4OEP

Crystal structure of the ZO-1 PDZ1 domain in complex with the 7-mer Claudin1 C-terminal tail

4OEP の概要

• エントリーDOI: 10.2210/pdb4oep/pdb
• 関連するPDBエントリー: 4OEO 4OEQ
• 分子名称: Tight junction protein ZO-1, DODECAETHYLENE GLYCOL, ACETATE ION, ... (4 entities in total)
• 機能のキーワード: maguk, pdz1, scaffolding, cell adhesion, claudin, tight junction assembly
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Cell membrane; Peripheral membrane protein; Cytoplasmic side: Q07157
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 23614.49

構造登録者

Nomme, J.,Lavie, A. (登録日: 2014-01-13, 公開日: 2015-01-14, 最終更新日: 2024-02-28)

主引用文献

Nomme, J.,Antanasijevic, A.,Caffrey, M.,Van Itallie, C.M.,Anderson, J.M.,Fanning, A.S.,Lavie, A.
Structural Basis of a Key Factor Regulating the Affinity between the Zonula Occludens First PDZ Domain and Claudins.
J.Biol.Chem., 290:16595-16606, 2015

PubMed Abstract: The molecular seal between epithelial cells, called the tight junction (TJ), is built by several membrane proteins, with claudins playing the most prominent role. The scaffold proteins of the zonula occludens family are required for the correct localization of claudins and hence formation of the TJ. The intracellular C terminus of claudins binds to the N-terminal PDZ domain of zonula occludens proteins (PDZ1). Of the 23 identified human claudin proteins, nine possess a tyrosine at the -6 position. Here we show that the claudin affinity for PDZ1 is dependent on the presence or absence of this tyrosine and that the affinity is reduced if the tyrosine is modified by phosphorylation. The PDZ1 β2-β3 loop undergoes a significant conformational change to accommodate this tyrosine. Cell culture experiments support a regulatory role for this tyrosine. Plasticity has been recognized as a critical property of TJs that allow cell remodeling and migration. Our work provides a molecular framework for how TJ plasticity may be regulated.

PubMed: 26023235
DOI: 10.1074/jbc.M115.646695

実験手法

X-RAY DIFFRACTION (2.35 Å)