DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: MMOD-induced structural changes of hydroxylase in soluble methane monooxygenase

Journal Article · · Science Advances

Soluble methane monooxygenase in methanotrophs converts methane to methanol under ambient conditions. The maximum catalytic activity of hydroxylase (MMOH) is achieved through the interplay of its regulatory protein (MMOB) and reductase. An additional auxiliary protein, MMOD, functions as an inhibitor of MMOH; however, its inhibitory mechanism remains unknown. Here, we report the crystal structure of the MMOH-MMOD complex from Methylosinus sporium strain 5 (2.6 Å). Its structure illustrates that MMOD associates with the canyon region of MMOH where MMOB binds. Although MMOD and MMOB recognize the same binding site, each binding component triggers different conformational changes toward MMOH, which then respectively lead to the inhibition and activation of MMOH. Particularly, MMOD binding perturbs the di-iron geometry by inducing two major MMOH conformational changes, i.e., MMOH β subunit disorganization and subsequent His147 dissociation with Fe1 coordination. Furthermore, 1,6-hexanediol, a mimic of the products of sMMO, reveals the substrate access route.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Research Foundation of Korea (NRF); The Biomedical Research Council (BMRC)
Grant/Contract Number:
NRF-2015M3D3A1A01064876; R01 DK111465
OSTI ID:
1593446
Journal Information:
Science Advances, Vol. 5, Issue 10; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

References (62)

New findings in methane-utilizing bacteria highlight their importance in the biosphere and their commercial potential journal August 1980
Oxidation-reduction potentials of the methane monooxygenase hydroxylase component from Methylosinus trichosporium OB3b journal January 1994
Copper-dependent reciprocal transcriptional regulation of methane monooxygenase genes in Methylococcus capsulatus and Methylosinus trichosporium journal July 1997
PARP1 exhibits enhanced association and catalytic efficiency with γH2A.X-nucleosome journal December 2019
NMR Structure of the Flavin Domain from Soluble Methane Monooxygenase Reductase from Methylococcus capsulatus (Bath) dataset January 2004
Preparation and X-ray Structures of Metal-Free, Dicobalt and Dimanganese Forms of Soluble Methane Monooxygenase Hydroxylase from Methylococcus capsulatus (Bath) † journal December 2004
NMR Structure of the [2Fe-2S] Ferredoxin Domain from Soluble Methane Monooxygenase Reductase and Interaction with Its Hydroxylase † , ‡ journal January 2002
NMR Structure of the Amino-Terminal Domain of the Lambda Integrase Protein in Complex with DNA: Immobilization of a Flexible Tail Facilitates Beta-Sheet Recognition of the Major Groove journal May 2009
Control of substrate access to the active site in methane monooxygenase journal February 2013
MolProbity : all-atom structure validation for macromolecular crystallography journal December 2009
NMR Structure of the [2Fe-2S] Ferredoxin Domain from Soluble Methane Monooxygenase Reductase and Interaction with its Hydroxylase dataset January 2002
Methanobactin and MmoD work in concert to act as the ‘copper-switch’ in methanotrophs: Copper-switch in methanotrophy journal May 2013
NMR Structure of the Flavin Domain from Soluble Methane Monooxygenase Reductase from Methylococcus capsulatus (Bath) † , ‡ journal September 2004
High-Energy-Resolution Fluorescence-Detected X-ray Absorption of the Q Intermediate of Soluble Methane Monooxygenase journal November 2017
Crystal structure of a bacterial non-haem iron hydroxylase that catalyses the biological oxidation of methane journal December 1993
Structure of the soluble methane monooxygenase regulatory protein B journal July 1999
Features and development of Coot journal March 2010
Protein production by auto-induction in high-density shaking cultures journal May 2005
Structure of the key species in the enzymatic oxidation of methane to methanol journal January 2015
Dioxygen Activation by Enzymes Containing Binuclear Non-Heme Iron Clusters journal January 1996
Exploring the gas access routes in a [NiFeSe] hydrogenase using crystals pressurized with krypton and oxygen journal August 2020
Methane monooxygenase component B and reductase alter the regioselectivity of the hydroxylase component-catalyzed reactions. A novel role for protein-protein interactions in an oxygenase mechanism. journal September 1992
Why OrfY?: CHARACTERIZATION OF MMOD, A LONG OVERLOOKED COMPONENT OF THE SOLUBLE METHANE MONOOXYGENASE FROM journal November 2001
Methanobactin and the Link between Copper and Bacterial Methane Oxidation journal March 2016
Towards automated crystallographic structure refinement with phenix.refine journal March 2012
Product Bound Structures of the Soluble Methane Monooxygenase Hydroxylase from Methylococcus capsulatus (Bath):  Protein Motion in the α-Subunit journal April 2005
The relationship of biomass, polysaccharide and H2 formation in the wild-type and nifA/nifB mutants of Rhodobacter capsulatus journal April 1991
Secondary-structure matching (SSM), a new tool for fast protein structure alignment in three dimensions journal November 2004
Dioxygen Activation and Methane Hydroxylation by Soluble Methane Monooxygenase: A Tale of Two Irons and Three Proteins journal August 2001
Electron Transfer Control in Soluble Methane Monooxygenase journal June 2014
Electron-Transfer Reactions of the Reductase Component of Soluble Methane Monooxygenase from Methylococcus capsulatus (Bath) † journal December 2001
Enzymatic Oxidation of Methane journal March 2015
Sequencing and analysis of the Methylococcus capsulatus (Bath) soluble methane monooxygenase genes: Sequencing and analysis of sMMO genes journal April 2000
Crystal structure of the hydroxylase component of methane monooxygenase from Methylosinus trichosporium OB3b journal March 1997
Alkane Oxidation: Methane Monooxygenases, Related Enzymes, and Their Biomimetics journal February 2017
Dioxygen Activation by Nonheme Diiron Enzymes: Diverse Dioxygen Adducts, High-Valent Intermediates, and Related Model Complexes journal December 2017
FEM: feature-enhanced map journal February 2015
Reactions of the Peroxo Intermediate of Soluble Methane Monooxygenase Hydroxylase with Ethers journal May 2005
Methanotrophic bacteria. journal January 1996
An optimized growth medium for increased recombinant protein secretion titer via the type III secretion system journal February 2021
Dioxygen Activation in Soluble Methane Monooxygenase journal April 2011
Phaser crystallographic software journal July 2007
Structure of the Soluble Methane Monooxygenase Regulatory Protein B dataset January 2003
The methane monooxygenase gene cluster of Methylosinus trichosporium: cloning and sequencing of the mmoC gene journal November 1991
NMR Structure of the Amino-Terminal Domain of the Lambda Integrase Protein in Complex with DNA: Immobilization of a Flexible Tail Facilitates Beta-Sheet Recognition of the Major Groove journal May 2009
Protein production by auto-induction in high-density shaking cultures journal May 2005
Mutational and structural analyses of the regulatory protein B of soluble methane monooxygenase from Methylococcus capsulatus (Bath) journal July 1999
Enzymatic Oxidation of Methane journal March 2015
Alkane Oxidation: Methane Monooxygenases, Related Enzymes, and Their Biomimetics journal February 2017
Dioxygen Activation by Nonheme Diiron Enzymes: Diverse Dioxygen Adducts, High-Valent Intermediates, and Related Model Complexes journal December 2017
Dioxygen Activation in Soluble Methane Monooxygenase journal April 2011
Oxidation-reduction potentials of the methane monooxygenase hydroxylase component from Methylosinus trichosporium OB3b journal January 1994
NMR Structure of the Flavin Domain from Soluble Methane Monooxygenase Reductase from Methylococcus capsulatus (Bath) † , ‡ journal September 2004
Dioxygen Activation by Enzymes Containing Binuclear Non-Heme Iron Clusters journal January 1996
Product Bound Structures of the Soluble Methane Monooxygenase Hydroxylase from Methylococcus capsulatus (Bath):  Protein Motion in the α-Subunit journal April 2005
Reactions of the Peroxo Intermediate of Soluble Methane Monooxygenase Hydroxylase with Ethers journal May 2005
Electron Transfer Control in Soluble Methane Monooxygenase journal June 2014
High-Energy-Resolution Fluorescence-Detected X-ray Absorption of the Q Intermediate of Soluble Methane Monooxygenase journal November 2017
New findings in methane-utilizing bacteria highlight their importance in the biosphere and their commercial potential journal August 1980
Copper-dependent reciprocal transcriptional regulation of methane monooxygenase genes in Methylococcus capsulatus and Methylosinus trichosporium journal July 1997
Structure of the soluble methane monooxygenase regulatory protein B journal July 1999
Domain Engineering of the Reductase Component of Soluble Methane Monooxygenase from Methylococcus capsulatus (Bath) journal November 2003