Contacts of the helix formed by residues 365 - 398 (chain A) in PDB entry 6W4E


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 LYS 365 (chain A).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361A  SER*     2.7    28.7    +      -       -      +
    364A  ALA*     1.3    81.3    -      -       +      +
    366A  PRO*     1.4    63.9    -      -       +      +
    367A  ALA      3.5     0.2    -      -       -      -
    369A  GLU*     2.8    39.5    +      -       -      +
    372A  ARG*     4.6     3.0    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 366 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    361A  SER      3.1    16.2    -      -       -      +
    362A  GLU*     3.2    32.8    -      -       +      +
    365A  LYS*     1.4    90.1    -      -       +      +
    367A  ALA*     1.3    56.5    +      -       -      +
    369A  GLU*     3.3     9.9    +      -       +      +
    370A  ASP*     2.8    30.6    +      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 367 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    362A  GLU      2.8    23.0    +      -       -      +
    363A  LYS*     3.4    15.9    -      -       +      +
    366A  PRO*     1.3    73.0    -      -       -      +
    368A  LEU*     1.3    57.0    +      -       -      +
    370A  ASP*     3.2     8.1    +      -       -      +
    371A  LEU*     2.8    40.5    +      -       +      +
    407D  SER*     5.4     9.6    -      -       -      +
    411D  THR*     4.2    17.5    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 368 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363A  LYS      3.2    14.3    +      -       -      +
    364A  ALA*     3.1    38.4    -      -       +      +
    365A  LYS      3.5     0.4    +      -       -      -
    366A  PRO      3.3     0.6    -      -       -      -
    367A  ALA*     1.3    77.6    -      -       -      +
    369A  GLU*     1.3    57.8    +      -       -      +
    371A  LEU*     3.2    15.6    +      -       +      +
    372A  ARG*     2.8    61.2    +      -       +      +
    416A  17F      3.8    32.1    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 369 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    365A  LYS      2.8    24.4    +      -       -      +
    366A  PRO*     3.5     9.0    -      -       -      +
    368A  LEU*     1.3    71.5    -      -       -      +
    370A  ASP*     1.3    57.8    +      -       -      +
    372A  ARG*     3.2    19.8    +      -       +      +
    373A  GLN*     2.9    54.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with ASP 370 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    366A  PRO      2.8    18.0    +      -       -      +
    367A  ALA*     3.3     9.2    -      -       -      +
    369A  GLU*     1.3    77.6    +      -       -      +
    371A  LEU*     1.3    57.9    +      -       -      +
    373A  GLN*     3.3    17.2    +      -       -      +
    374A  GLY*     2.9    24.4    +      -       -      -
    403D  ASP      4.2     6.1    -      -       -      +
    404D  ASN*     5.1     1.0    +      -       -      -
    407D  SER*     2.6    31.2    +      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 371 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    363A  LYS      5.6     0.9    -      -       -      +
    367A  ALA*     2.8    30.4    +      -       +      +
    368A  LEU*     3.2    24.2    +      -       +      +
    370A  ASP*     1.3    75.8    -      -       -      +
    372A  ARG*     1.3    54.2    +      -       +      +
    374A  GLY*     3.1     2.2    +      -       -      -
    375A  LEU*     2.8    49.0    +      -       +      +
    416A  17F      4.6    26.5    -      -       +      -
    404D  ASN*     3.6    26.5    -      -       -      +
    407D  SER*     5.1    12.3    -      -       -      +
    408D  VAL*     6.1     2.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with ARG 372 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    364A  ALA      3.9     5.9    +      -       -      -
    365A  LYS*     4.6     3.0    +      -       -      +
    368A  LEU*     2.8    61.3    +      -       +      +
    369A  GLU*     3.2    26.4    +      -       -      +
    371A  LEU*     1.3    72.2    -      -       -      +
    373A  GLN*     1.3    58.7    +      -       +      +
    375A  LEU*     3.1    10.4    +      -       +      +
    376A  LEU*     2.9    39.7    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLN 373 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    369A  GLU*     2.9    43.1    +      -       +      +
    370A  ASP*     3.5    20.5    -      -       -      +
    372A  ARG*     1.3    76.6    -      -       +      +
    374A  GLY*     1.3    58.0    +      -       -      +
    376A  LEU*     3.6    18.4    +      -       +      +
    377A  PRO*     2.9    23.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 374 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    370A  ASP      2.9    14.5    +      -       -      -
    371A  LEU*     3.1     4.7    +      -       -      -
    373A  GLN*     1.3    77.2    -      -       -      +
    375A  LEU*     1.3    60.0    +      -       -      +
    376A  LEU      3.3     0.2    -      -       -      -
    377A  PRO*     3.4    12.6    -      -       -      +
    378A  VAL*     3.1    22.9    -      -       -      +
    400D  LYS*     5.1     6.3    -      -       -      -
    404D  ASN*     6.3     0.9    -      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 375 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    371A  LEU*     2.8    27.7    +      -       +      +
    372A  ARG*     3.1    10.1    +      -       +      +
    374A  GLY*     1.3    76.2    -      -       -      +
    376A  LEU*     1.3    61.5    +      -       -      +
    377A  PRO      3.5     0.2    -      -       -      -
    378A  VAL*     3.2    22.3    +      -       +      +
    379A  LEU*     2.8    43.8    +      -       +      +
    416A  17F      4.4    26.9    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 376 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    372A  ARG*     2.9    28.0    +      -       +      +
    373A  GLN*     3.7    19.5    -      -       +      +
    375A  LEU*     1.3    77.3    -      -       -      +
    377A  PRO*     1.4    68.9    -      -       +      +
    379A  LEU*     3.2    12.7    +      -       +      +
    380A  GLU*     3.0    24.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 377 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    373A  GLN      2.9    28.5    -      -       -      +
    374A  GLY*     3.4    15.0    -      -       -      +
    376A  LEU*     1.4    81.6    -      -       +      +
    378A  VAL*     1.3    51.5    +      -       -      -
    380A  GLU*     3.2    12.1    +      -       +      +
    381A  SER*     2.8    37.4    +      -       -      -
    400D  LYS*     4.4    25.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with VAL 378 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    374A  GLY      3.1    22.2    -      -       -      +
    375A  LEU*     3.2    27.1    +      -       +      +
    376A  LEU      3.1     0.4    -      -       -      -
    377A  PRO*     1.3    79.5    -      -       +      +
    379A  LEU*     1.3    62.6    +      -       +      +
    381A  SER*     2.9     8.5    +      -       -      -
    382A  PHE*     2.8    54.1    +      -       +      +
    400D  LYS*     5.2    10.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 379 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    375A  LEU*     2.8    28.5    +      -       +      +
    376A  LEU*     3.6    12.1    -      -       +      +
    378A  VAL*     1.3    80.9    -      -       +      +
    380A  GLU*     1.3    53.6    +      -       -      +
    382A  PHE*     3.7     8.8    -      -       +      +
    383A  LYS*     2.8    58.6    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 380 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    376A  LEU      3.0    16.4    +      -       -      +
    377A  PRO*     3.2    15.3    -      -       +      +
    379A  LEU*     1.3    79.4    -      -       -      +
    381A  SER*     1.3    61.9    +      -       -      +
    383A  LYS*     3.4    20.9    +      -       -      +
    384A  VAL*     3.3    23.9    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 381 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    377A  PRO      2.8    18.3    +      -       -      -
    378A  VAL*     2.9    14.6    +      -       -      -
    380A  GLU*     1.3    72.6    -      -       -      +
    382A  PHE*     1.3    61.3    +      -       -      +
    384A  VAL*     3.1    11.3    +      -       -      +
    385A  SER*     2.9    31.6    +      -       -      -
    400D  LYS*     5.6     2.1    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 382 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    378A  VAL*     2.8    44.6    +      -       +      +
    379A  LEU*     3.7    12.6    -      -       +      +
    381A  SER*     1.3    79.1    +      -       -      +
    383A  LYS*     1.3    53.0    +      -       -      +
    385A  SER*     3.2     9.6    +      -       -      -
    386A  PHE*     2.7    75.3    +      +       +      -
    415A  17F      4.9    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LYS 383 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    379A  LEU*     2.8    45.5    +      -       +      +
    380A  GLU*     3.5    20.1    +      -       +      +
    382A  PHE*     1.3    76.7    -      -       -      +
    384A  VAL*     1.3    57.6    +      -       +      +
    386A  PHE*     3.7     8.0    -      -       +      +
    387A  LEU*     2.9    43.2    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 384 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    380A  GLU      3.3    17.3    -      -       -      +
    381A  SER*     3.1    10.0    +      -       -      +
    383A  LYS*     1.3    75.5    -      -       +      +
    385A  SER*     1.3    53.1    +      -       -      +
    387A  LEU*     3.3    10.9    +      -       +      +
    388A  SER*     2.7    41.7    +      -       -      +
----------------------------------------------------------
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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
----------------------------------------------------------
    381A  SER*     2.9    15.7    +      -       -      -
    382A  PHE*     3.5    15.5    -      -       -      -
    384A  VAL*     1.3    77.4    -      -       -      +
    386A  PHE*     1.3    58.8    +      -       -      +
    388A  SER*     3.0     7.7    +      -       -      -
    389A  ALA*     2.9    30.8    +      -       -      +
    594D  LYS*     5.4     4.2    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 386 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    382A  PHE*     2.7    59.3    +      +       +      +
    383A  LYS*     3.7     7.9    -      -       +      +
    385A  SER*     1.3    75.6    -      -       -      +
    387A  LEU*     1.3    57.9    +      -       +      +
    389A  ALA*     3.3     7.7    +      -       +      +
    390A  LEU*     2.9    41.8    +      -       +      +
    415A  17F      4.0    26.0    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 387 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    383A  LYS*     2.9    33.4    +      -       +      +
    384A  VAL*     3.7     8.3    -      -       +      +
    385A  SER      3.3     0.2    -      -       -      -
    386A  PHE*     1.3    77.2    -      -       +      +
    388A  SER*     1.3    63.1    +      -       -      +
    390A  LEU*     3.3    18.5    +      -       +      +
    391A  GLU*     3.1    30.5    +      -       -      +
----------------------------------------------------------
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Residues in contact with SER 388 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    384A  VAL*     2.7    27.8    +      -       -      +
    385A  SER*     3.0    15.8    +      -       -      -
    387A  LEU*     1.3    75.5    -      -       -      +
    389A  ALA*     1.3    50.5    +      -       -      +
    391A  GLU*     3.3    14.4    +      -       -      +
    392A  GLU*     2.7    40.3    +      -       -      +
    594D  LYS*     3.8    36.0    -      -       -      +
----------------------------------------------------------
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Residues in contact with ALA 389 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    385A  SER      2.9    19.6    +      -       -      +
    386A  PHE*     3.5    10.1    -      -       +      +
    388A  SER*     1.3    74.2    -      -       -      +
    390A  LEU*     1.3    60.8    +      -       +      +
    392A  GLU*     3.2     7.3    +      -       -      +
    393A  TYR*     2.9    47.5    +      -       +      -
    591D  TYR*     5.6     1.6    -      -       +      -
    594D  LYS*     5.4     1.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 390 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    386A  PHE*     2.9    32.0    +      -       +      +
    387A  LEU*     3.3    20.4    +      -       +      +
    389A  ALA*     1.3    76.1    -      -       +      +
    391A  GLU*     1.3    59.9    +      -       +      +
    393A  TYR*     3.6     4.8    +      -       -      +
    394A  THR*     2.7    33.9    +      -       -      +
    414A  PCW      5.7    10.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with GLU 391 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    387A  LEU*     3.1    17.3    +      -       -      +
    388A  SER*     3.6    13.1    -      -       -      +
    390A  LEU*     1.3    75.7    -      -       +      +
    392A  GLU*     1.3    55.2    +      -       -      +
    394A  THR*     3.1     5.3    +      -       -      -
    395A  LYS*     2.7    55.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 392 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    388A  SER      2.7    28.8    +      -       -      +
    389A  ALA*     3.5     7.2    -      -       -      +
    391A  GLU*     1.3    74.1    -      -       -      +
    393A  TYR*     1.3    61.8    +      -       -      +
    395A  LYS*     2.7    19.3    +      -       -      +
    396A  LYS*     2.6    61.0    +      -       -      +
    587D  ALA      4.9     0.5    -      -       -      +
    590D  GLU*     3.2    13.4    -      -       -      +
    591D  TYR*     3.5    33.1    +      -       +      -
    594D  LYS*     2.6    39.1    +      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 393 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    389A  ALA*     2.9    35.6    +      -       +      +
    390A  LEU*     3.9     5.6    -      -       -      +
    392A  GLU*     1.3    76.5    -      -       -      +
    394A  THR*     1.3    58.8    +      -       -      +
    396A  LYS*     5.4     0.2    -      -       -      -
    397A  LEU*     2.8    62.4    +      -       +      +
    414A  PCW      5.9    12.2    -      -       +      +
    421A  PCW      5.0    16.9    -      -       +      +
    591D  TYR*     3.4    31.3    -      +       -      -
----------------------------------------------------------
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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
----------------------------------------------------------
    390A  LEU      2.7    22.8    +      -       -      -
    391A  GLU*     3.1     5.6    +      -       -      -
    393A  TYR*     1.3    78.6    -      -       -      +
    395A  LYS*     1.3    62.4    +      -       -      +
    397A  LEU*     5.2     0.4    -      -       -      -
    398A  ASN*     3.0    49.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 395 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    391A  GLU*     2.7    36.7    +      -       +      +
    392A  GLU*     2.7    42.3    +      -       -      +
    394A  THR*     1.3    75.1    -      -       +      +
    396A  LYS*     1.3    67.8    +      -       +      +
    398A  ASN      4.2     6.9    -      -       -      +
    590D  GLU*     2.8    25.1    +      -       -      +
    594D  LYS*     4.1     2.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 396 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    392A  GLU*     2.6    44.5    +      -       -      +
    393A  TYR*     4.6     0.7    -      -       -      +
    395A  LYS*     1.3    87.4    -      -       +      +
    397A  LEU*     1.3    70.7    +      -       +      +
    398A  ASN      3.4     4.4    +      -       -      +
    583D  SER*     3.6    34.6    -      -       -      +
    586D  SER*     2.9    39.4    +      -       -      +
    587D  ALA*     3.7    14.5    -      -       +      +
    590D  GLU*     2.6    24.8    +      -       -      +
    591D  TYR*     5.3     4.3    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 397 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    393A  TYR*     2.8    54.1    +      -       +      +
    394A  THR*     5.2     0.2    -      -       -      -
    396A  LYS*     1.3    80.6    -      -       +      +
    398A  ASN*     1.3    61.0    +      -       -      +
    591D  TYR*     6.0     0.7    -      -       -      +
----------------------------------------------------------
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Residues in contact with ASN 398 (chain A). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    394A  THR*     3.0    39.9    +      -       +      +
    395A  LYS      4.2     7.1    -      -       -      +
    396A  LYS      4.2     5.2    -      -       -      +
    397A  LEU*     1.3    82.9    -      -       -      +
----------------------------------------------------------
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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