Contacts of the helix formed by residues 665 - 693 (chain A) in PDB entry 5A63


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 SER 665 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  PHE*     3.4    49.9    +      -       -      -
    664A  ALA*     1.3    74.3    -      -       -      +
    666A  LYS*     1.3    65.1    +      -       -      +
    667A  GLU*     3.7    11.4    +      -       -      +
    668A  LEU*     2.8    37.5    +      -       -      +
    669A  GLU*     3.0    11.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 666 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  PHE*     4.7     9.9    -      -       +      -
    664A  ALA      3.5     3.0    +      -       -      +
    665A  SER*     1.3    70.3    -      -       -      +
    667A  GLU*     1.3    57.9    +      -       +      +
    669A  GLU*     3.2    22.2    +      -       -      +
    670A  LEU*     2.9    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 667 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    210A  PHE*     6.1     1.4    -      -       -      -
    665A  SER*     3.0    10.2    -      -       -      +
    666A  LYS*     1.3    79.8    -      -       +      +
    668A  LEU*     1.3    57.9    +      -       -      +
    670A  LEU*     3.2    10.5    +      -       -      +
    671A  ILE*     2.9    35.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 668 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    664A  ALA*     4.0    21.8    -      -       +      -
    665A  SER*     2.8    24.6    +      -       -      +
    667A  GLU*     1.3    75.9    -      -       -      +
    669A  GLU*     1.3    58.0    +      -       +      +
    671A  ILE*     3.2    15.0    +      -       +      +
    672A  THR*     2.9    38.0    +      -       -      +
    146C  VAL*     5.6     1.3    -      -       +      -
    154C  PRO*     5.4     8.5    -      -       +      +
    155C  TYR*     3.7    39.7    -      -       +      +
    158C  LEU*     6.5     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 669 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    663A  ILE*     5.1     3.8    -      -       -      +
    664A  ALA*     4.1    24.4    +      -       +      +
    665A  SER      3.0    12.3    +      -       -      +
    666A  LYS*     3.2    22.3    +      -       -      +
    668A  LEU*     1.3    76.5    -      -       -      +
    670A  LEU*     1.3    56.8    +      -       -      +
    672A  THR*     3.2     7.1    +      -       -      +
    673A  LEU*     2.9    29.2    +      -       -      +
      2C  GLY      3.1    23.8    +      -       -      -
      4C  ALA*     4.8    12.7    -      -       +      +
      5C  VAL*     3.4    30.5    -      -       +      +
    144C  PRO      4.7     7.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 670 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    666A  LYS      2.9    12.4    +      -       -      +
    667A  GLU*     3.4    12.8    -      -       -      +
    669A  GLU*     1.3    76.4    -      -       -      +
    671A  ILE*     1.3    70.0    +      -       +      +
    673A  LEU*     3.2    11.0    +      -       +      +
    674A  THR*     2.9    41.3    +      -       -      +
      4C  ALA*     5.9     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 671 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    667A  GLU*     2.9    19.6    +      -       +      +
    668A  LEU*     3.4    18.8    -      -       +      +
    670A  LEU*     1.3    87.7    -      -       +      +
    672A  THR*     1.3    59.2    +      -       -      +
    674A  THR*     3.2    10.0    +      -       +      +
    675A  VAL*     2.9    39.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 672 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    668A  LEU*     2.9    22.7    +      -       -      +
    669A  GLU*     3.4    12.0    -      -       -      -
    671A  ILE*     1.3    79.8    -      -       -      +
    673A  LEU*     1.3    57.8    +      -       -      +
    675A  VAL*     3.2     7.1    +      -       -      +
    676A  GLY      2.9    24.4    +      -       -      -
      5C  VAL*     3.8    32.9    -      -       +      +
      8C  GLY*     3.7     9.3    -      -       -      -
      9C  CYS*     4.2     5.8    -      -       -      +
    158C  LEU*     3.4    38.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 673 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    669A  GLU      2.9    12.9    +      -       -      +
    670A  LEU*     3.2    13.2    +      -       +      +
    672A  THR*     1.3    76.7    -      -       -      +
    674A  THR*     1.3    61.5    +      -       -      +
    676A  GLY*     3.2     1.7    +      -       -      -
    677A  PHE*     2.9    56.8    +      -       +      +
      4C  ALA*     3.5    39.0    -      -       +      +
      7C  PHE*     4.4    12.3    -      -       +      -
      8C  GLY*     4.0    11.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 674 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    670A  LEU*     2.9    27.2    +      -       -      +
    671A  ILE*     3.3    14.0    -      -       +      +
    673A  LEU*     1.3    81.4    -      -       -      +
    675A  VAL*     1.3    55.1    +      -       +      +
    677A  PHE*     3.4     4.0    +      -       -      +
    678A  GLY*     2.6    36.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 675 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    671A  ILE*     2.9    27.8    +      -       +      +
    672A  THR*     3.4    10.8    -      -       -      +
    674A  THR*     1.3    78.9    -      -       +      +
    676A  GLY*     1.3    54.0    +      -       -      +
    678A  GLY*     4.8     0.9    -      -       -      -
    679A  ILE*     2.6    42.6    +      -       +      +
     12C  VAL*     3.7     9.9    -      -       +      -
    158C  LEU*     4.9     6.5    -      -       +      -
    162C  PHE*     3.5    35.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 676 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    672A  THR      2.9    11.1    +      -       -      -
    673A  LEU      3.6     3.6    -      -       -      -
    675A  VAL*     1.3    76.0    -      -       -      +
    677A  PHE*     1.3    57.0    -      -       -      +
    679A  ILE*     3.3     1.4    -      -       -      +
    680A  LEU*     2.9    25.6    +      -       -      +
      8C  GLY*     3.3    26.9    -      -       -      -
     11C  PHE*     3.2    21.3    -      -       -      +
     12C  VAL*     3.9     6.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 677 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    673A  LEU*     2.9    49.2    +      -       +      +
    674A  THR*     3.9     4.3    -      -       -      +
    676A  GLY*     1.3    72.7    -      -       -      +
    678A  GLY*     1.3    54.4    +      -       -      +
    680A  LEU*     3.5     9.5    -      -       +      +
    681A  ILE*     2.8    59.2    +      -       +      +
      7C  PHE*     5.8     0.9    -      -       +      -
     11C  PHE*     3.7    34.5    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLY 678 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    674A  THR*     2.6    23.7    +      -       -      -
    675A  VAL*     3.6     1.1    -      -       -      -
    677A  PHE*     1.3    72.6    -      -       -      +
    679A  ILE*     1.3    56.9    +      -       -      +
    681A  ILE*     3.2     8.5    +      -       -      +
    682A  PHE*     2.9    30.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 679 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    675A  VAL*     2.6    31.2    +      -       +      +
    676A  GLY*     3.3     7.4    -      -       -      +
    678A  GLY*     1.3    71.0    -      -       -      +
    680A  LEU*     1.3    58.9    +      -       -      +
    682A  PHE*     3.3    21.5    +      -       +      +
    683A  SER*     2.9    29.3    +      -       -      -
     11C  PHE      3.9     3.4    -      -       -      +
     12C  VAL*     3.6    35.0    -      -       +      +
     16C  PRO*     5.1    12.6    -      -       +      -
    162C  PHE*     4.7    15.5    -      -       +      -
    165C  ALA*     6.5     0.4    -      -       +      -
    218C  TYR*     5.8     3.8    -      -       +      +
   1245C  PC1      6.2     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 680 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    676A  GLY      2.9    17.7    +      -       -      +
    677A  PHE*     3.5    12.3    -      -       +      +
    679A  ILE*     1.3    78.5    -      -       -      +
    681A  ILE*     1.3    60.8    +      -       +      +
    683A  SER*     2.5    24.7    +      -       -      -
    684A  LEU*     2.9    35.3    +      -       +      +
     11C  PHE*     3.8    44.2    -      -       +      -
     15C  GLY*     3.7    31.6    -      -       -      +
     18C  PHE*     4.5    13.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 681 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677A  PHE*     2.8    49.3    +      -       +      +
    678A  GLY*     3.6     7.0    -      -       -      +
    680A  LEU*     1.3    79.8    -      -       +      +
    682A  PHE*     1.3    58.8    -      -       -      +
    684A  LEU*     3.2    12.4    +      -       +      +
    685A  ILE*     2.9    40.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 682 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678A  GLY      2.9    16.0    +      -       -      +
    679A  ILE*     3.5    23.8    -      -       +      +
    681A  ILE*     1.3    79.3    -      -       -      +
    683A  SER*     1.3    61.6    +      -       -      +
    685A  ILE*     3.2     8.0    +      -       +      +
    686A  VAL*     2.9    58.5    +      -       +      +
   1245C  PC1      4.7    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 683 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679A  ILE*     2.9    14.0    +      -       -      -
    680A  LEU      2.5    20.6    +      -       -      -
    682A  PHE*     1.3    83.5    -      -       -      +
    684A  LEU*     1.3    58.0    +      -       -      +
    686A  VAL*     4.8     1.1    -      -       -      -
    687A  THR*     2.6    39.3    +      -       -      -
     15C  GLY      3.5     8.7    +      -       -      -
     16C  PRO*     3.5    24.6    -      -       -      +
     19C  ALA*     3.3    14.8    -      -       -      +
   1245C  PC1      3.8    17.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 684 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    680A  LEU*     2.9    34.6    +      -       +      +
    681A  ILE*     3.4    14.4    -      -       +      +
    683A  SER*     1.3    79.6    +      -       -      +
    685A  ILE*     1.3    59.9    +      -       +      +
    688A  TYR*     3.0    33.1    +      -       -      +
     18C  PHE*     5.1     4.5    -      -       +      -
     19C  ALA*     3.6    30.3    -      -       +      +
     22C  LEU*     4.8    16.2    -      -       +      -
     23C  ILE*     3.3    15.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 685 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    681A  ILE*     2.9    29.8    +      -       +      +
    682A  PHE*     3.5    10.5    -      -       +      +
    684A  LEU*     1.3    79.4    -      -       +      +
    686A  VAL*     1.3    64.1    +      -       +      +
    688A  TYR*     3.2     7.6    +      -       +      +
    689A  CYS*     2.9    44.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 686 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682A  PHE*     2.9    55.0    +      -       +      +
    683A  SER*     4.1     3.1    -      -       -      +
    685A  ILE*     1.3    79.1    -      -       +      +
    687A  THR*     1.3    58.8    +      -       -      +
    689A  CYS*     3.2     8.1    +      -       -      +
    690A  ILE*     2.9    52.8    +      -       +      +
   1245C  PC1      4.8    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 687 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    683A  SER*     2.6    25.0    +      -       -      -
    686A  VAL*     1.3    77.5    -      -       -      +
    688A  TYR*     1.3    56.8    +      -       -      +
    690A  ILE*     3.2    12.1    +      -       -      +
    691A  ASN*     2.9    27.4    +      -       -      +
     19C  ALA*     4.0     5.4    -      -       -      +
     20C  LEU*     3.2    35.3    -      -       +      +
     23C  ILE*     3.5    30.5    -      -       +      -
     24C  THR*     4.1    10.1    -      -       -      +
   1245C  PC1      4.0    16.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 688 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    684A  LEU      3.0    20.8    +      -       -      +
    685A  ILE*     3.4     7.9    -      -       +      +
    687A  THR*     1.3    78.2    -      -       -      +
    689A  CYS*     1.3    62.1    +      -       -      +
    691A  ASN*     3.2     6.5    +      -       +      +
    692A  ALA*     2.9    35.5    +      -       +      +
     23C  ILE*     3.5    25.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with CYS 689 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    685A  ILE*     2.9    33.5    +      -       -      -
    686A  VAL*     3.4    11.2    -      -       -      +
    688A  TYR*     1.3    81.5    -      -       -      +
    690A  ILE*     1.3    58.8    +      -       +      +
    692A  ALA*     3.2     8.9    +      -       -      +
    693A  LYS*     2.9    34.7    +      -       +      +
    697A  LEU*     5.4     0.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 690 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    686A  VAL*     2.9    41.2    +      -       +      +
    687A  THR      3.5     5.6    -      -       -      +
    689A  CYS*     1.3    77.6    -      -       +      +
    691A  ASN*     1.3    61.7    +      -       -      +
    693A  LYS      3.0     4.3    -      -       -      -
    694A  ALA*     3.0    22.9    +      -       -      +
    697A  LEU*     4.0    24.5    -      -       +      -
    698A  PHE*     4.2    13.9    -      -       +      -
    229C  PHE*     6.2     2.0    -      -       +      -
   1245C  PC1      3.6    66.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 691 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    687A  THR      2.9     6.7    +      -       -      +
    688A  TYR*     3.2    11.7    +      -       +      +
    690A  ILE*     1.3    74.8    -      -       -      +
    692A  ALA*     1.3    63.5    +      -       -      +
    694A  ALA*     3.3    20.3    +      -       -      +
     23C  ILE*     3.4    44.9    +      -       +      +
     24C  THR*     4.3     6.6    -      -       -      +
     31C  ARG*     5.1     2.4    +      -       -      -
   1245C  PC1      3.9    25.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 692 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    688A  TYR*     2.9    24.6    +      -       +      +
    689A  CYS*     3.2    12.8    +      -       -      +
    691A  ASN*     1.3    78.9    -      -       -      +
    693A  LYS*     1.3    70.2    -      -       +      +
    694A  ALA      3.5     2.1    +      -       -      -
    695A  ASP      5.3     0.2    +      -       -      -
    696A  VAL*     5.2     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 693 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689A  CYS*     2.9    17.1    +      -       +      +
    690A  ILE      3.0     3.8    -      -       -      -
    692A  ALA*     1.3    86.8    -      -       +      +
    694A  ALA*     1.3    58.1    +      -       -      +
    695A  ASP      3.6     2.2    -      -       -      -
    696A  VAL*     3.8    26.7    -      -       +      +
    697A  LEU*     3.0    37.0    +      -       +      +
    241C  ARG      4.5     1.2    +      -       -      -
    242C  SER*     2.4    57.5    +      -       -      +
    244C  LEU*     2.9    19.8    +      -       -      +
----------------------------------------------------------
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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