Contacts of the helix formed by residues 1657 - 1683 (chain A) in PDB entry 2KBB


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 GLY1657 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1656A  PRO*     1.3    75.0    -      -       -      +
   1658A  GLN*     1.3    55.6    +      -       -      +
   1659A  LEU*     3.1     7.0    -      -       -      +
   1660A  GLU*     3.1    19.8    +      -       -      +
   1661A  CYS*     2.8    42.9    +      -       -      -
   1724A  ALA      4.1     3.8    +      -       -      -
   1727A  LEU*     3.9    16.4    -      -       -      -
   1728A  GLY*     4.3     5.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLN1658 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1650A  ILE      4.0     6.1    -      -       -      +
   1651A  ASP*     3.2    35.0    -      -       +      +
   1652A  PRO*     4.5     0.7    -      -       +      -
   1653A  PHE*     3.5    20.9    -      -       +      +
   1655A  ALA*     2.8    28.6    -      -       -      +
   1656A  PRO      3.4     2.1    -      -       -      +
   1657A  GLY*     1.3    74.2    -      -       -      +
   1659A  LEU*     1.3    62.4    +      -       -      +
   1662A  GLU*     3.4    18.5    +      -       -      +
   1780A  LYS*     2.9    43.5    +      -       +      +
   1781A  GLU      3.7     6.3    +      -       -      -
   1783A  GLY*     2.8    38.4    +      -       -      +
   1785A  ASN*     5.2     0.8    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
   1649A  GLY*     3.2    39.9    -      -       -      +
   1650A  ILE      4.5     2.6    +      -       -      -
   1651A  ASP*     4.9     5.6    -      -       +      +
   1655A  ALA      4.9     0.6    +      -       -      -
   1656A  PRO*     6.1     0.4    -      -       +      -
   1657A  GLY      3.1     3.7    -      -       -      +
   1658A  GLN*     1.3    79.7    -      -       -      +
   1660A  GLU*     1.3    81.3    -      -       +      +
   1662A  GLU*     3.1     3.6    +      -       -      +
   1663A  THR*     2.9    39.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU1660 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1657A  GLY*     3.1    15.6    +      -       -      +
   1659A  LEU*     1.3   100.4    -      -       +      +
   1661A  CYS*     1.3    57.3    +      -       -      +
   1663A  THR*     2.8    18.9    +      -       -      -
   1664A  ALA*     3.0    20.8    +      -       -      +
   1728A  GLY*     3.6    34.3    -      -       -      +
   1731A  VAL*     3.4     8.7    -      -       +      +
   1732A  SER*     4.1    12.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with CYS1661 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1657A  GLY      2.8    28.7    +      -       -      +
   1660A  GLU*     1.3    73.6    -      -       -      +
   1662A  GLU*     1.3    57.3    +      -       -      +
   1664A  ALA*     3.3     1.9    +      -       -      +
   1665A  ILE*     2.8    35.3    +      -       -      +
   1727A  LEU*     3.8    11.2    -      -       -      -
   1731A  VAL*     3.7    28.9    -      -       -      -
   1776A  LEU*     3.6    10.7    -      -       -      +
   1779A  ALA*     3.8    28.5    -      -       -      -
   1780A  LYS*     3.6    22.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU1662 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1649A  GLY*     2.6    30.8    +      -       -      +
   1650A  ILE*     2.8    31.4    +      -       -      +
   1658A  GLN      3.4     9.3    +      -       -      +
   1659A  LEU      3.1     4.0    +      -       -      +
   1661A  CYS*     1.3    76.9    -      -       -      +
   1663A  THR*     1.3    64.4    +      -       -      +
   1665A  ILE*     3.3    12.1    +      -       +      +
   1666A  ALA*     3.2    21.0    +      -       -      +
   1780A  LYS*     2.7    44.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR1663 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1649A  GLY*     3.8    11.9    -      -       -      +
   1659A  LEU*     2.9    35.4    +      -       +      +
   1660A  GLU*     2.8    26.7    +      -       -      -
   1662A  GLU*     1.3    78.3    -      -       -      +
   1664A  ALA*     1.3    59.5    +      -       -      +
   1666A  ALA*     3.5    15.2    +      -       -      +
   1667A  ALA*     3.5    10.4    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
   1660A  GLU      3.0    18.6    +      -       -      +
   1661A  CYS      3.7     0.7    -      -       -      +
   1663A  THR*     1.3    73.6    +      -       -      +
   1665A  ILE*     1.3    56.8    +      -       -      +
   1666A  ALA      3.2     0.4    -      -       -      -
   1667A  ALA*     3.0     8.7    +      -       -      +
   1668A  LEU*     2.7    36.4    +      -       -      +
   1731A  VAL*     3.4    22.2    -      -       +      -
   1735A  ALA*     3.9    16.3    -      -       +      +
   1776A  LEU*     3.7    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE1665 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1661A  CYS      2.8    25.7    +      -       -      +
   1662A  GLU*     3.4    17.7    -      -       +      +
   1664A  ALA*     1.3    75.8    -      -       -      +
   1666A  ALA*     1.3    54.6    +      -       -      +
   1669A  ASN*     2.8    42.4    +      -       -      +
   1773A  LEU*     3.8    15.0    -      -       +      +
   1776A  LEU*     3.6    21.1    -      -       +      +
   1777A  TYR*     3.7    62.4    -      -       +      +
   1780A  LYS*     4.3    11.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA1666 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1662A  GLU      3.2    11.6    +      -       -      +
   1663A  THR*     3.5    12.6    -      -       -      +
   1664A  ALA      3.2     0.6    -      -       -      -
   1665A  ILE*     1.3    79.6    -      -       -      +
   1667A  ALA*     1.3    60.3    +      -       -      +
   1669A  ASN*     3.8     5.4    -      -       -      +
   1670A  SER*     3.3    20.3    +      -       -      -
   1673A  ARG*     5.8     0.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1667 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1663A  THR      3.5     7.9    +      -       -      +
   1664A  ALA*     3.0    11.5    +      -       -      +
   1666A  ALA*     1.3    78.4    -      -       -      +
   1668A  LEU*     1.3    64.8    +      -       -      +
   1670A  SER*     3.1    17.9    +      -       -      -
   1671A  CYS*     3.2    12.1    +      -       -      +
   1735A  ALA*     5.4     7.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU1668 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1664A  ALA      2.7    18.7    +      -       -      +
   1667A  ALA*     1.3    71.2    -      -       -      +
   1669A  ASN*     1.3    65.0    +      -       -      +
   1671A  CYS*     2.9    45.5    -      -       -      -
   1672A  LEU*     3.0    11.8    +      -       +      +
   1734A  MET*     6.2     0.2    -      -       +      -
   1735A  ALA*     5.6     6.7    -      -       +      +
   1738A  PHE*     4.0    27.8    -      -       +      -
   1769A  ALA*     3.9    10.8    -      -       +      +
   1772A  ALA*     3.4    13.2    -      -       +      -
   1773A  LEU*     3.2    46.0    -      -       +      +
   1776A  LEU*     3.4    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN1669 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1665A  ILE*     2.8    23.9    +      -       -      +
   1666A  ALA*     3.8     7.4    -      -       -      +
   1668A  LEU*     1.3    76.4    -      -       -      +
   1670A  SER*     1.3    61.1    +      -       -      +
   1672A  LEU*     3.2    11.1    +      -       -      +
   1673A  ARG*     3.2    53.0    +      -       -      +
   1773A  LEU*     4.0    16.4    -      -       +      +
   1777A  TYR*     4.3    16.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER1670 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1666A  ALA      3.3    10.4    +      -       -      -
   1667A  ALA*     3.1    15.1    +      -       -      -
   1669A  ASN*     1.3    80.4    -      -       -      +
   1671A  CYS*     1.3    54.6    +      -       -      +
   1673A  ARG*     3.3    17.7    +      -       -      +
   1674A  ASP*     3.1    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS1671 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1667A  ALA      3.2     8.0    +      -       -      +
   1668A  LEU*     2.9    50.0    +      -       -      -
   1670A  SER*     1.3    73.7    -      -       -      +
   1672A  LEU*     1.3    65.6    +      -       -      +
   1674A  ASP*     3.5     7.4    -      -       -      +
   1675A  LEU*     2.8    34.5    +      -       -      +
   1738A  PHE*     4.7     8.1    -      -       -      +
   1739A  GLU*     5.4     3.8    -      -       -      -
   1742A  THR*     3.1    28.7    -      -       +      +
   1769A  ALA*     4.2     7.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1672 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1668A  LEU*     3.0    32.1    +      -       +      +
   1669A  ASN*     3.3    14.1    -      -       -      +
   1671A  CYS*     1.3    78.4    -      -       -      +
   1673A  ARG*     1.3    57.5    -      -       +      +
   1675A  LEU*     3.4     2.9    +      -       -      +
   1676A  ASP*     2.8    32.2    +      -       -      +
   1766A  LYS*     3.5    30.1    -      -       +      +
   1769A  ALA*     3.5    33.9    -      -       +      +
   1770A  GLU*     3.3    32.8    -      -       +      +
   1773A  LEU*     4.4    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG1673 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1666A  ALA      5.8     0.4    +      -       -      -
   1669A  ASN*     3.2    41.3    +      -       -      +
   1670A  SER*     3.6    17.0    -      -       -      +
   1671A  CYS      3.3     0.2    -      -       -      -
   1672A  LEU*     1.3    76.6    -      -       +      +
   1674A  ASP*     1.3    57.0    +      -       -      +
   1676A  ASP*     3.4     6.8    +      -       -      +
   1677A  GLN*     2.9    38.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP1674 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1670A  SER      3.1    14.1    +      -       -      +
   1671A  CYS*     3.5     9.6    -      -       -      +
   1672A  LEU      3.3     0.2    -      -       -      -
   1673A  ARG*     1.3    78.6    -      -       -      +
   1675A  LEU*     1.3    56.1    +      -       -      +
   1677A  GLN*     3.4     4.7    +      -       -      +
   1678A  ALA*     2.9    25.3    +      -       -      +
   1742A  THR*     3.8    13.1    -      -       +      +
   1743A  LEU*     5.6     7.0    -      -       -      +
   1746A  VAL*     3.3    24.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU1675 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1671A  CYS      2.8    18.6    +      -       -      +
   1672A  LEU*     3.7     3.4    -      -       -      +
   1674A  ASP*     1.3    73.8    -      -       -      +
   1676A  ASP*     1.3    66.0    -      -       -      +
   1678A  ALA*     3.1    13.2    +      -       -      +
   1679A  SER*     3.1    15.2    +      -       -      -
   1742A  THR*     3.6    43.7    -      -       +      +
   1745A  ALA*     3.7    20.0    -      -       +      -
   1746A  VAL*     3.8     6.7    -      -       +      -
   1762A  LEU*     4.0    16.0    -      -       +      +
   1765A  THR*     3.8    10.5    -      -       +      +
   1766A  LYS*     3.5    41.9    -      -       +      +
   1769A  ALA*     4.2     9.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP1676 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1672A  LEU      2.8    19.1    +      -       -      +
   1673A  ARG*     3.7     6.6    -      -       -      +
   1674A  ASP      3.3     0.2    -      -       -      -
   1675A  LEU*     1.3    76.1    -      -       -      +
   1677A  GLN*     1.3    73.5    +      -       -      +
   1679A  SER*     3.6     5.4    +      -       -      -
   1680A  LEU*     3.4    19.9    +      -       -      +
   1766A  LYS*     3.8    27.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN1677 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1673A  ARG*     2.9    23.8    +      -       +      +
   1674A  ASP*     3.8     5.6    -      -       -      +
   1676A  ASP*     1.3    87.8    +      -       -      +
   1678A  ALA*     1.3    56.1    +      -       -      +
   1680A  LEU*     3.2    27.2    +      -       -      +
   1681A  ALA*     2.7    37.5    +      -       -      +
   1687A  LEU*     5.4     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA1678 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1674A  ASP      2.9    15.6    +      -       -      +
   1675A  LEU      3.1    10.7    +      -       -      +
   1677A  GLN*     1.3    77.9    -      -       -      +
   1679A  SER*     1.3    53.6    +      -       -      +
   1682A  ALA*     2.7    38.7    +      -       -      +
   1687A  LEU*     4.3    11.9    -      -       +      +
   1746A  VAL*     3.5    36.6    -      -       +      -
   1749A  ALA*     4.9     0.7    -      -       +      -
   1762A  LEU*     3.8    12.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER1679 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1675A  LEU      3.1     7.9    +      -       -      -
   1676A  ASP*     3.9     9.9    -      -       -      -
   1677A  GLN      3.4     0.2    -      -       -      -
   1678A  ALA*     1.3    78.5    -      -       -      +
   1680A  LEU*     1.3    60.6    +      -       -      +
   1683A  VAL*     3.2    26.0    +      -       -      +
   1759A  MET*     3.7    16.6    -      -       -      +
   1762A  LEU*     3.4    22.3    -      -       -      +
   1763A  ASP*     5.8     5.4    -      -       -      +
   1766A  LYS*     6.0     2.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU1680 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1676A  ASP      3.4    11.4    +      -       -      +
   1677A  GLN*     3.2    33.8    +      -       -      +
   1678A  ALA      3.2     0.4    -      -       -      -
   1679A  SER*     1.3    77.4    -      -       -      +
   1681A  ALA*     1.3    62.3    +      -       -      +
   1683A  VAL*     3.0    26.4    -      -       +      +
   1684A  SER*     3.6    10.0    +      -       -      -
   1686A  GLN*     4.2     6.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA1681 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1677A  GLN*     2.7    20.9    +      -       +      +
   1678A  ALA      3.8     0.2    -      -       -      +
   1680A  LEU*     1.3    73.7    -      -       -      +
   1682A  ALA*     1.3    58.5    +      -       -      +
   1684A  SER      2.9     4.0    +      -       -      -
   1685A  GLN      2.9     9.2    +      -       -      -
   1686A  GLN*     2.7    52.0    +      -       +      +
   1687A  LEU*     3.5    26.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA1682 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1678A  ALA      2.7    22.5    +      -       -      +
   1681A  ALA*     1.3    72.8    -      -       -      +
   1683A  VAL*     1.3    60.3    +      -       -      +
   1684A  SER      3.1     1.0    +      -       -      -
   1685A  GLN*     3.5    12.1    +      -       -      +
   1687A  LEU*     3.8    14.1    -      -       +      +
   1749A  ALA*     3.9    33.9    -      -       +      +
   1750A  SER*     4.4     2.2    -      -       -      +
   1758A  GLN*     4.4     5.6    +      -       -      +
   1759A  MET*     3.9    17.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL1683 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
   1679A  SER      3.2    16.1    +      -       -      +
   1680A  LEU*     3.0    31.4    -      -       +      +
   1682A  ALA*     1.3    78.5    -      -       -      +
   1684A  SER*     1.3    59.9    +      -       -      +
   1685A  GLN*     3.6     2.0    -      -       -      +
   1759A  MET*     3.6    14.3    -      -       +      +
----------------------------------------------------------
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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