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Cell Rep. 2017 Sep 19;20(12):2792-2799. doi: 10.1016/j.celrep.2017.08.076.

Localized Phosphorylation of a Kinesin-1 Adaptor by a Capsid-Associated Kinase Regulates HIV-1 Motility and Uncoating.

Author information

1
Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.
2
Department of Microbiology-Immunology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA. Electronic address: mojgan.naghavi@northwestern.edu.

Abstract

Although microtubule motors mediate intracellular virus transport, the underlying interactions and control mechanisms remain poorly defined. This is particularly true for HIV-1 cores, which undergo complex, interconnected processes of cytosolic transport, reverse transcription, and uncoating of the capsid shell. Although kinesins have been implicated in regulating these events, curiously, there are no direct kinesin-core interactions. We recently showed that the capsid-associated kinesin-1 adaptor protein, fasciculation and elongation protein zeta-1 (FEZ1), regulates HIV-1 trafficking. Here, we show that FEZ1 and kinesin-1 heavy, but not light, chains regulate not only HIV-1 transport but also uncoating. This required FEZ1 phosphorylation, which controls its interaction with kinesin-1. HIV-1 did not stimulate widespread FEZ1 phosphorylation but, instead, bound microtubule (MT) affinity-regulating kinase 2 (MARK2) to stimulate FEZ1 phosphorylation on viral cores. Our findings reveal that HIV-1 binds a regulatory kinase to locally control kinesin-1 adaptor function on viral cores, thereby regulating both particle motility and uncoating.

KEYWORDS:

FEZ1; HIV-1; MARK2; capsid; kinesin-1; trafficking; uncoating

PMID:
28930676
PMCID:
PMC5679262
DOI:
10.1016/j.celrep.2017.08.076
[Indexed for MEDLINE]
Free PMC Article

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