3GWF

Open crystal structure of cyclohexanone monooxygenase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.188 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structures of cyclohexanone monooxygenase reveal complex domain movements and a sliding cofactor

Mirza, I.A.Yachnin, B.J.Wang, S.Grosse, S.Bergeron, H.Imura, A.Iwaki, H.Hasegawa, Y.Lau, P.C.Berghuis, A.M.

(2009) J Am Chem Soc 131: 8848-8854

  • DOI: https://doi.org/10.1021/ja9010578
  • Primary Citation of Related Structures:  
    3GWD, 3GWF

  • PubMed Abstract: 

    Cyclohexanone monooxygenase (CHMO) is a flavoprotein that carries out the archetypical Baeyer-Villiger oxidation of a variety of cyclic ketones into lactones. Using NADPH and O(2) as cosubstrates, the enzyme inserts one atom of oxygen into the substrate in a complex catalytic mechanism that involves the formation of a flavin-peroxide and Criegee intermediate. We present here the atomic structures of CHMO from an environmental Rhodococcus strain bound with FAD and NADP(+) in two distinct states, to resolutions of 2.3 and 2.2 A. The two conformations reveal domain shifts around multiple linkers and loop movements, involving conserved arginine 329 and tryptophan 492, which effect a translation of the nicotinamide resulting in a sliding cofactor. Consequently, the cofactor is ideally situated and subsequently repositioned during the catalytic cycle to first reduce the flavin and later stabilize formation of the Criegee intermediate. Concurrent movements of a loop adjacent to the active site demonstrate how this protein can effect large changes in the size and shape of the substrate binding pocket to accommodate a diverse range of substrates. Finally, the previously identified BVMO signature sequence is highlighted for its role in coordinating domain movements. Taken together, these structures provide mechanistic insights into CHMO-catalyzed Baeyer-Villiger oxidation.


  • Organizational Affiliation

    Department of Biochemistry, McGill University, 3649 Prom Sir William Osler, Bellini Pavilion, Room 466, Montreal, QC, Canada H3G 0B1.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclohexanone monooxygenase540Rhodococcus sp. HI-31Mutation(s): 0 
Gene Names: chnBchnB1
EC: 1.14.13.22
UniProt
Find proteins for C0STX7 (Rhodococcus sp. HI-31)
Explore C0STX7 
Go to UniProtKB:  C0STX7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC0STX7
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
B [auth A]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
NAP
Query on NAP

Download Ideal Coordinates CCD File 
C [auth A]NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.279α = 90
b = 66.958β = 90
c = 135.996γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-05-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Source and taxonomy, Version format compliance
  • Version 1.2: 2018-02-07
    Changes: Experimental preparation
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description