Macrophage phosphoproteome analysis reveals MINCLE-dependent and -independent mycobacterial cord factor signaling

Madlen Hansen, Julien Peltier, Barbara Killy, Bushra Amin, Barbara Bodendorfer, Anetta Härtlova, Sebastian Uebel, Markus Bosmann, Jörg Hofmann, Christian Büttner, Arif B Ekici, Mario Kuttke, Henrik Franzyk, Camilla Foged, Sandra Beer-Hammer, Gernot Schabbauer, Matthias Trost, Roland Lang

    8 Citations (Scopus)

    Abstract

    Immune sensing of Mycobacterium tuberculosis relies on recognition by macrophages. Mycobacterial cord factor, trehalose-6,6-dimycolate (TDM), is the most abundant cell wall glycolipid and binds to the C-type lectin receptor (CLR) MINCLE. To explore the kinase signaling linking the TDM-MINCLE interaction to gene expression, we employed quantitative phosphoproteome analysis. TDM caused upregulation of 6.7% and suppressed 3.8% of the 14,000 phospho-sites identified on 3727 proteins. MINCLE-dependent phosphorylation was observed for canonical players of CLR signaling (e.g. PLC, PKC), and was enriched for PKC and GSK3 kinase motifs. MINCLE-dependent activation of the PI3K-AKT-GSK3 pathway contributed to inflammatory gene expression and required the PI3K regulatory subunit p85. Unexpectedly, a substantial fraction of TDM-induced phosphorylation was MINCLE-independent, a finding paralleled by transcriptome data. Bioinformatics analysis of both data sets concurred in the requirement for MINCLE for innate immune response pathways and processes. In contrast, MINCLE-independent phosphorylation and transcriptome responses were linked to cell cycle regulation. Collectively, our global analyses show substantial reprogramming of macrophages by TDM and reveal a dichotomy of MINCLE-dependent and-independent signaling linked to distinct biological responses.

    Original languageEnglish
    JournalMolecular and Cellular Proteomics
    Volume18
    Issue number4
    Pages (from-to)669-685
    ISSN1535-9476
    DOIs
    Publication statusPublished - Apr 2019

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