Contacts of the helix formed by residues 206 - 229 (chain B) in PDB entry 3AP3


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 SER 206 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193B  ILE*     4.2     5.7    -      -       -      +
    203B  ASP*     3.2    19.0    +      -       -      +
    204B  LEU      3.9     0.8    -      -       -      -
    205B  SER*     1.3    79.5    -      -       -      +
    207B  TYR*     1.3    58.4    +      -       -      +
    208B  ARG*     3.3    14.6    +      -       -      +
    209B  ASP*     3.0    22.1    +      -       -      +
    210B  CYS*     3.1    32.6    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 207 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  VAL*     3.6    19.7    -      -       +      -
    190B  HIS*     3.4    33.4    +      -       +      -
    193B  ILE*     3.4    45.2    -      -       +      +
    194B  THR*     4.2     3.1    -      -       -      +
    206B  SER*     1.3    69.0    +      -       -      +
    208B  ARG*     1.3    65.9    +      -       -      +
    210B  CYS*     3.2     0.9    +      -       -      +
    211B  LEU*     3.0    37.8    +      -       +      +
    304B  HIS*     4.4    15.3    +      -       -      +
    305B  ILE*     4.2    25.4    -      -       +      -
    306B  PRO*     4.0    30.1    -      -       +      -
    309B  VAL*     4.4     8.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 208 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    206B  SER*     3.4     8.7    -      -       -      +
    207B  TYR*     1.3    78.6    -      -       -      +
    209B  ASP*     1.3    56.4    +      -       -      +
    212B  THR*     2.7    38.2    +      -       -      +
    308B  ASP*     3.3    29.7    +      -       -      -
    309B  VAL*     3.8    19.3    -      -       +      +
    311B  ARG*     4.4     1.6    -      -       -      +
    312B  ASP*     2.6    36.3    +      -       -      +
    316B  ILE*     3.6    31.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 209 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    202B  PHE*     4.2     1.0    -      -       -      -
    203B  ASP*     3.1    55.7    +      -       -      +
    206B  SER*     3.0    13.3    +      -       -      +
    208B  ARG*     1.3    74.7    -      -       -      +
    210B  CYS*     1.3    67.4    +      -       -      +
    212B  THR*     3.6     5.5    +      -       -      -
    213B  LYS*     3.1    36.9    +      -       -      +
    213C  LYS*     5.4     0.3    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 210 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  VAL*     3.4    27.8    -      -       +      +
    192B  MET*     4.5    14.8    -      -       -      -
    193B  ILE*     3.5    22.2    -      -       -      -
    202B  PHE*     4.2    10.4    -      -       -      -
    203B  ASP      3.2    29.8    -      -       -      -
    206B  SER      3.1    19.2    +      -       -      +
    207B  TYR      3.2     0.9    +      -       -      +
    209B  ASP*     1.3    77.6    +      -       -      +
    211B  LEU*     1.3    53.1    +      -       -      +
    213B  LYS*     3.5     4.8    -      -       -      +
    214B  TRP*     2.8    32.7    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 211 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185B  GLY*     3.8    32.8    -      -       -      +
    186B  ARG*     4.1    14.1    -      -       +      +
    189B  VAL*     3.7    18.8    -      -       +      -
    207B  TYR*     3.0    27.3    +      -       +      +
    210B  CYS*     1.3    71.5    -      -       -      +
    212B  THR*     1.3    57.1    +      -       -      +
    213B  LYS      2.8     1.9    +      -       -      -
    214B  TRP*     2.9    10.7    +      -       +      +
    215B  ASN*     2.6    36.8    +      -       -      +
    305B  ILE*     5.3     2.5    -      -       +      -
    309B  VAL*     3.7    25.6    -      -       +      -
    313B  MET*     4.6    16.6    -      -       +      -
    316B  ILE*     3.6    14.8    -      -       +      -
    317B  ALA*     5.1     6.5    -      -       +      -
    320B  LEU*     5.3     1.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 212 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208B  ARG*     2.7    26.5    +      -       -      +
    209B  ASP*     3.9     6.2    -      -       -      -
    211B  LEU*     1.3    77.0    -      -       -      +
    213B  LYS*     1.3    57.7    -      -       +      +
    215B  ASN*     3.0     6.2    -      -       +      +
    216B  LYS*     2.9    28.3    +      -       +      +
    316B  ILE*     3.3    28.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 213 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    201B  GLY*     3.2    39.5    +      -       -      +
    202B  PHE*     4.1    21.3    -      -       +      -
    209B  ASP*     3.1    31.8    +      -       -      +
    210B  CYS*     3.5     5.4    -      -       -      +
    211B  LEU      2.8     1.0    +      -       -      -
    212B  THR*     1.3    75.5    -      -       +      +
    214B  TRP*     1.3    66.4    +      -       -      +
    215B  ASN      3.0     1.3    -      -       -      -
    216B  LYS*     3.2    10.3    +      -       -      +
    217B  ALA*     2.9    26.5    +      -       -      +
    209C  ASP*     5.1     3.2    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 214 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  VAL*     3.8    27.4    -      -       +      +
     79B  SER*     5.1     1.2    +      -       -      -
    182B  VAL*     5.9     0.2    -      -       +      -
    183B  ARG      3.7    13.2    +      -       -      -
    184B  ASP*     4.9     0.4    -      -       -      -
    185B  GLY*     3.2    36.1    -      -       -      -
    188B  SER*     4.4    11.7    +      -       -      -
    189B  VAL*     4.0    12.1    -      -       +      -
    192B  MET*     5.3     0.7    -      -       +      -
    202B  PHE*     3.8    12.6    -      -       +      -
    210B  CYS      2.8    18.5    +      -       -      +
    211B  LEU*     3.2    14.4    -      -       +      +
    213B  LYS*     1.3    71.1    -      -       -      +
    215B  ASN*     1.3    78.5    +      -       +      +
    217B  ALA*     3.3     4.0    +      -       -      +
    218B  ILE*     2.8    58.0    +      -       +      +
    317B  ALA*     3.7    26.0    -      -       +      -
    319B  MET*     4.1     7.6    -      -       +      -
    320B  LEU*     3.4    25.8    -      -       +      -
    323B  LEU*     4.0    16.8    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN 215 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    211B  LEU      2.6    15.3    +      -       -      +
    212B  THR*     3.0    15.3    -      -       -      +
    214B  TRP*     1.3    82.4    -      -       +      +
    216B  LYS*     1.3    72.9    +      -       -      +
    218B  ILE*     3.8     2.0    -      -       -      +
    219B  GLU*     2.9    34.3    +      -       -      +
    316B  ILE      3.6    15.8    -      -       -      +
    317B  ALA*     3.3    22.6    -      -       -      +
    318B  PRO*     3.5    12.4    -      -       -      +
    319B  MET*     3.3    27.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 216 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212B  THR*     2.9    18.1    +      -       +      +
    213B  LYS*     3.2    12.1    +      -       -      +
    215B  ASN*     1.3    79.1    +      -       -      +
    217B  ALA*     1.3    62.0    +      -       -      +
    219B  GLU*     3.3    35.7    +      -       -      +
    220B  VAL*     3.2    44.5    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 217 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  VAL*     4.0    15.0    -      -       +      -
    161B  PHE*     4.7    13.2    -      -       +      -
    164B  LYS*     5.2    10.0    -      -       -      +
    202B  PHE*     4.4    15.3    -      -       +      -
    213B  LYS*     2.9    17.5    +      -       +      +
    214B  TRP      3.5     3.6    -      -       -      +
    216B  LYS*     1.3    77.3    -      -       -      +
    218B  ILE*     1.3    61.2    +      -       -      +
    220B  VAL*     3.4     8.1    +      -       -      +
    221B  MET*     3.3    28.2    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE 218 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     76B  VAL*     3.9    21.0    -      -       +      +
    180B  LEU*     4.7    15.9    -      -       +      -
    181B  MET      5.1     4.5    -      -       -      +
    182B  VAL*     4.2    26.2    -      -       +      -
    183B  ARG      6.3     0.4    -      -       -      +
    214B  TRP*     2.8    51.7    +      -       +      +
    215B  ASN      3.8     7.6    -      -       -      +
    217B  ALA*     1.3    71.9    -      -       -      +
    219B  GLU*     1.3    65.6    +      -       -      +
    221B  MET*     4.1     5.8    -      -       -      +
    222B  TYR*     3.3    23.7    +      -       +      +
    319B  MET*     4.1    14.3    -      -       +      +
    323B  LEU*     4.2    18.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 219 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    215B  ASN*     2.9    25.5    +      -       -      +
    216B  LYS*     3.3    40.6    +      -       -      +
    217B  ALA      3.3     0.2    -      -       -      -
    218B  ILE*     1.3    78.2    -      -       -      +
    220B  VAL*     1.3    60.9    +      -       -      +
    222B  TYR*     4.2     1.9    -      -       -      +
    223B  ALA*     3.5    20.8    +      -       -      +
    319B  MET*     3.9    30.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 220 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164B  LYS*     4.4    31.2    -      -       -      +
    216B  LYS*     3.2    34.6    +      -       +      +
    217B  ALA*     3.8     7.6    -      -       -      +
    218B  ILE      3.2     0.6    -      -       -      -
    219B  GLU*     1.3    77.4    -      -       -      +
    221B  MET*     1.3    60.5    +      -       -      +
    222B  TYR      3.1     2.4    +      -       -      -
    223B  ALA*     3.2     6.4    +      -       -      +
    224B  GLN*     2.9    44.0    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 221 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     75B  GLY*     3.7    37.7    -      -       -      +
     76B  VAL*     3.9    13.7    -      -       +      +
    160B  PRO      4.0    11.4    -      -       -      +
    161B  PHE*     3.9    20.0    -      -       +      -
    163B  LEU*     3.9    25.2    -      -       +      +
    164B  LYS*     3.9    27.8    -      -       +      +
    166B  SER*     4.9     0.5    +      -       -      -
    180B  LEU*     3.5    22.3    -      -       +      +
    217B  ALA      3.3    18.3    +      -       -      +
    218B  ILE*     4.2     7.0    -      -       -      +
    219B  GLU      3.7     0.2    -      -       -      -
    220B  VAL*     1.3    75.5    -      -       -      +
    222B  TYR*     1.3    57.4    +      -       -      +
    224B  GLN*     3.4     4.5    -      -       -      +
    225B  CYS*     2.8    27.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR 222 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180B  LEU*     3.7    22.2    -      -       +      +
    182B  VAL*     5.1     0.4    -      -       +      -
    218B  ILE*     3.3    18.7    +      -       +      +
    219B  GLU      4.2     3.4    -      -       -      +
    220B  VAL      3.1     0.6    -      -       -      -
    221B  MET*     1.3    77.1    -      -       -      +
    223B  ALA*     1.3    55.7    +      -       -      +
    225B  CYS*     3.0     2.9    +      -       -      +
    226B  MET*     2.6    66.0    +      -       +      +
    235B  PRO*     4.0    25.9    -      -       +      +
    237B  TYR*     4.8     6.4    +      -       -      -
    319B  MET*     4.6    15.0    -      -       +      -
    322B  GLN*     5.2     9.1    +      -       +      -
    323B  LEU*     4.0    29.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 223 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219B  GLU      3.5    12.9    +      -       -      +
    220B  VAL*     3.2     9.1    +      -       -      +
    222B  TYR*     1.3    78.1    -      -       -      +
    224B  GLN*     1.3    53.4    +      -       +      +
    226B  MET*     3.2     7.8    +      -       -      +
    227B  GLU*     2.8    39.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 224 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  LEU      4.2     1.1    -      -       -      +
    164B  LYS      3.2    23.4    +      -       -      +
    165B  SER*     3.3     2.4    -      -       -      -
    166B  SER*     3.2    20.9    +      -       -      +
    167B  VAL*     3.1    47.7    +      -       -      +
    220B  VAL*     2.9    25.0    +      -       +      +
    221B  MET*     3.4    11.7    -      -       -      +
    223B  ALA*     1.3    72.8    -      -       +      +
    225B  CYS*     1.3    60.4    +      -       -      +
    226B  MET      2.9     0.7    +      -       -      -
    227B  GLU*     3.1     6.1    +      -       -      +
    228B  VAL*     2.8    35.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 225 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163B  LEU*     5.9     0.4    -      -       +      -
    166B  SER*     4.2     2.8    +      -       -      +
    180B  LEU*     3.9    14.4    -      -       +      -
    221B  MET      2.8    22.8    +      -       -      +
    222B  TYR*     3.0     6.0    +      -       +      +
    224B  GLN*     1.3    73.0    -      -       -      +
    226B  MET*     1.3    74.9    +      -       +      +
    228B  VAL*     4.0     3.1    -      -       -      -
    229B  GLY*     3.4    16.5    +      -       -      +
    233B  CYS*     2.0    64.5    -      -       -      +
    235B  PRO*     4.1    14.1    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with MET 226 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    222B  TYR*     2.6    51.3    +      -       +      +
    223B  ALA*     3.5     9.0    -      -       -      +
    224B  GLN      3.0     0.2    -      -       -      -
    225B  CYS*     1.3    93.3    -      -       +      +
    227B  GLU*     1.3    65.8    +      -       -      +
    228B  VAL      3.2     1.3    -      -       -      -
    229B  GLY*     3.4    11.4    +      -       -      -
    230B  LYS*     5.7    13.2    -      -       +      +
    233B  CYS      5.2     2.5    -      -       -      +
    235B  PRO*     4.4    17.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 227 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  VAL*     4.3    26.1    -      -       +      +
    171B  ARG*     5.4     3.3    +      -       -      -
    223B  ALA*     2.8    20.9    +      -       -      +
    224B  GLN*     3.7     5.3    +      -       -      +
    226B  MET*     1.3    71.8    -      -       -      +
    228B  VAL*     1.3    67.9    +      -       -      +
    229B  GLY*     3.3     1.0    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL 228 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166B  SER*     3.8    27.8    -      -       -      +
    167B  VAL*     4.1    19.5    -      -       +      +
    170B  SER*     5.1     4.0    -      -       -      -
    178B  PHE*     4.8     6.1    -      -       +      -
    224B  GLN      2.8    23.8    +      -       -      +
    225B  CYS*     3.4     7.9    -      -       -      +
    227B  GLU*     1.3    78.9    -      -       -      +
    229B  GLY*     1.3    58.1    +      -       -      +
    232B  LYS*     3.3    43.3    -      -       +      +
    233B  CYS*     3.4    17.5    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 229 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    225B  CYS      3.4     9.2    +      -       -      -
    226B  MET*     3.4    10.2    +      -       -      -
    227B  GLU      3.3     3.5    -      -       -      -
    228B  VAL*     1.3    79.1    -      -       -      +
    230B  LYS*     1.3    64.8    -      -       -      -
    231B  GLU*     2.8    10.2    +      -       -      -
    232B  LYS      2.8    13.5    +      -       -      -
    233B  CYS      2.8    12.5    +      -       -      +
----------------------------------------------------------
 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