A new system for comparative functional genomics of Saccharomyces yeasts

Whole-genome sequencing, particularly in fungi, has progressed at a tremendous rate. More difficult, however, is experimental testing of the inferences about gene function that can be drawn from comparative sequence analysis alone. We present a genome-wide functional characterization of a sequenced...

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Published in:Genetics (Austin) 2013-09, Vol.195 (1), p.275-287
Main Authors: Caudy, Amy A, Guan, Yuanfang, Jia, Yue, Hansen, Christina, DeSevo, Chris, Hayes, Alicia P, Agee, Joy, Alvarez-Dominguez, Juan R, Arellano, Hugo, Barrett, Daniel, Bauerle, Cynthia, Bisaria, Namita, Bradley, Patrick H, Breunig, J Scott, Bush, Erin, Cappel, David, Capra, Emily, Chen, Walter, Clore, John, Combs, Peter A, Doucette, Christopher, Demuren, Olukunle, Fellowes, Peter, Freeman, Sam, Frenkel, Evgeni, Gadala-Maria, Daniel, Gawande, Richa, Glass, David, Grossberg, Samuel, Gupta, Anita, Hammonds-Odie, Latanya, Hoisos, Aaron, Hsi, Jenny, Hsu, Yu-Han Huang, Inukai, Sachi, Karczewski, Konrad J, Ke, Xiaobo, Kojima, Mina, Leachman, Samuel, Lieber, Danny, Liebowitz, Anna, Liu, Julia, Liu, Yufei, Martin, Trevor, Mena, Jose, Mendoza, Rosa, Myhrvold, Cameron, Millian, Christian, Pfau, Sarah, Raj, Sandeep, Rich, Matt, Rokicki, Joe, Rounds, William, Salazar, Michael, Salesi, Matthew, Sharma, Rajani, Silverman, Sanford, Singer, Cara, Sinha, Sandhya, Staller, Max, Stern, Philip, Tang, Hanlin, Weeks, Sharon, Weidmann, Maxwell, Wolf, Ashley, Young, Carmen, Yuan, Jie, Crutchfield, Christopher, McClean, Megan, Murphy, Coleen T, Llinás, Manuel, Botstein, David, Troyanskaya, Olga G, Dunham, Maitreya J
Format: Article
Language:English
Subjects:
Fungal Proteins - genetics
Fungal Proteins - metabolism
Gene expression
Gene Expression Profiling
Genes
Genetic research
Genome, Fungal
Genomics
Investigations
Molecular Sequence Annotation
Oxidative Stress
Saccharomyces
Saccharomyces - genetics
Saccharomyces - metabolism
Saccharomyces bayanus
Saccharomyces cerevisiae
Yeast
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Summary:Whole-genome sequencing, particularly in fungi, has progressed at a tremendous rate. More difficult, however, is experimental testing of the inferences about gene function that can be drawn from comparative sequence analysis alone. We present a genome-wide functional characterization of a sequenced but experimentally understudied budding yeast, Saccharomyces bayanus var. uvarum (henceforth referred to as S. bayanus), allowing us to map changes over the 20 million years that separate this organism from S. cerevisiae. We first created a suite of genetic tools to facilitate work in S. bayanus. Next, we measured the gene-expression response of S. bayanus to a diverse set of perturbations optimized using a computational approach to cover a diverse array of functionally relevant biological responses. The resulting data set reveals that gene-expression patterns are largely conserved, but significant changes may exist in regulatory networks such as carbohydrate utilization and meiosis. In addition to regulatory changes, our approach identified gene functions that have diverged. The functions of genes in core pathways are highly conserved, but we observed many changes in which genes are involved in osmotic stress, peroxisome biogenesis, and autophagy. A surprising number of genes specific to S. bayanus respond to oxidative stress, suggesting the organism may have evolved under different selection pressures than S. cerevisiae. This work expands the scope of genome-scale evolutionary studies from sequence-based analysis to rapid experimental characterization and could be adopted for functional mapping in any lineage of interest. Furthermore, our detailed characterization of S. bayanus provides a valuable resource for comparative functional genomics studies in yeast.
ISSN:1943-2631
0016-6731
1943-2631
DOI:10.1534/genetics.113.152918