Contacts of the helix formed by residues 176 - 200 (chain B) 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 B).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  ALA*     3.3     4.9    +      -       -      +
    175B  GLU*     1.3    81.6    -      -       -      +
    177B  PHE*     1.3    59.7    +      -       -      +
    178B  ARG*     3.5    10.1    +      -       -      +
    179B  ASP*     3.2    20.4    +      -       -      +
    180B  ALA*     2.9    26.3    +      -       -      +
    413B  GLU*     3.4    17.4    +      -       -      -
    422B  PHE*     3.8    17.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 177 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    144B  LEU*     4.0    22.9    -      -       +      -
    145B  PRO*     3.0    32.3    -      -       +      -
    147B  PRO*     3.7    19.5    -      -       +      -
    176B  SER*     1.3    70.9    -      -       -      +
    178B  ARG*     1.3    60.1    +      -       -      +
    180B  ALA*     3.0    13.0    +      -       -      +
    181B  MET*     3.0    38.7    +      -       +      +
    392B  ILE*     5.2     0.2    -      -       +      -
    406B  TYR*     3.5    20.9    -      +       -      -
    409B  LEU*     3.3    45.3    -      -       +      -
    410B  MET*     3.9    14.6    -      -       +      -
    413B  GLU*     2.7    25.5    +      -       -      +
    422B  PHE*     3.6     8.8    -      +       -      -
----------------------------------------------------------
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Residues in contact with ARG 178 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
      9A  GLU      6.0     0.4    -      -       -      +
     56A  TYR*     4.4     2.3    +      -       -      -
    176B  SER*     3.9     7.4    +      -       -      +
    177B  PHE*     1.3    75.6    -      -       -      +
    179B  ASP*     1.3    62.2    +      -       -      +
    181B  MET*     3.3     6.1    +      -       -      +
    182B  ARG*     3.3    18.0    +      -       -      +
    410B  MET*     3.3    55.8    +      -       +      +
    413B  GLU*     2.9    37.7    +      -       -      +
    414B  GLU*     3.3    40.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with ASP 179 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    174B  ALA*     3.5     9.1    -      -       -      +
    175B  GLU*     3.0    33.0    +      -       +      +
    176B  SER*     3.2    24.9    +      -       -      +
    177B  PHE      3.2     0.4    -      -       -      -
    178B  ARG*     1.3    76.8    -      -       -      +
    180B  ALA*     1.3    65.8    +      -       -      +
    182B  ARG*     2.9    37.9    +      -       -      +
    183B  LEU*     3.0    29.9    +      -       -      +
    238B  LYS*     5.3     3.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 180 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    147B  PRO*     3.8    30.1    -      -       +      -
    149B  PHE*     3.9     1.9    -      -       -      -
    171B  PRO*     3.5    18.1    -      -       +      +
    174B  ALA*     3.5    18.6    -      -       +      +
    176B  SER      2.9    13.2    +      -       -      +
    177B  PHE      3.0    10.7    +      -       -      +
    179B  ASP*     1.3    78.0    -      -       -      +
    181B  MET*     1.3    56.6    +      -       -      +
    183B  LEU      3.5     0.3    +      -       -      -
    184B  GLY*     3.0    23.7    +      -       -      -
    422B  PHE*     3.9     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with MET 181 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  LEU*     3.6    26.6    -      -       +      +
     56A  TYR*     3.8     7.4    -      -       -      +
    147B  PRO*     4.8     0.2    -      -       -      -
    149B  PHE*     3.6    27.4    -      -       +      -
    177B  PHE*     3.0    37.3    +      -       +      +
    178B  ARG      3.6     7.9    -      -       -      +
    179B  ASP      3.2     0.2    -      -       -      -
    180B  ALA*     1.3    75.6    -      -       -      +
    182B  ARG*     1.3    60.0    +      -       -      +
    184B  GLY*     3.5     0.5    +      -       -      -
    185B  ALA*     2.9    31.2    +      -       -      +
    397B  PRO*     4.5     2.2    -      -       +      -
    403B  LEU*     4.4     3.6    -      -       +      -
    406B  TYR*     3.4    44.6    -      -       +      -
    410B  MET*     3.9    23.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 182 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  GLN      4.0    12.3    +      -       -      -
     55A  ARG*     3.7    34.1    -      -       -      +
     56A  TYR*     3.3    30.5    +      -       +      +
    178B  ARG      3.3     7.4    +      -       -      +
    179B  ASP*     2.9    34.4    +      -       -      +
    181B  MET*     1.3    77.1    -      -       -      +
    183B  LEU*     1.3    74.0    +      -       -      +
    185B  ALA*     3.4     0.9    +      -       -      +
    186B  GLU*     2.9    62.0    +      -       -      +
    235B  TYR*     2.8    29.0    +      -       -      -
    238B  LYS*     6.1     0.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 183 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    171B  PRO*     4.1    13.7    -      -       +      -
    174B  ALA*     4.2    25.8    -      -       +      -
    179B  ASP*     3.0    21.7    +      -       -      +
    180B  ALA      3.8     4.5    -      -       -      +
    182B  ARG*     1.3   107.0    -      -       -      +
    184B  GLY*     1.3    62.8    +      -       -      +
    186B  GLU*     3.3     1.0    +      -       -      +
    187B  VAL*     2.9    30.0    +      -       -      +
    235B  TYR*     3.6    42.4    -      -       +      -
    238B  LYS*     4.2    23.6    -      -       +      +
    239B  ILE*     4.1     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 184 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    149B  PHE*     3.7    30.2    -      -       -      -
    169B  ILE*     5.1     6.9    -      -       -      +
    171B  PRO*     4.2     4.6    -      -       -      +
    180B  ALA      3.0    11.7    +      -       -      -
    181B  MET      3.9     0.2    -      -       -      -
    183B  LEU*     1.3    77.9    -      -       -      +
    185B  ALA*     1.3    56.1    +      -       -      +
    187B  VAL*     3.3     5.3    +      -       -      +
    188B  TYR*     2.9    29.6    +      -       -      +
    239B  ILE*     5.6     0.4    -      -       -      -
    397B  PRO*     4.1     7.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 185 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     11A  LEU*     4.2     8.7    -      -       +      -
     15A  GLY      3.7    17.3    -      -       -      +
     56A  TYR*     3.6    25.1    -      -       +      -
    181B  MET      2.9    18.6    +      -       -      +
    184B  GLY*     1.3    75.0    -      -       -      +
    186B  GLU*     1.3    60.8    +      -       -      +
    188B  TYR*     3.3     1.8    +      -       -      +
    189B  HIS*     2.8    34.0    +      -       +      -
    397B  PRO*     4.1    14.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 186 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     54A  GLN      4.2     3.4    -      -       -      +
     55A  ARG*     3.6     3.2    -      -       -      -
     56A  TYR*     2.7    42.9    +      -       +      +
     57A  LEU*     4.8    16.1    -      -       +      +
    182B  ARG*     2.9    41.5    +      -       +      +
    183B  LEU      3.8     2.9    -      -       -      +
    185B  ALA*     1.3    76.3    -      -       -      +
    187B  VAL*     1.3    58.5    +      -       -      +
    189B  HIS*     3.5     7.1    +      -       -      +
    190B  THR*     2.7    33.9    +      -       -      -
    233B  ALA*     4.6     4.9    -      -       +      +
    235B  TYR*     2.6    36.6    +      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 187 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  VAL*     6.0     1.6    -      -       +      -
    169B  ILE*     4.6    12.8    -      -       +      -
    183B  LEU      2.9    21.0    +      -       -      +
    184B  GLY*     3.8     5.4    -      -       -      +
    186B  GLU*     1.3    72.8    -      -       -      +
    188B  TYR*     1.3    56.9    +      -       -      +
    190B  THR*     3.2     6.1    +      -       -      -
    191B  LEU*     2.8    36.0    +      -       +      +
    226B  VAL*     5.0     0.4    -      -       +      +
    229B  ALA*     4.1    18.3    -      -       +      +
    230B  ILE*     3.2    26.7    -      -       +      +
    233B  ALA*     3.8    19.1    -      -       +      -
    235B  TYR*     4.1     2.0    -      -       +      -
    239B  ILE*     3.4    26.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 188 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  ARG      4.3    10.1    -      -       -      -
     15A  GLY*     5.7     0.2    -      -       -      -
    151B  VAL*     4.0    23.7    -      -       +      +
    184B  GLY      2.9    17.7    +      -       -      +
    185B  ALA      3.5     4.9    -      -       -      +
    186B  GLU      3.3     0.2    -      -       -      -
    187B  VAL*     1.3    77.6    -      -       -      +
    189B  HIS*     1.3    75.1    +      +       -      +
    191B  LEU*     3.2     7.7    +      -       -      +
    192B  LYS*     3.0    29.1    +      -       +      +
    206B  VAL*     3.3    18.4    -      -       -      +
    210B  GLY      2.7    28.6    +      -       -      -
    211B  GLY*     4.6     1.6    -      -       -      -
    212B  PHE*     3.3    35.9    -      +       -      -
    396B  ALA*     4.0     8.1    -      -       +      -
    397B  PRO*     3.7    22.7    -      -       +      -
    398B  CYS*     3.4    22.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with HIS 189 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  ARG      3.3    22.3    +      -       -      -
     15A  GLY*     3.3    22.0    +      -       -      -
     16A  ASN*     3.5    20.3    +      -       -      -
     56A  TYR*     5.3     7.9    +      +       -      -
     57A  LEU*     3.8    31.6    -      -       +      +
     59A  LYS*     6.1     0.9    -      -       -      +
    185B  ALA*     2.8    28.2    +      -       +      +
    186B  GLU*     4.0     3.6    -      -       -      +
    188B  TYR*     1.3    86.7    -      +       -      +
    190B  THR*     1.3    66.1    +      -       -      +
    192B  LYS*     3.3    21.8    +      -       +      +
    193B  GLY*     3.3     9.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with THR 190 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     57A  LEU*     5.2     8.6    -      -       -      +
    186B  GLU*     2.7    23.1    +      -       -      +
    187B  VAL*     3.5     6.3    -      -       -      -
    189B  HIS*     1.3    76.8    -      -       -      +
    191B  LEU*     1.3    64.3    +      -       -      +
    193B  GLY*     3.1     4.2    +      -       -      -
    194B  VAL*     3.0    21.0    +      -       +      +
    229B  ALA*     3.7    15.3    -      -       -      +
    232B  LYS*     3.6    45.3    +      -       +      +
    233B  ALA*     3.9    11.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 191 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    151B  VAL*     3.6    41.3    -      -       +      +
    152B  ILE*     3.7    20.4    -      -       +      -
    187B  VAL*     2.8    15.0    +      -       +      +
    188B  TYR*     3.3     9.9    -      -       -      +
    190B  THR*     1.3    77.6    -      -       -      +
    192B  LYS*     1.3    62.5    +      -       -      +
    194B  VAL*     3.1     6.4    +      -       +      +
    195B  ILE*     2.9    47.4    +      -       +      +
    212B  PHE*     4.0     8.1    -      -       +      -
    225B  LEU*     4.2    18.6    -      -       +      +
    226B  VAL*     5.0     4.0    -      -       +      -
    229B  ALA*     3.7    17.7    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 192 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     14A  ARG*     5.7     4.4    -      -       -      +
    208A  ASP*     4.8    12.3    +      -       -      -
    188B  TYR*     3.0    13.7    +      -       +      +
    189B  HIS*     3.4    17.7    -      -       +      +
    190B  THR      3.2     0.2    -      -       -      -
    191B  LEU*     1.3    76.4    -      -       -      +
    193B  GLY*     1.3    56.2    +      -       -      +
    195B  ILE*     3.4     5.7    +      -       -      +
    196B  LYS*     2.9    28.3    +      -       +      +
    204B  THR*     3.9    33.1    +      -       +      +
    212B  PHE*     3.6    32.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 193 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    189B  HIS      3.3     5.5    +      -       -      -
    190B  THR*     3.1     8.1    +      -       -      -
    192B  LYS*     1.3    77.6    -      -       -      +
    194B  VAL*     1.3    63.5    +      -       -      +
    196B  LYS*     3.3     7.7    +      -       -      -
    197B  ASP*     3.0    35.5    +      -       -      +
    232B  LYS*     5.2     4.5    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 194 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    190B  THR*     3.0    18.3    +      -       +      +
    191B  LEU*     3.5    12.1    -      -       +      +
    193B  GLY*     1.3    75.7    -      -       -      +
    195B  ILE*     1.3    63.8    +      -       +      +
    197B  ASP*     3.5     5.9    +      -       -      +
    198B  LYS*     3.1    26.6    +      -       +      +
    225B  LEU*     3.9    27.4    -      -       +      +
    228B  GLU*     3.5    36.3    -      -       +      +
    229B  ALA*     4.7     8.3    -      -       -      -
    232B  LYS*     3.9    26.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 195 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    152B  ILE*     4.6     6.1    -      -       +      -
    191B  LEU*     2.9    35.2    +      -       +      +
    192B  LYS*     3.8     5.8    -      -       -      +
    194B  VAL*     1.3    74.1    -      -       -      +
    196B  LYS*     1.3    58.8    +      -       -      +
    199B  TYR*     2.6    48.0    +      -       +      -
    200B  GLY      3.3     2.8    +      -       -      -
    203B  ALA*     3.6    36.1    -      -       +      +
    204B  THR*     4.7     2.0    -      -       +      -
    212B  PHE*     5.1     7.4    -      -       +      -
    214B  PRO*     4.1    13.2    -      -       +      -
    225B  LEU*     3.3    45.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 196 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    192B  LYS*     2.9    18.8    +      -       +      +
    193B  GLY*     3.3     9.2    +      -       -      +
    195B  ILE*     1.3    77.4    -      -       -      +
    197B  ASP*     1.3    68.4    +      -       -      +
    200B  GLY*     2.9    34.8    +      -       -      -
    201B  LYS*     4.0    32.6    -      -       +      +
    204B  THR*     3.7    11.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 197 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    193B  GLY*     3.0    20.3    +      -       -      +
    194B  VAL*     3.9     5.1    -      -       -      +
    196B  LYS*     1.3    90.5    +      -       -      +
    198B  LYS*     1.3    59.4    +      -       +      +
    200B  GLY      4.7     0.4    +      -       -      -
    232B  LYS*     4.6    11.3    +      -       -      -
----------------------------------------------------------
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Residues in contact with LYS 198 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    194B  VAL*     3.1    20.3    +      -       +      +
    197B  ASP*     1.3    79.6    -      -       +      +
    199B  TYR*     1.3    97.9    +      -       +      +
    200B  GLY      3.8     0.2    -      -       -      -
    221B  GLU*     4.7    13.5    +      -       -      +
    224B  GLU*     5.8     5.7    -      -       -      +
    225B  LEU*     4.3    12.4    -      -       +      +
    228B  GLU*     5.7     4.3    +      -       -      +
----------------------------------------------------------
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Residues in contact with TYR 199 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195B  ILE*     2.6    38.6    +      -       +      +
    198B  LYS*     1.3   111.5    +      -       +      +
    200B  GLY*     1.3    58.1    +      -       -      +
    202B  ASP*     5.7     1.9    -      -       -      +
    203B  ALA*     3.9    21.8    +      -       +      +
    214B  PRO*     4.3     7.4    -      -       +      -
    215B  ASN*     4.4     9.9    -      -       +      +
    216B  ILE*     3.4    26.7    -      -       +      +
    221B  GLU*     2.7    27.7    +      -       -      +
    225B  LEU*     3.6    26.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 200 (chain B). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    195B  ILE      3.3     0.6    +      -       -      +
    196B  LYS*     2.9    27.8    +      -       -      -
    197B  ASP      4.7     0.2    -      -       -      -
    198B  LYS      3.8     0.6    -      -       -      -
    199B  TYR*     1.3    80.5    -      -       -      +
    201B  LYS*     1.3    66.3    +      -       -      -
    202B  ASP*     3.1     7.2    -      -       -      -
    203B  ALA*     3.0    16.1    +      -       -      +
    204B  THR*     3.9     1.4    -      -       -      +
----------------------------------------------------------
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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