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Crystal Structure of the LMAN1-CRD/MCFD2 Transport Receptor Complex Provides Insight into Combined Deficiency of Factor V and Factor VIII

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Journal FEBS Lett
Specialty Biochemistry
Date 2010 Feb 9
PMID 20138881
Citations 14
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Abstract

LMAN1 is a glycoprotein receptor, mediating transfer from the ER to the ER-Golgi intermediate compartment. Together with the co-receptor MCFD2, it transports coagulation factors V and VIII. Mutations in LMAN1 and MCFD2 can cause combined deficiency of factors V and VIII (F5F8D). We present the crystal structure of the LMAN1/MCFD2 complex and relate it to patient mutations. Circular dichroism data show that the majority of the substitution mutations give rise to a disordered or severely destabilized MCFD2 protein. The few stable mutation variants are found in the binding surface of the complex leading to impaired LMAN1 binding and F5F8D.

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