Abstract
Transient expression in plants has become a useful production system for virus-like particle (VLP) expression. High yields and flexible approaches to assembling complex VLPs, combine with ease of scale-up and inexpensive reagents to provide an attractive method for recombinant protein expression in general. Plants have demonstrated excellent capacity for the assembly and production of protein cages for use in vaccine design and nanotechnology. Furthermore, numerous virus structures have now been determined using plant-expressed VLPs, showing the utility of this approach in structural virology. Transient protein expression in plants uses common microbiology techniques, leading to a straightforward transformation procedure that does not result in stable transgenesis. In this chapter, we aim to provide a generic protocol for transient expression of VLPs in Nicotiana benthamiana using soil-free plant cultivation and a simple vacuum infiltration procedure, along with methodology for purifying VLPs from plant leaves.
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