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7s4l

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CryoEM structure of Methylotuvimicrobium alcaliphilum 20Z pMMO in a POPC nanodisc at 2.46 Angstrom resolution

Structural highlights

7s4l is a 9 chain structure with sequence from Methylotuvimicrobium alcaliphilum 20Z. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 2.46Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

G4SZ64_META2

Publication Abstract from PubMed

Bacterial methane oxidation using the enzyme particulate methane monooxygenase (pMMO) contributes to the removal of environmental methane, a potent greenhouse gas. Crystal structures determined using inactive, detergent-solubilized pMMO lack several conserved regions neighboring the proposed active site. We show that reconstituting pMMO in nanodiscs with lipids extracted from the native organism restores methane oxidation activity. Multiple nanodisc-embedded pMMO structures determined by cryo-electron microscopy to 2.14- to 2.46-angstrom resolution reveal the structure of pMMO in a lipid environment. The resulting model includes stabilizing lipids, regions of the PmoA and PmoC subunits not observed in prior structures, and a previously undetected copper-binding site in the PmoC subunit with an adjacent hydrophobic cavity. These structures provide a revised framework for understanding and engineering pMMO function.

Recovery of particulate methane monooxygenase structure and activity in a lipid bilayer.,Koo CW, Tucci FJ, He Y, Rosenzweig AC Science. 2022 Mar 18;375(6586):1287-1291. doi: 10.1126/science.abm3282. Epub 2022 , Mar 17. PMID:35298269^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Koo CW, Tucci FJ, He Y, Rosenzweig AC. Recovery of particulate methane monooxygenase structure and activity in a lipid bilayer. Science. 2022 Mar 18;375(6586):1287-1291. PMID:35298269 doi:10.1126/science.abm3282