Abstract

Understanding the genetic basis of gene regulatory variation is a key goal of evolutionary and medical genetics. Regulatory variation can act in an allele-specific manner (cis-acting) or it can affect both alleles of a gene (trans-acting). Differential allele-specific expression (ASE), in which the expression of one allele differs from another in a diploid, implies the presence of cis-acting regulatory variation. While microarrays and high-throughput sequencing have enabled genome-wide measurements of transcriptional ASE, methods for measurement of protein ASE (pASE) have lagged far behind. We describe a flexible, accurate, and scalable strategy for measurement of pASE by liquid chromatography-coupled mass spectrometry (LC-MS). We apply this approach to a hybrid between the yeast species Saccharomyces cerevisiae and Saccharomyces bayanus. Our results provide the first analysis of the relative contribution of cis-acting and trans-acting regulatory differences to protein expression divergence between yeast species.

Details

Title
Quantitative measurement of allele-specific protein expression in a diploid yeast hybrid by LC-MS
Author
Khan, Zia 1 ; Bloom, Joshua S 2 ; Amini, Sasan 2 ; Singh, Mona 1 ; Perlman, David H 3 ; Caudy, Amy A 4 ; Kruglyak, Leonid 5 

 Department of Computer Science, Princeton University, Princeton, NJ, USA; Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA 
 Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA; Department of Molecular Biology, Princeton University, Princeton, NJ, USA 
 Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA; Department of Molecular Biology, Princeton University, Princeton, NJ, USA; Princeton Mass Spectrometry Center, Princeton University, Princeton, NJ, USA 
 Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA 
 Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA; Howard Hughes Medical Institute, Princeton University, Princeton, NJ, USA 
Section
Article
Publication year
2012
Publication date
2012
Publisher
EMBO Press
e-ISSN
17444292
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2299171174
Copyright
© 2012. This work is published under http://creativecommons.org/licenses/by-nc-sa/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.