Molecular analysis in two Tunisian families with combined factor V and factor VIII deficiency.
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Abdallah HE, Gouider E, Amor MB, Jlizi A, Meddeb B, Elgaaied A
Molecular analysis in two Tunisian families with combined factor V and factor VIII deficiency.
Haemophilia. 2010 Sep 1;16(5):801-4. doi: 10.1111/j.1365-2516.2010.02268.x. Epub 2010 May 19.
- PubMed ID
- 20491958 [ View in PubMed]
- Abstract
SUMMARY: Combined factor V (FV) and factor VIII (FVIII) deficiency (F5F8D) is a rare autosomal recessive disorder caused by mutations in LMAN1 or MCFD2 genes which encode proteins that form a complex involved in the transport of FV and FVIII from the endoplasmic reticulum to Golgi apparatus. We report two novel mutations in MCFD2 gene and one recurrent mutation in LMAN1 gene that caused combined FV and FVIII deficiency in two unrelated Tunisian Muslim families. For the first family two patients were homozygous for a new missense mutation Asp81His in exon 3 of MCFD2 and heterozygous for a second new missense mutation Val100Asp in the same exon. Replacement respectively of the hydrophilic Asp residue with hydrophobic positively charged His and of the hydrophobic neutral Val residue with the Asp residue most likely disrupts the MCFD2-LMAN1 interaction, thus leading to the disease phenotype. For the second family a reported Arg202X mutation in exon 5 in the LMAN1 gene was identified in the homozygous state.