Contacts of the helix formed by residues 48 - 71 (chain K) in PDB entry 3SDI


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 GLY 48 (chain K).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47K  GLY*     1.3    68.3    -      -       -      -
     49K  ALA*     1.3    67.5    +      -       -      -
     50K  ALA      3.4     2.5    -      -       -      -
     51K  ASP*     3.6    10.8    +      -       -      +
     52K  CYS*     3.0    27.9    +      -       -      +
     96K  SER      2.8    17.4    +      -       -      -
    302K  3SD      3.6    26.5    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 49 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     47K  GLY      3.3     2.2    +      -       -      -
     48K  GLY*     1.3    70.0    -      -       -      +
     50K  ALA*     1.3    55.2    +      -       -      +
     52K  CYS*     3.1     3.3    +      -       -      +
     53K  GLN*     2.7    36.5    +      -       -      +
    302K  3SD      2.9    68.5    +      -       +      +
    118L  SER*     3.5    24.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA 50 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48K  GLY      3.4     0.2    -      -       -      -
     49K  ALA*     1.3    77.3    -      -       -      +
     51K  ASP*     1.3    57.1    +      -       -      +
     52K  CYS      3.1     0.2    +      -       -      -
     53K  GLN*     4.5     1.6    -      -       -      -
     54K  PHE*     2.8    37.6    +      -       -      +
    302K  3SD      4.8     0.2    +      -       -      -
     84L  GLN*     5.5     0.4    -      -       -      +
     88L  TYR*     4.0     9.9    -      -       +      -
    114L  ASP*     4.4     1.4    +      -       -      +
    116L  VAL*     3.4    45.1    -      -       +      +
    117L  GLY      4.3     1.1    -      -       -      -
    118L  SER*     3.3    24.2    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP 51 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     48K  GLY*     3.6    12.6    +      -       -      +
     50K  ALA*     1.3    76.5    -      -       -      +
     52K  CYS*     1.3    62.0    +      -       -      +
     55K  TRP*     3.2    31.0    +      -       -      +
     95K  LEU*     3.3    12.1    -      -       -      +
     96K  SER*     2.8    37.7    +      -       -      +
     97K  MET*     3.8    14.1    -      -       -      +
     88L  TYR*     2.9    18.3    +      -       -      +
     91L  ARG*     2.7    39.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 52 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     45K  MET*     3.6    25.4    -      -       +      -
     46K  ALA      3.2    41.7    -      -       -      -
     48K  GLY      3.0    21.8    +      -       -      +
     49K  ALA*     3.5     4.5    -      -       -      +
     51K  ASP*     1.3    74.3    -      -       -      +
     53K  GLN*     1.3    67.4    +      -       -      +
     54K  PHE      3.2     0.2    +      -       -      -
     55K  TRP*     4.4     0.2    -      -       -      +
     56K  GLU*     2.9    33.7    +      -       -      +
     97K  MET*     3.5    22.4    -      -       -      -
     98K  GLY      4.5     1.6    -      -       -      -
     99K  THR*     4.7     0.4    -      -       -      -
    302K  3SD      4.6     1.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 53 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     32K  LYS      5.6     1.0    +      -       -      -
     45K  MET*     3.8    19.6    -      -       +      +
     49K  ALA      2.7    20.2    +      -       -      +
     50K  ALA*     3.8     2.5    -      -       -      +
     52K  CYS*     1.3    70.8    -      -       -      +
     54K  PHE*     1.3    56.0    +      -       -      +
     56K  GLU*     3.9     0.5    -      -       -      +
     57K  THR*     2.8    43.2    +      -       -      +
    302K  3SD      4.0    18.3    -      -       +      +
     84L  GLN*     2.8    30.2    +      -       -      +
    118L  SER*     3.3     5.0    +      -       -      +
    119L  TYR*     2.8    47.2    +      -       +      +
    120L  GLU*     3.4    11.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE 54 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  LEU*     5.4     3.5    -      -       +      +
     50K  ALA      2.8    24.8    +      -       -      +
     51K  ASP      4.2     1.3    -      -       -      +
     53K  GLN*     1.3    75.1    -      -       -      +
     55K  TRP*     1.3    89.6    +      +       -      +
     57K  THR*     3.8     3.2    -      -       -      -
     58K  TRP*     3.1    28.3    +      +       +      +
     84L  GLN*     4.2    23.6    -      -       +      +
     85L  HIS*     3.5    41.1    -      +       -      -
     88L  TYR*     3.6    56.8    -      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 55 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51K  ASP*     3.2    26.9    +      -       -      +
     54K  PHE*     1.3   102.3    -      +       -      +
     56K  GLU*     1.3    63.3    +      -       -      +
     58K  TRP*     3.6    41.7    -      +       +      +
     59K  LEU*     2.9    25.1    +      -       -      +
     83K  LEU*     4.1     9.9    -      -       +      +
     86K  LEU*     3.5    35.2    -      -       +      -
     90K  TYR*     3.8    33.4    -      +       -      -
     95K  LEU*     3.9    15.7    -      -       +      +
     97K  MET*     3.9    19.5    -      -       +      -
     88L  TYR*     2.9    31.8    +      +       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 56 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35K  ILE*     3.2    38.2    -      -       +      +
     37K  ILE*     4.6     4.2    -      -       +      +
     43K  GLY*     3.2    19.2    -      -       -      -
     44K  THR      2.7    22.8    -      -       -      +
     45K  MET*     3.4    18.8    -      -       +      +
     52K  CYS*     2.9    21.4    +      -       -      +
     53K  GLN      4.2     0.9    -      -       -      +
     55K  TRP*     1.3    78.9    -      -       -      +
     57K  THR*     1.3    63.3    +      -       -      +
     59K  LEU*     3.3     9.1    +      -       +      +
     60K  GLY*     3.2    16.8    +      -       -      -
     83K  LEU*     4.3    17.0    -      -       +      -
     97K  MET*     5.0     2.0    -      -       +      -
     99K  THR*     2.9    20.2    +      -       -      +
    101K  ILE*     4.2     3.9    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR 57 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  LEU*     3.5    19.5    -      -       +      -
     35K  ILE*     4.3    19.2    -      -       +      +
     45K  MET*     5.9     0.3    -      -       -      +
     53K  GLN*     2.8    29.3    +      -       -      +
     54K  PHE*     3.8     5.6    -      -       -      -
     56K  GLU*     1.3    75.9    -      -       -      +
     58K  TRP*     1.3    62.1    +      -       -      +
     60K  GLY*     3.0    13.8    +      -       -      -
     61K  SER*     3.3    11.6    +      -       -      -
     81L  ARG*     3.6    31.3    +      -       -      +
     84L  GLN*     4.9     5.4    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP 58 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  LEU*     3.9    30.6    -      -       +      +
     54K  PHE*     3.1    24.0    +      +       +      +
     55K  TRP*     3.6    39.0    -      +       +      +
     57K  THR*     1.3    73.6    -      -       -      +
     59K  LEU*     1.3    82.2    +      -       +      +
     61K  SER*     3.0    13.7    +      -       -      -
     62K  GLN*     3.0    40.3    +      -       +      +
     82K  ILE*     3.6    35.2    -      -       +      -
     83K  LEU*     4.7     4.3    -      -       +      -
     86K  LEU*     3.8    37.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 59 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37K  ILE*     3.9    24.5    -      -       +      -
     55K  TRP      2.9    19.2    +      -       -      +
     56K  GLU*     3.5     9.9    -      -       +      +
     57K  THR      3.2     0.4    -      -       -      -
     58K  TRP*     1.3    82.4    -      -       +      +
     60K  GLY*     1.3    56.5    +      -       -      +
     62K  GLN*     3.2     4.3    +      -       -      +
     63K  CYS*     2.8    37.8    +      -       -      -
     79K  ALA*     3.1    34.3    -      -       +      +
     82K  ILE*     3.7    22.9    -      -       +      -
     83K  LEU*     3.9    18.6    -      -       +      +
    101K  ILE*     4.0    22.0    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY 60 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     35K  ILE*     6.4     0.4    -      -       -      -
     37K  ILE*     3.9    29.3    -      -       -      +
     56K  GLU      3.2     6.5    +      -       -      -
     57K  THR      3.0    10.0    +      -       -      -
     59K  LEU*     1.3    77.2    -      -       -      +
     61K  SER*     1.3    57.5    +      -       -      +
     63K  CYS*     3.3     2.6    +      -       -      +
     64K  ARG*     3.0    28.6    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER 61 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97D  VAL*     3.5    25.7    +      -       -      +
    100D  ASN*     5.3     3.1    +      -       -      -
    101D  LEU*     3.5    41.9    +      -       -      +
     57K  THR      3.3     3.3    +      -       -      -
     58K  TRP      3.0    10.2    +      -       -      -
     60K  GLY*     1.3    74.9    -      -       -      +
     62K  GLN*     1.3    69.9    +      -       -      +
     64K  ARG*     3.3     4.2    +      -       -      +
     65K  LEU*     3.0    27.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN 62 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101D  LEU*     6.1     0.2    -      -       -      +
     58K  TRP*     3.0    64.9    +      -       +      +
     59K  LEU      3.2     7.2    +      -       -      +
     61K  SER*     1.3    79.4    -      -       -      +
     63K  CYS*     1.3    61.4    +      -       -      +
     65K  LEU*     3.5    22.6    +      -       -      +
     66K  HIS*     3.2    19.9    +      -       -      +
     69K  ARG*     5.3     6.8    +      -       -      -
     82K  ILE*     4.1    25.3    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS 63 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     37K  ILE*     4.0    23.8    -      -       +      -
     38K  ASN*     5.2     3.6    -      -       +      +
     41K  LEU*     4.2     0.2    -      -       -      -
     59K  LEU*     2.8    28.3    +      -       -      +
     60K  GLY      3.6     5.2    -      -       -      +
     61K  SER      3.2     0.2    -      -       -      -
     62K  GLN*     1.3    75.5    -      -       -      +
     64K  ARG*     1.3    64.8    +      -       -      +
     66K  HIS*     3.1    16.3    +      -       -      +
     67K  GLU*     3.3    14.9    +      -       -      +
     74K  ILE*     3.5    39.8    -      -       +      +
     79K  ALA*     3.7    20.4    -      -       -      -
     82K  ILE*     5.2     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 64 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69D  GLU*     3.1    26.9    +      -       -      -
     71D  ASP*     3.3    24.6    +      -       -      +
     72D  ARG*     3.5    13.2    -      -       -      +
     97D  VAL*     4.0    18.8    -      -       +      -
     60K  GLY      3.0    17.6    +      -       -      +
     61K  SER*     3.3     8.0    +      -       -      +
     63K  CYS*     1.3    75.7    -      -       -      +
     65K  LEU*     1.3    61.4    +      -       -      +
     67K  GLU*     2.8    57.9    +      -       -      +
     68K  LEU*     3.2    33.8    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 65 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93D  ARG*     4.1    19.1    -      -       +      +
     94D  THR*     4.5    12.8    -      -       +      +
     97D  VAL*     3.3    39.9    -      -       +      -
     98D  THR*     6.1     0.2    -      -       -      +
     61K  SER      3.0    18.6    +      -       -      +
     62K  GLN*     3.6    29.2    -      -       -      +
     64K  ARG*     1.3    74.3    -      -       -      +
     66K  HIS*     1.3    64.8    +      -       -      +
     68K  LEU*     3.5    11.9    +      -       +      +
     69K  ARG*     3.1    58.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS 66 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    103C  LEU*     3.7    28.5    -      -       +      +
     62K  GLN      3.2    12.5    +      -       -      +
     63K  CYS      3.1    11.2    +      -       -      +
     65K  LEU*     1.3    75.7    -      -       -      +
     67K  GLU*     1.3    53.9    +      -       -      +
     69K  ARG*     3.2     8.3    +      -       -      +
     70K  GLU*     2.9    55.4    +      -       +      +
     72K  GLU*     3.5    21.5    +      -       -      +
     73K  ARG      4.3     2.8    +      -       -      -
     74K  ILE*     3.6    42.5    -      -       +      +
     75K  SER      5.1     0.8    +      -       -      -
     78K  ALA*     5.5     0.2    -      -       +      -
     82K  ILE*     5.8     1.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 67 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     38K  ASN*     4.3    17.7    +      -       -      +
     39K  PRO*     5.8     0.5    -      -       -      +
     63K  CYS      3.3     9.5    +      -       -      +
     64K  ARG*     2.8    41.8    +      -       -      +
     66K  HIS*     1.3    75.8    -      -       -      +
     68K  LEU*     1.3    60.4    +      -       -      +
     71K  LYS*     2.9    29.3    +      -       -      +
     72K  GLU      3.4    22.1    +      -       -      +
     73K  ARG*     3.9    28.1    -      -       +      +
     74K  ILE      4.9     0.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU 68 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69D  GLU*     3.8    34.3    -      -       +      +
     70D  ILE      3.4    29.2    -      -       -      +
     71D  ASP*     4.8     0.9    -      -       -      +
     93D  ARG*     3.1    42.6    +      -       +      +
     97D  VAL*     4.3    11.4    -      -       +      -
     64K  ARG*     3.2    42.4    +      -       -      +
     65K  LEU*     3.9    21.5    -      -       +      +
     66K  HIS      3.4     0.2    -      -       -      -
     67K  GLU*     1.3    79.1    -      -       -      +
     69K  ARG*     1.3    62.3    +      -       -      +
     71K  LYS*     4.3    10.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG 69 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    114C  ARG*     4.0    20.9    +      -       -      +
     90D  GLU*     2.6    49.8    +      -       -      +
     93D  ARG*     3.9    17.3    +      -       -      +
     94D  THR*     4.4     1.2    +      -       -      -
     62K  GLN*     5.3     6.7    +      -       -      -
     65K  LEU*     3.1    51.0    +      -       -      +
     66K  HIS*     3.2     6.9    +      -       -      +
     68K  LEU*     1.3    79.6    -      -       -      +
     70K  GLU*     1.3    78.9    +      -       +      +
     71K  LYS*     4.9     5.1    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU 70 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99C  HIS*     5.7     1.5    +      -       -      -
    108C  THR*     5.1     1.9    +      -       -      -
    110C  GLU*     4.8     0.7    -      -       -      +
    111C  TYR*     3.5    24.6    -      -       -      +
    114C  ARG*     3.2    39.7    +      -       -      +
     66K  HIS*     2.9    46.2    +      -       +      +
     69K  ARG*     1.3    89.6    -      -       +      +
     71K  LYS*     1.3    70.9    +      -       -      +
     72K  GLU*     3.3    11.3    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS 71 (chain K). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     65D  GLU*     3.1    41.4    +      -       -      +
     67D  ILE      5.4     0.6    +      -       -      -
     68D  VAL*     6.2     0.4    -      -       -      +
     93D  ARG*     6.0     2.0    -      -       -      +
    223D  ILE*     5.0    15.6    -      -       -      +
     67K  GLU      2.9    17.4    +      -       -      +
     68K  LEU*     4.4    11.4    -      -       -      +
     69K  ARG      5.0     3.8    -      -       -      +
     70K  GLU*     1.3    80.6    -      -       -      +
     72K  GLU*     1.3    58.7    +      -       -      +
----------------------------------------------------------
 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