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Cloning and characterization of Arabidopsis homologues of the animal CstF complex that regulates 3′ mRNA cleavage and polyadenylation

Youli Yao, Luhua Song, Yael Katz and Gad Galili
Journal of Experimental Botany
Vol. 53, No. 378 (November 2002), pp. 2277-2278
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/23697633
Page Count: 2
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Abstract

The 3′ cleavage and polyadenylation of mRNAs has been studied in detail in animals and yeast, but not in plants. Aimed at elucidating the regulation of mRNA 3′ end formation in plants, three Arabidopsis cDNAs encoding homologues of the animal proteins CstF-64, CstF-77 and CstF-50 that form the cleavage stimulating factor of the polyadenylation machinery have been cloned. It is shown experimentally that the N-terminal domain of the Arabidopsis CstF-64 homologue binds the mRNA 3′ non-coding region in an analogous manner to the animal protein. It is also shown that the Arabidopsis CstF-64 and CstF-77 homologues strongly interact with each other in a similar way to their animal counterparts. These results imply that these Arabidopsis homologues belong to the polyadenylation machinery of nuclear mRNAs.

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