{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T17:10:27Z","timestamp":1789837827384,"version":"4.0.1"},"reference-count":52,"publisher":"Oxford University Press (OUP)","issue":"2","license":[{"start":{"date-parts":[[2002,6,1]],"date-time":"2002-06-01T00:00:00Z","timestamp":1022889600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2002,6,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>3-Methylcrotonyl-coenzyme A carboxylase (MCCase) is a nuclear-encoded, mitochondrial biotin-containing enzyme composed of two types of subunits: the biotinylated MCC-A subunit (encoded by the gene At1g03090) and the non-biotinylated MCC-B subunit (encoded by the gene At4g34030). The major metabolic role of MCCase is in the mitochondrial catabolism of leucine, and it also might function in the catabolism of isoprenoids and the mevalonate shunt. In the work presented herein, the single-copy gene encoding the Arabidopsis MCC-A subunit was isolated and characterized. It contains 15 exons separated by 14 introns. We examined the expression of the single-copy MCC-Aand MCC-B genes in Arabidopsis by monitoring the accumulation of the two protein and mRNA products. In addition, the expression of these two genes was studied in transgenic plants containing the 1.1- and 1.0-kb 5\u2032 upstream sequences of the two MCCase subunit genes, respectively, fused to the \u03b2-glucuronidase gene. Light deprivation induces MCCase expression, which is suppressed by exogenous carbohydrates, especially sucrose. Several lines of evidence indicate that the suppressor of MCCase expression is synthesized in illuminated photosynthetic organs, and can be translocated to other organs to regulate MCCase expression. These results are consistent with the hypothesis that the suppressor of MCCase expression is a carbohydrate, perhaps sucrose or a carbohydrate metabolite. We conclude that MCCase expression is primarily controlled at the level of gene transcription and regulated by a complex interplay between environmental and metabolic signals. The observed expression patterns may indicate that one of the physiological roles of MCCase is to maintain the carbon status of the organism, possibly via the catabolism of leucine.<\/jats:p>","DOI":"10.1104\/pp.001842","type":"journal-article","created":{"date-parts":[[2002,7,28]],"date-time":"2002-07-28T22:44:09Z","timestamp":1027896249000},"page":"625-637","source":"Crossref","is-referenced-by-count":45,"title":["Metabolic and Environmental Regulation of 3-Methylcrotonyl-Coenzyme A Carboxylase Expression in Arabidopsis"],"prefix":"10.1093","volume":"129","author":[{"given":"Ping","family":"Che","sequence":"first","affiliation":[{"name":"Departments of Biochemistry, Biophysics, and Molecular Biology (P.C., B.J.N.),"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eve Syrkin","family":"Wurtele","sequence":"additional","affiliation":[{"name":"Botany (E.S.W.), and"},{"name":"Center for Designer Crops (E.S.W., B.J.N.), Iowa State University, Ames, Iowa 50011"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Basil J.","family":"Nikolau","sequence":"additional","affiliation":[{"name":"Departments of Biochemistry, Biophysics, and Molecular Biology (P.C., B.J.N.),"},{"name":"Center for Designer Crops (E.S.W., B.J.N.), Iowa State University, Ames, Iowa 50011"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2002,6,1]]},"reference":[{"key":"2021062512551356400_R1","doi-asserted-by":"crossref","first-page":"957","DOI":"10.1104\/pp.102.3.957","article-title":"Purification and characterization of 3-methylcrotonyl-CoA carboxylase from higher plant mitochondria.","volume":"102","author":"Alban","year":"1993","journal-title":"Plant Physiol"},{"key":"2021062512551356400_R2","doi-asserted-by":"crossref","first-page":"1127","DOI":"10.1104\/pp.118.4.1127","article-title":"3-Methylcrotonyl-coenzyme A carboxylase is a component of the mitochondrial leucine catabolic pathway in 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