PRDM16 Suppresses MLL1r Leukemia via Intrinsic Histone Methyltransferase Activity

Bo Zhou, Jingya Wang, Shirley Y. Lee, Jie Xiong, Natarajan Bhanu, Qi Guo, Peilin Ma, Yuqing Sun, Rajesh C. Rao, Benjamin A. Garcia, Jay Hess, Yali Dou

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

PRDM16 is a transcription co-factor that plays critical roles in development of brown adipose tissue, as well as maintenance of adult hematopoietic and neural stem cells. Here we report that PRDM16 is a histone H3K4 methyltransferase on chromatin. Mutation in the N-terminal PR domain of PRDM16 abolishes the intrinsic enzymatic activity of PRDM16. We show that the methyltransferase activity of PRDM16 is required for specific suppression of MLL fusion protein-induced leukemogenesis both in vitro and in vivo. Mechanistic studies show that PRDM16 directly activates the SNAG family transcription factor Gfi1b, which in turn downregulates the HOXA gene cluster. Knockdown Gfi1b represses PRDM16-mediated tumor suppression, while Gfi1b overexpression mimics PRDM16 overexpression. In further support of the tumor suppressor function of PRDM16, silencing PRDM16 by DNA methylation is concomitant with MLL-AF9-induced leukemic transformation. Taken together, our study reveals a previously uncharacterized function of PRDM16 that depends on its PR domain activity. Zhou et al. have defined the H3K4 histone methyltransferase activity of PRDM16 on chromatin. The activity of PRDM16 is essential to inhibit the leukemic transformation induced by the MLL1 fusion proteins. They further identified transcription factor Gfi1b as the key mediator for the tumor suppression function of PRDM16.

Original languageEnglish (US)
Pages (from-to)222-236
Number of pages15
JournalMolecular Cell
Volume62
Issue number2
DOIs
StatePublished - Apr 21 2016

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Leukemia
Transcription Factors
Chromatin
Neoplasms
Adult Stem Cells
Brown Adipose Tissue
Neural Stem Cells
Methyltransferases
DNA Methylation
Multigene Family
Hematopoietic Stem Cells
Proteins
Down-Regulation
Maintenance
Mutation
histone methyltransferase
In Vitro Techniques

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

Cite this

Zhou, B., Wang, J., Lee, S. Y., Xiong, J., Bhanu, N., Guo, Q., ... Dou, Y. (2016). PRDM16 Suppresses MLL1r Leukemia via Intrinsic Histone Methyltransferase Activity. Molecular Cell, 62(2), 222-236. https://doi.org/10.1016/j.molcel.2016.03.010

PRDM16 Suppresses MLL1r Leukemia via Intrinsic Histone Methyltransferase Activity. / Zhou, Bo; Wang, Jingya; Lee, Shirley Y.; Xiong, Jie; Bhanu, Natarajan; Guo, Qi; Ma, Peilin; Sun, Yuqing; Rao, Rajesh C.; Garcia, Benjamin A.; Hess, Jay; Dou, Yali.

In: Molecular Cell, Vol. 62, No. 2, 21.04.2016, p. 222-236.

Research output: Contribution to journalArticle

Zhou, B, Wang, J, Lee, SY, Xiong, J, Bhanu, N, Guo, Q, Ma, P, Sun, Y, Rao, RC, Garcia, BA, Hess, J & Dou, Y 2016, 'PRDM16 Suppresses MLL1r Leukemia via Intrinsic Histone Methyltransferase Activity', Molecular Cell, vol. 62, no. 2, pp. 222-236. https://doi.org/10.1016/j.molcel.2016.03.010
Zhou, Bo ; Wang, Jingya ; Lee, Shirley Y. ; Xiong, Jie ; Bhanu, Natarajan ; Guo, Qi ; Ma, Peilin ; Sun, Yuqing ; Rao, Rajesh C. ; Garcia, Benjamin A. ; Hess, Jay ; Dou, Yali. / PRDM16 Suppresses MLL1r Leukemia via Intrinsic Histone Methyltransferase Activity. In: Molecular Cell. 2016 ; Vol. 62, No. 2. pp. 222-236.
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