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Acetylation of TBX5 by KAT2B and KAT2A regulates heart and limb development

Ghosh, Tushar K.; Aparicio-S�nchez, Jos� J.; Buxton, Sarah; Ketley, Ami; Mohamed, Tasabeeh; Rutland, Catrin S.; Loughna, Siobhan; Brook, J. David

Acetylation of TBX5 by KAT2B and KAT2A regulates heart and limb development Thumbnail


Tushar K. Ghosh

Jos� J. Aparicio-S�nchez

Sarah Buxton

Research Fellow

Tasabeeh Mohamed

Professor of Human Genetics


© 2017 Elsevier Ltd TBX5 plays a critical role in heart and forelimb development. Mutations in TBX5 cause Holt-Oram syndrome, an autosomal dominant condition that affects the formation of the heart and upper-limb. Several studies have provided significant insight into the role of TBX5 in cardiogenesis; however, how TBX5 activity is regulated by other factors is still unknown. Here we report that histone acetyltransferases KAT2A and KAT2B associate with TBX5 and acetylate it at Lys339. Acetylation potentiates its transcriptional activity and is required for nuclear retention. Morpholino-mediated knockdown of kat2a and kat2b transcripts in zebrafish severely perturb heart and limb development, mirroring the tbx5a knockdown phenotype. The phenotypes found in MO-injected embryos were also observed when we introduced mutations in the kat2a or kat2b genes using the CRISPR-Cas system. These studies highlight the importance of KAT2A and KAT2B modulation of TBX5 and their impact on heart and limb development.


Ghosh, T. K., Aparicio-Sánchez, J. J., Buxton, S., Ketley, A., Mohamed, T., Rutland, C. S., …Brook, J. D. (2018). Acetylation of TBX5 by KAT2B and KAT2A regulates heart and limb development. Journal of Molecular and Cellular Cardiology, 114, 185-198.

Journal Article Type Article
Acceptance Date Nov 17, 2017
Online Publication Date Nov 22, 2017
Publication Date Jan 1, 2018
Deposit Date Dec 21, 2017
Publicly Available Date Nov 23, 2018
Journal Journal of Molecular and Cellular Cardiology
Print ISSN 0022-2828
Electronic ISSN 1095-8584
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 114
Pages 185-198
Keywords TBX5, acetylation, heart development, CRISPR-Cas, zebrafish
Public URL
Publisher URL
Contract Date Dec 21, 2017


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