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Genes & Genomics

, Volume 37, Issue 4, pp 365–374 | Cite as

Lengths of coding and noncoding regions of a gene correlate with gene essentiality and rates of evolution

  • Seung-Ho Shin
  • Sun Shim Choi
Research Article

Abstract

Gene length correlates with the coding evolutionary rates of genes. Although the ‘Hill-Robertson (HR) interference’ model was suggested as an explanation for the correlation, we present an alternative explanation for the relationship between gene length and evolutionary rate. First, genes with longer coding sequences were significantly more essential and evolved more slowly than genes with shorter CDSs, and they contained more functional domains within the gene. Surprisingly, the same trends held for the lengths of other subcomponents; genes that carried longer 5′ and 3′ untranslated regions and introns were more essential. Additionally, the noncoding subcomponents that had higher densities of conserved sites were longer. Furthermore, the density of conserved sites in a coding region of a gene was associated with the density of conserved sites in the noncoding regions of that gene. Finally, in all five vertebrate species that were tested, more functionally constrained genes tended to carry longer subcomponents.

Keywords

Gene length Evolutionary rate Gene essentiality Functional constraint 

Notes

Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (NRF-2014R1A1A4A01003793). Authors would like to thank Sridhar Hannenhalli for his useful comments.

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

13258_2015_265_MOESM1_ESM.doc (178 kb)
Supplementary material 1 (DOC 178 kb)

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Copyright information

© The Genetics Society of Korea and Springer-Science and Media 2015

Authors and Affiliations

  1. 1.Department of Medical Biotechnology, College of Biomedical Science, and Institute of Bioscience & BiotechnologyKangwon National UniversityChuncheonSouth Korea

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