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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Thirty-three novel mutations in the protein C gene. French INSERM network on molecular abnormalities responsible for protein C and protein S.

We analyzed the protein C gene (PROC) with the denaturing gradient gel electrophoresis (DGGE) scanning strategy in a series of 129 patients with suspected protein C (PC) deficiency (93 with low plasma PC levels and 36 with borderline level). At least one sequence variation was found in 104 of the 129 patients. Thirty-nine sequence variations (found in 72 patients) were already reported detrimental mutations. Thirty-three were novel sequence variations, of which 19 (found in 25 patients) were probably detrimental. Five novel mutations (A1T, R9H, S11R, S12R and K193Q) were associated with qualitative plasma PC deficiency, suggesting or confirming the functional importance of amino acids at these positions. This strategy confirmed the diagnosis of inherited PC deficiency in 79/93 (84.9%) patients with low plasma PC levels and 14/36 (38.8%) patients with borderline values. In order to explain abnormal PC levels observed in patients who did not carry detrimental mutations, screening for the -1654C/T and -1641A/G PROC promoter polymorphisms known to influence plasma PC concentrations was performed. The frequency of the CG allele associated with lower PC concentrations was slightly but not significantly lower in 82 heterozygotes for detrimental PROC gene mutations than in 36 patients with no identified detrimental mutations.[1]

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