Microbial Oxidation of Hydrocarbons: Properties of a Soluble Methane Monooxygenase from a Facultative Methane-Utilizing Organism, Methylobacterium sp. Strain CRL-26.

Applied and environmental microbiology ·Vol. 44 ·No. 5 ·1982-11-00 ·Pages 1130-7

Patel RN, Hou CT, Laskin AI, Felix A

Abstract

Methylobacterium sp. strain CRL-26 grown in a fermentor contained methane monooxygenase activity in soluble fractions. Soluble methane monooxygenase catalyzed the epoxidation/hydroxylation of a variety of hydrocarbons, including terminal alkenes, internal alkenes, substituted alkenes, branched-chain alkenes, alkanes (C(1) to C(8)), substituted alkanes, branched-chain alkanes, carbon monoxide, ethers, and cyclic and aromatic compounds. The optimum pH and temperature for the epoxidation of propylene by soluble methane monooxygenase were found to be 7.0 and 40 degrees C, respectively. Among various compounds tested, only NADH(2) or NADPH(2) could act as an electron donor. Formate and NAD (in the presence of formate dehydrogenase contained in the soluble fraction) or 2-butanol in the presence of NAD and secondary alcohol dehydrogenase generated the NADH(2) required for the methane monooxygenase. Epoxidation of propylene catalyzed by methane monooxygenase was not inhibited by a range of potential inhibitors, including metal-chelating compounds and potassium cyanide. Sulfhydryl agents and acriflavin inhibited monooxygenase activity. Soluble methane monooxygenase was resolved into three components by ion-exchange chromatography. All three compounds are required for the epoxidation and hydroxylation reactions.

Authors & Affiliations

4 authors, click to expand affiliations / ORCID

Patel R N

Corporate Research Science Laboratory, Exxon Research and Engineering Company, Linden, New Jersey 07036.

Hou C T

Laskin A I

Felix A

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Article Info

Journal

Applied and environmental microbiology

Abbr.

Appl Environ Microbiol

ISSN

0099-2240

DOI

10.1128/aem.44.5.1130-1137.1982

Published

1982-11-00

Pages

1130-7

Language

English

Region

United States

NLM ID

7605801

PMCID

PMC242158

External Links

PubMed source DOI: 10.1128/aem.44.5.1130-1137.1982 PMC Full Text View journal details

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Microbial Oxidation of Hydrocarbons: Properties of a Soluble Methane Monooxygenase from a Facultative Methane-Utilizing Organism, Methylobacterium sp. Strain CRL-26.

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