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Two-hybrid analysis identifies PSMD11, a non-ATPase subunit of the proteasome, as a novel interaction partner of AMP-activated protein kinase

AuthorsMoreno, Daniel; Viana, Rosa ; Sanz, Pascual
Two-hybrid screening
Issue DateDec-2009
PublisherBlake and Helsey Editores
CitationInternational Journal of Biochemistry and Cell Biology 41(12):2431-2439. (2009)
AbstractMammalian AMP-activated protein kinase (AMPK) is a heterotrimeric serine/threonine protein kinase that acts as a sensor of cellular energy status. It interacts with a great variety of different substrates leading to short term (i.e. regulation of the activity of different enzymes by direct phosphorylation) and long-term effects (i.e. regulation of transcriptional activity of different transcription factors). In this work, we describe the use of the yeast two-hybrid technology to identify additional proteins that interact with the different subunits of AMPK. We have performed three yeast two-hybrid screenings of a human skeletal muscle cDNA library using three different baits: a constitutively active form of AMPK2 (LexA-AMPK2-T172D) co-expressed with AMPK1, LexA-AMPK2 and LexA-AMPK3. Our results identify novel interaction partners of AMPK in human skeletal muscle. We also further characterize the interaction of AMPK with one of these novel interacting proteins, the non-ATPase subunit of the proteasome PSMD11. Our results indicate that AMPK is able to interact physically with this subunit and modify its phosphorylation status, supporting a possible role for AMPK in regulating proteasome function.
Description9 páginas, 2 figuras, 5 tablas
Publisher version (URL)http://dx.doi.org/10.1016/j.biocel.2009.07.002
Appears in Collections:(IBV) Artículos
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