Assembly of adeno-associated virus type 2 capsids in vitro

The Journal of General Virology
S SteinbachJ A Kleinschmidt

Abstract

Capsid proteins VP1, VP2 and VP3 of adeno-associated virus type 2 (AAV-2) were separately expressed by recombinant baculoviruses, purified under denaturing conditions and renatured in the presence of 0.5 M arginine, followed by dialysis against buffers of physiological ionic strength. At a protein concentration of 0.05 mg/ml, the three capsid proteins predominantly formed monomers and, to a lesser extent, oligomers, as determined by sedimentation analysis. Oligomerization increased at higher protein concentrations. The capsid protein oligomers consisted of globular, non-capsid-like structures, as detected by electron microscopy. Addition of a HeLa cell extract significantly stimulated oligomerization of the capsid proteins, probably due to interactions with HeLa cell proteins. Characterization of structures sedimenting around 60S by immunoprecipitation and electron microscopy showed that, in addition to other aggregates, empty capsid-like structures were formed in vitro. The identity of these structures as empty AAV capsids was verified by immunoelectron microscopy. Analysis of capsid formation in HeLa cells by transfection of VP expression constructs allowing separate expression of VP1, VP2 and VP3 showed that they were able t...Continue Reading

Citations

Oct 19, 2004·Journal of Virological Methods·Qing XieMichael S Chapman
May 6, 2016·The Journal of General Virology·L Earnest-SilveiraJoseph Torresi
Jan 6, 2009·Journal of Structural Biology·Hazel C LevyMavis Agbandje-McKenna
May 19, 2010·Proceedings of the National Academy of Sciences of the United States of America·Florian SonntagJürgen A Kleinschmidt
Sep 19, 2019·Human Gene Therapy·Suriyasri SubramanianSusan L Hafenstein
Apr 14, 2005·Journal of Virology·Stephanie KronenbergJürgen A Kleinschmidt
May 1, 2021·Life·Dinh To Le, Kristian M Müller
Nov 6, 2021·Scientific Reports·Lionel GalibertKari J Airenne

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