TAR DNA-Binding Protein 43 is Cleaved by the Protease 3C of Enterovirus A71

Overview

Journal Virol Sin

Specialty Microbiology

Date 2020 Jul 23

PMID 32696397

Citations 5

Authors

Xiaoman Wo

Yuan Yuan

Yong Xu

Yang Chen

Yao Wang

Shuoxuan Zhao

Lexun Lin

Xiaoyan Zhong

Yan Wang

Zhaohua Zhong

Wenran Zhao

Affiliations

Soon will be listed here.

Abstract

Enterovirus A71 (EV-A71) is one of the etiological pathogens leading to hand, foot, and mouth disease (HFMD), which can cause severe neurological complications. The neuropathogenesis of EV-A71 infection is not well understood. The mislocalization and aggregation of TAR DNA-binding protein 43 (TDP-43) is the pathological hallmark of amyotrophic lateral sclerosis (ALS). However, whether TDP-43 was impacted by EV-A71 infection is unknown. This study demonstrated that TDP-43 was cleaved during EV-A71 infection. The cleavage of TDP-43 requires EV-A71 replication rather than the activated caspases due to viral infection. TDP-43 is cleaved by viral protease 3C between the residues 331Q and 332S, while mutated TDP-43 (Q331A) was not cleaved. In addition, mutated 3C which lacks the protease activity failed to induce TDP-43 cleavage. We also found that TDP-43 was translocated from the nucleus to the cytoplasm, and the mislocalization of TDP-43 was induced by viral protease 2A rather than 3C. Taken together, we demonstrated that TDP-43 was cleaved by viral protease and translocated to the cytoplasm during EV-A71 infection, implicating the possible involvement of TDP-43 in the pathogenesis of EV-A71infection.

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