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NAT10 promotes cancer metastasis by modulating p300/CBP activity through chromatin-associated tRNA [RNA-ChIP]

ABSTRACT: Acetylation of proteins and RNA is crucial for development and cancer progression. NAT10 is the sole RNA acetylase responsible for N4-acetylcytidine (ac4C) modification of various RNAs. Our study reveals that NAT10 loss significantly reduces lung metastasis in breast cancer mouse models. NAT10 interacts with a mechanosensitive, metastasis-susceptibility protein complex at the nuclear pore. Mechanistically, NAT10-mediated acetylation of chromatin-associated tRNAs enhances p300/CBP activity. Without NAT10, acetylation of these tRNAs decreases, leading to p300/CBP inactivation and mislocalization. As a result, NAT10 depletion disrupts enhancer organization, altering gene transcription critical for metastasis, including reduced chemokines that recruit myeloid cells and create a less metastasis-prone tumor microenvironment. Our findings highlight the distinct role of NAT10 in acetylated tRNA-dependent regulation of enhancer function in metastatic tumor cells and its impact on tumor-immune interactions influencing metastasis.

ORGANISM(S): Mus musculus

PROVIDER: GSE280504 | GEO | 2025/11/17

REPOSITORIES: GEO

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NAT10 promotes cancer metastasis by modulating p300/CBP activity through chromatin-associated tRNA [ChIP-seq]

Project description:Acetylation of proteins and RNA is crucial for development and cancer progression. NAT10 is the sole RNA acetylase responsible for N4-acetylcytidine (ac4C) modification of various RNAs. Our study reveals that NAT10 loss significantly reduces lung metastasis in breast cancer mouse models. NAT10 interacts with a mechanosensitive, metastasis-susceptibility protein complex at the nuclear pore. Mechanistically, NAT10-mediated acetylation of chromatin-associated tRNAs enhances p300/CBP activity. Without NAT10, acetylation of these tRNAs decreases, leading to p300/CBP inactivation and mislocalization. As a result, NAT10 depletion disrupts enhancer organization, altering gene transcription critical for metastasis, including reduced chemokines that recruit myeloid cells and create a less metastasis-prone tumor microenvironment. Our findings highlight the distinct role of NAT10 in acetylated tRNA-dependent regulation of enhancer function in metastatic tumor cells and its impact on tumor-immune interactions influencing metastasis.

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