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Adducin‐1 Facilitates Influenza Virus Endosomal Trafficking and Uncoating by Regulating Branched Actin Dynamics and Myosin IIB Activity
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Adducin‐1 Facilitates Influenza Virus Endosomal Trafficking and Uncoating by Regulating Branched Actin Dynamics and Myosin IIB Activity
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Journal Article
Adducin‐1 Facilitates Influenza Virus Endosomal Trafficking and Uncoating by Regulating Branched Actin Dynamics and Myosin IIB Activity
2025
Overview
Actin‐ and microtubule‐based transport systems are essential for the trafficking of endocytic viruses and cargoes. Microtubules facilitate long‐distance transport; however, the precise role of actin dynamics and its regulators during virus entry, particularly in the transit process, remains elusive. Here, Adducin‐1 (ADD1) is identified as a key regulator of actin dynamics, as demonstrated by real‐time monitoring of quantum dot (QD)‐labeled influenza A virus (IAV) movement. ADD1 deletion increases actin density around endocytic vesicles, disrupting general vesicular trafficking and inhibiting the replication of diverse endocytic viruses. Mechanistically, endocytic viruses or cargoes trigger the phosphorylation of ADD1 at Ser726, which reduces the density of actin branches for effective transport. Additionally, the physical force required for IAV capsid dissociation is influenced by ADD1. Collectively, the study identifies a basic actin dynamics event with broad relevance to endocytic viruses or cargo trafficking and represents ADD1 as a potential target for developing broad‐spectrum antiviral strategies. In this study, a novel mechanism is unveiled by which ADD1, acting as a molecular switch, coordinates actin branch dynamics and the transport of endocytic viruses and cargoes. Phosphorylation of ADD1 at Ser726 reduces actin branch density, enhancing endosome fusion and attachment to microtubules. EG‐011 treatment and ADD1 knockdown reduced influenza virus replication in vivo and in vitro.
Publisher
John Wiley & Sons, Inc,John Wiley and Sons Inc,Wiley
Subject
