Contacts of the helix formed by residues 166 - 192 (chain A) in PDB entry 3P9K


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 166 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132A  VAL*     4.1     6.1    -      -       -      +
    162A  TYR*     2.9    45.2    +      -       +      +
    163A  HIS*     3.4     4.6    +      -       -      +
    165A  THR*     1.3    80.7    -      -       -      +
    167A  PRO*     1.3    60.2    -      -       -      +
    168A  ARG*     3.1    17.1    +      -       -      +
    169A  PHE*     2.8    29.0    +      -       +      +
    170A  ASN*     2.8    24.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  HIS      4.9     0.7    -      -       -      +
    164A  GLY      5.5     2.9    -      -       -      +
    165A  THR*     3.6     8.1    -      -       -      +
    166A  ASP*     1.3    86.0    -      -       -      +
    168A  ARG*     1.3    62.4    +      -       -      +
    170A  ASN*     3.4    11.1    +      -       +      +
    171A  ARG*     3.1    22.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130A  ASP*     2.8    41.0    +      -       -      -
    131A  LYS*     5.4     3.6    -      -       -      +
    132A  VAL*     3.5    18.6    -      -       -      +
    166A  ASP*     3.1    11.6    +      -       -      +
    167A  PRO*     1.3    79.3    -      -       -      +
    169A  PHE*     1.3    69.8    +      -       -      +
    171A  ARG*     3.4     6.1    +      -       -      +
    172A  VAL*     3.2    34.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  MET*     4.3     2.5    -      -       +      -
    130A  ASP*     3.4    35.0    -      -       +      -
    132A  VAL*     3.8    19.5    -      -       +      -
    133A  LEU*     3.5    44.4    -      -       +      -
    151A  PHE*     5.8     1.1    -      +       -      -
    162A  TYR*     4.2     6.3    -      +       +      -
    163A  HIS*     3.5    37.7    -      +       -      -
    166A  ASP*     2.8    31.1    +      -       +      +
    168A  ARG*     1.3    75.7    -      -       -      +
    170A  ASN*     1.3    60.3    +      -       -      +
    172A  VAL*     3.4    16.1    -      -       +      +
    173A  PHE*     2.8    40.3    +      +       +      +
----------------------------------------------------------
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Residues in contact with ASN 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163A  HIS*     3.4    39.9    +      -       -      +
    166A  ASP      2.8    17.3    +      -       -      +
    167A  PRO*     3.4    11.3    +      -       +      +
    168A  ARG      3.3     0.2    -      -       -      -
    169A  PHE*     1.3    77.3    -      -       -      +
    171A  ARG*     1.3    58.2    +      -       -      +
    173A  PHE*     3.7     4.6    -      -       -      +
    174A  ASN*     3.0    46.4    +      -       -      +
    231A  HIS*     3.7    10.3    -      -       -      -
    232A  VAL*     5.2     1.2    -      -       -      +
    235A  GLU*     2.7    39.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167A  PRO      3.1    12.0    +      -       -      +
    168A  ARG*     3.7     9.4    -      -       -      +
    169A  PHE      3.1     0.2    -      -       -      -
    170A  ASN*     1.3    75.9    -      -       -      +
    172A  VAL*     1.3    62.1    +      -       -      +
    174A  ASN*     3.2     6.6    +      -       -      +
    175A  GLU*     2.7    70.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  ALA      4.6     2.8    -      -       -      +
    126A  LEU*     4.2    10.1    -      -       +      +
    127A  MET*     3.6    34.6    -      -       +      +
    130A  ASP*     4.3     3.6    -      -       -      +
    168A  ARG*     3.2    35.6    +      -       +      +
    169A  PHE*     3.1    20.6    +      -       +      +
    171A  ARG*     1.3    83.2    -      -       +      +
    173A  PHE*     1.3    63.5    +      -       -      +
    175A  GLU*     3.8     5.1    -      -       -      +
    176A  GLY*     3.0    20.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127A  MET*     3.7    21.6    -      -       -      +
    133A  LEU*     5.7     2.0    -      -       +      -
    160A  PHE*     4.1     8.1    -      +       -      -
    163A  HIS*     3.4    40.2    -      +       +      +
    169A  PHE*     2.8    34.6    +      +       +      +
    170A  ASN*     3.7     5.4    -      -       -      +
    172A  VAL*     1.3    74.1    -      -       -      +
    174A  ASN*     1.3    79.1    +      -       -      +
    176A  GLY*     3.0    12.5    +      -       -      -
    177A  MET*     3.1    38.8    +      -       +      +
    401A  SAH      4.0    28.0    -      -       -      -
    601A  CIY      3.8    31.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  ASN*     3.0    44.2    +      -       -      +
    171A  ARG*     3.8     5.5    -      -       -      +
    173A  PHE*     1.3    90.4    -      -       -      +
    175A  GLU*     1.3    61.2    +      -       +      +
    177A  MET*     3.3     6.4    +      -       -      +
    178A  LYS*     2.8    30.8    +      -       -      +
    207A  GLY*     5.4     2.8    -      -       -      -
    208A  VAL*     4.4    26.2    -      -       +      +
    232A  VAL*     4.6    18.1    -      -       -      +
    235A  GLU*     3.8    11.1    +      -       -      +
    401A  SAH      5.0     3.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  ALA*     4.1     6.5    -      -       +      -
    171A  ARG*     2.7    66.0    +      -       +      +
    172A  VAL*     3.8     5.2    -      -       -      +
    174A  ASN*     1.3    71.9    -      -       +      +
    176A  GLY*     1.3    66.4    +      -       -      +
    178A  LYS*     3.0    33.5    +      -       -      +
    179A  ASN*     2.9    48.0    +      -       -      +
    208A  VAL*     6.1     1.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123A  ALA*     3.8    26.2    -      -       -      +
    124A  LEU*     3.5    26.4    -      -       -      +
    127A  MET*     4.7     2.9    -      -       -      -
    172A  VAL      3.0    14.7    +      -       -      -
    173A  PHE      3.0     4.2    +      -       -      -
    175A  GLU*     1.3    76.9    -      -       -      +
    177A  MET*     1.3    60.1    +      -       -      +
    179A  ASN*     4.1     1.2    -      -       -      +
    180A  HIS*     3.4    15.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124A  LEU*     4.2     6.1    -      -       +      -
    127A  MET*     3.5    41.3    -      -       +      -
    173A  PHE*     3.1    37.4    +      -       +      +
    174A  ASN*     3.7     8.1    -      -       -      +
    175A  GLU      3.2     0.2    -      -       -      -
    176A  GLY*     1.3    75.6    -      -       -      +
    178A  LYS*     1.3    66.4    +      -       -      +
    180A  HIS*     3.3     4.4    +      -       -      +
    181A  SER*     2.9    27.0    +      -       -      -
    262A  LYS*     4.6     0.2    +      -       -      -
    263A  TRP*     3.8    15.5    -      -       +      -
    401A  SAH      3.5    27.9    -      -       +      +
    601A  CIY      3.7    36.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  ASN      2.8    21.2    +      -       -      +
    175A  GLU*     3.0    36.7    +      -       -      +
    177A  MET*     1.3    74.0    -      -       -      +
    179A  ASN*     1.3    66.6    +      -       -      +
    181A  SER*     3.2     6.4    +      -       -      -
    182A  ILE*     2.9    48.7    +      -       +      +
    208A  VAL*     3.8    24.9    -      -       +      +
    210A  ALA*     3.8    16.8    -      -       +      -
    237A  PRO*     6.3     2.6    -      -       +      +
    239A  PHE*     6.1     2.2    -      -       +      -
    401A  SAH      5.0     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118A  GLY      4.2     2.6    -      -       -      +
    119A  VAL*     3.2    22.7    -      -       -      +
    120A  SER      3.2    38.4    +      -       -      +
    123A  ALA*     3.7    19.0    -      -       +      +
    124A  LEU*     5.8     0.9    -      -       +      +
    175A  GLU*     2.9    46.8    +      -       -      +
    176A  GLY      4.1     1.8    -      -       -      +
    178A  LYS*     1.3    82.3    -      -       -      +
    180A  HIS*     1.3    65.8    +      -       -      +
    182A  ILE*     3.4     2.3    +      -       -      +
    183A  ILE*     3.3    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  MET*     3.9    24.4    -      -       +      -
    124A  LEU*     3.8    19.7    -      -       +      +
    176A  GLY      3.4    15.9    +      -       -      +
    177A  MET      3.3     4.2    +      -       -      +
    178A  LYS      3.3     0.6    -      -       -      -
    179A  ASN*     1.3    78.7    -      -       -      +
    181A  SER*     1.3    61.6    -      -       -      +
    183A  ILE*     3.1     4.7    +      -       -      +
    184A  ILE*     3.0    54.3    +      -       +      +
    262A  LYS*     2.8    30.9    +      -       -      -
    263A  TRP*     3.4    40.3    -      +       +      -
    293A  VAL*     6.1     0.4    -      -       +      -
    351A  ALA      5.6     1.6    +      -       -      -
    353A  ALA*     5.5     4.3    -      -       +      -
     21B  LEU*     4.1    11.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 181 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  MET      2.9    12.6    +      -       -      -
    178A  LYS*     3.5     6.7    -      -       -      -
    180A  HIS*     1.3    77.8    +      -       -      +
    182A  ILE*     1.3    57.5    +      -       -      +
    185A  THR*     2.7    37.6    +      -       -      -
    210A  ALA*     5.2     1.8    -      -       -      -
    211A  THR*     3.2    26.0    +      -       -      -
    262A  LYS*     3.2    17.2    +      -       -      +
    401A  SAH      2.4    34.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117A  ASP*     4.7    15.3    -      -       +      +
    119A  VAL*     3.9    35.0    -      -       +      -
    178A  LYS*     2.9    43.8    +      -       +      +
    179A  ASN      3.8     4.7    -      -       -      +
    181A  SER*     1.3    76.3    -      -       -      +
    183A  ILE*     1.3    62.0    +      -       -      +
    185A  THR*     4.3     3.6    -      -       -      -
    186A  LYS*     3.5    19.2    +      -       -      +
    210A  ALA*     4.1    20.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111A  PHE*     5.7    11.9    -      -       +      -
    115A  ASN*     5.1     4.3    -      -       -      +
    119A  VAL*     3.8    16.6    -      -       +      -
    120A  SER*     3.8    32.5    -      -       -      +
    121A  MET*     3.8    31.2    -      -       +      +
    179A  ASN      3.3    14.6    -      -       -      +
    180A  HIS      3.1     7.5    +      -       -      +
    182A  ILE*     1.3    77.4    -      -       -      +
    184A  ILE*     1.3    67.5    +      -       +      +
    186A  LYS*     3.5    17.9    +      -       -      +
    187A  LYS*     3.6    10.3    +      -       +      +
    350A  TYR*     5.7     6.7    -      -       +      -
     17B  CYS*     4.9     8.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121A  MET*     4.7     4.0    -      -       +      -
    180A  HIS*     3.0    45.6    +      -       +      +
    181A  SER      4.1     1.6    -      -       -      +
    183A  ILE*     1.3    83.1    -      -       +      +
    185A  THR*     1.3    62.0    +      -       -      +
    187A  LYS*     3.0     7.7    +      -       +      +
    188A  LEU*     2.8    28.7    +      -       +      +
    262A  LYS*     4.3     8.1    -      -       +      -
    293A  VAL*     4.3    16.6    -      -       +      -
    349A  ILE*     4.5     9.1    -      -       +      +
    350A  TYR*     4.3    23.6    -      -       +      +
    351A  ALA*     4.7    13.0    -      -       +      +
    353A  ALA*     4.0    20.6    -      -       +      -
     17B  CYS*     5.9     0.2    -      -       -      -
     21B  LEU*     5.8     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181A  SER*     2.7    30.1    +      -       -      -
    182A  ILE*     4.3     3.4    -      -       -      -
    184A  ILE*     1.3    73.7    -      -       -      +
    186A  LYS*     1.3    62.1    +      -       -      +
    188A  LEU*     3.4    11.5    -      -       +      +
    189A  LEU*     2.9    29.6    +      -       +      +
    211A  THR*     3.4    26.3    +      -       +      +
    214A  ALA*     3.6    31.6    -      -       +      -
    215A  ILE*     3.9    22.2    -      -       +      -
    262A  LYS*     5.3     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115A  ASN*     5.8     1.4    -      -       -      +
    116A  GLU*     3.5    23.2    +      -       -      -
    117A  ASP*     4.1    15.2    +      -       -      +
    182A  ILE      3.5    11.6    +      -       -      +
    183A  ILE*     3.5    12.7    +      -       -      +
    184A  ILE      3.2     0.2    -      -       -      -
    185A  THR*     1.3    78.4    -      -       -      +
    187A  LYS*     1.3    63.4    +      -       +      +
    189A  LEU*     3.4    12.8    +      -       -      +
    190A  GLU*     3.2    36.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 187 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  ILE*     3.6    10.9    +      -       +      +
    184A  ILE*     3.0     9.6    +      -       -      +
    186A  LYS*     1.3    79.3    -      -       +      +
    188A  LEU*     1.3    64.0    +      -       -      +
    190A  GLU*     3.1    29.4    +      -       -      +
    191A  LEU*     3.1    35.4    +      -       +      +
    349A  ILE*     4.0     5.2    -      -       +      -
    350A  TYR*     3.7    66.8    +      -       +      -
     10B  ALA*     5.6     6.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  ILE*     2.8    19.7    +      -       +      +
    185A  THR*     3.4    17.9    -      -       +      +
    187A  LYS*     1.3    74.9    -      -       -      +
    189A  LEU*     1.3    57.2    +      -       +      +
    192A  TYR*     2.8    51.0    +      -       +      +
    195A  PHE*     3.6    30.5    -      -       +      -
    211A  THR*     5.8     1.6    -      -       +      -
    215A  ILE*     4.7     9.6    -      -       +      -
    260A  LEU*     5.2     3.1    -      -       +      -
    291A  VAL*     6.0     0.7    -      -       +      -
    293A  VAL*     4.4    23.1    -      -       +      -
    349A  ILE*     3.7    37.7    -      -       +      +
    355A  ALA*     4.1    11.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  THR*     2.9    31.9    +      -       +      +
    186A  LYS*     3.8     8.5    -      -       -      +
    187A  LYS      3.3     0.4    -      -       -      -
    188A  LEU*     1.3    76.1    -      -       +      +
    190A  GLU*     1.3    60.3    +      -       +      +
    192A  TYR      4.2     9.5    -      -       -      +
    193A  HIS*     5.8     0.9    -      -       -      -
    195A  PHE*     4.4    10.3    -      -       +      -
    214A  ALA*     3.9    15.5    -      -       +      +
    215A  ILE*     4.1    19.3    -      -       +      -
    218A  HIS*     3.7    46.9    +      -       +      -
    219A  TYR*     3.9    31.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186A  LYS*     3.2    41.2    -      -       +      +
    187A  LYS*     3.1    38.8    +      -       -      +
    189A  LEU*     1.3    80.9    -      -       +      +
    191A  LEU*     1.3    69.8    +      -       +      +
    192A  TYR      5.3     0.2    -      -       -      -
    193A  HIS*     4.4    10.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  LYS*     3.1    28.7    +      -       +      +
    190A  GLU*     1.3    92.0    -      -       +      +
    192A  TYR*     1.3    59.4    +      -       -      +
    193A  HIS*     4.0    10.7    -      -       -      -
    347A  THR*     4.6    11.5    -      -       +      +
    348A  TYR      4.8     4.5    -      -       -      +
    349A  ILE*     3.1    43.3    -      -       +      +
    350A  TYR*     5.4     1.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  LEU*     2.8    42.2    +      -       +      +
    189A  LEU*     4.2     9.7    -      -       -      +
    190A  GLU      3.8     0.2    -      -       -      -
    191A  LEU*     1.3    74.9    -      -       -      +
    193A  HIS*     1.3    68.4    +      -       -      +
    194A  GLY*     3.4    28.8    -      -       -      -
    195A  PHE*     3.7    43.2    +      +       -      -
    219A  TYR*     4.5     6.6    +      -       -      -
    289A  LYS*     3.9     0.7    +      -       -      -
    291A  VAL*     3.3    20.4    -      -       +      +
    345A  LYS*     4.8     7.9    -      -       -      -
    347A  THR*     4.8    11.7    -      -       +      -
    349A  ILE*     4.2     5.6    -      -       +      -
    355A  ALA*     4.2    15.5    -      -       +      -
    357A  GLU*     2.4    49.5    +      -       +      +
----------------------------------------------------------
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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