| Purification and characterization of malate:quinone oxidoreductase from thermophilic Bacillus sp. PS3. | |
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MedLine Citation:
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PMID: 23143325 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Several bacteria possess membrane-bound dehydrogenases other than cytosolic dehydrogenases in their respiratory chains. In many cases, the membrane-bound malate:quinone oxidoreductases (MQOs) are essential for growth. However, these MQOs are absent in mammalian mitochondria, and therefore may be a potential drug target for pathogenic bacteria. To characterize the kinetic properties of MQOs, we purified MQO from Bacillus sp. PS3, which is a gram-positive and thermophilic bacterium, and cloned the gene encoding MQO based on the obtained partial N-terminus sequence. Purified MQOs showed a molecular mass of ~90 kDa, which was estimated using gel filtration, and it consists of two subunits with a molecular mass of ~50 kDa. Phylogenetic analysis showed a high similarity to the MQO of the Geobacillus group rather than the Bacillus group. Additionally, the purified enzyme was thermostable and it retained menaquinol reduction activity at high temperatures. Although it is difficult to conduct experiments using menaquinol because of its instability, we were able to measure the oxidase activity of cytochrome bd-type quinol oxidase by using menaquinol-1 by coupling this molecule with the menaquinol reduction reaction using purified MQOs. |
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Authors:
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Yoshiki Kabashima; Nobuhito Sone; Tomoichirou Kusumoto; Junshi Sakamoto |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-11 |
Journal Detail:
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Title: Journal of bioenergetics and biomembranes Volume: - ISSN: 1573-6881 ISO Abbreviation: J. Bioenerg. Biomembr. Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7701859 Medline TA: J Bioenerg Biomembr Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Bioscience and Bioinformatics, Kyushu Institute of Technology, Kawazu 680-4, Iizuka, Fukuoka-ken, 820-8502, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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