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Pluripotency Activity of Nanog Requires Biochemical Stabilization by Variant Histone Protein H2A.Z
Jiaxu Wang1,2, Mengran Qiao1, Qianqian He1
1CAS Key Laboratory of Innate Immunity and Chronic Disease, Innovation Center for Cell Signaling Network, School of Life Sciences and Medical Center, University of Science & Technology of China, Hefei, People's Republic of China.
Abstract:
The variant histone protein H2A.Z plays a critical role in early development. Likewise, Nanog, a master regulator of embryonic stem cells (ESCs), is essential for proper development in early embryogenesis. In this study, we establish that these two factors work together to maintain pluripotency. It is shown that H2A.Z influences the protein level of Nanog through the ubiquitin-proteasome pathway. Knockdown of H2A.Z causes differentiation of mouse ESCs and disrupts the reprogramming of somatic cells, which can be partially rescued by overexpression of Nanog. We conclude that the H2A.Z-Nanog partnership is involved in ESC pluripotency and reprogramming of somatic cells. Stem Cells 2015;33:2126-2134.
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