Protein C deficiency: Identification of a novel two‐base pair insertion and two point mutations in exon 7 of the protein C gene in Spanish families

José Manuel Soria, Jordi Fontcuberta, Montserrat Borrell, Xavier P. Estivill, Núria Sala

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We have applied single‐strand conformation polymorphism (SSCP) to the analysis of exon 7 of the anticoagulant protein C (PC) gene, in 13 PC‐deficient Spanish families. Abnormal patterns were visualized in three samples from type I or quantitative PC deficient proposita. A previously undescribed mutation due to a TT insertion after nucleotide 6139, between codons Gly‐142 and Arg‐143 was found in one family. The mutation (6139,ins TT) should result in a frameshift with a stop at codon 156, which agrees with the presence of a type I or quantitative PC deficiency in the affected members of the family. The second mutation identified was a C to T transition at nucleotide 6274, 9 base pairs into intron G. This mutation (6274,C→T), found for the first time in a Spanish family, is identical to the previously characterized PC Sant Louis. The third mutation was a G to A transition that replaces arginine 178 with glutamine (178,R→Q). This is the third case of 178,R→Q mutation in 17 apparently unrelated Spanish families with type I PC deficiency. Furthermore, SSCP analysis allowed the detection of another previously described mutation in a PC‐deficient Spanish family (178,R→W). © 1992 Wiley‐Liss, Inc.

Original languageEnglish
Pages (from-to)428-431
Number of pages4
JournalHuman Mutation
Issue number5
Publication statusPublished - 1992
Externally publishedYes



  • Frameshift mutation
  • Missense mutation
  • Protein C deficiency
  • SSCP analysis

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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