Contacts of the helix formed by residues 1674 - 1698 (chain B) in PDB entry 4LX0


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 ASP1674 (chain B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1554B  CYS*     3.9    14.2    -      -       -      +
   1555B  ARG*     4.7     1.6    +      -       -      -
   1558B  HIS*     2.8    32.7    +      -       -      -
   1672B  GLY      3.5     2.2    +      -       -      +
   1673B  LEU*     1.3    77.6    -      -       -      +
   1675B  PRO*     1.3    69.1    -      -       -      +
   1677B  ILE*     2.9    33.9    +      -       +      +
   1678B  ILE*     3.2     9.9    +      -       -      +
   1823B  PRO*     3.9    13.2    -      -       +      +
   1825B  ASN*     2.7    29.3    +      -       -      +
    130C  HIS*     3.5    12.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with PRO1675 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1673B  LEU      3.3     3.8    -      -       -      +
   1674B  ASP*     1.3    83.6    -      -       -      +
   1676B  GLU*     1.3    77.7    +      -       -      +
   1678B  ILE*     3.3    13.3    +      -       +      +
   1679B  LEU*     3.0    32.6    +      -       +      +
    127C  ASP      5.9     3.1    -      -       -      +
    130C  HIS*     3.4    38.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1676 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1675B  PRO*     1.3    89.9    -      -       -      +
   1677B  ILE*     1.3    60.9    +      -       -      +
   1679B  LEU*     3.5    14.8    +      -       +      +
   1680B  GLN*     2.8    36.7    +      -       -      +
   1821B  LEU      4.9     1.1    -      -       -      +
   1823B  PRO*     3.4    32.9    -      -       +      +
   1825B  ASN*     3.1    31.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1677 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1550B  LEU*     4.1     5.2    -      -       +      -
   1554B  CYS*     3.8    16.6    -      -       -      -
   1602B  TYR*     4.1    26.9    -      -       +      -
   1673B  LEU*     3.7    30.5    -      -       +      -
   1674B  ASP*     2.9    30.2    +      -       +      +
   1676B  GLU*     1.3    75.2    -      -       -      +
   1678B  ILE*     1.3    66.0    +      -       -      +
   1680B  GLN*     3.0    12.2    +      -       -      +
   1681B  VAL*     2.9    23.6    +      -       +      +
   1820B  VAL*     5.2     1.1    -      -       +      -
   1822B  PHE*     3.5    35.7    -      -       +      -
   1823B  PRO*     4.3     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1678 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1665B  HIS*     3.8    24.9    -      -       +      +
   1668B  MET*     3.8    45.5    -      -       +      -
   1669B  CYS*     4.2    16.4    -      -       -      +
   1673B  LEU*     3.8    23.6    -      -       +      +
   1674B  ASP      3.2     8.3    +      -       -      +
   1675B  PRO*     3.5    14.4    -      -       +      +
   1677B  ILE*     1.3    78.4    -      -       -      +
   1679B  LEU*     1.3    60.8    +      -       -      +
   1681B  VAL*     3.1    17.2    +      -       -      +
   1682B  PHE*     3.2    17.3    +      -       +      -
   1728B  LEU*     4.0    13.2    -      -       +      -
    129C  ARG*     5.6     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1679 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1675B  PRO*     3.0    23.9    +      -       +      +
   1676B  GLU*     3.7    16.6    -      -       +      +
   1677B  ILE      3.2     0.2    -      -       -      -
   1678B  ILE*     1.3    75.4    -      -       -      +
   1680B  GLN*     1.3    58.9    +      -       +      +
   1682B  PHE*     3.3     2.0    +      -       -      -
   1683B  LYS*     3.0    24.1    +      -       -      +
   1727B  ASN      4.3     6.1    -      -       -      +
   1728B  LEU*     3.9    29.8    -      -       +      -
   1730B  GLN*     4.7     9.4    -      -       +      +
   1731B  SER*     3.2    44.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1680 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1602B  TYR*     3.6    15.3    +      -       +      +
   1676B  GLU*     2.8    30.1    +      -       -      +
   1677B  ILE*     3.0    12.5    +      -       -      +
   1679B  LEU*     1.3    78.9    -      -       +      +
   1681B  VAL*     1.3    64.5    +      -       -      +
   1683B  LYS*     3.7    13.4    -      -       +      +
   1684B  GLN*     3.0    23.9    +      -       -      +
   1731B  SER      5.4     0.9    -      -       -      +
   1818B  PHE*     5.8     0.3    -      -       -      -
   1819B  PRO      4.1     3.1    -      -       -      +
   1820B  VAL*     3.4    14.8    -      -       +      +
   1821B  LEU*     2.9    49.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1681 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1543B  PHE*     5.4     6.5    -      -       +      -
   1602B  TYR*     4.0    21.5    -      -       +      -
   1605B  LEU*     4.1    15.3    -      -       +      -
   1606B  ILE*     4.2    13.0    -      -       +      -
   1609B  ALA*     5.5     1.3    -      -       +      -
   1664B  PHE*     6.1     0.4    -      -       +      -
   1668B  MET*     3.9    35.2    -      -       +      -
   1677B  ILE*     2.9    22.2    +      -       +      +
   1678B  ILE      3.1     8.0    +      -       -      +
   1680B  GLN*     1.3    75.6    -      -       -      +
   1682B  PHE*     1.3    61.1    +      -       +      +
   1684B  GLN*     3.1     5.7    +      -       -      +
   1685B  LEU*     3.0    43.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE1682 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1661B  MET*     3.6    38.1    -      -       +      -
   1664B  PHE*     4.3     3.6    -      -       +      -
   1665B  HIS*     3.8    26.0    -      +       +      -
   1668B  MET*     3.4    29.2    -      -       +      -
   1678B  ILE*     3.2    24.3    +      -       +      +
   1679B  LEU*     4.1     3.8    -      -       -      +
   1680B  GLN      3.2     0.2    -      -       -      -
   1681B  VAL*     1.3    75.8    -      -       +      +
   1683B  LYS*     1.3    64.8    +      -       -      +
   1684B  GLN      3.1     0.9    -      -       -      -
   1685B  LEU*     4.2    18.8    -      -       +      +
   1686B  PHE*     2.9    31.3    +      +       +      +
   1722B  TRP*     3.5    24.5    -      +       -      -
   1723B  LEU*     4.7    10.8    -      -       +      -
   1728B  LEU*     3.8    20.4    -      -       +      -
   1731B  SER*     5.1     2.9    -      -       -      +
   1733B  ALA*     4.2     3.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS1683 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1679B  LEU      3.0    12.2    +      -       -      +
   1680B  GLN*     3.7    13.9    -      -       +      +
   1682B  PHE*     1.3    76.4    -      -       -      +
   1684B  GLN*     1.3    61.2    +      -       -      +
   1686B  PHE*     3.6     0.9    +      -       -      +
   1687B  TYR*     3.0    21.7    +      -       -      +
   1731B  SER      3.5    27.8    -      -       -      +
   1732B  GLY*     4.2     7.9    -      -       -      -
   1733B  ALA*     3.9    13.6    -      -       -      +
   1736B  THR*     3.7    20.2    -      -       +      +
   1818B  PHE*     3.9    45.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN1684 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1602B  TYR*     4.3     5.0    +      -       -      +
   1606B  ILE*     3.8    32.5    -      -       +      -
   1610B  GLU*     3.7    11.8    +      -       -      +
   1680B  GLN      3.0    15.4    +      -       -      +
   1681B  VAL      3.3     9.0    -      -       -      +
   1682B  PHE      3.1     0.2    -      -       -      -
   1683B  LYS*     1.3    78.5    -      -       -      +
   1685B  LEU*     1.3    62.1    +      -       +      +
   1687B  TYR*     3.4    15.0    -      -       -      +
   1688B  MET*     3.2    18.0    +      -       -      +
   1816B  HIS      2.7    26.7    +      -       -      -
   1817B  MET*     3.4    13.8    -      -       -      +
   1818B  PHE*     2.9    42.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1685 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1606B  ILE*     4.8     7.0    -      -       +      +
   1609B  ALA*     3.8    32.1    -      -       +      -
   1610B  GLU*     3.8    25.1    -      -       +      +
   1613B  LEU*     4.1    24.1    -      -       +      +
   1661B  MET*     4.7     4.0    -      -       -      -
   1664B  PHE*     4.3     9.4    -      -       +      -
   1681B  VAL*     3.0    35.8    +      -       +      +
   1682B  PHE*     3.1    23.5    +      -       +      +
   1684B  GLN*     1.3    74.4    -      -       -      +
   1686B  PHE*     1.3    71.3    +      -       +      +
   1688B  MET*     3.0    16.0    +      -       -      +
   1689B  ILE*     3.1    18.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1686 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1661B  MET*     3.7    30.7    -      -       +      -
   1682B  PHE*     2.9    23.5    +      +       +      +
   1683B  LYS      3.9     0.4    -      -       -      +
   1685B  LEU*     1.3    73.5    -      -       +      +
   1687B  TYR*     1.3    66.3    +      -       -      +
   1689B  ILE*     3.2    12.5    +      -       +      +
   1690B  ASN*     3.0    22.7    +      -       -      +
   1719B  LEU*     3.8    33.9    -      -       +      -
   1720B  GLU*     5.2     0.4    -      -       -      -
   1722B  TRP*     3.9    15.0    -      +       -      -
   1723B  LEU*     3.6    36.3    -      -       +      -
   1733B  ALA*     3.7    34.3    -      -       +      +
   1734B  VAL*     5.2     0.4    -      -       -      -
   1736B  THR*     3.5     3.4    +      -       -      +
   1737B  MET*     3.6    23.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR1687 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1683B  LYS      3.0     9.1    +      -       -      +
   1684B  GLN*     3.4    24.0    -      -       -      +
   1686B  PHE*     1.3    76.0    -      -       -      +
   1688B  MET*     1.3    68.1    +      -       -      +
   1690B  ASN*     3.3    18.5    +      -       -      +
   1691B  ALA*     3.0    25.8    +      -       +      +
   1736B  THR*     3.3    18.5    +      -       -      -
   1812B  LEU*     4.4     7.6    -      -       +      +
   1813B  ASP*     2.6    37.4    +      -       -      +
   1814B  ALA*     4.0    11.7    -      -       -      -
   1816B  HIS*     3.6    26.3    -      +       +      +
   1818B  PHE*     3.5    35.2    -      +       +      -
----------------------------------------------------------
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Residues in contact with MET1688 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1610B  GLU*     3.5    57.2    -      -       -      +
   1613B  LEU*     4.6     7.4    -      -       -      -
   1614B  GLN*     4.4    11.0    -      -       -      +
   1617B  ILE*     4.0    17.5    -      -       +      -
   1684B  GLN      3.2     9.1    +      -       -      +
   1685B  LEU*     3.0    14.4    +      -       -      +
   1687B  TYR*     1.3    86.8    -      -       -      +
   1689B  ILE*     1.3    57.1    +      -       -      +
   1691B  ALA*     3.2     1.7    +      -       -      +
   1692B  VAL*     2.8    41.7    +      -       +      +
   1814B  ALA      4.3    11.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1689 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1613B  LEU*     4.9     7.4    -      -       +      -
   1617B  ILE*     4.0    25.4    -      -       +      -
   1621B  MET*     4.1    29.2    -      -       +      -
   1657B  ILE*     4.4    22.2    -      -       +      -
   1661B  MET*     4.7     8.7    -      -       -      -
   1685B  LEU      3.1    14.8    +      -       -      +
   1686B  PHE*     3.2    22.9    +      -       +      +
   1688B  MET*     1.3    71.7    -      -       -      +
   1690B  ASN*     1.3    65.5    +      -       -      +
   1693B  THR*     2.7    38.9    +      -       -      +
   1719B  LEU*     4.3    19.3    -      -       +      -
   1737B  MET*     4.7     5.8    -      -       -      -
   1740B  LEU*     5.1     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN1690 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1686B  PHE      3.0    11.7    +      -       -      +
   1687B  TYR*     3.3    16.4    +      -       -      +
   1689B  ILE*     1.3    77.4    -      -       -      +
   1691B  ALA*     1.3    58.4    +      -       -      +
   1693B  THR*     4.0     0.5    -      -       -      -
   1694B  LEU*     2.9    33.0    +      -       -      +
   1736B  THR      3.1    26.9    +      -       -      +
   1737B  MET*     3.4    11.1    -      -       -      -
   1739B  PRO*     3.5    10.1    -      -       -      +
   1740B  LEU*     3.1    41.2    +      -       -      +
   1812B  LEU*     3.4    25.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1691 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1687B  TYR*     3.0    25.7    +      -       +      +
   1688B  MET      4.0     1.1    -      -       -      +
   1690B  ASN*     1.3    78.3    -      -       -      +
   1692B  VAL*     1.3    61.0    +      -       -      +
   1695B  ASN*     2.8    37.1    +      -       -      -
   1812B  LEU*     3.8    26.7    -      -       +      -
   1814B  ALA*     3.8    27.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL1692 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1614B  GLN*     3.7    34.3    -      -       -      +
   1617B  ILE*     3.9    30.5    -      -       +      -
   1618B  VAL*     4.1    14.4    -      -       +      -
   1688B  MET*     2.8    29.1    +      -       +      +
   1691B  ALA*     1.3    75.7    -      -       -      +
   1693B  THR*     1.3    65.1    +      -       -      +
   1695B  ASN*     3.5     4.6    +      -       -      +
   1696B  ASN*     3.2    20.4    +      -       -      +
   1814B  ALA*     4.0    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR1693 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1617B  ILE*     3.2    18.7    -      -       -      +
   1618B  VAL*     5.2     2.7    -      -       -      +
   1621B  MET*     3.7    21.1    -      -       +      +
   1622B  LEU*     3.8    29.7    -      -       +      +
   1689B  ILE*     2.7    23.9    +      -       -      +
   1692B  VAL*     1.3    75.1    -      -       -      +
   1694B  LEU*     1.3    67.6    +      -       -      +
   1696B  ASN*     3.1    13.0    +      -       -      +
   1697B  LEU*     3.1    11.8    +      -       -      +
   1712B  LEU*     3.9     7.9    -      -       +      -
   1740B  LEU*     3.7    24.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1694 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1690B  ASN      2.9    20.5    +      -       -      +
   1691B  ALA*     4.1     2.9    -      -       -      +
   1693B  THR*     1.3    76.8    -      -       -      +
   1695B  ASN*     1.3    64.1    +      -       -      +
   1697B  LEU*     3.2    12.3    +      -       +      +
   1698B  LEU*     3.0    43.1    +      -       +      +
   1739B  PRO*     3.8    29.4    -      -       +      +
   1740B  LEU*     3.7    11.8    -      -       +      +
   1743B  ALA*     3.8    29.6    -      -       +      -
   1767B  LEU*     4.1    11.7    -      -       +      -
   1771B  GLN*     4.7     5.8    -      -       -      +
   1775B  ILE*     4.5     4.3    -      -       +      -
   1812B  LEU*     3.8    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN1695 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1691B  ALA      2.8    31.9    +      -       -      +
   1692B  VAL*     3.9     5.1    -      -       -      +
   1693B  THR      3.2     0.2    -      -       -      -
   1694B  LEU*     1.3    74.9    -      -       -      +
   1696B  ASN*     1.3    62.5    +      -       -      +
   1698B  LEU*     3.5    11.5    +      -       -      +
   1699B  LEU*     3.6    19.3    +      -       -      +
   1811B  LEU*     3.5    27.0    -      -       +      +
   1812B  LEU*     2.8    52.5    +      -       -      +
   1814B  ALA*     4.6     8.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN1696 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1618B  VAL*     3.4    28.8    -      -       +      +
   1622B  LEU*     3.5     8.7    -      -       +      +
   1692B  VAL      3.2    14.8    +      -       -      +
   1693B  THR      3.1     4.3    +      -       -      +
   1695B  ASN*     1.3    76.6    -      -       -      +
   1697B  LEU*     1.3    65.5    +      -       -      +
   1699B  LEU*     3.0    20.0    +      -       -      +
   1700B  ARG*     2.7    57.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1697 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1622B  LEU*     4.2    11.8    -      -       +      +
   1693B  THR      3.1    10.3    +      -       -      +
   1694B  LEU*     3.5    11.2    -      -       +      +
   1696B  ASN*     1.3    79.6    +      -       -      +
   1698B  LEU*     1.3    58.5    +      -       -      +
   1699B  LEU      3.1     4.2    +      -       -      -
   1700B  ARG      3.3     9.2    +      -       -      +
   1703B  VAL*     4.1    17.0    -      -       +      -
   1704B  CYS*     3.5    20.3    -      -       -      -
   1708B  THR*     5.4     0.7    -      -       +      -
   1712B  LEU*     3.8    28.9    -      -       +      -
   1740B  LEU*     4.5     7.9    -      -       +      -
   1743B  ALA*     4.4    12.6    -      -       +      -
   1747B  LEU*     4.4    13.9    -      -       +      -
   1775B  ILE*     3.7    33.4    -      -       +      -
   1778B  LEU*     3.3     9.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1698 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1694B  LEU*     3.0    38.1    +      -       +      +
   1695B  ASN*     3.8    11.9    -      -       -      +
   1696B  ASN      3.2     0.8    -      -       -      -
   1697B  LEU*     1.3    73.0    -      -       -      +
   1699B  LEU*     1.3    61.0    +      -       -      +
   1771B  GLN*     3.8    28.9    -      -       +      +
   1774B  LYS*     3.3    42.6    +      -       +      +
   1775B  ILE*     3.8    28.3    -      -       +      -
   1778B  LEU*     3.4     7.5    -      -       -      +
   1810B  LEU*     3.8    27.2    -      -       +      +
   1811B  LEU*     4.1    15.7    -      -       +      -
   1812B  LEU      5.3     0.2    -      -       -      +
----------------------------------------------------------
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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