Contacts of the helix formed by residues 85 - 109 (chain H) in PDB entry 3I6A


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 85 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83H  GLY      3.6     1.0    -      -       -      -
     84H  LYS*     1.3   102.0    -      -       +      +
     86H  ILE*     1.3    66.0    +      -       +      +
     87H  LYS*     3.0    11.5    +      -       -      +
     88H  GLU*     2.8    24.5    +      -       -      +
     89H  ARG*     3.0    35.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 86 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74G  TYR*     3.4    38.1    -      -       +      +
     77G  SER*     3.8    16.4    -      -       -      +
     78G  LYS*     3.4    40.4    -      -       +      +
     85H  ASP*     1.3    77.4    -      -       +      +
     87H  LYS*     1.3    72.5    +      -       +      +
     89H  ARG*     3.3    23.5    +      -       -      +
     90H  ALA*     3.1    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 87 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     61G  ASP*     3.9    24.4    +      -       -      +
     63G  MET*     4.5    14.9    -      -       +      +
     74G  TYR*     4.2    21.3    -      -       +      -
     85H  ASP*     3.0     9.9    +      -       -      +
     86H  ILE*     1.3    86.2    -      -       +      +
     88H  GLU*     1.3    66.6    +      -       +      +
     90H  ALA*     3.3    15.4    +      -       -      +
     91H  LEU*     3.3    18.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 88 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83H  GLY*     3.4    10.0    -      -       -      -
     84H  LYS*     3.0    51.8    +      -       -      +
     85H  ASP*     2.8    27.0    +      -       -      +
     87H  LYS*     1.3    72.8    -      -       +      +
     89H  ARG*     1.3    58.3    +      -       -      +
     91H  LEU*     3.3    10.3    +      -       +      +
     92H  ILE*     2.9    33.3    +      -       -      +
    149H  VAL*     3.9    17.1    -      -       +      +
    150H  GLY*     3.4    30.6    -      -       -      +
    152H  LYS*     5.9     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 89 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     77G  SER*     3.1    27.1    +      -       -      -
     77H  SER*     5.6     1.1    -      -       -      -
     82H  TYR*     2.9    51.6    +      -       +      +
     83H  GLY      5.4     1.2    +      -       -      -
     84H  LYS      4.7     2.4    +      -       -      -
     85H  ASP*     3.0    33.3    +      -       -      +
     86H  ILE*     3.3    29.2    -      -       +      +
     87H  LYS      3.2     0.2    -      -       -      -
     88H  GLU*     1.3    77.2    -      -       -      +
     90H  ALA*     1.3    55.8    +      -       -      +
     92H  ILE*     3.8     7.3    -      -       -      +
     93H  ASP*     2.9    41.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 90 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63G  MET*     4.0    15.9    -      -       +      -
     65G  LEU*     4.0    28.7    -      -       +      +
     70G  ALA*     4.1     6.6    -      -       -      +
     74G  TYR*     4.2    10.1    -      -       +      +
     86H  ILE      3.1    13.2    +      -       -      +
     87H  LYS      3.6     9.4    -      -       -      +
     88H  GLU      3.3     0.4    -      -       -      -
     89H  ARG*     1.3    75.2    -      -       -      +
     91H  LEU*     1.3    59.0    +      -       -      +
     93H  ASP*     4.0     5.6    -      -       -      +
     94H  MET*     3.0    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 91 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63G  MET*     5.0    13.0    -      -       +      -
     87H  LYS      3.3    12.5    +      -       -      +
     88H  GLU*     3.3    11.3    +      -       +      +
     90H  ALA*     1.3    80.2    -      -       -      +
     92H  ILE*     1.3    63.0    +      -       -      +
     94H  MET*     3.7    21.9    -      -       +      +
     95H  TYR*     3.1    49.8    +      -       +      +
    149H  VAL*     4.0    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 92 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     82H  TYR*     3.4    44.2    -      -       +      +
     83H  GLY*     3.5     9.9    -      -       -      +
     88H  GLU      2.9    22.4    +      -       -      +
     89H  ARG*     3.8     4.5    -      -       -      +
     91H  LEU*     1.3    75.3    -      -       -      +
     93H  ASP*     1.3    58.0    +      -       -      +
     95H  TYR*     3.2     4.8    +      -       -      +
     96H  ILE*     3.0    43.7    +      -       +      +
    149H  VAL*     3.9    24.5    -      -       +      -
    154H  SER*     4.0    18.2    -      -       -      +
    155H  ARG*     3.7    32.3    -      -       +      -
    156H  ALA*     4.5     3.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 93 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69G  ARG      4.9     0.2    -      -       -      -
     70G  ALA*     3.7    22.3    -      -       +      +
     73G  ASN*     3.0    35.0    +      -       -      +
     74G  TYR      5.3     0.2    +      -       -      -
     73H  ASN*     5.0     0.3    -      -       -      +
     82H  TYR*     2.5    34.3    +      -       -      -
     89H  ARG*     2.9    32.2    +      -       -      +
     90H  ALA*     4.0     2.3    +      -       -      +
     92H  ILE*     1.3    70.6    -      -       -      +
     94H  MET*     1.3    66.8    +      -       -      +
     96H  ILE*     3.8    12.0    -      -       -      +
     97H  GLU*     3.0    33.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 94 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51G  MET*     3.7    23.3    -      -       -      +
     52G  PHE*     3.2    19.6    -      -       -      -
     63G  MET*     6.1     0.4    -      -       +      -
     64G  LYS      3.9    11.7    -      -       -      +
     65G  LEU*     3.7    21.3    -      -       +      -
     66G  VAL*     3.6    48.0    -      -       +      +
     67G  GLN*     3.7     4.9    -      -       -      +
     70G  ALA*     3.5    10.7    -      -       +      +
     90H  ALA      3.0    14.2    +      -       -      +
     91H  LEU*     3.7    25.8    -      -       +      +
     93H  ASP*     1.3    78.2    -      -       -      +
     95H  TYR*     1.3    72.3    +      -       +      +
     98H  GLY      3.4     6.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 95 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     51G  MET*     3.4    35.2    -      -       +      -
     52G  PHE*     4.2     1.6    -      -       -      -
     91H  LEU*     3.1    41.9    +      -       +      +
     92H  ILE      3.6     3.4    -      -       -      +
     93H  ASP      3.2     0.2    -      -       -      -
     94H  MET*     1.3    87.9    -      -       +      +
     96H  ILE*     1.3    65.5    +      -       +      +
     98H  GLY*     3.3     2.4    +      -       -      -
     99H  ILE*     3.3    11.3    +      -       +      +
    136H  PHE*     3.2    36.0    -      +       +      -
    139H  VAL*     3.1    36.7    -      -       +      +
    148H  LEU*     4.3    17.7    +      -       +      -
    149H  VAL*     3.5    28.7    -      -       +      -
    156H  ALA*     4.5     7.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 96 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     73H  ASN*     5.3     0.4    -      -       -      +
     92H  ILE*     3.0    27.6    +      -       +      +
     93H  ASP*     3.6    16.4    -      -       -      +
     95H  TYR*     1.3    74.1    -      -       -      +
     97H  GLU*     1.3    71.3    +      -       +      +
     98H  GLY      3.3     0.2    -      -       -      -
     99H  ILE*     3.3    14.9    +      -       +      +
    100H  ALA*     2.8    28.1    +      -       -      +
    155H  ARG*     3.3    46.7    -      -       -      +
    156H  ALA*     3.7    33.0    -      -       +      -
    159H  HIS*     3.9    16.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 97 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     67G  GLN*     3.4    31.8    -      -       +      +
     69G  ARG*     3.5    33.9    +      -       +      +
     70G  ALA      4.8     0.4    -      -       -      +
   5107G  GSH      5.1     0.5    +      -       -      -
     69H  ARG*     2.9    47.5    +      -       -      +
     93H  ASP*     3.0    28.7    +      -       +      +
     96H  ILE*     1.3    81.8    -      -       +      +
     98H  GLY*     1.3    61.6    +      -       -      +
    100H  ALA*     3.6     4.1    -      -       -      +
    101H  ASP*     2.9    35.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 98 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     52G  PHE*     3.7    21.1    -      -       -      -
     67G  GLN*     3.4    15.6    -      -       -      +
     94H  MET      3.4     4.2    +      -       -      -
     95H  TYR      3.3     4.2    +      -       -      -
     96H  ILE      3.3     0.4    -      -       -      -
     97H  GLU*     1.3    78.8    -      -       -      +
     99H  ILE*     1.3    60.8    +      -       -      +
    101H  ASP*     3.3     2.8    +      -       -      +
    102H  LEU*     3.2    16.8    +      -       -      +
    132H  TYR*     3.2    25.6    -      -       -      -
    136H  PHE*     4.9     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 99 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95H  TYR*     3.3    18.7    +      -       +      +
     96H  ILE*     3.4    17.7    -      -       +      +
     98H  GLY*     1.3    75.8    -      -       -      +
    100H  ALA*     1.3    52.1    +      -       -      +
    102H  LEU*     3.3     7.0    +      -       -      +
    103H  GLY*     2.6    33.6    +      -       -      -
    132H  TYR*     5.5     0.2    -      -       -      -
    136H  PHE*     3.6    22.2    -      -       +      -
    148H  LEU*     5.6     0.9    -      -       +      -
    156H  ALA      4.3     4.7    -      -       -      +
    159H  HIS*     3.7    28.0    -      -       +      +
    160H  LEU*     3.7    36.6    -      -       +      +
    163H  LEU*     4.2    18.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 100 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69H  ARG*     3.7    27.4    -      -       -      +
     96H  ILE      2.8    16.4    +      -       -      +
     97H  GLU*     3.6    11.4    -      -       -      +
     98H  GLY      3.2     0.2    -      -       -      -
     99H  ILE*     1.3    73.4    -      -       -      +
    101H  ASP*     1.3    61.8    +      -       -      +
    103H  GLY*     4.3     1.8    -      -       -      +
    104H  GLU*     2.8    34.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 101 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54G  GLN*     3.8    10.6    +      -       -      +
     67G  GLN*     3.2    12.1    +      -       -      -
   5107G  GSH      2.9    37.3    +      -       -      +
     69H  ARG*     5.4     2.6    +      -       -      -
     97H  GLU*     2.9    19.1    +      -       -      +
     98H  GLY      3.5     8.1    -      -       -      +
    100H  ALA*     1.3    80.1    -      -       -      +
    102H  LEU*     1.3    61.4    +      -       -      +
    104H  GLU*     3.5    10.4    -      -       -      +
    105H  MET*     3.3    20.3    -      -       -      +
    132H  TYR*     3.5    14.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 102 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98H  GLY      3.2     8.5    +      -       -      +
     99H  ILE*     3.6     7.4    -      -       -      +
    101H  ASP*     1.3    77.0    -      -       -      +
    103H  GLY*     1.3    66.6    +      -       -      +
    105H  MET*     3.0    26.6    +      -       -      +
    106H  ILE*     3.3    13.4    +      -       +      +
    124H  ILE*     3.8    30.1    -      -       +      +
    127H  LYS*     5.1     0.7    -      -       +      -
    128H  ILE*     4.0    21.8    -      -       +      +
    132H  TYR*     3.7    44.6    +      -       +      -
    133H  PHE*     5.4     1.6    -      -       +      -
    136H  PHE*     6.2     0.2    -      -       +      -
    163H  LEU*     3.5    35.7    -      -       +      -
    167H  VAL*     5.3     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 103 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99H  ILE*     2.6    22.1    +      -       -      -
    100H  ALA*     3.7     2.5    -      -       -      -
    102H  LEU*     1.3    73.6    -      -       -      +
    104H  GLU*     1.3    55.9    +      -       -      +
    106H  ILE*     3.2    14.4    +      -       -      +
    107H  ILE*     3.0    41.1    +      -       -      +
    163H  LEU*     5.1     4.0    -      -       -      +
    166H  TYR*     6.3     1.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 104 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15H  ARG*     2.8    45.3    +      -       -      -
    100H  ALA      2.8    18.9    +      -       -      +
    101H  ASP*     3.5     9.6    -      -       -      +
    102H  LEU      3.1     0.2    -      -       -      -
    103H  GLY*     1.3    78.3    -      -       -      +
    105H  MET*     1.3    61.2    +      -       +      +
    107H  ILE*     3.4     9.9    +      -       -      +
    108H  MET*     3.1    34.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 105 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101H  ASP      3.3    18.8    -      -       -      +
    102H  LEU*     3.0    21.3    +      -       -      +
    104H  GLU*     1.3    74.7    -      -       +      +
    106H  ILE*     1.3    64.1    +      -       +      +
    108H  MET*     3.7     3.2    +      -       -      +
    109H  LEU*     3.1    22.9    +      -       -      +
    120H  LYS*     3.3    33.5    +      -       -      +
    123H  LEU*     4.7     9.9    -      -       +      -
    124H  ILE*     4.0    25.0    -      -       +      +
    127H  LYS*     4.2    32.5    -      -       +      -
    132H  TYR*     5.4     3.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 106 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13H  ARG*     6.4     0.2    -      -       -      +
    102H  LEU*     3.7    16.2    -      -       +      +
    103H  GLY*     3.4    10.5    -      -       -      +
    104H  GLU      3.2     0.2    -      -       -      -
    105H  MET*     1.3    78.1    -      -       -      +
    107H  ILE*     1.3    66.1    +      -       +      +
    109H  LEU*     3.2    25.9    +      -       +      +
    110H  PRO*     3.3     7.3    -      -       -      +
    124H  ILE*     4.4    20.9    -      -       +      -
    128H  ILE*     5.8     0.7    -      -       +      -
    163H  LEU*     3.7    31.0    -      -       +      -
    166H  TYR*     4.3    29.8    -      -       +      -
    167H  VAL*     5.1     4.5    -      -       +      -
    170H  LEU*     5.8    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 107 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     13H  ARG*     6.5     0.2    -      -       +      -
     14H  GLY*     3.8    39.0    -      -       -      +
     15H  ARG*     4.6    23.1    -      -       +      +
    103H  GLY*     3.0    28.1    +      -       -      +
    104H  GLU*     3.7    13.2    -      -       -      +
    105H  MET      3.3     0.2    -      -       -      -
    106H  ILE*     1.3    80.8    -      -       +      +
    108H  MET*     1.3    70.1    +      -       -      +
    110H  PRO*     3.1    16.7    -      -       -      +
    111H  PHE*     4.0    12.7    -      -       +      -
    166H  TYR*     6.4     1.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 108 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     15H  ARG*     3.9    22.9    -      -       -      -
    104H  GLU*     3.1    30.1    +      -       +      +
    105H  MET*     4.3     4.0    -      -       -      +
    107H  ILE*     1.3    81.8    -      -       -      +
    109H  LEU*     1.3    57.9    +      -       -      +
    110H  PRO*     3.3     0.2    -      -       -      -
    111H  PHE*     2.8    49.9    +      -       +      +
    112H  CYS*     3.6     7.4    +      -       -      -
    120H  LYS*     5.5     5.8    -      -       -      -
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Residues in contact with LEU 109 (chain H). Click here for Legend to table.
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                                  Specific contacts
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     Residue       Dist    Surf   HB    Arom    Phob    DC
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    105H  MET      3.1    12.6    +      -       -      +
    106H  ILE*     3.2    19.7    -      -       +      +
    108H  MET*     1.3    75.6    -      -       -      +
    110H  PRO*     1.4    58.6    -      -       +      +
    111H  PHE      3.1     0.2    -      -       -      -
    112H  CYS*     3.2    31.6    +      -       +      +
    117H  LYS*     3.5    22.0    -      -       -      +
    120H  LYS*     3.7    31.2    -      -       +      +
    121H  LEU*     3.3    35.7    -      -       +      -
    124H  ILE*     4.2    14.8    -      -       +      -
    170H  LEU*     4.6    14.4    -      -       +      -
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
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  Atomic class           I  II  III   IV   V   VI  VII  VIII
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   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
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Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il