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ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator

ABSTRACT: ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator

OTHER RELATED OMICS DATASETS IN: GSE96778PXD006074

PROVIDER: PRJNA379618 | ENA |

REPOSITORIES: ENA

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ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator

Project description:Telomeres constitute the ends of linear chromosomes and together with the shelterin complex form a structure essential for genome maintenance and stability. In addition to the constitutive binding of the shelterin complex, other direct, yet more transient interactions are mediated by the CST complex and HOT1, while subtelomeric variant repeats are recognized by NR2C/F transcription factors. Recently, the Kruppel-like zinc finger protein ZBTB48 has been described as a novel telomere-associated factor in the vertebrate lineage. Here, we show that ZBTB48 binds directly both to telomeric as well as to subtelomeric variant repeat sequences. ZBTB48 is found at telomeres of human cancer cells regardless of the mode of telomere maintenance and it acts as a negative regulator of telomere length. In addition to its telomeric function, we demonstrate through a combination of RNAseq, ChIPseq and expression proteomics experiments that ZBTB48 acts as a transcriptional activator on a small set of target genes, including mitochondrial fission process 1 (MTFP1). This discovery places ZBTB48 at the interface of telomere length regulation, transcriptional control and mitochondrial metabolism.

2017-05-11 | PXD006074 | Pride

ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator [RNA-seq]

Project description:Here we show that ZBTB48 binds directly both to telomeric as well as to subtelomeric variant repeat sequences. ZBTB48 is found at telomeres of human cancer cells regardless of the mode of telomere maintenance and it acts as a negative regulator of telomere length. In addition to its telomeric function, we demonstrate through a combination of RNAseq, ChIPseq and expression proteomics experiments that ZBTB48 acts as a transcriptional activator on a small set of target genes, including mitochondrial fission process 1 (MTFP1). This discovery places ZBTB48 at the interface of telomere length regulation, transcriptional control and mitochondrial metabolism.

2017-05-11 | GSE96777 | GEO

ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator [ChIP-seq]

2017-05-11 | GSE96776 | GEO

ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator.

Project description: Not available

| S-EPMC5452029 | biostudies-literature

ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator

Project description:This SuperSeries is composed of the SubSeries listed below.

2017-05-11 | GSE96778 | GEO

Homo sapiens

Project description:ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator [RNA-seq]

| PRJNA379623 | ENA

Homo sapiens

Project description:ZBTB48 is both a vertebrate telomere-binding protein and a transcriptional activator [ChIP-seq]

| PRJNA379617 | ENA

Gene expression changes by telomere shortening in human colonic organoids

Project description:Gene expression changes of UC-model organoids derive from human colon indcued by telomere enlongation was assessed by Madecassoside treatemt (telomerase activator). Gene expression changes of human colon organoids induced by telomere shortening was assessd by MST-312 treatment (telomerase inhibitor).

2021-06-24 | GSE175994 | GEO

Discovery of Telomere Repeat-binding Zinc finger protein in the malaria parasite Plasmodium falciparum

Project description:ChIP-seq experiments were performed for the putative Telomere Repeat-binding Zinc finger protein (PfTRZ) in the malaria parasite Plasmodium falciparum strain 3D7. The gene encoding this factor (PF3D7_1209300) was endogenously tagged with either a GFP- or a 3xHA-tag and these transgenic parasite lines were used in ChIP-sequencing experiments. Sequencing of the ChIP and input libraries showed enrichment of PfTRZ at all telomere-repeat containing chromosome ends (reference genome Plasmodium falciparum 3D7 from PlasmoDB version 6.1) as well as in all upsB var promoters.In addition,PfTRZ was enriched at seven additional, intra-chromosomal sites and called in the PfTRZ-HA ChIP-seq only.

2016-07-15 | GSE76537 | GEO

The telomere-binding protein Tbf1 demarcates snoRNA gene promoters in Saccharomyces cerevisiae

Project description:The majority of Saccharomyces cerevisiae snoRNA promoters contain an aRCCCTaa sequence motif located at the upstream border of a TATA-containing nucleosome-free region. Genome-wide ChIP-seq analysis showed that these motifs are bound in vivo by Tbf1, a telomere-binding protein known to recognize mammalian-like T2AG3 repeats at sub-telomeric regions. Tbf1 has over 100 additional promoter targets, including the TBF1 gene itself. Tbf1 is required for full snoRNA expression, yet it does not influence nucleosome positioning at snoRNA promoters. Analysis of Tbf1-binding sites in Saccharomyces cerevisiae by ChIP-seq of a Myc-tagged strain and a control untagged strain. 1 sample per strain, 1 lane per sample.

2010-05-28 | E-GEOD-20870 | biostudies-arrayexpress

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