AMPK alpha 1 Mouse Monoclonal Antibody [B1-E10]

功能

Catalytic subunit of AMP-activated protein kinase (AMPK), an energy sensor protein kinase that plays a key role in regulating cellular energy metabolism. In response to reduction of intracellular ATP levels, AMPK activates energy-producing pathways and inhibits energy-consuming processes: inhibits protein, carbohydrate and lipid biosynthesis, as well as cell growth and proliferation. AMPK acts via direct phosphorylation of metabolic enzymes, and by longer-term effects via phosphorylation of transcription regulators. Also it acts as a regulator of cellular polarity by remodeling the actin cytoskeleton; probably by indirectly activating myosin. AMPK also acts as a regulator of circadian rhythm by mediating phosphorylation of CRY1, leading to destabilize it. It may regulate the Wnt signaling pathway by phosphorylating CTNNB1, leading to stabilize it. Also has tau-protein kinase activity: in response to amyloid beta A4 protein (APP) exposure, activated by CAMKK2, leading to phosphorylation of MAPT/TAU; however the relevance of such data remains unclear in vivo. Also AMPK phosphorylates CFTR, EEF2K, KLC1, NOS3 and SLC12A1.

背景文献

1. "LKB1 is a master kinase that activates 13 kinases of the AMPK subfamily, including MARK/PAR-1." Lizcano J.M., Goeransson O., Toth R., Deak M., Morrice N.A., Boudeau J., Hawley S.A., Udd L., Maekelae T.P., Hardie D.G., Alessi D.R. EMBO J. 23:833-843(2004)

2. "Folliculin encoded by the BHD gene interacts with a binding protein, FNIP1, and AMPK, and is involved in AMPK and mTOR signaling." Baba M., Hong S.-B., Sharma N., Warren M.B., Nickerson M.L., Iwamatsu A., Esposito D., Gillette W.K., Hopkins R.F. III, Hartley J.L., Furihata M., Oishi S., Zhen W., Burke T.R. Jr., Linehan W.M., Schmidt L.S., Zbar B. Proc. Natl. Acad. Sci. U.S.A. 103:15552-15557(2006)

3. "AMP-activated protein kinase regulates GLUT4 transcription by phosphorylating histone deacetylase 5." McGee S.L., van Denderen B.J., Howlett K.F., Mollica J., Schertzer J.D., Kemp B.E., Hargreaves M. Diabetes 57:860-867(2008)

序列相似性

Belongs to the protein kinase superfamily. CAMK Ser/Thr protein kinase family. SNF1 subfamily.

翻译后修饰

Ubiquitinated.; Phosphorylated at Thr-183 by STK11/LKB1 in complex with STE20-related adapter-alpha (STRADA) pseudo kinase and CAB39. Also phosphorylated at Thr-183 by CAMKK2; triggered by a rise in intracellular calcium ions, without detectable changes in the AMP/ATP ratio. CAMKK1 can also phosphorylate Thr-183, but at a much lower level. Dephosphorylated by protein phosphatase 2A and 2C (PP2A and PP2C). Phosphorylated by ULK1 and ULK2; leading to negatively regulate AMPK activity and suggesting the existence of a regulatory feedback loop between ULK1, ULK2 and AMPK. Dephosphorylated by PPM1A and PPM1B.

亚细胞定位

Cytoplasm, nucleus

UNIPROT

SwissProt: Q13131 Human

别名