دورية أكاديمية

SIRT1 Undergoes Alternative Splicing in a Novel Auto-Regulatory Loop with p53

التفاصيل البيبلوغرافية
العنوان: SIRT1 Undergoes Alternative Splicing in a Novel Auto-Regulatory Loop with p53
المؤلفون: Blagosklonny, Mikhail V., Lynch, Cian J., Shah, Zahid H., Allison, Simon J., Ahmed, Shafiq U., Ford, Jack, Warnock, Lorna J., Li, Han, Serrano, Manuel, Milner, Jo
بيانات النشر: PLoS ONE
سنة النشر: 2010
المجموعة: University of Huddersfield Repository
مصطلحات موضوعية: Q Science (General)
الوصف: Background The NAD-dependent deacetylase SIRT1 is a nutrient-sensitive coordinator of stress-tolerance, multiple homeostatic processes and healthspan, while p53 is a stress-responsive transcription factor and our paramount tumour suppressor. Thus, SIRT1-mediated inhibition of p53 has been identified as a key node in the common biology of cancer, metabolism, development and ageing. However, precisely how SIRT1 integrates such diverse processes remains to be elucidated. Methodology/Principal Findings Here we report that SIRT1 is alternatively spliced in mammals, generating a novel SIRT1 isoform: SIRT1-ΔExon8. We show that SIRT1-ΔExon8 is expressed widely throughout normal human and mouse tissues, suggesting evolutionary conservation and critical function. Further studies demonstrate that the SIRT1-ΔExon8 isoform retains minimal deacetylase activity and exhibits distinct stress sensitivity, RNA/protein stability, and protein-protein interactions compared to classical SIRT1-Full-Length (SIRT1-FL). We also identify an auto-regulatory loop whereby SIRT1-ΔExon8 can regulate p53, while in reciprocal p53 can influence SIRT1 splice variation. Conclusions/Significance We characterize the first alternative isoform of SIRT1 and demonstrate its evolutionary conservation in mammalian tissues. The results also reveal a new level of inter-dependency between p53 and SIRT1, two master regulators of multiple phenomena. Thus, previously-attributed SIRT1 functions may in fact be distributed between SIRT1 isoforms, with important implications for SIRT1 functional studies and the current search for SIRT1-activating therapeutics to combat age-related decline.
نوع الوثيقة: article in journal/newspaper
وصف الملف: application/pdf
اللغة: English
العلاقة: https://eprints.hud.ac.uk/id/eprint/27406/1/journal.pone.0013502%20%281%29.PDFTest; Blagosklonny, Mikhail V., Lynch, Cian J., Shah, Zahid H., Allison, Simon J., Ahmed, Shafiq U., Ford, Jack, Warnock, Lorna J., Li, Han, Serrano, Manuel and Milner, Jo (2010) SIRT1 Undergoes Alternative Splicing in a Novel Auto-Regulatory Loop with p53. PLoS ONE, 5 (10). e13502. ISSN 1932-6203
DOI: 10.1371/journal.pone.0013502
الإتاحة: https://doi.org/10.1371/journal.pone.0013502Test
http://eprints.hud.ac.uk/id/eprint/27406Test/
https://eprints.hud.ac.uk/id/eprint/27406/1/journal.pone.0013502%20%281%29.PDFTest
حقوق: cc_by
رقم الانضمام: edsbas.9A2E45BD
قاعدة البيانات: BASE