Thromb Haemost 1992; 68(04): 455-459
DOI: 10.1055/s-0038-1646296
Original Article
Schattauer GmbH Stuttgart

Two New Nonsense Mutations in Type Ia Antithrombin III Deficiency at Leu 140 and Arg 197

Akira Tomonari
The First Department of Internal Medicine, The University of Tokushima, Japan
,
Hiroyuki Iwahana
1   The Otsuka Department of Clinical and Molecular Nutrition, School of Medicine, The University of Tokushima, Japan
,
Katsuhiko Yoshimoto
1   The Otsuka Department of Clinical and Molecular Nutrition, School of Medicine, The University of Tokushima, Japan
,
Toshio Shigekiyo
The First Department of Internal Medicine, The University of Tokushima, Japan
,
Shiro Saito
The First Department of Internal Medicine, The University of Tokushima, Japan
,
Mitsuo Itakura
1   The Otsuka Department of Clinical and Molecular Nutrition, School of Medicine, The University of Tokushima, Japan
› Author Affiliations
Further Information

Publication History

Received 10 March 1992

Accepted after revision 20 May 1992

Publication Date:
04 July 2018 (online)

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Summary

Using polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) and DNA sequencing, the molecular basis of hereditary type la antithrombin III (AT III) deficiency was disclosed in two families. One mutation was a change from T to A in the codon of TTA for Leu 140 forming a stop codon of TAA, which was confirmed by mutated primer-mediated PCR-HindIII digestion. The application of this method demonstrated that all four affected members had the mutant allele in a heterozygous state and that none of unaffected subjects had this mutation. Another mutation in the second family was a change from C to T in the codon of CGA for Arg 197 also forming a stop codon of TGA, which was confirmed by PCR-HaeIII digestion. Based on these, it was concluded that the two new nonsense mutations in the AT III gene in a heterozygous state are the molecular basis of hereditary type Ia AT III deficiency.