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The MiDAC histone deacetylase complex is essential for embryonic development and has a unique multivalent structure

Published version
Peer-reviewed

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Authors

Turnbull, Robert E.  ORCID logo  https://orcid.org/0000-0003-2863-4374
Fairall, Louise 
Saleh, Almutasem 
Kelsall, Emma 
Morris, Kyle L. 

Abstract

Abstract: MiDAC is one of seven distinct, large multi-protein complexes that recruit class I histone deacetylases to the genome to regulate gene expression. Despite implications of involvement in cell cycle regulation and in several cancers, surprisingly little is known about the function or structure of MiDAC. Here we show that MiDAC is important for chromosome alignment during mitosis in cancer cell lines. Mice lacking the MiDAC proteins, DNTTIP1 or MIDEAS, die with identical phenotypes during late embryogenesis due to perturbations in gene expression that result in heart malformation and haematopoietic failure. This suggests that MiDAC has an essential and unique function that cannot be compensated by other HDAC complexes. Consistent with this, the cryoEM structure of MiDAC reveals a unique and distinctive mode of assembly. Four copies of HDAC1 are positioned at the periphery with outward-facing active sites suggesting that the complex may target multiple nucleosomes implying a processive deacetylase function.

Description

Keywords

Article, /631/45/612/100/2285, /631/80/641/1655, /631/136/2086, /631/337/572, /631/535/1258/1259, /101/28, /64/60, /13/1, /13/31, /13/106, /14/19, /38/39, /38/91, article

Journal Title

Nature Communications

Conference Name

Journal ISSN

2041-1723

Volume Title

11

Publisher

Nature Publishing Group UK
Sponsorship
Wellcome Trust (Wellcome) (100237/Z/12/Z)
RCUK | Biotechnology and Biological Sciences Research Council (BBSRC) (BB/N002954/1)
RCUK | Medical Research Council (MRC) (MC_PC_17136)