Contacts of the helix formed by residues 155 - 184 (chain C) in PDB entry 3AG2


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 155 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    150C  SER*     2.9    21.5    +      -       -      +
    151C  LEU*     4.5     1.9    +      -       -      +
    153C  GLU*     4.6     7.6    -      -       +      +
    154C  GLY*     1.3    72.3    -      -       -      +
    156C  ARG*     1.3    64.4    +      -       -      +
    157C  LYS*     3.4     7.1    +      -       -      +
    158C  HIS*     2.5    49.5    +      -       -      +
    159C  MET*     3.1    23.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 156 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154C  GLY      3.5     6.3    +      -       -      +
    155C  ASP*     1.3    72.9    +      -       -      +
    157C  LYS*     1.3    67.1    +      -       +      +
    159C  MET*     3.3     2.4    +      -       -      +
    160C  LEU*     3.0    37.9    +      -       +      +
    222C  GLN*     2.9    44.1    +      -       -      +
    223C  LEU*     2.8    38.6    +      -       -      +
    225C  PHE*     3.3    45.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 157 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155C  ASP*     3.4     4.8    +      -       -      +
    156C  ARG*     1.3    83.3    -      -       +      +
    158C  HIS*     1.3    85.7    +      -       +      +
    160C  LEU*     3.4     7.9    +      -       -      +
    161C  GLN*     3.0    28.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 158 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146C  TRP*     4.0    16.9    -      +       +      +
    150C  SER*     3.6    16.2    -      -       -      +
    155C  ASP*     2.5    39.2    +      -       -      +
    157C  LYS*     1.3   101.0    +      -       -      +
    159C  MET*     1.3    61.5    +      -       -      +
    161C  GLN*     3.3    24.8    -      -       -      +
    162C  ALA*     2.9    32.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 159 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147C  ALA*     3.6    21.2    -      -       -      +
    150C  SER*     3.5    11.1    -      -       -      -
    151C  LEU*     3.6    26.5    -      -       +      +
    155C  ASP      3.1    20.7    +      -       -      +
    156C  ARG      3.5     4.7    -      -       -      +
    157C  LYS      3.3     0.2    -      -       -      -
    158C  HIS*     1.3    77.0    -      -       -      +
    160C  LEU*     1.3    58.7    +      -       -      +
    162C  ALA*     3.8     1.2    -      -       -      +
    163C  LEU*     2.8    49.6    +      -       +      +
    222C  GLN*     3.7    40.6    -      -       +      +
    227C  PHE*     4.2     5.6    -      -       +      -
    235C  PHE*     3.7    30.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 160 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    156C  ARG*     3.0    45.7    +      -       +      +
    157C  LYS*     3.7     7.0    -      -       -      +
    159C  MET*     1.3    77.9    -      -       -      +
    161C  GLN*     1.3    58.2    +      -       -      +
    163C  LEU*     4.5     0.4    -      -       -      -
    164C  PHE*     2.9    32.1    +      -       -      +
    219C  PHE*     3.4    38.6    -      -       +      +
    222C  GLN*     3.6    24.7    -      -       +      -
    223C  LEU*     3.8    29.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 161 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    146C  TRP*     3.7    17.7    -      -       +      -
    157C  LYS*     3.0    18.8    +      -       +      +
    158C  HIS*     3.3    28.8    -      -       -      +
    159C  MET      3.3     0.2    -      -       -      -
    160C  LEU*     1.3    76.2    -      -       -      +
    162C  ALA*     1.3    63.7    +      -       -      +
    164C  PHE*     3.3     7.8    +      -       +      +
    165C  ILE*     3.0    40.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 162 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143C  SER*     3.5     4.3    -      -       -      +
    146C  TRP*     3.4    38.8    -      -       +      -
    147C  ALA*     3.5    25.6    -      -       -      +
    158C  HIS      2.9    21.2    +      -       -      +
    161C  GLN*     1.3    72.7    -      -       -      +
    163C  LEU*     1.3    58.5    +      -       -      +
    165C  ILE*     3.3     4.9    +      -       -      +
    166C  THR*     2.9    31.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 163 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144C  ILE*     4.9     1.8    -      -       +      -
    147C  ALA*     3.9     5.8    -      -       +      +
    159C  MET*     2.8    50.7    +      -       +      +
    160C  LEU      4.0     2.5    -      -       -      +
    162C  ALA*     1.3    72.3    -      -       -      +
    164C  PHE*     1.3    57.5    +      -       -      +
    166C  THR*     3.2    11.0    +      -       -      -
    167C  ILE*     3.0    37.1    +      -       +      +
    215C  LEU*     3.9    38.1    -      -       +      +
    218C  CYS*     4.0     7.4    -      -       +      -
    219C  PHE*     3.6    41.7    -      -       +      +
    222C  GLN*     5.0     0.4    -      -       +      -
    235C  PHE*     4.4    11.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 164 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    160C  LEU      2.9    19.0    +      -       -      +
    161C  GLN*     3.6     7.4    -      -       +      +
    163C  LEU*     1.3    73.9    -      -       -      +
    165C  ILE*     1.3    69.3    +      -       +      +
    167C  ILE*     3.4    10.1    +      -       +      +
    168C  THR*     2.9    53.1    +      -       +      -
    219C  PHE*     3.9    23.9    -      +       +      -
----------------------------------------------------------
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Residues in contact with ILE 165 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    143C  SER*     3.9    13.7    -      -       -      -
    146C  TRP*     3.8    24.2    -      -       +      -
    161C  GLN*     3.0    33.8    +      -       +      +
    162C  ALA      3.3     6.7    +      -       -      +
    164C  PHE*     1.3    82.2    -      -       +      +
    166C  THR*     1.3    65.3    +      -       -      +
    168C  THR*     3.3     6.4    +      -       -      -
    169C  LEU*     3.0    42.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with THR 166 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140C  SER*     3.6    23.5    -      -       -      +
    143C  SER*     2.9    16.4    +      -       -      -
    144C  ILE*     3.2    27.2    +      -       +      +
    162C  ALA      2.9    19.2    +      -       -      -
    163C  LEU*     3.4    12.4    -      -       -      -
    165C  ILE*     1.3    76.7    -      -       -      +
    167C  ILE*     1.3    62.3    +      -       -      +
    169C  LEU*     3.3     4.0    +      -       -      +
    170C  GLY*     3.0    18.2    +      -       -      -
    215C  LEU*     3.6    24.0    -      -       +      -
    242C  TRP*     3.9    12.2    -      -       -      +
----------------------------------------------------------
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Residues in contact with ILE 167 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163C  LEU*     3.0    22.4    +      -       +      +
    164C  PHE*     3.8     9.9    -      -       +      +
    165C  ILE      3.3     0.2    -      -       -      -
    166C  THR*     1.3    75.1    -      -       -      +
    168C  THR*     1.3    60.0    +      -       -      +
    170C  GLY*     3.0     3.3    +      -       -      +
    171C  VAL*     2.8    39.2    +      -       +      +
    212C  SER*     4.7     6.9    +      -       -      +
    215C  LEU*     3.7    49.4    -      -       +      +
    216C  ILE*     3.7    28.7    -      -       +      -
    219C  PHE*     3.9    22.7    -      -       +      -
    242C  TRP*     6.2     0.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with THR 168 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    164C  PHE*     2.9    46.3    +      -       +      -
    165C  ILE*     3.6     7.6    -      -       -      +
    167C  ILE*     1.3    77.1    -      -       -      +
    169C  LEU*     1.3    62.6    +      -       +      +
    171C  VAL*     3.3     8.0    +      -       -      +
    172C  TYR*     2.8    30.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 169 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136C  VAL*     3.2    38.5    -      -       +      +
    137C  LEU*     5.5     0.2    -      -       -      -
    139C  ALA*     4.1    11.9    -      -       +      -
    140C  SER*     3.7    37.9    -      -       -      +
    143C  SER*     4.1     2.2    -      -       -      +
    165C  ILE*     3.0    39.3    +      -       +      +
    166C  THR      3.6     4.3    -      -       -      +
    168C  THR*     1.3    80.9    -      -       +      +
    170C  GLY*     1.3    61.9    +      -       -      +
    172C  TYR*     3.1    10.3    +      -       +      -
    173C  PHE*     2.9    20.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    137C  LEU*     5.0     0.4    -      -       -      -
    166C  THR      3.0     9.4    +      -       -      -
    167C  ILE*     3.0     7.2    +      -       -      -
    169C  LEU*     1.3    75.3    -      -       -      +
    171C  VAL*     1.3    61.4    +      -       -      +
    173C  PHE*     3.3     8.2    +      -       -      +
    174C  THR*     3.1    25.3    +      -       -      -
    208C  VAL*     3.9     1.9    -      -       -      +
    212C  SER*     3.9     9.9    -      -       -      -
    242C  TRP*     3.7    32.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  ILE*     2.8    31.2    +      -       +      +
    168C  THR*     3.6     7.4    -      -       -      +
    170C  GLY*     1.3    75.0    -      -       -      +
    172C  TYR*     1.3    64.7    +      -       -      +
    174C  THR*     3.2     7.8    +      -       -      -
    175C  LEU*     2.9    41.2    +      -       +      +
    212C  SER*     5.2     7.9    -      -       -      +
    216C  ILE*     5.6     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132C  LEU*     3.7    22.1    -      -       +      +
    136C  VAL*     3.6    31.2    -      -       +      -
    168C  THR*     2.8    23.1    +      -       +      +
    169C  LEU*     3.1    15.5    +      -       +      +
    171C  VAL*     1.3    74.4    -      -       -      +
    173C  PHE*     1.3    55.6    +      -       -      +
    175C  LEU*     3.3    11.5    +      -       +      +
    176C  LEU*     2.8    59.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 173 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  ASN*     3.5    43.1    -      -       +      +
    136C  VAL*     4.0     9.8    -      -       +      +
    137C  LEU*     3.6    33.9    -      -       +      -
    169C  LEU      2.9    13.3    +      -       -      +
    170C  GLY      3.5     7.4    -      -       -      +
    171C  VAL      3.3     0.2    -      -       -      -
    172C  TYR*     1.3    76.6    -      -       -      +
    174C  THR*     1.3    57.1    +      -       -      +
    176C  LEU*     3.3     3.5    +      -       -      +
    177C  GLN*     2.8    50.5    +      -       +      +
    204C  HIS*     3.7    21.3    -      +       -      -
    205C  GLY*     5.0     5.4    -      -       -      -
    208C  VAL*     3.8    31.6    -      -       +      -
    249C  TRP*     3.7    22.9    -      +       -      -
----------------------------------------------------------
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Residues in contact with THR 174 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170C  GLY      3.1    13.7    +      -       -      -
    171C  VAL*     3.2    12.0    +      -       -      -
    173C  PHE*     1.3    77.5    -      -       -      +
    175C  LEU*     1.3    65.9    +      -       +      +
    177C  GLN*     3.3     4.8    +      -       -      +
    178C  ALA*     2.9    30.2    +      -       +      +
    205C  GLY      5.2     0.8    +      -       -      +
    208C  VAL*     3.5    18.4    -      -       -      +
    209C  ILE*     4.1    29.5    -      -       +      +
    212C  SER*     5.1     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 175 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171C  VAL*     2.9    36.2    +      -       +      +
    172C  TYR*     3.6    11.4    -      -       +      +
    174C  THR*     1.3    79.2    -      -       +      +
    176C  LEU*     1.3    65.8    +      -       -      +
    178C  ALA*     3.3     8.3    +      -       +      +
    179C  SER*     2.9    24.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 176 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    129C  VAL*     4.2    16.1    -      -       +      +
    132C  LEU*     3.8    35.4    -      -       +      -
    133C  ASN*     3.3    26.5    -      -       -      +
    136C  VAL*     4.5     4.3    -      -       +      -
    172C  TYR*     2.8    59.7    +      -       +      +
    173C  PHE*     3.6     1.8    -      -       -      +
    175C  LEU*     1.3    72.0    -      -       -      +
    177C  GLN*     1.3    58.5    +      -       -      +
    179C  SER*     3.2     7.3    +      -       -      -
    180C  GLU*     2.8    33.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 177 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133C  ASN*     3.2    20.0    +      -       -      +
    173C  PHE*     2.8    34.4    +      -       +      +
    174C  THR*     3.7     4.9    -      -       -      +
    175C  LEU      3.2     0.2    -      -       -      -
    176C  LEU*     1.3    76.9    -      -       -      +
    178C  ALA*     1.3    59.7    +      -       -      +
    180C  GLU*     3.2    13.9    +      -       -      +
    181C  TYR*     2.9    54.8    +      -       +      +
    201C  THR*     4.2    15.9    +      -       -      +
    204C  HIS*     5.4     0.8    +      -       -      -
    205C  GLY*     5.8     4.7    -      -       -      -
    249C  TRP*     3.4    21.0    -      -       -      -
    257C  TYR*     3.2    25.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 178 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174C  THR*     2.9    18.8    +      -       +      +
    175C  LEU*     3.7    10.5    -      -       +      +
    177C  GLN*     1.3    77.8    -      -       -      +
    179C  SER*     1.3    62.7    +      -       -      +
    181C  TYR*     3.3    10.8    +      -       -      +
    182C  TYR*     3.1    22.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 179 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175C  LEU      2.9    17.6    +      -       -      -
    176C  LEU*     3.6     7.6    -      -       -      -
    178C  ALA*     1.3    77.9    -      -       -      +
    180C  GLU*     1.3    62.0    +      -       -      +
    182C  TYR*     3.2     6.5    +      -       -      +
    183C  GLU*     3.0    34.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 180 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  LEU*     3.3    38.9    -      -       +      +
    129C  VAL*     3.4    38.8    -      -       +      +
    130C  PRO*     3.4    20.9    -      -       -      +
    133C  ASN*     4.7     0.2    +      -       -      -
    176C  LEU      2.8    22.9    +      -       -      +
    177C  GLN*     3.6    20.0    -      -       -      +
    179C  SER*     1.3    73.4    -      -       -      +
    181C  TYR*     1.3    61.2    +      -       +      +
    183C  GLU*     3.7     6.8    -      -       -      +
    184C  ALA*     2.8    32.8    +      -       -      +
    197C  PHE*     6.4     0.4    -      -       +      -
    257C  TYR*     4.5     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 181 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177C  GLN*     2.9    37.2    +      -       +      +
    178C  ALA*     3.5    13.5    -      -       -      +
    179C  SER      3.2     0.2    -      -       -      -
    180C  GLU*     1.3    81.0    -      -       +      +
    182C  TYR*     1.3    62.4    +      -       -      +
    184C  ALA*     3.5    13.0    +      -       -      +
    186C  PHE      5.3     0.3    -      -       -      +
    197C  PHE*     4.2     7.6    -      +       -      -
    198C  PHE*     3.7    39.7    +      +       +      -
    201C  THR*     2.6    31.5    +      -       -      -
    202C  GLY*     3.1    26.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 182 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178C  ALA      3.1    12.5    +      -       -      +
    179C  SER*     3.2     9.6    +      -       -      +
    181C  TYR*     1.3    78.8    -      -       -      +
    183C  GLU*     1.3    78.7    +      -       -      +
    184C  ALA      3.6     4.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 183 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  LEU*     5.5     2.0    -      -       +      +
    179C  SER*     3.0    31.3    +      -       -      +
    180C  GLU*     4.0     7.2    -      -       -      +
    182C  TYR*     1.3    94.4    -      -       +      +
    184C  ALA*     1.3    67.6    +      -       -      +
    185C  PRO*     3.2     7.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 184 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  LEU*     4.3    10.3    -      -       +      -
    180C  GLU      2.8    18.1    +      -       -      +
    181C  TYR      3.8     9.1    -      -       -      +
    182C  TYR      3.4     6.1    -      -       -      +
    183C  GLU*     1.3    77.9    -      -       -      +
    185C  PRO*     1.3    69.8    -      -       +      +
    186C  PHE*     3.4    31.0    +      -       +      +
    187C  THR*     5.4     1.2    -      -       -      +
    197C  PHE*     5.7     0.7    -      -       +      -
    198C  PHE*     4.1    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
------------------------------------------------------------
  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