Mapping the Residue Specificities of Epigenome Enzymes by Yeast Surface Display

Overview

Journal Cell Chem Biol

Publisher Cell Press

Specialty Biochemistry

Date 2021 Jun 29

PMID 34186032

Citations 4

Authors

Alison C Waldman

Balaji M Rao

Albert J Keung

Affiliations

Soon will be listed here.

Abstract

Histone proteins are decorated with a combinatorially and numerically diverse set of biochemical modifications. Here, we describe a versatile and scalable approach which enables efficient characterization of histone modifications without the need for recombinant protein production. As proof-of-concept, we first use this system to rapidly profile the histone H3 and H4 residue writing specificities of the human histone acetyltransferase, p300. Subsequently, a large panel of commercially available anti-acetylation antibodies are screened for their specificities, identifying many suitable and unsuitable reagents. Furthermore, this approach enables efficient mapping of the large binary crosstalk space between acetylated residues on histones H3 and H4 and uncovers residue interdependencies affecting p300 activity. These results show that using yeast surface display to study histone modifications is a useful tool that can advance our understanding of chromatin biology by enabling efficient interrogation of the complexity of epigenome modifications.

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