2VRG

Structure of human MCFD2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: TOTAL ENERGY AND RESTRAINT VIOLATION STATISTICS 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

New insights into multiple coagulation factor deficiency from the solution structure of human MCFD2.

Guy, J.E.Wigren, E.Svard, M.Hard, T.Lindqvist, Y.

(2008) J. Mol. Biol. 381: 941-955

  • DOI: 10.1016/j.jmb.2008.06.042

  • PubMed Abstract: 
  • Human MCFD2 (multiple coagulation factor deficiency 2) is a 16-kDa protein known to participate in transport of the glycosylated human coagulation factors V and VIII along the secretory pathway. Mutations in MCFD2 or in its binding partner, the membr ...

    Human MCFD2 (multiple coagulation factor deficiency 2) is a 16-kDa protein known to participate in transport of the glycosylated human coagulation factors V and VIII along the secretory pathway. Mutations in MCFD2 or in its binding partner, the membrane-bound transporter ERGIC (endoplasmic reticulum-Golgi intermediate compartment)-53, cause a mild form of inherited hemophilia known as combined deficiency of factors V and VIII (F5F8D). While ERGIC-53 is known to be a lectin-type mannose binding protein, the role of MCFD2 in the secretory pathway is comparatively unclear. MCFD2 has been shown to bind both ERGIC-53 and the blood coagulation factors, but little is known about the binding sites or the true function of the protein. In order to facilitate understanding of the function of MCFD2 and the mechanism by which mutations in the protein cause F5F8D, we have determined the structure of human MCFD2 in solution by NMR. Our results show the folding of MCFD2 to be dependent on availability of calcium ions. The protein, which is disordered in the apo state, folds upon binding of Ca(2+) to the two EF-hand motifs of its C-terminus, while retaining some localized disorder in the N-terminus. NMR studies on two disease-causing mutant variants of MCFD2 show both to be predominantly disordered, even in the presence of calcium ions. These results provide an explanation for the previously observed calcium dependence of the MCFD2-ERGIC-53 interaction and, furthermore, clarify the means by which mutations in this protein result in inefficient secretion of blood coagulation factors V and VIII.


    Organizational Affiliation

    Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MULTIPLE COAGULATION FACTOR DEFICIENCY PROTEIN 2
A
124Homo sapiensMutation(s): 0 
Gene Names: MCFD2 (SDNSF)
Find proteins for Q8NI22 (Homo sapiens)
Go to Gene View: MCFD2
Go to UniProtKB:  Q8NI22
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: TOTAL ENERGY AND RESTRAINT VIOLATION STATISTICS 
  • Olderado: 2VRG Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-07-15
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-02-07
    Type: Data collection, Database references, Experimental preparation, Source and taxonomy