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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク JAG1 ： ウィキペディア英語版 JAG1 Jagged1 (''JAG1'') is one of five cell surface proteins (ligands) that interact with 4 receptors in the mammalian Notch signaling pathway. The Notch Signaling Pathway is a highly conserved pathway that functions to establish and regulate cell fate decisions in many organ systems. Once the JAG1-NOTCH (receptor-ligand) interactions take place, a cascade of proteolytic cleavages is triggered resulting in activation of the transcription for downstream target genes. Located on human chromosome 20, the ''JAG1'' gene is expressed in multiple organ systems in the body and causes the autosomal dominant disorder Alagille syndrome (ALGS) resulting from loss of function mutations within the gene. ''JAG1'' has also been designated as CD339 (cluster of differentiation 339). ==Structure and function== ''JAG1'' was first identified as a ligand that was able to activate notch receptors when it was cloned in the mammalian rat in 1995. It is located at cytogenetic location 20p12.2 and genomic location (GRCh37) (chr20:10,618,331-10,654,693 ) on the human chromosome 20. The structure of the JAG1 protein includes a small intracellular component, a transmembrane motif, proceeded by an extracellular region containing a cystine-rich region, 16 EGF-like repeats, a DSL domain, and finally a signal peptide totaling 1218 amino acids in length over 26 coding exons. The JAG1 protein encoded by ''JAG1'' is the human homolog of the Drosophilia jagged protein.〔 Human JAG1 is one of five ligands for receptors in the NOTCH signaling pathway which helps to determine cellular fate and is active during many developmental stages. The extracellular component of the JAG1 protein physically interacts with its respective Notch receptor. This interaction kicks off a cascade of proteolytic cleavages leading to the original NOTCH intracellular domain being trafficked into the nucleus of the cell leading to the activation of different target genes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「JAG1」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.