Edited by Ulrike Kutay
Keywords:Alternative polyadenylation 3 0 -UTR Pta1 Pcf11 Yeast a b s t r a c t This work reports the involvement of yeast RNA processing factors Pta1 and Pcf11 in alternative 3 0 -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 0 -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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