Annexin A2 Mediates the Localization of Measles Virus Matrix Protein at the Plasma Membrane

Journal of Virology
Ritsuko KogaShinji Ohno

Abstract

Annexins are a family of structurally related proteins that bind negatively charged membrane phospholipids in a Ca2+-dependent manner. Annexin A2 (AnxA2), a member of this family, has been implicated in a variety of cellular functions, including the organization of membrane domains, vesicular trafficking, and cell-cell adhesion. AnxA2 generally forms a heterotetrameric complex with a small Ca2+-binding protein, S100A10. Measles virus (MV), a member of the family Paramyxoviridae, is an enveloped virus with a nonsegmented negative-strand RNA genome. Knockdown of AnxA2 greatly reduced MV growth in cells without affecting its entry and viral RNA production. In MV-infected, AnxA2 knockdown cells, the expression level of the matrix (M) protein, but not other viral proteins, was reduced compared with that in control cells, and the distribution of the M protein at the plasma membrane was decreased. The M protein lines the inner surface of the envelope and plays an important role in virus assembly by connecting the nucleocapsid to the envelope proteins. The M protein bound to AnxA2 independently of AnxA2's phosphorylation or its association with S100A10 and was colocalized with AnxA2 within cells. Truncation of the N-terminal 10 amino a...Continue Reading

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Citations

Dec 21, 2018·Frontiers in Microbiology·Julia R TaylorW Martin Kast
Feb 13, 2019·Reviews in Medical Virology·Isah Abubakar AliyuHui-Yee Chee
Sep 15, 2020·Seminars in Cell & Developmental Biology·Kate DickerAlfredo Castello

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