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The Lysine Methyltransferase G9a in Immune Cell Differentiation and Function
Sebastian Scheer1, Colby Zaph1
1Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia.
Frontiers in Immunology
|April 27, 2017
Summary
G9a (KMT1C, EHMT2) is a histone methyltransferase crucial for gene silencing. This review explores its role in immune cell differentiation and function, highlighting epigenetic regulation in cellular lineage choice.
Area of Science:
- Epigenetics
- Molecular Biology
- Immunology
Background:
- G9a (KMT1C, EHMT2) is a histone methyltransferase catalyzing H3K9me2, a mark associated with gene silencing.
- H3K9me2 is essential for cellular lineage development in embryonic stem cells by repressing pluripotency factors.
- Immune cells like T cells and innate lymphoid cells (ILCs) require precise gene activation and repression for differentiation and memory formation.
Purpose of the Study:
- To review the molecular mechanisms of G9a-dependent functions.
- To elucidate the role of G9a in lymphoid cell differentiation and function.
- To identify potential G9a-controlled processes in T cells and ILCs.
Main Methods:
- Literature review of G9a functions in epigenetics and immunology.
- Analysis of G9a's role in gene silencing and transcriptional regulation.
- Examination of G9a's involvement in immune cell differentiation and memory.
Main Results:
- G9a-mediated H3K9me2 is critical for repressing pluripotency factors in ES cells.
- G9a plays a role in maintaining gene expression programs during immune cell differentiation.
- G9a is implicated in the quiescent state of memory T cells.
Conclusions:
- G9a-dependent H3K9me2 is dynamically regulated in the immune system.
- Understanding G9a's function provides insight into repressive epigenetic modifications governing cellular lineage choice.
- G9a represents a potential target for modulating immune cell function and differentiation.
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