Molecular analysis of factor VII deficiency in Italy: a frequent mutation (FVII Lazio) in a repeated intronic region
| Autor: | Francesco Bernardi, Giovanna Marchetti, Donato Gemmati, P. Arcieri, M. Papacchini, P. Patracchini, F. Baudo, R. Redaelli, M. Ferrati, G. Mariani |
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| Rok vydání: | 1993 |
| Předmět: |
Male
Linkage disequilibrium Factor VII Deficiency DNA Mutational Analysis Molecular Sequence Data Restriction Mapping Biology Compound heterozygosity chemistry.chemical_compound Gene Frequency Consensus Sequence Genetics Humans Point Mutation Missense mutation Repeated sequence Genetics (clinical) Repetitive Sequences Nucleic Acid Polymorphism Genetic Base Sequence Factor VII Haplotype Intron Introns Pedigree Italy chemistry Female Founder effect |
| Zdroj: | Human Genetics. 92:446-450 |
| ISSN: | 1432-1203 0340-6717 |
| DOI: | 10.1007/bf00216448 |
| Popis: | Molecular defects and polymorphic haplotypes of coagulation factor VII gene were studied in eight unrelated Italian subjects with factor VII deficiency, seven having the factor VII- variant, one the factor VIIR variant. An intron 7 mutation, which alters the consensus donor splice site sequence, was found in six subjects. The presence of the founder effect is suggested by their common geographical origin (a mountain area in the Lazio region) and by the identical polymorphic haplotype underlying the mutation. A different mutation, also located in the 5' monomer of the repeated intron 7 sequence, was found in the heterozygous condition in a subject from Northern Italy. New polymorphic alleles were detected in the repeated intron 7 region in subjects from Eastern Africa. Two missense mutations in codon 97 (Gly--Cys, Gly--Ser), the first found in the compound heterozygous condition with the frequent intron 7 mutation, suggest the presence of a hot spot mutation site in the second epidermal growth factor domain. Two neutral dimorphisms at codon 333Ser and 115His were detected, the last in linkage disequilibrium with the 353Arg/Gln polymorphism, and showing differences in frequency in the FVII deficient and control subjects. |
| Databáze: | OpenAIRE |
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