オオニシ　ジュンジ  onishi junji
大西　淳之

  • 所属   東京家政大学  栄養学部 管理栄養学科
  •     東京家政大学大学院  人間生活学総合研究科 健康栄養学専攻
  •     東京家政大学大学院  人間生活学総合研究科 人間生活学専攻
  •     東京家政大学短期大学部  短期大学部 栄養科
  • 職種   教授
論文種別 原著
言語種別 英語
査読の有無 査読あり
表題 Nemo-like kinase, an essential effector of anterior formation, functions downstream of p38 mitogen-activated protein kinase.
掲載誌名 正式名：Molecular and Cellular Biology
略　 称：Mol Cell Biol
ISSNコード：02707306/10985549
掲載区分国外
巻・号・頁 30(3),pp.675-683
著者・共著者 ◎Ohnishi E, Goto T, Sato A, Kim MS, Iemura S, Ishitani T, Natsume T, Ohnishi J, Shibuya H.
発行年月 2010/02
概要 Nemo-like kinase (NLK) is known to function as a mitogen-activated protein kinase (MAPK)-like kinase. However, the upstream molecules and molecular mechanisms that regulate NLK activity remain unclear. In the present study, we identified p38 MAPK as an upstream kinase and activator of NLK. p38 regulates the function of NLK via phosphorylation, and this modification can be abrogated by depletion of endogenous p38. In Xenopus laevis embryos, depletion of either p38beta or NLK by antisense morpholino oligonucleotides results in a severe defect in anterior development and impaired expression of endogenous anterior markers. It is notable that morphants of Xenopus p38alpha, another isoform of the p38 MAPK family, exhibited no obvious defects in anterior development. Defects in head formation or in the expression of anterior marker genes caused by suppression of endogenous p38beta expression could be rescued by expression of wild-type NLK but not by expression of mutant NLK lacking the p38beta phosphorylation site. In contrast, defects in head formation or in the expression of anterior marker genes caused by suppression of endogenous NLK expression could not be rescued by expression of p38. These results provide the first evidence that p38 specifically regulates NLK function, which is required for anterior formation in Xenopus development.
DOI doi: 10.1128/MCB.00576-09