4CY6

apo structure of 2-hydroxybiphenyl 3-monooxygenase HbpA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.76 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of the Apo and Fad-Bound Forms of 2-Hydroxybiphenyl 3-Monooxygenase (Hbpa) Locate Activity Hotspots Identified by Using Directed Evolution.

Jensen, C.N.Mielke, T.Farrugia, J.E.Frank, A.Man, H.Hart, S.Turkenburg, J.P.Grogan, G.

(2015) Chembiochem 16: 968

  • DOI: 10.1002/cbic.201402701
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The FAD-dependent monooxygenase HbpA from Pseudomonas azelaica HBP1 catalyses the hydroxylation of 2-hydroxybiphenyl (2HBP) to 2,3-dihydroxybiphenyl (23DHBP). HbpA has been used extensively as a model for studying flavoprotein hydroxylases under proc ...

    The FAD-dependent monooxygenase HbpA from Pseudomonas azelaica HBP1 catalyses the hydroxylation of 2-hydroxybiphenyl (2HBP) to 2,3-dihydroxybiphenyl (23DHBP). HbpA has been used extensively as a model for studying flavoprotein hydroxylases under process conditions, and has also been subjected to directed-evolution experiments that altered its catalytic properties. The structure of HbpA has been determined in its apo and FAD-complex forms to resolutions of 2.76 and 2.03 Å, respectively. Comparisons of the HbpA structure with those of homologues, in conjunction with a model of the reaction product in the active site, reveal His48 as the most likely acid/base residue to be involved in the hydroxylation mechanism. Mutation of His48 to Ala resulted in an inactive enzyme. The structures of HbpA also provide evidence that mutants achieved by directed evolution that altered activity are comparatively remote from the substrate-binding site.


    Organizational Affiliation

    York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK).



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
2-HYDROXYBIPHENYL-3-MONOOXYGENASE
A, B, C, D
586Pseudomonas nitroreducens HBP1Mutation(s): 1 
EC: 1.14.13.44
Find proteins for O06647 (Pseudomonas nitroreducens)
Go to UniProtKB:  O06647
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.76 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.193 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.35α = 115.03
b = 94.67β = 96.09
c = 99.16γ = 109.59
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
SCALAdata scaling
BALBESphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-03-18
    Type: Initial release
  • Version 1.1: 2015-04-22
    Changes: Database references