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The bZIP mutant CEBPB(V285A) has sequence specific DNA binding propensities similar to CREB1

ABSTRACT: The bZIP mutant CEBPB(V285A) has sequence specific DNA binding propensities similar to CREB1

PROVIDER: PRJNA438966 | ENA |

REPOSITORIES: ENA

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The bZIP mutant CEBPB(V285A) has sequence specific DNA binding propensities similar to CREB1 [CEBPMut_5mCG]

Project description:The bZIP homodimers CEBPB and CREB1 bind DNA containing methylated cytosines differently. CREB1 binds stronger to the C/EBP half-site GCAA when the cytosine is methylated. For CEBPB, methylation of the same cytosine does not affect DNA binding. The X-ray structure of CREB1 binding the half site GTCA identifies an alanine in the DNA binding region interacting with the methyl group of T, structurally analogous to the methyl group of methylated C. This alanine is replaced with a valine in CEBPB. To explore the contribution of this amino acid to binding with methylated cytosine of the GCAA half-site, we made the reciprocal mutants CEBPB(V285A) and CREB1(A297V) and used protein binding microarrays (PBM) to examine binding to four types of double-stranded DNA (dsDNA): 1) DNA with cytosine in both strands (DNA(C|C)), 2) DNA with 5-methylcytosine (M) in one strand and cytosine in the second strand (DNA(M|C)), 3) DNA with 5-hydroxymethylcytosine (H) in one strand and cytosine in the second strand (DNA(H|C)), and 4) DNA with both cytosines in all CG dinucleotides containing 5mC (DNA(5mCG)). When binding to DNA(C|C), CEBPB (V285A) preferentially binds the CRE consensus motif (TGACGTCA), similar to CREB1. The reciprocal mutant, CREB1(A297V) binds DNA with some similarity to CEBPB with strongest binding to the methylated PAR site 8-mer TTACGTAA. These data demonstrate that V285 residue inhibits CEBPB binding to methylated cytosine of the GCAA half-site.

2019-03-01 | GSE112019 | GEO

The bZIP mutant CEBPB(V285A) has DNA binding propensities similar to CREB1 [CEBPMut_5mC_5hmC]

Project description:The bZIP homodimers CEBPB and CREB1 bind DNA containing methylated cytosines differently. CREB1 binds stronger to the C/EBP half-site GCAA when the cytosine is methylated. For CEBPB, methylation of the same cytosine does not affect DNA binding. The X-ray structure of CREB1 binding the half site GTCA identifies an alanine in the DNA binding region interacting with the methyl group of T, structurally analogous to the methyl group of methylated C. This alanine is replaced with a valine in CEBPB. To explore the contribution of this amino acid to binding with methylated cytosine of the GCAA half-site, we made the reciprocal mutants CEBPB(V285A) and CREB1(A297V) and used protein binding microarrays (PBM) to examine binding to four types of double-stranded DNA (dsDNA): 1) DNA with cytosine in both strands (DNA(C|C)), 2) DNA with 5-methylcytosine (M) in one strand and cytosine in the second strand (DNA(M|C)), 3) DNA with 5-hydroxymethylcytosine (H) in one strand and cytosine in the second strand (DNA(H|C)), and 4) DNA with both cytosines in all CG dinucleotides contain- ing 5mC (DNA(5mCG)). When binding to DNA(C|C), CEBPB (V285A) preferentially binds the CRE consensus motif (TGACGTCA), similar to CREB1. The reciprocal mutant, CREB1(A297V) binds DNA with some similarity to CEBPB with strongest binding to the methylated PAR site 8-mer TTACGTAA. These data demonstrate that V285 residue inhibits CEBPB binding to methylated cytosine of the GCAA half-site.

2019-03-01 | GSE112018 | GEO

The bZIP mutant CEBPB(V285A) has DNA binding propensities similar to CREB1 [CEBPMut_5mC_5hmC]

Project description:The bZIP mutant CEBPB(V285A) has DNA binding propensities similar to CREB1 [CEBPMut_5mC_5hmC]

| PRJNA439166 | ENA

The bZIP mutant CEBPB(V285A) has sequence specific DNA binding propensities similar to CREB1 [CEBPMut_5mCG]

Project description:The bZIP mutant CEBPB(V285A) has sequence specific DNA binding propensities similar to CREB1 [CEBPMut_5mCG]

| PRJNA439167 | ENA

The bZIP mutant CEBPB (V285A) has sequence specific DNA binding propensities similar to CREB1.

Project description: Not available

| S-EPMC8127354 | biostudies-literature

The bZIP mutant CEBPB(V285A) has sequence specific DNA binding propensities similar to CREB1

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

2019-03-01 | GSE112020 | GEO

GABPα and CREB1 binding to double nucleotide polymorphisms of their consensus motifs and cooperative binding to the ETS-CRE motif (ACCGGAAGTGACGTCA).

Project description:Previously, cooperative binding to DNA between the bZIP domain of CREB1 and the ETS domain of GABPα was observed for the composite ETS-CRE motif (A0C1C2G3G4A5A6G7T8G9A10C11G12T13C14A15). Single nucleotide polymorphisms (SNPs) at the beginning and end of the ETS motif (ACCGGAAGT) increased cooperative binding. Here, we use a microarray containing all double nucleotide polymorphisms (DNPs) of the ETS-CRE motif to explore GABPα and CREB1 binding to their canonical motifs and their cooperative binding to the ETS-CRE motif. For GABPα, binding to SNPs predicted binding the DNPs. In contrast, CREB1 binding to DNPs showed cooperativity. Similar results were observed for other ETS and bZIP family members. Cooperative binding between GABPα and CREB1 was typically weaker than expected except for DNPs containing A7 and SNPs at the beginning of the ETS motif.

2020-01-01 | GSE125613 | GEO

Genome-wide survey by ChIP-seq reveals CREB1 regulation of lncRNAs in gastric cancer.

Project description:cAMP responsive element binding protein 1 (CREB1) is a transcription factor belonging to the basic leucine zipper (bZIP) family. Previous studies on the transcriptional regulatory targets of CREB1 have focused on protein-coding genes. The non-coding targets regulated by CREB1 in gastric cancer remain to be further studied. Herein, the genome-wide mapping of CREB1 binding in gastric cancer cell AGS was determined by chromatin immunoprecipitation sequencing.

2024-01-31 | GSE220708 | GEO

bZIP dimers CREB1, ATF2, Zta, ATF3|cJun, and cFos|cJun prefer binding some DNA sequences containing 5-formylcytosine and 5-carboxylcytosine

Project description:In mammalian cells, 5-methylcytosine (5mC) occurs in genomic double-stranded DNA (dsDNA) and is enzymatically oxidized to 5-hydroxymethylcytosine (5hmC), then to 5-formylcytosine (5fC), and finally to 5-carboxylcytosine (5caC). These cytosine modifications are enriched in regulatory regions of the genome. The effect of these oxidative products on five bZIP dimers (CREB1, ATF2, Zta, ATF3|cJun, and cFos|cJun) binding to five types of dsDNA was measured using protein binding microarrays. The five dsDNAs contain either cytosine in both DNA strands or cytosine in one strand and either 5mC, 5hmC, 5fC, or 5caC in the second strand. Some sequences containing the CEBP half-site GCAA are bound more strongly by all five bZIP domains when dsDNA contains 5mC, 5hmC, or 5fC. dsDNA containing 5caC in some TRE (AP-1)-like sequences, e.g., TGACTAA, is better bound by Zta, ATF3|cJun, and cFos|cJun.

2020-11-16 | GSE141050 | GEO

CG methylated microarrays identify novel methylated sequence bound by the CEBPB|ATF4 heterodimer that are active in vivo

Project description:To evaluate the effect of CG methylation on DNA binding of sequence-specific B-ZIP transcription factors (TFs) in a high-throughput manner, we enzymatically methylated the cytosine in the CG dinucleotide on protein binding microarrays. Using this novel technology, we show that CG methylation enhanced binding for CEBPA and CEBPB and inhibited binding for CREB, ATF4, JUN, JUND, CEBPD and CEBPG. The CEBPB|ATF4 heterodimer bound a novel motif CGAT|GCAA 10-fold better when methylated. EMSA confirmed these results. CEBPB ChIP-seq data using primary female mouse dermal fibroblasts with 50X methylome coverage for each strand indicate that the methylated sequences well-bound on the arrays are also bound in vivo. CEBPB bound 39% of the methylated canonical 10-mers ATTGC|GCAAT in the mouse genome. After ATF4 protein induction by thapsigargin which results in ER stress, CEBPB binds methylated CGAT|GCAA in vivo, recapitulating what was observed on the arrays. mRNA-seq of primary female mouse dermal fibroblasts with and without thapsigargin identified differentially expressed genes. Genes that are commonly bound by CEBPB and ATF4 to TGAT|GCAA (the best-bound 8-mer in the array) at the promoters were highly expressed and up-regulated or remained unchanged in the thapsigargin treated primary female mouse dermal fibroblasts. RNA-Seq: Examination of whole genome transcriptome profiles (RNA-seq) of primary mouse dermal fibroblasts with and without Thapsigargin treatment ChIP-Seq: Examination of transcription factor binding in dermal fibroblasts with and without Thapsigargin teratment BS-Seq: Determination of whole genome DNA methylation profiles (BS-seq) of primary mouse dermal fibroblasts

2013-03-08 | E-GEOD-44942 | biostudies-arrayexpress

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