4iw4

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Template:STRUCTURE 4iw4

Contents

Crystal structure of the serine protease domain of MASP-3 in complex with ecotin

Template:ABSTRACT PUBMED 23861840

Disease

[MASP1_HUMAN] Defects in MASP1 are the cause of 3MC syndrome type 1 (3MC1) [MIM:257920]. 3MC1 is a disorder characterized by facial dysmorphism that includes hypertelorism, blepharophimosis, blepharoptosis and highly arched eyebrows, cleft lip and/or palate, craniosynostosis, learning disability and genital, limb and vesicorenal anomalies. The term 3MC syndrome includes Carnevale, Mingarelli, Malpuech, and Michels syndromes.[1]

Function

[ECOT_ECOLI] General inhibitor of pancreatic serine proteases: inhibits chymotrypsin, trypsin, elastases, factor X, kallikrein as well as a variety of other proteases. The strength of inhibition does not appear to be correlated with a particular protease specificity.[HAMAP-Rule:MF_00706] [MASP1_HUMAN] Functions in the lectin pathway of complement, which performs a key role in innate immunity by recognizing pathogens through patterns of sugar moieties and neutralizing them. The lectin pathway is triggered upon binding of mannan-binding lectin (MBL) and ficolins to sugar moieties which leads to activation of the associated proteases MASP1 and MASP2. Functions as an endopeptidase and may activate MASP2 or C2 or directly activate C3 the key component of complement reaction. Isoform 2 may have an inhibitory effect on the activation of the lectin pathway of complement or may cleave IGFBP5.[2] [3]

About this Structure

4iw4 is a 4 chain structure with sequence from Escherichia coli and Homo sapiens. Full crystallographic information is available from OCA.

See Also

Reference

  • Gaboriaud C, Gupta RK, Martin L, Lacroix M, Serre L, Teillet F, Arlaud GJ, Rossi V, Thielens NM. The serine protease domain of MASP-3: enzymatic properties and crystal structure in complex with ecotin. PLoS One. 2013 Jul 4;8(7):e67962. doi: 10.1371/journal.pone.0067962. Print 2013. PMID:23861840 doi:10.1371/journal.pone.0067962
  1. ↑ Rooryck C, Diaz-Font A, Osborn DP, Chabchoub E, Hernandez-Hernandez V, Shamseldin H, Kenny J, Waters A, Jenkins D, Kaissi AA, Leal GF, Dallapiccola B, Carnevale F, Bitner-Glindzicz M, Lees M, Hennekam R, Stanier P, Burns AJ, Peeters H, Alkuraya FS, Beales PL. Mutations in lectin complement pathway genes COLEC11 and MASP1 cause 3MC syndrome. Nat Genet. 2011 Mar;43(3):197-203. doi: 10.1038/ng.757. Epub 2011 Jan 23. PMID:21258343 doi:10.1038/ng.757
  2. ↑ Dahl MR, Thiel S, Matsushita M, Fujita T, Willis AC, Christensen T, Vorup-Jensen T, Jensenius JC. MASP-3 and its association with distinct complexes of the mannan-binding lectin complement activation pathway. Immunity. 2001 Jul;15(1):127-35. PMID:11485744
  3. ↑ Moller-Kristensen M, Thiel S, Sjoholm A, Matsushita M, Jensenius JC. Cooperation between MASP-1 and MASP-2 in the generation of C3 convertase through the MBL pathway. Int Immunol. 2007 Feb;19(2):141-9. Epub 2006 Dec 20. PMID:17182967 doi:dxl131

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