Contacts of the helix formed by residues 742 - 765 (chain A) in PDB entry 3NC0


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 GLN 742 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    739A  VAL*     3.0    42.3    -      -       -      +
    740A  THR      3.2     1.8    +      -       -      -
    741A  LYS*     1.3    77.9    -      -       -      +
    743A  PRO*     1.3    80.6    -      -       +      +
    744A  LEU*     3.4     3.9    +      -       +      +
    745A  ILE*     3.4    11.2    +      -       +      +
    746A  ARG*     3.2    26.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 743 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    742A  GLN*     1.3    91.1    -      -       +      +
    744A  LEU*     1.3    65.7    +      -       -      +
    746A  ARG*     3.2     5.7    +      -       +      +
    747A  SER*     2.9    23.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 744 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    680A  LYS*     3.6    36.6    -      -       +      +
    682A  PRO*     3.9    30.7    -      -       +      -
    685A  VAL*     4.6     5.8    -      -       +      -
    727A  ASN*     5.6     1.6    -      -       -      +
    742A  GLN*     3.4     5.1    +      -       +      +
    743A  PRO*     1.3    79.9    -      -       +      +
    745A  ILE*     1.3    63.0    +      -       +      +
    747A  SER*     3.1    11.9    +      -       -      -
    748A  MET*     2.9    50.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 745 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    727A  ASN*     4.9     3.4    -      -       -      +
    728A  ILE*     4.2    27.4    -      -       +      -
    731A  ALA*     4.2    16.4    -      -       +      -
    739A  VAL*     3.3    38.8    -      -       +      +
    740A  THR*     3.6    24.0    -      -       +      +
    742A  GLN*     3.4    10.2    +      -       +      +
    743A  PRO      3.3     0.6    -      -       -      -
    744A  LEU*     1.3    80.3    -      -       +      +
    746A  ARG*     1.3    59.8    +      -       -      +
    748A  MET*     2.9    14.8    +      -       -      +
    749A  ARG*     2.8    44.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 746 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436A  ASP      5.3     3.1    -      -       -      +
    437A  GLN*     2.8    67.7    +      -       -      +
    438A  GLY*     4.3     5.3    -      -       -      +
    740A  THR      3.1    23.5    +      -       -      +
    741A  LYS*     3.2    38.3    -      -       -      +
    742A  GLN      3.2    23.0    +      -       -      +
    743A  PRO*     3.2     7.9    +      -       +      +
    745A  ILE*     1.3    79.0    -      -       -      +
    747A  SER*     1.3    59.5    +      -       -      +
    749A  ARG*     3.5     7.0    -      -       -      +
    750A  THR*     3.0    17.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 747 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682A  PRO*     4.6     2.8    +      -       -      -
    685A  VAL*     3.2    32.7    +      -       -      +
    686A  LYS*     4.1     6.8    +      -       -      +
    743A  PRO      2.9    14.7    +      -       -      -
    744A  LEU*     3.2    16.4    -      -       -      -
    745A  ILE      3.0     0.2    -      -       -      -
    746A  ARG*     1.3    76.6    -      -       -      +
    748A  MET*     1.3    57.8    +      -       -      +
    750A  THR*     3.0    26.4    +      -       -      -
    751A  VAL*     3.4     6.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 748 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679A  LEU      3.6    22.4    -      -       -      +
    680A  LYS*     3.7    17.3    -      -       +      -
    685A  VAL*     4.2    16.2    -      -       +      -
    724A  LEU*     3.9    20.4    -      -       +      +
    727A  ASN*     3.5    34.5    -      -       -      +
    728A  ILE*     3.7    24.5    -      -       +      -
    744A  LEU*     2.9    39.3    +      -       +      +
    745A  ILE*     3.5    11.4    -      -       -      +
    747A  SER*     1.3    70.1    -      -       -      +
    749A  ARG*     1.3    66.5    +      -       -      +
    750A  THR      3.1     1.7    +      -       -      -
    751A  VAL*     3.4     4.2    +      -       -      +
    752A  LYS*     3.3    24.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 749 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    437A  GLN*     3.6    11.7    -      -       -      +
    728A  ILE*     3.8    30.7    -      -       -      +
    732A  ILE*     4.3     0.4    -      -       -      +
    740A  THR*     4.1    20.1    -      -       -      +
    745A  ILE*     2.8    31.2    +      -       -      +
    746A  ARG*     3.5    14.4    -      -       -      +
    747A  SER      3.3     0.2    -      -       -      -
    748A  MET*     1.3    75.5    -      -       -      +
    750A  THR*     1.3    58.3    +      -       -      +
    752A  LYS*     3.2    16.4    +      -       +      +
    753A  ARG*     2.9    49.0    +      -       -      +
    794A  ALA      3.5    22.6    +      -       -      -
    795A  ALA*     3.4    23.2    +      -       -      +
    796A  ARG      5.1     3.8    +      -       -      -
    797A  GLU*     4.3    14.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 750 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    437A  GLN*     3.5    17.1    +      -       +      +
    439A  GLU*     3.4    28.0    +      -       -      +
    689A  GLY*     4.7    12.8    -      -       -      -
    693A  LYS*     4.5     7.2    -      -       -      +
    746A  ARG      3.0    13.7    +      -       -      -
    747A  SER*     3.0    13.6    +      -       -      -
    749A  ARG*     1.3    77.3    -      -       -      +
    751A  VAL*     1.3    60.9    +      -       -      +
    753A  ARG*     3.9     4.8    -      -       -      +
    754A  GLU*     3.0    44.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 751 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    685A  VAL*     3.8    31.6    -      -       +      +
    688A  LEU*     3.9    10.5    -      -       +      -
    689A  GLY*     3.8    16.6    -      -       -      +
    692A  LEU*     3.4    19.4    -      -       +      +
    717A  MET*     6.4     0.2    -      -       +      -
    720A  VAL*     4.2    16.4    -      -       +      -
    721A  TYR*     5.2     2.9    -      -       -      -
    724A  LEU*     3.3    33.0    -      -       +      -
    747A  SER      3.4     2.6    +      -       -      +
    748A  MET      3.4     1.6    +      -       -      +
    750A  THR*     1.3    77.1    -      -       -      +
    752A  LYS*     1.3    55.0    +      -       -      +
    755A  THR*     2.6    41.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 752 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    721A  TYR*     3.7    45.9    +      -       +      +
    724A  LEU*     4.5     5.6    -      -       +      -
    725A  SER*     3.2    35.1    +      -       -      +
    728A  ILE*     3.9    24.2    -      -       +      +
    748A  MET      3.3    10.8    -      -       -      +
    749A  ARG*     3.3    16.3    -      -       -      +
    750A  THR      3.1     0.2    -      -       -      -
    751A  VAL*     1.3    78.6    -      -       -      +
    753A  ARG*     1.3    57.3    +      -       -      +
    755A  THR*     3.2     4.3    +      -       -      -
    756A  LEU*     3.0    34.3    +      -       +      +
    791A  ASN*     4.1     3.6    -      -       -      +
    795A  ALA      4.0    18.6    +      -       -      -
    797A  GLU*     4.1    23.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 753 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    436A  ASP*     3.3    37.0    +      -       -      -
    437A  GLN*     2.6    37.8    +      -       -      +
    749A  ARG*     2.9    33.2    +      -       -      +
    750A  THR*     4.0     5.4    -      -       -      +
    752A  LYS*     1.3    76.3    -      -       -      +
    754A  GLU*     1.3    61.4    +      -       +      +
    756A  LEU*     3.2    10.9    +      -       -      +
    757A  LYS*     2.9    31.1    +      -       +      +
    797A  GLU*     3.8    32.1    +      -       -      +
    799A  GLU*     4.6    11.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 754 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689A  GLY      4.7     1.8    -      -       -      +
    692A  LEU*     4.0    21.7    -      -       +      +
    693A  LYS*     2.7    52.1    +      -       +      +
    696A  VAL*     3.6    22.2    -      -       +      +
    750A  THR*     3.0    27.8    +      -       +      +
    751A  VAL*     4.4     0.9    -      -       -      +
    753A  ARG*     1.3    76.0    -      -       +      +
    755A  THR*     1.3    60.1    +      -       -      +
    757A  LYS*     3.4    29.9    +      -       -      +
    758A  LEU*     2.8    31.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with THR 755 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    692A  LEU*     3.2    17.7    -      -       -      +
    717A  MET*     3.9    26.8    +      -       +      +
    718A  LEU*     4.7     2.2    -      -       +      -
    721A  TYR*     3.7    31.4    -      -       +      +
    751A  VAL*     2.6    29.2    +      -       -      +
    752A  LYS      3.3     5.8    -      -       -      -
    754A  GLU*     1.3    77.6    -      -       -      +
    756A  LEU*     1.3    56.1    +      -       -      +
    758A  LEU*     3.5     3.9    +      -       -      +
    759A  ILE*     3.0    44.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 756 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    721A  TYR*     4.2    10.8    -      -       +      +
    752A  LYS      3.0    19.3    +      -       -      +
    753A  ARG*     3.5     8.5    -      -       -      +
    754A  GLU      3.1     0.2    -      -       -      -
    755A  THR*     1.3    75.4    -      -       +      +
    757A  LYS*     1.3    65.4    +      -       -      +
    759A  ILE*     3.8     8.7    -      -       +      +
    760A  SER*     2.9    25.8    +      -       -      -
    780A  LEU*     6.3     0.2    -      -       +      -
    784A  VAL*     4.0    29.8    -      -       +      -
    797A  GLU*     3.7    29.6    -      -       +      -
    799A  GLU*     3.9    11.0    -      -       +      -
    800A  VAL*     3.9    19.7    -      -       +      +
    803A  THR*     3.4    31.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 757 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    693A  LYS*     5.3     2.2    -      -       -      +
    696A  VAL*     4.3    18.5    -      -       +      +
    753A  ARG*     2.9    16.2    +      -       +      +
    754A  GLU*     3.4    39.0    +      -       -      +
    756A  LEU*     1.3    75.5    -      -       -      +
    758A  LEU*     1.3    52.8    +      -       -      +
    760A  SER*     3.4     5.3    +      -       -      -
    761A  GLY*     2.6    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 758 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    692A  LEU*     4.5     6.3    -      -       +      -
    695A  ASN*     3.6    47.1    -      -       +      +
    696A  VAL*     4.0    11.4    -      -       +      +
    699A  CYS*     4.0    17.5    -      -       +      -
    706A  PHE*     4.1     9.4    -      -       +      -
    710A  LEU*     4.1    20.3    -      -       +      +
    713A  ILE*     4.8     4.5    -      -       +      -
    717A  MET*     3.9    24.0    -      -       +      -
    754A  GLU      2.8    17.0    +      -       -      +
    755A  THR*     3.6     6.1    -      -       -      +
    757A  LYS*     1.3    77.6    -      -       -      +
    759A  ILE*     1.3    62.9    +      -       -      +
    761A  GLY*     4.9     0.7    -      -       -      -
    762A  TRP*     3.1    22.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 759 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    710A  LEU*     5.4     3.1    -      -       -      -
    714A  TYR*     3.7    30.3    -      -       +      +
    717A  MET*     4.1     6.7    -      -       +      -
    718A  LEU*     3.8    20.4    -      -       +      -
    755A  THR*     3.0    30.2    +      -       +      +
    756A  LEU*     3.3    11.2    +      -       +      +
    758A  LEU*     1.3    77.4    -      -       -      +
    760A  SER*     1.3    62.9    +      -       -      +
    762A  TRP*     4.1     2.9    -      -       -      +
    763A  VAL*     3.3    34.8    +      -       +      +
    780A  LEU*     3.5    38.4    -      -       +      -
    784A  VAL*     4.7     5.8    -      -       +      -
    803A  THR*     4.7     8.7    -      -       +      -
    807A  ILE*     5.5     2.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 760 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    756A  LEU      2.9    18.6    +      -       -      -
    757A  LYS*     3.4     6.6    +      -       -      -
    759A  ILE*     1.3    76.2    -      -       -      +
    761A  GLY*     1.3    67.9    +      -       -      +
    762A  TRP      3.2     0.7    +      -       -      -
    763A  VAL*     3.5     4.6    +      -       -      -
    764A  SER*     3.0    28.9    +      -       -      -
    803A  THR*     3.9    33.8    +      -       -      -
    806A  ILE*     4.1    23.5    -      -       -      +
    807A  ILE*     5.0     2.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 761 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    696A  VAL*     6.4     0.4    -      -       -      -
    699A  CYS*     4.3     4.4    -      -       -      -
    757A  LYS      2.6    25.9    +      -       -      -
    758A  LEU*     3.9     1.6    -      -       -      -
    760A  SER*     1.3    75.9    +      -       -      +
    762A  TRP*     1.3    59.1    +      -       -      +
    764A  SER*     3.9     8.8    -      -       -      -
    765A  ARG*     2.6    36.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TRP 762 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    699A  CYS*     3.7    24.2    -      -       -      -
    703A  GLY      4.3     8.5    -      -       -      -
    704A  HIS*     3.3    36.2    +      +       -      +
    706A  PHE*     4.6     3.8    -      +       +      -
    707A  VAL*     3.8    32.4    -      -       +      +
    710A  LEU*     3.8    22.4    -      -       +      -
    758A  LEU*     3.1    17.5    +      -       +      +
    759A  ILE      4.1     1.1    -      -       -      +
    761A  GLY*     1.3    76.3    -      -       -      +
    763A  VAL*     1.3   102.0    +      -       +      +
    764A  SER      2.9     1.8    -      -       -      -
    765A  ARG*     2.8    17.5    +      -       +      -
    766A  SER*     2.9    21.1    +      -       -      -
    771A  MET*     4.5     2.0    -      -       +      -
    772A  VAL*     3.6    33.2    -      -       +      -
    776A  PHE*     4.0    28.7    -      +       +      -
----------------------------------------------------------
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Residues in contact with VAL 763 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    714A  TYR*     6.0     0.2    -      -       -      +
    759A  ILE*     3.3    24.3    +      -       +      +
    760A  SER      4.2     3.1    -      -       -      +
    762A  TRP*     1.3    99.8    -      -       +      +
    764A  SER*     1.3    59.5    +      -       -      +
    766A  SER*     2.7    22.1    +      -       -      +
    772A  VAL*     4.1    20.9    -      -       +      -
    776A  PHE*     5.6     4.5    -      -       +      +
    777A  VAL*     6.1     2.2    -      -       +      -
    780A  LEU*     6.2     1.6    -      -       +      -
    806A  ILE*     5.8     0.9    -      -       +      -
    807A  ILE*     4.3    29.2    -      -       +      -
    810A  LYS*     3.1    30.0    -      -       +      -
    811A  LEU*     4.3     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 764 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    760A  SER      3.0    21.3    +      -       -      -
    761A  GLY*     3.9     8.9    -      -       -      -
    762A  TRP      2.9     0.4    -      -       -      -
    763A  VAL*     1.3    77.2    -      -       -      +
    765A  ARG*     1.3    65.6    +      -       -      +
    806A  ILE*     3.2    22.8    -      -       -      +
    810A  LYS*     3.0    29.7    +      -       -      +
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Residues in contact with ARG 765 (chain A). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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    696A  VAL      5.6     0.4    +      -       -      -
    699A  CYS*     4.3    10.1    +      -       -      -
    700A  LYS*     3.6    57.4    +      -       -      +
    703A  GLY*     4.6    14.8    -      -       -      -
    704A  HIS*     3.6    20.7    +      -       -      +
    761A  GLY*     2.6    38.2    +      -       -      +
    762A  TRP*     2.8    12.8    +      -       +      +
    764A  SER*     1.3    78.6    -      -       -      +
    766A  SER*     1.3    62.8    +      -       -      +
    767A  ASN*     4.9     1.2    -      -       -      +
    810A  LYS*     4.8     0.4    -      -       -      +
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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
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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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