Contacts of the helix formed by residues 1548 - 1569 (chain B) in PDB entry 5JCZ


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 ASP1548 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1495B  PRO*     5.8     0.3    -      -       -      +
   1545B  ARG*     4.5    14.0    -      -       +      +
   1546B  GLY      3.3     2.8    -      -       -      -
   1547B  ASP*     1.3    77.7    -      -       -      +
   1549B  PHE*     1.3    68.3    +      -       -      +
   1550B  GLU*     4.0    11.4    +      -       -      +
   1551B  THR*     2.9    34.7    +      -       -      +
   1552B  VAL*     3.2    27.0    +      -       -      +
   1614B  VAL*     4.5     0.7    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE1549 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1547B  ASP      4.0     2.8    +      -       -      -
   1548B  ASP*     1.3    74.8    +      -       -      +
   1550B  GLU*     1.3    62.5    +      -       +      +
   1552B  VAL*     3.4     4.4    +      -       -      +
   1553B  SER*     2.8    34.6    +      -       -      -
   1611B  LEU*     3.5    29.4    -      -       +      -
   1614B  VAL*     4.0    18.8    -      -       +      +
   1615B  LEU*     4.4    14.8    -      -       +      -
   1618B  ILE*     5.1     4.7    -      -       +      -
   1668B  SER      5.8     0.2    -      -       -      -
   1669B  PHE*     3.5    65.7    -      +       +      -
   1672B  VAL*     3.6    28.0    -      -       +      -
   1673B  MET*     3.9    19.1    -      -       +      -
   1686B  VAL*     5.5     3.1    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with GLU1550 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1495B  PRO*     4.6    10.0    -      -       +      +
   1496B  ARG*     3.1    50.4    +      -       -      +
   1548B  ASP*     3.3    12.6    +      -       -      +
   1549B  PHE*     1.3    79.6    -      -       +      +
   1551B  THR*     1.3    58.0    +      -       -      +
   1554B  PHE*     2.9    27.8    +      -       -      +
   1672B  VAL*     3.9    33.1    -      -       +      +
   1676B  HIS*     3.1    23.6    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with THR1551 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1495B  PRO*     4.5    16.0    -      -       +      +
   1541B  VAL*     3.8    22.4    -      -       +      -
   1542B  LEU*     4.5     5.4    -      -       +      -
   1545B  ARG*     3.7    37.9    -      -       +      +
   1548B  ASP*     2.9    29.2    +      -       -      +
   1549B  PHE      3.3     0.4    -      -       -      -
   1550B  GLU*     1.3    78.7    -      -       -      +
   1552B  VAL*     1.3    63.0    +      -       -      +
   1554B  PHE*     3.2     1.9    +      -       -      +
   1555B  TRP*     3.1    32.1    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with VAL1552 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1542B  LEU*     3.9    13.2    -      -       +      -
   1545B  ARG      4.4     3.8    -      -       -      +
   1546B  GLY      3.8    19.7    -      -       -      +
   1548B  ASP      3.2    17.9    +      -       -      +
   1549B  PHE*     3.8     3.1    -      -       -      +
   1551B  THR*     1.3    75.4    -      -       -      +
   1553B  SER*     1.3    58.0    +      -       -      +
   1555B  TRP      3.9     0.2    -      -       -      -
   1556B  LEU*     3.0    29.9    +      -       +      +
   1607B  ILE*     3.6    33.1    -      -       +      +
   1610B  GLN*     3.9    17.9    -      -       +      +
   1611B  LEU*     3.7    25.6    -      -       +      +
   1614B  VAL*     4.6     4.7    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER1553 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1549B  PHE*     2.8    26.5    +      -       -      -
   1550B  GLU      3.8     1.3    -      -       -      -
   1552B  VAL*     1.3    74.0    -      -       -      +
   1554B  PHE*     1.3    60.9    +      -       -      +
   1556B  LEU*     4.5     0.2    -      -       -      -
   1557B  SER*     2.8    29.1    +      -       -      -
   1611B  LEU*     3.8    12.1    -      -       -      +
   1672B  VAL*     4.0     6.9    -      -       -      +
   1673B  MET*     3.7    13.3    -      -       -      +
   1676B  HIS*     3.0    19.8    +      -       -      -
   1678B  MET*     3.3    25.9    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE1554 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1493B  LEU*     3.6    24.5    -      -       +      -
   1495B  PRO*     4.1    25.8    -      -       +      -
   1500B  VAL*     3.5    33.9    -      -       +      -
   1505B  GLY      5.9     2.0    -      -       -      -
   1507B  PRO*     3.9     8.3    -      -       +      -
   1550B  GLU      2.9    18.8    +      -       -      +
   1551B  THR      3.6     4.0    -      -       -      +
   1553B  SER*     1.3    78.3    -      -       -      +
   1555B  TRP*     1.3    85.6    +      +       -      +
   1557B  SER*     3.4     2.8    +      -       -      -
   1558B  ASN*     2.6    59.7    +      -       -      -
   1676B  HIS*     3.3    34.5    +      +       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with TRP1555 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1489B  LEU      3.3    22.9    -      -       -      -
   1490B  ILE*     3.3    45.0    +      -       +      -
   1493B  LEU*     4.4    12.5    +      -       +      -
   1495B  PRO*     5.5     2.4    -      -       -      +
   1507B  PRO*     4.4     9.4    -      -       +      -
   1508B  ALA      6.0     0.2    -      -       -      -
   1511B  LEU*     5.4     4.3    -      -       +      -
   1538B  ILE*     4.5    30.1    -      -       +      -
   1541B  VAL*     3.8    29.4    -      -       +      +
   1542B  LEU*     4.3    15.7    -      -       +      -
   1551B  THR*     3.1    29.0    +      -       +      +
   1554B  PHE*     1.3   100.5    -      +       +      +
   1556B  LEU*     1.3    60.1    +      -       -      +
   1557B  SER      3.3     0.2    -      -       -      -
   1558B  ASN*     3.9    22.0    -      -       +      +
   1559B  THR*     2.6    35.7    +      -       -      -
   1607B  ILE*     3.9     3.4    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1556 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1552B  VAL*     3.0    18.8    +      -       +      +
   1553B  SER      3.8     4.3    -      -       -      +
   1555B  TRP*     1.3    78.0    -      -       -      +
   1557B  SER*     1.3    63.6    +      -       -      +
   1559B  THR*     4.0     0.9    -      -       -      -
   1560B  CYS*     3.1    43.6    +      -       -      -
   1604B  ALA*     3.6    26.5    -      -       -      +
   1607B  ILE*     3.6    18.8    -      -       +      +
   1608B  TYR*     3.9    20.9    -      -       +      +
   1611B  LEU*     3.9    18.8    -      -       +      -
   1678B  MET*     3.9    22.2    -      -       +      -
   1682B  LEU*     4.0    20.9    -      -       +      -
   1827B  PHE*     4.4     1.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with SER1557 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1505B  GLY*     5.8     2.0    -      -       -      -
   1553B  SER      2.8    18.0    +      -       -      -
   1554B  PHE      3.5     9.0    -      -       -      -
   1555B  TRP      3.3     0.2    -      -       -      -
   1556B  LEU*     1.3    79.4    -      -       -      +
   1558B  ASN*     1.3    60.2    +      -       -      +
   1560B  CYS*     3.5     5.4    +      -       -      +
   1561B  ARG*     3.1    27.3    +      -       -      +
   1676B  HIS*     3.8    24.7    -      -       -      +
   1677B  GLY      4.6     2.5    -      -       -      +
   1678B  MET*     3.3    36.1    +      -       -      +
   1679B  ASP*     5.7     0.8    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with ASN1558 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1505B  GLY*     3.2    21.2    -      -       -      +
   1507B  PRO*     3.2    27.6    -      -       -      +
   1508B  ALA*     3.2    17.4    +      -       +      +
   1538B  ILE*     5.9     0.7    -      -       -      -
   1554B  PHE*     2.6    62.4    +      -       -      +
   1555B  TRP*     3.9    20.6    -      -       +      -
   1557B  SER*     1.3    78.9    -      -       -      +
   1559B  THR*     1.3    61.4    +      -       -      +
   1561B  ARG*     4.3     1.8    -      -       -      -
   1562B  PHE*     2.8    27.6    +      -       -      +
   1676B  HIS      5.4     1.4    +      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with THR1559 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1538B  ILE*     3.6    23.3    -      -       +      +
   1555B  TRP*     2.6    25.8    +      -       -      -
   1556B  LEU      4.0     2.7    -      -       -      -
   1558B  ASN*     1.3    77.1    -      -       -      +
   1560B  CYS*     1.3    57.6    +      -       -      +
   1562B  PHE*     3.4     7.9    +      -       -      +
   1563B  LEU*     3.0    27.5    +      -       +      +
   1600B  LEU*     4.1    36.5    -      -       +      +
   1603B  LEU*     4.2    12.1    -      -       +      -
   1604B  ALA*     4.5     8.1    -      -       +      -
   1607B  ILE*     3.6    16.7    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS1560 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1556B  LEU*     3.1    28.0    +      -       -      +
   1557B  SER*     3.7     5.6    -      -       -      +
   1559B  THR*     1.3    81.1    -      -       -      +
   1561B  ARG*     1.3    56.0    +      -       -      +
   1563B  LEU*     3.2     9.7    +      -       -      +
   1564B  HIS*     2.8    38.6    +      -       +      +
   1604B  ALA*     4.4     7.9    -      -       -      -
   1679B  ASP*     3.7    18.6    -      -       -      +
   1682B  LEU*     3.9    25.8    -      -       -      -
   1827B  PHE*     3.9    23.6    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with ARG1561 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1505B  GLY*     4.1    10.8    -      -       -      +
   1508B  ALA*     3.6    15.7    -      -       +      -
   1509B  TYR*     3.6    43.6    +      -       +      -
   1557B  SER      3.1    17.9    +      -       -      +
   1558B  ASN*     3.8     6.1    -      -       -      +
   1559B  THR      3.3     0.2    -      -       -      -
   1560B  CYS*     1.3    73.0    -      -       -      +
   1562B  PHE*     1.3    60.2    +      -       -      +
   1564B  HIS*     3.1    27.1    +      -       +      +
   1565B  CYS*     2.9    32.1    +      -       -      -
   1568B  GLN*     4.6     2.2    +      -       -      -
   1679B  ASP*     4.4     1.8    +      -       -      -
   1830B  ASN      2.8    30.7    +      -       -      -
   1831B  PRO*     4.1     0.6    -      -       -      +
   1832B  SER*     3.7    15.3    +      -       -      +
    130D  HIS*     3.5    20.7    +      -       -      +
    131D  LEU*     3.5    20.0    -      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with PHE1562 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1508B  ALA*     3.5    26.4    -      -       +      +
   1511B  LEU*     3.7    27.6    -      -       +      -
   1512B  PHE*     3.7    20.2    -      -       +      -
   1515B  VAL*     4.3     6.7    -      -       +      -
   1531B  LEU*     3.9    25.8    -      -       +      -
   1534B  THR*     4.4    21.3    -      -       +      -
   1535B  ILE*     6.1     1.1    -      -       +      -
   1538B  ILE*     5.9     3.6    -      -       +      -
   1558B  ASN      2.8    18.5    +      -       -      +
   1559B  THR*     3.6     6.1    -      -       -      +
   1561B  ARG*     1.3    74.8    -      -       -      +
   1563B  LEU*     1.3    60.8    +      -       -      +
   1565B  CYS*     3.5     3.8    +      -       -      +
   1566B  LEU*     3.2    36.7    +      -       +      +
   1600B  LEU*     3.5    39.3    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1563 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1559B  THR*     3.0    14.8    +      -       +      +
   1560B  CYS*     3.4    14.4    -      -       -      +
   1561B  ARG      3.2     0.2    -      -       -      -
   1562B  PHE*     1.3    77.0    -      -       -      +
   1564B  HIS*     1.3    66.7    +      -       +      +
   1566B  LEU*     3.3     5.3    +      -       +      +
   1567B  LYS*     3.1    54.9    +      -       -      +
   1597B  ARG*     3.6    42.8    -      -       +      +
   1600B  LEU*     4.2    15.7    -      -       +      +
   1601B  SER*     4.1    27.8    -      -       -      +
   1604B  ALA*     5.5     4.9    -      -       +      -
   1827B  PHE*     6.2     5.6    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with HIS1564 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1560B  CYS*     2.8    28.8    +      -       +      -
   1561B  ARG*     3.1    53.6    +      -       -      +
   1563B  LEU*     1.3    81.6    -      -       +      +
   1565B  CYS*     1.3    51.4    +      -       -      +
   1567B  LYS*     3.3     2.3    +      -       -      +
   1568B  GLN*     2.8    38.4    +      -       -      +
   1679B  ASP*     3.0    31.5    +      -       -      -
   1828B  PRO      3.2    28.0    -      -       -      -
   1829B  PHE*     3.5    14.5    -      -       -      -
   1830B  ASN      3.4    26.3    +      -       -      +
   1831B  PRO      5.0     0.2    -      -       -      -
----------------------------------------------------------
 Back to top of page

Residues in contact with CYS1565 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1508B  ALA      4.7     1.6    -      -       -      -
   1509B  TYR*     3.8    39.3    -      -       -      -
   1512B  PHE*     3.7    37.2    -      -       +      -
   1561B  ARG*     2.9    23.8    +      -       -      -
   1562B  PHE      3.7     7.9    -      -       -      +
   1563B  LEU      3.2     0.2    -      -       -      -
   1564B  HIS*     1.3    76.0    -      -       -      +
   1566B  LEU*     1.3    59.0    +      -       -      +
   1568B  GLN*     4.4     3.6    -      -       -      -
   1569B  TYR*     2.9    48.9    +      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with LEU1566 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1512B  PHE*     3.6    28.0    -      -       +      -
   1515B  VAL*     4.6     4.7    -      -       +      -
   1531B  LEU*     4.9     6.3    -      -       +      -
   1562B  PHE*     3.2    33.7    +      -       +      +
   1563B  LEU*     3.3     6.0    +      -       -      +
   1565B  CYS*     1.3    76.9    -      -       -      +
   1567B  LYS*     1.3    57.3    +      -       -      +
   1569B  TYR      3.9     0.5    -      -       -      -
   1570B  SER*     3.1    27.2    +      -       -      -
   1588B  LEU*     5.0     4.0    -      -       +      +
   1593B  LEU*     4.2    25.8    -      -       +      -
   1596B  TYR*     5.4     3.4    -      -       +      +
   1597B  ARG*     4.0    29.5    +      -       +      +
   1600B  LEU*     3.6    31.2    -      -       +      -
----------------------------------------------------------
 Back to top of page

Residues in contact with LYS1567 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1563B  LEU*     3.1    43.8    +      -       +      +
   1564B  HIS*     5.1     1.7    +      -       -      +
   1566B  LEU*     1.3    75.1    -      -       -      +
   1568B  GLN*     1.3    65.7    +      -       -      +
   1569B  TYR      3.2     0.2    -      -       -      -
   1570B  SER*     2.7    24.4    +      -       -      -
   1575B  PHE*     3.1    43.7    -      -       +      +
   1597B  ARG*     3.8    19.3    -      -       -      +
   1601B  SER*     6.2     0.4    -      -       -      -
   1827B  PHE*     5.8     2.2    +      -       -      +
   1828B  PRO      5.1     5.1    +      -       -      -
   1829B  PHE*     3.5    43.5    -      -       +      +
----------------------------------------------------------
 Back to top of page

Residues in contact with GLN1568 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1509B  TYR*     5.9     0.5    -      -       -      -
   1561B  ARG*     4.6     2.9    +      -       -      -
   1564B  HIS      2.8    22.4    +      -       -      +
   1565B  CYS*     4.0     4.6    -      -       -      +
   1567B  LYS*     1.3    73.2    -      -       -      +
   1569B  TYR*     1.3    76.7    +      -       +      +
   1575B  PHE      3.7     9.9    -      -       -      -
   1576B  MET*     3.5    11.1    -      -       -      +
   1578B  HIS      5.2     1.0    +      -       -      -
   1579B  ASN*     2.8    50.9    +      -       -      +
   1583B  GLN*     3.4    18.8    +      -       -      +
   1587B  CYS*     3.9     0.3    -      -       -      -
   1829B  PHE*     3.8     1.7    -      -       -      -
   1831B  PRO*     3.4    20.7    -      -       +      +
   1832B  SER*     2.9    45.3    +      -       -      +
----------------------------------------------------------
 Back to top of page

Residues in contact with TYR1569 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1509B  TYR*     5.8     2.1    -      +       -      -
   1512B  PHE*     3.3    33.6    -      +       +      -
   1565B  CYS*     2.9    26.2    +      -       +      -
   1566B  LEU      3.9     4.0    -      -       -      -
   1568B  GLN*     1.3   102.0    +      -       +      +
   1570B  SER*     1.3    56.5    +      -       -      +
   1571B  GLY      3.4     2.7    -      -       -      -
   1583B  GLN*     3.2    61.3    +      -       +      +
   1586B  HIS*     3.7    22.4    +      -       +      +
   1587B  CYS*     3.6    12.6    -      -       -      -
   1588B  LEU*     3.0    29.5    +      -       -      +
   1832B  SER*     5.5     1.0    +      -       -      -
   1834B  LEU      3.5    11.8    +      -       -      -
   1836B  LEU*     3.9    19.8    +      -       +      +
----------------------------------------------------------
 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