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FEBS Lett. 2009 Sep 3;583(17):2843-8. doi: 10.1016/j.febslet.2009.07.042. Epub 2009 Jul 30.

Involvement of Pta1, Pcf11 and a KlCYC1 AU-rich element in alternative RNA 3'-end processing selection in yeast.

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Universidade da Coruña, Facultad de Ciencias, Campus da Zapateira S/N, 15071 A Coruña, Spain.


This work reports the involvement of yeast RNA processing factors Pta1 and Pcf11 in alternative 3'-end RNA processing. The pta1-1 and pcf11-2 mutations changed the predominance of KlCYC1 1.14 and 1.5 kb transcript isoforms. Mutation of the KlCYC1 3'-UTR AU-rich sequence at positions 679-690 (mutant M1) altered transcript predominance. Moreover, expression of M1 in the yeast mutants partially suppressed their effects in the predominance pattern. The combination of the M1 and M2 (694-698 deletion) mutations abolished the alternative processing. Pta1 involvement in this selection was confirmed using the Pta1-td degron strain.

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