National Institutes of Health/National Institute of Biomedical Imaging and Bioengineering (NIH/NIBIB)
DP2EB020402
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
T32GM008468
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01NS095892
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM115898
米国
American Heart Association
米国
National Institutes of Health/Office of the Director
S10OD021634
米国
pew
米国
引用
ジャーナル: Science / 年: 2017 タイトル: Structure of the mitochondrial inner membrane AAA+ protease YME1 gives insight into substrate processing. 著者: Cristina Puchades / Anthony J Rampello / Mia Shin / Christopher J Giuliano / R Luke Wiseman / Steven E Glynn / Gabriel C Lander / 要旨: We present an atomic model of a substrate-bound inner mitochondrial membrane AAA+ quality control protease in yeast, YME1. Our ~3.4-angstrom cryo-electron microscopy structure reveals how the ...We present an atomic model of a substrate-bound inner mitochondrial membrane AAA+ quality control protease in yeast, YME1. Our ~3.4-angstrom cryo-electron microscopy structure reveals how the adenosine triphosphatases (ATPases) form a closed spiral staircase encircling an unfolded substrate, directing it toward the flat, symmetric protease ring. Three coexisting nucleotide states allosterically induce distinct positioning of tyrosines in the central channel, resulting in substrate engagement and translocation to the negatively charged proteolytic chamber. This tight coordination by a network of conserved residues defines a sequential, around-the-ring adenosine triphosphate hydrolysis cycle that results in stepwise substrate translocation. A hingelike linker accommodates the large-scale nucleotide-driven motions of the ATPase spiral relative to the planar proteolytic base. The translocation mechanism is likely conserved for other AAA+ ATPases.
超分子 #1: YME1 ATPase Protease Walker B mutant bound to substrate
超分子
名称: YME1 ATPase Protease Walker B mutant bound to substrate タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#2 詳細: YME1 Walker B mutant was recombinantly expressed in E. coli, solved in presence of ATP with unknown bound substrate.