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Title

Characterization of splice variants of the genes encoding human mitochondrial HMG-CoA lyase and HMG-CoA synthase, the main enzymes of the ketogenesis pathway

AuthorsPuisac, Beatriz; Wesseling, J.; Gómez-Puertas, Paulino ; Pié, Juan
KeywordsHMGCL
Alternative splicing
Ketone bodies
HMGCS2
Issue Date2012
PublisherKluwer Academic Publishers
CitationMolecular Biology Reports 39: 4777- 4785 (2012)
AbstractThe genes HMGCS2 and HMGCL encode the two main enzymes for ketone-body synthesis, mitochondrial HMG-CoA synthase and HMG-CoA lyase. Here, we identify and describe possible splice variants of these genes in human tissues. We detected an alternative transcript of HMGCS2 carrying a deletion of exon 4, and two alternative transcripts of HMGCL with deletions of exons 5 and 6, and exons 5, 6 and 7, respectively. All splice variants maintained the reading frame. However, Western blot studies and overexpression measurements in eukaryotic or prokaryotic cell models did not reveal HL or mHS protein variants. Both genes showed a similar distribution of the inactive variants in different tissues. Surprisingly, the highest percentages were found in tissues where almost no ketone bodies are synthesized: heart, skeletal muscle and brain. Our results suggest that alternative splicing might coordinately block the two main enzymes of ketogenesis in specific human tissues
URIhttp://hdl.handle.net/10261/112173
DOI10.1007/s11033-011-1270-8
Identifiersdoi: 10.1007/s11033-011-1270-8
issn: 0301-4851
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