Contacts of the helix formed by residues 1639 - 1665 (chain A) in PDB entry 5XJY


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 THR1639 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    524A  MET*     3.8    14.8    -      -       -      +
    527A  LEU*     5.3     9.8    -      -       +      +
    528A  ASP*     3.7    23.3    +      -       -      +
   1638A  LEU*     1.3    79.5    -      -       -      +
   1640A  LYS*     1.3    81.9    +      -       -      +
   1641A  GLN*     3.5    24.6    +      -       +      +
   1642A  GLN*     3.6    23.7    -      -       +      +
   1643A  LEU*     3.2    24.0    +      -       -      +
   1837A  GLU*     5.6     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS1640 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    524A  MET*     6.6     0.2    -      -       -      -
    528A  ASP*     6.0     1.3    -      -       -      +
   1639A  THR*     1.3    87.4    +      -       -      +
   1641A  GLN*     1.3    71.6    +      -       -      +
   1643A  LEU*     3.9     3.0    -      -       -      +
   1644A  SER*     2.9    31.9    +      -       -      -
   1834A  ARG*     4.3    18.4    -      -       +      +
   1837A  GLU*     2.7    29.6    +      -       -      -
   1838A  ASN*     3.3    21.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1641 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    528A  ASP*     5.5     2.0    +      -       -      -
   1639A  THR*     3.4    18.2    +      -       +      +
   1640A  LYS*     1.3    92.3    -      -       -      +
   1642A  GLN*     1.3    69.1    +      -       -      +
   1644A  SER*     3.7     6.0    -      -       -      -
   1645A  GLU*     2.9    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1642 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    560A  ILE*     5.3    13.2    -      -       +      +
    561A  ASP*     5.4     9.3    +      -       -      +
    565A  ARG*     5.7     2.8    +      -       -      -
   1374A  TYR*     5.4     5.0    -      -       -      -
   1638A  LEU*     3.6    29.7    -      -       +      +
   1639A  THR*     3.6    19.1    -      -       +      +
   1640A  LYS      3.3     0.2    -      -       -      -
   1641A  GLN*     1.3    84.5    +      -       -      +
   1643A  LEU*     1.3    60.5    +      -       -      +
   1645A  GLU*     3.3     9.0    +      -       -      +
   1646A  VAL*     3.0    35.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1643 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1372A  GLY*     6.6     0.2    -      -       -      -
   1638A  LEU*     3.9    27.1    -      -       +      +
   1639A  THR      3.2    22.2    +      -       -      +
   1640A  LYS*     4.1     4.0    -      -       -      +
   1642A  GLN*     1.3    75.6    -      -       -      +
   1644A  SER*     1.3    57.9    +      -       -      +
   1646A  VAL*     3.3    14.3    -      -       +      +
   1647A  ALA*     3.0    28.4    +      -       -      +
   1833A  GLU*     3.3    41.4    -      -       +      +
   1837A  GLU*     4.1    31.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER1644 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1640A  LYS      2.9    20.5    +      -       -      -
   1641A  GLN*     3.7     8.5    -      -       -      -
   1643A  LEU*     1.3    77.0    -      -       -      +
   1645A  GLU*     1.3    57.9    +      -       -      +
   1647A  ALA*     3.2     7.0    +      -       -      +
   1648A  LEU*     3.0    38.9    +      -       -      +
   1830A  ASP*     5.0     7.5    +      -       -      -
   1833A  GLU*     4.9     4.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU1645 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1641A  GLN      2.9    18.4    +      -       -      +
   1642A  GLN*     3.3    12.7    +      -       -      +
   1644A  SER*     1.3    77.1    -      -       -      +
   1646A  VAL*     1.3    60.6    +      -       +      +
   1648A  LEU*     3.1    17.8    +      -       -      +
   1649A  MET*     3.0    53.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1646 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1371A  PHE*     3.5    32.5    -      -       +      +
   1372A  GLY*     4.9     7.4    -      -       -      -
   1374A  TYR*     4.8    12.6    -      -       +      +
   1638A  LEU*     4.3    16.2    -      -       +      -
   1642A  GLN*     3.0    16.6    +      -       -      +
   1643A  LEU*     3.3    26.5    -      -       +      +
   1645A  GLU*     1.3    75.1    -      -       +      +
   1647A  ALA*     1.3    61.9    +      -       -      +
   1649A  MET*     3.9     9.0    -      -       +      +
   1650A  THR*     2.8    35.7    +      -       -      +
   1833A  GLU*     6.5     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1647 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1643A  LEU      3.0    16.0    +      -       -      +
   1644A  SER*     3.2    13.0    +      -       -      +
   1646A  VAL*     1.3    78.3    -      -       -      +
   1648A  LEU*     1.3    56.2    +      -       +      +
   1650A  THR*     3.6     4.1    +      -       -      -
   1651A  THR*     2.7    38.4    +      -       -      +
   1826A  GLN*     5.7     2.7    -      -       +      +
   1829A  ALA*     5.2     7.4    -      -       +      +
   1830A  ASP*     4.5    26.5    -      -       +      +
   1833A  GLU*     4.6     9.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1648 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1644A  SER*     3.0    31.7    +      -       -      +
   1645A  GLU*     3.1    24.4    +      -       -      +
   1647A  ALA*     1.3    80.0    -      -       +      +
   1649A  MET*     1.3    64.4    +      -       +      +
   1651A  THR*     3.3     9.6    -      -       +      +
   1652A  SER*     3.1    20.4    +      -       -      -
   1788A  LEU*     4.7    19.5    -      -       +      -
   1826A  GLN*     4.5    25.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET1649 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1371A  PHE*     4.7    26.2    -      -       +      -
   1645A  GLU*     3.0    44.8    +      -       +      +
   1646A  VAL*     3.9     8.7    -      -       +      +
   1647A  ALA      3.4     0.2    -      -       -      -
   1648A  LEU*     1.3    76.8    -      -       +      +
   1650A  THR*     1.3    60.2    +      -       -      +
   1652A  SER*     2.4    31.0    +      -       -      -
   1653A  VAL*     3.0    12.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR1650 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1370A  PRO*     3.6    21.7    +      -       +      +
   1371A  PHE*     4.3     6.8    -      -       +      +
   1646A  VAL*     2.8    18.3    +      -       -      +
   1647A  ALA*     4.0     5.2    -      -       -      -
   1649A  MET*     1.3    74.3    -      -       -      +
   1651A  THR*     1.3    63.0    +      -       -      +
   1653A  VAL*     3.4    11.1    +      -       +      +
   1654A  ASP*     3.0    23.1    +      -       +      +
   1829A  ALA*     5.7     9.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR1651 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1647A  ALA*     2.7    22.5    +      -       -      +
   1648A  LEU*     3.3    12.3    -      -       +      +
   1649A  MET      3.2     0.2    -      -       -      -
   1650A  THR*     1.3    76.1    -      -       -      +
   1652A  SER*     1.3    57.9    +      -       -      +
   1654A  ASP*     3.0    10.3    +      -       -      +
   1655A  VAL*     2.9    35.0    +      -       +      +
   1822A  MET*     4.0    12.1    -      -       +      +
   1825A  ASN*     4.9     2.4    +      -       +      -
   1826A  GLN*     3.6    52.9    +      -       +      +
   1829A  ALA*     5.0     3.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER1652 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1648A  LEU      3.1    10.1    +      -       -      -
   1649A  MET*     2.4    35.6    +      -       -      -
   1651A  THR*     1.3    75.8    -      -       -      +
   1653A  VAL*     1.3    61.4    +      -       -      +
   1655A  VAL*     2.8    34.3    +      -       -      +
   1656A  LEU*     3.3     5.2    +      -       -      +
   1786A  PHE*     4.8    14.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL1653 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1365A  SER*     5.1     3.3    +      -       -      +
   1368A  VAL*     4.0    36.1    -      -       +      -
   1369A  PRO      5.7     0.4    -      -       -      +
   1371A  PHE*     3.7    28.9    -      -       +      -
   1649A  MET*     3.0    14.3    +      -       +      +
   1650A  THR*     3.7    11.2    -      -       +      +
   1651A  THR      3.4     0.2    -      -       -      -
   1652A  SER*     1.3    77.7    -      -       -      +
   1654A  ASP*     1.3    56.2    +      -       -      +
   1656A  LEU*     3.3    26.5    -      -       +      +
   1657A  VAL*     4.1     4.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP1654 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1365A  SER*     5.8     0.3    -      -       -      -
   1650A  THR*     3.0    14.0    +      -       +      +
   1651A  THR*     3.0    11.2    +      -       -      +
   1653A  VAL*     1.3    75.7    -      -       -      +
   1655A  VAL*     1.3    57.6    +      -       -      +
   1656A  LEU      3.1     1.8    -      -       -      -
   1657A  VAL*     2.8    37.6    +      -       -      +
   1658A  SER      3.0     8.7    +      -       -      -
   1727A  LYS*     4.1    12.0    +      -       -      +
   1822A  MET*     3.2    28.6    -      -       -      +
   1825A  ASN*     2.8    36.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1655 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1651A  THR*     2.9    23.3    +      -       +      +
   1652A  SER*     2.8    23.7    +      -       -      +
   1654A  ASP*     1.3    67.7    -      -       -      +
   1656A  LEU*     1.3    64.7    +      -       -      +
   1658A  SER*     3.1     8.8    +      -       -      +
   1659A  ILE*     3.0    22.6    +      -       +      +
   1782A  SER*     4.8    16.4    -      -       -      -
   1785A  THR*     5.8     4.0    -      -       -      +
   1786A  PHE*     4.0    30.3    -      -       +      -
   1819A  LEU*     5.6     4.9    -      -       +      -
   1822A  MET*     3.6    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU1656 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1361A  ALA*     5.5     4.5    -      -       +      +
   1364A  PHE*     3.5    39.3    -      -       +      -
   1365A  SER*     5.1     6.7    -      -       -      +
   1368A  VAL*     6.1     0.4    -      -       +      -
   1652A  SER      3.3     6.4    +      -       -      +
   1653A  VAL*     3.3    19.5    -      -       +      +
   1654A  ASP      3.1     0.2    -      -       -      -
   1655A  VAL*     1.3    75.7    -      -       -      +
   1657A  VAL*     1.3    63.2    +      -       +      +
   1659A  ILE*     3.1    20.1    +      -       +      +
   1660A  CYS*     3.0    23.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1657 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1361A  ALA*     4.9     7.6    -      -       +      +
   1362A  LEU*     4.2    21.8    -      -       +      -
   1365A  SER*     3.3    28.0    -      -       -      +
   1653A  VAL      4.4     2.7    -      -       -      +
   1654A  ASP*     2.8    39.5    +      -       -      +
   1656A  LEU*     1.3    73.7    -      -       +      +
   1658A  SER*     1.3    62.4    +      -       -      +
   1660A  CYS*     4.4     4.3    -      -       -      +
   1661A  VAL*     3.0    39.0    +      -       +      +
   1721A  PHE*     6.0     1.6    -      -       +      -
   1727A  LYS*     4.8    17.9    -      -       +      +
   1821A  ASP*     5.7     0.4    -      -       -      -
   1822A  MET*     4.9     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1658 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1654A  ASP      3.0     6.1    +      -       -      -
   1655A  VAL*     3.2    13.9    -      -       -      +
   1657A  VAL*     1.3    77.2    -      -       -      +
   1659A  ILE*     1.3    58.7    +      -       -      +
   1661A  VAL*     4.3     1.5    -      -       -      -
   1662A  ILE*     2.9    33.1    +      -       -      +
   1818A  GLY*     3.3    30.1    +      -       -      -
   1819A  LEU*     5.1     2.9    -      -       -      +
   1821A  ASP*     4.9     4.5    -      -       -      -
   1822A  MET*     3.6    33.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1659 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1655A  VAL*     3.0    12.6    +      -       +      +
   1656A  LEU*     3.1    30.0    +      -       +      +
   1658A  SER*     1.3    78.5    +      -       -      +
   1660A  CYS*     1.3    60.9    +      -       +      +
   1662A  ILE*     3.3    14.6    -      -       +      +
   1663A  PHE*     3.0    23.7    +      -       -      +
   1775A  LEU*     4.9     7.7    -      -       +      +
   1778A  GLY*     3.5    35.2    -      -       -      +
   1779A  ILE*     3.7    20.9    -      -       +      +
   1782A  SER*     4.9     9.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with CYS1660 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1357A  PHE*     3.3    36.6    -      -       -      -
   1358A  VAL*     5.3     0.6    -      -       -      +
   1360A  ILE*     4.8     4.7    -      -       -      -
   1361A  ALA*     3.6    23.1    -      -       +      -
   1656A  LEU*     3.0    17.4    +      -       +      +
   1657A  VAL      4.2     0.9    -      -       -      +
   1658A  SER      3.2     0.2    -      -       -      -
   1659A  ILE*     1.3    80.3    -      -       +      +
   1661A  VAL*     1.3    61.3    +      -       -      +
   1663A  PHE*     3.0    24.0    +      -       -      +
   1664A  ALA*     3.0    13.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1661 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1358A  VAL*     3.9    29.4    -      -       +      -
   1361A  ALA*     5.2     0.9    -      -       +      -
   1362A  LEU*     5.0     2.7    -      -       +      -
   1657A  VAL*     3.0    32.4    +      -       +      +
   1658A  SER*     4.6     1.1    -      -       -      +
   1660A  CYS*     1.3    75.5    -      -       +      +
   1662A  ILE*     1.3    60.7    +      -       -      +
   1664A  ALA*     3.1     4.7    +      -       -      +
   1665A  MET*     2.9    30.5    +      -       +      -
   1717A  VAL*     4.8     8.5    -      -       +      -
   1721A  PHE*     4.8    15.5    -      -       +      -
   1727A  LYS*     6.2     1.1    -      -       -      +
   1742A  LEU*     5.2     1.8    -      -       +      -
   1817A  ARG*     2.8    36.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE1662 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1658A  SER*     2.9    20.9    +      -       -      +
   1659A  ILE*     3.3    36.3    -      -       +      +
   1661A  VAL*     1.3    79.4    -      -       -      +
   1663A  PHE*     1.3    48.0    +      -       -      +
   1666A  SER*     2.5    37.4    +      -       -      -
   1745A  TYR*     3.3    26.7    -      -       +      +
   1774A  ASN      5.7     2.9    -      -       -      +
   1775A  LEU*     5.3     4.5    -      -       +      -
   1778A  GLY*     4.3    16.2    -      -       -      -
   1814A  CYS*     3.7    21.8    -      -       -      +
   1817A  ARG*     3.3    21.6    -      -       +      +
   1818A  GLY*     4.3    15.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE1663 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1353A  LEU*     4.4     8.7    -      -       +      -
   1357A  PHE*     3.5    39.5    -      +       +      -
   1659A  ILE      3.0    15.6    +      -       -      +
   1660A  CYS*     3.0    16.8    +      -       -      +
   1662A  ILE*     1.3    78.0    -      -       -      +
   1664A  ALA*     1.3    61.8    +      -       -      +
   1666A  SER*     3.3     5.9    -      -       -      -
   1667A  PHE*     2.9    37.8    +      +       +      +
   1771A  THR*     3.6    28.7    -      -       +      +
   1775A  LEU*     3.5    38.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1664 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1353A  LEU*     6.1     0.7    -      -       -      -
   1354A  PRO*     3.6    42.5    -      -       +      +
   1357A  PHE*     5.1     3.8    -      -       +      -
   1358A  VAL*     4.1    15.3    -      -       +      +
   1660A  CYS      3.0    12.2    +      -       -      +
   1661A  VAL      3.1     5.3    +      -       -      +
   1663A  PHE*     1.3    79.3    -      -       -      +
   1665A  MET*     1.3    62.5    +      -       +      +
   1667A  PHE*     2.6    27.2    +      -       -      +
   1668A  VAL      3.0    10.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with MET1665 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1354A  PRO*     3.7    30.1    -      -       +      -
   1661A  VAL*     2.9    12.3    +      -       +      +
   1664A  ALA*     1.3    73.8    -      -       +      +
   1666A  SER*     1.3    61.5    +      -       -      +
   1667A  PHE      3.2     0.2    -      -       -      -
   1668A  VAL*     3.3    18.7    -      -       +      +
   1669A  PRO*     3.8     0.2    -      -       -      +
   1710A  TYR*     3.5    33.7    -      -       -      +
   1713A  PRO*     4.6     9.4    -      -       +      +
   1714A  ALA*     4.3    12.3    -      -       -      +
   1717A  VAL*     4.0    22.9    -      -       +      -
   1742A  LEU*     4.2    12.8    -      -       +      -
   1745A  TYR*     3.6    15.4    -      -       +      -
   1749A  ILE*     3.3    21.3    -      -       -      +
   1817A  ARG*     3.5    22.9    -      -       -      +
----------------------------------------------------------
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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