4XWO

Structure of Get3 bound to the transmembrane domain of Sec22

4XWO の概要

• エントリーDOI: 10.2210/pdb4xwo/pdb
• 関連するPDBエントリー: 4XTR 4XVU
• 分子名称: ATPase GET3, Antibody heavy chain, Antibody light chain, ... (9 entities in total)
• 機能のキーワード: membrane protein targeting complex, hydrolase-transport protein complex, hydrolase/transport protein
• 由来する生物種: Saccharomyces cerevisiae (ATCC 204508 / S288c) (Baker's yeast); 詳細
• タンパク質・核酸の鎖数: 28
• 化学式量合計: 722954.80

構造登録者

Mateja, A.,Paduch, M.,Chang, H.-Y.,Szydlowska, A.,Kossiakoff, A.A.,Hegde, R.S.,Keenan, R.J. (登録日: 2015-01-29, 公開日: 2015-03-25, 最終更新日: 2023-09-27)

主引用文献

Mateja, A.,Paduch, M.,Chang, H.Y.,Szydlowska, A.,Kossiakoff, A.A.,Hegde, R.S.,Keenan, R.J.
Protein targeting. Structure of the Get3 targeting factor in complex with its membrane protein cargo.
Science, 347:1152-1155, 2015

PubMed Abstract: Tail-anchored (TA) proteins are a physiologically important class of membrane proteins targeted to the endoplasmic reticulum by the conserved guided-entry of TA proteins (GET) pathway. During transit, their hydrophobic transmembrane domains (TMDs) are chaperoned by the cytosolic targeting factor Get3, but the molecular nature of the functional Get3-TA protein targeting complex remains unknown. We reconstituted the physiologic assembly pathway for a functional targeting complex and showed that it comprises a TA protein bound to a Get3 homodimer. Crystal structures of Get3 bound to different TA proteins showed an α-helical TMD occupying a hydrophobic groove that spans the Get3 homodimer. Our data elucidate the mechanism of TA protein recognition and shielding by Get3 and suggest general principles of hydrophobic domain chaperoning by cellular targeting factors.

PubMed: 25745174
DOI: 10.1126/science.1261671

実験手法

X-RAY DIFFRACTION (2.75 Å)