PXD009854-1

PXD009854 is an original dataset announced via ProteomeXchange.

Title	Structural plasticity of actin-spectrin membrane skeleton and functional role of actin and spectrin in axon degeneration
Description	Axon degeneration sculpts precise patterns of connectivity in the developing nervous system and is an early pathological hallmark of several adult-onset neurodegenerative disorders. Substantial progress has been made in identifying effector mechanisms that drive axon fragmentation, but far less is known about the upstream signaling pathways that initiate this process. Here we describe a role for the newly discovered axonal Membrane-associated Periodic Skeleton (MPS) –a quasi-1D periodic ultrastructure composed of actin, spectrin and associated molecules– during sensory axon degeneration. We find that trophic deprivation (TD) of sensory axons causes a rapid breakdown in the periodicity of the MPS in distal axons. These structural changes occur prior to and independently of caspase-driven axon fragmentation. We further show that acute actin destabilization to break down the MPS can initiate TD-related retrograde signaling. Actin stabilization prevents MPS breakdown during TD and blocks this signal. Moreover, deletion of βII-spectrin (Sptbn1), an obligate component of the MPS, suppresses this retrograde signaling and protects axons against degeneration. Together our data suggest that ultrastructural plasticity of the MPS underlies the earliest steps of axon degeneration.
HostingRepository	PRIDE
AnnounceDate	2019-03-14
AnnouncementXML	Submission_2019-03-14_01:20:44.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	henrik molina
SpeciesList	scientific name: Mus musculus (Mouse); NCBI TaxID: 10090;
ModificationList	phosphorylated residue
Instrument	Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2018-05-22 01:41:28	ID requested
⏵ 1	2019-03-14 01:20:45	announced
2	2019-05-07 09:06:06	announced	Updated publication reference for PubMed record(s): 31042147.
3	2024-10-22 04:13:20	announced	2024-10-22: Updated project metadata.

Dataset with its publication pending

curator keyword: Biological, Biomedical

submitter keyword: Axon Degeneration, phosphorylation, proteomics

David J. Simon
contact affiliation	Department of Biology, Stanford University, Stanford, CA, 94305
contact email	djsimon@stanford.edu
lab head
henrik molina
contact affiliation	THE ROCKEFELLER UNIVERSITY
contact email	henrik.molina@gmail.com
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/2019/03/PXD009854

PRIDE project URI

• PRIDE
  1. PXD009854
     1. Label: PRIDE project
     2. Name: Structural plasticity of actin-spectrin membrane skeleton and functional role of actin and spectrin in axon degeneration