Contacts of the helix formed by residues 736 - 761 (chain A) in PDB entry 5CGD


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 THR 736 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    715A  GLU*     3.2    38.6    +      -       +      +
    734A  ASN      3.6    11.7    -      -       -      +
    735A  THR*     1.3    78.6    -      -       -      +
    737A  ASN*     1.3    66.5    +      -       -      +
    738A  LEU*     3.6     7.9    +      -       -      +
    739A  GLY      3.4     5.4    +      -       -      +
    740A  VAL*     3.4    16.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 737 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    736A  THR*     1.3    76.0    -      -       -      +
    738A  LEU*     1.3    53.0    +      -       -      +
    740A  VAL*     2.9     6.0    +      -       -      +
    741A  VAL*     2.7    42.3    +      -       +      +
    793A  PHE*     3.7    19.1    -      -       +      -
    798A  LYS*     4.3    11.1    +      -       -      -
   4001A  OLA      3.2    28.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 738 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    711A  LEU*     3.7    12.2    -      -       +      +
    714A  MET*     4.3    21.5    -      -       +      -
    715A  GLU*     3.9    21.8    -      -       -      +
    736A  THR*     3.4     2.7    +      -       -      +
    737A  ASN*     1.3    79.7    -      -       -      +
    739A  GLY*     1.3    61.6    +      -       -      +
    740A  VAL      3.2     0.5    +      -       -      -
    741A  VAL*     4.3     9.0    -      -       +      +
    742A  ALA*     3.3    39.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 739 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    648A  ARG*     4.7    13.5    +      -       -      +
    711A  LEU*     3.9    15.0    -      -       -      +
    715A  GLU*     3.9    10.2    +      -       -      -
    735A  THR*     4.1    14.0    -      -       -      +
    736A  THR*     3.4    12.5    +      -       -      -
    737A  ASN      3.1     1.4    -      -       -      -
    738A  LEU*     1.3    78.2    -      -       -      +
    740A  VAL*     1.3    61.0    +      -       -      +
    743A  PRO*     3.4    18.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 740 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    735A  THR*     3.7    17.0    -      -       +      +
    736A  THR      3.4    15.7    -      -       -      +
    737A  ASN*     2.9     7.2    +      -       -      +
    739A  GLY*     1.3    79.3    -      -       -      +
    741A  VAL*     1.3    64.7    +      -       -      +
    742A  ALA      3.4     0.4    -      -       -      -
    743A  PRO*     3.3     5.9    -      -       -      +
    744A  LEU*     3.1    25.9    +      -       +      +
    788A  PHE*     5.2     0.2    -      -       +      -
    792A  TYR*     4.3    27.8    -      -       +      +
    793A  PHE*     4.2    20.9    -      -       +      -
    802A  MET*     4.8     4.7    -      -       +      -
   4005A  51E      3.9    23.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 741 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    737A  ASN*     2.7    29.6    +      -       +      +
    738A  LEU*     4.4     9.6    -      -       +      +
    740A  VAL*     1.3    73.4    -      -       -      +
    742A  ALA*     1.3    54.9    +      -       -      +
    744A  LEU*     3.1     8.9    +      -       +      +
    745A  GLY*     2.7    32.8    +      -       -      -
    793A  PHE*     3.7    15.3    -      -       +      -
   4001A  OLA      3.7    50.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 742 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    707A  ILE*     4.0    16.7    -      -       +      +
    711A  LEU*     3.8    14.4    -      -       +      -
    738A  LEU*     3.3    25.7    +      -       +      +
    741A  VAL*     1.3    82.0    -      -       -      +
    743A  PRO*     1.3    69.2    -      -       +      +
    745A  GLY*     3.5     1.5    +      -       -      -
    746A  TYR*     3.3    21.1    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    648A  ARG      5.9     1.1    -      -       -      +
    652A  GLY*     4.4    15.7    -      -       -      -
    704A  GLN*     3.0    44.3    +      -       -      +
    707A  ILE*     4.5     2.0    -      -       +      -
    708A  ILE*     4.7    10.5    -      -       +      -
    711A  LEU*     4.1     7.9    -      -       +      -
    738A  LEU      4.1     0.2    -      -       -      +
    739A  GLY      3.4    25.4    -      -       -      +
    740A  VAL*     3.3    12.6    -      -       -      +
    742A  ALA*     1.3    94.0    -      -       +      +
    744A  LEU*     1.3    61.5    +      -       -      +
    747A  ASN*     3.0    16.0    +      -       -      -
   4005A  51E      6.3     0.2    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    740A  VAL*     3.1    21.4    +      -       +      +
    741A  VAL*     3.1     8.9    +      -       -      +
    743A  PRO*     1.3    76.6    -      -       -      +
    745A  GLY*     1.3    58.5    +      -       -      +
    747A  ASN*     3.4     6.7    +      -       -      +
    748A  GLY*     2.9    24.9    +      -       -      -
    785A  TRP*     3.5    33.8    -      -       +      +
    788A  PHE*     4.1    17.5    -      -       +      -
    789A  VAL*     4.2    16.6    -      -       +      -
    793A  PHE*     4.4    15.9    -      -       +      -
   4001A  OLA      3.7    29.5    -      -       +      +
   4005A  51E      3.7    24.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 745 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    741A  VAL*     2.7    18.9    +      -       -      -
    742A  ALA      4.1     1.6    -      -       -      -
    744A  LEU*     1.3    74.7    -      -       -      +
    746A  TYR*     1.3    55.9    +      -       -      +
    748A  GLY*     3.0     2.9    +      -       -      -
    749A  LEU*     3.0    31.9    +      -       -      +
   4001A  OLA      4.3    19.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 746 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    700A  LEU*     2.6    50.6    +      -       +      +
    703A  ILE*     3.5    30.0    -      -       +      +
    704A  GLN*     3.5    37.0    -      -       +      +
    707A  ILE*     3.9    15.9    -      -       +      -
    742A  ALA      3.3    15.8    +      -       -      +
    743A  PRO      4.1     0.2    -      -       -      +
    744A  LEU      3.3     0.4    -      -       -      -
    745A  GLY*     1.3    76.0    -      -       -      +
    747A  ASN*     1.3    62.2    +      -       -      +
    749A  LEU*     3.2    29.4    +      -       +      +
    750A  LEU*     3.2    39.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 747 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    651A  ILE      4.2     3.6    +      -       -      -
    652A  GLY*     3.3    14.5    +      -       -      -
    655A  PRO*     3.6    22.9    -      -       +      +
    656A  ALA*     3.5    22.0    +      -       -      +
    659A  TYR*     4.6     1.3    -      -       +      -
    704A  GLN*     2.8    22.7    +      -       -      +
    743A  PRO      3.0    18.9    +      -       -      +
    744A  LEU*     3.7     0.8    -      -       -      +
    746A  TYR*     1.3    75.7    -      -       -      +
    748A  GLY*     1.3    57.8    -      -       -      +
    750A  LEU*     3.3    10.0    +      -       -      +
    751A  ILE*     3.0    36.6    +      -       +      +
    785A  TRP*     3.6    25.0    -      -       +      -
   4005A  51E      5.8     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 748 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    744A  LEU      2.9    14.8    +      -       -      -
    745A  GLY      3.0     6.2    +      -       -      -
    747A  ASN*     1.3    77.6    -      -       -      +
    749A  LEU*     1.3    56.9    +      -       -      +
    751A  ILE*     3.5     0.6    +      -       -      -
    752A  LEU*     2.9    31.9    +      -       -      +
    785A  TRP*     4.7     0.8    -      -       -      -
   4001A  OLA      3.6    37.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 749 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    745A  GLY      3.0    18.1    +      -       -      +
    746A  TYR*     3.2    25.1    +      -       +      +
    748A  GLY*     1.3    75.2    -      -       -      +
    750A  LEU*     1.3    62.8    +      -       +      +
    752A  LEU*     3.2    16.0    +      -       +      +
    753A  ALA*     2.9    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 750 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    656A  ALA*     3.9    26.2    -      -       +      -
    659A  TYR*     4.0    13.9    -      -       +      +
    660A  SER*     3.9    26.2    -      -       -      +
    663A  VAL*     4.6     5.0    -      -       +      +
    700A  LEU*     4.5    14.4    -      -       +      -
    746A  TYR*     3.2    48.4    +      -       +      +
    747A  ASN*     3.3    14.3    +      -       -      +
    749A  LEU*     1.3    78.9    -      -       +      +
    751A  ILE*     1.3    56.1    +      -       -      +
    753A  ALA*     3.4     6.6    +      -       +      +
    754A  CYS*     2.9    35.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 751 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    659A  TYR*     3.5    33.7    -      -       +      -
    747A  ASN      3.0    20.8    +      -       -      +
    748A  GLY      3.8     4.3    -      -       -      +
    750A  LEU*     1.3    75.7    -      -       -      +
    752A  LEU*     1.3    57.3    +      -       -      +
    754A  CYS*     3.4     2.9    +      -       -      +
    755A  THR*     2.9    34.3    +      -       -      -
    778A  MET*     3.6    20.4    -      -       +      -
    781A  THR*     4.0     9.6    -      -       +      -
    782A  CYS*     3.7    22.7    -      -       -      +
    785A  TRP*     3.4    42.4    -      -       +      -
   4001A  OLA      3.7    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 752 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    748A  GLY      2.9    22.4    +      -       -      +
    749A  LEU*     3.2    18.6    +      -       +      +
    751A  ILE*     1.3    79.1    -      -       -      +
    753A  ALA*     1.3    60.3    +      -       -      +
    755A  THR*     3.6     5.9    +      -       -      -
    756A  PHE*     3.1    23.0    +      -       -      +
    782A  CYS*     5.4     2.5    -      -       -      -
   4001A  OLA      4.3    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 753 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    663A  VAL*     3.8    17.0    -      -       +      -
    749A  LEU      2.9    16.3    +      -       -      +
    750A  LEU*     3.8     6.3    -      -       +      +
    752A  LEU*     1.3    73.6    -      -       -      +
    754A  CYS*     1.3    65.9    +      -       -      +
    756A  PHE*     3.4     5.9    +      -       -      +
    757A  TYR*     3.1    39.9    +      -       +      -
----------------------------------------------------------
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Residues in contact with CYS 754 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    659A  TYR*     3.1    34.5    -      -       -      -
    662A  LEU*     4.1    10.8    -      -       +      -
    663A  VAL*     3.5    17.9    -      -       -      +
    666A  THR*     4.0    12.8    +      -       +      +
    750A  LEU      2.9    26.2    +      -       -      +
    751A  ILE      3.5     0.4    -      -       -      +
    753A  ALA*     1.3    79.3    -      -       -      +
    755A  THR*     1.3    57.1    +      -       -      +
    757A  TYR*     3.4     0.9    +      -       -      -
    758A  ALA*     2.8    31.9    +      -       -      +
    778A  MET*     3.5    27.4    -      -       +      -
----------------------------------------------------------
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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
----------------------------------------------------------
    751A  ILE      2.9    18.5    +      -       -      -
    752A  LEU*     4.0     6.7    -      -       -      -
    754A  CYS*     1.3    76.0    -      -       -      +
    756A  PHE*     1.3    57.4    +      -       -      +
    758A  ALA*     3.8     2.2    -      -       +      +
    759A  PHE*     2.9    31.3    +      -       +      +
    778A  MET*     3.3    25.6    -      -       +      +
    779A  TYR*     4.3    23.1    -      -       +      -
    782A  CYS*     3.1    28.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 756 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    752A  LEU      3.1    18.4    +      -       -      +
    753A  ALA*     3.5     7.0    -      -       -      +
    754A  CYS      3.2     0.4    -      -       -      -
    755A  THR*     1.3    78.8    -      -       -      +
    757A  TYR*     1.3    96.4    +      +       -      +
    759A  PHE*     3.9     5.3    -      -       -      +
    760A  LYS*     3.3    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 757 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    663A  VAL*     4.3    10.8    -      -       +      -
    666A  THR*     3.6    31.8    -      -       -      +
    667A  TYR*     3.5    43.7    -      +       +      -
    670A  ALA*     3.5    21.1    -      -       +      -
    671A  ARG*     6.5     0.2    -      -       -      -
    753A  ALA*     3.1    29.7    +      -       +      -
    756A  PHE*     1.3   103.5    -      +       -      +
    758A  ALA*     1.3    63.3    +      -       -      +
    760A  LYS*     3.4    15.1    +      -       +      +
    761A  THR*     3.0    29.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 758 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    666A  THR*     4.2    12.5    -      -       +      -
    754A  CYS      2.8    20.2    +      -       -      +
    755A  THR*     3.8     7.9    -      -       +      +
    757A  TYR*     1.3    75.8    -      -       -      +
    759A  PHE*     1.3    64.1    +      -       -      +
    761A  THR*     3.2     8.8    +      -       -      -
    762A  ARG*     3.0    23.7    +      -       -      +
    771A  ALA      4.7     2.1    -      -       -      +
    774A  ILE*     4.5     4.0    -      -       +      +
    775A  ALA*     4.0    28.5    -      -       -      +
    778A  MET*     4.4     9.2    -      -       +      -
    779A  TYR*     6.4     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 759 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    755A  THR*     2.9    19.5    +      -       +      +
    756A  PHE*     3.9     5.4    -      -       -      +
    758A  ALA*     1.3    76.8    -      -       -      +
    760A  LYS*     1.3    63.1    +      -       -      +
    762A  ARG*     2.8    71.0    +      -       -      +
    775A  ALA*     4.8     0.4    -      -       -      +
    779A  TYR*     3.2    37.2    -      +       +      +
----------------------------------------------------------
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Residues in contact with LYS 760 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    670A  ALA*     4.1    33.3    +      -       +      +
    671A  ARG*     6.3     0.6    -      -       -      +
    673A  LEU*     3.4    20.7    -      -       +      +
    674A  ALA*     4.9    11.0    -      -       -      +
    677A  LYS*     5.9     0.6    +      -       -      +
    756A  PHE*     3.3    25.0    +      -       +      +
    757A  TYR*     3.5    22.5    -      -       +      +
    758A  ALA      3.2     0.2    -      -       -      -
    759A  PHE*     1.3    84.8    -      -       +      +
    761A  THR*     1.3    61.6    +      -       +      +
    762A  ARG*     3.5     4.0    +      -       -      +
    763A  ASN      5.4     0.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 761 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    666A  THR*     4.6     2.7    +      -       -      +
    669A  ALA*     3.4    44.6    -      -       -      +
    670A  ALA*     3.6    10.8    -      -       +      +
    673A  LEU*     4.0     8.7    -      -       +      -
    757A  TYR      3.0    17.8    +      -       -      +
    758A  ALA*     3.4     9.2    +      -       -      -
    759A  PHE      3.2     0.6    -      -       -      -
    760A  LYS*     1.3    82.3    -      -       +      +
    762A  ARG*     1.3    61.6    +      -       -      +
    763A  ASN      3.2     3.4    -      -       -      -
    764A  VAL*     3.2    22.5    +      -       +      +
    771A  ALA*     3.1    23.6    -      -       -      +
----------------------------------------------------------
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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