Contacts of the helix formed by residues 1905 - 1934 (chain r) in PDB entry 6FF7


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 SER1905 (chain r).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1904r  LEU*     1.3    76.9    -      -       -      +
   1906r  ALA*     1.3    59.4    +      -       -      +
   1907r  GLU*     3.1    13.7    +      -       -      -
   1908r  LEU*     3.2     7.0    +      -       -      +
   1909r  GLN*     2.8    26.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA1906 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1623r  GLY*     5.3    16.2    -      -       -      +
   1904r  LEU      3.8     1.4    +      -       -      -
   1905r  SER*     1.3    72.4    -      -       -      +
   1907r  GLU*     1.3    57.3    +      -       -      +
   1909r  GLN*     3.6    10.1    -      -       -      -
   1910r  SER*     2.9    30.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU1907 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1622r  GLU*     6.4     1.6    -      -       -      -
   1905r  SER*     3.1     9.6    -      -       -      -
   1906r  ALA*     1.3    82.1    -      -       -      +
   1908r  LEU*     1.3    61.6    +      -       +      +
   1910r  SER*     3.7    13.5    +      -       -      -
   1911r  ASP*     3.7     4.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1908 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1894r  LEU*     5.5     4.3    -      -       +      +
   1904r  LEU*     5.0    10.8    -      -       +      -
   1905r  SER*     3.2     9.4    +      -       -      +
   1907r  GLU*     1.3    77.2    -      -       +      +
   1909r  GLN*     1.3    60.1    +      -       -      +
   1910r  SER      3.4     0.2    -      -       -      -
   1911r  ASP*     3.3    11.7    -      -       +      +
   1912r  THR*     2.9    26.5    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN1909 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1904r  LEU*     4.7    10.0    -      -       +      +
   1905r  SER      2.8    19.9    +      -       -      +
   1906r  ALA*     3.6    11.9    -      -       +      +
   1907r  GLU      3.3     0.2    -      -       -      -
   1908r  LEU*     1.3    74.6    -      -       -      +
   1910r  SER*     1.3    65.7    +      -       -      +
   1912r  THR*     3.2     9.6    +      -       -      -
   1913r  GLU*     3.0    22.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with SER1910 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1622r  GLU*     6.4     2.5    -      -       -      -
   1906r  ALA      2.9    17.1    +      -       -      -
   1907r  GLU*     3.7     6.7    -      -       -      -
   1909r  GLN*     1.3    74.2    -      -       -      +
   1911r  ASP*     1.3    64.1    +      -       -      +
   1913r  GLU*     3.1    11.4    +      -       -      +
   1914r  GLU*     3.0    20.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP1911 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1858r  ILE*     6.2     3.6    -      -       +      -
   1894r  LEU*     5.9     2.7    -      -       +      -
   1907r  GLU      3.7     3.0    +      -       -      +
   1908r  LEU*     3.3    20.3    +      -       +      +
   1909r  GLN      3.2     0.2    -      -       -      -
   1910r  SER*     1.3    78.5    -      -       -      +
   1912r  THR*     1.3    62.9    +      -       -      +
   1914r  GLU*     3.0    10.3    +      -       -      +
   1915r  ILE*     2.9    21.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR1912 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1894r  LEU*     4.8    25.2    -      -       -      +
   1898r  HIS*     5.4     8.1    -      -       -      -
   1908r  LEU      2.9    14.2    +      -       -      -
   1909r  GLN*     3.2    12.8    +      -       -      -
   1911r  ASP*     1.3    74.0    -      -       -      +
   1913r  GLU*     1.3    63.4    +      -       -      +
   1915r  ILE*     3.1     9.3    +      -       -      +
   1916r  LEU*     2.9    25.0    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU1913 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1909r  GLN      3.0    12.6    +      -       -      +
   1910r  SER*     3.3    11.9    -      -       -      +
   1912r  THR*     1.3    75.9    -      -       -      +
   1914r  GLU*     1.3    61.9    +      -       -      +
   1916r  LEU*     3.4     7.9    +      -       -      +
   1917r  SER*     3.0    22.3    +      -       -      -
   2057r  PRO*     4.6    19.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU1914 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1910r  SER      3.0    13.0    +      -       -      +
   1911r  ASP*     3.0     9.8    +      -       -      +
   1913r  GLU*     1.3    77.0    -      -       -      +
   1915r  ILE*     1.3    64.1    +      -       -      +
   1917r  SER*     3.2    21.0    +      -       -      -
   1918r  LYS*     3.7     4.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE1915 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1891r  THR*     5.3    14.8    -      -       -      +
   1894r  LEU*     6.0     3.8    -      -       +      -
   1895r  LEU*     6.4     1.6    -      -       +      -
   1911r  ASP      2.9    11.1    +      -       -      +
   1912r  THR*     3.4    12.3    -      -       -      +
   1914r  GLU*     1.3    75.0    -      -       -      +
   1916r  LEU*     1.3    63.5    +      -       -      +
   1917r  SER      3.2     0.7    +      -       -      -
   1918r  LYS*     3.2     6.2    +      -       -      +
   1919r  ALA*     3.0    21.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1916 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1912r  THR      2.9    13.2    +      -       -      +
   1913r  GLU*     3.6    11.7    -      -       -      +
   1915r  ILE*     1.3    77.2    -      -       -      +
   1917r  SER*     1.3    64.9    +      -       -      +
   1919r  ALA*     3.2    21.7    +      -       -      +
   1920r  ILE*     4.4     3.8    +      -       -      +
   2056r  PHE*     6.2     2.7    -      -       +      -
   2057r  PRO*     5.6     8.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER1917 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1913r  GLU      3.0    13.7    +      -       -      -
   1914r  GLU*     3.3    15.3    -      -       -      -
   1915r  ILE      3.2     0.4    -      -       -      -
   1916r  LEU*     1.3    77.7    -      -       -      +
   1918r  LYS*     1.3    59.4    +      -       -      +
   1920r  ILE*     5.1     3.5    +      -       -      +
   2057r  PRO*     5.6     6.5    -      -       -      +
   2058r  GLN*     5.6     8.3    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS1918 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1854r  GLU*     5.5    11.2    -      -       +      -
   1914r  GLU      3.7     4.2    +      -       -      +
   1915r  ILE      3.2     7.0    +      -       -      +
   1917r  SER*     1.3    77.1    -      -       -      +
   1919r  ALA*     1.3    65.8    +      -       -      +
   1920r  ILE      3.5     2.0    +      -       -      -
   1921r  ARG*     3.6    15.9    +      -       +      +
   1922r  LEU*     3.8     9.9    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA1919 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1915r  ILE      3.0    14.0    +      -       -      +
   1916r  LEU*     3.2    18.8    +      -       -      +
   1918r  LYS*     1.3    77.2    -      -       -      +
   1920r  ILE*     1.3    65.2    +      -       -      +
   1922r  LEU*     3.0    11.3    +      -       -      +
   1923r  ILE*     3.0    21.7    +      -       -      +
   1949r  VAL*     5.5    11.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE1920 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1916r  LEU      4.4     3.9    +      -       -      +
   1917r  SER      5.1     3.1    +      -       -      +
   1918r  LYS      3.5     0.6    -      -       -      -
   1919r  ALA*     1.3    77.0    -      -       -      +
   1921r  ARG*     1.3    63.5    +      -       -      +
   1923r  ILE*     3.2    10.0    +      -       -      +
   1924r  GLN*     2.9    24.8    +      -       -      +
   1946r  ALA*     6.0     4.9    -      -       +      +
   1949r  VAL*     6.4     1.3    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG1921 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1822r  TYR*     4.4    27.9    -      -       +      +
   1918r  LYS*     3.6    13.5    +      -       +      +
   1919r  ALA      3.2     0.8    -      -       -      -
   1920r  ILE*     1.3    77.0    -      -       -      +
   1922r  LEU*     1.3    59.3    +      -       -      +
   1924r  GLN*     3.2     7.4    +      -       -      +
   1925r  ALA*     2.9    28.2    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1922 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1849r  ILE*     5.2    18.4    -      -       +      +
   1852r  ALA*     5.5     8.5    -      -       +      -
   1918r  LYS      3.8     6.5    +      -       -      +
   1919r  ALA*     3.0    11.8    +      -       -      +
   1921r  ARG*     1.3    79.1    -      -       -      +
   1923r  ILE*     1.3    62.7    +      -       -      +
   1925r  ALA*     3.0    10.7    +      -       -      +
   1926r  CYS*     3.0    20.8    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ILE1923 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1849r  ILE*     5.7     4.9    -      -       -      +
   1919r  ALA      3.0    12.2    +      -       -      +
   1920r  ILE*     3.2    13.7    +      -       -      +
   1922r  LEU*     1.3    75.1    -      -       -      +
   1924r  GLN*     1.3    62.8    +      -       -      +
   1926r  CYS*     3.0    12.3    +      -       -      +
   1927r  VAL*     2.9    19.1    +      -       -      +
   1942r  ALA*     4.6    11.7    -      -       +      +
   1945r  LEU*     5.6     4.0    -      -       +      -
   1946r  ALA*     4.8    23.1    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN1924 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1920r  ILE      2.9    13.1    +      -       -      +
   1921r  ARG*     3.4    10.8    -      -       -      +
   1923r  ILE*     1.3    75.1    -      -       -      +
   1925r  ALA*     1.3    63.0    +      -       -      +
   1927r  VAL*     3.0    12.1    +      -       -      +
   1928r  ASP*     2.9    22.9    +      -       -      +
   1946r  ALA*     6.0     0.6    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ALA1925 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1818r  ILE*     5.6    11.7    -      -       +      +
   1822r  TYR*     5.1    11.9    -      -       +      +
   1829r  ILE*     6.0     6.7    -      -       +      -
   1921r  ARG      2.9    12.7    +      -       -      +
   1922r  LEU*     3.2    13.0    -      -       -      +
   1924r  GLN*     1.3    76.8    -      -       -      +
   1926r  CYS*     1.3    58.1    +      -       -      +
   1928r  ASP*     3.1     8.2    +      -       -      +
   1929r  VAL*     2.9    29.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS1926 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1845r  LEU*     6.3     2.9    -      -       +      -
   1922r  LEU      3.0    11.5    +      -       -      +
   1923r  ILE*     3.0    12.8    +      -       -      +
   1925r  ALA*     1.3    73.9    -      -       -      +
   1927r  VAL*     1.3    65.1    +      -       -      +
   1929r  VAL*     3.2     6.6    +      -       -      +
   1930r  LEU*     2.9    27.6    +      -       -      +
   1942r  ALA*     4.7    11.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL1927 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1923r  ILE      2.9     9.5    +      -       -      +
   1924r  GLN*     3.2    16.2    -      -       -      +
   1926r  CYS*     1.3    76.9    -      -       -      +
   1928r  ASP*     1.3    58.7    +      -       -      +
   1930r  LEU*     3.4     3.6    +      -       -      +
   1931r  SER*     2.9    32.7    +      -       -      -
   1939r  ALA*     4.7     9.3    -      -       +      +
   1942r  ALA*     4.4    16.0    -      -       +      +
   1943r  MET*     5.3     7.2    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASP1928 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1818r  ILE*     5.3    11.2    -      -       +      -
   1924r  GLN      2.9    11.8    +      -       -      +
   1925r  ALA*     3.1    11.2    +      -       -      +
   1927r  VAL*     1.3    74.7    -      -       -      +
   1929r  VAL*     1.3    59.3    +      -       -      +
   1931r  SER*     4.0     4.1    -      -       -      -
   1932r  SER*     2.9    33.7    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL1929 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1818r  ILE*     6.2     0.6    -      -       -      +
   1832r  PHE*     5.3    15.0    -      -       +      +
   1833r  SER*     5.9     3.4    -      -       -      +
   1836r  LEU*     5.8     7.4    -      -       +      -
   1925r  ALA      2.9    18.5    +      -       -      +
   1926r  CYS*     3.8     7.6    -      -       -      +
   1928r  ASP*     1.3    72.8    -      -       -      +
   1930r  LEU*     1.3    58.1    +      -       -      +
   1932r  SER*     3.8     4.1    -      -       -      -
   1933r  ASN*     2.9    30.5    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1930 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1836r  LEU*     5.8     9.0    -      -       +      -
   1926r  CYS      2.9    17.3    +      -       -      +
   1927r  VAL      3.8     2.9    -      -       -      +
   1929r  VAL*     1.3    76.6    -      -       -      +
   1931r  SER*     1.3    58.2    +      -       -      +
   1933r  ASN*     3.3     6.2    +      -       -      +
   1934r  GLY      2.8    23.2    +      -       -      -
   1935r  TRP*     3.2    17.2    +      -       +      +
   1938r  PRO*     4.6    10.8    -      -       +      -
   1939r  ALA*     4.2    25.1    -      -       -      +
   1942r  ALA*     6.0     0.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER1931 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1927r  VAL      2.9    17.5    +      -       -      -
   1928r  ASP*     4.1     4.5    -      -       -      -
   1930r  LEU*     1.3    76.9    -      -       -      +
   1932r  SER*     1.3    63.0    +      -       -      +
   1934r  GLY*     3.1    14.3    +      -       -      +
   1939r  ALA*     4.5    12.3    -      -       -      +
   2076r  LEU*     4.4    15.4    -      -       -      +
   2079r  ILE*     4.8    18.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER1932 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1814r  ASN*     5.5    10.1    -      -       -      -
   1928r  ASP      2.9    20.2    +      -       -      -
   1929r  VAL*     3.8     4.5    -      -       -      -
   1931r  SER*     1.3    74.1    -      -       -      +
   1933r  ASN*     1.3    61.8    +      -       -      +
   1934r  GLY*     3.0     6.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN1933 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1929r  VAL      2.9    19.8    +      -       -      +
   1930r  LEU*     3.3     6.9    +      -       -      +
   1932r  SER*     1.3    74.3    -      -       -      +
   1934r  GLY*     1.3    60.1    +      -       -      +
   1935r  TRP*     3.8     3.6    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLY1934 (chain r). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1930r  LEU      2.8     7.1    +      -       -      -
   1931r  SER      3.1    12.1    +      -       -      -
   1932r  SER      3.0     5.3    -      -       -      -
   1933r  ASN*     1.3    79.3    -      -       -      +
   1935r  TRP*     1.3    56.0    +      -       -      -
   2074r  ASN      3.7     5.9    -      -       -      +
   2075r  SER*     3.8     4.0    -      -       -      -
   2076r  LEU*     3.3    28.7    +      -       -      -
----------------------------------------------------------
 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