Abstract
Factor VIII (FVIII, other clotting factors are named similarly) is a glycoprotein that circulates in the plasma bound to von Willebrand factor. During the blood coagulation cascade, activated FVIII (FVIIIa) binds to FIXa and activates FX in the presence of calcium ions and phospholipid membranes. The C1 and C2 domains mediate membrane binding that is essential for activation of the FVIIIa–FIXa complex. Here, 1H, 13C, and 15N backbone chemical shift assignments are reported for the C2 domain of FVIII, including assignments for the residues in solvent-exposed loops. The NMR resonance assignments, along with further structural studies of membrane-bound FVIII, will advance understanding of blood-clotting protein interactions.
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Acknowledgments
This work was supported by National Institutes of Health grant P01HL42443 (to JDB), National Institutes of Health grant R01HL103999 (to CMR), and the Research Service of the Veterans Administration (GEG). Fellowship support was provided by a National Science Foundation Graduate Research Fellowship to KMN. KMN wishes to thank Gemma Comellas and Dr. Anna E. Nesbitt for insightful discussions.
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Kristin M. Nuzzio and David B. Cullinan contributed equally to this work.
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Nuzzio, K.M., Cullinan, D.B., Novakovic, V.A. et al. Backbone resonance assignments of the C2 domain of coagulation factor VIII. Biomol NMR Assign 7, 31–34 (2013). https://doi.org/10.1007/s12104-012-9370-5
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DOI: https://doi.org/10.1007/s12104-012-9370-5