Insights in luteovirid structural biology guided by chemical cross-linking and high resolution mass spectrometry

Virus Research
Mariko M AlexanderMichelle Cilia Heck

Abstract

Interactions among plant pathogenic viruses in the family Luteoviridae and their plant hosts and insect vectors are governed by the topology of the viral capsid, which is the sole vehicle for long distance movement of the viral genome. Previous application of a mass spectrometry-compatible cross-linker to preparations of the luteovirid Potato leafroll virus (PLRV; Luteoviridae: Polerovirus) revealed a detailed network of interactions between viral structural proteins and enabled generation of the first cross-linking guided coat protein models. In this study, we extended application of chemical cross-linking technology to the related Turnip yellows virus (TuYV; Luteoviridae: Polerovirus). Remarkably, all cross-links found between sites in the viral coat protein found for TuYV were also found in PLRV. Guided by these data, we present two models for the TuYV coat protein trimer, the basic structural unit of luteovirid virions. Additional cross-links found between the TuYV coat protein and a site in the viral protease domain suggest a possible role for the luteovirid protease in regulating the structural biology of these viruses.

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Citations

Dec 27, 2019·Mass Spectrometry Reviews·Aleksandra MilewskaPiotr Suder
Dec 9, 2020·Mass Spectrometry Reviews·Juan D ChavezJames E Bruce
May 1, 2021·Viruses·Yogy SimanjuntakPietro Scaturro

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