Contacts of the helix formed by residues 320 - 347 (chain H) in PDB entry 2R9R


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 320 (chain H).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    316H  THR      2.7    22.3    +      -       -      -
    317H  LEU*     3.0     8.3    +      -       -      -
    319H  ALA*     1.3    78.4    -      -       -      +
    321H  MET*     1.3    64.5    +      -       -      +
    322H  ARG      3.1     3.4    +      -       -      -
    323H  GLU*     3.1    20.5    +      -       -      -
    324H  LEU*     2.8    26.0    +      -       -      +
    405H  ILE*     3.9    23.7    -      -       -      +
    408H  ASN*     2.8    23.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 321 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317H  LEU*     3.2    13.3    +      -       -      +
    318H  LYS*     3.4    22.9    -      -       +      +
    319H  ALA      3.5     2.6    -      -       -      -
    320H  SER*     1.3    76.4    -      -       -      +
    322H  ARG*     1.3    63.9    +      -       -      +
    324H  LEU*     3.3    14.1    +      -       -      +
    325H  GLY*     2.9    21.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 322 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    320H  SER      3.1     0.8    +      -       -      -
    321H  MET*     1.3    80.4    -      -       -      +
    323H  GLU*     1.3    74.2    +      -       -      +
    325H  GLY*     3.1     4.0    +      -       -      -
    326H  LEU*     3.0    56.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 323 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    319H  ALA      3.6     7.4    -      -       -      +
    320H  SER*     3.3    37.1    -      -       -      +
    322H  ARG*     1.3    88.3    +      -       -      +
    324H  LEU*     1.3    63.3    +      -       -      +
    325H  GLY      3.0     2.0    -      -       -      -
    326H  LEU*     3.1    11.8    +      -       +      +
    327H  LEU*     3.0    23.6    +      -       -      +
    401H  PRO*     3.7    19.6    -      -       +      +
    404H  VAL*     3.7    28.0    -      -       +      +
    405H  ILE*     4.0    15.5    -      -       +      -
    408H  ASN*     4.9     2.5    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 324 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    317H  LEU*     4.1    43.3    -      -       +      +
    320H  SER*     2.8    18.0    +      -       -      +
    321H  MET*     3.5    14.4    -      -       -      +
    323H  GLU*     1.3    72.7    -      -       -      +
    325H  GLY*     1.3    61.3    +      -       -      +
    327H  LEU*     3.4    15.3    -      -       +      +
    328H  ILE*     3.2    29.6    +      -       +      +
    405H  ILE*     3.4    31.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 325 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    321H  MET      2.9    14.6    +      -       -      -
    322H  ARG      3.5     3.8    -      -       -      -
    324H  LEU*     1.3    75.3    -      -       -      +
    326H  LEU*     1.3    61.1    +      -       -      +
    327H  LEU      3.1     1.6    -      -       -      -
    328H  ILE*     3.2     7.9    +      -       -      +
    329H  PHE*     2.8    30.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 326 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    322H  ARG*     3.0    55.0    +      -       +      +
    323H  GLU*     3.1    13.0    +      -       +      +
    325H  GLY*     1.3    77.0    -      -       -      +
    327H  LEU*     1.3    54.7    +      -       -      +
    329H  PHE*     4.1     8.7    -      -       +      -
    330H  PHE*     2.7    69.4    +      -       +      -
    401H  PRO*     4.5     6.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 327 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    323H  GLU      3.0    12.9    +      -       -      +
    324H  LEU*     3.4    24.9    -      -       +      +
    326H  LEU*     1.3    77.1    -      -       -      +
    328H  ILE*     1.3    74.1    +      -       +      +
    330H  PHE*     4.0     2.4    -      -       -      +
    331H  LEU*     3.1    32.3    +      -       +      +
    397H  THR*     4.3     7.7    -      -       +      +
    398H  ILE*     3.9    44.0    -      -       +      +
    401H  PRO*     4.1    14.7    -      -       +      +
    402H  VAL*     4.7    10.8    -      -       +      -
    405H  ILE*     5.2     4.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 328 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    324H  LEU*     3.2    17.5    -      -       +      +
    325H  GLY*     3.2     8.6    +      -       -      +
    327H  LEU*     1.3    87.2    -      -       +      +
    329H  PHE*     1.3    57.9    +      -       -      +
    331H  LEU*     3.6     9.7    -      -       +      +
    332H  PHE*     2.9    30.5    +      -       +      +
    500H  PGW      3.8    27.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 329 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325H  GLY      2.8    17.9    +      -       -      +
    326H  LEU*     3.5    10.1    -      -       +      +
    327H  LEU      3.2     0.2    -      -       -      -
    328H  ILE*     1.3    74.0    -      -       -      +
    330H  PHE*     1.3    84.8    +      +       -      +
    332H  PHE*     3.2    18.2    +      +       -      +
    333H  ILE*     3.0    51.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 330 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    326H  LEU*     2.7    54.3    +      -       +      +
    327H  LEU      4.0     0.9    -      -       -      +
    329H  PHE*     1.3    92.4    -      +       -      +
    331H  LEU*     1.3    62.7    +      -       -      +
    333H  ILE*     3.1    11.1    +      -       +      +
    334H  GLY*     2.9    20.8    +      -       -      -
    368H  MET*     5.2     0.2    -      -       -      +
    397H  THR*     3.8    26.6    +      -       +      +
    400H  LEU*     5.0    15.5    -      -       +      -
    401H  PRO*     4.1    19.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 331 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    327H  LEU*     3.1    25.0    +      -       +      +
    328H  ILE*     3.6     9.9    -      -       +      +
    330H  PHE*     1.3    76.1    -      -       -      +
    332H  PHE*     1.3    53.6    +      -       -      +
    334H  GLY*     3.2     2.0    +      -       -      +
    335H  VAL*     2.7    48.6    +      -       +      +
    365H  VAL*     5.1     8.5    -      -       +      -
    368H  MET*     4.2    25.5    -      -       +      +
    369H  THR*     4.8    15.0    -      -       +      -
    397H  THR*     3.8    22.3    -      -       +      +
    398H  ILE*     4.4    18.2    -      -       +      -
    500H  PGW      4.8    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 332 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    328H  ILE*     2.9    17.0    +      -       +      +
    329H  PHE*     3.2    21.5    -      +       -      +
    331H  LEU*     1.3    75.9    -      -       -      +
    333H  ILE*     1.3    84.3    +      -       +      +
    335H  VAL*     3.3     7.2    +      -       +      +
    336H  ILE*     3.0    53.9    +      -       +      +
    500H  PGW      5.2    11.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 333 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    329H  PHE*     3.0    42.7    +      -       +      +
    330H  PHE*     3.1    11.6    +      -       +      +
    332H  PHE*     1.3    96.3    -      -       +      +
    334H  GLY*     1.3    63.0    +      -       -      +
    336H  ILE*     3.8     3.4    -      -       -      +
    337H  LEU*     2.9    36.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 334 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330H  PHE      2.9    13.8    +      -       -      -
    331H  LEU      3.6     2.2    -      -       -      -
    333H  ILE*     1.3    77.2    -      -       -      +
    335H  VAL*     1.3    56.2    +      -       -      +
    337H  LEU*     3.1     5.9    +      -       -      -
    338H  PHE*     2.8    48.1    +      -       -      +
    368H  MET*     4.0    17.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 335 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    331H  LEU*     2.7    30.5    +      -       +      +
    332H  PHE*     3.6     8.3    -      -       +      +
    334H  GLY*     1.3    72.1    -      -       -      +
    336H  ILE*     1.3    60.7    +      -       +      +
    339H  SER*     2.8    39.4    +      -       -      +
    361H  PHE*     3.7    36.3    -      -       +      +
    364H  ALA*     3.8    13.6    -      -       +      +
    365H  VAL*     3.6    30.1    -      -       +      +
    368H  MET*     3.9     9.5    -      -       -      -
    500H  PGW      5.2     8.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ILE 336 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    332H  PHE*     3.0    55.6    +      -       +      +
    333H  ILE*     4.0     2.9    -      -       -      +
    335H  VAL*     1.3    79.0    -      -       +      +
    337H  LEU*     1.3    62.2    +      -       -      +
    340H  SER*     2.7    38.3    +      -       -      +
    357H  ILE*     5.7     1.3    -      -       +      -
    361H  PHE*     4.0    28.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 337 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    333H  ILE*     2.9    28.9    +      -       +      +
    334H  GLY*     3.5     6.7    -      -       -      +
    336H  ILE*     1.3    79.7    -      -       -      +
    338H  PHE*     1.3    81.3    +      -       +      +
    340H  SER*     3.7     3.7    -      -       -      -
    341H  ALA*     3.3    22.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 338 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334H  GLY*     2.8    41.6    +      -       -      +
    335H  VAL      4.3     0.7    -      -       -      +
    337H  LEU*     1.3    89.0    -      -       +      +
    339H  SER*     1.3    64.2    +      -       -      +
    340H  SER      3.2     1.6    -      -       -      -
    341H  ALA*     4.0     3.3    -      -       +      +
    342H  VAL*     3.0    27.7    +      -       -      +
    363H  TRP*     3.8     6.6    -      -       +      -
    364H  ALA*     4.7     2.7    -      -       +      -
    368H  MET*     4.5     4.5    -      -       +      -
    386H  VAL*     3.9    15.2    -      -       +      +
    389H  LEU*     3.9    17.7    -      -       +      -
    390H  CYS*     3.7    50.9    -      -       +      -
    393H  ALA*     3.7    33.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with SER 339 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    335H  VAL      2.8    26.1    +      -       -      -
    336H  ILE      4.2     0.7    -      -       -      -
    338H  PHE*     1.3    71.8    -      -       -      +
    340H  SER*     1.3    63.5    +      -       -      +
    342H  VAL*     3.3     5.1    -      -       -      +
    343H  TYR*     3.0    25.6    +      -       -      +
    357H  ILE*     3.7    13.2    -      -       -      +
    360H  ALA*     3.2    15.4    +      -       -      +
    361H  PHE*     3.1    46.2    +      -       -      -
    363H  TRP*     4.8     0.4    -      -       -      -
    364H  ALA*     3.4     5.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with SER 340 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    336H  ILE*     2.7    27.7    +      -       -      +
    337H  LEU*     3.7     5.2    -      -       -      -
    339H  SER*     1.3    78.6    -      -       -      +
    341H  ALA*     1.3    64.1    +      -       -      +
    343H  TYR*     3.1     2.9    +      -       -      +
    344H  PHE*     3.1    34.6    +      -       -      -
    357H  ILE*     3.7    30.4    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 341 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337H  LEU*     3.3    18.2    +      -       +      +
    338H  PHE*     3.4     3.1    +      -       +      +
    340H  SER*     1.3    80.0    -      -       -      +
    342H  VAL*     1.3    64.0    +      -       -      +
    344H  PHE*     3.3     6.5    +      -       -      +
    345H  ALA*     3.0    22.5    +      -       -      +
    386H  VAL*     3.8    26.0    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 342 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    338H  PHE      3.0    16.6    +      -       -      +
    339H  SER      3.3    12.1    -      -       -      +
    341H  ALA*     1.3    76.6    -      -       -      +
    343H  TYR*     1.3    68.7    +      -       -      +
    345H  ALA*     3.3     5.0    +      -       -      -
    346H  GLU*     3.1    31.7    +      -       +      +
    354H  PHE*     3.9    28.3    -      -       +      -
    360H  ALA*     4.0    11.4    -      -       +      -
    363H  TRP*     3.6    32.5    -      -       +      -
    378H  PRO*     4.0    17.7    -      -       +      -
    383H  GLY*     4.2     9.0    -      -       -      +
    386H  VAL*     3.8     7.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with TYR 343 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    339H  SER      3.0    15.5    +      -       -      +
    340H  SER      3.1     3.3    +      -       -      +
    342H  VAL*     1.3    85.4    -      -       -      +
    344H  PHE*     1.3    92.5    +      +       -      +
    346H  GLU*     3.3     1.6    +      -       -      +
    347H  ALA*     2.8    39.3    +      -       +      +
    352H  SER*     5.2     0.3    +      -       -      -
    354H  PHE*     3.6    27.5    -      -       +      +
    355H  PRO      3.8     5.9    +      -       -      -
    356H  SER*     3.5    35.4    -      -       -      +
    357H  ILE*     3.7    24.5    -      -       +      -
    360H  ALA*     5.0     0.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 344 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    340H  SER*     3.1    27.5    +      -       -      +
    341H  ALA*     4.0     4.9    -      -       -      +
    343H  TYR*     1.3   103.5    -      +       -      +
    345H  ALA*     1.3    61.8    +      -       -      +
    346H  GLU      3.4     0.3    +      -       -      -
    347H  ALA*     3.5    18.0    +      -       +      +
    348H  ASP*     4.8     3.6    +      -       -      +
    357H  ILE*     3.9    24.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 345 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341H  ALA      3.0    17.7    +      -       -      +
    342H  VAL*     3.8     4.9    -      -       -      +
    343H  TYR      3.2     0.2    -      -       -      -
    344H  PHE*     1.3    77.5    -      -       -      +
    346H  GLU*     1.3    58.1    +      -       -      +
    347H  ALA      3.5     0.2    -      -       -      -
    348H  ASP      5.3     0.7    +      -       -      -
    349H  GLU*     4.9     1.4    -      -       -      +
    380H  THR*     3.3    18.9    +      -       -      +
    382H  GLY*     3.9    10.5    -      -       -      +
    383H  GLY*     3.7    26.5    -      -       -      +
    386H  VAL*     4.6     3.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 346 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    342H  VAL*     3.1    21.6    +      -       +      +
    343H  TYR      3.7     1.3    -      -       -      +
    345H  ALA*     1.3    75.8    -      -       -      +
    347H  ALA*     1.3    66.7    +      -       -      +
    348H  ASP      3.3     2.5    -      -       -      -
    349H  GLU*     3.1    20.7    +      -       +      +
    352H  SER*     3.2    33.8    -      -       -      +
    353H  GLN      4.9     0.7    +      -       -      -
    354H  PHE*     3.5    20.9    -      -       +      -
    377H  VAL      4.4     0.9    -      -       -      +
    378H  PRO*     3.3     9.0    -      -       -      +
    379H  THR*     2.7    35.1    +      -       -      +
    380H  THR*     2.6    37.3    +      -       -      +
    383H  GLY*     3.4     9.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ALA 347 (chain H). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    343H  TYR*     2.8    35.5    +      -       +      +
    344H  PHE*     3.5    21.0    +      -       +      +
    346H  GLU*     1.3    76.2    -      -       -      +
    348H  ASP*     1.3    63.9    +      -       -      +
    349H  GLU      3.1    10.4    +      -       -      +
    352H  SER*     4.8     4.4    -      -       -      -
    354H  PHE      5.9     0.2    -      -       -      -
----------------------------------------------------------
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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