PXD048693

PXD048693 is an original dataset announced via ProteomeXchange.

Title	CRISPR screen for protein inclusion formation uncovers a role for SRRD in the regulation of intermediate filament dynamics and aggresome assembly
Description	The presence of large protein inclusions is a hallmark of neurodegeneration, and yet the precise molecular factors that contribute to their formation remain poorly understood. Screens using aggregation-prone proteins have commonly relied on downstream toxicity as a readout rather than the direct formation of aggregates. Here, we combined a genome-wide CRISPR knockout screen with Pulse Shape Analysis, a FACS-based method for inclusion detection, to identify direct modifiers of TDP-43 aggregation in human cells. Our screen revealed both canonical and novel proteostasis genes, and unearthed SRRD,a poorly characterized protein, as a top regulator of protein inclusion formation. APEX biotin labeling reveals that SRRD resides in proximity to proteins that are involved in the formation and breakage of disulfide bonds and to intermediate filaments, suggesting a role in regulation of the spatial dynamics of the intermediate filament network. Indeed, loss of SRRD results in aberrant intermediatefilament fibrils and the impaired formation of aggresomes, including blunted vimentin cage structure, during proteotoxic stress. Interestingly, SRRD also localizes to aggresomes and unfolded proteins, and rescues proteotoxicity in yeast whereby the its N-terminal low complexity domain is sufficient to induce this affect. Altogether this suggests an unanticipated and broad role for SRRD in cytoskeletal organization and cellular proteostasis.
HostingRepository	PRIDE
AnnounceDate	2024-01-24
AnnouncementXML	Submission_2024-01-24_08:52:18.291.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Hossein Fazelinia
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	No PTMs are included in the dataset
Instrument	Orbitrap Exploris 480

Revision	Datetime	Status	ChangeLog Entry
0	2024-01-18 10:43:45	ID requested
⏵ 1	2024-01-24 08:52:18	announced

Dataset with its publication pending

submitter keyword: CRISPR, APEX biotin labeling, Aggresome assembly, Cellular proteostasis, Neurodegeneration, Cytoskeletal organization

Ophir Shalem, Ph.D.
contact affiliation	University of Pennsylvania Department of Genetics 5050 Colket Translational Research Building 3501 Civic Center Boulevard Philadelphia, PA 19104, USA
contact email	shalemo@upenn.edu
lab head
Hossein Fazelinia
contact affiliation	Children's Hospital of Philadelphia
contact email	fazeliniah@email.chop.edu
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2024/01/PXD048693

PRIDE project URI

• PRIDE
  1. PXD048693
     1. Label: PRIDE project
     2. Name: CRISPR screen for protein inclusion formation uncovers a role for SRRD in the regulation of intermediate filament dynamics and aggresome assembly