DNA recognition properties of the cell-to-cell movement protein (MP) of soybean isolate of Mungbean yellow mosaic India virus (MYMIV-Sb)

Virus Res. 2008 Feb;131(2):152-9. doi: 10.1016/j.virusres.2007.09.002. Epub 2007 Oct 18.

Abstract

Bipartite geminiviruses possess two movement proteins (NSP and MP), which mediate the intra- and intercellular movement. In order to accomplish the transport process the movement proteins interact with viral nucleic acids in a sequence non-specific manner. To investigate the nucleic acid recognition properties of MP of MYMIV-Sb, the protein was expressed in Escherichia coli as a fusion protein with maltose-binding protein (MBP) and purified in native condition. Gel mobility shift assay was employed for analyzing the DNA recognition properties of purified MBP-MP fusion protein. The analyses demonstrated the sequence non-specific binding of MYMIV-Sb MP to both ds and ssDNA and its high affinity for ssDNA. MP of MYMIV-Sb did not show any specificity towards various forms of plasmid DNA but displayed size selection towards linear dsDNA.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Begomovirus / physiology*
  • DNA, Single-Stranded / metabolism
  • DNA, Viral / metabolism*
  • Electrophoretic Mobility Shift Assay
  • Escherichia coli / genetics
  • Gene Expression
  • Glycine max / virology*
  • Plant Viral Movement Proteins / metabolism*
  • Protein Binding
  • Recombinant Fusion Proteins / biosynthesis
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / isolation & purification
  • Recombinant Fusion Proteins / metabolism

Substances

  • DNA, Single-Stranded
  • DNA, Viral
  • Plant Viral Movement Proteins
  • Recombinant Fusion Proteins