Journal of Molecular Evolution

, Volume 68, Issue 6, pp 629–640 | Cite as

Phylogenetic Analysis of Zebrafish Basic Helix-Loop-Helix Transcription Factors

  • Yong Wang
  • Keping Chen
  • Qin Yao
  • Xiaodong Zheng
  • Zhe Yang
Article

Abstract

The basic helix-loop-helix (bHLH) proteins play important regulatory roles in eukaryotic developmental processes including neurogenesis, myogenesis, hematopoiesis, sex determination, and gut development. Zebrafish is a good model organism for developmental biology. In this study, we identified 139 bHLH genes encoded in the zebrafish genome. Phylogenetic analyses revealed that zebrafish has 58, 29, 21, 5, 19, and 5 bHLH members in groups A, B, C, D, E, and F, respectively, while 2 members were classified as “orphan.” A comparison between zebrafish and human bHLH repertoires suggested that both organisms have a certain number of specific bHLH members. Eight zebrafish bHLH genes were found to have multiple coding regions in the genome. Two of these, Bmal1 and MITF, are good anchor genes for identification of fish-specific whole-genome duplication events in comparison with mouse and chicken genomes. The present study provides useful information for future studies on gene family evolution and vertebrate development.

Keywords

Basic helix-loop-helix Phylogenesis Transcription factor Zebrafish 

Notes

Acknowledgments

We are grateful to Professor Bin Chen and two anonymous reviewers for constructive comments on the manuscript. This work was supported by grants from the Jiangsu Sci-Tech Support Project—Agriculture (No. BE2008379) and the China National “863” Project (No. 2008AA10Z145).

Supplementary material

239_2009_9232_MOESM1_ESM.docx (78 kb)
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239_2009_9232_MOESM2_ESM.docx (60 kb)
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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Yong Wang
    • 1
  • Keping Chen
    • 2
  • Qin Yao
    • 2
  • Xiaodong Zheng
    • 2
  • Zhe Yang
    • 2
  1. 1.Department of Biotechnology, School of Food and Biological EngineeringJiangsu UniversityZhenjiangPeople’s Republic of China
  2. 2.Institute of Life SciencesJiangsu UniversityZhenjiangPeople’s Republic of China

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