Journal of Molecular Evolution

, Volume 70, Issue 1, pp 69–73

The Enrichment of TATA Box and the Scarcity of Depleted Proximal Nucleosome in the Promoters of Duplicated Yeast Genes

Article

DOI: 10.1007/s00239-009-9309-3

Cite this article as:
Kim, Y., Lee, J.H. & Babbitt, G.A. J Mol Evol (2010) 70: 69. doi:10.1007/s00239-009-9309-3

Abstract

Population genetic theory of gene duplication suggests that the preservation of duplicate copies requires functional divergence upon duplication. Genes that can be readily modified to produce new gene expression patterns may thus be duplicated often. In yeast, genes exhibit dichotomous expression patterns based on their promoter architectures. The expression of genes that contain TATA box or occupied proximal nucleosome (OPN) tends to be variable and respond to external signals. On the other hand, genes without TATA box or with depleted proximal nucleosome (DPN) are expressed constitutively. We find that recent duplicates in the yeast genome are heavily biased to be TATA box containing genes and not to be DPN genes. This suggests that variably expressed genes, due to the functional organization in their promoters, have higher duplicability than constitutively expressed genes.

Keywords

Gene duplicationTATA boxNucleosomeTranscription plasticityYeast

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Yuseob Kim
    • 1
    • 2
  • Jang H. Lee
    • 2
  • Gregory A. Babbitt
    • 2
  1. 1.School of Life SciencesArizona State UniversityTempeUSA
  2. 2.The Center for Evolutionary Functional Genomics, The Biodesign InstituteArizona State UniversityTempeUSA