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Structural Basis of Mannan-Binding Lectin Recognition by Its Associated Serine Protease MASP-1: Implications for Complement Activation
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Gingras, Alexandre R., Girija, Umakhanth Venkatraman, Keeble, Anthony H., Panchal, Roshni, Mitchell, Daniel A., Moody, Peter C.E. and Wallis, Russell. (2011) Structural Basis of Mannan-Binding Lectin Recognition by Its Associated Serine Protease MASP-1: Implications for Complement Activation. Structure, Vol.19 (No.11). pp. 1635-1643. ISSN 0969-2126
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Official URL: http://dx.doi.org/10.1016/j.str.2011.08.014
Abstract
Complement activation contributes directly to health and disease. It neutralizes pathogens and stimulates immune processes. Defects lead to immunodeficiency and autoimmune diseases, whereas inappropriate activation causes self-damage. In the lectin and classical pathways, complement is triggered upon recognition of a pathogen by an activating complex. Here we present the first structure of such a complex in the form of the collagen-like domain of mannan-binding lectin (MBL) and the binding domain of its associated protease (MASP-1/-3). The collagen binds within a groove using a pivotal lysine side chain that interacts with Ca(2+)-coordinating residues, revealing the essential role of Ca(2+). This mode of binding is prototypic for all activating complexes of the lectin and classical pathways, and suggests a general mechanism for the global changes that drive activation. The structural insights reveal a new focus for inhibitors and we have validated this concept by targeting the binding pocket of the MASP.
| Item Type: | Journal Article |
|---|---|
| Subjects: | R Medicine > R Medicine (General) |
| Divisions: | Faculty of Medicine > Warwick Medical School |
| Journal or Publication Title: | Structure |
| Publisher: | Cell Press |
| ISSN: | 0969-2126 |
| Date: | 2011 |
| Volume: | Vol.19 |
| Number: | No.11 |
| Number of Pages: | 9 |
| Page Range: | pp. 1635-1643 |
| Identification Number: | 10.1016/j.str.2011.08.014 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/40419 |
Data sourced from Thomson Reuters' Web of Knowledge
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