| Literature DB >> 12640128 |
Masayuki Kanai1, Wei-Min Tong, Eiji Sugihara, Zhao-Qi Wang, Kenji Fukasawa, Masanao Miwa.
Abstract
The regulatory mechanism of centrosome function is crucial to the accurate transmission of chromosomes to the daughter cells in mitosis. Recent findings on the posttranslational modifications of many centrosomal proteins led us to speculate that these modifications might be involved in centrosome behavior. Poly(ADP-ribose) polymerase 1 (PARP-1) catalyzes poly(ADP-ribosyl)ation to various proteins. We show here that PARP-1 localizes to centrosomes and catalyzes poly(ADP-ribosyl)ation of centrosomal proteins. Moreover, centrosome hyperamplification is frequently observed with PARP inhibitor, as well as in PARP-1-null cells. Thus, it is possible that chromosomal instability known in PARP-1-null cells can be attributed to the centrosomal dysfunction. P53 tumor suppressor protein has been also shown to be localized at centrosomes and to be involved in the regulation of centrosome duplication and monitoring of the chromosomal stability. We found that centrosomal p53 is poly(ADP-ribosyl)ated in vivo and centrosomal PARP-1 directly catalyzes poly(ADP-ribosyl)ation of p53 in vitro. These results indicate that PARP-1 and PARP-1-mediated poly(ADP-ribosyl)ation of centrosomal proteins are involved in the regulation of centrosome function.Entities:
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Year: 2003 PMID： 12640128 PMCID： PMC150716 DOI： 10.1128/MCB.23.7.2451-2462.2003
Source DB: PubMed Journal: Mol Cell Biol ISSN： 0270-7306 Impact factor: 4.272