Contacts of the helix formed by residues 208 - 237 (chain R) in PDB entry 3SN6


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 PHE 208 (chain R).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121R  ILE*     4.0     7.5    -      -       +      +
    204R  SER      2.8     6.4    +      -       -      +
    206R  VAL      3.4     0.2    -      -       -      -
    207R  SER*     1.3    80.3    -      -       -      +
    209R  TYR*     1.3    81.7    +      +       -      +
    210R  VAL      3.4     1.8    -      -       -      -
    211R  PRO*     3.0     7.0    -      -       -      +
    212R  LEU*     2.9    40.7    +      -       +      +
    282R  PHE*     3.8    30.7    -      +       -      -
    283R  THR*     5.5     0.4    -      -       -      -
    286R  TRP*     3.4    34.8    -      -       +      -
    287R  LEU*     3.5    46.0    -      -       +      -
    290R  PHE*     3.4    39.7    -      +       +      -
    291R  ILE*     5.3     0.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 209 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    204R  SER*     3.2    48.8    +      -       -      -
    205R  ILE*     3.5    22.4    -      -       +      +
    208R  PHE*     1.3    91.2    -      +       -      +
    210R  VAL*     1.3    64.2    +      -       -      +
    212R  LEU*     3.0    12.1    +      -       +      +
    213R  VAL*     2.9    28.7    +      -       +      +
    287R  LEU*     5.8     0.2    -      -       +      -
    290R  PHE*     2.6    30.9    +      -       +      -
    291R  ILE*     3.1    26.5    -      -       +      +
    294R  ILE*     3.3    19.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 210 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    122R  GLU*     5.9     1.1    -      -       -      +
    205R  ILE*     2.9    39.6    +      -       +      +
    206R  VAL*     4.7     6.3    -      -       +      +
    209R  TYR*     1.3    70.6    -      -       -      +
    211R  PRO*     1.3    72.6    -      -       +      +
    213R  VAL*     3.0    10.3    +      -       -      +
    214R  ILE*     2.9    45.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with PRO 211 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121R  ILE*     3.8    24.0    -      -       +      +
    122R  GLU*     4.0    15.5    -      -       -      +
    125R  CYS*     3.7    31.9    -      -       +      -
    206R  VAL      3.6    18.8    -      -       -      +
    207R  SER      4.1     2.5    -      -       -      +
    208R  PHE      3.0    15.0    -      -       -      +
    210R  VAL*     1.3    97.4    -      -       +      +
    212R  LEU*     1.3    56.2    +      -       -      +
    214R  ILE*     3.8     1.2    -      -       +      +
    215R  MET*     2.9    37.7    +      -       -      +
    282R  PHE*     5.1     0.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 212 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    208R  PHE*     2.9    42.1    +      -       +      +
    209R  TYR*     3.0    17.9    +      -       +      +
    211R  PRO*     1.3    77.6    -      -       -      +
    213R  VAL*     1.3    60.1    +      -       +      +
    215R  MET*     3.6     2.8    -      -       +      +
    216R  VAL*     2.9    47.4    +      -       +      +
    279R  MET*     5.6     3.4    -      -       -      -
    282R  PHE*     3.7    28.7    -      -       +      -
    283R  THR*     5.0     9.4    -      -       +      +
    287R  LEU*     3.8    15.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 213 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    209R  TYR*     2.9    23.2    +      -       +      +
    210R  VAL*     3.0     8.0    +      -       -      +
    212R  LEU*     1.3    76.1    -      -       +      +
    214R  ILE*     1.3    68.9    +      -       +      +
    216R  VAL*     3.0     9.7    +      -       +      +
    217R  PHE*     3.0    26.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 214 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    125R  CYS*     3.7    30.3    -      -       -      +
    129R  VAL*     4.2    17.7    -      -       +      -
    210R  VAL*     2.9    34.9    +      -       +      +
    211R  PRO*     4.3     0.7    -      -       +      -
    213R  VAL*     1.3    78.9    -      -       +      +
    215R  MET*     1.3    64.0    +      -       -      +
    217R  PHE*     3.4     5.4    +      -       -      +
    218R  VAL*     2.9    35.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with MET 215 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121R  ILE      5.0     0.2    -      -       -      +
    124R  LEU*     4.3     7.6    -      -       +      +
    125R  CYS*     3.8    32.8    -      -       -      -
    128R  ALA*     3.8    11.9    -      -       +      -
    211R  PRO      2.9    26.6    +      -       -      +
    212R  LEU*     3.6     4.3    -      -       +      +
    214R  ILE*     1.3    77.4    -      -       -      +
    216R  VAL*     1.3    62.8    +      -       -      +
    218R  VAL*     3.1     5.3    +      -       -      -
    219R  TYR*     2.9    40.6    +      -       +      +
    278R  ILE      5.0     2.7    -      -       -      +
    279R  MET*     3.1    36.9    -      -       +      +
    282R  PHE*     3.9    40.2    -      -       +      -
    326R  TYR*     5.2     3.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 216 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    212R  LEU*     2.9    44.0    +      -       +      +
    213R  VAL*     3.0     9.4    +      -       +      +
    215R  MET*     1.3    75.0    -      -       -      +
    217R  PHE*     1.3    62.0    +      -       -      +
    219R  TYR*     4.5     0.3    -      -       -      +
    220R  SER*     2.5    40.9    +      -       -      +
    279R  MET*     3.6    12.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 217 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132R  TYR*     4.0    23.6    -      +       -      -
    213R  VAL*     3.0    19.0    +      -       +      +
    214R  ILE*     3.9     4.3    -      -       -      +
    216R  VAL*     1.3    79.2    -      -       -      +
    218R  VAL*     1.3    66.6    +      -       +      +
    220R  SER*     3.3     6.4    -      -       -      -
    221R  ARG*     2.9    37.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 218 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    128R  ALA*     3.2    30.1    -      -       +      +
    129R  VAL*     4.8     7.9    -      -       +      -
    132R  TYR*     3.2    42.4    -      -       +      -
    214R  ILE*     2.9    38.1    +      -       +      +
    215R  MET*     3.6     4.3    -      -       -      +
    216R  VAL      3.1     0.2    -      -       -      -
    217R  PHE*     1.3    78.7    -      -       +      +
    219R  TYR*     1.3    76.4    +      -       +      +
    220R  SER      3.0     1.1    -      -       -      -
    221R  ARG*     3.0     4.9    +      -       -      -
    222R  VAL*     2.9    25.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 219 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124R  LEU      4.4     1.0    +      -       -      -
    127R  ILE*     4.3     2.1    -      -       -      +
    128R  ALA*     3.2    44.9    +      -       +      +
    131R  ARG*     4.3    17.6    -      -       +      -
    215R  MET*     2.9    32.4    +      -       +      +
    218R  VAL*     1.3    82.2    -      -       +      +
    220R  SER*     1.3    56.2    +      -       -      +
    222R  VAL*     3.6    14.1    -      -       +      +
    223R  PHE*     2.9    28.9    +      -       -      +
    275R  LEU*     4.2    16.9    -      -       +      +
    278R  ILE*     3.4    41.9    -      -       +      +
    279R  MET*     3.5    35.2    -      -       +      -
    326R  TYR*     4.3     7.6    +      -       -      -
----------------------------------------------------------
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Residues in contact with SER 220 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    216R  VAL*     2.5    35.8    +      -       -      +
    217R  PHE*     3.3     9.2    -      -       -      -
    219R  TYR*     1.3    73.6    -      -       -      +
    221R  ARG*     1.3    67.5    +      -       -      +
    223R  PHE*     3.1     9.6    +      -       -      +
    224R  GLN*     2.9    25.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 221 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    380A  ARG*     5.5     2.8    -      -       -      +
    132R  TYR*     3.1    43.4    +      -       +      -
    136R  THR*     3.3    32.9    +      -       -      +
    217R  PHE*     2.9    25.8    +      -       +      +
    218R  VAL      3.0     1.3    +      -       -      +
    220R  SER*     1.3    74.7    -      -       -      +
    222R  VAL*     1.3    63.0    +      -       -      +
    224R  GLN*     3.0    12.8    -      -       +      +
    225R  GLU*     2.9    38.8    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 222 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    388A  LEU*     4.8     0.7    -      -       +      +
    393A  LEU*     3.7    17.5    -      -       +      -
    131R  ARG*     4.2     2.5    -      -       +      +
    132R  TYR*     3.8    31.6    -      -       +      +
    135R  ILE*     3.6    34.5    -      -       +      -
    136R  THR*     5.2     1.1    -      -       -      +
    218R  VAL*     2.9    21.3    +      -       +      +
    219R  TYR*     3.6    14.4    -      -       +      +
    221R  ARG*     1.3    76.9    -      -       -      +
    223R  PHE*     1.3    66.6    +      -       -      +
    225R  GLU*     2.9    20.7    +      -       -      +
    226R  ALA*     2.9    11.7    +      -       +      +
    275R  LEU*     4.5     9.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 223 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    219R  TYR      2.9    19.3    +      -       -      +
    220R  SER*     3.1     8.0    +      -       -      +
    222R  VAL*     1.3    78.6    -      -       -      +
    224R  GLN*     1.3    74.1    +      -       -      +
    226R  ALA*     3.1     9.8    +      -       +      +
    227R  LYS*     2.9    46.4    +      -       +      +
    268R  GLU*     5.7     1.1    -      -       +      -
    271R  ALA*     5.0     6.3    -      -       +      -
    272R  LEU*     4.7    18.4    -      -       +      -
    275R  LEU*     3.4    30.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 224 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    220R  SER      2.9    15.8    +      -       -      +
    221R  ARG*     3.0    20.2    -      -       +      +
    223R  PHE*     1.3    89.8    -      -       -      +
    225R  GLU*     1.3    61.9    +      -       +      +
    227R  LYS*     3.2    17.7    +      -       -      +
    228R  ARG*     2.9    23.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLU 225 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    380A  ARG*     4.5     3.6    +      -       -      -
    384A  GLN*     3.0    22.2    +      -       -      +
    388A  LEU*     4.7     0.4    -      -       -      -
    135R  ILE*     3.7    31.7    -      -       +      +
    136R  THR*     4.2    11.4    -      -       -      +
    221R  ARG*     2.9    38.1    +      -       +      +
    222R  VAL*     2.9     9.4    +      -       -      +
    224R  GLN*     1.3    77.2    -      -       -      +
    226R  ALA*     1.3    63.3    +      -       -      +
    228R  ARG*     3.1    37.6    +      -       -      +
    229R  GLN*     2.9    28.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 226 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    388A  LEU*     3.5    24.6    -      -       +      +
    393A  LEU*     3.8    27.8    -      -       +      +
    394A  LEU*     5.6     0.2    -      -       +      -
    222R  VAL      2.9    11.5    +      -       -      +
    223R  PHE*     3.1    16.1    +      -       +      +
    225R  GLU*     1.3    75.1    -      -       -      +
    227R  LYS*     1.3    65.7    +      -       -      +
    229R  GLN*     3.3     2.4    +      -       -      +
    230R  LEU*     2.9    28.4    +      -       -      +
    271R  ALA*     4.8     7.4    -      -       +      +
    275R  LEU*     5.9     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 227 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    223R  PHE*     2.9    37.7    +      -       +      +
    224R  GLN*     3.5    21.4    +      -       -      +
    226R  ALA*     1.3    75.7    -      -       -      +
    228R  ARG*     1.3    63.5    +      -       -      +
    230R  LEU*     3.3    11.4    +      -       -      +
    231R  GLN*     2.9    24.7    +      -       +      +
    268R  GLU*     6.1     5.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with ARG 228 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    380A  ARG*     4.5    17.4    -      -       -      +
    381A  ASP*     4.3     4.4    +      -       -      -
    384A  GLN*     3.9    17.0    +      -       -      +
    224R  GLN      2.9    13.4    +      -       -      +
    225R  GLU*     3.1    38.2    +      -       -      +
    227R  LYS*     1.3    75.8    -      -       -      +
    229R  GLN*     1.3    63.8    +      -       -      +
    231R  GLN*     2.9    23.3    +      -       -      +
    232R  LYS*     2.9    50.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 229 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    381A  ASP*     3.6    18.0    +      -       -      +
    384A  GLN*     2.8    47.6    +      -       +      +
    385A  ARG*     3.4    32.1    +      -       +      +
    388A  LEU*     3.9    22.9    -      -       +      -
    394A  LEU*     5.0     2.9    -      -       +      -
    135R  ILE*     6.2     0.2    -      -       +      -
    225R  GLU*     2.9    19.2    +      -       +      +
    226R  ALA      3.7     6.3    -      -       -      +
    228R  ARG*     1.3    81.6    -      -       -      +
    230R  LEU*     1.3    57.3    +      -       -      +
    232R  LYS*     3.3    15.1    +      -       -      +
    233R  ILE*     2.9    35.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 230 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    394A  LEU*     3.5    29.4    -      -       +      +
    226R  ALA      2.9    15.1    +      -       -      +
    227R  LYS*     3.5    11.9    -      -       -      +
    229R  GLN*     1.3    75.4    -      -       -      +
    231R  GLN*     1.3    58.6    +      -       -      +
    233R  ILE*     3.4    15.4    +      -       +      +
    234R  ASP*     2.9    29.3    +      -       -      +
    267R  LYS*     4.8    13.9    -      -       +      +
    268R  GLU*     4.0    38.8    -      -       +      +
    271R  ALA*     4.3    16.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLN 231 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    227R  LYS*     2.9    15.7    +      -       +      +
    228R  ARG*     2.9    14.7    +      -       -      +
    230R  LEU*     1.3    73.5    -      -       -      +
    232R  LYS*     1.3    68.4    +      -       +      +
    234R  ASP*     3.0    20.7    +      -       -      +
    235R  LYS*     2.9    26.1    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 232 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377A  ASN*     6.1     1.6    -      -       -      +
    381A  ASP*     3.1    31.6    +      -       -      +
    385A  ARG*     4.2    10.5    -      -       -      +
    228R  ARG*     2.9    47.5    +      -       +      +
    229R  GLN*     3.6    22.0    -      -       -      +
    231R  GLN*     1.3    76.3    -      -       +      +
    233R  ILE*     1.3    63.7    +      -       -      +
    235R  LYS*     3.0    13.0    +      -       -      +
    236R  SER*     2.9    25.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 233 (chain R). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    358A  TYR*     3.4    39.0    -      -       +      +
    385A  ARG*     3.4    27.3    -      -       -      +
    394A  LEU*     4.3    17.0    -      -       +      -
    229R  GLN      2.9    23.9    +      -       -      +
    230R  LEU*     3.5    17.5    -      -       +      +
    232R  LYS*     1.3    75.9    -      -       -      +
    234R  ASP*     1.3    52.6    +      -       -      +
    236R  SER*     2.9     8.2    +      -       -      +
    237R  GLU*     2.6    60.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 234 (chain R). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    230R  LEU      2.9    15.1    +      -       -      +
    231R  GLN*     3.0    22.2    +      -       -      +
    233R  ILE*     1.3    76.8    -      -       -      +
    235R  LYS*     1.3    63.5    +      -       -      +
    237R  GLU*     2.8    30.6    -      -       -      +
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Residues in contact with LYS 235 (chain R). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323A  ASP*     3.8    28.8    -      -       -      +
    325A  THR*     6.0     6.3    -      -       -      +
    342A  ARG*     4.5     9.4    +      -       -      -
    231R  GLN*     2.9    16.8    +      -       +      +
    232R  LYS*     3.0    15.2    +      -       -      +
    234R  ASP*     1.3    81.8    +      -       -      +
    236R  SER*     1.3    60.1    +      -       -      +
    237R  GLU      5.1     0.5    -      -       -      -
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Residues in contact with SER 236 (chain R). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342A  ARG*     4.5    12.8    +      -       -      +
    346A  LEU*     3.8    32.2    -      -       -      +
    359A  CYS      5.4     3.1    -      -       -      -
    360A  TYR*     6.1     0.7    -      -       -      -
    361A  PRO*     5.0    11.9    -      -       -      +
    232R  LYS*     2.9    10.3    +      -       -      +
    233R  ILE*     2.9    10.5    +      -       -      -
    235R  LYS*     1.3    79.3    -      -       -      +
    237R  GLU*     1.3    57.9    +      -       -      +
    239R  ARG*     4.0     5.0    +      -       -      -
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Residues in contact with GLU 237 (chain R). Click here for Legend to table.
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                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
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    350A  THR*     4.5    13.4    -      -       +      +
    358A  TYR*     5.5     3.1    -      -       -      -
    233R  ILE*     2.6    37.3    +      -       +      +
    234R  ASP*     2.8    28.4    +      -       -      +
    235R  LYS      5.0     0.4    -      -       -      -
    236R  SER*     1.3    74.4    -      -       -      +
    238R  GLY*     1.3    57.9    +      -       -      +
    239R  ARG*     3.3    46.1    +      -       +      +
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il