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Murine serine proteases MASP-1 and MASP-3, components of the lechtin pathway activation complex of complement, are encoded by a single structural gene.
Genes Immun. 4, 374-384 (2003)
Activation of the lectin pathway of complement is initiated by the binding to microbial carbohydrate structures of a multimolecular fluid-phase complex composed of a carbohydrate recognition subcomponent that associates with three specific serine proteases and an enzymatically inert protein of 19 kDa. The first carbohydrate recognition subcomponent of the lectin pathway identified was mannan-binding lectin (MBL), hence the serine proteases were named MBL-associated serine proteases (MASPs) and numbered according to the sequence of their discovery. Here we describe the primary structures of the two distinct serine proteases MASP-1 and MASP-3 in the rat (and of MASP-3 in the mouse), show their association with plasma MBL complexes, and demonstrate that in rat and mouse, as in man, MASP-1 and MASP-3 are encoded by a single structural gene. For both species, we present the genomic region and regulatory elements responsible for the processing of either MASP-1 or MASP-3 mRNA by alternative splicing/alternative polyadenylation. Furthermore, we demonstrate the evolutionary conservation of MASP-3 mRNA in cDNA transcripts from guinea pig, rabbit, pufferfish, and cow.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
innate immunity; complement serine proteases; lectin pathway; alternative splicing/polyadenylation
ISSN (print) / ISBN
1466-4879
e-ISSN
1476-5470
Journal
Genes and Immunity
Quellenangaben
Volume: 4,
Issue: 5,
Pages: 374-384
Publisher
Nature Publishing Group
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Lung Biology (LHI)