BmATAD3A negatively regulates BmIGF2BP1 to promote BmNPV proliferation

Area of Science:

• Molecular Biology
• Virology
• Insect Science

Background:

• Baculoviruses are vital for biological control and biotechnology, relying on host factors for replication.
• AAA ATPase family members are critical regulators in baculovirus-host interactions.
• Bombyx mori ATAD3A (BmATAD3A) is known to be involved in Bombyx mori nucleopolyhedrovirus (BmNPV) replication.

Purpose of the Study:

• To elucidate the mechanism by which BmATAD3A influences BmNPV replication.
• To identify BmATAD3A interacting proteins and their roles in viral propagation.
• To understand the interplay between BmATAD3A and BmIGF2BP1 in the context of BmNPV infection.

Main Methods:

• Generation of transgenic silkworms overexpressing BmATAD3A.
• Co-immunoprecipitation (Co-IP) followed by mass spectrometry to identify interacting proteins.
• Analysis of gene expression and viral replication levels.

Main Results:

• BmATAD3A overexpression significantly enhances BmNPV proliferation in vivo.
• BmIGF2BP1 was identified as a novel interacting protein of BmATAD3A.
• BmATAD3A negatively regulates BmIGF2BP1 expression, and BmIGF2BP1 suppresses BmNPV replication.

Conclusions:

• BmATAD3A plays a crucial role in promoting BmNPV replication through the downregulation of the viral suppressor BmIGF2BP1.
• This study reveals a novel regulatory pathway involving BmATAD3A and BmIGF2BP1, advancing the understanding of baculovirus-host interactions.
• Findings contribute to the knowledge of AAA ATPase functions in viral propagation and enrich the baculovirus-host interaction network.