A non-sense mutation at Arg95 is predominant in complement 9 deficiency in Japanese

Takahiko Horiuchi, Hiroaki Nishizaka, Takeshi Kojima, Takuya Sawabe, Yoshiyuki Niho, Peter M. Schneider, Shoichi Inaba, Kouko Sakai, Kenshi Hayashi, Chinami Hashimura, Yasuo Fukumori

研究成果: ジャーナルへの寄稿記事

30 引用 (Scopus)

抜粋

Deficiency of the ninth component of complement (C9D) is one of the most common genetic abnormalities in Japan, with an incidence of one homozygote in 1000. Although C9D individuals are usually healthy, it has been shown that they have an significantly increased risk of developing meningococcal meningitis. In the present study we report the molecular bases for C9D in 10 unrelated Japanese subjects. As a screening step for mutations, exons 2 to 11 of the C9 gene were analyzed using exon-specific PCR/single-strand conformation polymorphism analysis, which demonstrated aberrantly migrating DNA bands in exon 4 in all the C9D subjects. Subsequent direct sequencing of exon 4 of the C9D subjects revealed that eight of the 10 C9D subjects were homozygous for a C to T transition at nucleotide 343, the first nucleotide of the codon CGA for Arg95, leading to a TGA stop codon (R95X). R95X is a novel mutation different from those recently identified in a Swiss family with C9D. Cases 6 and 7 were heterozygous for the R95X mutation. Family study in case 10 confirmed the genetic nature of the defect. In case 6, the second mutation for C9D of the C9 gene was identified to be the substitution of Cys to Tyr at amino acid residue 507 (C507Y), while the genetic defect(s) in the other allele in case 7 remains unknown. Our results indicate that a novel mutation, R95X, is present in most cases of C9D in Japan.

元の言語英語
ページ(範囲)1509-1513
ページ数5
ジャーナルJournal of Immunology
160
発行部数3
出版物ステータス出版済み - 2 1 1998

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology

これを引用

Horiuchi, T., Nishizaka, H., Kojima, T., Sawabe, T., Niho, Y., Schneider, P. M., ... Fukumori, Y. (1998). A non-sense mutation at Arg95 is predominant in complement 9 deficiency in Japanese. Journal of Immunology, 160(3), 1509-1513.