Purification of Recombinant Budgerigar Fledgling Disease Virus VP1 Capsid Protein and Its Ability for in Vitro Capsid Assembly

Overview

Journal J Virol

Publisher American Society for Microbiology

Date 1994 May 1

PMID 8151798

Citations 6

Authors

R E Rodgers

D Chang

X Cai

R A Consigli

Affiliations

Soon will be listed here.

Abstract

A recombinant system for the major capsid VP1 protein of budgerigar fledgling disease virus has been established. The VP1 gene was inserted into a truncated form of the pFlag-1 vector and expressed in Escherichia coli. The budgerigar fledgling disease virus VP1 protein was purified to near homogeneity by immunoaffinity chromatography. Fractions containing highly purified VP1 were pooled and found to constitute 3.3% of the original E. coli-expressed VP1 protein. Electron microscopy revealed that the VP1 protein was isolated as pentameric capsomeres. Electron microscopy also revealed that capsid-like particles were formed in vitro from purified VP1 capsomeres with the addition of Ca2+ ions and the removal of chelating and reducing agents.

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