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Open AccessArticle

The Clip-Segment of the von Willebrand Domain 1 of the BMP Modulator Protein Crossveinless 2 Is Preformed

1
Julius-von-Sachs Institut für Biowissenschaften der Universität Würzburg, Julius-von-Sachs Platz 2, Würzburg D-97082, Germany
2
Lehrstuhl für Physiologische Chemie II, Biozentrum der Universität Würzburg, Am Hubland, Würzburg D-97074, Germany
3
Leibnizinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, Robert-Roessle Str. 10, Berlin D-13125, Germany
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Molecules 2013, 18(10), 11658-11682; https://doi.org/10.3390/molecules181011658
Received: 2 August 2013 / Revised: 17 September 2013 / Accepted: 17 September 2013 / Published: 25 September 2013
(This article belongs to the Special Issue NMR of Proteins and Small Biomolecules)
Bone Morphogenetic Proteins (BMPs) are secreted protein hormones that act as morphogens and exert essential roles during embryonic development of tissues and organs. Signaling by BMPs occurs via hetero-oligomerization of two types of serine/threonine kinase transmembrane receptors. Due to the small number of available receptors for a large number of BMP ligands ligand-receptor promiscuity presents an evident problem requiring additional regulatory mechanisms for ligand-specific signaling. Such additional regulation is achieved through a plethora of extracellular antagonists, among them members of the Chordin superfamily, that modulate BMP signaling activity by binding. The key-element in Chordin-related antagonists for interacting with BMPs is the von Willebrand type C (VWC) module, which is a small domain of about 50 to 60 residues occurring in many different proteins. Although a structure of the VWC domain of the Chordin-member Crossveinless 2 (CV2) bound to BMP-2 has been determined by X-ray crystallography, the molecular mechanism by which the VWC domain binds BMPs has remained unclear. Here we present the NMR structure of the Danio rerio CV2 VWC1 domain in its unbound state showing that the key features for high affinity binding to BMP-2 is a pre-oriented peptide loop. View Full-Text
Keywords: bone morphogenetic proteins; TGF-β superfamily; BMP antagonist; protein-protein recognition; NMR spectroscopy; von Willebrand type C domain bone morphogenetic proteins; TGF-β superfamily; BMP antagonist; protein-protein recognition; NMR spectroscopy; von Willebrand type C domain
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Fiebig, J.E.; Weidauer, S.E.; Qiu, L.-Y.; Bauer, M.; Schmieder, P.; Beerbaum, M.; Zhang, J.-L.; Oschkinat, H.; Sebald, W.; Mueller, T.D. The Clip-Segment of the von Willebrand Domain 1 of the BMP Modulator Protein Crossveinless 2 Is Preformed. Molecules 2013, 18, 11658-11682.

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