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The C-type lectin receptor CLECSF8 (CLEC4D) is expressed by myeloid cells and triggers cellular activation through syk kinase
Authors
Gordon D. Brown
María Asunción Campanero-Rhodes
+13 more
Kevin M. Dennehy
Ten Feizi
Lisa M. Graham
Reto Guler
Vandana Gupta
William G. Hornsell
Stella K. Kim
Matti Kimberg
Angelina S. Palma
Delyth M. Reid
Georgia Schafer
Peter Sobieszczuk
Janet A. Willment
Publication date
21 June 2021
Publisher
'American Society for Biochemistry & Molecular Biology (ASBMB)'
Doi
Cite
Abstract
11 pags, 7 figsCLECSF8 is a poorly characterized member of the "Dectin-2 cluster" of C-type lectin receptors and was originally thought to be expressed exclusively by macrophages. We show here that CLECSF8 is primarily expressed by peripheral blood neutrophils and monocytes and weakly by several subsets of peripheral blood dendritic cells. However, expression of this receptor is lost upon in vitro differentiation of monocytes into dendritic cells or macrophages. Like the other members of the Dectin-2 family, which require association of their transmembrane domains with signaling adaptors for surface expression, CLECSF8 is retained intracellularly when expressed in non-myeloid cells. However, we demonstrate that CLECSF8 does not associate with any known signaling adaptor molecule, including DAP10, DAP12, or the FcRγ chain, and we found that the C-type lectin domain of CLECSF8 was responsible for its intracellular retention. Although CLECSF8 does not contain a signaling motif in its cytoplasmic domain, we show that this receptor is capable of inducing signaling via Syk kinase in myeloid cells and that it can induce phagocytosis, proinflammatory cytokine production, and the respiratory burst. These data therefore indicate that CLECSF8 functions as an activation receptor on myeloid cells and associates with a novel adaptor molecule. Characterization of the CLECSF8-deficient mice and screening for ligands using oligosaccharide microarrays did not provide further insights into the physiological function of this receptor. © 2012 by The American Society for Biochemistry and Molecular Biology, Inc.This work was funded by the Wellcome Trust, the National Research Foundation, the Deutscher Akademischer Austauschdienst, the University of Cape Town, the UK Research Council Basic Technology Initiative “Glycoar-rays” (GRS/79268), and the UK Medical Research Council. A. S. P is a fellowof the Fundação para a Ciência e Tecnologia (SFRH/BPD/26515/2006, Portugal) and M. A. C. of the Consejo Superior de Investigaciones Cientificas, Programe “Junta para la Ampliación de Estudios” (JaeDoc/098/2011) cofinanced by the Fondo Social Europeo
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Last time updated on 14/11/2021