An integrated workflow for phosphopeptide identification in natural killer cells (NK-92MI) and their targets (MDA-MB-231) during immunological synapse formation

Autor: Daniel Perez-Hernandez, Liza Filali, Clement Thomas, Gunnar Dittmar
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: STAR Protocols, Vol 4, Iss 1, Pp 102104- (2023)
Druh dokumentu: article
ISSN: 2666-1667
DOI: 10.1016/j.xpro.2023.102104
Popis: Summary: Here, we present a protocol to identify and quantify phosphopeptides during the dynamic formation of an immunological synapse. We describe steps for mixing isotope-labeled immune and target cells, the stabilization of cell-to-cell conjugates by cross-linking, and their isolation by fluorescence-activated cell sorting. We detail the isolation of phosphopeptides by phosphopeptide enrichment and their subsequent measurement by mass spectrometry. Finally, we describe the analysis of the resulting data to separate cell-specific phosphopeptides using the isotope label and label-free quantification. : Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics.
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