PXD022596

PXD022596 is an original dataset announced via ProteomeXchange.

Title	SOX4 AND SMARCA4 COOPERATIVELY REGULATE PI3K SIGNALING THROUGH TRANSCRIPTIONAL ACTIVATION OF TGFBR2 IN TRIPLE NEGATIVE BREAST CANCER
Description	Dysregulation of PI3K/Akt signaling is a dominant feature in basal-like or triple-negative breast cancers (TNBC). However, the mechanisms regulating this pathway are largely unknown in this subset of aggressive tumors. Here we demonstrate that the transcription factor SOX4 is a key regulator of PI3K signaling in TNBC. Genomic and proteomic analyses coupled with mechanistic studies identified TGFBR2 as a direct transcriptional target of SOX4 and demonstrated that TGFBR2 is required to mediate SOX4-dependent PI3K signaling. We further report that SOX4 and the SWI/SNF ATPase SMARCA4, which are uniformly overexpressed in basal-like tumors, form a previously unreported complex that is required to maintain an open chromatin conformation at the TGFBR2 regulatory regions in order to mediate TGFBR2 expression and PI3K signaling. Collectively, our findings delineate the mechanism by which SOX4 and SMARCA4 cooperatively regulate PI3K/Akt signaling and suggest that this complex may play an essential role in TNBC genesis and/or progression. Kinase enrichment proteomic analysis was performed using HCC1143 breast cancer cells treated with a control siRNA pool or a pool targeting SOX4 in biological triplicate to evaluate the effects on the functional kinome.
HostingRepository	PRIDE
AnnounceDate	2021-03-03
AnnouncementXML	Submission_2021-03-02_22:29:45.648.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Steven Angus
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	acetylated residue; monohydroxylated residue; iodoacetamide derivatized residue
Instrument	Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2020-11-18 01:40:29	ID requested
⏵ 1	2021-03-02 22:29:46	announced

Dataset with its publication pending

submitter keyword: SOX4, TGFBR2, SMARCA4, SWI/SNF, PI3 kinase, transcription, chromatin, epigenetics, breast cancer

Michael L. Gatza, PhD
contact affiliation	Department of Radiation Oncology, Robert Wood Johnson Medical School, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ
contact email	michael.gatza@cinj.rutgers.edu
lab head
Steven Angus
contact affiliation	Indiana University School of Medicine
contact email	sangus@iu.edu
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD022596
     1. Label: PRIDE project
     2. Name: SOX4 AND SMARCA4 COOPERATIVELY REGULATE PI3K SIGNALING THROUGH TRANSCRIPTIONAL ACTIVATION OF TGFBR2 IN TRIPLE NEGATIVE BREAST CANCER