Contacts of the helix formed by residues 162 - 192 (chain A) in PDB entry 4OQZ


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 PRO 162 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  ALA*     3.7     7.0    -      -       -      +
    100A  ARG*     3.8    20.9    -      -       +      +
    103A  ALA*     3.6    33.9    -      -       +      -
    113A  HIS*     4.8     0.9    -      -       +      +
    115A  THR*     2.9    32.9    +      -       -      +
    135A  SER*     3.1    14.6    +      -       -      +
    136A  GLY*     4.9     4.0    -      -       -      -
    137A  PRO*     6.4     0.4    -      -       +      -
    160A  GLU      3.5     9.0    -      -       -      +
    161A  ASP*     1.4    89.5    -      -       -      +
    163A  GLY*     1.3    56.6    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  PRO*     3.4    36.8    -      -       -      +
     99A  ALA*     4.4     0.9    -      -       -      -
    100A  ARG*     3.7     8.9    -      -       -      +
    161A  ASP*     3.1    13.4    +      -       -      -
    162A  PRO*     1.3    77.1    -      -       -      +
    164A  LEU*     1.3    58.1    +      -       -      +
    165A  ALA      3.6     0.2    -      -       -      -
    166A  ALA*     3.3     5.1    +      -       -      +
    167A  LEU*     2.8    27.3    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    135A  SER*     3.8     7.4    -      -       -      -
    158A  ARG*     3.8    30.5    -      -       +      +
    159A  GLY*     4.2     8.7    -      -       -      -
    161A  ASP*     3.0    39.3    +      -       +      +
    162A  PRO      3.3     0.2    -      -       -      -
    163A  GLY*     1.3    74.4    -      -       -      +
    165A  ALA*     1.3    56.9    +      -       -      +
    167A  LEU*     3.3    15.8    +      -       +      +
    168A  MET*     3.0    60.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115A  THR*     3.5    19.3    -      -       +      +
    117A  GLY*     4.2     5.1    -      -       -      +
    133A  PHE*     3.4    40.6    -      -       +      +
    134A  TYR      3.8     1.1    -      -       -      -
    135A  SER*     2.9    28.5    +      -       -      +
    158A  ARG*     4.9     2.7    -      -       -      +
    164A  LEU*     1.3    71.2    -      -       -      +
    166A  ALA*     1.3    56.6    +      -       -      +
    168A  MET*     3.5     4.1    +      -       -      +
    169A  TYR*     2.9    28.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     69A  TYR*     5.1     1.3    -      -       -      +
     94A  ASP      3.6    20.4    -      -       -      +
     95A  THR      3.9     2.2    -      -       -      +
     96A  PRO*     3.7    19.7    -      -       +      -
     99A  ALA*     4.2    11.9    -      -       +      -
    115A  THR*     4.1     8.6    -      -       +      +
    116A  GLY      5.9     1.3    -      -       -      -
    163A  GLY      3.3    11.3    +      -       -      +
    164A  LEU      3.3     0.4    -      -       -      -
    165A  ALA*     1.3    74.6    -      -       -      +
    167A  LEU*     1.4    57.9    +      -       -      +
    169A  TYR*     3.2     8.1    +      -       -      +
    170A  GLN*     2.9    32.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     96A  PRO*     3.7    19.0    -      -       +      +
    100A  ARG*     5.9     4.5    -      -       -      +
    163A  GLY      2.8    15.1    +      -       -      +
    164A  LEU*     3.3    19.5    +      -       +      +
    166A  ALA*     1.4    72.9    -      -       -      +
    168A  MET*     1.4    63.2    +      -       +      +
    170A  GLN*     2.9    10.8    +      -       +      +
    171A  LEU*     2.8    56.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    133A  PHE*     3.4    50.1    -      -       +      -
    158A  ARG*     4.2    17.0    -      -       +      +
    164A  LEU*     3.0    41.0    +      -       +      +
    165A  ALA      3.6     7.6    -      -       -      +
    166A  ALA      3.4     0.2    -      -       -      -
    167A  LEU*     1.4    79.5    -      -       +      +
    169A  TYR*     1.4    62.9    +      -       -      +
    171A  LEU*     3.3    25.1    +      -       +      +
    172A  ASN*     3.0    22.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  SER*     3.3    37.6    +      -       -      -
     94A  ASP      5.6     0.4    -      -       -      +
    117A  GLY*     3.7    26.7    -      -       -      -
    118A  VAL      3.4    27.2    +      -       -      -
    119A  LEU*     4.0    12.6    -      -       +      -
    133A  PHE*     4.2     4.2    -      -       -      -
    165A  ALA      2.9    16.4    +      -       -      +
    166A  ALA*     3.4    11.7    -      -       -      +
    168A  MET*     1.4    75.0    -      -       -      +
    170A  GLN*     1.4    74.7    +      -       -      +
    172A  ASN*     3.2    10.4    +      -       -      +
    173A  MET*     3.1    54.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     93A  SER*     4.7     1.4    +      -       -      -
     94A  ASP*     3.1    33.9    +      -       -      +
     95A  THR*     4.1     6.1    -      -       +      +
     96A  PRO*     4.5    13.9    -      -       +      -
    166A  ALA      2.9    19.6    +      -       -      +
    167A  LEU*     2.9    14.8    +      -       +      +
    169A  TYR*     1.4    82.6    -      -       -      +
    171A  LEU*     1.4    55.5    +      -       +      +
    173A  MET*     3.0    12.8    +      -       -      +
    174A  VAL*     2.8    42.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167A  LEU*     2.8    38.4    +      -       +      +
    168A  MET*     3.4    32.1    -      -       +      +
    170A  GLN*     1.4    75.8    -      -       +      +
    172A  ASN*     1.3    62.8    +      -       -      +
    174A  VAL*     3.4    26.4    -      -       +      +
    175A  VAL*     3.6    14.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  LEU*     3.7    40.5    -      -       +      +
    133A  PHE*     5.2     1.9    -      -       +      -
    168A  MET      3.0    12.5    +      -       -      +
    169A  TYR      3.2    11.4    +      -       -      +
    171A  LEU*     1.3    76.8    -      -       -      +
    173A  MET*     1.3    72.1    +      -       -      +
    175A  VAL*     3.2     8.4    +      -       -      +
    176A  PHE*     2.9    31.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119A  LEU*     5.6     0.4    -      -       -      -
    169A  TYR*     3.4    48.5    -      -       +      +
    170A  GLN*     3.0    17.1    +      -       -      +
    172A  ASN*     1.3    86.8    -      -       -      +
    174A  VAL*     1.4    62.7    +      -       -      +
    175A  VAL      3.1     2.0    -      -       -      -
    176A  PHE*     3.8    19.5    -      -       +      -
    177A  TRP*     3.2    78.0    +      -       +      +
    178A  PRO*     3.7     0.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  GLN*     2.8    27.8    +      -       +      +
    171A  LEU*     3.4    20.6    -      -       +      +
    172A  ASN      3.3     0.2    -      -       -      -
    173A  MET*     1.4    71.4    -      -       -      +
    175A  VAL*     1.3    64.5    +      -       +      +
    178A  PRO*     3.0    23.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  LEU      3.7    12.1    -      -       -      +
    172A  ASN*     3.2     9.5    +      -       -      +
    173A  MET      3.1     0.4    -      -       -      -
    174A  VAL*     1.3    87.1    -      -       +      +
    176A  PHE*     1.3    61.3    +      -       -      +
    177A  TRP      3.6     0.4    -      -       -      -
    178A  PRO*     3.4     2.5    -      -       -      +
    179A  ALA*     3.0    35.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  ASN*     2.9    25.8    +      -       -      +
    173A  MET*     3.5    25.5    +      -       +      +
    175A  VAL*     1.3    78.3    -      -       -      +
    177A  TRP*     1.3    90.2    +      +       -      +
    179A  ALA*     3.2     6.9    +      -       +      +
    180A  MET*     2.9    60.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with TRP 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  MET*     3.2    54.7    +      -       +      +
    176A  PHE*     1.3   100.9    -      +       -      +
    178A  PRO*     1.4    63.8    -      -       +      +
    180A  MET*     3.3     6.3    +      -       +      +
    181A  LEU*     2.9    28.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  MET      3.7     0.4    -      -       -      +
    174A  VAL*     3.0    31.9    -      -       -      +
    175A  VAL*     3.4     6.3    -      -       -      +
    177A  TRP*     1.4    90.1    -      -       +      +
    179A  ALA*     1.4    59.8    +      -       -      +
    181A  LEU*     3.6     8.8    -      -       +      +
    182A  SER*     2.8    31.4    +      -       -      -
    257A  PHE*     3.8    19.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    175A  VAL*     3.0    26.8    +      -       +      +
    176A  PHE*     3.5     7.0    -      -       +      +
    178A  PRO*     1.4    73.6    -      -       -      +
    180A  MET*     1.3    67.1    +      -       +      +
    182A  SER*     2.8    24.6    +      -       -      -
    183A  TYR*     3.1     7.1    +      -       -      +
    208A  PHE*     3.7    32.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176A  PHE*     2.9    54.4    +      -       +      +
    177A  TRP*     3.8     7.6    -      -       +      +
    179A  ALA*     1.3    80.3    -      -       -      +
    181A  LEU*     1.3    56.1    +      -       -      +
    183A  TYR*     3.2    18.6    +      -       +      +
    184A  TRP*     2.9    72.4    +      -       +      +
    208A  PHE*     6.0     3.8    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 181 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177A  TRP      2.9    18.4    +      -       -      +
    178A  PRO*     3.7     7.6    -      -       +      +
    180A  MET*     1.3    73.1    -      -       -      +
    182A  SER*     1.4    59.5    +      -       -      +
    184A  TRP*     3.1    26.8    +      -       +      +
    185A  GLN*     2.9    27.2    +      -       -      +
    257A  PHE*     3.7    36.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178A  PRO      2.8    17.4    +      -       -      -
    179A  ALA*     2.8    19.5    +      -       -      -
    181A  LEU*     1.4    67.9    -      -       -      +
    183A  TYR*     1.3    59.5    +      -       -      +
    185A  GLN*     3.3     4.3    +      -       -      +
    186A  ALA*     2.9    27.6    +      -       -      +
    208A  PHE*     3.9    13.7    -      -       -      -
    257A  PHE*     3.4    24.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    179A  ALA      3.1    12.2    +      -       -      +
    180A  MET*     3.2    22.0    +      -       +      +
    182A  SER*     1.3    75.1    +      -       -      +
    184A  TRP*     1.4    89.1    +      +       -      +
    186A  ALA*     3.1     5.1    +      -       +      -
    187A  VAL*     2.9    46.2    +      -       +      +
    197A  ALA*     2.9    34.7    +      -       +      +
    200A  ILE*     4.1    15.3    -      -       +      -
    201A  ALA*     4.1    11.9    -      -       +      +
    204A  VAL*     3.8    37.9    -      -       +      -
    208A  PHE*     5.1     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TRP 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    180A  MET*     2.9    49.0    +      -       +      +
    181A  LEU*     3.1    28.7    +      -       +      +
    183A  TYR*     1.4   105.8    -      +       -      +
    185A  GLN*     1.4    56.4    +      -       -      +
    187A  VAL*     3.5     9.0    +      -       +      +
    188A  ALA*     3.1    28.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181A  LEU*     2.9    13.7    +      -       +      +
    182A  SER*     3.4    10.3    -      -       -      +
    183A  TYR      3.2     0.2    -      -       -      -
    184A  TRP*     1.4    77.0    -      -       -      +
    186A  ALA*     1.3    55.5    +      -       -      +
    188A  ALA*     3.5     5.7    +      -       -      +
    189A  LEU*     3.1    27.0    +      -       -      +
    244A  VAL*     6.1     0.7    -      -       +      -
    248A  ASN*     3.0    28.0    +      -       -      +
    253A  VAL*     3.8     9.3    -      -       -      +
    254A  ASP*     2.8    29.8    +      -       -      +
    257A  PHE*     3.6    21.4    +      -       +      +
    258A  PRO*     3.5    30.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182A  SER      2.9    13.5    +      -       -      +
    183A  TYR*     3.4    16.2    -      -       +      +
    185A  GLN*     1.3    72.1    -      -       -      +
    187A  VAL*     1.3    60.6    +      -       -      +
    189A  LEU*     3.3     5.9    +      -       -      +
    190A  ALA*     3.0    32.6    +      -       -      +
    200A  ILE*     3.5    15.9    -      -       +      +
    204A  VAL*     4.6     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 187 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183A  TYR*     2.9    56.9    +      -       +      +
    184A  TRP*     3.9    10.1    -      -       +      +
    186A  ALA*     1.3    74.6    -      -       -      +
    188A  ALA*     1.4    56.6    +      -       -      +
    190A  ALA*     3.5     2.2    +      -       -      +
    191A  ASP*     3.0    31.3    +      -       +      +
    195A  LEU      4.8     1.2    -      -       -      +
    196A  THR      5.5     0.6    -      -       -      -
    197A  ALA*     3.8    26.2    -      -       +      +
    200A  ILE*     3.8     8.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184A  TRP      3.1    18.0    +      -       -      +
    185A  GLN*     3.8     7.9    -      -       -      +
    186A  ALA      3.3     0.2    -      -       -      -
    187A  VAL*     1.4    77.4    -      -       -      +
    189A  LEU*     1.4    61.2    +      -       -      +
    191A  ASP*     3.4    18.1    -      -       -      +
    192A  ALA*     3.6     4.3    +      -       -      +
    253A  VAL*     3.6    25.9    -      -       +      +
----------------------------------------------------------
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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  GLN      3.1    13.3    +      -       -      +
    186A  ALA*     3.3     5.1    +      -       -      +
    188A  ALA*     1.4    74.2    -      -       -      +
    190A  ALA*     1.3    63.6    +      -       -      +
    191A  ASP      3.3     0.7    +      -       -      -
    192A  ALA*     3.3     9.4    +      -       -      +
    193A  HIS*     3.0    28.3    +      -       +      +
    247A  THR*     3.5    45.8    -      -       +      +
    248A  ASN*     3.4    37.7    -      -       -      +
    251A  SER*     3.5    15.5    -      -       -      +
    253A  VAL*     3.9     6.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186A  ALA      3.0    17.3    +      -       -      +
    187A  VAL      3.9     2.2    -      -       -      +
    189A  LEU*     1.3    73.9    -      -       -      +
    191A  ASP*     1.4    61.9    +      -       -      +
    193A  HIS*     3.2    11.2    +      -       -      -
    194A  GLY      3.5     0.2    +      -       -      -
    195A  LEU*     2.9    54.2    +      -       +      +
    196A  THR      5.0     0.4    -      -       -      +
    200A  ILE*     3.9    25.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 191 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    187A  VAL*     3.0    20.8    +      -       +      +
    188A  ALA*     3.4    11.4    -      -       -      +
    189A  LEU      3.1     0.2    -      -       -      -
    190A  ALA*     1.4    71.5    -      -       -      +
    192A  ALA*     1.4    55.9    +      -       -      +
    193A  HIS      2.8    14.7    +      -       -      -
    194A  GLY*     3.1    13.7    +      -       -      -
    195A  LEU      3.6    10.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  ALA      3.6     2.0    +      -       -      +
    189A  LEU      3.3    10.8    +      -       -      +
    191A  ASP*     1.4    77.8    +      -       -      +
    193A  HIS*     1.4    64.6    +      -       -      +
    194A  GLY      3.8     0.4    -      -       -      -
    251A  SER*     3.8    35.2    -      -       -      +
    253A  VAL*     4.0    10.1    -      -       +      -
----------------------------------------------------------
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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