Lee JH, Wittki S, Braeu T, Dreyer F, Kraetzel K, Dindorf J, Johnston ICD, Gross S, Kremmer E, Zeidler R, Schlötzer-Schrehardt U, Lichtenheld M, Saksela K, Harrer T, Schuler G, Federico M, Baur A (2013)
Publication Type: Journal article
Publication year: 2013
Book Volume: 49
Pages Range: 668-79
Journal Issue: 4
DOI: 10.1016/j.molcel.2012.12.004
The HIV Nef protein recruits the polycomb protein Eed and mimics an integrin receptor signal for reasons that are not entirely clear. Here we demonstrate that Nef and Eed complex with the integrin effector paxillin to recruit and activate TNF? converting enzyme (TACE alias ADAM 17) and its close relative ADAM10. The activated proteases cleaved proTNF? and were shuttled into extracellular vesicles (EVs). Peripheral blood mononuclear cells that ingested these EVs released TNF?. Analyzing the mechanism, we found that Pak2, an established host cell effector of Nef, phosphorylated paxillin on Ser272/274 to induce TACE-paxillin association and shuttling into EVs via lipid rafts. Conversely, Pak1 phosphorylated paxillin on Ser258, which inhibited TACE association and lipid raft transfer. Interestingly, melanoma cells used an identical mechanism to shuttle predominantly ADAM10 into EVs. We conclude that HIV-1 and cancer cells exploit a paxillin/integrin-controlled mechanism to release TACE/ADAM10-containing vesicles, ensuring better proliferation/growth conditions in their microenvironment.
APA:
Lee, J.-H., Wittki, S., Braeu, T., Dreyer, F., Kraetzel, K., Dindorf, J.,... Baur, A. (2013). HIV Nef, paxillin, and Pak1/2 regulate activation and secretion of TACE/ADAM10 proteases. Molecular Cell, 49(4), 668-79. https://doi.org/10.1016/j.molcel.2012.12.004
MLA:
Lee, Jung-Hyun, et al. "HIV Nef, paxillin, and Pak1/2 regulate activation and secretion of TACE/ADAM10 proteases." Molecular Cell 49.4 (2013): 668-79.
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