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Cowpea mosaic virus: effects on host cell processes.

Jeroen Pouwels1, Jan E Carette, Jan Van Lent

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Summary
This summary is machine-generated.

Cowpea mosaic virus (CPMV) closely resembles animal picornaviruses. This study details CPMV

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Area of Science:

  • Plant Virology
  • Molecular Biology
  • Structural Biology

Background:

  • Cowpea mosaic virus (CPMV) is a significant plant pathogen affecting cowpea (Vigna unguiculata).
  • CPMV shares characteristics with animal picornaviruses, including gene organization and replication protein sequences.
  • Limited comparative studies exist for CPMV isolates globally.

Purpose of the Study:

  • To provide a comprehensive overview of Cowpea mosaic virus (CPMV).
  • To detail the physical properties, host range, and transmission of CPMV.
  • To highlight the structural similarities between CPMV and animal picornaviruses.

Main Methods:

  • Analysis of purified CPMV preparations using ultracentrifugation.
  • Characterization of viral particle composition (RNA content, protein subunits).
  • Review of existing literature on CPMV host range and geographical distribution.

Main Results:

  • Purified CPMV yields three centrifugal components: empty shells (T) and two nucleoprotein components (M and B) with varying RNA content (24% and 34%).
  • CPMV particles are 28 nm icosahedral structures composed of 60 coat protein units and exhibit heat stability.
  • CPMV causes mosaic symptoms in cowpea, has a limited host range primarily within Leguminosae, and is transmitted by beetles.

Conclusions:

  • CPMV is structurally and genetically similar to animal picornaviruses.
  • The virus is geographically distributed in Africa, the Philippines, and Iran, notably absent from the Americas.
  • Further research into CPMV isolates worldwide is warranted.