Contacts of the helix formed by residues 152 - 178 (chain A) in PDB entry 4KPD


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with TYR 152 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     68A  PHE*     5.8     0.3    -      -       -      -
     84A  ARG*     3.4    31.5    +      -       -      -
    147A  CYS*     4.1     9.2    -      -       +      -
    150A  GLN*     3.6    27.1    -      -       +      -
    151A  PRO*     1.3    84.0    -      -       +      +
    153A  TYR*     1.4    65.6    +      -       -      +
    154A  LEU      3.4     2.2    -      -       -      -
    155A  ASN*     3.3    14.3    +      -       +      +
    156A  LEU*     3.0    47.9    +      -       +      +
    215A  TYR*     3.5    28.7    -      -       +      +
    216A  MET*     3.4    52.3    -      -       +      +
    218A  GLY*     6.1     0.4    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 153 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  TYR      4.9     1.0    +      -       -      -
    143A  LEU*     3.3    31.4    -      -       +      -
    144A  LYS*     3.6    25.3    +      -       -      +
    147A  CYS*     3.2    32.8    -      -       +      +
    148A  ARG*     3.6    26.0    -      -       +      +
    150A  GLN      3.2    12.2    +      -       -      +
    151A  PRO      3.4     1.0    -      -       -      -
    152A  TYR*     1.4    82.7    -      -       -      +
    154A  LEU*     1.4    60.7    +      -       +      +
    156A  LEU*     3.3     4.7    +      -       +      +
    157A  ILE*     3.1    55.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 154 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  PRO      4.9     2.5    +      -       -      +
    152A  TYR      3.4     0.4    -      -       -      -
    153A  TYR*     1.4    79.2    -      -       +      +
    155A  ASN*     1.4    65.9    +      -       -      +
    157A  ILE*     3.3    19.3    +      -       +      -
    158A  GLU*     3.0    50.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASN 155 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  PRO      5.0     4.0    +      -       -      -
    152A  TYR*     3.3    19.8    +      -       -      +
    154A  LEU*     1.4    76.7    -      -       -      +
    156A  LEU*     1.4    57.5    +      -       -      +
    158A  GLU*     3.6    11.3    +      -       -      +
    159A  LEU*     2.9    31.0    +      -       -      +
    215A  TYR*     3.8    45.2    +      -       +      -
    220A  ASP*     4.2    15.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 156 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  VAL*     3.8    26.0    -      -       +      -
    143A  LEU*     4.1    18.8    -      -       +      -
    147A  CYS*     4.5     4.3    -      -       +      -
    152A  TYR*     3.0    44.0    +      -       +      +
    153A  TYR*     3.7     6.5    -      -       +      +
    155A  ASN*     1.4    72.9    -      -       -      +
    157A  ILE*     1.3    66.6    +      -       -      +
    159A  LEU*     3.3     5.1    +      -       +      +
    160A  PHE*     2.9    35.1    +      -       +      -
    212A  ALA*     3.8    41.7    -      -       +      +
    215A  TYR*     4.2    13.0    -      -       +      -
    216A  MET*     4.1     2.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 157 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    140A  TYR*     4.0    15.3    -      -       +      -
    143A  LEU*     4.3    17.0    -      -       +      -
    153A  TYR*     3.1    62.7    +      -       +      +
    154A  LEU*     3.3    20.8    +      -       +      +
    156A  LEU*     1.3    76.2    -      -       -      +
    158A  GLU*     1.4    57.9    +      -       +      +
    160A  PHE*     3.3     2.3    +      -       -      +
    161A  LEU*     2.9    52.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 158 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    154A  LEU*     3.0    44.5    +      -       +      +
    155A  ASN*     3.9    12.1    -      -       -      +
    157A  ILE*     1.4    76.0    -      -       +      +
    159A  LEU*     1.3    52.0    +      -       -      +
    161A  LEU*     3.8     9.8    -      -       +      +
    162A  GLN*     2.8    37.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 159 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    155A  ASN      2.9    19.1    +      -       -      +
    156A  LEU*     3.3     8.3    +      -       +      +
    158A  GLU*     1.3    75.5    -      -       -      +
    160A  PHE*     1.4    54.7    +      -       +      +
    162A  GLN*     4.2     4.0    -      -       +      +
    163A  SER*     2.7    46.8    +      -       -      +
    207A  TYR*     3.8    29.8    -      -       +      +
    208A  LEU*     3.6    18.6    -      -       +      -
    211A  ALA*     3.7    10.1    -      -       +      -
    212A  ALA*     3.5    38.4    -      -       +      +
    215A  TYR*     3.8    17.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 160 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     88A  VAL*     4.0    17.7    -      -       +      -
     91A  CYS*     3.7    38.1    -      -       +      -
     92A  VAL*     3.6    28.9    -      -       +      -
     95A  LEU*     4.4    11.2    -      -       +      +
    139A  ILE*     3.7    15.3    -      -       +      -
    140A  TYR*     3.4    21.3    -      -       +      +
    143A  LEU*     4.0    19.1    -      -       +      -
    156A  LEU*     2.9    33.0    +      -       +      +
    157A  ILE      3.9     2.5    -      -       -      +
    159A  LEU*     1.4    75.3    -      -       +      +
    161A  LEU*     1.4    55.7    +      -       -      +
    163A  SER*     3.9     2.3    -      -       -      -
    164A  SER*     2.7    34.0    +      -       -      -
    208A  LEU*     4.2    25.1    -      -       +      -
    212A  ALA*     4.8     4.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 161 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    136A  GLU*     5.9     2.0    -      -       -      +
    140A  TYR*     3.4    27.1    -      -       +      +
    157A  ILE*     2.9    39.8    +      -       +      +
    158A  GLU*     3.8    10.1    -      -       +      +
    159A  LEU      3.3     0.2    -      -       -      -
    160A  PHE*     1.4    73.0    -      -       -      +
    162A  GLN*     1.3    64.0    +      -       -      +
    164A  SER*     3.3     6.9    +      -       -      +
    165A  TYR*     3.1    21.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 162 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    158A  GLU      2.8    20.7    +      -       -      +
    159A  LEU*     4.2     5.6    -      -       +      +
    161A  LEU*     1.3    72.3    -      -       -      +
    163A  SER*     1.3    57.0    +      -       -      +
    165A  TYR*     3.2    25.2    +      -       -      +
    166A  GLN*     3.0    65.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 163 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  LEU*     4.6     2.2    -      -       -      -
    159A  LEU*     2.7    30.5    +      -       -      +
    160A  PHE      3.9     3.6    -      -       -      -
    161A  LEU      3.4     0.2    -      -       -      -
    162A  GLN*     1.3    75.6    -      -       -      +
    164A  SER*     1.4    53.3    +      -       -      +
    166A  GLN*     3.6    13.8    +      -       -      +
    167A  THR*     2.7    36.6    +      -       -      -
    203A  PHE*     4.8     2.6    +      -       -      +
    204A  PHE*     4.3    11.0    +      -       -      +
    207A  TYR*     5.3     2.4    -      -       -      -
    208A  LEU*     3.8    39.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 164 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     95A  LEU*     3.4    20.8    -      -       -      +
     99A  PHE*     3.7    16.6    -      -       -      -
    136A  GLU*     4.4    12.3    +      -       -      -
    140A  TYR*     4.0     5.4    +      -       -      -
    160A  PHE      2.7    21.3    +      -       -      -
    161A  LEU*     3.5     9.6    -      -       -      -
    163A  SER*     1.4    73.5    -      -       -      +
    165A  TYR*     1.4    59.3    +      -       -      +
    167A  THR*     3.3     2.4    +      -       -      -
    168A  GLU*     3.0    44.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 165 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    161A  LEU      3.1    13.1    +      -       -      +
    162A  GLN*     3.7    32.5    -      -       -      +
    164A  SER*     1.4    76.3    -      -       -      +
    166A  GLN*     1.3    60.4    +      -       +      +
    168A  GLU*     3.2    14.3    +      -       +      +
    169A  ILE*     2.9    60.9    +      -       +      +
    199A  TYR*     6.6     0.2    -      +       -      -
----------------------------------------------------------
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Residues in contact with GLN 166 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    162A  GLN*     3.0    52.2    +      -       -      +
    163A  SER*     3.6    12.9    +      -       -      +
    165A  TYR*     1.3    78.3    -      -       +      +
    167A  THR*     1.4    57.6    +      -       -      +
    169A  ILE*     3.4     2.4    +      -       -      +
    170A  GLY      3.0    22.3    +      -       -      -
    199A  TYR*     3.2    29.9    -      -       +      +
    203A  PHE*     3.4    61.2    -      -       +      +
    207A  TYR*     5.7     1.2    -      -       -      -
    229A  LYS*     5.4     4.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 167 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  PHE*     3.5    39.7    -      -       +      -
    163A  SER      2.7    23.8    +      -       -      -
    165A  TYR      3.3     0.2    -      -       -      -
    166A  GLN*     1.4    74.5    -      -       -      +
    168A  GLU*     1.3    53.3    +      -       -      +
    170A  GLY*     3.1     2.6    +      -       -      -
    171A  GLN*     2.7    39.4    +      -       +      +
    199A  TYR      3.3     9.8    +      -       -      -
    200A  LYS*     3.3    22.8    -      -       -      +
    204A  PHE*     3.5    28.2    +      -       +      +
    405A  RIS      4.1     6.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 168 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     98A  PHE*     3.7    28.9    -      -       +      -
     99A  PHE*     3.8    11.2    -      -       +      -
    136A  GLU*     4.5     3.1    -      -       -      +
    164A  SER*     3.0    30.5    +      -       -      +
    165A  TYR*     3.6    13.7    -      -       +      +
    167A  THR*     1.3    73.1    -      -       -      +
    169A  ILE*     1.3    59.3    +      -       +      +
    171A  GLN*     3.3     9.9    +      -       +      +
    172A  THR*     2.9    32.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 169 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    165A  TYR*     2.9    55.8    +      -       +      +
    166A  GLN*     3.7     4.7    -      -       -      +
    167A  THR      3.3     0.2    -      -       -      -
    168A  GLU*     1.3    72.1    -      -       -      +
    170A  GLY*     1.3    60.3    +      -       -      +
    172A  THR*     3.2    16.2    +      -       +      +
    173A  LEU*     3.0    33.5    +      -       +      +
    199A  TYR*     4.0    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 170 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    166A  GLN      3.0    11.1    +      -       -      -
    167A  THR      3.1     4.2    +      -       -      -
    169A  ILE*     1.3    75.9    -      -       -      +
    171A  GLN*     1.3    50.6    +      -       -      +
    173A  LEU*     3.1     8.5    +      -       -      +
    174A  ASP*     2.8    33.8    +      -       -      +
    196A  ILE*     4.0     4.6    -      -       -      +
    199A  TYR*     3.4    22.7    -      -       -      -
    200A  LYS*     3.5    16.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLN 171 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     99A  PHE*     4.8     8.4    +      -       +      -
    103A  ASP*     3.0    33.8    +      -       -      +
    106A  MET*     4.2    17.1    -      -       +      +
    167A  THR*     2.7    28.5    +      -       +      +
    168A  GLU*     3.6     9.9    -      -       +      +
    170A  GLY*     1.3    72.6    -      -       -      +
    172A  THR*     1.4    54.9    +      -       -      +
    174A  ASP*     3.3     6.4    +      -       -      +
    175A  LEU*     2.9    46.6    +      -       +      +
    200A  LYS*     3.8    15.3    -      -       -      +
    403A   MG      4.1     3.9    -      -       -      -
    405A  RIS      3.5    31.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 172 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    168A  GLU      2.9    16.2    +      -       -      -
    169A  ILE*     3.2    20.8    +      -       +      +
    171A  GLN*     1.4    73.5    -      -       -      +
    173A  LEU*     1.4    57.4    +      -       +      +
    175A  LEU*     3.3     8.5    +      -       -      +
    176A  LEU*     2.9    54.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 173 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    169A  ILE*     3.0    18.2    +      -       +      +
    170A  GLY*     3.1    11.2    +      -       -      +
    172A  THR*     1.4    74.1    -      -       +      +
    174A  ASP*     1.3    62.0    +      -       -      +
    176A  LEU*     3.5    12.1    +      -       +      +
    177A  THR*     2.6    33.2    +      -       -      -
    192A  ARG*     4.3    27.1    -      -       -      +
    195A  SER*     3.9    20.0    -      -       -      +
    196A  ILE*     3.9    34.8    -      -       +      +
    199A  TYR*     5.2     6.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASP 174 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170A  GLY      2.8    13.8    +      -       -      +
    171A  GLN*     3.5    14.2    -      -       -      +
    173A  LEU*     1.3    75.3    -      -       -      +
    175A  LEU*     1.3    69.5    +      -       -      +
    177A  THR*     3.6     2.3    +      -       -      -
    178A  ALA*     3.3    24.1    +      -       -      +
    196A  ILE*     3.8    20.5    -      -       +      +
    200A  LYS*     2.9    32.6    +      -       +      +
    266A  LYS*     3.4    33.0    +      -       -      +
    267A  CYS      5.7     0.7    +      -       -      -
    403A   MG      3.9    10.7    -      -       -      -
    405A  RIS      4.4     0.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 175 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    106A  MET*     3.8    43.7    -      -       +      +
    107A  ASP*     4.2    15.5    -      -       -      +
    171A  GLN*     2.9    31.3    +      -       +      +
    172A  THR*     3.9     6.3    -      -       -      +
    174A  ASP*     1.3    86.8    -      -       -      +
    176A  LEU*     1.4    62.2    +      -       -      +
    178A  ALA*     3.3    22.6    +      -       +      +
    179A  PRO*     3.9     2.9    -      -       -      +
    266A  LYS*     4.8     4.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 176 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    172A  THR*     2.9    40.0    +      -       +      +
    173A  LEU*     4.0    14.4    -      -       +      +
    174A  ASP      3.5     0.2    -      -       -      -
    175A  LEU*     1.4    77.0    -      -       +      +
    177A  THR*     1.3    61.0    +      -       -      +
    179A  PRO*     3.6    10.7    -      -       -      +
    187A  ARG*     3.3    20.3    +      -       -      +
    192A  ARG*     5.2     4.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with THR 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    173A  LEU      2.6    24.0    +      -       -      -
    174A  ASP      4.1     3.6    -      -       -      -
    176A  LEU*     1.3    74.3    -      -       -      +
    178A  ALA*     1.3    57.2    +      -       -      +
    179A  PRO*     3.3     7.8    -      -       -      +
    184A  ASP*     2.8    29.9    -      -       -      +
    187A  ARG*     4.0    10.1    -      -       +      +
    188A  PHE*     3.3    21.3    -      -       +      -
    192A  ARG*     3.0    39.0    +      -       +      -
    196A  ILE*     3.8     6.2    -      -       -      +
    267A  CYS*     3.8    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  ASP      3.3    16.3    +      -       -      +
    175A  LEU*     3.3    12.0    +      -       -      +
    176A  LEU      3.2     0.4    -      -       -      -
    177A  THR*     1.3    79.5    -      -       -      +
    179A  PRO*     1.4    64.6    -      -       -      +
    180A  GLN*     3.4     2.6    +      -       -      +
    264A  ASP      3.5    17.0    -      -       -      +
    265A  ASN*     3.2    22.0    -      -       -      +
    266A  LYS*     3.5    23.0    -      -       +      -
    267A  CYS      4.9     0.4    -      -       -      +
----------------------------------------------------------
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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