Reference: Lee M, et al. (1986) Conserved regions in defective interfering viral double-stranded RNAs from a yeast virus. J Virol 58(2):402-7

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Abstract


We have completely sequenced a defective interfering viral double-stranded RNA (dsRNA) from the Saccharomyces cerevisiae virus. This RNA (S14) is a simple internal deletion of its parental dsRNA, M1, of 1.9 kilobases. The 5' 964 bases of the M1 plus strand encode the type 1 killer toxin of the yeast. S14 is 793 base pairs (bp) long, with 253 bp from the 5' region of its parental plus strand and 540 bp from the 3' region. All three defective interfering RNAs derived from M1 that have been characterized so far preserve a large 3' region, which includes five repeats of a rotationally symmetrical 11-bp consensus sequence. This 11-bp sequence is not present in the 5' 1 kilobase of the parental RNA or in any of the sequenced regions of unrelated yeast viral dsRNAs, but it is present in the 3' region of the plus strand of another yeast viral dsRNA, M2, that encodes the type 2 killer toxin. The 3' region of 550 bases of the M1 plus strand, previously only partially sequenced, reveals no large open reading frames. Hence only about half of M1 appears to have a coding function.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S.
Authors
Lee M, Pietras DF, Nemeroff ME, Corstanje BJ, Field LJ, Bruenn JA
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