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Geminivirus DNA replication.

C Gutierrez1

  • 1Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Cientificas, Universidad Autónoma de Madrid, Cantoblanco, Spain. cgutierrez@cbm.uam.es

Cellular and Molecular Life Sciences : CMLS
|February 24, 2001
PubMed
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Geminiviruses, plant DNA viruses, utilize host cell machinery for replication. Their rolling-circle mechanism and cell cycle coupling make them key models for studying plant DNA replication and cell cycle regulation.

Area of Science:

  • Plant virology
  • Molecular biology
  • Genetics

Background:

  • Geminiviruses are small DNA viruses infecting plants, relying heavily on host cellular proteins for their replication.
  • Their replication involves converting single-stranded DNA (ssDNA) to double-stranded DNA (dsDNA) intermediates, followed by rolling-circle amplification and ssDNA genome production.

Purpose of the Study:

  • To review the DNA replication cycle of geminiviruses.
  • To highlight their role as model systems for understanding plant DNA replication and cell cycle regulation.
  • To discuss recent advances in identifying factors involved in geminivirus origin function.

Main Methods:

  • Review of existing literature on geminivirus DNA replication.
  • Analysis of viral strategies for genome amplification.

Related Experiment Videos

  • Examination of the interplay between viral DNA replication and plant cell cycle.

    • Main Results:

    • Geminivirus replication is a complex process involving ssDNA to dsDNA conversion and rolling-circle amplification.
    • Viral DNA replication is intrinsically linked to the host plant cell cycle.
    • Significant progress has been made in identifying cis-acting signals and trans-acting factors governing geminivirus origin function.

    Conclusions:

    • Geminiviruses serve as valuable models for dissecting plant DNA replication and cell cycle control.
    • Understanding geminivirus replication provides insights into fundamental plant cellular processes.
    • Further research continues to elucidate the molecular mechanisms underlying geminivirus DNA replication.