Contacts of the helix formed by residues 176 - 200 (chain A) in PDB entry 1TE6


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 SER 176 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  ALA*     3.3     4.0    -      -       -      +
    175A  GLU*     1.3    81.7    -      -       -      +
    177A  PHE*     1.3    60.0    +      -       -      +
    178A  ARG*     3.5     8.9    +      -       -      +
    179A  ASP*     3.2    20.2    +      -       -      +
    180A  ALA*     2.8    26.7    +      -       -      +
    413A  GLU*     3.4    16.7    +      -       -      -
    422A  PHE*     3.8    16.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 177 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144A  LEU*     4.0    22.7    -      -       +      -
    145A  PRO*     3.1    30.5    -      -       +      -
    147A  PRO*     3.7    20.4    -      -       +      -
    176A  SER*     1.3    69.9    -      -       -      +
    178A  ARG*     1.3    64.1    +      -       -      +
    180A  ALA*     2.9     4.2    +      -       -      +
    181A  MET*     2.9    52.6    +      -       +      +
    406A  TYR*     3.6    15.0    -      +       -      -
    409A  LEU*     3.3    48.2    -      -       +      -
    410A  MET*     3.8    15.3    -      -       +      -
    413A  GLU*     2.7    25.8    +      -       +      +
    422A  PHE*     3.7     7.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 178 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    176A  SER*     3.8     6.6    +      -       -      +
    177A  PHE*     1.3    75.1    -      -       -      +
    179A  ASP*     1.3    62.9    +      -       -      +
    181A  MET*     3.3    13.2    +      -       -      +
    182A  ARG*     3.3    11.3    +      -       -      +
    410A  MET*     3.1    57.6    +      -       -      +
    413A  GLU*     2.9    34.3    +      -       -      +
    414A  GLU*     3.2    41.3    +      -       -      +
     56B  TYR*     4.6     1.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with ASP 179 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174A  ALA*     3.6     7.0    -      -       -      -
    175A  GLU*     2.9    36.1    +      -       +      +
    176A  SER*     3.2    25.3    +      -       -      +
    177A  PHE      3.1     0.6    -      -       -      -
    178A  ARG*     1.3    77.0    -      -       -      +
    180A  ALA*     1.3    66.4    +      -       -      +
    182A  ARG*     3.0    28.0    +      -       -      +
    183A  LEU*     3.1    29.1    +      -       -      +
    238A  LYS*     5.8     1.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 180 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147A  PRO*     3.8    30.7    -      -       +      -
    149A  PHE*     3.8     3.6    -      -       -      -
    171A  PRO*     3.5    15.6    -      -       +      +
    174A  ALA*     3.6    17.2    -      -       +      +
    176A  SER      2.8    14.9    +      -       -      +
    177A  PHE*     2.9    10.1    +      -       -      +
    179A  ASP*     1.3    76.1    -      -       -      +
    181A  MET*     1.3    58.0    +      -       -      +
    183A  LEU      3.5     0.2    +      -       -      -
    184A  GLY*     3.0    24.9    +      -       -      -
    422A  PHE*     3.9     7.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 181 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  PHE*     3.5    26.9    -      -       +      -
    177A  PHE*     2.9    39.5    +      -       +      +
    178A  ARG      3.4     8.3    -      -       -      +
    180A  ALA*     1.3    77.7    -      -       -      +
    182A  ARG*     1.3    56.5    +      -       -      +
    184A  GLY*     3.9     0.3    -      -       -      -
    185A  ALA*     2.9    31.9    +      -       -      +
    397A  PRO*     4.8     2.0    -      -       +      -
    403A  LEU*     4.6     2.0    -      -       +      -
    406A  TYR*     3.4    39.7    -      -       +      -
    410A  MET*     3.9    22.9    -      -       +      -
     11B  LEU*     3.5    28.3    -      -       +      -
     56B  TYR*     3.6     9.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 182 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    178A  ARG      3.3     7.2    +      -       -      +
    179A  ASP*     3.0    25.2    +      -       -      +
    181A  MET*     1.3    77.8    -      -       -      +
    183A  LEU*     1.3    63.3    +      -       +      +
    185A  ALA*     3.8     0.9    -      -       -      +
    186A  GLU*     2.8    51.2    +      -       -      +
    235A  TYR*     3.8    12.5    +      -       -      -
     52B  ASP*     5.6     0.2    +      -       -      -
     54B  GLN*     2.8    31.5    +      -       -      +
     55B  ARG*     3.3    38.9    -      -       -      +
     56B  TYR*     3.3    28.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with LEU 183 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171A  PRO*     4.2     7.4    -      -       +      -
    174A  ALA*     4.3    15.9    -      -       +      -
    179A  ASP*     3.1    37.1    +      -       -      +
    180A  ALA      4.0     2.9    -      -       -      +
    182A  ARG*     1.3    80.3    -      -       +      +
    184A  GLY*     1.3    64.5    +      -       -      +
    186A  GLU*     3.8     0.3    -      -       -      +
    187A  VAL*     2.9    31.7    +      -       -      +
    235A  TYR*     3.3    50.7    -      -       +      +
    238A  LYS*     4.5    12.3    -      -       +      +
    239A  ILE*     3.4    33.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 184 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  PHE*     3.7    26.5    -      -       -      -
    151A  VAL*     5.3     0.7    -      -       -      +
    169A  ILE*     3.7    17.3    -      -       -      +
    171A  PRO*     4.2     1.0    -      -       -      +
    180A  ALA      3.0    11.7    +      -       -      -
    181A  MET      3.9     0.2    -      -       -      -
    183A  LEU*     1.3    78.4    -      -       -      +
    185A  ALA*     1.3    56.0    +      -       -      +
    187A  VAL*     3.4     2.6    +      -       -      +
    188A  TYR*     3.0    28.9    +      -       -      +
    397A  PRO*     4.2     7.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 185 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149A  PHE*     5.3     0.2    -      -       -      -
    181A  MET      2.9    18.6    +      -       -      +
    182A  ARG      3.9     0.2    -      -       -      +
    184A  GLY*     1.3    74.8    -      -       -      +
    186A  GLU*     1.3    58.7    +      -       -      +
    188A  TYR*     3.2     2.3    +      -       -      +
    189A  HIS*     2.9    36.5    +      -       -      +
    397A  PRO*     4.0    15.0    -      -       +      +
     11B  LEU*     4.1     9.4    -      -       +      -
     15B  GLY      3.8    16.8    -      -       -      +
     56B  TYR*     3.5    25.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 186 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    182A  ARG*     2.8    46.4    +      -       +      +
    183A  LEU      3.8     2.9    -      -       -      +
    185A  ALA*     1.3    77.8    -      -       -      +
    187A  VAL*     1.3    57.1    +      -       -      +
    189A  HIS*     3.4     6.9    +      -       -      +
    190A  THR*     2.8    34.1    +      -       -      +
    233A  ALA*     4.6     5.3    -      -       +      +
    235A  TYR*     2.7    37.2    +      -       +      -
     54B  GLN      3.6     8.5    -      -       -      +
     55B  ARG*     3.6     2.4    -      -       -      -
     56B  TYR*     2.9    35.4    +      -       +      +
     57B  LEU*     4.1    11.8    -      -       +      +
----------------------------------------------------------
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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
----------------------------------------------------------
    151A  VAL*     5.8     2.0    -      -       +      -
    169A  ILE*     4.6    17.5    -      -       +      -
    183A  LEU      2.9    21.9    +      -       -      +
    184A  GLY*     3.8     4.7    -      -       -      +
    186A  GLU*     1.3    71.9    -      -       -      +
    188A  TYR*     1.3    57.4    +      -       -      +
    190A  THR*     3.6     5.3    -      -       -      -
    191A  LEU*     2.7    37.0    +      -       +      +
    226A  VAL*     4.8     1.1    -      -       +      +
    229A  ALA*     3.9    19.6    -      -       +      +
    230A  ILE*     4.0    23.8    -      -       +      +
    233A  ALA*     3.9    19.7    -      -       +      -
    235A  TYR*     4.2    10.3    -      -       +      -
    239A  ILE*     4.6    14.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 188 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151A  VAL*     3.8    25.3    -      -       +      +
    184A  GLY      3.0    18.6    +      -       -      +
    185A  ALA      3.4     4.5    -      -       -      +
    187A  VAL*     1.3    76.8    -      -       -      +
    189A  HIS*     1.3    77.4    +      +       -      +
    191A  LEU*     3.3     5.1    +      -       -      -
    192A  LYS*     3.1    18.7    +      -       +      -
    206A  VAL*     3.5    11.4    -      -       -      +
    210A  GLY      2.6    30.3    +      -       -      -
    211A  GLY*     4.4     2.7    -      -       -      -
    212A  PHE*     3.3    48.5    -      +       -      -
    396A  ALA*     3.8     7.6    -      -       +      -
    397A  PRO*     3.6    22.2    -      -       +      -
    398A  CYS*     3.2    27.0    -      -       +      +
     14B  ARG      4.3    11.7    -      -       -      -
----------------------------------------------------------
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Residues in contact with HIS 189 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185A  ALA*     2.9    31.8    +      -       +      +
    186A  GLU      3.9     3.6    -      -       -      +
    188A  TYR*     1.3    84.6    -      +       -      +
    190A  THR*     1.3    66.3    +      -       -      +
    192A  LYS*     3.3    22.1    +      -       -      +
    193A  GLY*     3.5     4.2    +      -       -      -
     14B  ARG      3.3    27.3    +      -       -      -
     15B  GLY*     2.9    25.8    +      -       -      -
     16B  ASN*     3.5    18.7    +      -       -      -
     56B  TYR*     5.0     7.9    -      +       -      -
     57B  LEU*     3.8    39.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 190 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186A  GLU*     2.8    22.2    +      -       -      +
    187A  VAL*     3.2     4.9    +      -       -      -
    189A  HIS*     1.3    76.2    -      -       -      +
    191A  LEU*     1.3    64.1    +      -       -      +
    193A  GLY*     3.1     4.7    +      -       -      -
    194A  VAL*     3.0    23.6    +      -       +      +
    229A  ALA*     3.8    16.4    -      -       -      +
    232A  LYS*     3.5    46.4    +      -       +      +
    233A  ALA*     3.8    13.5    -      -       -      +
     57B  LEU*     5.4     4.4    -      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    151A  VAL*     3.6    38.6    -      -       +      +
    152A  ILE*     3.7    20.0    -      -       +      -
    187A  VAL*     2.7    18.4    +      -       +      +
    188A  TYR*     3.4     5.8    -      -       -      +
    190A  THR*     1.3    78.4    -      -       -      +
    192A  LYS*     1.3    61.5    +      -       -      +
    194A  VAL*     4.2     2.2    -      -       +      -
    195A  ILE*     2.9    60.0    +      -       +      +
    212A  PHE*     3.7     9.6    -      -       +      -
    225A  LEU*     3.4    33.2    -      -       +      +
    226A  VAL*     4.2     2.9    -      -       +      +
    229A  ALA*     3.7    13.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 192 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188A  TYR*     3.1     8.6    +      -       +      +
    189A  HIS*     3.5    15.7    -      -       -      +
    190A  THR      3.1     0.6    -      -       -      -
    191A  LEU*     1.3    75.3    -      -       -      +
    193A  GLY*     1.3    58.3    -      -       -      +
    195A  ILE*     3.5     2.1    +      -       -      +
    196A  LYS*     2.9    33.2    +      -       +      +
    201A  LYS*     5.9     6.1    -      -       -      +
    204A  THR*     3.7    33.3    -      -       +      +
    212A  PHE*     3.3    36.1    -      -       +      -
     14B  ARG*     6.1     1.8    -      -       -      +
    208B  ASP*     4.9    12.5    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLY 193 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189A  HIS      3.5     4.9    +      -       -      -
    190A  THR*     3.1     6.8    +      -       -      -
    192A  LYS*     1.3    77.2    -      -       -      +
    194A  VAL*     1.3    65.5    +      -       -      +
    196A  LYS*     4.2     8.1    -      -       -      -
    197A  ASP*     2.9    37.0    +      -       -      -
    232A  LYS*     5.1     4.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 194 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190A  THR*     3.0    23.9    +      -       +      +
    191A  LEU*     3.3    11.2    +      -       +      +
    193A  GLY*     1.3    78.8    -      -       -      +
    195A  ILE*     1.3    73.4    +      -       +      +
    197A  ASP*     3.9     5.6    -      -       -      +
    198A  LYS*     3.4    21.3    +      -       +      +
    225A  LEU*     3.9    17.9    -      -       +      +
    228A  GLU*     3.6    34.5    -      -       +      +
    229A  ALA*     4.4     9.6    -      -       -      -
    232A  LYS*     3.9    28.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 195 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152A  ILE*     4.6    10.1    -      -       +      -
    191A  LEU*     2.9    47.2    +      -       +      +
    192A  LYS*     3.8     3.8    -      -       -      +
    194A  VAL*     1.3    77.5    -      -       +      +
    196A  LYS*     1.3    56.2    +      -       -      +
    199A  TYR*     2.7    42.2    +      -       +      +
    203A  ALA*     3.5    38.8    -      -       +      +
    204A  THR*     4.5     3.8    -      -       +      -
    212A  PHE*     5.0     4.7    -      -       +      -
    214A  PRO*     4.0    11.7    -      -       +      -
    225A  LEU*     3.5    33.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 196 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192A  LYS*     2.9    22.1    +      -       +      +
    193A  GLY*     3.8     8.3    -      -       -      +
    195A  ILE*     1.3    77.6    -      -       -      +
    197A  ASP*     1.3    66.5    +      -       -      +
    200A  GLY*     2.7    47.7    +      -       -      -
    201A  LYS*     4.2    30.1    -      -       +      +
    204A  THR*     3.9     9.8    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 197 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193A  GLY*     2.9    23.9    +      -       -      +
    194A  VAL*     3.9     5.9    -      -       -      +
    195A  ILE      3.3     0.2    -      -       -      -
    196A  LYS*     1.3    85.8    -      -       -      +
    198A  LYS*     1.3    59.7    +      -       +      +
    232A  LYS*     4.5    10.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 198 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194A  VAL*     3.4    13.5    +      -       +      +
    195A  ILE      3.3     1.2    +      -       -      -
    196A  LYS      3.2     0.2    -      -       -      -
    197A  ASP*     1.3    81.8    -      -       +      +
    199A  TYR*     1.3    90.0    +      -       +      +
    200A  GLY      3.7     0.4    -      -       -      -
    221A  GLU*     2.7    31.0    +      -       -      +
    224A  GLU*     5.9     2.4    -      -       -      +
    225A  LEU*     4.6     8.6    -      -       +      +
    228A  GLU*     6.0     2.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 199 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195A  ILE*     2.7    31.5    +      -       +      +
    198A  LYS*     1.3   101.7    -      -       +      +
    200A  GLY*     1.3    57.4    +      -       -      +
    202A  ASP*     3.3    15.9    -      -       -      +
    203A  ALA*     3.7    17.7    -      -       +      +
    214A  PRO*     4.8     2.2    -      -       +      -
    215A  ASN*     3.9    25.1    +      -       -      +
    216A  ILE*     3.5    26.1    -      -       +      +
    221A  GLU*     2.4    40.7    +      -       -      +
    225A  LEU*     4.2    11.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 200 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    196A  LYS*     2.7    37.9    +      -       -      -
    198A  LYS      3.7     1.0    -      -       -      -
    199A  TYR*     1.3    76.7    -      -       -      +
    201A  LYS*     1.3    65.6    +      -       -      -
    202A  ASP*     3.4     4.0    -      -       -      -
    203A  ALA*     3.4    11.3    +      -       -      +
    204A  THR*     4.1     1.2    -      -       -      +
----------------------------------------------------------
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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