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    FEBS Lett. 1991 Jul 29;286(1-2):142-6.

    Comparative membrane locations and activities of human monoamine oxidases expressed in yeast.

    Source

    Centre de Génétique Moléculaire du C.N.R.S., Laboratoire Propre Associé à l'Université Pierre-et-Marie-Curie, Gif-sur-Yvette, France.

    Abstract

    Human monoamine oxidases A and B were expressed under the control of a galactose inducible promoter in Saccharomyces cerevisiae. The two MAO isoenzymes were found located in the yeast mitochondrial outer membrane, probably in different orientations as suggested by controlled proteolysis experiments. A high level of both human MAO-A or -B activities is measured in intact mitochondria without the need for any detergent solubilisation step. The substrate and inhibitor selectivities of the membrane-bound MAOs are highly similar to those of purified human enzymes. The level of MAO-B activity, however, is selectively lowered when bound to the membrane.

    PMID:
    1864361
    [PubMed - indexed for MEDLINE]

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