National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
T32GM071399
米国
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
F31NS101807
米国
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
R01GM099836
米国
Department of Energy (DOE, United States)
GM094585
米国
Department of Energy (DOE, United States)
GM115586
米国
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
P41GM103832
米国
引用
ジャーナル: Structure / 年: 2019 タイトル: Structure of Calcarisporiella thermophila Hsp104 Disaggregase that Antagonizes Diverse Proteotoxic Misfolding Events. 著者: Karolina Michalska / Kaiming Zhang / Zachary M March / Catherine Hatzos-Skintges / Grigore Pintilie / Lance Bigelow / Laura M Castellano / Leann J Miles / Meredith E Jackrel / Edward Chuang / ...著者: Karolina Michalska / Kaiming Zhang / Zachary M March / Catherine Hatzos-Skintges / Grigore Pintilie / Lance Bigelow / Laura M Castellano / Leann J Miles / Meredith E Jackrel / Edward Chuang / Robert Jedrzejczak / James Shorter / Wah Chiu / Andrzej Joachimiak / 要旨: Hsp104 is an AAA+ protein disaggregase with powerful amyloid-remodeling activity. All nonmetazoan eukaryotes express Hsp104 while eubacteria express an Hsp104 ortholog, ClpB. However, most studies ...Hsp104 is an AAA+ protein disaggregase with powerful amyloid-remodeling activity. All nonmetazoan eukaryotes express Hsp104 while eubacteria express an Hsp104 ortholog, ClpB. However, most studies have focused on Hsp104 from Saccharomyces cerevisiae and ClpB orthologs from two eubacterial species. Thus, the natural spectrum of Hsp104/ClpB molecular architectures and protein-remodeling activities remains largely unexplored. Here, we report two structures of Hsp104 from the thermophilic fungus Calcarisporiella thermophila (CtHsp104), a 2.70Å crystal structure and 4.0Å cryo-electron microscopy structure. Both structures reveal left-handed, helical assemblies with all domains clearly resolved. We thus provide the highest resolution and most complete view of Hsp104 hexamers to date. We also establish that CtHsp104 antagonizes several toxic protein-misfolding events in vivo where S. cerevisiae Hsp104 is ineffective, including rescue of TDP-43, polyglutamine, and α-synuclein toxicity. We suggest that natural Hsp104 variation is an invaluable, untapped resource for illuminating therapeutic disaggregases for fatal neurodegenerative diseases.