Contacts of the helix formed by residues 155 - 186 (chain A) in PDB entry 6M85


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 CYS 155 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    104A  ILE*     4.9     1.3    -      -       +      -
    108A  HIS*     3.6    21.5    -      -       -      -
    123A  CYS*     2.0    59.0    -      -       +      +
    152A  THR*     4.6     2.5    +      -       -      +
    153A  GLU      3.5     0.8    -      -       -      -
    154A  GLU*     1.3    81.0    -      -       -      +
    156A  PRO*     1.3    67.1    -      -       -      +
    157A  LEU*     3.1     3.9    +      -       +      +
    158A  ALA*     3.1    10.5    +      -       +      +
    159A  VAL*     3.1    25.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    153A  GLU      5.0     2.4    -      -       -      +
    154A  GLU      3.3    12.1    -      -       -      +
    155A  CYS*     1.3    82.2    -      -       -      +
    157A  LEU*     1.3    57.1    +      -       -      +
    159A  VAL*     3.7    10.3    -      -       +      +
    160A  PHE*     2.9    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    100A  ILE*     6.0     0.4    -      -       +      -
    104A  ILE*     4.1    24.0    -      -       +      -
    155A  CYS*     3.1     4.1    +      -       +      -
    156A  PRO*     1.3    75.8    -      -       -      +
    158A  ALA*     1.3    55.6    +      -       -      +
    160A  PHE*     3.2    15.9    +      -       +      +
    161A  MET*     2.8    60.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  PHE*     3.8     4.2    -      -       +      -
    104A  ILE*     4.1    18.0    -      -       +      +
    123A  CYS*     4.0    18.8    -      -       +      +
    124A  VAL*     4.3    16.6    -      -       +      -
    151A  VAL*     4.4     3.8    -      -       +      -
    152A  THR      5.9     0.2    -      -       -      +
    155A  CYS*     3.1    22.7    +      -       +      +
    157A  LEU*     1.3    73.3    -      -       -      +
    159A  VAL*     1.3    65.4    +      -       -      +
    161A  MET*     3.2     4.7    +      -       -      +
    162A  VAL*     3.0    28.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  VAL*     4.6     9.0    -      -       +      -
    152A  THR      3.7    21.5    -      -       -      +
    153A  GLU*     4.9     7.4    -      -       -      +
    155A  CYS      3.1    16.5    +      -       -      +
    156A  PRO*     3.7    11.0    -      -       +      +
    158A  ALA*     1.3    71.9    -      -       -      +
    160A  PHE*     1.3    68.4    +      -       -      +
    162A  VAL*     3.2     6.3    +      -       -      +
    163A  VAL*     3.1    30.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156A  PRO      2.9    20.7    +      -       -      +
    157A  LEU*     3.4    14.4    -      -       +      +
    159A  VAL*     1.3    76.6    -      -       -      +
    161A  MET*     1.3    82.3    +      -       +      +
    163A  VAL*     3.2    15.7    +      -       +      +
    164A  VAL*     2.9    51.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  PHE*     4.0    24.4    -      -       +      -
    100A  ILE*     3.7    39.5    -      -       +      -
    101A  PHE*     3.7    17.9    -      -       +      -
    104A  ILE*     4.6     0.7    -      -       +      -
    157A  LEU*     2.8    55.0    +      -       +      +
    158A  ALA*     3.6     7.2    -      -       -      +
    159A  VAL      3.2     0.4    -      -       -      -
    160A  PHE*     1.3    89.0    -      -       +      +
    162A  VAL*     1.3    59.6    +      -       -      +
    164A  VAL*     3.9     5.3    -      -       -      +
    165A  GLN*     2.9    30.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    101A  PHE*     3.9    16.8    -      -       +      -
    136A  PHE*     4.1    19.1    -      -       +      -
    140A  THR*     4.0    17.2    -      -       +      +
    151A  VAL*     4.1    21.5    -      -       +      -
    158A  ALA      3.0    18.7    +      -       -      +
    159A  VAL*     3.2     8.0    +      -       +      +
    161A  MET*     1.3    72.6    -      -       -      +
    163A  VAL*     1.3    67.1    +      -       +      +
    165A  GLN*     4.0     4.1    -      -       -      +
    166A  SER*     2.9    36.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    159A  VAL*     3.1    28.6    +      -       +      +
    160A  PHE*     3.3    17.5    -      -       +      +
    162A  VAL*     1.3    78.2    -      -       +      +
    164A  VAL*     1.3    63.6    +      -       +      +
    166A  SER*     3.6     5.3    +      -       -      -
    167A  ILE*     3.3    37.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     97A  PHE*     3.9    20.6    -      -       +      -
    160A  PHE*     2.9    55.0    +      -       +      +
    161A  MET*     3.9     7.2    -      -       -      +
    162A  VAL      3.3     0.2    -      -       -      -
    163A  VAL*     1.3    77.6    -      -       +      +
    165A  GLN*     1.3    60.5    +      -       -      +
    167A  ILE*     3.1    10.2    +      -       +      +
    168A  VAL*     2.9    35.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     94A  TRP*     4.6     0.2    -      -       -      -
     97A  PHE*     3.2    32.1    -      -       +      +
    101A  PHE*     3.3    23.9    -      -       -      -
    137A  SER*     2.7    41.9    +      -       -      +
    140A  THR*     3.6    16.0    -      -       +      +
    141A  GLN*     3.1    36.6    +      -       +      +
    161A  MET      2.9    18.2    +      -       -      +
    162A  VAL*     4.0     4.0    -      -       -      +
    164A  VAL*     1.3    76.4    -      -       -      +
    166A  SER*     1.3    57.2    +      -       -      +
    168A  VAL*     3.8     1.5    -      -       -      +
    169A  GLY*     2.9    26.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  THR*     4.6    13.1    +      -       -      +
    141A  GLN*     5.7     1.6    -      -       -      +
    162A  VAL*     2.9    31.6    +      -       -      +
    163A  VAL*     3.7     7.6    -      -       -      -
    165A  GLN*     1.3    75.6    -      -       -      +
    167A  ILE*     1.3    59.5    +      -       -      +
    169A  GLY*     3.3     2.7    +      -       -      -
    170A  CYS*     3.1    33.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  VAL*     3.3    30.7    +      -       +      +
    164A  VAL*     3.1     9.9    +      -       +      +
    166A  SER*     1.3    75.2    -      -       -      +
    168A  VAL*     1.3    67.4    +      -       +      +
    170A  CYS*     3.3     8.7    +      -       +      +
    171A  ILE*     3.0    40.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  SER*     4.7     6.3    -      -       -      -
     97A  PHE*     4.4    19.1    -      -       +      -
    141A  GLN*     4.8     2.0    -      -       -      +
    164A  VAL*     2.9    33.6    +      -       +      +
    165A  GLN*     3.8     6.7    -      -       -      +
    167A  ILE*     1.3    77.0    -      -       +      +
    169A  GLY*     1.3    57.0    +      -       -      +
    171A  ILE*     3.2    11.6    +      -       +      +
    172A  ILE*     2.9    50.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  PHE*     6.5     0.2    -      -       -      -
    141A  GLN*     3.7    30.3    -      -       -      +
    165A  GLN      2.9    18.1    +      -       -      -
    166A  SER*     3.6     2.9    -      -       -      -
    167A  ILE      3.2     0.4    -      -       -      -
    168A  VAL*     1.3    77.2    -      -       -      +
    170A  CYS*     1.3    60.7    +      -       -      +
    172A  ILE*     3.4     2.0    +      -       -      +
    173A  ASP*     3.0    33.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with CYS 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  SER*     3.1    19.0    +      -       -      +
    167A  ILE*     3.3    10.5    +      -       +      +
    169A  GLY*     1.3    74.2    -      -       -      +
    171A  ILE*     1.3    57.6    +      -       +      +
    173A  ASP*     3.6     5.3    +      -       -      +
    174A  SER*     2.8    39.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167A  ILE*     3.0    33.3    +      -       +      +
    168A  VAL*     3.2    12.1    +      -       +      +
    170A  CYS*     1.3    75.5    -      -       +      +
    172A  ILE*     1.3    70.2    +      -       +      +
    174A  SER*     3.3     4.5    +      -       -      -
    175A  PHE*     3.0    46.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  PHE*     4.6     9.4    -      -       +      -
     89A  ALA*     4.2    21.1    -      -       +      +
     90A  PHE*     3.6    30.5    -      -       +      -
     93A  SER*     3.7    24.7    -      -       -      +
    141A  GLN*     3.8     7.2    -      -       -      +
    168A  VAL*     2.9    39.1    +      -       +      +
    169A  GLY*     3.9     4.3    -      -       -      +
    171A  ILE*     1.3    78.6    -      -       +      +
    173A  ASP*     1.3    63.4    +      -       -      +
    175A  PHE*     3.3     6.4    +      -       -      +
    176A  MET*     3.0    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     90A  PHE*     3.7    24.3    -      -       -      -
    141A  GLN      5.5     3.2    -      -       -      +
    169A  GLY*     3.0    20.3    +      -       -      +
    170A  CYS*     3.8     5.8    -      -       -      +
    172A  ILE*     1.3    74.0    -      -       -      +
    174A  SER*     1.3    62.9    +      -       -      +
    176A  MET*     3.0    10.4    +      -       -      +
    177A  ILE*     3.0    33.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  CYS*     2.8    24.7    +      -       -      +
    171A  ILE*     3.7     5.6    -      -       -      -
    173A  ASP*     1.3    76.9    -      -       -      +
    175A  PHE*     1.3    60.6    +      -       -      +
    177A  ILE*     3.4    12.8    +      -       -      +
    178A  GLY*     3.0    23.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     86A  PHE*     4.2     9.6    -      +       +      -
    171A  ILE*     3.0    44.6    +      -       +      +
    172A  ILE*     3.6     6.5    -      -       -      +
    174A  SER*     1.3    76.7    -      -       -      +
    176A  MET*     1.3    59.9    +      -       -      +
    178A  GLY*     3.7     1.1    -      -       -      +
    179A  ALA*     2.8    32.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     83A  LEU*     5.7     6.1    -      -       +      -
     86A  PHE*     3.6    38.7    -      -       +      -
     90A  PHE*     3.8    32.8    -      -       +      -
    172A  ILE      3.0    12.7    +      -       -      +
    173A  ASP*     3.0    11.6    +      -       -      +
    175A  PHE*     1.3    77.0    -      -       -      +
    177A  ILE*     1.3    58.8    +      -       +      +
    179A  ALA*     3.9     0.5    -      -       -      +
    180A  ILE*     3.0    51.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  ASP*     3.0    26.6    +      -       +      +
    174A  SER*     3.7    11.0    -      -       -      +
    175A  PHE      3.3     0.4    -      -       -      -
    176A  MET*     1.3    77.0    -      -       +      +
    178A  GLY*     1.3    57.3    +      -       -      +
    180A  ILE*     3.4     7.3    +      -       -      +
    181A  MET*     3.0    49.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  SER      3.0    14.7    +      -       -      -
    175A  PHE*     3.7     3.1    -      -       -      -
    177A  ILE*     1.3    76.0    -      -       -      +
    179A  ALA*     1.3    58.8    +      -       -      +
    181A  MET*     3.3     6.1    +      -       -      +
    182A  ALA*     2.8    31.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  CYS*     3.4    31.8    -      -       -      -
     82A  MET*     4.1     6.5    -      -       -      +
     86A  PHE*     3.5    29.2    -      -       +      -
    175A  PHE      2.8    21.7    +      -       -      +
    176A  MET      4.0     0.2    -      -       -      +
    178A  GLY*     1.3    71.2    -      -       -      +
    180A  ILE*     1.3    62.5    +      -       -      +
    182A  ALA*     3.5     0.4    +      -       -      -
    183A  LYS*     3.2    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  TRP*     4.0    11.1    -      -       +      -
     82A  MET*     3.9    20.4    -      -       +      -
     83A  LEU*     4.9    10.1    -      -       +      -
     86A  PHE*     5.6     0.7    -      -       +      -
    176A  MET*     3.0    48.7    +      -       +      +
    177A  ILE*     3.7     6.5    -      -       -      +
    179A  ALA*     1.3    78.1    -      -       -      +
    181A  MET*     1.3    58.3    +      -       +      +
    183A  LYS*     3.9     1.9    -      -       -      +
    184A  MET*     2.9    56.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 181 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  ILE*     3.0    37.4    +      -       +      +
    178A  GLY*     3.3     6.5    +      -       -      +
    180A  ILE*     1.3    77.6    -      -       +      +
    182A  ALA*     1.3    58.2    +      -       -      +
    184A  MET*     3.5    12.2    -      -       -      +
    185A  ALA*     2.7    40.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  PHE*     3.5    33.7    -      -       +      -
     74A  CYS*     3.8    15.9    -      -       -      -
     75A  VAL*     3.6     6.8    -      -       +      +
    178A  GLY      2.8    17.3    +      -       -      +
    179A  ALA*     3.7     5.8    -      -       -      +
    180A  ILE      3.4     0.2    -      -       -      -
    181A  MET*     1.3    77.0    -      -       -      +
    183A  LYS*     1.3    56.2    +      -       -      +
    185A  ALA*     3.8     2.2    -      -       -      -
    186A  ARG*     2.9    35.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     74A  CYS*     4.4     8.3    -      -       -      +
     75A  VAL*     3.4    26.1    +      -       -      +
     76A  ASP      4.1     1.6    +      -       -      -
     77A  ILE      2.5    31.7    +      -       -      +
     78A  ARG*     3.7     3.4    -      -       -      +
     79A  TRP*     3.6    67.3    -      -       +      +
     82A  MET*     4.3    12.1    -      -       -      -
    179A  ALA      3.2    14.3    +      -       -      +
    182A  ALA*     1.3    76.5    -      -       -      +
    184A  MET*     1.3    66.6    +      -       -      +
    186A  ARG      3.7    15.7    +      -       -      +
    187A  PRO*     3.7     8.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with MET 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     79A  TRP*     4.2    17.0    -      -       +      -
    180A  ILE*     2.9    50.7    +      -       +      +
    181A  MET*     3.2    14.1    +      -       +      +
    183A  LYS*     1.3    78.8    -      -       -      +
    185A  ALA*     1.3    59.2    +      -       -      +
    187A  PRO*     3.8    10.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181A  MET*     2.7    22.2    +      -       +      +
    182A  ALA*     4.1     3.6    -      -       -      +
    184A  MET*     1.3    75.8    -      -       -      +
    186A  ARG*     1.3    78.7    +      -       +      +
    187A  PRO*     3.4     7.2    -      -       -      +
    308A  MET*     4.8     7.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     71A  PHE*     3.4    36.0    -      -       +      -
     75A  VAL*     3.8    29.1    -      -       +      +
    182A  ALA      2.9    17.3    +      -       -      +
    183A  LYS*     3.7     7.4    -      -       -      +
    184A  MET      3.4     0.2    -      -       -      -
    185A  ALA*     1.3    96.5    +      -       +      +
    187A  PRO*     1.3    64.4    -      -       -      +
    188A  LYS*     4.1     6.4    +      -       +      +
    308A  MET*     4.5    21.2    -      -       -      -
----------------------------------------------------------
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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