NDLI: The malignant brain tumor (MBT) domain protein SFMBT1 is an integral histone reader subunit of the LSD1 demethylase complex for chromatin association and epithelial-to-mesenchymal transition.

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The malignant brain tumor (MBT) domain protein SFMBT1 is an integral histone reader subunit of the LSD1 demethylase complex for chromatin association and epithelial-to-mesenchymal transition.

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The malignant brain tumor (MBT) domain protein SFMBT1 is an integral histone reader subunit of the LSD1 demethylase complex for chromatin association and epithelial-to-mesenchymal transition.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lin, Tong Biswas, Shyamasri Lu, Jianrong Li, Guangyao Wu, Lizi Tang, Ming Shenoy, Anitha K. Tongdee, Emily Law, Brian K. Jin, Yue Pinard, Melissa A. Mckenna, Robert Tran, Quyen Zhou, Lei Lin, Shuibin Shen, Huangxuan Cai, Qingsong Gu, Yumei
Description	Author Affiliation: Tang M ( From the Department of Biochemistry and Molecular Biology.)
Abstract	Chromatin readers decipher the functional readouts of histone modifications by recruiting specific effector complexes for subsequent epigenetic reprogramming. The LSD1 (also known as KDM1A) histone demethylase complex modifies chromatin and represses transcription in part by catalyzing demethylation of dimethylated histone H3 lysine 4 (H3K4me2), a mark for active transcription. However, none of its currently known subunits recognizes methylated histones. The Snai1 family transcription factors are central drivers of epithelial-to-mesenchymal transition (EMT) by which epithelial cells acquire enhanced invasiveness. Snai1-mediated transcriptional repression of epithelial genes depends on its recruitment of the LSD1 complex and ensuing demethylation of H3K4me2 at its target genes. Through biochemical purification, we identified the MBT domain-containing protein SFMBT1 as a novel component of the LSD1 complex associated with Snai1. Unlike other mammalian MBT domain proteins characterized to date that selectively recognize mono- and dimethylated lysines, SFMBT1 binds di- and trimethyl H3K4, both of which are enriched at active promoters. We show that SFMBT1 is essential for Snai1-dependent recruitment of LSD1 to chromatin, demethylation of H3K4me2, transcriptional repression of epithelial markers, and induction of EMT by TGFß. Carcinogenic metal nickel is a widespread environmental and occupational pollutant. Nickel alters gene expression and induces EMT. We demonstrate the nickel-initiated effects are dependent on LSD1-SFMBT1-mediated chromatin modification. Furthermore, in human cancer, expression of SFMBT1 is associated with mesenchymal markers and unfavorable prognosis. These results highlight a critical role of SFMBT1 in epigenetic regulation, EMT, and cancer.
ISSN	00219258
e-ISSN	1083351X
Journal	Journal of Biological Chemistry
Issue Number	38
Volume Number	288
Language	English
Publisher	American Society for Biochemistry and Molecular Biology (United States)
Publisher Date	2013-09-20
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Chromatin Metabolism Epithelial Cells Epithelial-Mesenchymal Transition Histone Demethylases Histones Neoplasm Proteins Neoplasms Repressor Proteins Carcinogens Pharmacology Genetics Pathology HEK293 Cells Methylation Nickel Adverse Effects Trace Elements Transcription Factors Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Biochemistry Molecular Biology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Biochemistry Molecular Biology

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