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Proteomic Organellar Mapping Identifies Modulation of Peroxisomes by HIV-1

ABSTRACT: The interaction between HIV-1 and the host cell has been studied at many levels, but cell-wide organellar changes caused by the virus have not been defined. Here, we aimed to detail perturbations to the host cell spatial proteome following HIV protein expression. Subcellular fractionation followed by mass spectrometric analysis of Jurkat T cells, in which HIV-expression was uniformly induced, identified thousands of cytoplasmic and membrane-bound proteins and enable their placement within a multi-dimensional analytic space based on the 7 fractions. Spatial proteomic data were analyzed via a support vector machine bagging classifier to assess the movement of proteins between compartments. The proteins were also examined for absolute movement within 7-dimensional Euclidean space. We found that while some proteins moved between organelles, others remained classified within the same organelle but moved as a group relative to other organelles. The expression of HIV-1 affected the distribution of peroxisomal proteins, causing them to move closer to proteins of the endoplasmic reticulum and lysosomes, but only when the viral protein Nef was expressed. These data identify Nef-dependent changes in peroxisomes as a novel perturbation of the host cell by HIV-1.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): T Cell, Jurkat Cell

SUBMITTER: Alicia Richards

LAB HEAD: Nevan J. Krogan

PROVIDER: PXD024716 | Pride | 2022-01-28

REPOSITORIES: Pride

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