RNA-cleaving properties of human apurinic/apyrimidinic endonuclease 1 (APE1)
Identifieur interne : 001460 ( Main/Exploration ); précédent : 001459; suivant : 001461RNA-cleaving properties of human apurinic/apyrimidinic endonuclease 1 (APE1)
Auteurs : Wan-Cheol Kim ; Dustin King ; Chow H. LeeSource :
- International Journal of Biochemistry and Molecular Biology [ 2152-4114 ] ; 2010.
Abstract
We have recently identified apurinic/apyrimidinic endonuclease 1 (APE1) as an endoribonuclease that cleaves c-
Url:
PubMed: 21968700
PubMed Central: 3180037
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en"><p>We have recently identified apurinic/apyrimidinic endonuclease 1 (APE1) as an endoribonuclease that cleaves c-<italic>myc</italic>
mRNA <italic>in vitro</italic>
and regulates c-<italic>myc</italic>
mRNA levels and half-life in cells. This study was undertaken to further unravel the RNA-cleaving properties of APE1. Here, we show that APE1 cleaves RNA in the absence of divalent metal ions and, at 2 mM, Zn<sup>2+</sup>
, Ni<sup>2+</sup>
, Cu<sup>2+</sup>
, or Co<sup>2+</sup>
inhibited the endoribonuclease activity of APE1. APE1 is able to cleave CD44 mRNA, microRNAs (miR-21, miR-10b), and three RNA components of SARS-corona virus (orf1b, orf3, spike) suggesting that, when challenged, it can cleave any RNAs <italic>in vitro</italic>
. APE1 does not cleave strong doublestranded regions of RNA and it has a strong preference for 3’ of pyrimidine, especially towards UA, CA, and UG sites at single-stranded or weakly paired regions. It also cleaves RNA weakly at UC, CU, AC, and AU sites in single-stranded or weakly paired regions. Finally, we found that APE1 can reduce the ability of the Dicer enzyme to process premiRNAs <italic>in vitro</italic>
. Overall, this study has revealed some previously unknown biochemical properties of APE1 which has implications for its role <italic>in vivo</italic>
.</p>
</div>
</front>
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<name sortKey="Lee, Chow H" sort="Lee, Chow H" uniqKey="Lee C" first="Chow H." last="Lee">Chow H. Lee</name>
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