Small molecule drug A-769662 and AMP synergistically activate naive AMPK independent of upstream kinase signaling
Journal article
Scott, John, Ling, Naomi, Issa, Samah, Dite, Toby, O'Brien, Matthew, Chen, Zhi-Ping, Galic, Sandra, Langendorf, Christopher, Steinberg, Gregory, Kemp, Bruce and Oakhill, Jonathan. (2014). Small molecule drug A-769662 and AMP synergistically activate naive AMPK independent of upstream kinase signaling. Chemistry and Biology. 21(5), pp. 619 - 627. https://doi.org/10.1016/j.chembiol.2014.03.006
Authors | Scott, John, Ling, Naomi, Issa, Samah, Dite, Toby, O'Brien, Matthew, Chen, Zhi-Ping, Galic, Sandra, Langendorf, Christopher, Steinberg, Gregory, Kemp, Bruce and Oakhill, Jonathan |
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Abstract | The AMP-activated protein kinase (AMPK) is a metabolic stress-sensing αβγ heterotrimer responsible for energy homeostasis, making it a therapeutic target for metabolic diseases such as type 2 diabetes and obesity. AMPK signaling is triggered by phosphorylation on the AMPK α subunit activation loop Thr172 by upstream kinases. Dephosphorylated, naive AMPK is thought to be catalytically inactive and insensitive to allosteric regulation by AMP and direct AMPK-activating drugs such as A-769662. Here we show that A-769662 activates AMPK independently of α-Thr172 phosphorylation, provided β-Ser108 is phosphorylated. Although neither A-769662 nor AMP individually stimulate the activity of dephosphorylated AMPK, together they stimulate > 1,000-fold, bypassing the requirement for β-Ser108 phosphorylation. Consequently A-769662 and AMP together activate naive AMPK entirely allosterically and independently of upstream kinase signaling. These findings have important implications for development of AMPK-targeting therapeutics and point to possible combinatorial therapeutic strategies based on AMP and AMPK drugs. |
Year | 2014 |
Journal | Chemistry and Biology |
Journal citation | 21 (5), pp. 619 - 627 |
ISSN | 1074-5521 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.chembiol.2014.03.006 |
Page range | 619 - 627 |
Publisher's version | File Access Level Controlled |
https://acuresearchbank.acu.edu.au/item/868yz/small-molecule-drug-a-769662-and-amp-synergistically-activate-naive-ampk-independent-of-upstream-kinase-signaling
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