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PXD012702

PXD012702 is an original dataset announced via ProteomeXchange.

Dataset Summary
TitleA pathogenic CtBP1 missense mutation causes altered cofactor binding and transcriptional activity
DescriptionWe previously reported a pathogenic de novo W342 mutation in the transcriptional corepressor CtBP1 in four independent patients with neurodevelopmental disabilities. Here, we report the clinical phenotypes of seven additional individuals with the same recurrent de novo CtBP1 mutation. Within this cohort we identified consistent CtBP1-related phenotypes of intellectual disability, ataxia, hypotonia and tooth enamel defects present in all patients. The W342 mutation in CtBP1 is located within a region implicated in a high affinity-binding cleft for CtBP-interacting proteins. Unbiased proteomic analysis demonstrated reduced interaction of several chromatin modifying factors with the CtBP1 W342 mutant. Genome-wide transcriptome analysis in human glioblastoma cells lines expressing -CtBP1 R342 (wt) or W342 mutation revealed changes in the expression profiles of genes controlling multiple cellular processes. Patient-derived dermal fibroblasts were found to be more sensitive to apoptosis during acute glucose deprivation compared to controls. Glucose deprivation strongly activated the BH3-only pro-apoptotic gene NOXA, suggesting a link between enhanced cell death and NOXA expression in patient fibroblasts. Our results suggest that context-dependent relief of transcriptional repression of the CtBP1 mutant W342 allele may contribute to deregulation of apoptosis in target tissues of patients leading to neurodevelopmental phenotypes.
HostingRepositoryPRIDE
AnnounceDate2019-05-09
AnnouncementXMLSubmission_2019-05-09_00:16:37.xml
DigitalObjectIdentifierhttps://dx.doi.org/10.6019/PXD012702
ReviewLevelPeer-reviewed dataset
DatasetOriginOriginal dataset
RepositorySupportSupported dataset by repository
PrimarySubmitterThirugnana Subramanian
SpeciesList scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationListOxidation; Acetyl; Carbamidomethyl
InstrumentLTQ Orbitrap Velos; LTQ Orbitrap
Dataset History
RevisionDatetimeStatusChangeLog Entry
02019-02-14 02:02:08ID requested
12019-05-09 00:16:38announced
Publication List
Beck DB, Subramanian T, Vijayalingam S, Ezekiel UR, Donkervoort S, Yang ML, Dubbs HA, Ortiz-Gonzalez XR, Lakhani S, Segal D, Au M, Graham JM, Verma S, Waggoner D, Shinawi M, B, รถ, nnemann CG, Chung WK, Chinnadurai G, A pathogenic CtBP1 missense mutation causes altered cofactor binding and transcriptional activity. Neurogenetics, 20(3):129-143(2019) [pubmed]
Keyword List
submitter keyword: Human, CtBP1, Proteomics
Contact List
G. Chinnadurai
contact affiliationSaint Louis University
contact emailchinnag@slu.edu
lab head
Thirugnana Subramanian
contact affiliationSt. Louis University
contact emailsubramt@slu.edu
dataset submitter
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Dataset FTP location
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