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Human OXGR1/Galpha15 Stable Cell Line-Chem-1

Cat.No.: CSC-RG0612
Cell Line Description: This human GPR99-expressing cell line is made in the Chem-1 host, which supports high levels of recombinant GPR99 expression on the cell surface and contains high levels of the promiscuous G protein Galpha15 to enhance coupling of the receptor to the calcium signaling pathway. Thus, the cell line is an ideal tool for screening for antagonists of interactions between GPR99 and its ligands.
Background: GPR99 (also known as GPR80) was originally identified as an orphan with a sequence most closely related to P2Y receptors. Studies to deorphanize GPR99 revealed that alpha-ketoglutarate activates GPR99 through Gq to increase intracellular calcium. The EC50 of GPR99 for alpha-ketoglutarate is in the μM range, similar to the concentration of alpha-ketoglutarate in the circulation, indicating that the interaction is physiologically significant.
Growth Properties: Adherent
Host Cell: Chem-1
Cell Line Validation: 1. Gene expression: qPCR experiments determined specific silencing of OXGR1.2. Protein expression: OXGR1 in this cell line has been validated by immunocytochemical staining.3. EC50 for calcium mobilization by alpha-ketoglutarate: ~ 260 μM.
Application: Calcium flux assays, ligand binding assays
Sub-type: GPR
Propagation: Complete growth medium: DMEM with 4.5 g/L glucose + 4mM glutamine + 10% heat-inactivated FBS + 1x Nonessential amino acids + 10mM HEPES + 1x Pen-Strep + 250μg/mL Genetecin/G-418 Plating medium: DMEM with 4.5 g/L glucose + 4mM glutamine + 10% heat-inactivated FBS + 1x NEAA + 10mM HEPES + 1x Pen-StrepAtmosphere: air, 95%; carbon dioxide (CO2), 5%Temperature: 37 °C
Starting Cells From Frozen Cell Stock: 1. Immediately upon receipt, thaw cells or place cells in liquid nitrogen. Maintain frozen in liquid nitrogen for up to 5 years. 2. Thaw cells rapidly by removing from liquid nitrogen and immediately immersing in a 37°C water bath. Immediately after ice has thawed, sterilize the exterior of the vial with 70% ethanol. Transfer contents of the vial to a T75 flask containing growth media. Place the flask in a humidified incubator at 37°C with 5% CO2. 3. After 8-24 h, all live cells will be attached. Viability of the cells is expected to be 50-80%. At this time, replace media to remove residual DMSO, and return to incubator.
Subculturing: 1. When cells are approximately 80% confluent, passage the cells as follows: Remove media and wash once with HBSS without Ca2+ and Mg2+ (10 mL/T75). Add 0.05% trypsin/0.2 g/L EDTA (1 mL/T75) and place in humidified incubator at 37°C with 5% CO2 until cells begin to round up and detach (5-10 minutes). Gently rap the side of the flask to dislodge the cells. Neutralize trypsin by addition of 4 mL Growth Media per 1 mL trypsin. 2. Cells are typically passaged 1:10 every 3-4 days. Passaging ratio may be varied according to requirements of the investigator.
Mycoplasma: Mycoplasma Status: Negative (MycoAlert Kit)
Freeze Medium: Freezing medium: DMEM with 4.5 g/L glucose + 4mM glutamine + 20% heat-inactivated FBS + 1x NEAA + 10mM HEPES + 1x Pen-Strep + 10% DMSO
Storage: Liquid nitrogen
Preservation: 1. Frozen stocks of cells should be prepared at the earliest passage possible after thawing, as follows: Count detached cells (prepared as in Subculture-Step 1). Centrifuge cells at 200 x g for 5 min. Resuspend cells at 5 x 10^6 cells/mL in Freezing Media (cell densities of 2-10 x 10^6 are also acceptable if necessary). Dispense 1 mL aliquots into cryopreservation vials. Freeze the cells by a controlled rate process, such as in an isopropanol-jacketed container placed at –70°C overnight. Store the vials in liquid nitrogen. 2. Use of cells immediately after thawing is feasible for some cell lines and is being further validated. Some cell lines may need to be passaged at least once after thawing prior to use in calcium flux assays. Cells should be resuspended in Plating Media for plating for calcium assay.
Safety Considerations: The following safety precautions should be observed.1. Use pipette aids to prevent ingestion and keep aerosols down to a minimum.2. No eating, drinking or smoking while handling the stable line.3. Wash hands after handling the stable line and before leaving the lab.4. Decontaminate work surface with disinfectant or 70% ethanol before and after working with stable cells.5. All waste should be considered hazardous.6. Dispose of all liquid waste after each experiment and treat with bleach.
Ship: Dry ice
Gene Name: OXGR1 oxoglutarate (alpha-ketoglutarate) receptor 1 [ Homo sapiens ]
Official Symbol: OXGR1
Synonyms: OXGR1; oxoglutarate (alpha-ketoglutarate) receptor 1; G protein coupled receptor 80 , GPR80, GPR99; 2-oxoglutarate receptor 1; P2RY15; P2Y15; P2Y-like GPCR; P2Y purinoceptor 15; oxoglutarate receptor 1; P2Y-like nucleotide receptor; G protein-coupled receptor 80; G protein-coupled receptor 99; G-protein coupled receptor 80; G-protein coupled receptor 99; alpha-ketoglutarate receptor 1; seven transmembrane helix receptor; GPR80; GPR99; MGC119206; MGC119207; MGC119208;
Gene ID: 27199
mRNA Refseq: NM_080818
Protein Refseq: NP_543008
MIM: 606922
UniProt ID: Q96P68
Chromosome Location: 13q32.2
Function: G-protein coupled purinergic nucleotide receptor activity; G-protein coupled receptor activity; receptor activity; signal transducer activity;

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