Download MendeleyFEZ1 Is Recruited to a Conserved Cofactor Site on Capsid to Promote HIV-1 Trafficking.
Huang, P.T., Summers, B.J., Xu, C., Perilla, J.R., Malikov, V., Naghavi, M.H., Xiong, Y.(2019) Cell Rep 28: 2373
- PubMed: 31422020
- DOI: https://doi.org/10.1016/j.celrep.2019.07.079
- Primary Citation of Related Structures:
6OMT - PubMed Abstract:
HIV-1 uses the microtubule network to traffic the viral capsid core toward the nucleus. Viral nuclear trafficking and infectivity require the kinesin-1 adaptor protein FEZ1. Here, we demonstrate that FEZ1 directly interacts with the HIV-1 capsid and specifically binds capsid protein (CA) hexamers. FEZ1 contains multiple acidic, poly-glutamate stretches that interact with the positively charged central pore of CA hexamers. The FEZ1-capsid interaction directly competes with nucleotides and inositol hexaphosphate (IP6) that bind at the same location. In addition, all-atom molecular dynamic (MD) simulations establish the molecular details of FEZ1-capsid interactions. Functionally, mutation of the FEZ1 capsid-interacting residues significantly reduces trafficking of HIV-1 particles toward the nucleus and early infection. These findings support a model in which the central capsid hexamer pore is a general HIV-1 cofactor-binding hub and FEZ1 serves as a unique CA hexamer pattern sensor to recognize this site and promote capsid trafficking in the cell.
Organizational Affiliation:
Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA.
