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A minor class of 5S rRNA genes in Saccharomyces cerevisiae X2180-1B, one member of which lies adjacent to a Ty transposable element.

Abstract：

:In Saccharomyces cerevisiae the majority of the genes for 5S rRNA lie within a 9kb rDNA sequence that is present as 100-200 tandemly-repeated copies on Chromosome XII. Following our observations that about 10% of yeast 5S rRNA exists as minor variant sequences, we screened a collection of yeast DNA fragments cloned in lambda gt for 5S rRNA genes whose flanking sequences differed from those adjacent to 5S rRNA genes of the rDNA repeat. Three variant 5S rRNA genes were isolated on the basis of such dissimilarity to rDNA repeat sequences. They display a remarkable conservation of their DNA in the vicinity of the 5S coding region, and are examples of a minor form of 5S rRNA coding sequence present in a small number of copies in the yeast genome. These variant sequences appear to be transcribed as efficiently as 5S rRNA genes of the rDNA repeat. In one of our isolates of the variant sequence a Ty transposable element is inserted 145bp upstream of the initiation point for 5S rRNA synthesis.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Piper PW,Lockheart A,Patel N

doi

10.1093/nar/12.10.4083

subject

Has Abstract

pub_date

1984-05-25 00:00:00

pages

4083-96

issue

10

eissn

0305-1048

issn

1362-4962

journal_volume

12

pub_type

杂志文章

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