Abstract
TP53, the most frequently mutated gene in human cancer, encodes a transcriptional activator that induces myriad downstream target genes. Despite the importance of p53 in tumor suppression, the specific p53 target genes important for tumor suppression remain unclear. Recent studies have identified the p53-inducible gene Zmat3 as a critical effector of tumor suppression, but many questions remain regarding its p53-dependence, activity across contexts, and mechanism of tumor suppression alone and in cooperation with other p53-inducible genes. To address these questions, we used Tuba-seqUltra somatic genome editing and tumor barcoding in a mouse lung adenocarcinoma model, combinatorial in vivo CRISPR/Cas9 screens, meta-analyses of gene expression and Cancer Dependency Map data, and integrative RNA-sequencing and shotgun proteomic analyses. We established Zmat3 as a core component of p53-mediated tumor suppression and identified Cdkn1a as the most potent cooperating p53-induced gene in tumor suppression. We discovered that ZMAT3/CDKN1A serve as near-universal effectors of p53-mediated tumor suppression that regulate cell division, migration, and extracellular matrix organization. Accordingly, combined Zmat3-Cdkn1a inactivation dramatically enhanced cell proliferation and migration compared to controls, akin to p53 inactivation. Together, our findings place ZMAT3 and CDKN1A as hubs of a p53-induced gene program that opposes tumorigenesis across various cellular and genetic contexts.
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Data availability
The RNA sequencing data are available from the GEO under the accession number GSE289471 (https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE289471). The mass spectrometry proteomics data have been deposited to the ProteomeXchange Consortium via the PRIDE [61] partner repository with the dataset identifier PXD047240 and 10.6019/PXD047240. For DepMap analyses, somatic mutations, copy number status, CRISPR gene effect scores, gene expression, and cell line metadata files were downloaded from the DepMap Public 23Q4 Primary Files release. Previously published data on p53-dependent gene regulation were retrieved from www.TargetGeneReg.org [31], which contains 15 mouse and 57 human transcription profiling datasets. Additionally, genome-wide data on p53 binding were available from 9 curated ChIP datasets derived from mouse cells [33] and 28 ChIP datasets from human cells [62]. All other data supporting the findings of this study are in the article, supplemental information, or are available from the corresponding author upon reasonable request. Source data are provided in this paper.
Code availability
All code required to download, process, and visualize DepMap analyses is provided at https://github.com/brooksbenard/tp53_p21_zmat3/tree/main.
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Acknowledgements
We thank Julien Sage for critical reading of the manuscript and Sydney Lu, Scott Dixon, and Camila Bolle for important discussions. We thank Mingxin Gu for her assistance with the in vivo screens. We thank Nitin Raj, Sofia Ferreira, and Kathryn Hanson for advice on RNA-sequencing. We thank Richard Frock for the use of his transilluminator and SpeedVac and Laura Andrejka for assistance with Tuba-seqUltra. We apologize to those whose work we could not cite due to spatial constraints.
Funding
This work was supported by Tobacco-Related Disease Research Program (TRDRP) fellowship T31DT1713, NIH T32CA009302 to AMB, NIH-R01CA234349 to DAP and MMW, and NIH R35CA197591 and TRDRP grant 28IP-0037 to LDA.
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AMB and LDA designed experiments and interpreted the results. AMB performed experiments and analyzed data. ARM and EMM conducted experiments. DY conducted casTLE analysis on sgRNA screens. HX, MW, YJT, and SSL performed Tuba-seqUltra pipeline. JD and RC processed and analyzed shotgun proteomics samples. LJV designed the sgRNA library. BAB performed analyses of DepMap data. SS performed and analyzed 3D migration experiments. MF conducted meta-analysis of p53-dependent gene expression and ChIP-seq binding. FY helped interpret 3D migration experiments. RM helped interpret DepMap data. PKJ helped interpret shotgun proteomics data. DAP and MMW helped interpret Tuba-seqUltra data. MCB helped interpret sgRNA screen results. AMB and LDA wrote the manuscript.
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RM is on the Advisory Boards of Kodikaz Therapeutic Solutions, Orbital Therapeutics, Pheast Therapeutics, 858 Therapeutics, Prelude Therapeutics, Mubadala Capital, and Aculeus Therapeutics. RM is a co-founder and equity holder of Pheast Therapeutics, MyeloGene, and Orbital Therapeutics. The other authors declare no competing interest.
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All animal experiments were performed in accordance with the Stanford University Administrative Panel on Laboratory Animal Care (protocol number 10382) guidelines and regulations. Mice (Mus musculus) were maintained at Stanford University’s Comparative Medicine Pavilion and Research Animal Facility according to practices prescribed by the National Institutes of Health and the Institutional Animal Care and Use Committee (IACUC). The Association for Assessment and Accreditation of Laboratory Animal Care provides additional accreditation to Stanford University.
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Boutelle, A.M., Mabene, A.R., Yao, D. et al. Integrative multiomic approaches reveal ZMAT3 and p21 as conserved hubs in the p53 tumor suppression network. Cell Death Differ (2025). https://doi.org/10.1038/s41418-025-01513-8
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DOI: https://doi.org/10.1038/s41418-025-01513-8