +
    336A  PHE*     3.4    18.5    +      -       -      +
    337A  ASP*     2.9    31.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 334 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    265A  ILE*     4.0     9.2    -      -       +      -
    267A  PHE*     3.8    12.1    -      +       +      -
    320A  TYR*     3.6    32.5    -      +       +      -
    321A  THR      3.3    39.9    -      -       -      -
    322A  HIS*     3.5    37.7    -      +       +      +
    330A  LYS      3.3     5.1    +      -       -      +
    331A  ASN*     3.0     9.9    +      -       -      +
    333A  GLN*     1.3    75.4    -      -       -      +
    335A  VAL*     1.3    60.9    +      -       -      +
    337A  ASP*     3.3    13.5    +      -       +      +
    338A  ALA*     3.0    27.3    +      -       +      +
    263R  ARG*     5.9     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 335 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     36A  LEU*     3.8    27.1    -      -       +      -
     53A  MET*     3.8    19.1    -      -       +      -
    189A  PHE*     5.2     0.4    -      -       +      -
    196A  PHE*     3.6    22.2    -      -       +      -
    198A  MET*     4.0     8.3    -      -       +      -
    222A  ILE*     4.1     6.3    -      -       +      -
    265A  ILE*     4.8     7.9    -      -       +      -
    267A  PHE*     3.6    23.1    -      -       +      -
    331A  ASN      2.9    18.6    +      -       -      +
    332A  VAL*     3.6    10.8    -      -       +      +
    334A  PHE*     1.3    76.8    -      -       -      +
    336A  PHE*     1.3    55.2    +      -       -      +
    338A  ALA*     3.4     1.4    +      -       -      +
    339A  VAL*     2.9    34.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 336 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    191A  PHE*     3.7    26.9    -      +       +      -
    192A  LYS*     3.6    54.7    -      -       +      -
    194A  LEU*     3.9    17.9    -      -       +      -
    196A  PHE*     4.0    11.4    -      +       +      -
    332A  VAL      2.9    17.9    +      -       -      +
    333A  GLN*     3.6    19.7    -      -       -      +
    335A  VAL*     1.3    76.4    -      -       -      +
    337A  ASP*     1.3    56.5    +      -       -      +
    339A  VAL*     3.9     0.3    -      -       -      +
    340A  THR*     2.6    49.6    +      -       +      -
    173R  VAL*     3.7    29.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 337 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333A  GLN*     2.9    21.9    +      -       +      +
    334A  PHE*     3.6    17.7    -      -       +      +
    336A  PHE*     1.3    79.9    -      -       -      +
    338A  ALA*     1.3    56.6    +      -       -      +
    340A  THR*     3.4     6.9    +      -       -      +
    341A  ASP*     2.9    28.9    +      -       -      +
    258R  ARG*     5.9     1.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 338 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220A  ALA*     5.8     1.1    -      -       +      -
    263A  SER*     5.9     0.2    -      -       -      +
    265A  ILE*     3.7    21.1    -      -       +      -
    320A  TYR*     3.7    38.3    -      -       +      -
    334A  PHE*     3.0    18.5    +      -       +      +
    335A  VAL      4.0     0.2    -      -       -      +
    337A  ASP*     1.3    77.0    -      -       -      +
    339A  VAL*     1.3    59.2    +      -       -      +
    341A  ASP*     3.2     7.2    +      -       -      +
    342A  VAL*     2.9    34.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 339 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  VAL*     3.8    14.1    -      -       +      -
     36A  LEU*     3.8    36.1    -      -       +      -
    194A  LEU*     4.2     3.1    -      -       +      -
    196A  PHE*     3.7    26.0    -      -       +      -
    219A  THR*     4.3     5.8    -      -       +      +
    220A  ALA*     4.3    10.5    -      -       +      -
    265A  ILE*     5.2     0.7    -      -       +      -
    335A  VAL      2.9    21.5    +      -       -      +
    336A  PHE      4.1     2.5    -      -       -      +
    338A  ALA*     1.3    74.8    -      -       -      +
    340A  THR*     1.3    58.2    +      -       -      +
    342A  VAL*     3.3     5.4    +      -       -      +
    343A  ILE*     2.8    51.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 340 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194A  LEU*     5.1     1.0    -      -       -      +
    336A  PHE*     2.6    48.3    +      -       +      -
    337A  ASP*     3.6     8.3    -      -       -      +
    339A  VAL*     1.3    76.8    -      -       -      +
    341A  ASP*     1.3    57.3    +      -       -      +
    343A  ILE*     3.2     9.8    +      -       -      +
    344A  ILE*     3.0    39.5    +      -       +      +
    172R  PRO*     3.8    28.4    -      -       +      +
    173R  VAL*     4.3     6.6    -      -       +      +
    258R  ARG*     4.6     8.3    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 341 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320A  TYR*     2.3    33.8    +      -       +      +
    337A  ASP*     2.9    19.9    +      -       -      +
    338A  ALA*     3.2     4.5    +      -       -      +
    340A  THR*     1.3    76.5    -      -       -      +
    342A  VAL*     1.3    60.9    +      -       -      +
    344A  ILE*     3.8    11.8    +      -       -      +
    345A  LYS*     3.5    18.0    +      -       -      +
    258R  ARG*     5.8     1.0    +      -       -      +
    262R  VAL*     3.3    28.4    -      -       -      +
    263R  ARG*     3.7    10.2    +      -       -      +
    264R  MET*     3.7    20.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 342 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  THR*     3.6    36.1    -      -       +      +
    220A  ALA*     5.5     1.3    -      -       +      -
    262A  THR*     6.2     0.4    -      -       -      -
    263A  SER*     3.3    31.2    -      -       -      +
    320A  TYR*     4.6     8.3    -      -       +      +
    338A  ALA*     2.9    17.7    +      -       +      +
    339A  VAL*     3.9     3.6    -      -       -      +
    340A  THR      3.2     0.2    -      -       -      -
    341A  ASP*     1.3    79.0    -      -       -      +
    343A  ILE*     1.3    59.6    +      -       -      +
    344A  ILE      3.2     0.4    -      -       -      -
    345A  LYS*     3.2    23.4    +      -       -      +
    346A  ASN*     2.8    30.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 343 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     34A  VAL*     5.0     4.7    -      -       +      -
    194A  LEU*     4.3    11.0    -      -       +      -
    219A  THR*     4.8     8.3    -      -       +      +
    339A  VAL*     2.8    41.2    +      -       +      +
    340A  THR*     3.7     8.1    -      -       -      +
    342A  VAL*     1.3    73.2    -      -       -      +
    344A  ILE*     1.3    61.1    +      -       -      +
    346A  ASN*     3.7     6.9    -      -       +      +
    347A  ASN*     2.9    51.8    +      -       -      +
    172R  PRO*     3.7    26.7    -      -       +      +
    173R  VAL*     5.6     2.0    -      -       +      -
    176R  LEU*     3.7    35.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 344 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340A  THR*     3.0    22.5    +      -       +      +
    341A  ASP*     3.8    14.1    -      -       -      +
    342A  VAL      3.2     0.2    -      -       -      -
    343A  ILE*     1.3    76.6    -      -       -      +
    345A  LYS*     1.3    58.1    +      -       -      +
    347A  ASN*     3.3     1.7    +      -       -      +
    348A  LEU*     2.9    35.7    +      -       +      +
    168R  ALA      4.5     6.6    -      -       -      +
    169R  VAL*     3.8    19.3    -      -       +      +
    172R  PRO*     3.7    20.4    -      -       +      -
    258R  ARG*     3.5    37.2    -      -       +      +
    259R  LEU*     4.0    26.7    -      -       +      -
    262R  VAL*     4.3    14.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 345 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261A  ASP*     2.9    43.4    +      -       -      -
    262A  THR*     5.3     1.4    -      -       -      +
    263A  SER*     5.4     2.6    -      -       -      +
    316A  THR      4.6     2.6    +      -       -      -
    341A  ASP      3.5    10.1    +      -       -      +
    342A  VAL*     3.2    26.9    +      -       -      +
    344A  ILE*     1.3    79.9    -      -       -      +
    346A  ASN*     1.3    59.8    +      -       -      +
    348A  LEU*     3.4    10.0    +      -       +      +
    349A  LYS*     2.9    33.6    +      -       -      +
    354A  PHE*     3.9    30.1    -      -       +      +
    264R  MET*     4.0    41.1    -      -       +      -
    265R  LEU*     5.5     3.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 346 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219A  THR*     5.3     5.9    +      -       -      +
    342A  VAL*     2.8    21.9    +      -       +      +
    343A  ILE*     3.7    10.4    -      -       +      +
    345A  LYS*     1.3    81.6    -      -       -      +
    347A  ASN*     1.3    60.0    +      -       -      +
    349A  LYS*     3.3    13.3    +      -       -      +
    350A  ASP*     2.9    28.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 347 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343A  ILE*     2.9    41.3    +      -       -      +
    344A  ILE      3.9     0.4    -      -       -      +
    346A  ASN*     1.3    75.3    -      -       -      +
    348A  LEU*     1.3    62.2    +      -       -      +
    350A  ASP*     4.0     6.1    -      -       -      +
    351A  CYS*     2.9    31.9    +      -       -      +
    168R  ALA*     3.4    37.9    +      -       +      +
    172R  PRO*     4.7     0.4    -      -       -      +
    175R  ALA*     4.1    16.4    -      -       -      +
    176R  LEU*     5.1     8.6    -      -       -      +
    179R  ARG*     3.3    21.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 348 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    344A  ILE*     2.9    27.0    +      -       +      +
    345A  LYS*     3.8     7.4    -      -       -      +
    347A  ASN*     1.3    77.7    -      -       -      +
    349A  LYS*     1.3    58.0    +      -       -      +
    351A  CYS*     4.5     2.9    -      -       +      -
    352A  GLY      3.0     7.4    +      -       -      -
    353A  LEU*     3.0    44.1    +      -       +      -
    354A  PHE*     3.0    41.7    +      -       -      +
    168R  ALA*     6.4     0.2    -      -       +      -
    169R  VAL*     3.7    26.0    -      -       +      -
    259R  LEU*     3.8    33.4    -      -       +      -
    265R  LEU*     4.9     8.1    -      -       +      -
    278R  ILE*     4.4     3.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 349 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    261A  ASP*     3.0    39.8    +      -       -      -
    345A  LYS*     2.9    22.5    +      -       -      +
    346A  ASN*     3.6    13.7    -      -       -      +
    348A  LEU*     1.3    77.5    -      -       -      +
    350A  ASP*     1.3    61.9    +      -       -      +
    352A  GLY*     3.6     9.5    +      -       -      -
    354A  PHE*     3.6    38.3    -      -       +      +
    341R  GLU*     6.1     1.2    -      -       -      +
    342R  ASN*     5.1     5.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 350 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    346A  ASN*     2.9    21.1    +      -       -      +
    347A  ASN*     4.0     7.6    -      -       -      +
    349A  LYS*     1.3    78.0    -      -       -      +
    351A  CYS*     1.3    62.1    +      -       -      +
    101R  THR*     4.7    18.3    +      -       -      +
    103R  THR*     3.5    14.5    +      -       -      +
    179R  ARG*     5.0     9.6    -      -       -      +
    342R  ASN*     4.6     7.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 351 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    347A  ASN      2.9    20.2    +      -       -      +
    348A  LEU*     4.1     5.6    -      -       +      +
    350A  ASP*     1.3    76.8    -      -       -      +
    352A  GLY*     1.3    58.2    +      -       -      +
    353A  LEU*     4.6     9.9    -      -       +      +
    103R  THR*     3.4    34.4    -      -       -      +
    107R  ILE*     5.4     0.9    -      -       -      +
    161R  MET*     5.8     1.6    -      -       -      -
    164R  ASP*     4.9     5.6    -      -       -      -
    165R  ARG*     3.5    49.0    +      -       -      -
    168R  ALA*     5.7     3.1    -      -       +      -
    179R  ARG*     4.5     6.9    -      -       -      +
    340R  ASP*     4.9     5.2    -      -       -      +
    342R  ASN*     4.6     3.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 352 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    348A  LEU      3.0     5.4    +      -       -      -
    349A  LYS      3.6     7.1    +      -       -      -
    350A  ASP      3.4     2.6    -      -       -      -
    351A  CYS*     1.3    78.1    -      -       -      +
    353A  LEU*     1.3    67.8    +      -       -      +
    354A  PHE*     3.7     2.4    -      -       -      +
    277R  ARG*     4.8     2.9    +      -       -      -
    281R  MET*     5.3     0.2    -      -       -      +
    339R  LEU      4.7     1.0    -      -       -      +
    340R  ASP*     3.3    35.0    -      -       -      +
    341R  GLU*     4.3     9.6    +      -       -      +
    342R  ASN*     4.2    12.6    -      -       -      -
----------------------------------------------------------
 Back to top of page


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