Proteomics

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The interactomes of RUNX1 and RUNX3 from Mus musculus T cells

ABSTRACT: Cellular binary fate decisions require the progeny to silence genes associated with the alternative fate. The major subsets of alpha:beta T cells have been extensively studied as a model system for fate decisions. While the transcription factor RUNX3 is required for the initiation of Cd4 silencing in CD8 T cell progenitors, it is not required to maintain the silencing of Cd4 and other helper T lineage genes. The other runt domain containing protein, RUNX1, silences Cd4 in an earlier T cell progenitor, but this silencing is reversed whereas the gene silencing after RUNX3 expression is not reverse. Therefore, we hypothesized that RUNX3 and not RUNX1 recruits other factors that maintains the silencing of helper T lineage genes in CD8 T cells. To this end, we performed a proteomics screen of RUNX1 and RUNX3 to determine candidate silencing factors.

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): T Cell, Cell Culture

SUBMITTER: Daniel Verbaro  

LAB HEAD: Takeshi Egawa

PROVIDER: PXD007511 | Pride | 2019-11-12

REPOSITORIES: Pride

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Publications

Cutting Edge: The Histone Methyltransferase G9a Is Required for Silencing of Helper T Lineage-Associated Genes in Proliferating CD8 T Cells.

Verbaro Daniel J DJ   Sakurai Nagisa N   Kim Byungil B   Shinkai Yoichi Y   Egawa Takeshi T  

Journal of immunology (Baltimore, Md. : 1950) 20180502 12

Helper versus cytotoxic T lineage decision in the thymus has been studied as a model for silencing of alternative lineage genes. Although the transcription factor RUNX3 is required for the initiation of <i>Cd4</i> silencing in developing CD8 T cells, it is unknown how silencing of <i>Cd4</i> and other helper T lineage genes is maintained. We show that the histone methyltransferase G9a is necessary for silencing helper T lineage genes in proliferating mouse CD8 T cells. Despite normal initial <i>  ...[more]

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