Endogenous ZAP affects Zika virus RNA interactome

Area of Science:

• Virology
• Molecular Biology
• Immunology

Background:

• Zika virus (ZIKV) poses a significant global health threat.
• Understanding viral RNA-host protein interactions is crucial for antiviral development.
• Zinc finger CCCH-type antiviral protein 1 (ZAP) is an innate immune factor involved in antiviral defense.

Purpose of the Study:

• To characterize the cellular protein interactome associated with flavivirus RNA using ChIRP-MS.
• To investigate the role of ZAP in mediating interactions between viral RNA and cellular proteins during ZIKV infection.
• To identify ZAP-dependent co-factors involved in antiviral responses against ZIKV.

Main Methods:

• Comprehensive Identification of RNA-binding Proteins by Mass Spectrometry (ChIRP-MS) was employed.
• Experiments were conducted in mock-infected and ZIKV-infected wild-type cells, as well as ZAP-knockout cells.
• Analysis focused on differentiating ZAP-independent and ZAP-dependent cellular protein interactomes associated with viral RNA.

Main Results:

• ChIRP-MS successfully identified cellular proteins interacting with ZIKV RNA.
• ZAP was found to influence the association of specific cellular proteins with ZIKV RNA.
• A ZAP-dependent interactome was characterized, highlighting proteins potentially acting as ZAP co-factors.

Conclusions:

• ZAP plays a role in modulating the cellular protein landscape associated with ZIKV RNA.
• The identified ZAP-dependent interactome offers insights into ZAP's antiviral mechanisms against ZIKV.
• Further research into ZAP co-factors and their mechanisms is essential for developing novel antiviral strategies.