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-Structure paper
Title | Structure and activity of particulate methane monooxygenase arrays in methanotrophs. |
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Journal, issue, pages | Nat Commun, Vol. 13, Issue 1, Page 5221, Year 2022 |
Publish date | Sep 5, 2022 |
Authors | Yanan Zhu / Christopher W Koo / C Keith Cassidy / Matthew C Spink / Tao Ni / Laura C Zanetti-Domingues / Benji Bateman / Marisa L Martin-Fernandez / Juan Shen / Yuewen Sheng / Yun Song / Zhengyi Yang / Amy C Rosenzweig / Peijun Zhang / |
PubMed Abstract | Methane-oxidizing bacteria play a central role in greenhouse gas mitigation and have potential applications in biomanufacturing. Their primary metabolic enzyme, particulate methane monooxygenase ...Methane-oxidizing bacteria play a central role in greenhouse gas mitigation and have potential applications in biomanufacturing. Their primary metabolic enzyme, particulate methane monooxygenase (pMMO), is housed in copper-induced intracytoplasmic membranes (ICMs), of which the function and biogenesis are not known. We show by serial cryo-focused ion beam (cryoFIB) milling/scanning electron microscope (SEM) volume imaging and lamellae-based cellular cryo-electron tomography (cryoET) that these ICMs are derived from the inner cell membrane. The pMMO trimer, resolved by cryoET and subtomogram averaging to 4.8 Å in the ICM, forms higher-order hexagonal arrays in intact cells. Array formation correlates with increased enzymatic activity, highlighting the importance of studying the enzyme in its native environment. These findings also demonstrate the power of cryoET to structurally characterize native membrane enzymes in the cellular context. |
External links | Nat Commun / PubMed:36064719 / PubMed Central |
Methods | EM (subtomogram averaging) |
Resolution | 4.8 - 12.0 Å |
Structure data | EMDB-14399, PDB-7yzy: EMDB-14530: pMMO three trimer interaction map from native membrane |
Source |
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Keywords | MEMBRANE PROTEIN / pMMO / array / native membranes |