Contacts of the helix formed by residues 1644 - 1667 (chain A) in PDB entry 4W8F


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 ILE1644 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1588A  GLU*     3.1    19.5    -      -       +      +
   1589A  VAL      3.3    26.0    -      -       -      +
   1590A  LEU*     4.0    17.7    -      -       +      -
   1619A  VAL*     4.3     8.3    -      -       +      -
   1622A  GLN*     3.0    32.6    +      -       -      +
   1643A  TYR*     1.3    78.1    -      -       -      +
   1645A  PHE*     1.3    66.7    +      -       -      +
   1646A  GLN*     4.0    19.1    -      -       +      -
   1647A  ALA*     3.5    14.0    +      -       +      +
   1648A  ILE*     3.4    11.8    +      -       -      +
   1697A  LYS*     4.2     2.0    -      -       -      +
   1762A  TYR*     3.7    31.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE1645 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1588A  GLU*     2.4    18.5    +      -       -      +
   1644A  ILE*     1.3    70.7    -      -       -      +
   1646A  GLN*     1.3    67.0    +      -       -      +
   1648A  ILE*     3.0     6.8    -      -       -      +
   1649A  LEU*     3.0    51.4    +      -       +      +
   1697A  LYS*     3.7    20.2    -      -       +      +
   1700A  ALA*     3.4    29.8    -      -       +      -
   1701A  LEU*     3.5    36.3    -      -       +      -
   1763A  ILE*     5.9     2.2    -      -       +      -
   1764A  GLY      3.3    17.7    -      -       -      +
   1765A  ILE*     3.4    23.6    -      -       +      -
   1766A  PRO*     4.3    10.3    -      -       +      -
   1768A  ARG*     3.8    18.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN1646 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1619A  VAL*     3.5    26.9    -      -       +      +
   1644A  ILE*     3.5    15.8    -      -       +      +
   1645A  PHE*     1.3    86.5    -      -       +      +
   1647A  ALA*     1.3    60.5    -      -       -      +
   1649A  LEU*     3.5     8.0    +      -       +      +
   1650A  LEU*     3.2    23.3    +      -       +      +
   1758A  TYR*     2.8    33.8    +      -       +      +
   1760A  PHE      4.0     1.2    +      -       -      -
   1761A  GLU      3.2    17.4    +      -       -      -
   1762A  TYR*     3.4     5.2    -      -       +      -
   1763A  ILE*     2.6    46.5    +      -       +      +
   1764A  GLY      4.1     7.2    +      -       -      +
   1814A  GLY*     4.3     0.4    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
   1619A  VAL*     4.3     4.7    -      -       +      +
   1622A  GLN*     3.4    24.7    -      -       +      +
   1623A  PHE*     3.4    37.1    -      -       -      +
   1626A  CYS*     4.6     0.7    -      -       -      -
   1643A  TYR*     4.6     4.3    -      -       +      -
   1644A  ILE*     3.5    14.2    +      -       +      +
   1645A  PHE      3.1     0.8    +      -       -      -
   1646A  GLN*     1.3    80.8    -      -       -      +
   1648A  ILE*     1.3    52.3    -      -       -      +
   1650A  LEU*     5.1     0.2    -      -       -      -
   1651A  SER*     2.2    38.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE1648 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1626A  CYS*     3.6    12.5    -      -       -      -
   1630A  LEU*     4.8     0.7    -      -       +      +
   1636A  ILE*     3.6    26.2    -      -       +      -
   1639A  VAL*     3.8    11.7    -      -       +      -
   1640A  VAL*     3.4    46.0    -      -       +      +
   1643A  TYR*     4.8     4.5    -      -       +      +
   1644A  ILE      3.4    12.3    +      -       -      +
   1645A  PHE*     3.0    23.6    -      -       -      +
   1647A  ALA*     1.3    78.6    -      -       -      +
   1649A  LEU*     1.3    57.4    +      -       -      +
   1651A  SER*     3.4     7.4    -      -       -      -
   1652A  ALA*     3.1    25.5    +      -       -      +
   1697A  LYS*     4.7     3.8    -      -       +      -
   1701A  LEU*     3.7    21.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1649 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1645A  PHE*     3.0    51.9    +      -       +      +
   1646A  GLN*     3.6     9.2    -      -       +      +
   1648A  ILE*     1.3    74.6    -      -       -      +
   1650A  LEU*     1.3    62.7    +      -       +      +
   1651A  SER      3.0     1.6    -      -       -      -
   1652A  ALA*     3.0     7.1    +      -       +      +
   1653A  GLN*     2.9    38.2    +      -       +      +
   1701A  LEU*     4.1     8.3    -      -       +      -
   1704A  GLU*     3.4    41.1    -      -       +      +
   1758A  TYR*     6.1     0.9    -      -       -      +
   1763A  ILE*     6.0     4.9    -      -       +      -
   1768A  ARG*     3.9    16.6    -      -       -      +
   1811A  GLN      6.0     2.2    -      -       -      +
   1812A  ASN*     6.5     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1650 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1619A  VAL*     6.5     0.2    -      -       +      -
   1623A  PHE*     3.5    33.4    -      -       +      -
   1646A  GLN      3.2    13.0    +      -       -      +
   1647A  ALA*     5.1     0.2    -      -       -      -
   1649A  LEU*     1.3    79.0    -      -       +      +
   1651A  SER*     1.3    63.1    +      -       -      +
   1653A  GLN*     3.4    21.3    -      -       -      +
   1654A  VAL*     2.9    39.1    +      -       +      +
   1734A  PHE*     3.7    18.6    -      -       +      -
   1747A  VAL*     3.9    13.7    -      -       +      -
   1758A  TYR*     3.6    51.1    -      -       +      +
   1760A  PHE*     4.2     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1651 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1623A  PHE*     3.7    16.0    +      -       -      -
   1626A  CYS*     3.3    21.1    -      -       -      -
   1627A  LEU*     3.3    25.0    -      -       -      +
   1630A  LEU*     3.8    11.0    -      -       -      -
   1647A  ALA      2.2    31.2    +      -       -      -
   1648A  ILE      3.4     7.9    -      -       -      -
   1650A  LEU*     1.3    77.7    -      -       -      +
   1652A  ALA*     1.3    63.9    +      -       -      +
   1655A  MET*     2.9    22.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1652 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1630A  LEU*     4.4     6.0    -      -       -      +
   1636A  ILE*     5.1     2.9    -      -       +      -
   1648A  ILE      3.1    10.4    +      -       -      +
   1649A  LEU*     3.0    11.5    +      -       +      +
   1651A  SER*     1.3    78.7    -      -       -      +
   1653A  GLN*     1.3    57.8    +      -       -      +
   1655A  MET*     4.0     5.9    -      -       -      +
   1656A  TRP*     2.8    34.7    +      -       -      +
   1701A  LEU*     5.6     2.0    -      -       +      -
   1704A  GLU*     6.3     0.7    -      -       +      -
   1705A  TYR*     3.8    35.7    -      -       +      +
   1708A  PHE*     3.7    12.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN1653 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1649A  LEU*     2.9    28.8    +      -       +      +
   1650A  LEU*     3.4    21.2    -      -       -      +
   1651A  SER      3.1     0.2    -      -       -      -
   1652A  ALA*     1.3    76.7    -      -       -      +
   1654A  VAL*     1.3    62.4    +      -       -      +
   1656A  TRP*     3.6     3.3    -      -       -      +
   1657A  THR*     3.0    27.7    +      -       -      -
   1704A  GLU*     3.0    40.6    +      -       -      +
   1708A  PHE*     3.9    10.5    -      -       +      -
   1734A  PHE*     3.1    54.2    -      -       +      -
   1758A  TYR*     5.5     0.2    -      -       -      -
   1768A  ARG*     4.6     1.0    -      -       -      +
   1771A  TYR*     4.2     1.6    +      -       -      -
   1812A  ASN*     4.5    10.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1654 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1623A  PHE*     4.2    10.1    -      -       +      -
   1627A  LEU*     4.4    14.6    -      -       +      -
   1631A  LYS*     6.1     2.5    -      -       -      +
   1650A  LEU*     2.9    35.2    +      -       +      +
   1651A  SER      4.0     1.8    -      -       -      +
   1653A  GLN*     1.3    75.3    -      -       -      +
   1655A  MET*     1.3    65.4    +      -       -      +
   1657A  THR*     3.4     4.7    +      -       -      +
   1658A  GLU*     3.1    21.3    +      -       +      +
   1734A  PHE*     3.2    33.0    -      -       +      +
   1735A  TYR*     4.5     2.5    -      -       -      +
   1736A  GLN*     4.0    27.1    -      -       +      +
   1747A  VAL*     4.7     6.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET1655 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1627A  LEU*     3.9    10.9    -      -       +      +
   1630A  LEU*     3.9    42.2    -      -       +      +
   1631A  LYS*     4.1    22.2    -      -       +      +
   1651A  SER      2.9    16.0    +      -       -      +
   1652A  ALA*     4.0     4.9    -      -       -      +
   1654A  VAL*     1.3    75.2    -      -       -      +
   1656A  TRP*     1.3    72.5    +      -       +      +
   1658A  GLU*     3.1    12.4    +      -       -      +
   1659A  LEU*     2.9    47.9    +      -       +      +
   1672A  TYR*     4.7     3.8    -      -       -      +
   1679A  LYS*     4.5    17.7    -      -       -      +
   1705A  TYR*     4.6     8.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TRP1656 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1652A  ALA      2.8    20.9    +      -       -      +
   1653A  GLN*     3.6     6.1    -      -       -      +
   1655A  MET*     1.3    78.9    -      -       +      +
   1657A  THR*     1.3    73.4    +      -       -      +
   1659A  LEU*     2.7    23.6    +      -       -      +
   1660A  VAL*     2.8    25.4    +      -       +      +
   1672A  TYR*     3.6    31.6    -      +       -      +
   1707A  HIS*     4.1    21.3    -      +       -      -
   1708A  PHE*     3.5    57.1    -      +       +      +
   1711A  VAL*     4.0    21.8    -      -       +      -
   1712A  ILE*     3.9    12.9    -      -       +      +
   1728A  TRP*     3.7    28.3    -      +       -      -
   1731A  VAL*     4.4     4.3    -      -       +      -
   1732A  GLN      4.0    18.4    -      -       -      -
   1734A  PHE*     5.2     4.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with THR1657 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1653A  GLN      3.0    10.1    +      -       -      -
   1654A  VAL      3.4     0.9    -      -       -      +
   1656A  TRP*     1.3    87.9    -      -       -      +
   1658A  GLU*     1.3    65.1    +      -       -      +
   1660A  VAL*     3.5     9.6    -      -       -      +
   1661A  GLU*     3.0    29.9    +      -       +      +
   1728A  TRP*     4.3     2.2    -      -       +      -
   1733A  LYS*     3.4    12.8    -      -       +      +
   1734A  PHE      2.9    45.6    +      -       -      +
   1735A  TYR*     3.8    34.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1658 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1631A  LYS*     3.1    38.4    +      -       -      +
   1654A  VAL*     3.1     9.4    +      -       +      +
   1655A  MET*     3.1    11.6    +      -       -      +
   1657A  THR*     1.3    82.8    -      -       +      +
   1659A  LEU*     1.3    64.2    +      -       +      +
   1661A  GLU*     3.3    19.0    -      -       +      +
   1662A  LYS*     3.3    31.1    +      -       -      +
   1735A  TYR*     6.2     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1659 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1655A  MET*     2.9    36.5    +      -       +      +
   1656A  TRP      2.7    13.8    +      -       -      +
   1658A  GLU*     1.3    72.0    -      -       +      +
   1660A  VAL*     1.3    57.2    +      -       -      +
   1661A  GLU      3.0     4.9    +      -       -      -
   1662A  LYS*     3.1    28.1    +      -       +      +
   1663A  CYS*     2.8    30.8    +      -       -      +
   1672A  TYR*     3.2    41.3    -      -       +      +
   1675A  GLU*     5.8     1.8    -      -       -      +
   1679A  LYS*     6.0     0.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL1660 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1656A  TRP*     2.8    42.2    +      -       +      +
   1657A  THR*     3.5     3.8    -      -       -      +
   1659A  LEU*     1.3    73.8    -      -       -      +
   1661A  GLU*     1.3    55.6    +      -       -      +
   1663A  CYS*     3.6     9.2    -      -       +      -
   1664A  LEU*     3.0    27.5    +      -       +      +
   1669A  PHE*     4.8     6.1    -      -       +      -
   1672A  TYR*     4.0     7.5    -      -       +      -
   1712A  ILE*     4.5    12.1    -      -       +      -
   1715A  LEU*     3.5    32.1    -      -       +      -
   1728A  TRP*     3.0    37.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1661 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1657A  THR*     3.0    27.0    +      -       +      +
   1658A  GLU*     3.3    10.5    -      -       -      +
   1659A  LEU      3.0     0.6    -      -       -      -
   1660A  VAL*     1.3    76.6    -      -       -      +
   1662A  LYS*     1.3    63.8    +      -       -      +
   1664A  LEU*     3.3    23.6    +      -       -      +
   1665A  GLN*     3.6     5.7    +      -       -      +
   1728A  TRP*     4.1    20.8    +      -       +      +
   1735A  TYR*     2.6    38.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS1662 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1658A  GLU*     3.3    29.7    +      -       -      +
   1659A  LEU*     3.1    28.5    +      -       +      +
   1661A  GLU*     1.3    74.5    -      -       -      +
   1663A  CYS*     1.3    60.1    +      -       +      +
   1664A  LEU      3.0     5.4    -      -       -      -
   1665A  GLN*     3.1     7.9    +      -       -      +
   1666A  THR*     3.0    36.0    +      -       +      +
   1668A  GLN*     4.9    10.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with CYS1663 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1659A  LEU      2.8    18.5    +      -       -      +
   1660A  VAL*     3.6    13.5    -      -       +      +
   1662A  LYS*     1.3    81.4    -      -       +      +
   1664A  LEU*     1.3    52.7    +      -       -      +
   1666A  THR*     3.5     7.0    -      -       -      -
   1667A  ASN*     2.8    31.5    +      -       -      -
   1668A  GLN*     3.2    31.8    +      -       +      +
   1669A  PHE*     3.4    33.2    -      -       -      -
   1672A  TYR*     4.0    20.4    -      -       +      -
   1712A  ILE*     5.4     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1664 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1660A  VAL      3.0    20.9    +      -       -      +
   1661A  GLU*     3.3    15.3    -      -       -      +
   1662A  LYS      3.0     0.4    -      -       -      -
   1663A  CYS*     1.3    76.3    -      -       -      +
   1665A  GLN*     1.3    64.2    +      -       -      +
   1667A  ASN*     3.3    16.1    +      -       -      +
   1669A  PHE*     3.6    25.1    -      -       +      -
   1715A  LEU*     4.0    14.6    -      -       +      -
   1721A  LYS*     3.4    14.7    -      -       +      +
   1724A  ALA*     4.0    22.0    -      -       +      +
   1725A  ARG*     5.2     9.6    -      -       +      +
   1728A  TRP*     3.4    43.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLN1665 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1661A  GLU      3.6     7.0    +      -       -      +
   1662A  LYS*     3.1    10.6    +      -       -      +
   1664A  LEU*     1.3    78.6    -      -       -      +
   1666A  THR*     1.3    64.2    +      -       +      +
   1667A  ASN*     3.3     5.2    -      -       -      +
   1721A  LYS*     3.2    28.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR1666 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1662A  LYS*     3.0    19.2    +      -       +      +
   1663A  CYS*     3.5     3.1    -      -       -      -
   1665A  GLN*     1.3    79.1    -      -       +      +
   1667A  ASN*     1.3    77.0    +      -       -      +
   1668A  GLN*     3.4    32.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN1667 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1663A  CYS      2.8    16.2    +      -       -      -
   1664A  LEU      3.3    10.0    +      -       -      +
   1665A  GLN      3.3    11.8    -      -       -      +
   1666A  THR*     1.3    84.5    -      -       -      +
   1668A  GLN*     1.3    55.1    +      -       -      +
   1669A  PHE*     3.0    35.0    +      -       +      -
   1670A  SER      5.0     0.2    +      -       -      -
   1721A  LYS*     3.8    23.0    +      -       -      +
----------------------------------------------------------
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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