Project description:Screening for mouse cDNA that was highly expressed in positive-selector H-2b AND-TCR-transgenic thymocytes using Affymetrix Murine Genome arrays. Experiment Overall Design: 2 thymocytes, H-2b AND-TCR-transgenic thymocytes and C57BL/6 thymocytes, were analyzed by duplicate hybridization.
Project description:Screening for mouse cDNA that was highly expressed in positive-selector H-2b AND-TCR-transgenic thymocytes using Affymetrix Murine Genome arrays. Keywords: transgenic mouse
Project description:It is known that ubiquitination is important for T cell receptor (TCR) signaling during T cell activation but the breadth of ubiquitination events triggered during TCR signaling is not completely understood. This dataset utilizes di-glycine remnant profiling combined with mass spectrometry to identify a global landscape of ubiquitination events downstream of the TCR and to quantify changes ubiquitin abundance in response to TCR stimulation. Additionally, whole cell proteomics data were generated to measure protein abundances during TCR stimulation. Mouse primary T cells were isolated, proliferated and either remained resting or stimulated with CD3/CD28 to activate downstream signaling through the TCR and co-stimulatory pathways. Di-glycine remnant profiling and whole cell proteomics was performed on rested cells and cells that had undergone CD3/CD28 TCR stimulation for 4 hours. These data were analyzed to identify the ubiquitination events during TCR activation and to quantify the change in peptide-based ubiquitin abundance and total protein abundance over the course of the 4 hour TCR stimulation. Integration of di-glycine and whole cell proteomics was used to generate protein-specific predictions of whether ubiquitination events downstream of TCR signaling lead to a decrease in associated protein abundance. The analysis of these data suggests that T cell activation leads to an increase in ubiquitination that is not associated with proteasomal or lysosomal degradation.
Project description:Combined analysis of oligonucleotide microarray data from transgenic and knockout mice identifies direct SREBP target genes [MG_U74Bv2]
Project description:Combined analysis of oligonucleotide microarray data from transgenic and knockout mice identifies direct SREBP target genes [MG_U74Cv2]
Project description:Combined analysis of oligonucleotide microarray data from transgenic and knockout mice identifies direct SREBP target genes [MG_U74Av2]
Project description:Introgressed variants from other species can be an important source of genetic variation because they may arise rapidly, can include multiple mutations on a single haplotype, and have often been pretested by selection in the species of origin. Although introgressed alleles are generally deleterious, several studies have reported introgression as the source of adaptive alleles-including the rodenticide-resistant variant of Vkorc1 that introgressed from Mus spretus into European populations of Mus musculus domesticus. Here, we conducted bidirectional genome scans to characterize introgressed regions into one wild population of M. spretus from Spain and three wild populations of M. m. domesticus from France, Germany, and Iran. Despite the fact that these species show considerable intrinsic postzygotic reproductive isolation, introgression was observed in all individuals, including in the M. musculus reference genome (GRCm38). Mus spretus individuals had a greater proportion of introgression compared with M. m. domesticus, and within M. m. domesticus, the proportion of introgression decreased with geographic distance from the area of sympatry. Introgression was observed on all autosomes for both species, but not on the X-chromosome in M. m. domesticus, consistent with known X-linked hybrid sterility and inviability genes that have been mapped to the M. spretus X-chromosome. Tract lengths were generally short with a few outliers of up to 2.7 Mb. Interestingly, the longest introgressed tracts were in olfactory receptor regions, and introgressed tracts were significantly enriched for olfactory receptor genes in both species, suggesting that introgression may be a source of functional novelty even between species with high barriers to gene flow.
Project description:During T cell development in the thymus, negative selection eliminates autoreactive and potentially harmful T cells, leading to central tolerance. This process, involves specific apoptosis programs thought to be governed by the transcription factor Nur77. To analyze the genetic pathways involved in thymic negative selection and to point to new genes involved in thymic selection, we performed a high throughput temporal expression profiling of thymocytes from HNT-TCR transgenic mice undergoing specific peptide-mediated thymic negative selection, using oligonucleotide microarrays. We used HNT-TCR transgenic mice that are on a B10D2 background and express a transgenic TCR (V beta 8), specific for the HA peptide (HNTNGVTAACSHE) presented by MHC class II I-A^d. In this model of thymic negative selection, a single injection of the specific HA peptide induces massive and synchronized deletion of thymocytes. In this study, we analyzed the dynamically regulated genes over a 24 hours period, with a focus on the early time points of 3 and 6 hours after peptide injection.