Reactome | TP53 Regulates Transcription of Genes Involved in G1 Cell Cycle Arrest

TP53 Regulates Transcription of Genes Involved in G1 Cell Cycle Arrest

Stable Identifier

R-HSA-6804116

Type

Pathway

Species

Homo sapiens

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TP53 Regulates Transcription of Genes Involved in G1 Cell Cycle Arrest

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The most prominent TP53 target involved in G1 arrest is the inhibitor of cyclin-dependent kinases CDKN1A (p21). CDKN1A is one of the earliest genes induced by TP53 (El-Deiry et al. 1993). CDKN1A binds and inactivates CDK2 in complex with cyclin A (CCNA) or E (CCNE), thus preventing G1/S transition (Harper et al. 1993). Considering its impact on the cell cycle outcome, CDKN1A expression levels are tightly regulated. For instance, under prolonged stress, TP53 can induce the transcription of an RNA binding protein PCBP4, which can bind and destabilize CDKN1A mRNA, thus alleviating G1 arrest and directing the affected cell towards G2 arrest and, possibly, apoptosis (Zhu and Chen 2000, Scoumanne et al. 2011). Expression of E2F7 is directly induced by TP53. E2F7 contributes to G1 cell cycle arrest by repressing transcription of E2F1, a transcription factor that promotes expression of many genes needed for G1/S transition (Aksoy et al. 2012, Carvajal et al. 2012). ARID3A is a direct transcriptional target of TP53 (Ma et al. 2003) that may promote G1 arrest by cooperating with TP53 in induction of CDKN1A transcription (Lestari et al. 2012). However, ARID3A may also promote G1/S transition by stimulating transcriptional activity of E2F1 (Suzuki et al. 1998, Peeper et al. 2002).

TP53 has co-factors that are key determinants of transcriptional selectivity within the p53 network. For instance, the zinc finger transcription factor ZNF385A (HZF) is a direct transcriptional target of TP53 that can form a complex with TP53 and facilitate TP53-mediated induction of CDKN1A, strongly favouring cell cycle arrest over apoptosis (Das et al. 2007).

Literature References

PubMed ID	Title	Journal	Year
8242752	WAF1, a potential mediator of p53 tumor suppression. el-Deiry, WS, Tokino, T, Velculescu, VE, Levy, DB, Parsons, R, Trent, JM, Lin, D, Mercer, WE, Kinzler, KW, Vogelstein, B	Cell	1993
22802528	E2F7, a novel target, is up-regulated by p53 and mediates DNA damage-dependent transcriptional repression Carvajal, LA, Hamard, PJ, Tonnessen, C, Manfredi, JJ	Genes Dev.	2012
17719541	Hzf Determines cell survival upon genotoxic stress by modulating p53 transactivation Das, S, Raj, L, Zhao, B, Kimura, Y, Bernstein, A, Aaronson, SA, Lee, SW	Cell	2007
22802529	The atypical E2F family member E2F7 couples the p53 and RB pathways during cellular senescence Aksoy, O, Chicas, A, Zeng, T, Zhao, Z, McCurrach, M, Wang, X, Lowe, SW	Genes Dev.	2012
8242751	The p21 Cdk-interacting protein Cip1 is a potent inhibitor of G1 cyclin-dependent kinases. Harper, JW, Adami, GR, Wei, N, Keyomarsi, K, Elledge, SJ	Cell	1993
12692263	E2FBP1/DRIL1, an AT-rich interaction domain-family transcription factor, is regulated by p53 Ma, K, Araki, K, Ichwan, SJ, Suganuma, T, Tamamori-Adachi, M, Ikeda, MA	Mol. Cancer Res.	2003
20817677	The cyclin-dependent kinase inhibitor p21 is regulated by RNA-binding protein PCBP4 via mRNA stability Scoumanne, A, Cho, SJ, Zhang, J, Chen, X	Nucleic Acids Res.	2011
10891498	MCG10, a novel p53 target gene that encodes a KH domain RNA-binding protein, is capable of inducing apoptosis and cell cycle arrest in G(2)-M Zhu, J, Chen, X	Mol. Cell. Biol.	2000
22172947	Cooperation between ARID3A and p53 in the transcriptional activation of p21WAF1 in response to DNA damage Lestari, W, Ichwan, SJ, Otsu, M, Yamada, S, Iseki, S, Shimizu, S, Ikeda, MA	Biochem. Biophys. Res. Commun.	2012
11812999	A functional screen identifies hDRIL1 as an oncogene that rescues RAS-induced senescence Peeper, DS, Shvarts, A, Brummelkamp, T, Douma, S, Koh, EY, Daley, GQ, Bernards, R	Nat. Cell Biol.	2002
9780002	A novel E2F binding protein with Myc-type HLH motif stimulates E2F-dependent transcription by forming a heterodimer Suzuki, M, Okuyama, S, Okamoto, S, Shirasuna, K, Nakajima, T, Hachiya, T, Nojima, H, Sekiya, S, Oda, K	Oncogene	1998