Contacts of the helix formed by residues 673 - 699 (chain A) in PDB entry 6A5T


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 ASP 673 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    672A  ALA*     1.3    83.2    -      -       -      +
    674A  ALA*     1.3    62.3    +      -       -      +
    675A  SER*     2.3    28.8    +      -       -      -
    676A  THR*     2.5    36.2    +      -       -      -
    677A  MET*     3.0    19.8    +      -       -      +
    737A  ASN*     5.9     0.4    +      -       -      -
    194C  GLU*     5.4     6.5    +      -       -      +
    195C  VAL*     6.3     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 674 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    673A  ASP*     1.3    79.7    -      -       -      +
    675A  SER*     1.3    65.8    +      -       -      +
    677A  MET*     2.9    10.2    +      -       -      +
    678A  LYS*     2.9    35.0    +      -       +      +
    722B  THR*     5.1     9.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 675 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    673A  ASP*     2.3    33.6    +      -       -      -
    674A  ALA*     1.3    75.4    -      -       -      +
    676A  THR*     1.3    70.0    +      -       -      -
    678A  LYS*     2.9    24.5    +      -       -      +
    679A  GLU*     3.0    16.2    +      -       -      +
    737A  ASN*     4.8     2.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 676 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    672A  ALA*     3.9    19.7    -      -       +      +
    673A  ASP*     2.5    23.9    +      -       -      -
    675A  SER*     1.3    73.8    +      -       -      +
    677A  MET*     1.3    56.4    +      -       -      +
    679A  GLU*     3.2    10.3    +      -       -      +
    680A  ILE*     2.9    55.0    +      -       +      +
    733A  SER*     4.8     4.0    -      -       -      -
    734A  ALA*     4.3    10.5    -      -       -      +
    737A  ASN*     2.1    49.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 677 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    672A  ALA*     4.4    18.2    -      -       +      +
    673A  ASP      3.0    20.2    -      -       -      +
    674A  ALA      2.9    11.2    +      -       -      +
    676A  THR*     1.3    76.8    -      -       -      +
    678A  LYS*     1.3    64.9    +      -       -      +
    680A  ILE*     4.4    14.4    -      -       +      +
    681A  THR*     2.9    31.2    +      -       -      +
    763A  SER      5.1    10.5    -      -       -      +
    764A  ALA      6.1     0.7    -      -       -      +
    804A  SER*     5.8     1.3    -      -       -      +
    807A  ARG*     3.4    37.5    -      -       +      +
    722B  THR*     3.8    30.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 678 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    674A  ALA*     2.9    28.3    +      -       +      +
    675A  SER*     2.9    13.2    +      -       -      +
    677A  MET*     1.3    76.4    -      -       +      +
    679A  GLU*     1.3    64.2    +      -       +      +
    681A  THR*     3.9     3.9    -      -       -      -
    682A  HIS*     2.9    23.9    +      -       -      +
    722B  THR*     6.0     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 679 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    675A  SER      3.0    15.9    +      -       -      +
    676A  THR*     3.6    12.2    -      -       -      +
    678A  LYS*     1.3    77.8    -      -       +      +
    680A  ILE*     1.3    60.5    +      -       +      +
    682A  HIS*     3.1     6.7    +      -       -      +
    683A  ALA*     2.9    29.0    +      -       -      +
    733A  SER*     3.8    24.1    +      -       -      +
    737A  ASN*     5.4     3.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 680 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    672A  ALA*     5.4     1.6    -      -       +      -
    676A  THR*     2.9    38.8    +      -       +      +
    677A  MET*     4.1    18.2    -      -       +      +
    679A  GLU*     1.3    73.9    -      -       -      +
    681A  THR*     1.3    66.5    +      -       -      +
    683A  ALA*     3.2     5.6    +      -       -      +
    684A  ILE*     3.1    29.2    +      -       +      +
    730A  ALA*     3.5    32.8    -      -       +      +
    733A  SER*     4.5     8.1    -      -       -      -
    734A  ALA*     4.1    19.1    -      -       +      -
    763A  SER*     5.5     1.3    -      -       -      +
    764A  ALA*     4.1    27.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 681 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    677A  MET*     2.9    20.1    +      -       -      +
    678A  LYS*     3.9     4.3    -      -       -      -
    680A  ILE*     1.3    78.6    -      -       -      +
    682A  HIS*     1.3    52.0    +      -       -      +
    684A  ILE*     3.5     4.4    +      -       -      +
    685A  SER*     2.3    44.9    +      -       -      +
    807A  ARG*     4.0    19.8    +      -       -      -
    720B  ASN*     5.0    13.5    -      -       -      +
    722B  THR*     5.7     1.9    -      -       -      +
    726B  ILE*     6.1     4.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 682 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    678A  LYS      2.9    17.3    +      -       -      +
    679A  GLU*     3.1     6.9    +      -       -      +
    681A  THR*     1.3    79.3    -      -       -      +
    683A  ALA*     1.3    65.1    +      -       -      +
    685A  SER*     3.1    11.8    -      -       -      -
    686A  SER*     2.9    31.5    +      -       -      -
    689A  GLU*     5.9     2.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 683 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    679A  GLU      2.9    13.1    +      -       -      +
    680A  ILE*     3.2    10.9    +      -       -      +
    682A  HIS*     1.3    77.2    +      -       -      +
    684A  ILE*     1.3    65.2    +      -       +      +
    686A  SER*     2.6    27.8    +      -       -      -
    687A  ALA*     3.0     6.0    +      -       -      +
    726A  ALA*     5.0     5.4    -      -       +      +
    729A  SER*     4.2    21.5    -      -       -      +
    730A  ALA*     4.9    12.3    -      -       +      +
    733A  SER*     6.0     1.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 684 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    680A  ILE*     3.1    24.2    +      -       +      +
    681A  THR*     4.2     3.4    -      -       -      +
    683A  ALA*     1.3    78.6    -      -       +      +
    685A  SER*     1.3    67.0    +      -       -      +
    687A  ALA*     3.0     9.1    +      -       +      +
    688A  LYS*     3.0    23.1    +      -       +      +
    726A  ALA*     5.2     9.0    -      -       +      +
    727A  ARG*     5.5     1.6    -      -       -      +
    730A  ALA*     4.8     9.2    -      -       +      -
    764A  ALA      4.7     1.1    -      -       -      +
    765A  CYS*     3.6    38.8    -      -       +      -
    800A  PHE*     3.8    30.1    -      -       +      -
    802A  GLU*     4.2    22.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 685 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    681A  THR*     2.3    34.5    +      -       -      +
    682A  HIS*     3.1    17.6    -      -       -      -
    684A  ILE*     1.3    80.9    -      -       -      +
    686A  SER*     1.3    63.9    +      -       -      +
    688A  LYS*     3.0     5.9    +      -       -      +
    689A  GLU*     3.0    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 686 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682A  HIS*     2.9    22.1    +      -       -      -
    683A  ALA*     2.6    24.6    +      -       -      -
    685A  SER*     1.3    75.6    -      -       -      +
    687A  ALA*     1.3    62.2    +      -       -      +
    689A  GLU*     3.3    20.4    +      -       -      +
    690A  GLN*     2.9    35.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 687 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    683A  ALA      3.0     6.6    +      -       -      +
    684A  ILE*     3.2    17.0    -      -       +      +
    685A  SER      3.0     0.2    +      -       -      -
    686A  SER*     1.3    77.0    +      -       -      +
    688A  LYS*     1.3    64.7    +      -       +      +
    690A  GLN*     3.0    22.5    +      -       -      +
    691A  VAL*     3.0    16.1    +      -       -      +
    722A  THR*     4.4     3.7    -      -       +      +
    723A  LEU*     4.4    13.0    -      -       +      -
    726A  ALA*     3.4    31.9    -      -       +      -
    800A  PHE*     5.1     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 688 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    684A  ILE*     3.0    11.6    +      -       +      +
    685A  SER*     3.0     8.7    +      -       -      +
    687A  ALA*     1.3    79.9    -      -       +      +
    689A  GLU*     1.3    62.5    +      -       +      +
    691A  VAL*     3.1     8.8    +      -       -      +
    692A  GLN*     3.0    28.7    +      -       +      +
    723A  LEU*     5.7     0.7    -      -       +      -
    794A  SER*     6.0     0.9    -      -       -      -
    795A  PRO*     4.6    16.3    -      -       +      +
    796A  GLU*     4.5    28.8    +      -       -      +
    800A  PHE*     4.6    25.6    -      -       +      -
    802A  GLU*     4.4    21.9    +      -       -      +
    726B  ILE*     5.9     1.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 689 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    682A  HIS*     5.9     2.3    +      -       -      -
    685A  SER*     3.0    24.4    +      -       -      +
    686A  SER*     3.3    22.6    +      -       -      +
    688A  LYS*     1.3    77.1    -      -       +      +
    690A  GLN*     1.3    64.8    +      -       +      +
    692A  GLN*     3.1     9.2    +      -       -      +
    693A  GLU*     3.0    33.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 690 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    686A  SER*     2.9    27.9    +      -       -      +
    687A  ALA*     3.0     7.7    +      -       -      +
    689A  GLU*     1.3    75.9    -      -       +      +
    691A  VAL*     1.3    57.9    +      -       -      +
    693A  GLU*     3.1    15.7    +      -       -      +
    694A  ILE*     2.8    39.6    +      -       +      +
    722A  THR*     3.4    24.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 691 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    687A  ALA      3.0    14.2    +      -       -      +
    688A  LYS      3.1     6.5    +      -       -      +
    690A  GLN*     1.3    78.0    -      -       -      +
    692A  GLN*     1.3    63.1    +      -       -      +
    694A  ILE*     3.1     6.4    +      -       +      +
    695A  ILE*     3.0    36.1    +      -       +      +
    719A  VAL*     4.4    25.1    -      -       +      -
    722A  THR*     4.2    10.3    -      -       +      -
    723A  LEU*     3.6    28.7    -      -       +      -
    793A  PHE      5.1     1.8    -      -       -      +
    794A  SER*     4.7     2.0    -      -       -      -
    795A  PRO*     3.8    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 692 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    688A  LYS*     3.0    15.9    +      -       +      +
    689A  GLU*     3.1    10.3    +      -       -      +
    691A  VAL*     1.3    78.3    -      -       -      +
    693A  GLU*     1.3    58.4    +      -       +      +
    695A  ILE*     3.5    10.4    +      -       -      +
    696A  TYR*     2.9    28.6    +      -       -      +
    794A  SER*     3.4    31.1    +      -       -      -
    795A  PRO*     6.4     0.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 693 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    689A  GLU*     3.0    26.2    +      -       -      +
    690A  GLN*     3.1    16.9    +      -       -      +
    692A  GLN*     1.3    77.2    -      -       +      +
    694A  ILE*     1.3    64.5    +      -       +      +
    696A  TYR*     3.2     8.5    +      -       -      +
    697A  LYS*     2.9    41.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 694 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    690A  GLN*     2.8    29.0    +      -       +      +
    691A  VAL*     3.1    10.3    +      -       +      +
    693A  GLU*     1.3    76.3    -      -       +      +
    695A  ILE*     1.3    59.9    +      -       -      +
    697A  LYS*     3.3    15.7    -      -       +      +
    698A  ALA*     2.9    24.8    +      -       -      +
    703A  LEU*     5.1     2.6    -      -       +      +
    715A  PHE*     4.6     8.1    -      -       +      -
    718A  GLU*     3.0    48.5    -      -       +      +
    719A  VAL*     4.4    17.3    -      -       +      -
    722A  THR*     3.3    28.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 695 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    691A  VAL*     3.0    27.9    +      -       +      +
    692A  GLN*     4.0     9.2    -      -       -      +
    694A  ILE*     1.3    73.1    -      -       +      +
    696A  TYR*     1.3    64.3    +      -       -      +
    697A  LYS      2.8     6.0    +      -       -      -
    698A  ALA*     2.8    13.3    +      -       -      +
    699A  GLN*     2.8    49.7    +      -       +      +
    715A  PHE*     3.5    25.1    -      -       +      -
    719A  VAL*     5.6     0.7    -      -       +      -
    793A  PHE*     3.6    39.0    -      -       +      +
    794A  SER*     4.2     6.5    -      -       -      +
     99I  LEU*     5.7     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 696 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    692A  GLN      2.9    18.6    +      -       -      +
    693A  GLU*     3.2     9.2    +      -       -      +
    695A  ILE*     1.3    76.2    -      -       -      +
    697A  LYS*     1.3    60.2    +      -       +      +
    699A  GLN*     5.6     0.4    -      -       -      -
    700A  HIS*     2.6    73.4    +      +       +      +
    702A  GLU*     4.4     8.0    -      -       -      +
     73I  LYS*     5.4     8.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 697 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    693A  GLU*     2.9    34.8    +      -       -      +
    694A  ILE*     3.3    16.1    -      -       +      +
    695A  ILE      2.8     1.0    +      -       -      -
    696A  TYR*     1.3    76.7    -      -       +      +
    698A  ALA*     1.3    58.9    +      -       +      +
    700A  HIS*     2.7    24.6    +      -       -      +
    701A  ASN      3.1     0.5    +      -       -      -
    702A  GLU*     3.1    46.2    +      -       +      +
    703A  LEU*     4.6    17.7    -      -       +      +
    718A  GLU*     5.8     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 698 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    694A  ILE      2.9    11.5    +      -       -      +
    695A  ILE      2.8     6.8    +      -       -      +
    697A  LYS*     1.3    76.1    -      -       -      +
    699A  GLN*     1.3    57.7    +      -       +      +
    701A  ASN*     2.8    21.5    +      -       -      -
    703A  LEU*     3.8    28.7    -      -       +      +
    711A  LEU*     4.8    18.6    -      -       +      +
    715A  PHE*     3.8    29.2    -      -       +      -
     97I  MET*     5.2     5.4    -      -       -      +
     98I  THR*     5.4     1.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 699 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    695A  ILE*     2.8    40.1    +      -       +      +
    698A  ALA*     1.3    72.9    -      -       +      +
    700A  HIS*     1.3    59.1    +      -       -      +
    701A  ASN      3.4     0.7    -      -       -      -
    715A  PHE*     5.7     0.9    -      -       +      -
    791A  ASP*     5.1     4.9    +      -       -      +
    793A  PHE*     3.7    32.9    -      -       -      -
     85I  PHE*     5.0     1.6    -      -       -      -
     87I  GLN*     5.4     3.4    -      -       -      +
     97I  MET*     3.4    40.4    +      -       +      +
     98I  THR*     4.2     3.7    -      -       -      -
     99I  LEU*     3.2    47.2    +      -       +      +
    112I  ASP*     2.9    23.7    -      -       -      +
----------------------------------------------------------
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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