Phosphoproteomics of consecuively active AKT in liver and Insulin stimulated primary Hepatocytes

ABSTRACT: Liver mitochondria play a central role in metabolic adaptations to changing nutritional states, yet their dynamic regulation upon anticipated changes in the energy state has remained unaddressed. Here, we show that sensory food perception rapidly induces mitochondrial fission in the liver via protein kinase B/AKT-dependent phosphorylation of serine 131 of the Mitochondrial fission factor (MFFS131), a response mediated via activation of hypothalamic Pro-opiomelanocortin (POMC)-expressing neurons. A non-phosphorylatable MFFS131G knock-in mutation abrogates AKT-induced mitochondrial fragmentation in vitro. In vivo, MFFS131G knock-in mice display altered liver mitochondrial dynamics upon refeeding and impaired insulin stimulated suppression of gluconeogenesis. Collectively, we reveal a critical role for rapid activation of a hypothalamic/liver axis to adapt mitochondrial function to anticipated changes of nutritional state in control of hepatic glucose metabolism. R26-fl-Akt-C mice Mice carrying a conditional myristoylation tagged Akt-C transgene in the ROSA26 locus were used to activate AKT in the liver with a liver specific Cre-dependent virus. The generation of this line has been described previously (V. Kohlhaas et al, 2021) For AAV mediated liver-specific delivery of Cre, R26-fl-Akt-C or control mice were injected with a AAV8-TBG-iCre virus (VB1724, Vector Biolabs). This repository contains two experiments a) Liver of liver active Akt-CA and b) Insulin stimulation of primary heptocytes. Please note that replicate one of the hepatocyte dataset have been removed from the analysis due to the limited number of posphosites compared to others.

INSTRUMENT(S): Orbitrap Exploris 480

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Liver, Cell Culture

SUBMITTER: Hendrik Nolte  

LAB HEAD: Thomas Langer

PROVIDER: PXD049957 | Pride | 2024-03-28

REPOSITORIES: Pride