title: ATPase-Modulated Stress Granules Contain a Diverse Proteome and Substructure.
abstract: Stress granules are mRNA-protein granules that form when translation initiation is limited, and they are related to pathological granules in various neurodegenerative diseases. Super-resolution microscopy reveals stable substructures, referred to as cores, within stress granules that can be purified. Proteomic analysis of stress granule cores reveals a dense network of protein-protein interactions and links between stress granules and human diseases and identifies ATP-dependent helicases and protein remodelers as conserved stress granule components. ATP is required for stress granule assembly and dynamics. Moreover, multiple ATP-driven machines affect stress granules differently, with the CCT complex inhibiting stress granule assembly, while the MCM and RVB complexes promote stress granule persistence. Our observations suggest that stress granules contain a stable core structure surrounded by a dynamic shell with assembly, disassembly, and transitions between the core and shell modulated by numerous protein and RNA remodeling complexes.
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO 80303, USA.
authors.forename: Saumya
authors.initials: S
authors.lastname: Jain
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO 80303, USA.
authors.forename: Joshua R
authors.initials: JR
authors.lastname: Wheeler
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO 80303, USA.
authors.forename: Robert W
authors.initials: RW
authors.lastname: Walters
authors.affiliation: Double Helix LLC, Boulder, CO 80309, USA.
authors.forename: Anurag
authors.initials: A
authors.lastname: Agrawal
authors.affiliation: Double Helix LLC, Boulder, CO 80309, USA.
authors.forename: Anthony
authors.initials: A
authors.lastname: Barsic
authors.affiliation: Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO 80303, USA; Howard Hughes Medical Institute, University of Colorado Boulder, Boulder, CO 80303, USA. Electronic address: roy.parker@colorado.edu.
authors.forename: Roy
authors.initials: R
authors.lastname: Parker
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D051017:Apoptosis Regulatory Proteins / Q000032:analysis; D045744:Cell Line, Tumor; D003594:Cytoplasmic Granules / Q000737:chemistry* / Q000378:metabolism; D053487:DEAD-box RNA Helicases / Q000032:analysis; D006801:Humans; D019636:Neurodegenerative Diseases / Q000378:metabolism / Q000473:pathology; D020543:Proteome / Q000032:analysis* / Q000187:drug effects; D012333:RNA, Messenger / Q000378:metabolism; D012097:Repressor Proteins / Q000032:analysis; D012261:Ribonucleoproteins / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000032:analysis; D019810:Sodium Azide / Q000494:pharmacology; D015003:Yeasts / Q000166:cytology
chemical_list: C402637:AATF protein, human; D051017:Apoptosis Regulatory Proteins; D020543:Proteome; D012333:RNA, Messenger; D012097:Repressor Proteins; D012261:Ribonucleoproteins; D029701:Saccharomyces cerevisiae Proteins; D019810:Sodium Azide; D000251:Adenosine Triphosphatases; C492152:DED1 protein, S cerevisiae; D053487:DEAD-box RNA Helicases