Cited by 235Chromosomal and Genetic VariationsFungal and yeast genetics researchDNA Repair Mechanisms

Multiple Regulators of Ty1 Transposition in Saccharomyces cerevisiae Have Conserved Roles in Genome Maintenance

Scholes, Derek T, Banerjee, Mukti, Bowen, Brian, Curcio, M Joan·2001·Genetics

Abstract

Most Ty1 retrotransposons in the genome of Saccharomyces cerevisiae are transpositionally competent but rarely transpose. We screened yeast mutagenized by insertion of the mTn3-lacZ/LEU2 transposon for mutations that result in elevated Ty1 cDNA-mediated mobility, which occurs by cDNA integration or recombination. Here, we describe the characterization of mTn3 insertions in 21 RTT (regulation of Ty1 transposition) genes that result in 5- to 111-fold increases in Ty1 mobility. These 21 RTT genes are EST2, RRM3, NUT2, RAD57, RRD2, RAD50, SGS1, TEL1, SAE2, MED1, MRE11, SCH9, KAP122, and 8 previously uncharacterized genes. Disruption of RTT genes did not significantly increase Ty1 RNA levels but did enhance Ty1 cDNA levels, suggesting that most RTT gene products act at a step after mRNA accumulation but before cDNA integration. The rtt mutations had widely varying effects on integration of Ty1 at preferred target sites. Mutations in RTT101 and NUT2 dramatically stimulated Ty1 integration upstream of tRNA genes. In contrast, a mutation in RRM3 increased Ty1 mobility >100-fold without increasing integration upstream of tRNA genes. The regulation of Ty1 transposition by components of fundamental pathways required for genome maintenance suggests that Ty1 and yeast have coevolved to link transpositional dormancy to the integrity of the genome.

Integrity signals

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Crossref · 10.1093/genetics/159.4.1449

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  • An increase in mRNA levels of 'Transposition' genes such as retrotransposons is probably linked to the effect of Rtt106 as a Regulator of Ty1 Transposition (RTT).

    “An increase in mRNA levels of ‘Transposition’ genes such as retrotransposons (Fig. 3b) is probably linked to the effect of Rtt106 as a Regulator of Ty1 Transposition (RTT)43, the phenotype for which Rtt106 was originally identified.”

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Authors
Scholes, D. T., Banerjee, M., Bowen, B., & Curcio, M. J.
Affiliations
State University of New York (US)
Corresponding author
Curcio, M Joan
Venue
Genetics
Published
2001-12-01
Volume
159
Issue
4
Pages
1449-1465
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2101107183
Cited by
235
References
85
Citations by year
2026: 2 · 2025: 2 · 2024: 5 · 2023: 5 · 2022: 5 · 2021: 6 · 2020: 6 · 2019: 8 · 2018: 6 · 2017: 9 · 2016: 13 · 2015: 11 · 2014: 6 · 2013: 10 · 2012: 11
FWCI
14.60
Type
journal article
Language
en
Open access
closed
Locations
  • Genetics (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of General Medical Sciences (R01GM052072, GM-52072)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
Keywords
Ty1 retrotransposon, transposition regulation, genome maintenance, RRM3, tRNA genes, Saccharomyces cerevisiae
MeSH terms
DNA Damage, Genes, Fungal, Models, Genetic, Mutation, Plasmids, RNA, Saccharomyces cerevisiae, Transcription, Genetic, Blotting, Northern, Mutagenesis, Telomere, Genome, DNA, Complementary, Retroelements

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