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Chinese Science Bulletin

, Volume 45, Issue 15, pp 1417–1421 | Cite as

Discovery and demonstration of small circular DNA molecules derived from Chinese tomato yellow leaf curl virus

  • Qinyan Yin
  • Ying Zhang
  • Yuman Zhang
  • Yule Liu
  • Zhongze Zhang
  • Po Tian
Notes

Abstract

Tomato yetlow leaf curl viruses betong to Begomoviruses of geminiviruses. In this work, we first found and demonstrated that the small circular DNA molecules were derived from Chinese tomato yetlow leaf curl viruses (TYLCV-CHI). These small circular DNA molecules are about 1,3 kb, which are half the full-length of TYLCV-CHI DNA A. It was shown by sequence determination and analysis that there was unknown-origin sequence insertion in the middle of the small molecules. These sequences of unknown-origin were neither homologous to DNA A nor to DNA B, and were formed by recombination of virus DNA and plant DNA. Although various defective molecules contained different unknown-origin sequence insertion, all the molecules contained the intergenic region and part of the AC1 (Rep) gene. But they did not contain full ORF.

Keywords

geminiviruses tomato yetlow leaf curl viruses genome subgene 

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Copyright information

© Science in China Press 2000

Authors and Affiliations

  • Qinyan Yin
    • 1
    • 2
  • Ying Zhang
    • 1
  • Yuman Zhang
    • 1
  • Yule Liu
    • 1
  • Zhongze Zhang
    • 2
  • Po Tian
    • 1
  1. 1.Department of Molecular Virology and Bioengineering, Institute of MicrobiologyChinese Academy of SciencesBeijingChina
  2. 2.Department of Microbiology, Institute of Applied EcologyChinese Academy of SciencesShenyangChina

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