Work

Molecular Characterization of a Chromosomal Rearrangement Involved in the Adaptive Evolution of Yeast Strains

Year: 2002

Type: preprint

Abstract: Wine yeast strains show a high level of chromosome length polymorphism. This polymorphism is mainly generated by illegitimate recombination mediated by Ty transposons or subtelomeric repeated sequences. We have found, however, that the SSU1-R allele, which confers sulfite resistance to yeast cells, is the product of a reciprocal translocation between chromosomes VIII and XVI due to unequal crossing-over mediated by microhomology between very short sequences on the 5′ upstream regions of the SSU1 andECM34 genes. We also show that this translocation is only present in wine yeast strains, suggesting that the use for millennia of sulfite as a preservative in wine production could have favored its selection. This is the first time that a gross chromosomal rearrangement is shown to be involved in the adaptive evolution ofSaccharomyces cerevisiae. [The sequence data from this study have been submitted to EMBL under accession nos. AF239757 , AF239758 , and AJ458340 – AJ458367 . The following individual kindly provided reagents, samples, or unpublished information as indicated in the paper: N. Goto-Yamamoto.]

Source: Genome Research

DOI: 10.1101/gr.436602

Authors: José E. Pérez-Ortı́n, Amparo Querol, Sergi Puig, Eladio Barrio

Institutions: Consejo Superior de Investigaciones Científicas, Universitat de València, Instituto de Agroquímica y Tecnología de Alimentos

Language: English

Topic: Fungal and yeast genetics research

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: bronze

Funders: European Commission, Generalitat Valenciana

Award: G6401670093