Genomic structure of the canalicular multispecific organic anion-transporter gene (MRP2/cMOAT) and mutations in the ATP- binding-cassette region in Dubin-Johnson syndrome

Satoshi Toh, Morimasa Wada, Takeshi Uchiumi, Akihiko Inokuchi, Yoshinari Makino, Yutaka Horie, Yukihiko Adachi, Shotaro Sakisaka, Michihiko Kuwano

研究成果: Contribution to journalArticle査読

212 被引用数 (Scopus)

抄録

Dubin-Johnson syndrome (DJS) is an autosomal recessive disease characterized by conjugated hyperbilirubinemia. Previous studies of the defects in the human canalicular multispecific organic anion transporter gene (MRP2/cMOAT) in patients with DJS have suggested that the gene defects are responsible for DJS. In this study, we determined the exon/intron structure of the human MRP2/cMOAT gene and further characterized mutations in patients with DJS. The human MRP2/cMOAT gene contains 32 exons, and it has a structure that is highly conserved with that of another ATP- binding-cassette gene, that for a multidrug resistance-associated protein. We then identified three mutations, including two novel ones. All mutations identified to date are in the cytoplasmic domain, which includes the two ATP-binding cassettes and the linker region, or adjacent putative transmembrane domain. Our results confirm that MRP2/cMOAT is the gene responsible for DJS. The finding that mutations are concentrated in the first ATP- binding-cassette domain strongly suggests that a disruption of this region is a critical route to loss of function.

本文言語英語
ページ(範囲)739-746
ページ数8
ジャーナルAmerican journal of human genetics
64
3
DOI
出版ステータス出版済み - 1999
外部発表はい

All Science Journal Classification (ASJC) codes

  • 遺伝学
  • 遺伝学(臨床)

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