Contacts of the helix formed by residues 491 - 514 (chain C) in PDB entry 4DAJ


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 THR 491 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106C  LEU*     4.4    26.4    -      -       +      +
    165C  ARG*     5.6     1.3    -      -       -      -
    489C  ALA      3.7     2.4    +      -       -      -
    490C  GLN*     1.3    79.3    +      -       -      +
    492C  LEU*     1.3    60.7    +      -       -      +
    493C  SER*     3.5     1.5    -      -       -      -
    494C  ALA*     3.8     3.3    -      -       +      +
    495C  ILE*     3.2    38.1    +      -       +      +
    542C  CYS      5.2     0.2    -      -       -      +
    543C  TYR*     4.4    12.7    +      -       +      -
    546C  CYS*     3.1    44.8    -      -       +      +
    547C  ASN*     3.4    16.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 492 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158C  LEU      5.5     0.2    -      -       -      +
    161C  ILE*     4.3    20.4    -      -       +      -
    162C  SER*     3.8    24.7    -      -       -      +
    165C  ARG*     5.1    11.0    -      -       -      +
    250C  TYR*     3.8    30.3    -      -       +      -
    253C  ILE*     4.2    33.0    -      -       +      -
    489C  ALA*     4.2    11.7    -      -       -      +
    490C  GLN      2.8     8.5    +      -       -      +
    491C  THR*     1.3    76.8    -      -       -      +
    493C  SER*     1.3    68.6    +      -       -      +
    495C  ILE*     5.1     3.1    -      -       +      -
    496C  LEU*     2.9    38.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 493 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250C  TYR*     2.5    41.9    +      -       -      -
    254C  TYR*     4.9     2.3    -      -       -      -
    489C  ALA*     3.6    16.8    +      -       -      +
    491C  THR      3.5     0.4    -      -       -      -
    492C  LEU*     1.3    76.2    -      -       -      +
    494C  ALA*     1.3    57.7    +      -       -      +
    496C  LEU*     3.9     1.3    -      -       -      +
    497C  LEU*     2.9    41.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 494 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    491C  THR*     3.7     5.2    +      -       -      +
    492C  LEU      3.1     0.2    -      -       -      -
    493C  SER*     1.3    79.1    -      -       -      +
    495C  ILE*     1.3    64.0    +      -       -      +
    497C  LEU*     4.1     1.4    -      -       -      +
    498C  ALA*     2.9    26.1    +      -       -      +
    542C  CYS*     4.2    21.9    -      -       +      +
    545C  LEU*     5.6     7.4    -      -       +      -
    546C  CYS*     3.6    28.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 495 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106C  LEU*     5.1     3.6    -      -       +      -
    109C  LEU*     4.4     7.9    -      -       +      -
    158C  LEU*     3.8    31.6    -      -       +      -
    161C  ILE*     5.9     0.7    -      -       +      -
    491C  THR*     3.2    30.2    +      -       +      +
    492C  LEU*     4.3     3.8    -      -       +      +
    494C  ALA*     1.3    74.3    -      -       -      +
    496C  LEU*     1.3    64.1    +      -       -      +
    498C  ALA*     3.6     4.3    -      -       -      +
    499C  PHE*     2.9    22.6    +      -       +      +
    535C  ASN*     4.7     0.9    +      -       -      +
    539C  ASN*     3.5    25.1    -      -       -      +
    542C  CYS*     3.2    31.6    -      -       +      -
    543C  TYR*     3.9    22.9    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 496 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158C  LEU*     5.4     3.6    -      -       +      -
    162C  SER*     5.3     2.7    -      -       -      +
    243C  VAL*     5.3     3.1    -      -       +      +
    246C  MET*     3.7    49.4    -      -       +      +
    247C  THR*     4.6     9.2    -      -       -      +
    250C  TYR*     3.5    44.6    -      -       +      -
    492C  LEU*     2.9    27.9    +      -       +      +
    493C  SER      3.9     2.2    -      -       -      +
    495C  ILE*     1.3    77.5    -      -       -      +
    497C  LEU*     1.3    65.1    +      -       +      +
    499C  PHE*     3.0    12.8    +      -       +      +
    500C  ILE*     3.0    29.7    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 497 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    250C  TYR*     5.7     6.3    -      -       +      +
    493C  SER*     2.9    27.8    +      -       -      +
    494C  ALA*     4.1     2.2    -      -       -      +
    496C  LEU*     1.3    75.2    -      -       +      +
    498C  ALA*     1.3    63.2    +      -       -      +
    500C  ILE*     3.4    15.9    -      -       +      +
    501C  ILE*     2.9    49.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 498 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    494C  ALA      2.9    18.6    +      -       -      +
    495C  ILE*     3.6     4.9    -      -       -      +
    497C  LEU*     1.3    75.3    -      -       -      +
    499C  PHE*     1.3    55.8    +      -       -      +
    501C  ILE*     3.9     2.6    -      -       -      -
    502C  THR*     2.5    43.0    +      -       +      +
    535C  ASN*     3.5     8.3    -      -       -      +
    538C  VAL*     4.5    12.6    -      -       +      -
    539C  ASN*     4.9     2.2    -      -       -      +
    542C  CYS*     4.1    20.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 499 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154C  SER*     5.9     1.1    -      -       -      -
    155C  VAL*     3.5    28.7    -      -       +      -
    158C  LEU*     3.6    28.9    -      -       +      -
    239C  PHE*     3.8    11.0    -      +       -      -
    242C  PRO*     6.3     0.9    -      -       +      -
    243C  VAL*     3.5    27.4    -      -       +      -
    246C  MET*     4.1    15.3    -      -       +      -
    495C  ILE*     2.9    14.3    +      -       +      +
    496C  LEU*     3.2    11.9    -      -       +      +
    498C  ALA*     1.3    76.8    -      -       -      +
    500C  ILE*     1.3    79.9    +      -       +      +
    502C  THR*     3.1     1.0    +      -       -      -
    503C  TRP*     2.9    68.2    +      +       -      +
    535C  ASN*     2.9    21.7    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 500 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    243C  VAL*     4.4    21.3    -      -       +      -
    247C  THR*     5.4     6.5    -      -       -      +
    496C  LEU*     3.0    23.0    +      -       +      +
    497C  LEU*     3.4    24.2    -      -       +      +
    499C  PHE*     1.3    88.8    -      -       +      +
    501C  ILE*     1.3    57.7    +      -       +      +
    503C  TRP*     4.9     0.2    -      -       -      -
    504C  THR*     2.5    63.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 501 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    497C  LEU*     2.9    42.4    +      -       +      +
    498C  ALA*     4.1     2.5    -      -       -      +
    500C  ILE*     1.3    80.2    -      -       +      +
    502C  THR*     1.3    67.0    +      -       +      +
    504C  THR*     4.0     2.9    +      -       -      -
    505C  PRO*     3.2    23.9    -      -       -      +
    531C  LEU*     5.7     0.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 502 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    498C  ALA*     2.5    30.6    +      -       +      +
    499C  PHE      3.1     4.9    +      -       -      -
    501C  ILE*     1.3    84.9    -      -       +      +
    503C  TRP*     1.3    62.2    +      -       -      +
    505C  PRO*     4.1     2.8    -      -       -      +
    531C  LEU*     3.1    46.7    -      -       -      +
    532C  CYS*     3.6     0.9    +      -       -      -
    534C  ILE*     3.9    24.2    -      -       +      +
    535C  ASN*     2.9    28.0    -      -       -      +
    538C  VAL*     5.4     4.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 503 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116C  ILE*     6.5     1.1    -      -       +      -
    151C  SER*     4.1    19.5    -      -       -      -
    154C  SER*     5.7     3.6    -      -       -      -
    155C  VAL*     3.4    32.3    -      -       +      -
    239C  PHE*     3.4    32.5    -      +       +      -
    499C  PHE*     2.9    30.9    +      +       -      +
    502C  THR*     1.3    87.4    -      -       -      +
    504C  THR*     1.3    69.5    +      -       -      +
    505C  PRO*     2.7     8.2    -      -       -      +
    506C  TYR*     2.7    22.1    +      -       -      +
    507C  ASN*     4.0     1.5    +      -       -      +
    532C  CYS*     3.1    47.1    +      -       +      +
    535C  ASN*     3.5    15.3    +      -       +      +
    536C  SER*     5.8     2.0    -      -       -      -
   2000C  0HK      3.5    47.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 504 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    239C  PHE*     3.1    35.4    -      -       +      -
    240C  TYR*     6.3     0.4    -      -       +      -
    243C  VAL*     5.2     2.0    -      -       +      -
    500C  ILE*     2.5    52.8    +      -       +      +
    501C  ILE*     4.0     2.9    +      -       -      -
    503C  TRP*     1.3    72.1    -      -       -      +
    505C  PRO*     1.3    73.6    -      -       -      +
    507C  ASN*     2.9     4.8    +      -       -      +
    508C  ILE*     2.8    37.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PRO 505 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    501C  ILE      3.2    19.1    -      -       -      +
    502C  THR      4.1     0.7    -      -       -      +
    503C  TRP      2.7     6.3    -      -       -      +
    504C  THR*     1.3    97.6    -      -       -      +
    506C  TYR*     1.3    61.6    +      -       -      +
    508C  ILE*     3.4    15.9    +      -       +      +
    509C  MET*     2.9    23.7    +      -       -      +
    528C  GLY*     5.6     1.8    -      -       -      -
    531C  LEU*     4.3    25.4    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 506 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    148C  TYR*     4.7     4.3    +      -       -      -
    231C  THR*     6.0     0.9    -      -       -      +
    503C  TRP      2.7    18.6    +      -       -      +
    505C  PRO*     1.3    73.5    -      -       -      +
    507C  ASN*     1.3    60.1    +      -       -      +
    509C  MET*     2.8    35.5    +      -       +      +
    510C  VAL*     2.9    24.6    +      -       +      +
    525C  TRP*     4.0    27.3    -      +       +      -
    528C  GLY*     3.9     8.3    -      -       -      +
    529C  TYR*     3.8    48.2    -      +       -      -
    532C  CYS*     3.8    14.4    -      -       -      -
   2000C  0HK      3.5    55.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 507 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    235C  ALA*     3.5    18.4    -      -       -      +
    239C  PHE*     3.2    42.3    -      -       +      +
    240C  TYR*     2.5    34.9    +      -       +      +
    503C  TRP*     4.3     6.9    +      -       -      +
    504C  THR      2.9     8.4    +      -       -      +
    506C  TYR*     1.3    71.9    -      -       -      +
    508C  ILE*     1.3    60.0    +      -       +      +
    509C  MET      3.0     1.6    -      -       -      -
    510C  VAL*     2.9     8.8    +      -       -      +
    511C  LEU      2.8    21.8    +      -       -      -
   2000C  0HK      3.0    41.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 508 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    240C  TYR*     4.1     6.7    -      -       +      +
    504C  THR*     2.8    30.3    +      -       -      +
    505C  PRO*     3.4    18.2    -      -       +      +
    507C  ASN*     1.3    76.4    -      -       +      +
    509C  MET*     1.3    58.5    +      -       -      +
    511C  LEU*     3.8    10.4    -      -       +      +
    512C  VAL*     2.9    44.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 509 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    505C  PRO      2.9    10.9    +      -       -      +
    506C  TYR*     2.8    38.1    +      -       +      +
    508C  ILE*     1.3    76.8    -      -       -      +
    510C  VAL*     1.3    57.4    +      -       -      +
    512C  VAL*     3.8     6.6    -      -       -      +
    513C  ASN*     2.9    26.8    +      -       -      +
    520C  ILE*     3.4    42.1    -      -       +      +
    524C  TYR*     3.5    35.9    -      -       -      +
    525C  TRP*     3.5    29.7    -      -       +      +
    528C  GLY*     4.4     4.0    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 510 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228C  PRO      5.0     0.9    -      -       -      +
    231C  THR*     4.0    19.1    -      -       +      -
    232C  PHE*     3.7    33.9    -      -       +      +
    235C  ALA*     4.0    10.1    -      -       +      -
    506C  TYR*     2.9    38.5    +      -       +      +
    507C  ASN*     2.9    17.5    +      -       -      +
    509C  MET*     1.3    73.9    -      -       -      +
    511C  LEU*     1.3    58.2    +      -       -      +
    512C  VAL      2.9     3.4    -      -       -      -
    513C  ASN*     2.6    29.1    +      -       +      +
    514C  THR*     2.9    13.5    +      -       -      +
    525C  TRP*     4.2     9.4    -      -       +      -
   2000C  0HK      4.7     2.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 511 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    232C  PHE*     3.3    38.1    -      -       +      -
    240C  TYR*     3.6    25.1    -      -       +      +
    507C  ASN      2.8    10.0    +      -       -      +
    508C  ILE*     3.9    10.3    -      -       +      +
    510C  VAL*     1.3    73.0    -      -       -      +
    512C  VAL*     1.3    59.1    +      -       +      +
    514C  THR*     3.8     1.1    -      -       -      -
    515C  PHE*     3.1    43.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 512 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    508C  ILE*     2.9    37.4    +      -       +      +
    509C  MET*     3.8     6.1    -      -       -      +
    511C  LEU*     1.3    80.1    -      -       +      +
    513C  ASN*     1.3    66.7    +      -       -      +
    515C  PHE*     3.1    15.3    +      -       -      +
    516C  CYS*     3.2    22.5    +      -       -      -
    519C  CYS*     4.5     1.1    -      -       +      -
    520C  ILE*     3.9    24.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 513 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228C  PRO*     4.0    21.7    -      -       -      +
    231C  THR*     5.6     5.4    -      -       -      +
    509C  MET      2.9    20.2    +      -       -      +
    510C  VAL*     2.6    12.5    +      -       -      +
    512C  VAL*     1.3    75.7    -      -       -      +
    514C  THR*     1.3    62.5    +      -       -      +
    516C  CYS*     2.8    27.9    +      -       -      +
    517C  ASP*     4.9     7.5    +      -       -      +
    519C  CYS*     5.1     1.6    -      -       -      -
    520C  ILE*     4.6     6.2    -      -       +      +
    525C  TRP*     3.6    28.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 514 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    228C  PRO*     3.2    22.0    +      -       -      +
    229C  THR*     4.5    17.7    -      -       +      -
    232C  PHE*     3.1    31.6    -      -       +      +
    510C  VAL      2.9    12.0    +      -       -      -
    511C  LEU      3.8     3.1    -      -       -      -
    512C  VAL      3.1     0.2    -      -       -      -
    513C  ASN*     1.3    77.5    -      -       -      +
    515C  PHE*     1.3    79.6    -      -       +      +
    516C  CYS      5.3     0.2    -      -       -      -
    248D  ILE*     4.3    15.5    -      -       +      -
    252D  ARG*     2.8    34.8    +      -       -      +
----------------------------------------------------------
 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