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ATF7IP regulates SETDB1 nuclear localization and increases its ubiquitination. | LitMetric

ATF7IP regulates SETDB1 nuclear localization and increases its ubiquitination.

EMBO Rep

Cellular Memory Laboratory, Cluster for Pioneering Research, RIKEN, Wako, Japan.

Published: December 2019

AI Article Synopsis

Article Abstract

Understanding of the appropriate regulation of enzymatic activities of histone-modifying enzymes remains poor. The lysine methyltransferase, SETDB1, is one of the enzymes responsible for the methylation of histone H3 at lysine 9 (H3K9) and plays a key role in H3K9 trimethylation-mediated silencing of genes and retrotransposons. Here, we reported that how SETDB1's enzymatic activities can be regulated by the nuclear protein, ATF7IP, a known binding partner of SETDB1. Mechanistically, ATF7IP mediates SETDB1 retention inside the nucleus, presumably by inhibiting its nuclear export by binding to the N-terminal region of SETDB1, which harbors the nuclear export signal motifs, and also by promoting its nuclear import. The nuclear localization of SETDB1 increases its ubiquitinated, enzymatically more active form. Our results provided an insight as to how ATF7IP can regulate the histone methyltransferase activity of SETDB1 accompanied by its nuclear translocation.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6893292PMC
http://dx.doi.org/10.15252/embr.201948297DOI Listing

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