The exon-intron structure and chromosomal localization of the mouse macrophage mannose receptor gene Mrc1: identification of a Ricin-like domain at the N-terminus of the receptor.
1994
Abstract The macrophage mannose receptor is a transmembrane protein that is expressed on the surface of mature macrophages. The ectodomain of the receptor contains multiple domains, eight of which belong to the calcium-dependent C-type lectin family. The mannose receptor binds to carbohydrate polymers that have a high content of mannose. This property allows this protein to function as a phagocytic receptor that participates in first-line host defense against invading microorganisms. In this paper we describe the intron-exon structure of the mouse macrophage mannose receptor gene which was found to span at least 70 kilobases. We also report the localization of this gene, termed MrcI , to mouse Chromosome 2. Like its human counterpart, Mrcl contains 30 exons and 29 introns. A protein module that resembles a subdomain of the B chain of the plant lectin Ricin has been found within the N-terminal cysteine-rich domain of the mannose receptor.
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