Vector expressing both gRNA and mCherry (pCAGmCherry-gRNA) was generated as previously described30 (link). To construct gRNA expression vectors, each 20 bp target sequence was sub-cloned into pCAGmCherry-gRNA or gRNA_Cloning Vector (Addgene 41824). The CRISPR/Cas9 target sequences (20 bp target and 3 bp PAM sequence (underlined)) used in this study include: scramble, GCTTAGTTACGCGTGGACGAAGG ; mutant GFP, CAGG GTAATCTCGAGAGCTTAGG ; MH1, GCCGCTTTACTTAGGTCCCCGGG ; and MH2, GGAGATCCACTCTCGAGCCCGGG ; for PITCh donor: mouse Tubb3, AGCTGCGAGCAACTTCACTTGGG ; human TUBB3, AGCTGCGAGCAGCTT CACTTGGG ; human KCNQ1, AGTACGTGGGCCTCTGGGGGCGG ; the downstream of CAG promoter in Ai14 mouse, TAGGAACTTCTTAGGGCCCGCGG ; rat Mertk for HITI, GAGGACCACTGCAACGGGGCTGG ; rat Mertk for HDR, TCAGGTGCTTAGGCATTTCGTGG . The Scramble-gRNA target sequence we designed is an artificial sequence that does not exist in human, mouse and rat genomes. We used the off-target finder software Cas-OFFinder (http://www.rgenome.net/cas-offinder/ ) to confirm that there were no genomic target sites within 2-bp mismatches. We have confirmed that the Scramble-gRNA can cut its target site in the donor vector (Extended Data Fig. 1b ). pMDLg/pRRE, pRSV-Rev and pMD2.G (Addgene 12251, 12253 and 12259) were used for packaging lentiviruses. pEGIP*35 and tGFP (Addgene 26776 and 26864) were used for examining HDR and HITI efficiencies. To construct IRESmCherry-0c, IRESmCherry-1c, IRESmCherry-2c, IRESmCherry-MH, IRESmCherry-HDR-0c and IRESmCherry-HDR-2c, IRES and mCherry sequences were amplified with Cas9 target sequence by PCR from pEGIP*35 and pCAGmCherry-gRNA, respectively and co-integrated into pCR-bluntII vector (Invitrogen) with zero, one or two CAS9/gRNA target sequences. Cas9 expression plasmid (hCas9) was purchased from Addgene (41815). To generate different NLS-dCas9 constructs, pMSCV-LTR-dCas9-VP64-BFP (Addgene 46912) was used to amplify dCas9, which was subsequently subcloned into pCAG-containing plasmid with different NLS and 3 × Flag tag. To construct pCAG-Cas9 (no NLS), pCAG-1NLS-Cas9-1NLS and pCAG-1BPNLS-Cas9-1BPNLS, D10A and H840A mutations of dCas9 plasmids were exchanged to wild-type sequence by In-Fusion HD Cloning kit (Clontech). Then, pCAG-Cas9-2AGFP (no NLS), pCAG-1NLS-Cas9-1NLS-2AGFP and pCAG-1BPNLS-Cas9-1BPNLS-2AGFP were constructed by adding 2AGFP downstream of Cas9. To construct pCAG-floxSTOP-1BPNLS-Cas9-1BPNLS, 1BPNLS-Cas9-1BPNLS was amplified by PCR and exchanged with GFP of pCAG-floxSTOP-EGFP-N1 vector31 (link). To construct HITI donor plasmids for mouse and human Tubb3 gene (Tubb3-1c, Tubb3-2c, Tubb3-2cd, hTUBB3-1c and hTUBB3-2c) and PITCh donor (Tubb3-MH), GFP was subcloned into pCAG-floxSTOP plasmid with one or two CAS9/gRNA target sequences. To construct HDR donor for mouse Tubb3 gene (Tubb3-HR), GFP, 5′ and 3′ homology arms were amplified from pCAG-GFP-N1 or mouse genome, then subcloned into pCAG-floxSTOP plasmid. pCAG-ERT2-Cre-ERT2 was purchased from Addgene (13777). PX551 and PX552 were purchased from Addgene (60957 and 60958). To construct AAV-Cas9, nEF (hybrid EF1 α/HTLV) promoter (Invivogen) was exchanged with Mecp2 promoter of PX551. To construct donor/gRNA AAVs for HITI, donor DNA sandwiched by Cas9/gRNA target sequence, gRNA expression cassette and GFPKASH (or mCherryKASH) expression cassettes were subcloned between ITRs of PX552, and generated pAAV-mTubb3, pAAV-Ai14-HITI, pAAV-Ai14-luc, pAAV-Ai14-scramble and pAAV-rMertk-HITI. For pAAV-rMertk-HITI, exon 2 of rat Mertk gene including the surrounding intron is sandwiched by Cas9/gRNA target sequence, which is expected to integrate within intron 1 of Mertk by HITI. For HDR AAV (pAAV-Ai14-HDR and pAAV-rMertk-HDR), the homology arms were amplified by PCR from mouse and rat genome DNA, and subcloned into AAV backbone plasmid. The plasmids described in this manuscript will be available to academic researchers through Addgene.
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TUBB3 protein, human
TUBB3 protein, human
TUBB3 is a member of the beta-tubulin protein family and plays a critical role in the formation and function of microtubules, which are essential structural components of the cytoskeleton.
This protein is involved in various cellular processes, including cell division, intracellular transport, and neuronal development.
Mutations in the TUBB3 gene have been linked to several neurological disorders, such as congenital fibrosis of the extraocular muscles and other developmental brain abnormalities.
Researchers studying the TUBB3 protien can optimize their work using PubCompare.ai, an AI-driven platform that enhances reproducibility and accuracy by providing access to protocols from literature, pre-prints, and patents, and using AI-driven comparisons to identify the best protocols and products.
This streamines the research process and helps researchers obtain accurate results for their TUBB3 protien studies.
This protein is involved in various cellular processes, including cell division, intracellular transport, and neuronal development.
Mutations in the TUBB3 gene have been linked to several neurological disorders, such as congenital fibrosis of the extraocular muscles and other developmental brain abnormalities.
Researchers studying the TUBB3 protien can optimize their work using PubCompare.ai, an AI-driven platform that enhances reproducibility and accuracy by providing access to protocols from literature, pre-prints, and patents, and using AI-driven comparisons to identify the best protocols and products.
This streamines the research process and helps researchers obtain accurate results for their TUBB3 protien studies.
Most cited protocols related to «TUBB3 protein, human»
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Exons
Genes
Genome
Homo sapiens
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Internal Ribosome Entry Sites
Introns
Lentivirus
MECP2 protein, human
Mice, Laboratory
mitogen-activated protein kinase 3, human
Mutation
NO-BP
Plasmids
T-Cell Leukemia Viruses, Human
Tissue Donors
TUBB3 protein, human
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Anabolism
Animals
Deoxyribonuclease I
DNA, Complementary
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Gene Expression
Genes
Genes, Housekeeping
Genetic Selection
Injuries
neuro-oncological ventral antigen 2, human
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Real-Time Polymerase Chain Reaction
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trizol
TUBB3 protein, human
All analysis reported in this paper made use of the Seurat package developed by the Satija lab [13 (link), 20 (link)]. In essence, we used the methods that they recommend in their tutorial for analyzing a dataset of 2,700 peripheral blood mononuclear cells for identification and display of clustering. Briefly, data were log normalized and center scaled; variable markers were identified and used for linear dimensional reduction (principle component analysis, PCA). Informative principle components were identified by plotting their standard deviations using the PCElbowPlot function of the Seurat package as described in the Satija lab tutorial. These principle components were used for clustering of STAMPS using a smart local moving algorithm [21 ]; multidimensional data were displayed using a tSNE 2-dimensional representation. A first round of clustering was performed using all the STAMPs that contained at least 1,000 transcripts; libraries containing less than 200 or more than 8,500 different genes and STAMPs containing more than 0.3% mitochondrial transcripts were excluded from analysis leaving 6998 single cell libraries. Clusters of STAMPs from somatosensory neurons were identified by their expression of known marker genes including Scn9a, Tubb3 and Snap25 as well as more specific transcripts like Trpv1, Trpm8 and Piezo2 and lack of expression of markers for other cells including Plp1, Mbp and Epcam. Somatosensory neurons were re-clustered using more stringent criteria for inclusion: 500–7,500 genes, 0.2% mitochondrial transcripts; genes expressed in less than 6 neurons were also excluded leaving a dataset of 3580 neurons and more than 15,000 genes.
We examined the stability of the clustering reported here using a variety of conditions and by using different clustering methods including tSNE based clustering [10 (link)]. Random selection of STAMPs demonstrated that the number of clusters (and their markers) was not changed once 1,500 to 2,000 neurons were included in the analysis thus increasing sample size incrementally beyond 3,500 neurons would be unlikely to change our conclusions. Similarly, clusters were not changed when different criteria were used for selection of variable genes or when the number of principle components used for analysis was varied between 15 and 25. tSNE based clustering [10 (link)] also yielded very similar results. More stringent selection of cells by requiring 900–7,500 different genes to be present in a STAMP, selectively reduced the number of S100b expressing neurons and resulted in collapse of this group of three clusters into a single cluster. In contrast, eliminating genes expressed in limited numbers of cells had little effect on clustering. For example, C11 and C12 each consist of less than 100 STAMPs; nonetheless these clusters were still separated when all genes present in less than 120 cells were excluded from the analysis. Indeed, very similar clustering was still observed even when genes expressed in less than 500 cells were eliminated (e.g. including genes like Trpm8) with concomitant reduction of the number of genes used from more than 15,000 to less than 6,000. In this analysis, itch clusters C11 and C12 merged, C7 cells were incorporated in other clusters and the Ntrk2 rich cluster C5 merged with C4. Thus the clusters that we identified appear extremely stable and are not simply determined by expression of marker genes that are expressed in that class of cells or by the clustering parameters chosen and methods that were used.
We examined the stability of the clustering reported here using a variety of conditions and by using different clustering methods including tSNE based clustering [10 (link)]. Random selection of STAMPs demonstrated that the number of clusters (and their markers) was not changed once 1,500 to 2,000 neurons were included in the analysis thus increasing sample size incrementally beyond 3,500 neurons would be unlikely to change our conclusions. Similarly, clusters were not changed when different criteria were used for selection of variable genes or when the number of principle components used for analysis was varied between 15 and 25. tSNE based clustering [10 (link)] also yielded very similar results. More stringent selection of cells by requiring 900–7,500 different genes to be present in a STAMP, selectively reduced the number of S100b expressing neurons and resulted in collapse of this group of three clusters into a single cluster. In contrast, eliminating genes expressed in limited numbers of cells had little effect on clustering. For example, C11 and C12 each consist of less than 100 STAMPs; nonetheless these clusters were still separated when all genes present in less than 120 cells were excluded from the analysis. Indeed, very similar clustering was still observed even when genes expressed in less than 500 cells were eliminated (e.g. including genes like Trpm8) with concomitant reduction of the number of genes used from more than 15,000 to less than 6,000. In this analysis, itch clusters C11 and C12 merged, C7 cells were incorporated in other clusters and the Ntrk2 rich cluster C5 merged with C4. Thus the clusters that we identified appear extremely stable and are not simply determined by expression of marker genes that are expressed in that class of cells or by the clustering parameters chosen and methods that were used.
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Cells
Gene Expression
Genes
Mitochondrial Inheritance
Neurons
PBMC Peripheral Blood Mononuclear Cells
Pruritus
Shock
SNAP25 protein, human
TACSTD1 protein, human
tropomyosin-related kinase-B, human
TUBB3 protein, human
Cells
Females
Gene Expression
Genes
Germ Cells
glutamate decarboxylase 1 (brain, 67kDa), human
HCRT protein, human
Males
Mitochondrial Inheritance
Neurons
Python
RNA, Messenger
TUBB3 protein, human
Luciferase assays were done essentially as described, using an inducible luciferase target (25 (link)), except that the medium was changed to fresh MEMα medium with 1 µM 4-OH-tamoxifen (Sigma) 24 h after transfection, and cells were lysed 45–48 h after transfection. The DNA amounts per one well of a 12-well plate were as follows: UAS-luc, UAS-luc-miR-155as, UAS-luc-ND1-3′-UTR or UAS-luc-Tubb3-3′-UTR, 80 ng; CS2+cβgal, 50 ng; CS2+G4D-ER™-G4A, 100 ng; CS2+SIBR, US2-SIBR, UI2-SIBR or UI4-SIBR expression vectors, 400 ng. For the experiments in Figures 7 and 9, the expression vectors were 100, 200 or 400 ng, with US2-MT added to maintain a constant DNA amount per well (other plasmid amounts as above). Reporter activity was assayed by using the Dual-Light system (Applied Biosystems) and was normalized to β-galactosidase activity to control for transfection efficiency variation among different wells. All reporter assays shown are based on data averaged from at least three independent transfections.
beta-Galactosidase
Biological Assay
Cells
Cloning Vectors
DNA, A-Form
Light
Luciferases
Plasmids
Tamoxifen
Transfection
TUBB3 protein, human
Most recents protocols related to «TUBB3 protein, human»
The pancreas was microdissected from control-Ai14 and Isl1CKO-Ai14 mice (postnatal day P0). We used an advanced CUBIC protocol [65 (link)] for tissue clearing to enable efficient imaging by light-sheet microscopy. Briefly, the microdissected tissue was fixed in 4% PFA for 1 h, washed with PBS, and incubated in a clearing solution Cubic 1 for 5 days at 37 ℃. Before immunolabeling, samples were washed in PBT (0.5% Triton-X in PBS) 4 × for 30 min. In addition to tdTomato expression, cleared samples were immunolabeled using different combinations of antibodies (anti-INS, anti-GLP1, and anti-TUBB3). Samples were stored before imaging in Cubic 2 at room temperature. Zeiss Lightsheet Z.1 microscope with illumination objective Lightsheet Z.1 5x/0.1 and detection objective Dry objective Lightsheet Z.1 5x/0.16 was used for imaging at the Light Microscopy Core Facility of the Institute of Molecular Genetics of the Czech Academy of Sciences. IMARIS software v8.1.1 (Bitplane AG, CA, USA) was used for image processing.
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Antibodies
Cuboid Bone
EHMT1 protein, human
Light Microscopy
Mus
Pancreas
tdTomato
Tissues
TUBB3 protein, human
Mice were first deeply anesthetized with a combination of ketamine (100 mg/kg) and xylazine (10 mg/kg), then transcardially perfused with PBS, followed by ice-cold 4% paraformaldehyde (PFA). After removing the cerebral cortex, the brainstem was left in the skull and postfixed in the same fixative overnight at 4°C. Parasagittal or coronal sections, 40–50 μm thick, of the CN were cut with a vibratome (Leica 1000S).
Free floating sections were collected, permeabilized, blocked with 3% BSA, and incubated with primary anti-GFP antibody (rabbit, Abcam catalog #ab290, 1:500) overnight on a shaker at 4°C to preserve the fluorescent signal of CeFP of the hVOS probe in TRAP-labeled neurons. In some experiments, sections were double stained with anti-tubulin β-III antibody (TUBB3, mouse, BioLegend catalog #801202, 1:500), as a neuronal marker. Sections were then incubated with fluorescent-dye conjugated secondary antibodies for 2 h (Alexa 568 anti-rabbit, Abcam catalog #ab175692, 1:500; Alexa 488 anti-mouse, 1:500, ThermoFisher Scientific catalog #A21202) and counterstained with DAPI for 10 min at room temperature. Images were acquired with a confocal microscope (Nikon A1RS) and processed with ImageJ.
Free floating sections were collected, permeabilized, blocked with 3% BSA, and incubated with primary anti-GFP antibody (rabbit, Abcam catalog #ab290, 1:500) overnight on a shaker at 4°C to preserve the fluorescent signal of CeFP of the hVOS probe in TRAP-labeled neurons. In some experiments, sections were double stained with anti-tubulin β-III antibody (TUBB3, mouse, BioLegend catalog #801202, 1:500), as a neuronal marker. Sections were then incubated with fluorescent-dye conjugated secondary antibodies for 2 h (Alexa 568 anti-rabbit, Abcam catalog #ab175692, 1:500; Alexa 488 anti-mouse, 1:500, ThermoFisher Scientific catalog #A21202) and counterstained with DAPI for 10 min at room temperature. Images were acquired with a confocal microscope (Nikon A1RS) and processed with ImageJ.
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alexa 568
anti-H-2 antibodies
Antibodies, Anti-Idiotypic
Brain Stem
Cold Temperature
Cortex, Cerebral
Cranium
DAPI
Fixatives
Fluorescent Dyes
Fluorescent Probes
Ketamine
Mice, House
Microscopy, Confocal
Neurons
paraform
Rabbits
TUBB3 protein, human
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Xylazine
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alexa fluor 488
Alexa Fluor 555
Hybridomas
Neural Cell Adhesion Molecules
SOX10 Transcription Factor
TCL1B protein, human
TUBB3 protein, human
Cell Ranger h5 files were read into Seurat v4 98 (link) in R (version 4.1.0) and RStudio (version 1.4.1717) and merged by brain region (DMH, SCN) for clustering analysis. We filtered the initial datasets to remove low quality samples (i.e., cells with less than 100 genes detected or greater than 0.5% mitochondrial reads). We then log-normalized the data; selected 2,000 most variable genes (“feature selection”), and scaled gene expression. We performed Principal Component Analysis (PCA) to linearly reduce the dimensionality of the highly variable gene set. We defined distance metrics based on K-nearest neighbor analysis, grouped cells with Louvian algorithm modality optimization, and visualized cell embeddings in low-dimensional space with Uniform Manifold Approximation and Projection (UMAP) nonlinear dimensionality reduction. To focus our analysis on neurons, we subsetted neuronal clusters based on their enriched expression of neuronal marker genes (Syt1, Syn1, Tubb3). To correct for batch effects, we integrated across sample batches using Seurat’s function for reciprocal principal component analysis (RPCA). Next, we subsetted region-specific clusters based on expression of positive and negative marker genes for each target brain region (SCN, DMH), as described in the next section. We reclustered the identified DMH and SCN neurons using the following parameters: DMH, 2,000 most variable genes, first 15 PCs, resolution setting of 0.8; SCN, 2,000 most variable genes, first 13 PCs, resolution setting of 0.5 Finally, we assessed cluster markers with the Wilcoxon Rank Sum test using Seurat default settings. Cluster markers were selected based on top p-values (adjusted to correct for multiple comparisons), high percent expression within the cluster and low percent expression outside of the cluster, and validated based on Allen Brain Atlas mouse in situ hybridization data and previous literature.
Brain
Cells
Gene Expression
Genes
Genetic Markers
In Situ Hybridization
Mice, Laboratory
Mitochondrial Inheritance
Neurons
Suprachiasmatic Nucleus Neurons
SYT1 protein, human
TCL1B protein, human
TUBB3 protein, human
After 5 days of maturation, neurons were fixed in 4% PFA and ICC was performed with Beta-III-Tubulin (Tuj1, Millipore, MAB1637). Neurite length was measured and analyzed using Neurite Tracer in Fiji ImageJ (Pool et al., 2008 (link)), from three independent experiments.
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Neurites
Neurons
TUBB3 protein, human
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DAPI is a fluorescent dye that binds strongly to adenine-thymine (A-T) rich regions in DNA. It is commonly used as a nuclear counterstain in fluorescence microscopy to visualize and locate cell nuclei.
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TUBB3 is a protein that functions as a component of microtubules, which are cytoskeletal structures involved in various cellular processes. It is commonly used as a marker for neuronal cells and their differentiation.
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Ab18207 is a primary antibody that recognizes the CD68 antigen. CD68 is a glycoprotein that is highly expressed by monocytes and macrophages, making it a useful marker for these cell types.
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