Contacts of the helix formed by residues 153 - 179 (chain A) in PDB entry 5XRA


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 TYR 153 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    141A  ILE*     3.6    48.5    -      -       +      -
    144A  SER*     3.1    36.8    +      -       -      -
    145A  ARG*     5.1     5.2    -      -       +      -
    151A  PRO*     3.8    30.9    -      -       +      +
    152A  SER*     1.3    77.5    -      -       -      +
    154A  HIS*     1.3    59.4    -      -       -      +
    155A  PHE      3.4     2.0    -      -       -      -
    156A  ILE*     4.0    20.2    -      -       +      +
    157A  GLY*     2.8    26.9    +      -       -      +
    401A  SER*     4.2    17.3    -      -       -      -
    403A  ASP*     3.0    33.1    -      -       +      +
    404A  LEU*     3.6     7.5    +      -       +      -
    604A  OLA      3.8     5.4    -      -       -      +
    606A  OLC      5.6     0.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    145A  ARG*     4.7     9.8    +      -       -      -
    152A  SER*     3.3    31.7    -      -       -      -
    153A  TYR*     1.3    76.2    -      -       -      +
    155A  PHE*     1.3    63.3    +      -       -      +
    158A  SER*     3.1    26.7    +      -       -      -
    230A  ARG*     3.7    26.3    -      -       +      +
    233A  ALA*     4.5    11.4    -      -       +      -
    234A  VAL*     3.6    24.6    -      -       +      +
    237A  PHE*     3.8    14.4    -      +       +      -
    604A  OLA      3.3    19.9    +      -       -      -
    606A  OLC      3.8    26.8    +      -       -      +
    608A  CLR      3.3    14.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  HIS*     1.3    76.9    -      -       -      +
    156A  ILE*     1.3    78.5    +      -       +      +
    157A  GLY      3.3     0.2    +      -       -      -
    158A  SER*     3.4     2.3    +      -       -      -
    159A  LEU*     3.0    30.1    +      -       +      +
    206A  SER*     3.5    20.6    -      -       -      -
    207A  LEU*     4.0    14.1    -      -       +      -
    210A  ALA*     3.4    28.7    -      -       +      -
    237A  PHE*     3.7    13.9    -      +       +      -
    397A  TYR*     3.4    57.2    -      +       +      -
    606A  OLC      3.8    21.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137A  VAL*     4.1    22.2    -      -       +      +
    141A  ILE*     4.2    11.0    -      -       +      -
    153A  TYR*     3.7    22.7    +      -       +      +
    154A  HIS      3.5     0.2    -      -       -      -
    155A  PHE*     1.3    97.2    -      -       +      +
    157A  GLY*     1.3    64.3    +      -       -      +
    159A  LEU*     3.6     5.2    +      -       -      +
    160A  ALA*     3.2    21.0    +      -       -      +
    397A  TYR*     4.4     9.9    -      -       +      +
    398A  ALA*     4.1    20.2    -      -       +      +
    401A  SER*     3.8    31.2    -      -       -      +
    404A  LEU*     5.4     2.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  LEU*     4.2     4.6    -      -       -      +
    141A  ILE*     5.0     6.7    -      -       -      -
    153A  TYR*     2.8    20.0    +      -       -      +
    156A  ILE*     1.3    76.9    -      -       -      +
    158A  SER*     1.3    64.1    +      -       -      +
    160A  ALA*     3.1    15.4    +      -       -      +
    161A  VAL*     3.1    20.7    +      -       -      +
    604A  OLA      4.2    17.3    -      -       -      -
    608A  CLR      4.5     3.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  HIS      3.1    20.2    +      -       -      -
    155A  PHE      3.9     0.7    -      -       -      -
    157A  GLY*     1.3    73.5    -      -       -      +
    159A  LEU*     1.3    62.5    +      -       -      +
    161A  VAL*     3.2     2.3    +      -       -      +
    162A  ALA*     3.0    22.5    +      -       -      +
    206A  SER*     2.6    25.9    +      -       -      -
    237A  PHE*     3.6    20.7    -      -       -      -
    241A  TRP*     3.1    22.2    +      -       -      +
    608A  CLR      3.9    23.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  ASN*     5.8     0.2    -      -       -      +
    155A  PHE*     3.0    26.0    +      -       +      +
    156A  ILE*     3.9     4.9    -      -       -      +
    158A  SER*     1.3    76.6    +      -       -      +
    160A  ALA*     1.3    63.4    +      -       -      +
    162A  ALA*     3.4     2.6    +      -       -      +
    163A  ASP*     3.0    36.1    +      -       -      +
    203A  SER*     3.6    40.2    -      -       -      +
    206A  SER*     4.0    10.5    +      -       -      -
    207A  LEU*     4.1    12.6    -      -       +      -
    393A  ASN*     3.8    35.4    -      -       +      +
    397A  TYR*     3.9    23.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    134A  ASN*     3.3    25.1    -      -       -      +
    137A  VAL*     4.2    16.4    -      -       +      -
    138A  LEU*     3.9    23.3    -      -       +      -
    156A  ILE      3.2    11.2    +      -       -      +
    157A  GLY*     3.1     9.7    +      -       -      +
    159A  LEU*     1.3    76.5    -      -       -      +
    161A  VAL*     1.3    59.2    +      -       -      +
    163A  ASP      3.4     0.2    +      -       -      -
    164A  LEU*     2.9    32.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    138A  LEU*     3.9    21.8    -      -       +      -
    157A  GLY      3.1    17.6    +      -       -      +
    158A  SER*     3.2     5.6    +      -       -      +
    160A  ALA*     1.3    74.6    -      -       -      +
    162A  ALA*     1.3    63.7    +      -       -      +
    164A  LEU*     3.9     4.4    -      -       -      +
    165A  LEU*     3.0    36.2    +      -       +      +
    241A  TRP*     3.9    10.3    -      -       +      -
    604A  OLA      4.0    31.4    -      -       +      -
    608A  CLR      3.8    35.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  SER      3.0    16.3    +      -       -      +
    159A  LEU*     3.8     5.4    -      -       -      +
    161A  VAL*     1.3    77.8    -      -       -      +
    163A  ASP*     1.3    57.5    +      -       -      +
    165A  LEU*     5.0     0.7    -      -       -      -
    166A  GLY*     3.0    26.2    +      -       -      -
    199A  SER*     3.6    28.2    -      -       -      +
    200A  PHE*     6.0     0.9    -      -       -      -
    202A  ALA*     4.2     2.0    -      -       +      +
    203A  SER*     3.8    21.3    -      -       -      +
    206A  SER*     5.1     0.4    -      -       -      +
    241A  TRP*     3.8    19.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  THR*     4.6     0.3    -      -       -      +
    134A  ASN*     3.7    24.2    -      -       -      +
    159A  LEU*     3.0    23.2    +      -       -      +
    162A  ALA*     1.3    73.8    -      -       -      +
    164A  LEU*     1.3    63.1    +      -       -      +
    166A  GLY*     5.1     0.2    -      -       -      -
    167A  SER*     2.9    32.0    +      -       -      +
    200A  PHE*     5.4     2.3    -      -       -      -
    203A  SER*     3.0    28.0    +      -       -      -
    390A  SER*     3.5    30.6    +      -       -      +
    393A  ASN*     3.6    29.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    131A  VAL*     3.6    46.4    -      -       +      +
    134A  ASN*     4.1     9.5    -      -       +      +
    135A  LEU*     4.5    20.9    -      -       +      +
    138A  LEU*     3.9    24.9    -      -       +      -
    160A  ALA      2.9    18.6    +      -       -      +
    161A  VAL*     3.9     4.0    -      -       -      +
    163A  ASP*     1.3    76.7    -      -       -      +
    165A  LEU*     1.3    68.5    +      -       +      +
    167A  SER*     3.1    15.1    +      -       -      -
    168A  VAL*     3.3    22.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  VAL*     3.0    31.8    +      -       +      +
    162A  ALA*     4.1     2.2    -      -       -      +
    164A  LEU*     1.3    83.3    -      -       +      +
    166A  GLY*     1.3    64.1    +      -       -      +
    168A  VAL*     3.3     4.9    +      -       +      +
    169A  ILE*     3.0    34.1    +      -       +      +
    199A  SER*     4.2    11.2    -      -       -      +
    241A  TRP*     4.8     6.7    -      -       +      -
    604A  OLA      5.9     1.8    -      -       +      -
    608A  CLR      3.8    51.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  ALA      3.0    14.5    +      -       -      -
    163A  ASP*     4.0     0.4    -      -       -      -
    165A  LEU*     1.3    76.3    -      -       -      +
    167A  SER*     1.3    56.3    +      -       -      +
    169A  ILE*     3.4     2.3    +      -       -      +
    170A  PHE*     2.8    34.0    +      -       -      +
    196A  VAL*     4.9     2.0    -      -       -      +
    199A  SER*     3.4    22.8    -      -       -      -
    200A  PHE*     3.8    19.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  GLY*     4.7     4.5    -      -       -      -
    130A  THR*     4.2    19.6    -      -       -      +
    131A  VAL*     3.7    16.8    -      -       -      +
    163A  ASP      2.9    21.0    +      -       -      -
    164A  LEU*     3.1     7.8    +      -       -      -
    166A  GLY*     1.3    75.7    -      -       -      +
    168A  VAL*     1.3    60.8    +      -       -      +
    170A  PHE*     4.4     0.2    -      -       -      -
    171A  VAL*     2.9    36.3    +      -       -      +
    200A  PHE*     4.4     2.9    -      -       -      -
    387A  LEU*     4.0    26.5    -      -       -      -
    390A  SER*     5.2     2.2    -      -       -      -
    605A  OLC      5.7     0.2    -      -       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    131A  VAL*     3.5    26.7    -      -       +      -
    164A  LEU*     3.3    22.4    +      -       +      +
    165A  LEU*     3.3     7.7    +      -       +      +
    167A  SER*     1.3    81.9    +      -       -      +
    169A  ILE*     1.3    68.4    +      -       +      +
    171A  VAL*     4.4     0.3    -      -       -      +
    172A  TYR*     3.2    26.2    +      -       +      +
    605A  OLC      4.6    21.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  LEU*     3.0    23.0    +      -       +      +
    166A  GLY*     4.0     2.5    -      -       -      +
    168A  VAL*     1.3    78.8    -      -       +      +
    170A  PHE*     1.3    64.0    +      -       -      +
    172A  TYR*     4.0     2.3    -      -       -      +
    173A  SER*     3.0    35.2    +      -       -      +
    192A  LYS*     3.9    14.6    -      -       +      +
    195A  GLY*     4.0    24.0    -      -       -      +
    196A  VAL*     3.6    22.0    -      -       +      +
    199A  SER*     4.4     5.2    -      -       -      +
    608A  CLR      4.6    13.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  SER*     5.0     0.9    -      -       -      -
    166A  GLY      2.8    23.8    +      -       -      +
    167A  SER*     3.9     2.7    -      -       -      +
    169A  ILE*     1.3    74.7    -      -       -      +
    171A  VAL*     1.3    62.7    +      -       -      +
    173A  SER*     3.6     1.0    -      -       -      -
    174A  PHE*     2.6    81.9    +      +       +      +
    196A  VAL*     3.8    12.9    -      -       +      +
    200A  PHE*     4.0    11.2    -      +       +      -
    383A  SER*     3.9    18.6    -      -       -      -
    384A  MET*     5.0     4.5    -      -       -      -
    386A  CYS*     6.0     0.9    -      -       +      -
    387A  LEU*     4.0    31.2    -      -       +      -
    602A  8D3      3.5    53.6    -      +       +      +
----------------------------------------------------------
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Residues in contact with VAL 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  SER*     3.7    17.5    -      -       -      +
    124A  LEU*     3.9    28.3    -      -       +      -
    127A  GLY*     4.0    11.4    -      -       -      -
    167A  SER      2.9    25.1    +      -       -      +
    168A  VAL      4.4     0.9    -      -       -      +
    170A  PHE*     1.3    77.6    -      -       +      +
    172A  TYR*     1.3    63.5    +      -       -      +
    174A  PHE*     4.3     2.2    -      -       -      -
    175A  ILE*     2.9    37.4    +      -       +      +
    387A  LEU*     3.7    33.4    -      -       +      -
    605A  OLC      4.2    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168A  VAL*     3.2    20.9    +      -       +      +
    169A  ILE*     4.0     2.7    -      -       -      +
    170A  PHE      3.2     0.8    -      -       -      -
    171A  VAL*     1.3    79.6    -      -       -      +
    173A  SER*     1.3    69.4    +      -       -      +
    175A  ILE*     3.9     1.4    -      -       -      +
    176A  ASP*     2.9    44.4    +      -       +      +
    182A  ARG*     6.0     0.2    +      -       -      -
    192A  LYS*     5.6     6.5    -      -       -      -
    605A  OLC      3.4    73.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with SER 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  ILE*     3.0    24.7    +      -       -      +
    170A  PHE      3.9     0.9    -      -       -      -
    172A  TYR*     1.3    80.3    -      -       -      +
    174A  PHE*     1.3    57.2    +      -       -      +
    176A  ASP*     3.4     6.6    +      -       -      +
    177A  PHE*     2.9    32.9    +      -       -      +
    192A  LYS*     3.6    31.4    -      -       -      +
    196A  VAL*     5.2     0.9    -      -       -      -
    602A  8D3      4.0    25.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  ILE*     3.6    30.7    -      -       +      -
    123A  SER*     4.0    11.9    -      -       -      +
    170A  PHE*     2.6    51.5    +      +       +      +
    171A  VAL*     3.9     3.6    -      -       -      +
    173A  SER*     1.3    70.9    -      -       -      +
    175A  ILE*     1.3    64.2    +      -       +      +
    177A  PHE*     3.4     1.7    +      -       -      -
    178A  HIS*     3.0    54.9    +      +       -      +
    380A  ALA*     3.5    28.3    -      -       +      -
    383A  SER*     4.0     4.7    -      -       -      -
    384A  MET*     4.2    10.1    -      -       -      -
    602A  8D3      3.6    40.3    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  ILE*     4.2     4.5    -      -       +      +
    120A  ALA*     3.6    38.6    -      -       +      +
    123A  SER*     4.0    16.2    -      -       -      +
    124A  LEU*     4.7    13.5    -      -       +      -
    171A  VAL*     2.9    34.5    +      -       +      +
    172A  TYR      4.0     1.8    -      -       -      +
    174A  PHE*     1.3    74.9    -      -       +      +
    176A  ASP*     1.3    58.6    +      -       -      +
    179A  VAL*     2.9    39.1    +      -       +      +
    180A  PHE*     3.4    16.9    -      -       +      -
    605A  OLC      3.6    24.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  TYR*     2.9    34.0    +      -       +      +
    173A  SER*     3.7     8.3    -      -       -      +
    175A  ILE*     1.3    77.8    -      -       -      +
    177A  PHE*     1.3    56.7    +      -       -      +
    180A  PHE*     3.1    19.6    -      -       -      +
    181A  HIS      3.1    21.7    +      -       -      -
    182A  ARG*     3.1    45.6    +      -       +      +
    192A  LYS*     4.2     9.7    +      -       -      +
    605A  OLC      3.0    34.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    105A  ILE*     3.9    15.0    -      -       +      -
    108A  PHE*     3.4    37.5    -      -       +      -
    109A  MET*     3.6    36.2    -      -       +      +
    173A  SER      2.9    17.5    +      -       -      +
    174A  PHE      4.1     1.8    -      -       -      +
    176A  ASP*     1.3    76.8    -      -       -      +
    178A  HIS*     1.3    74.3    +      +       -      +
    181A  HIS*     3.2    24.9    +      -       -      -
    182A  ARG*     3.9    18.8    -      -       +      +
    184A  ASP*     6.1     0.4    -      -       -      -
    189A  PHE*     4.5    18.2    -      +       +      -
    269A  PRO*     4.3     5.4    -      -       +      -
    602A  8D3      3.5    36.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with HIS 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    108A  PHE      3.6    23.1    -      -       -      -
    109A  MET*     4.0     1.7    -      -       -      -
    110A  VAL*     3.4    46.9    +      -       +      +
    116A  GLN*     3.6     5.4    -      -       +      +
    119A  ILE*     4.7    18.6    -      -       +      -
    174A  PHE*     3.0    60.2    +      +       -      +
    177A  PHE*     1.3    94.2    -      +       -      +
    179A  VAL*     1.3    62.6    +      -       +      +
    181A  HIS*     3.2    21.2    +      -       -      -
    380A  ALA*     4.1     9.8    -      -       +      +
    602A  8D3      4.6     9.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    116A  GLN*     3.6    47.9    -      -       +      +
    119A  ILE*     4.9     2.5    -      -       +      -
    120A  ALA*     4.4    15.3    -      -       +      +
    175A  ILE*     2.9    27.6    +      -       +      +
    178A  HIS*     1.3    83.5    -      -       +      +
    180A  PHE*     1.3    77.7    +      -       +      +
    181A  HIS*     3.6     8.3    +      -       -      -
----------------------------------------------------------
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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