PXD026699

PXD026699 is an original dataset announced via ProteomeXchange.

Title	Synaptotagmin 13 drives pancreatic endocrine cell egression and islet morphogenesis: BioID
Description	Identification of protein intreactions for the synaptotagmin 13 protein from MDCK cells by BioID-based proximity labelling and LFQ mass spectrometry. Epithelial cell egression is important for organ development and cell differentiation, but also drives cancer metastasis. The tightly connected pancreatic epithelial differentiation and morphogenesis generate islets of Langerhans. However, the morphogenetic drivers and molecular mechanisms are largely unresolved. Here we identify the uncharacterized Synaptotagmin 13 (Syt13) as a major regulator of endocrine cell egression and islet morphogenesis and differentiation. We detected upregulation of Syt13 in endocrine precursors that associates with increased expression of several unique cytoskeletal components. High-resolution imaging reveals a previously unidentified apical-basal to front-rear repolarization during endocrine cell egression. Strikingly, Syt13 directly interacts with acetylated tubulin and phosphoinositide phospholipids to be recruited to the leading edge of egressing cells. Knockout of Syt13 discloses the impairment in endocrine cell egression and skews the α-to-β-cell ratio. At mechanistic levels, Syt13 regulates protein endocytosis to remodel the basement membrane and modulate cell-matrix adhesion at the leading edge of egressing endocrine cells. Altogether, these findings implicate that Ca2+-independent atypical Syt13 vesicular protein functions in regulating cell polarity to orchestrate endocrine cell egression and tissue morphogenesis.
HostingRepository	PRIDE
AnnounceDate	2022-06-23
AnnouncementXML	Submission_2022-06-23_07:32:09.447.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Karsten Boldt
SpeciesList	scientific name: Canis lupus x Canis lupus familiaris; NCBI TaxID: 990119;
ModificationList	acetylated residue; monohydroxylated residue; iodoacetamide derivatized residue
Instrument	Orbitrap Fusion

Revision	Datetime	Status	ChangeLog Entry
0	2021-06-14 10:29:56	ID requested
⏵ 1	2022-06-23 07:32:09	announced

Dataset with its publication pending

submitter keyword: Synaptotagmin 13, proximity labelling, BioID, protein interactions

Dr. Karsten Boldt
contact affiliation	Medical Bioanalytics Institute for Ophthalmic Research Eberhard-Karls University of Tuebingen
contact email	karsten.boldt@uni-tuebingen.de
lab head
Karsten Boldt
contact affiliation	Medical Bioanalytics
contact email	karsten.boldt@uni-tuebingen.de
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD026699
     1. Label: PRIDE project
     2. Name: Synaptotagmin 13 drives pancreatic endocrine cell egression and islet morphogenesis: BioID