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© Ahmed Haouz
Cristaux d'une protéine de Mycobacterium tuberculosis produits dans le cadre du Grand Programme Horizontal sur la Tuberculose à l'Institut Pasteur. La caractérisation structurale de protéines mycobactériennes aide à une meilleure compréhension de la physiologie et de la pathogénicité des mycobactéries et fournit un point de départ pour la conception de nouveaux agents antibactériens.
Publication : The Journal of biological chemistry

Structural and functional characterization of CREB-binding protein (CREBBP) as a histone propionyltransferase.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of biological chemistry - 02 Jul 2025

Cui G, Ley M, Mechaly AE, Bui LC, Michail C, Berthelet J, Dairou J, Yang H, Chevreux G, Moroy G, Green MR, Haouz A, Rodrigues Lima F

Link to Pubmed [PMID] – 40615044

Link to DOI – 10.1016/j.jbc.2025.110444

J Biol Chem 2025 Jul; 301(8): 110444

In addition to histone acetylation, histone lysine propionylation (such as the H3K18Pr mark) has recently attracted significant attention as a common and abundant modification linking the cellular metabolic state and gene expression. CREB-binding protein (CREBBP) and EP300 are key histone acetyltransferases that play a critical role in gene expression through their catalytic activity. Although CREBBP and EP300 are homologous enzymes with high structural similarities, they exhibit both redundant and specific functions. Dissecting the shared and divergent properties of CREBBP and EP300 is thus important to understand their roles. However, despite the importance of CREBBP, most mechanistic and structural studies have focused on EP300, leaving much less information about CREBBP. Interestingly, recent enzymatic and structural studies have demonstrated that EP300 can also function as a histone propionyltransferase. Using a combination of acyltransferase assays with different acyl-CoA cofactors and with peptides, recombinant histone, or recombinant nucleosomes as substrates, we provide enzymatic evidence that, in addition to its well-documented acetyltransferase activity, CREBBP readily propionylates histone H3 in vitro, notably generating the H3K18Pr mark. Importantly, subsequent cellular studies using CRISPR-Cas9-edited cells further support that CREBBP can act as a histone propionyltransferase in vivo, notably depositing the H3K18Pr mark. Finally, the crystal structures of the human CREBBP histone acetyltransferase domain in complex with propionyl-CoA or in complex with Lys-CoA provide the structural basis for the histone propionyltransferase properties of CREBBP. Taken together, these findings provide new insights into the enzymatic functions of CREBBP and a better understanding of the mechanisms linking cellular metabolism and epigenetic regulation.