期刊
BIOCHEMICAL JOURNAL
卷 355, 期 -, 页码 489-497出版社
PORTLAND PRESS LTD
DOI: 10.1042/0264-6021:3550489
关键词
immunoglobulin superfamily; inhibitory receptor; innate immunity; lectin
Here we characterize Siglec-10 as a new member of the Siglec family of sialic acid-binding Ig-like lectins, A full-length cDNA was isolated from a human spleen library and the corresponding gene identified. Siglec-10 is predicted to contain five extracellular Ig-like domains and a cytoplasmic tail containing three putative tyrosine-based signalling motifs. Siglec-10 exhibited a high degree of sequence similarity to CD33-related Siglecs and mapped to the same region, on chromosome 19q13,3. The expressed protein was able to mediate sialic acid-dependent binding to human erythrocytes and soluble sialoglycoconjugates. Using specific antibodies, Siglec-10 was detected on subsets of human leucocytes including eosinophils, monocytes and a minor population of natural killer-like cells. The molecular properties and expression pattern suggest that Siglec-10 may function as an inhibitory receptor within the innate immune system.
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