MCEE Knockout Raji Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed for loss-of-function studies of the MCEE gene. This product consists of a heterogeneous pool of Raji cells that have undergone CRISPR/Cas9-mediated gene disruption, generating a polyclonal knockout model. The polyclonal format retains cellular diversity and avoids clonal selection artifacts, making it suitable for experiments requiring a representative population of knockout cells.
The parental Raji cell line is an EBV-positive B lymphoblastoid line originally derived from a Burkitt lymphoma patient. Raji cells are widely used in immunology and cancer research due to their robust expression of B cell markers, active B cell receptor signaling, and ability to secrete antibodies. They provide a physiologically relevant context for studying adaptive immune responses and B cell malignancies, with established protocols for genetic manipulation and functional assays.
MCEE encodes methylmalonyl-CoA epimerase, a mitochondrial enzyme that catalyzes the racemization of (2R)-methylmalonyl-CoA to (2S)-methylmalonyl-CoA. This conversion is essential for propionyl-CoA metabolism, as it enables the subsequent isomerization of (2S)-methylmalonyl-CoA to succinyl-CoA by methylmalonyl-CoA mutase. Succinyl-CoA then enters the TCA cycle, linking amino acid catabolism to energy production. MCEE functions downstream of propionyl-CoA carboxylase and upstream of the TCA cycle, directly interacting with methylmalonyl-CoA mutase. The pathway involves metabolites propionyl-CoA, D-methylmalonyl-CoA, L-methylmalonyl-CoA, and succinyl-CoA, with flux regulated by substrate availability. Deficiencies in MCEE are associated with methylmalonic acidemia and methylmalonyl-CoA epimerase deficiency.
In Raji B cells, knockout of MCEE likely disrupts propionyl-CoA metabolism, potentially impairing succinyl-CoA supply and TCA cycle activity. This metabolic perturbation can influence ATP production, biosynthesis, and redox balance, thereby affecting B cell proliferation, antibody production, and survival under metabolic stress. Since B lymphocytes undergo metabolic reprogramming during activation and differentiation, the MCEE knockout model may reveal vulnerabilities in metabolic pathways that are critical for B cell function. The polyclonal nature of the product preserves the cellular heterogeneity, enabling studies of variable knockout efficiency and metabolic adaptation across the population.
This product is ideal for metabolic pathway analysis using labeled propionate flux assays, modeling methylmalonic acidemia to study disease mechanisms, and drug sensitivity screening to identify compounds that target metabolic dependencies. Researchers can confirm MCEE knockout via Western blotting or RT-qPCR, assess downstream effects through succinyl-CoA level measurements, and evaluate cellular responses under metabolic stress using viability assays. Additionally, the cells support TCA cycle flux analysis and investigations into B cell metabolism. For detailed protocols, technical support, or custom requests, please contact Ascent Research.
