ArticleImmunology and cell biology2017
Development of SH2 probes and pull-down assays to detect pathogen-induced, site-specific tyrosine phosphorylation of the TLR adaptor SCIMP.
Article in Immunology and cell biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed, 7 citations in OpenAlex.
- Imperative role of adaptor proteins in macrophage toll-like receptor signaling pathways.Future science OA · 2024Review
- The transmembrane adapter SCIMP recruits tyrosine kinase Syk to phosphorylate Toll-like receptors to mediate selective inflammatory outputs.The Journal of biological chemistry · 2022Article
- An alternative downstream translation start site in the non-TIR adaptor Scimp enables selective amplification of CpG DNA responses in mouse macrophages.Immunology and cell biology · 2022Article
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Protein tyrosine phosphorylation guides many molecular interactions for cellular functions. SCIMP is a transmembrane adaptor protein (TRAP) family member that mediates selective proinflammatory cytokine responses generated by pathogen-activated Toll-like receptor (TLR) pathways in macrophages. TLR activation triggers SCIMP phosphorylation and selective phosphorylation of distinct tyrosine residues on this adaptor offers the potential for regulating or biasing inflammatory responses. To analyze site-specific phosphorylation events, we developed three probes based on the SH2 domains of known SCIMP effectors, and used them for pull-downs from macrophage extracts. CRISPR-mediated SCIMP-deficient RAW264.7 macrophage-like cells were reconstituted with various phosphorylation-deficient (Y58F, Y96F, Y120F) SCIMPs, and used to demonstrate the specificity of LPS/TLR4-induced, site-specific phosphorylation of SCIMP for the temporal recruitment of the effectors Grb2, Csk and SLP65. Our findings reveal potential for differential SCIMP phosphorylation and specific effectors to influence TLR signaling and inflammatory programs. Furthermore, the use of Csk-SH2 pull-downs to identify additional known and new Csk targets in LPS-activated macrophages reveals the wider utility of our SH2 probes.
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Registered trials
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