The LACTB2 Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the A-549 human lung adenocarcinoma epithelial cell line. CRISPR/Cas9-mediated gene disruption targets the LACTB2 locus, creating a heterogeneous pool of cells with loss-of-function mutations. This product provides a versatile loss-of-function model for studying mitochondrial RNA metabolism in a lung cancer context.
A-549 cells are a well-characterized model of human lung adenocarcinoma, widely used to investigate cancer biology, drug responses, and respiratory epithelial function. Their epithelial origin and retention of key alveolar type II characteristics make them a relevant host for studying mitochondrial processes in cancerous epithelial cells.
LACTB2 encodes a mitochondrially localized endoribonuclease that cleaves primary mitochondrial RNA transcripts, a critical step in mitochondrial RNA processing and ribosome biogenesis. The enzyme acts downstream of mitochondrial stress signals and the transcriptional coactivator PGC-1??, and directly interacts with the RNA processing machinery including PNPT1 and mitochondrial ribosome subunits. Its activity is essential for the maturation of mitochondrial mRNAs and the assembly of the mitoribosomal large subunit, thus controlling the expression of mitochondrial-encoded subunits like MT-CO1 and MT-ND1. The broader pathway involves mitochondrial RNA polymerase, RNase P, and the MRPP1/2 complex, which together orchestrate mitochondrial gene expression. Disruption of LACTB2 therefore impairs mitochondrial protein synthesis and oxidative phosphorylation.
In the context of A-549 lung adenocarcinoma cells, LACTB2 knockout enables the dissection of how mitochondrial RNA metabolism defects influence cancer cell biology. Lung tumors frequently exhibit altered mitochondrial function, and this model allows investigation of the interplay between respiratory chain integrity, cell viability, and tumorigenic properties. Researchers can assess how loss of mitochondrial gene expression impacts metabolic plasticity, proliferation, and survival under therapeutic stressors.
This knockout model supports diverse experimental applications, including functional analysis of mitochondrial RNA processing, modeling mitochondrial dysfunction in cancer, and screening for synthetic lethal interactions. Compatible assays include Seahorse mitochondrial stress tests, RT-qPCR profiling of mitochondrial transcripts, western blotting for oxidative phosphorylation complexes, and RNA-seq to evaluate processing efficiency. Cell viability assays under mitochondrial inhibitors or hypoxia can uncover metabolic dependencies. These cells are thus a valuable tool for research into mitochondrial disorders, neurodevelopmental conditions, and cancer metabolism. For technical inquiries or custom requests, please contact Ascent Research.
