SIRT6 links histone H3 lysine 9 deacetylation to NF-kappaB-dependent gene expression and organismal life span.
SIRT6 links histone H3 lysine 9 deacetylation to NF-kappaB-dependent gene expression and organismal life span.
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DOI:
10.1016/j.cell.2008.10.052
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发表时间:
2009-01-09
期刊:
影响因子:
64.5
通讯作者:
Chua KF
中科院分区:
文献类型:
--
作者:
Kawahara TL;Michishita E;Adler AS;Damian M;Berber E;Lin M;McCord RA;Ongaigui KC;Boxer LD;Chang HY;Chua KF
Members of the Sirtuin (SIRT) family of NAD+-dependent deacetylases promote longevity in multiple organisms. Deficiency of mammalian SIRT6 leads to shortened lifespan and an aging-like phenotype in mice, but the underlying molecular mechanisms are unclear. Here we show that SIRT6 functions at chromatin to attenuate NF-κB signaling. SIRT6 interacts with the NF-κB RELA subunit and deacetylates histone H3 lysine 9 (H3K9) at NF-κB target gene promoters. In SIRT6-deficient cells, hyperacetylation of H3K9 at these target promoters is associated with increased RELA promoter occupancy, and enhanced NF-κB-dependent modulation of gene expression, apoptosis and cellular senescence. Computational genomics analyses revealed increased activity of NF-κB-driven gene expression programs in multiple Sirt6-deficient tissues in vivo. Moreover, haploinsufficiency of RelA rescues the early lethality and degenerative syndrome of Sirt6-deficient mice. We propose that SIRT6 attenuates NF-κB signaling via H3K9 deacetylation at chromatin, and hyperactive NF-κB signaling may contribute to premature and normal aging.
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