Abstract
AbstractSignal-regulatory proteins (SIRPs) are cell-surface glycoproteins expressed on myeloid and neural cells that have been shown to recruit SH2 domain-containing protein phosphatase 1 (SHP-1) and SHP-2 and to regulate receptor tyrosine kinase-coupled signaling. One SIRP of unknown function, designated SIRPβ1, contains a short cytoplasmic domain that lacks sequence motifs capable of recruiting SHP-1 and SHP-2. Using a SIRP-specific mAb, we show that SIRPβ1 is expressed in monocytes and dendritic cells and associates with the signal transduction molecule DAP12. SIRPβ1/DAP12 complex formation was required for efficient cell-surface expression of SIRPβ1. Stimulation of this complex induced tyrosine phosphorylation, mitogen-activated protein kinase activation, and cellular activation. Thus, SIRPβ1 is a new DAP12-associated receptor involved in the activation of myeloid cells.
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Dates
Type | When |
---|---|
Created | 11 years, 4 months ago (April 21, 2014, 6:07 p.m.) |
Deposited | 8 months ago (Jan. 2, 2025, 12:18 p.m.) |
Indexed | 1 month, 4 weeks ago (July 6, 2025, 1:45 p.m.) |
Issued | 25 years, 8 months ago (Jan. 1, 2000) |
Published | 25 years, 8 months ago (Jan. 1, 2000) |
Published Print | 25 years, 8 months ago (Jan. 1, 2000) |
@article{Dietrich_2000, title={Cutting Edge: Signal-Regulatory Protein β1 Is a DAP12-Associated Activating Receptor Expressed in Myeloid Cells}, volume={164}, ISSN={1550-6606}, url={http://dx.doi.org/10.4049/jimmunol.164.1.9}, DOI={10.4049/jimmunol.164.1.9}, number={1}, journal={The Journal of Immunology}, publisher={Oxford University Press (OUP)}, author={Dietrich, Jes and Cella, Marina and Seiffert, Martina and Bühring, Hans-Jörg and Colonna, Marco}, year={2000}, month=jan, pages={9–12} }