The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
Topors Functions as an E3 Ubiquitin Ligase with Specific E2 Enzymes and Ubiquitinates p53
Open accessAbstract
The human topoisomerase I- and p53-binding protein topors contains a highly conserved, N-terminal C3HC4-type RING domain that is homologous to the RING domains of known E3 ubiquitin ligases. We demonstrate that topors functions in vitro as a RING-dependent E3 ubiquitin ligase with the E2 enzymes UbcH5a, UbcH5c, and UbcH6 but not with UbcH7, CDC34, or UbcH2b. Additional studies indicate that a conserved tryptophan within the topors RING domain is required for ubiquitination activity. Furthermore, both in vitro and cellular studies implicate p53 as a ubiquitination substrate for topors. Similar to MDM2, overexpression of topors results in a proteasome-dependent decrease in p53 protein expression in a human osteosarcoma cell line. These results are similar to the recent finding that a Drosophila topors orthologue ubiquitinates the Hairy transcriptional repressor and suggest that topors functions as a ubiquitin ligase for multiple transcription factors.
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Cites
Mdm2 promotes the rapid degradation of p53
Haupt, Y., Maya, R., Kazaz, A., & Oren, M. (1997) · Nature · doi:10.1038/387296a0 · Cited by 4,506
Regulation of p53 stability by Mdm2
Kubbutat, M. H. G., Jones, S. N., & Vousden, K. H. (1997) · Nature · doi:10.1038/387299a0 · Cited by 3,312
Oncoprotein MDM2 is a ubiquitin ligase E3 for tumor suppressor p53
Honda, R., Tanaka, H., & Yasuda, H. (1997) · FEBS Letters · doi:10.1016/s0014-5793(97)01480-4 · Cited by 1,951
Boutell, C., Sadis, S., & Everett, R. D. (2002) · Journal of Virology · doi:10.1128/jvi.76.2.841-850.2002 · Cited by 386
Control of biochemical reactions through supramolecular RING domain self-assembly
Kentsis, A., Gordon, R. E., & Borden, K. L. B. (2002) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.202608799 · Cited by 112
Cited by
The p53 pathway: positive and negative feedback loops
Harris, S. L., & Levine, A. J. (2005) · Oncogene · doi:10.1038/sj.onc.1208615 · Cited by 1,967
p53 ubiquitination: Mdm2 and beyond
Brooks, C. L., & Gu, W. (2006) · Molecular Cell · doi:10.1016/j.molcel.2006.01.020 · Cited by 924
The complexity of p53 stabilization and activation
Lavin, M. F., & Gueven, N. (2006) · Cell Death & Differentiation · doi:10.1038/sj.cdd.4401925 · Cited by 701
Coping with stress: multiple ways to activate p53
Horn, H. F., & Vousden, K. H. (2007) · Oncogene · doi:10.1038/sj.onc.1210263 · Cited by 522
Regulating tumor suppressor genes: post-translational modifications
Chen, L., Liu, S., & Tao, Y. (2020) · Signal Transduction and Targeted Therapy · doi:10.1038/s41392-020-0196-9 · Cited by 449
Metadata
- Authors
- Rajendra, R., Malegaonkar, D., Pungaliya, P., Marshall, H., Rasheed, Z., Brownell, J., Liu, L. F., Lutzker, S., Saleem, A., & Rubin, E. H.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 2004-08
- Volume
- 279
- Issue
- 35
- Pages
- 36440-36444
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W2069078243
- Cited by
- 194
- References
- 5
- FWCI
- 4.26
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Rajendra, R., Malegaonkar, D., Pungaliya, P., Marshall, H., Rasheed, Z., Brownell, J., Liu, L. F., Lutzker, S., Saleem, A., & Rubin, E. H. (2004). Topors Functions as an E3 Ubiquitin Ligase with Specific E2 Enzymes and Ubiquitinates p53. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.c400300200
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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