1QYE

Crystal Structure of the N-domain of the ER Hsp90 chaperone GRP94 in complex with 2-chlorodideoxyadenosine

1QYE の概要

• エントリーDOI: 10.2210/pdb1qye/pdb
• 関連するPDBエントリー: 1QY5 1QY8
• 分子名称: Endoplasmin, 2-CHLORODIDEOXYADENOSINE, 1-METHOXY-2-(2-METHOXYETHOXY)ETHANE, ... (4 entities in total)
• 機能のキーワード: grp94, gp96, hsp90, 2cldda, 2-chlorodideoxyadenosine, chaperone
• 由来する生物種: Canis lupus familiaris (dog)
• 細胞内の位置: Endoplasmic reticulum lumen: P41148
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 31046.18

構造登録者

Soldano, K.L.,Jivan, A.,Nicchitta, C.V.,Gewirth, D.T. (登録日: 2003-09-10, 公開日: 2003-11-11, 最終更新日: 2023-08-23)

主引用文献

Soldano, K.L.,Jivan, A.,Nicchitta, C.V.,Gewirth, D.T.
Structure of the N-terminal Domain of GRP94. Basis for Ligand Specificity and Regulation
J.Biol.Chem., 278:48330-48338, 2003

PubMed Abstract: GRP94, the endoplasmic reticulum (ER) paralog of the chaperone Hsp90, plays an essential role in the structural maturation or secretion of a subset of proteins destined for transport to the cell surface, such as the Toll-like receptors 2 and 4, and IgG, respectively. GRP94 differs from cytoplasmic Hsp90 by exhibiting very weak ATP binding and hydrolysis activity. GRP94 also binds selectively to a series of substituted adenosine analogs. The high resolution crystal structures at 1.75-2.1 A of the N-terminal and adjacent charged domains of GRP94 in complex with N-ethylcarboxamidoadenosine, radicicol, and 2-chlorodideoxyadenosine reveals a structural mechanism for ligand discrimination among hsp90 family members. The structures also identify a putative subdomain that may act as a ligand-responsive switch. The residues of the charged region fold into a disordered loop whose termini are ordered and continue the twisted beta sheet that forms the structural core of the N-domain. This continuation of the beta sheet past the charged domain suggests a structural basis for the association of the N-terminal and middle domains of the full-length chaperone.

PubMed: 12970348
DOI: 10.1074/jbc.M308661200

実験手法

X-RAY DIFFRACTION (2.1 Å)