Project description:To investigate how BACH1 and p53-R175H regulate metastasis-related genes, we transiently transfected Cal-33 cells with control or p53 or BACH1 siRNA to knock down these genes expression. We then performed gene expression profiling analysis using data obtained from RNA-seq of these knockdown cells.
Project description:Proto-oncogene c-jun is a leucine-zipper containing transcription factor which has a DNA binding domain and a transactivation domain. Jun dimerizes with another transcription factor Fos to form AP1 transcription factor. The AP-1 complex has been implicated in transformation and progression of cancer. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf Map binding sites of transcription factor Jun in the genome of K562 cells. The K562 input data has been deposited in GEO as GSM325934.
Project description:Proto-oncogene c-jun is a leucine-zipper containing transcription factor which has a DNA binding domain and a transactivation domain. Jun dimerizes with another transcription factor Fos to form AP1 transcription factor. The AP-1 complex has been implicated in transformation and progression of cancer. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf
Project description:modENCODE_submission_4625 This submission comes from a modENCODE project of Michael Snyder. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: We are identifying the DNA binding sites for 300 transcription factors in C. elegans. Each transcription factor gene is tagged with the same GFP fusion protein, permitting validation of the gene's correct spatio-temporal expression pattern in transgenic animals. Chromatin immunoprecipitation on each strain is peformed using an anti-GFP antibody, and any bound DNA is deep-sequenced using Solexa GA2 technology. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: CHIP-seq. BIOLOGICAL SOURCE: Strain: OP234(official name : OP234 genotype : unc119(ed3);wgIs234(T24H10.7:TY1 EGFP FLAG;unc119) outcross : 3 mutagen : Bombard tags : GFP::3xFlag description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology in Tubiginen using Tony Hyman's recombineering pipeline. The resulting plasmid was used for biolistic transformation of an unc-119(ed3) strain. The JUN-1::EGFP fusion protein is expressed in the correct jun-1 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the JUN-1 transcription factor. made_by : Unknown ); Developmental Stage: L4; Genotype: unc119(ed3);wgIs234(T24H10.7:TY1 EGFP FLAG;unc119); Sex: Hermaphrodite; EXPERIMENTAL FACTORS: Developmental Stage L4; Target gene jun-1; Strain OP234(official name : OP234 genotype : unc119(ed3);wgIs234(T24H10.7:TY1 EGFP FLAG;unc119) outcross : 3 mutagen : Bombard tags : GFP::3xFlag description : This strain's transgene was constructed by Mihail Sarov at the Max Planck Institute for Cell Biology in Tubiginen using Tony Hyman's recombineering pipeline. The resulting plasmid was used for biolistic transformation of an unc-119(ed3) strain. The JUN-1::EGFP fusion protein is expressed in the correct jun-1 spatio-temporal expression pattern. This strain was used for ChIP-seq experiments to map the in vivo binding sites for the JUN-1 transcription factor. made_by : Unknown ); temp (temperature) 20 degree celsius
Project description:Hepatocellular carcinoma (HCC) presents a major health issue due to its rising incidence and limited therapeutic options. The Hippo pathway transducers yes-associated protein (YAP) and WW-domain containing transcription regulator 1 (WWTR1/TAZ) are key regulators of liver tu-morigenesis promoting tumor formation and progression. Although first inhibitors are in clinical trials, targeting the upstream activation of YAP/TAZ could prove equally beneficial. To identify regulators of YAP/TAZ activity, we carried out a proximity labelling approach (BioID) coupled to mass-spectrometry. We verified CRKL as a new YAP-exclusive interaction partner, which is overexpressed in HCC patients correlating with YAP expression and activity as well as poor survival prognosis. In vitro experiments demonstrated CRKL dependent cell survival and loss of YAP binding induced through actin disruption. Moreover, we delineated an activation of the JNK/JUN pathway by CRKL, which promoted YAP transcription. Our data thus illustrated that CRKL not only promoted YAP activity through its binding but also through the induction of YAP transcription by JNK/JUN activation. This highlights the JNK/JUN pathway as a possible target to abrogate YAP expression in HCC patients.
Project description:Axon regeneration is a necessary step toward functional recovery after spinal cord injury. The AP-1 transcription factor c-Jun has long been known to play an important role in directing the transcriptional response of Dorsal Root Ganglion (DRG) neurons to peripheral axotomy that results in successful axon regeneration. Here we performed ChIPseq for Jun in mouse DRG neurons after a sciatic nerve crush or sham surgery in order to measure the changes in Jun’s DNA binding in response to peripheral axotomy. We found that the majority of Jun’s injury-responsive changes in DNA binding occur at putative enhancer elements, rather than proximal to transcription start sites. We also used a series of single polypeptide chain tandem transcription factors to test the effects of different Jun-containing dimers on neurite outgrowth in cortical and hippocampal neurons. These experiments demonstrated that dimers composed of Jun and Atf3 promoted neurite outgrowth in rat CNS neurons. Our work provides new insight into the mechanisms underlying Jun’s role in axon regeneration.
Project description:Human solid tumors contain rare cancer side population (SP) cells, which expel the fluorescencent dye H33342 and display cancer stem cell characteristics. Transcriptional profiling of cancer SP cells isolated by H33342 fluorescence analysis is a newly emerging approach to discover cancer stem cell markers and aberrant differentiation pathways. Using Affymetrix expression microarrays this study investigated differential gene expression between SP and non-SP (NSP) cells isolated from the CAL-51 human mammary carcinoma cell line. Keywords: cell type comparison To characterize differential gene expression between CAL-51 breast cancer SP and NSP cells, three consecutive cell culture passages of CAL-51 were independently subjected to H33342 labeling and dual wavelength fluorescence analysis and were then flow cytometrically sorted into SP and NSP cell fractions. Subsequently, each of the six cell preparations was subjected to global transcriptional profiling using Affymetrix HG U133 Plus 2.0 expression microarrays.
Project description:rs11-09_meotic - time course expression profile of ap1-cal after induction of an ap1-transgene - CDKs are major regulators of the mitotic as well as the meiotic cell cycle. In comparison with the mitotic cell cycle much less is known about the regulation of meiosis, especially in plants. One of the reasons for this is the very low abundance and the difficult accessibility of cell undergoing meiosis. We have developed a system to enrich for meiocytes. This will be the material with which we will search for CDK substrates in a biochemical approach. To first get an overview about the meiotic genes expressed in this system, we want to perform here a time series at four time points after the induction that leads to the synchronized development of meiocytes. The in the microarray identified genes, will then set the frame for the upcoming biochemical experiments. - An ap1-cal double mutants carrying an Glucocorticoid-receptor fusion to AP1 was indcued and samples were collected 2 days after induction (dai), 8dapi, 9dai, 10dai and 11dai. Then, the expression profile of 2dai were compared with 8dai, 8 with 9, 9 with 10, and 10 with 11. 12 dye-swap - time course
Project description:To further dissect whether and how activated JUN reconfigures the chromatin landscape, we performed Chromatin Immunoprecipitation (ChIP)-seq analyses for H3K4me1 and H3K27ac. Based on the significant increase of H3K27ac levels at H3K4me1+ sites, we identified 3,017 JUN-activated enhancers in JUN WT cells. In contrast, JUN AA fails to significantly induce H3K27ac accumulation at these regions. Their enrichment levels at JUN-activated enhancers were significantly decreased after JNKi treatment. Besides, these enhancers are directly driven by JUN, especially phosphorylated JUN.