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Post-translational control of beige fat biogenesis by PRDM16 stabilization
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Post-translational control of beige fat biogenesis by PRDM16 stabilization
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Journal Article
Post-translational control of beige fat biogenesis by PRDM16 stabilization
2022
Overview
Compelling evidence shows that brown and beige adipose tissue are protective against metabolic diseases
1
,
2
. PR domain-containing 16 (PRDM16) is a dominant activator of the biogenesis of beige adipocytes by forming a complex with transcriptional and epigenetic factors and is therefore an attractive target for improving metabolic health
3
–
8
. However, a lack of knowledge surrounding the regulation of PRDM16 protein expression hampered us from selectively targeting this transcriptional pathway. Here we identify CUL2–APPBP2 as the ubiquitin E3 ligase that determines PRDM16 protein stability by catalysing its polyubiquitination. Inhibition of CUL2–APPBP2 sufficiently extended the half-life of PRDM16 protein and promoted beige adipocyte biogenesis. By contrast, elevated CUL2–APPBP2 expression was found in aged adipose tissues and repressed adipocyte thermogenesis by degrading PRDM16 protein. Importantly, extended PRDM16 protein stability by adipocyte-specific deletion of CUL2–APPBP2 counteracted diet-induced obesity, glucose intolerance, insulin resistance and dyslipidaemia in mice. These results offer a cell-autonomous route to selectively activate the PRDM16 pathway in adipose tissues.
The ubiquitin E3 ligase CUL2–APPBP2 determines PRDM16 protein stability by catalysing PRDM16 polyubiquitination in beige fat.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
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/ Adipocytes, Beige - metabolism
/ Adipose Tissue, Beige - metabolism
/ Adipose Tissue, Brown - metabolism
/ Animals
/ Body fat
/ DNA-Binding Proteins - metabolism
/ Enzymes
/ Glucose
/ Humanities and Social Sciences
/ Insulin
/ Ligands
/ Mice
/ Obesity
/ Proteins
/ Rodents
/ Science
