Cited by 123Advanced Proteomics Techniques and ApplicationsSirtuins and Resveratrol in MedicineUbiquitin and proteasome pathways

Quantification of mitochondrial acetylation dynamics highlights prominent sites of metabolic regulation

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Still, Amelia J., Floyd, Brendan J., Hebert, Alexander S., Bingman, Craig A., Carson, Joshua J., Gunderson, Drew R., Dolan, Brendan K., Grimsrud, Paul A. +8 more·2013·Journal of Biological Chemistry

Abstract

Lysine acetylation is rapidly becoming established as a key post-translational modification for regulating mitochondrial metabolism. Nonetheless, distinguishing regulatory sites from among the thousands identified by mass spectrometry and elucidating how these modifications alter enzyme function remain primary challenges. Here, we performed multiplexed quantitative mass spectrometry to measure changes in the mouse liver mitochondrial acetylproteome in response to acute and chronic alterations in nutritional status, and integrated these data sets with our compendium of predicted Sirt3 targets. These analyses highlight a subset of mitochondrial proteins with dynamic acetylation sites, including acetyl-CoA acetyltransferase 1 (Acat1), an enzyme central to multiple metabolic pathways. We performed in vitro biochemistry and molecular modeling to demonstrate that acetylation of Acat1 decreases its activity by disrupting the binding of coenzyme A. Collectively, our data reveal an important new target of regulatory acetylation and provide a foundation for investigating the role of select mitochondrial protein acetylation sites in mediating acute and chronic metabolic transitions. Background: Lysine acetylation, a prevalent post-translational modification, alters mitochondrial metabolism in response to nutrient changes. Results: Quantitative proteomics distinguishes dynamic and static acetylation sites, highlighting 48 likely regulatory sites of thousands identified. Conclusion: Acetylation of Acat1 lysine 260, a highly dynamic site, reversibly inhibits enzyme activity. Significance: Quantitative, state-specific proteomic analyses accelerate the functional characterization of acetylation in mitochondrial remodeling.

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Authors
Still, A. J., Floyd, B. J., Hebert, A. S., Bingman, C. A., Carson, J. J., Gunderson, D. R., Dolan, B. K., Grimsrud, P. A., Dittenhafer-Reed, K. E., Stapleton, D. S., Keller, M. P., Westphall, M. S., Denu, J. M., Attie, A. D., Coon, J. J., & Pagliarini, D. J.
Affiliations
University of Wisconsin–Madison (US)
Corresponding author
Pagliarini, David J.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2013-09
Volume
288
Issue
36
Pages
26209-26219
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2037959732
Cited by
123
References
72
Citations by year
2026: 3 · 2025: 4 · 2024: 4 · 2023: 6 · 2022: 11 · 2021: 8 · 2020: 5 · 2019: 8 · 2018: 9 · 2017: 12 · 2016: 16 · 2015: 18 · 2014: 15 · 2013: 4
FWCI
7.95
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (1256259, DK066369)
  • American Heart Association (T32GM008692)
  • Glenn Foundation for Medical Research
  • National Institutes of Health (DGE-1256259)
  • National Institute on Aging (R01AG038679, AG038679)
  • National Cancer Institute (P30CA014520)
  • National Institute of General Medical Sciences (R01GM080148, GM-065386, U01GM094622, T32GM008349, R01GM065386, T32GM007215, R37GM059785, T32GM008692)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK-066369, RC1DK086410, F32DK091049, R01DK066369, DK058037, R01DK058037, T32DK007665, R01DK098672)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
lysine acetylation, ACAT1, SIRT3, coenzyme A binding, enzyme inhibition, post-translational modification, mitochondrial metabolism, liver, nutritional status, quantitative proteomics
MeSH terms
Acetyl-CoA C-Acetyltransferase, Acetyl Coenzyme A, Acetylation, Animals, Mice, Obese, Mitochondria, Liver, Proteome, Mice, Sirtuin 3

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