期刊
NATURE METABOLISM
卷 2, 期 9, 页码 873-+出版社
NATURE RESEARCH
DOI: 10.1038/s42255-020-0245-2
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资金
- Canadian Institutes of Health Research [201709FDN-CEBA-116200]
- Diabetes Canada [DI-5-17-5302-GS]
- National Health and Medical Research Council of Australia (NHMRC) [1098459, 1145265, 1085460, 1138102]
- Australian Research Council [DP170101196]
- Jack Brockhoff Foundation [JBF4206]
- Van Andel Research Institute
- National Institute of Health [R01 GM129436]
- Tier 1 Canada Research Chair
- J. Bruce Duncan Chair in Metabolic Diseases
- Victorian Government's Operational Infrastructure Support Programme
- National Health and Medical Research Council of Australia [1098459, 1145265, 1138102, 1085460] Funding Source: NHMRC
Long-chain fatty acids (LCFAs) play important roles in cellular energy metabolism, acting as both an important energy source and signalling molecules(1). LCFA-CoA esters promote their own oxidation by acting as allosteric inhibitors of acetyl-CoA carboxylase, which reduces the production of malonyl-CoA and relieves inhibition of carnitine palmitoyl-transferase 1, thereby promoting LCFA-CoA transport into the mitochondria for beta-oxidation(2-6). Here we report a new level of regulation wherein LCFA-CoA esters per se allosterically activate AMP-activated protein kinase (AMPK) beta 1-containing isoforms to increase fatty acid oxidation through phosphorylation of acetyl-CoA carboxylase. Activation of AMPK by LCFA-CoA esters requires the allosteric drug and metabolite site formed between the alpha-subunit kinase domain and the beta-subunit. beta 1 subunit mutations that inhibit AMPK activation by the small-molecule activator A769662, which binds to the allosteric drug and metabolite site, also inhibit activation by LCFA-CoAs. Thus, LCFA-CoA metabolites act as direct endogenous AMPK beta 1-selective activators and promote LCFA oxidation.
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