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KAT6A acetylation mediates metabolic adaptation to growth and mitochondrial metabolism through AMPK

ABSTRACT: We have previously demonstrated that a ketogenic diet alleviates cardiac pathology under high blood pressure. Here we show that lysine acetyltransferase 6A (KAT6A) is acetylated in the hearts of mice fed a ketogenic diet under hypertension, which enhances its interaction with AMPK regulatory subunits. RNA-sequencing analysis demonstrated that the KAT6A-K815Q acetylation-mimetic mutant stimulates AMPK signaling in cardiomyocytes. Moreover, the KAT6A-K815Q acetylation-mimetic mutant mitigated phenylephrine-induced mitochondrial dysfunction and cardiomyocyte hypertrophy via AMPK activation in vitro.

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE286926 | GEO | 2025/12/02

REPOSITORIES: GEO

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Interaction proteins with KAT6A

Project description:Lysine acetyltransferases (KATs) catalyze the transfer of acetyl groups from acetyl-CoA to lysine residues. Our proteomic analysis revealed that KAT6A is acetylated at lysine 815 (K815), corresponding to mouse K816, in the hearts of mice fed a ketogenic diet under high blood pressure. To identify changes in KAT6A interaction partners by K815 acetylation in cardiomyocytes, we performed LC-MS/MS proteomics. We transfected adenovirus-carrying FLAG-KAT6A-wild type (WT, Control (Ctrl)), -K815R (an acetylation resistant mutant, KR), and -K815Q (an acetylation mimetic mutant, KQ) into cardiomyocytes for 2 days. Adenovirus-carrying FLAG was used as a control. KAT6A was immunoprecipitated with anti-FLAG affinity beads, followed by washing, competitive elution with 3x FLAG peptides, and separation by SDS-PAGE.

2025-11-03 | PXD059838 | Pride

KAT6A acetylation of SMAD3 regulates tumor metastasis in triple-negative breast cancer

Project description:Aberrant SMAD3 activation has been implicated as a driving event in cancer metastasis. However, the drivers of SMAD3 activation are poorly defined. Here, we identify SMAD3 as a non-histone substrate of lysine acetyltransferase 6A (KAT6A). The acetylation of SMAD3 at K20 and K117 by KAT6A with promotes SMAD3 association with oncogenic H3K23ac reader TRIM24 and upregulation of immune response-related cytokines. This event in turn leads to enhanced myeloid-derived suppressor cell (MDSC) recruitment and triple-negative breast cancer (TNBC) metastasis. Inhibiting KAT6A in combination with anti-PD-L1 therapy in treating breast cancer xenograft-bearing animals markedly attenuates TNBC metastasis and provides a significant survival benefit. Thus, our work presents an KAT6A acetylation-dependent regulatory mechanism governing SMAD3 oncogenic function and provides insight into how targeting an epigenetic factor with immunotherapies enhances the anti-metastasis efficacy.

2021-11-03 | GSE171230 | GEO

KAT6A mutations in Arboleda-Tham syndrome affect regulation and expression of HOXC genes [RNA-seq]

Project description:Arboleda-Tham Syndrome (ARTHS) is a rare genetic disorder caused by heterozygous, de novo truncating mutations in the gene KAT6A (Lysine(K) acetyltransferase 6A). ARTHS is clinically heterogeneous but characterized by several common features including intellectual disability, developmental and speech delay, hypotonia, congenital heart defects and gastrointestinal problems. KAT6A mRNA is highly expressed throughout early development and the levels of expression are lower levels in differentiated tissues, suggesting a key role maintenance of the stem cell characteristics. Across these cell types, the gene-regulatory mechanisms controlled by KAT6A and the histone-acetylation complex in which it works remain unknown. In this study, we created ARTHS patient-derived (n=7) and control (n=13) dermal fibroblasts from skin punch biopsies. KAT6A is expressed at moderate levels in human fibroblast cells and we performed a comprehensive profiling of the epigenomic and transcriptomic changes in ARTHS.

2023-08-15 | GSE237022 | GEO

KAT6A mutations in Arboleda-Tham syndrome affect regulation and expression of HOXC genes [ChIP-seq]

2023-08-15 | GSE237021 | GEO

KAT6A mutations in Arboleda-Tham syndrome affect regulation and expression of HOXC genes [ATAC-seq]

2023-08-15 | GSE237020 | GEO

The histone acetyltransferase KAT6A is recruited to unmethylated CpG islands via a DNA-binding winged helix domainThe histone acetyltransferase KAT6A is recruited to unmethylated CpG islands via a DNA-binding winged helix domain

Project description:The lysine acetyltransferase KAT6A (MOZ, MYST3) belongs to the MYST family of chromatin regulators, facilitating histone acetylation. Dysregulation of KAT6A has been implicated in developmental syndromes and the onset of acute myeloid leukemia (AML). Previous work suggests that KAT6A is recruited to its genomic targets by a combinatorial function of histone binding PHD fingers, transcription factors and chromatin binding interaction partners. Here, we demonstrated that a winged helix domain at the N-terminus of KAT6A specifically interacts with unmethylated CpG motifs. This DNA binding function leads to the association of KAT6A to unmethylated CpG islands (CGIs) genome wide. Mutation of the essential amino acids completely abrogates the enrichment of KAT6A at CGIs. Overexpression of a KAT6A WH1 mutant has a dominant negative effect on H3K9 histone acetylation, which is comparable to the effects upon overexpression of a KAT6A HAT domain mutant. Taken together, our work revealed a previously unrecognized chromatin recruitment mechanism of KAT6A, offering a new perspective on the role of KAT6A in gene regulation and human diseases

2023-01-14 | PXD034833 | Pride

RNA-seq profiling of mouse embryonic fibroblasts from Kat6a knockout and wildtype mice

Project description:Acetylation of histones by lysine acetyltransferases (KATs) is essential for transcriptional regulation of gene expression. The MYST family of KATs (KAT5-8) includes the oncogenes KAT6A (MOZ) and KAT6B (MORF/QKF). KAT6A has key roles in promoting cell proliferation through transcriptional activation of negative regulators of the Cdkn2a locus, which encode the tumor suppressors INK4A and ARF. To examine the loss of KAT6A function, mouse embryonic fibroblasts (MEFs) were isolated from E13.5 Kat6a+/+ and Kat6a–/– embryos and RNA-seq profiling was performed.

2018-08-03 | GSE108242 | GEO

The histone acetyltransferase KAT6A is recruited to unmethylated CpG islands via a DNA binding winged helix domain [RNA-seq]

Project description:The lysine acetyltransferase KAT6A (MOZ, MYST3) belongs to the MYST family of chromatin regulators, facilitating histone acetylation. Dysregulation of KAT6A has been implicated in developmental syndromes and the onset of acute myeloid leukemia (AML). Previous work suggests that KAT6A is recruited to its genomic targets by a combinatorial function of histone binding PHD fingers, transcription factors and chromatin binding interaction partners. Here, we demonstrate that a winged helix (WH) domain at the very N-terminus of KAT6A specifically interacts with unmethylated CpG motifs. This DNA binding function leads to the association of KAT6A with unmethylated CpG islands (CGIs) genome-wide. Mutation of the essential amino acids for DNA binding completely abrogates the enrichment of KAT6A at CGIs. In contrast, deletion of a second WH domain or the histone tail binding PHD fingers only subtly influences the binding of KAT6A to CGIs. Overexpression of a KAT6A WH1 mutant has a dominant negative effect on H3K9 histone acetylation, which is comparable to the effects upon overexpression of a KAT6A HAT domain mutant. Taken together, our work revealed a previously unrecognized chromatin recruitment mechanism of KAT6A, offering a new perspective on the role of KAT6A in gene regulation and human diseases.

2022-12-20 | GSE206273 | GEO

The histone acetyltransferase KAT6A is recruited to unmethylated CpG islands via a DNA binding winged helix domain [ChIP-seq]

Project description:The lysine acetyltransferase KAT6A (MOZ, MYST3) belongs to the MYST family of chromatin regulators, facilitating histone acetylation. Dysregulation of KAT6A has been implicated in developmental syndromes and the onset of acute myeloid leukemia (AML). Previous work suggests that KAT6A is recruited to its genomic targets by a combinatorial function of histone binding PHD fingers, transcription factors and chromatin binding interaction partners. Here, we demonstrate that a winged helix (WH) domain at the very N-terminus of KAT6A specifically interacts with unmethylated CpG motifs. This DNA binding function leads to the association of KAT6A with unmethylated CpG islands (CGIs) genome-wide. Mutation of the essential amino acids for DNA binding completely abrogates the enrichment of KAT6A at CGIs. In contrast, deletion of a second WH domain or the histone tail binding PHD fingers only subtly influences the binding of KAT6A to CGIs. Overexpression of a KAT6A WH1 mutant has a dominant negative effect on H3K9 histone acetylation, which is comparable to the effects upon overexpression of a KAT6A HAT domain mutant. Taken together, our work revealed a previously unrecognized chromatin recruitment mechanism of KAT6A, offering a new perspective on the role of KAT6A in gene regulation and human diseases.

2022-12-20 | GSE206272 | GEO

KAT6B overexpression rescues embryonic lethality in homozygous null KAT6A mice restoring vitality and normal lifespan [CUT&TAG]

Project description:Closely related genes typically display common essential functions but also functional diversification, ensuring retention of both genes throughout evolution. The histone lysine acetyltransferases KAT6A (MOZ) and KAT6B (QKF/MORF), sharing identical protein domain structure, are mutually exclusive catalytic subunits of a multiprotein complex. Mutations in either KAT6A or KAT6B result in congenital intellectual disability disorders in human patients. In mice, loss of function of either gene results in distinct, severe phenotypic consequences. In this dataset, we investigate the effects of overexpression of KAT6B on the histone acetylation changes caused by loss of KAT6A in mouse embryonic fibroblasts. We show that Kat6b overexpression restores acetylation at histone H3 lysines 23 in Kat6a mutant mouse primary embryonic fibroblasts.

2025-02-24 | GSE287243 | GEO

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