Journal Article

Molecular Identity of Uncoupling Proteins in Thermogenic Skunk Cabbage

Yasuko Ito-Inaba, Yamato Hida, Hitoshi Mori and Takehito Inaba

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 49, issue 12, pages 1911-1916
Published in print December 2008 | ISSN: 0032-0781
Published online December 2008 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcn161
Molecular Identity of Uncoupling Proteins in Thermogenic Skunk Cabbage

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  • Biochemistry
  • Molecular and Cell Biology
  • Plant Sciences and Forestry

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Thermogenic skunk cabbage has been reported to have two types of uncoupling protein (UCP), a typical 6-transmembrane (TM) SrUCPA and an atypical 5-TM SrUCPB. To verify further the role of SrUCPs in thermogenic skunk cabbage, we examined the molecular identity of SrUCPs in more detail. Both mRNA and genomic analyses supported the presence of SrUCPA, but not SrUCPB. Furthermore, SrUCP protein purified from spadix mitochondria was identified as SrUCPA by mass spectrometry. These results clearly indicate that SrUCPA is the major expressed UCP in skunk cabbage, and the presence of atypical SrUCPB is unlikely to be associated with thermogenesis of skunk cabbage.

Keywords: mRNA splicing; Plant mitochondria; Reproductive organ; Skunk cabbage; Thermogenesis; Uncoupling protein

Journal Article.  3393 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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