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- W2158979538 endingPage "5042" @default.
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- W2158979538 abstract "Abstract The receptor-like protein tyrosine phosphatase CD45 is essential for TCR signal transduction. Substrates of CD45 include the protein tyrosine kinases p56lck and p59fyn, both of which have been shown to be enriched in detergent-insoluble microdomains. Here we find that there is a cholesterol-dependent association between CD45 and the raft-associated protein linker for activation of T cells, suggesting that CD45 and linker for activation of T cells may colocalize in lipid rafts. Consistent with this observation, we find that ∼5% of total CD45 can be detected in Triton X-100-insoluble buoyant fractions of sucrose gradients, demonstrating that CD45 is not excluded from lipid rafts. Upon stimulation of T cells with anti-CD3, there is a reduction in the amount of CD45 found associating with lipid rafts. Our data suggest that CD45 is present in lipid rafts in T cells before activation, perhaps to activate raft-associated p56lck, allowing membrane-proximal signaling events to proceed. Furthermore, the reduction in CD45 content of lipid rafts after CD3 stimulation may serve to limit the amounts of activated p56lck in rafts and thus possibly the duration of T cell responses." @default.
- W2158979538 created "2016-06-24" @default.
- W2158979538 creator A5019742146 @default.
- W2158979538 creator A5021458305 @default.
- W2158979538 date "2002-11-01" @default.
- W2158979538 modified "2023-09-29" @default.
- W2158979538 title "Dynamic Association of CD45 with Detergent-Insoluble Microdomains in T Lymphocytes" @default.
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- W2158979538 doi "https://doi.org/10.4049/jimmunol.169.9.5036" @default.
- W2158979538 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12391219" @default.
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