Contacts of the helix formed by residues 366 - 394 (chain A) in PDB entry 6FWF


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 366 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364A  PRO      3.4     1.4    +      -       -      -
    365A  LYS*     1.3    87.2    -      -       +      +
    367A  GLN*     1.3    58.7    +      -       -      +
    368A  ARG      3.5     2.0    -      -       -      +
    369A  ALA*     3.7    20.6    -      -       +      +
    370A  GLY*     3.1    22.2    +      -       -      -
    433A  LEU*     5.9     0.2    -      -       -      +
    436A  ARG*     5.4     1.0    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLN 367 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276A  SER*     3.8    20.0    -      -       -      +
    352A  LEU*     5.1     1.4    -      -       -      +
    363A  ASP*     3.2    26.5    +      -       -      +
    364A  PRO*     3.5    36.1    +      -       +      +
    365A  LYS      3.4     0.6    -      -       -      -
    366A  PHE*     1.3    74.6    -      -       -      +
    368A  ARG*     1.3    60.6    +      -       -      +
    370A  GLY*     3.2     2.2    +      -       -      +
    371A  VAL*     2.8    39.9    +      -       +      +
    433A  LEU*     3.5    44.6    +      -       -      +
    436A  ARG*     3.8     5.8    +      -       -      +
    437A  CYS*     3.4    24.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ARG 368 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276A  SER*     3.7    28.5    +      -       -      +
    278A  LYS*     3.3    54.8    -      -       -      +
    279A  ALA*     4.4     8.7    -      -       +      -
    363A  ASP*     5.1     0.4    +      -       -      -
    366A  PHE*     3.5     0.4    -      -       -      +
    367A  GLN*     1.3    78.9    -      -       -      +
    369A  ALA*     1.3    52.8    +      -       -      +
    371A  VAL*     3.4     6.2    +      -       +      +
    372A  ASN*     2.8    56.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 369 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  PHE*     3.6    31.7    +      -       +      +
    368A  ARG*     1.3    78.1    -      -       -      +
    370A  GLY*     1.3    52.7    +      -       -      +
    372A  ASN*     3.5     7.3    +      -       -      +
    373A  PHE*     2.8    35.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 370 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  PHE      3.1    15.1    +      -       -      -
    367A  GLN      3.2     3.5    +      -       -      -
    369A  ALA*     1.3    72.8    -      -       -      +
    371A  VAL*     1.3    55.8    +      -       -      +
    373A  PHE*     3.3     8.6    +      -       -      +
    374A  LEU*     2.8    35.5    +      -       -      +
    429A  LEU*     3.8     7.1    -      -       -      +
    433A  LEU*     3.8    17.0    -      -       -      -
----------------------------------------------------------
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Residues in contact with VAL 371 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    276A  SER*     5.1     6.7    -      -       -      +
    279A  ALA*     4.3    11.2    -      -       +      -
    280A  LEU*     4.2    20.2    -      -       +      -
    283A  TYR*     2.7    50.2    +      -       +      +
    352A  LEU*     4.4    13.2    -      -       +      +
    367A  GLN*     2.8    37.4    +      -       +      +
    368A  ARG*     3.7     7.0    -      -       -      +
    370A  GLY*     1.3    72.2    -      -       -      +
    372A  ASN*     1.3    52.5    +      -       -      +
    374A  LEU*     3.5     0.5    +      -       -      +
    375A  TYR*     2.8    18.4    +      -       -      +
    433A  LEU*     3.7    20.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ASN 372 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279A  ALA*     3.1    24.2    -      -       -      +
    282A  LYS*     3.8    16.5    +      -       -      +
    368A  ARG*     2.8    45.2    +      -       -      +
    369A  ALA*     3.8     6.5    -      -       -      +
    371A  VAL*     1.3    70.8    -      -       -      +
    373A  PHE*     1.3    56.6    +      -       -      +
    375A  TYR*     3.4    14.3    -      -       +      +
    376A  ILE*     2.8    42.9    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 373 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369A  ALA      2.8    22.1    +      -       -      +
    370A  GLY*     3.3    10.5    -      -       -      +
    372A  ASN*     1.3    71.7    -      -       -      +
    374A  LEU*     1.3    53.2    +      -       -      +
    376A  ILE*     3.4    18.4    -      -       +      +
    377A  ALA*     2.8    37.5    +      -       +      +
    429A  LEU*     3.9    18.8    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 374 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283A  TYR*     4.0    10.1    -      -       +      +
    348A  LEU*     5.5     4.9    -      -       +      -
    352A  LEU*     3.8    13.2    -      -       +      -
    370A  GLY      2.8    19.5    +      -       -      +
    371A  VAL      3.6     5.2    -      -       -      +
    373A  PHE*     1.3    70.8    -      -       -      +
    375A  TYR*     1.3    55.6    +      -       -      +
    377A  ALA*     3.3     5.0    +      -       -      +
    378A  LEU*     2.8    54.4    +      -       +      +
    426A  GLY*     3.8    16.2    -      -       -      +
    429A  LEU*     3.8    15.4    -      -       +      +
    430A  TRP*     3.3    40.6    -      -       +      +
    433A  LEU*     3.6    19.7    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 375 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    279A  ALA      4.6     0.9    -      -       -      -
    282A  LYS*     3.3    38.0    +      -       +      +
    283A  TYR*     3.3    61.8    +      +       +      +
    285A  PHE*     5.6     2.4    -      -       -      -
    286A  LEU*     4.1    23.6    +      -       +      +
    371A  VAL      2.8    22.4    +      -       -      +
    372A  ASN*     3.4    17.0    -      -       +      +
    374A  LEU*     1.3    72.2    -      -       -      +
    376A  ILE*     1.3    73.9    +      -       +      +
    378A  LEU*     3.3     9.0    -      -       -      +
    379A  PHE*     2.8    33.1    +      +       +      +
----------------------------------------------------------
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Residues in contact with ILE 376 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    372A  ASN*     2.8    30.3    +      -       +      +
    373A  PHE*     3.4    24.5    -      -       +      +
    375A  TYR*     1.3    85.2    -      -       +      +
    377A  ALA*     1.3    62.7    +      -       -      +
    379A  PHE*     3.3    14.4    -      -       +      +
    380A  ILE*     2.8    35.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with ALA 377 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  PHE*     2.8    25.1    +      -       +      +
    374A  LEU*     3.5     8.5    -      -       -      +
    376A  ILE*     1.3    72.1    -      -       -      +
    378A  LEU*     1.3    55.5    +      -       +      +
    380A  ILE*     3.3    11.8    -      -       +      +
    381A  VAL*     2.8    44.6    +      -       +      +
    422A  LEU      5.6     2.0    -      -       -      +
    426A  GLY*     5.3     9.2    -      -       -      -
    429A  LEU*     5.6     4.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 378 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    283A  TYR*     5.8     2.9    -      -       +      -
    286A  LEU*     5.4     2.5    -      -       +      -
    341A  PHE*     4.3    23.6    -      -       +      -
    344A  ALA*     5.7     2.9    -      -       +      -
    345A  THR*     3.9    30.1    -      -       +      +
    348A  LEU*     5.3    14.1    -      -       +      -
    374A  LEU*     2.8    38.9    +      -       +      +
    375A  TYR*     3.3    12.3    -      -       -      +
    377A  ALA*     1.3    72.5    -      -       -      +
    379A  PHE*     1.3    56.9    +      -       -      +
    381A  VAL*     3.3     5.8    +      -       +      +
    382A  VAL*     2.8    39.8    +      -       +      +
    423A  LEU*     5.1    14.8    -      -       +      +
    426A  GLY*     4.3    18.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 379 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286A  LEU*     4.7    23.9    -      -       +      +
    375A  TYR*     2.8    26.1    +      +       +      +
    376A  ILE*     3.2    19.5    +      -       +      +
    378A  LEU*     1.3    73.4    -      -       -      +
    380A  ILE*     1.3    71.0    +      -       +      +
    382A  VAL*     3.5     6.0    -      -       +      +
    383A  GLY*     2.8    27.9    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 380 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    376A  ILE*     2.8    24.3    +      -       +      +
    377A  ALA*     3.3    16.4    -      -       +      +
    379A  PHE*     1.3    80.5    -      -       +      +
    381A  VAL*     1.3    64.2    +      -       +      +
    383A  GLY*     4.5     1.1    -      -       -      +
    384A  GLY*     2.8    30.7    +      -       -      +
    418A  PHE*     6.3     0.2    -      -       +      -
    419A  TRP*     3.8    11.1    -      -       +      -
    422A  LEU*     4.7    19.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with VAL 381 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    341A  PHE*     3.7    22.9    -      -       +      -
    377A  ALA*     2.8    27.6    +      -       +      +
    378A  LEU*     3.7     7.2    -      -       +      +
    380A  ILE*     1.3    71.3    -      -       +      +
    382A  VAL*     1.3    52.0    +      -       -      +
    385A  SER*     2.8    42.3    +      -       -      -
    415A  LEU*     5.9     0.2    -      -       +      -
    419A  TRP*     3.7    26.1    -      -       +      +
    422A  LEU*     3.4    46.4    -      -       +      +
    423A  LEU*     3.7    13.9    -      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 382 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    286A  LEU*     5.7     4.7    -      -       +      -
    290A  LEU*     4.0    22.0    -      -       +      -
    341A  PHE*     3.3    45.1    -      -       +      -
    345A  THR*     5.6     2.2    -      -       +      -
    378A  LEU*     2.8    38.5    +      -       +      +
    379A  PHE*     3.5     6.5    -      -       +      +
    381A  VAL*     1.3    71.4    -      -       -      +
    383A  GLY*     1.3    63.0    +      -       -      +
    385A  SER*     2.7    18.0    +      -       -      -
    386A  TYR*     3.3    41.1    -      -       +      +
----------------------------------------------------------
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Residues in contact with GLY 383 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379A  PHE*     2.8    19.8    +      -       -      -
    380A  ILE*     4.1     0.7    -      -       -      -
    382A  VAL*     1.3    75.2    -      -       -      +
    384A  GLY*     1.3    52.3    +      -       -      +
    386A  TYR*     3.4    16.4    +      -       -      -
    387A  ALA*     2.8    37.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 384 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    380A  ILE*     2.8    22.0    +      -       -      +
    383A  GLY*     1.3    70.7    -      -       -      -
    385A  SER*     1.3    55.4    +      -       -      +
    387A  ALA*     3.7     7.5    -      -       -      +
    388A  GLY      2.8    24.8    +      -       -      -
    419A  TRP*     3.3    32.2    -      -       -      -
----------------------------------------------------------
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Residues in contact with SER 385 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    337A  GLN*     4.5     0.7    -      -       -      +
    341A  PHE*     3.5    15.6    -      -       -      -
    381A  VAL      2.8    21.4    +      -       -      -
    382A  VAL      2.7    22.9    +      -       -      -
    384A  GLY*     1.3    72.8    -      -       -      +
    386A  TYR*     1.3    62.0    +      -       -      +
    388A  GLY*     3.3     2.1    +      -       -      -
    389A  ASN*     2.9    29.6    +      -       -      +
    405A  PHE      4.2     0.3    -      -       -      +
    415A  LEU*     3.5    28.6    -      -       -      +
    416A  GLY      4.3     0.5    +      -       -      -
    419A  TRP*     3.4    24.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with TYR 386 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    290A  LEU*     4.2    13.3    -      -       +      +
    293A  VAL*     5.6     2.3    -      -       +      +
    334A  TRP*     2.8    57.4    +      +       +      -
    337A  GLN*     3.9    24.5    -      -       +      -
    338A  SER*     4.5    15.4    +      -       -      -
    341A  PHE*     4.6     3.6    -      +       -      -
    382A  VAL*     3.3    44.6    -      -       +      +
    383A  GLY*     3.4    15.8    +      -       -      -
    385A  SER*     1.3    78.9    +      -       -      +
    387A  ALA*     1.3    56.4    +      -       -      +
    389A  ASN*     3.7    13.0    -      -       -      +
    390A  PHE*     2.8    25.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 387 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    334A  TRP*     5.4     0.4    -      -       -      -
    383A  GLY      2.8    20.7    +      -       -      +
    384A  GLY*     3.7     9.2    -      -       -      +
    386A  TYR*     1.3    76.3    -      -       -      +
    388A  GLY*     1.3    59.4    +      -       -      +
    390A  PHE*     3.0    11.8    -      -       +      +
    391A  PHE*     2.8    45.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with GLY 388 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384A  GLY      2.8    17.3    +      -       -      -
    385A  SER      3.3     2.0    +      -       -      -
    387A  ALA*     1.3    68.7    -      -       -      +
    389A  ASN*     1.3    54.5    +      -       -      +
    391A  PHE*     3.2     9.4    +      -       -      +
    392A  ALA      2.8    31.0    +      -       -      -
    397A  LEU*     6.0     0.4    -      -       -      -
    405A  PHE*     3.5    20.9    -      -       -      -
    406A  GLY*     3.2    18.0    -      -       -      -
    419A  TRP*     4.7     1.6    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 389 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    330A  LEU*     3.5     2.7    -      -       -      -
    333A  THR*     3.4    37.6    +      -       -      +
    334A  TRP*     4.0     1.3    -      -       -      +
    337A  GLN*     5.0     1.8    -      -       -      +
    385A  SER      2.9    15.6    +      -       -      +
    386A  TYR*     3.5    17.1    -      -       -      +
    388A  GLY*     1.3    73.0    -      -       -      +
    390A  PHE*     1.3    58.6    +      -       -      +
    393A  LEU*     2.8    41.4    +      -       +      +
    406A  GLY      3.7     2.8    -      -       -      +
    407A  HIS*     3.4    19.8    +      -       -      +
    414A  ASP*     3.1    37.2    +      -       -      +
    415A  LEU*     3.8     2.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with PHE 390 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    325A  TRP*     3.5    52.5    -      +       +      -
    326A  PHE*     3.7    20.9    -      +       -      -
    330A  LEU*     3.5    24.7    -      -       +      +
    334A  TRP*     3.8    15.7    -      +       +      -
    386A  TYR      2.8    18.6    +      -       -      +
    387A  ALA*     3.0    15.7    -      -       +      +
    389A  ASN*     1.3    74.8    -      -       -      +
    391A  PHE*     1.3    81.9    +      +       -      +
    394A  THR*     2.7    35.3    +      -       -      +
    396A  ILE*     4.8     3.4    -      -       +      -
----------------------------------------------------------
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Residues in contact with PHE 391 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    387A  ALA*     2.8    40.1    +      -       +      +
    388A  GLY*     3.2     8.0    +      -       -      +
    390A  PHE*     1.3    96.7    -      +       -      +
    392A  ALA*     1.3    59.3    +      -       -      +
    394A  THR*     3.5     7.3    +      -       -      -
    396A  ILE*     2.8    53.1    +      -       +      +
    397A  LEU*     4.7    14.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with ALA 392 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     63A  THR*     3.7    18.0    -      -       -      +
     64A  THR*     5.1     1.6    -      -       -      +
    388A  GLY      2.8     9.9    +      -       -      -
    391A  PHE*     1.3    70.5    -      -       -      +
    393A  LEU*     1.3    60.3    +      -       -      +
    394A  THR      3.2     2.0    -      -       -      -
    395A  HIS*     2.8    23.5    +      -       -      +
    397A  LEU*     3.7    18.2    -      -       +      -
    402A  ASN*     3.7    12.6    -      -       +      +
    406A  GLY*     3.5    11.2    -      -       -      -
    407A  HIS      3.4    27.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 393 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
     64A  THR      3.1    33.1    -      -       -      +
     65A  GLY*     3.9    16.4    -      -       -      +
    327A  PRO*     5.1     5.6    -      -       +      +
    329A  ALA*     3.8    28.3    -      -       +      +
    330A  LEU*     3.4    28.9    -      -       +      -
    333A  THR*     3.5    33.4    -      -       +      +
    389A  ASN*     2.8    26.5    +      -       +      +
    392A  ALA*     1.3    72.3    -      -       -      +
    394A  THR*     1.3    58.1    +      -       -      +
    395A  HIS*     3.3     1.2    +      -       -      +
    407A  HIS*     3.8    13.2    -      -       +      +
----------------------------------------------------------
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Residues in contact with THR 394 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    324A  ASP      3.1    27.1    -      -       -      +
    325A  TRP*     3.6    21.1    -      -       +      +
    327A  PRO*     4.2    11.0    -      -       +      -
    330A  LEU*     4.6     1.6    -      -       +      -
    390A  PHE*     2.7    24.5    +      -       +      +
    391A  PHE      3.5     0.7    +      -       -      -
    393A  LEU*     1.3    77.0    -      -       -      +
    395A  HIS*     1.3    69.1    +      -       -      +
    396A  ILE*     3.2    28.6    -      -       +      +
----------------------------------------------------------
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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