Contacts of the helix formed by residues 564 - 585 (chain D) in PDB entry 6NYY


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 GLN 564 (chain D).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    562D  VAL*     5.8     4.6    +      -       -      +
    563D  LEU*     1.3    76.3    -      -       -      +
    565D  PRO*     1.3    75.4    -      -       +      +
    566D  GLU*     3.2     4.5    -      -       +      +
    567D  GLU*     2.8    52.2    +      -       +      +
    568D  LYS*     2.8    14.2    +      -       -      +
    480E  ILE*     6.0     0.4    -      -       -      +
    612E  GLU*     4.6    14.8    +      -       -      +
    753E  LYS*     3.6    25.4    +      -       -      +
    758E  GLU      5.0     0.7    -      -       -      +
    759E  PHE*     3.4    26.2    +      -       -      +
    760E  VAL*     5.4     0.6    -      -       -      +
    761E  GLU*     5.3     2.1    +      -       -      +
    762E  GLY      5.0     6.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 565 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    564D  GLN*     1.3    96.1    -      -       +      +
    566D  GLU*     1.3    64.1    +      -       +      +
    568D  LYS*     4.2     9.2    -      -       +      +
    569D  LYS*     3.6    20.6    +      -       -      +
    753E  LYS*     5.8     0.9    -      -       -      +
    761E  GLU*     4.3     9.4    -      -       +      +
    762E  GLY*     4.1    24.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 566 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    564D  GLN*     3.2     5.1    -      -       +      +
    565D  PRO*     1.3    82.4    -      -       +      +
    567D  GLU*     1.3    61.1    +      -       +      +
    569D  LYS*     4.1    25.4    +      -       -      +
    570D  THR*     2.9    21.7    +      -       -      -
    639D  PHE*     5.6     2.3    -      -       -      -
    641D  ARG*     5.3     6.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 567 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    563D  LEU*     3.4    26.0    -      -       +      +
    564D  GLN*     2.8    40.1    +      -       +      +
    566D  GLU*     1.3    79.2    -      -       +      +
    568D  LYS*     1.3    59.7    +      -       -      +
    569D  LYS      3.2     1.3    -      -       -      -
    570D  THR*     3.0     8.2    +      -       -      -
    571D  VAL*     2.9    32.8    +      -       -      +
    603D  LEU*     6.1     0.9    -      -       +      -
    612E  GLU      3.5     6.9    -      -       -      +
    613E  GLN*     3.3    37.3    -      -       +      +
    614E  TYR*     4.3     9.0    -      -       -      +
    615E  LEU*     5.0    13.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 568 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    562D  VAL*     5.2     3.9    -      -       -      +
    563D  LEU*     3.8    44.6    +      -       +      +
    564D  GLN      2.8    16.2    +      -       -      +
    565D  PRO*     4.7     7.2    -      -       +      +
    567D  GLU*     1.3    72.1    -      -       -      +
    569D  LYS*     1.3    56.9    +      -       -      +
    571D  VAL*     4.2     6.6    -      -       -      +
    572D  ALA*     3.0    32.2    +      -       -      +
    596D  ILE*     4.8    22.7    -      -       +      +
    731D  LEU*     3.4    18.8    -      -       +      +
    734D  GLU*     5.5     6.3    +      -       -      +
    762E  GLY*     4.2    17.6    +      -       -      +
    763E  THR*     4.3    13.5    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 569 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    565D  PRO      3.6    17.9    +      -       -      +
    566D  GLU*     4.2    27.8    +      -       -      +
    567D  GLU      3.2     1.0    -      -       -      -
    568D  LYS*     1.3    76.9    -      -       -      +
    570D  THR*     1.3    60.6    +      -       -      +
    572D  ALA*     4.4     0.5    -      -       -      +
    573D  TYR*     3.3    50.8    +      -       +      -
    639D  PHE*     4.0    17.6    -      -       +      -
    731D  LEU*     4.2    21.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 570 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    566D  GLU      2.9    17.4    +      -       -      -
    567D  GLU*     3.0     9.2    +      -       -      -
    569D  LYS*     1.3    77.4    -      -       -      +
    571D  VAL*     1.3    59.9    +      -       -      +
    573D  TYR*     3.4     3.3    +      -       -      +
    574D  HIS*     3.0    26.7    +      -       -      +
    635D  GLU*     3.5    21.7    -      -       +      +
    639D  PHE*     3.2    28.5    -      -       +      -
    641D  ARG*     5.8     0.5    +      -       -      -
    643D  THR*     4.0    13.2    -      -       +      -
    615E  LEU*     3.7    21.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 571 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    563D  LEU*     4.0    10.3    -      -       +      -
    567D  GLU      2.9    19.1    +      -       -      +
    568D  LYS*     4.2     5.8    -      -       -      +
    570D  THR*     1.3    76.7    -      -       -      +
    572D  ALA*     1.3    57.3    +      -       -      +
    574D  HIS*     3.2     6.1    +      -       -      +
    575D  GLN*     2.9    32.8    +      -       +      +
    596D  ILE*     4.3    13.0    -      -       +      +
    603D  LEU*     3.8    25.4    -      -       +      +
    604D  GLY*     3.7    31.9    -      -       -      +
    615E  LEU*     3.8    20.2    -      -       +      -
      6J  ALA*     4.7     6.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 572 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    568D  LYS      3.0    19.7    +      -       -      +
    569D  LYS      4.4     2.9    -      -       -      +
    571D  VAL*     1.3    77.5    -      -       -      +
    573D  TYR*     1.3    57.8    +      -       +      +
    576D  ALA*     3.0    30.3    +      -       -      +
    596D  ILE*     3.8    19.7    -      -       +      +
    727D  ALA*     3.3    22.9    -      -       +      +
    730D  LEU*     3.8     5.8    -      -       +      +
    731D  LEU*     3.8    19.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 573 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    569D  LYS*     3.3    38.0    +      -       +      +
    570D  THR*     3.4     5.9    +      -       -      +
    571D  VAL      3.3     0.2    -      -       -      -
    572D  ALA*     1.3    75.5    -      -       +      +
    574D  HIS*     1.3    63.5    +      -       -      +
    576D  ALA*     4.2     1.5    -      -       -      -
    577D  GLY      3.4     5.5    +      -       -      -
    634D  SER*     2.8    27.9    +      -       -      +
    635D  GLU*     4.8    10.3    -      -       +      -
    638D  PHE*     3.5    45.3    -      +       +      -
    639D  PHE*     3.4    31.6    -      +       +      -
    723D  VAL*     5.0     0.7    -      -       +      -
    724D  GLU*     4.5    21.8    +      -       +      +
    727D  ALA*     3.5    25.4    -      -       +      -
    728D  LEU*     4.9    11.5    -      -       +      +
    731D  LEU*     6.1     3.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 574 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    570D  THR      3.0    16.7    +      -       -      +
    571D  VAL*     3.2     8.9    +      -       -      +
    573D  TYR*     1.3    78.7    -      -       -      +
    575D  GLN*     1.3    65.4    +      -       -      +
    577D  GLY      3.2     9.7    +      -       -      -
    578D  HIS*     3.2    19.0    +      +       -      -
    631D  GLY*     3.0    43.4    +      -       -      -
    632D  ARG      3.9     2.2    -      -       -      -
    635D  GLU*     4.0    16.5    -      -       -      +
    645D  GLY      4.6     1.3    +      -       -      -
    646D  ALA*     4.0    19.1    -      -       +      -
    649D  ASP*     2.8    12.7    +      -       -      -
    803D   ZN      2.3    32.8    -      -       -      -
      5J  ALA      3.6     1.8    +      -       -      -
      6J  ALA*     3.5    23.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 575 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    571D  VAL*     2.9    19.2    +      -       +      +
    572D  ALA      4.2     2.2    -      -       -      +
    574D  HIS*     1.3    83.2    -      -       -      +
    576D  ALA*     1.3    61.5    +      -       -      +
    578D  HIS*     3.2    10.7    +      -       -      +
    579D  ALA*     3.0    25.6    +      -       -      +
    594D  VAL*     3.8    19.9    -      -       +      +
    595D  SER      3.7    12.1    -      -       -      +
    596D  ILE*     4.2     9.4    -      -       +      -
    604D  GLY*     3.4    22.0    -      -       -      +
    605D  TYR      3.6    27.5    -      -       -      +
    606D  ALA*     3.8    11.1    +      -       -      +
    730D  LEU*     4.4     0.9    -      -       +      -
    803D   ZN      4.3     0.6    -      -       -      -
      4J  ALA      4.0     1.0    -      -       -      +
      5J  ALA*     3.5     9.9    -      -       -      +
      6J  ALA*     3.4    21.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 576 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    572D  ALA      3.0    19.2    +      -       -      +
    573D  TYR      4.2     1.6    -      -       -      +
    574D  HIS      3.3     0.2    -      -       -      -
    575D  GLN*     1.3    75.6    -      -       -      +
    577D  GLY*     1.3    58.5    +      -       -      +
    579D  ALA*     4.1     8.1    -      -       -      -
    580D  VAL*     2.9    33.1    +      -       -      +
    723D  VAL*     3.7    32.9    -      -       +      +
    726D  VAL*     4.0    15.3    -      -       +      -
    727D  ALA*     3.8     9.4    -      -       +      -
    730D  LEU*     4.2     1.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 577 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    573D  TYR      3.4     5.5    +      -       -      -
    574D  HIS      3.2     7.1    +      -       -      -
    575D  GLN      3.2     1.0    -      -       -      -
    576D  ALA*     1.3    79.3    -      -       -      +
    578D  HIS*     1.3    60.2    +      -       -      +
    581D  ALA*     3.3    28.1    +      -       -      +
    630D  GLY*     3.4    27.9    -      -       -      +
    634D  SER*     3.8    12.3    -      -       -      -
    716D  LEU*     4.1     6.5    -      -       -      +
    723D  VAL*     4.8     1.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 578 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    574D  HIS*     3.2    30.1    +      +       -      -
    575D  GLN*     3.2    20.5    +      -       -      +
    577D  GLY*     1.3    75.5    -      -       -      +
    579D  ALA*     1.3    62.9    +      -       -      +
    582D  GLY*     3.3    14.9    +      -       -      -
    594D  VAL*     5.7     0.4    -      -       +      -
    606D  ALA*     4.8     5.8    -      -       +      -
    608D  TYR*     2.8    27.0    +      -       +      +
    627D  MET*     3.3    19.6    +      -       -      +
    628D  THR*     3.3    29.5    -      -       +      -
    631D  GLY*     3.8     5.3    +      -       -      -
    649D  ASP*     3.0    10.5    +      -       -      -
    803D   ZN      2.2    35.5    -      -       -      -
      4J  ALA*     3.8    18.4    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 579 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    575D  GLN      3.0    16.0    +      -       -      +
    576D  ALA*     3.8     8.7    -      -       -      +
    577D  GLY      3.3     0.2    -      -       -      -
    578D  HIS*     1.3    75.8    -      -       -      +
    580D  VAL*     1.3    60.0    +      -       -      +
    582D  GLY*     3.4     2.1    +      -       -      -
    583D  TRP*     2.9    28.7    +      -       -      +
    591D  LEU*     3.8    14.9    -      -       -      +
    594D  VAL*     3.8    16.8    -      -       +      +
    726D  VAL*     4.3     9.4    -      -       +      -
    741D  MET*     3.8    23.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 580 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    576D  ALA      2.9    18.7    +      -       -      +
    579D  ALA*     1.3    72.8    -      -       -      +
    581D  ALA*     1.3    64.8    +      -       -      +
    583D  TRP*     3.1    13.8    +      -       -      -
    584D  TYR*     3.1    40.2    +      -       +      +
    716D  LEU*     4.1     7.6    -      -       +      -
    719D  LYS*     4.3     8.5    -      -       +      -
    722D  ASP*     3.8     5.8    -      -       +      +
    723D  VAL*     3.8    34.5    -      -       +      -
    726D  VAL*     3.8    29.2    -      -       +      -
    745D  LEU*     4.7     5.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 581 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    577D  GLY      3.3    19.7    +      -       -      +
    580D  VAL*     1.3    78.2    -      -       -      +
    582D  GLY*     1.3    61.6    +      -       -      +
    584D  TYR      4.2     0.2    -      -       -      -
    585D  LEU*     3.3    33.6    +      -       +      +
    626D  CYS      4.1    18.6    -      -       -      +
    627D  MET*     4.5     5.8    -      -       -      -
    630D  GLY*     4.6     5.6    -      -       -      -
    712D  THR*     4.7     0.9    -      -       +      -
    715D  LEU*     3.9    24.7    -      -       +      -
    716D  LEU*     4.2     9.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 582 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    578D  HIS      3.3    18.9    +      -       -      -
    579D  ALA      3.6     1.6    -      -       -      -
    581D  ALA*     1.3    78.5    -      -       -      +
    583D  TRP*     1.3    59.7    +      -       -      +
    585D  LEU      4.2     0.4    -      -       -      +
    588D  ALA*     3.9    12.3    -      -       -      +
    589D  ASP      4.0     3.6    -      -       -      +
    591D  LEU*     5.6     5.3    -      -       -      +
    608D  TYR*     4.9     6.5    -      -       -      -
    627D  MET*     3.8    18.0    -      -       -      +
    748D  ARG*     3.5    23.9    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 583 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    579D  ALA      2.9    16.5    +      -       -      +
    580D  VAL*     3.1    10.7    +      -       -      +
    582D  GLY*     1.3    78.8    -      -       -      +
    584D  TYR*     1.3    89.7    +      +       +      +
    585D  LEU      3.5     0.4    -      -       -      +
    591D  LEU*     5.3    12.6    -      -       +      -
    738D  LYS*     4.6    20.4    -      -       +      -
    741D  MET*     4.0    37.7    -      -       +      -
    742D  VAL*     3.9    23.6    -      -       +      -
    745D  LEU*     3.7    26.1    +      -       +      +
    746D  GLY      3.3    22.4    -      -       -      -
    748D  ARG*     3.2    66.7    +      -       +      +
    749D  PRO*     4.2     5.7    -      -       +      +
    750D  PHE*     4.5     0.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 584 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    580D  VAL*     3.1    45.3    +      -       +      +
    581D  ALA      4.8     0.7    -      -       -      +
    583D  TRP*     1.3    99.1    -      +       +      +
    585D  LEU*     1.3    62.9    +      -       -      +
    715D  LEU*     4.6    19.7    -      -       +      +
    719D  LYS*     3.6    35.2    +      -       +      -
    722D  ASP*     3.1    25.0    +      -       +      -
    745D  LEU*     3.8    26.8    +      -       +      +
    749D  PRO*     4.5    18.4    -      -       +      -
    750D  PHE*     3.3    20.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 585 (chain D). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    581D  ALA      3.3    22.2    +      -       -      +
    582D  GLY      4.2     0.3    -      -       -      +
    583D  TRP      3.5     0.2    -      -       -      -
    584D  TYR*     1.3    81.6    -      -       -      +
    586D  GLU*     1.3    60.1    +      -       -      +
    588D  ALA*     4.0    11.7    +      -       +      -
    623D  ASP*     3.6    33.4    -      -       +      +
    626D  CYS*     3.7    22.0    -      -       +      +
    627D  MET*     4.0     7.6    -      -       +      +
    711D  ARG*     3.5    31.2    -      -       -      +
    715D  LEU*     4.1    21.5    -      -       +      -
    748D  ARG*     2.9    26.0    +      -       -      -
    750D  PHE*     3.7     3.3    -      -       -      -
----------------------------------------------------------
 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