Methane monooxygenase enzyme?

Holly Howe asked a question: Methane monooxygenase enzyme?
Asked By: Holly Howe
Date created: Fri, Jul 2, 2021 11:09 AM

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Those who are looking for an answer to the question «Methane monooxygenase enzyme?» often ask the following questions:

⛽ Methane monooxygenase?

Methane monooxygenase (MMO) is an enzyme capable of oxidizing the C-H bond in methane as well as other alkanes. Methane monooxygenase belongs to the class of oxidoreductase enzymes ( EC 1.14.13.25 ).

⛽ Copper in methane monooxygenase?

Abstract. Bacteria that oxidize methane to methanol are central to mitigating emissions of methane, a potent greenhouse gas. The nature of the copper active site in the primary metabolic enzyme of these bacteria, particulate methane monooxygenase (pMMO), has been controversial owing to seemingly contradictory biochemical, spectroscopic, and crystallographic results.

⛽ Copper sites in methane monooxygenase?

The enzymatic conversion of the greenhouse gas, methane, to a liquid fuel, methanol, is performed by methane monooxygenases (MMOs) under mild conditions. The copper stoichiometry of particulate MMO (pMMO) has been long debated, with a dicopper site previously proposed on the basis of a 2.51 Å Cu–Cu feature in extended X-ray absorption fine structure (EXAFS) data.

10 other answers

Methane monooxygenase ( MMO) is an enzyme capable of oxidizing the C-H bond in methane as well as other alkanes. Methane monooxygenase belongs to the class of oxidoreductase enzymes ( EC 1.14.13.25 ). There are two forms of MMO: the well-studied soluble form (sMMO) and the particulate form (pMMO).

Methane monooxygenase (MMO) is an enzyme found in methanotrophs, methane consuming bacteria, that is responsible for catalyzing the oxidation of methane (\(\ce{CH_{4}}\)) to methanol (\(\ce{CH_{3}OH}\)), shown in Figure 1.

Methane monooxygenase (MMO) is the first enzyme in the metabolic pathway of methanotrophs, which are bacteria that use methane as their sole source of carbon and energy. From: Comprehensive Natural Products II, 2010

The particulate methane monooxygenase (pMMO) is a multi-copper enzyme that mediates the facile conversion of methane to methanol in methanotrophic bacteria. As a membrane-bound multi-subunit metalloprotein, the highly active protein has been difficult to isolate and purify to homogeneity for biochemical and biophysical studies.

Two distinct enzymes, a copper-dependent membrane protein, particulate methane monooxygenase (pMMO), and an iron-dependent cytosolic protein, soluble methane monooxygenase (sMMO), carry out this transformation using large protein scaffolds that help to facilitate the timely transport of hydrocarbon, O₂, proton, and electron substrates to buried dimetallic active sites.

Methane monooxygenases (MMOs) mediate the facile conversion of methane into methanol in methanotrophic bacteria with high efficiency under ambient conditions. Because the selective oxidation of methane is extremely challenging, there is considerable interest in understanding how these enzymes carry out this difficult chemistry.

Methane monooxygenase (particulate). Reaction catalysed; Methane + quinol + O(2) => methanol + quinone + H(2)O: Cofactor(s) Cu cation. Comment(s) It is membrane-bound, in contrast to the soluble EC 1.14.13.25. Cross-references; BRENDA: 1.14.18.3: EC2PDB: 1.14.18.3: ExplorEnz: 1.14.18.3: PRIAM enzyme-specific profiles: 1.14.18.3: KEGG Ligand Database for Enzyme Nomenclature

Methane monooxygenase (soluble). Alternative Name(s) Methane hydroxylase. Reaction catalysed; Methane + NAD(P)H + O(2) => methanol + NAD(P)(+) + H(2)O: Comment(s) The enzyme is soluble, in contrast to the particulate enzyme, EC 1.14.18.3.

The first step in the oxidation of methane is the conversion to methanol by methane monooxygenase, the key enzyme, which exists in two forms: the cytoplasmic, soluble methane monooxygenase (sMMO) and the membrane-bound, particulate methane monooxygenase (pMMO). This paper reviews the biochemistry and molecular biology of both forms of MMO.

Methane is both a potent greenhouse gas and a readily available energy source (1 – 3). Methanotrophic bacteria use enzymes called methane monooxygenases (MMOs) to activate dioxygen and break a 105...

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