The DTNBP1 Knockout HEK293T Polyclonal Cells represent a CRISPR/Cas9-mediated gene-disrupted polyclonal population in the HEK293T human embryonic kidney epithelial cell line. This product provides a pooled knockout model targeting the DTNBP1 gene, which encodes the dysbindin protein, a core component of the Biogenesis of Lysosome-Related Organelles Complex 1 (BLOC-1). The polyclonal nature ensures a heterogeneous mixture of edited cells, suitable for experiments where clonal variation is not required. Loss of dysbindin function in these cells enables investigation of BLOC-1-dependent trafficking pathways and their downstream consequences in a highly transfectable host background.
HEK293T cells are derived from human embryonic kidney, transformed with the SV40 large T antigen, and exhibit an adherent, fibroblast-like morphology. They are widely employed for transient and stable transfection, protein expression, and biochemical assays due to their high transfection efficiency and robust growth characteristics. The cell line??s epithelial origin and well-characterized signaling networks make it a versatile platform for studying protein?Cprotein interactions, post-translational modifications, and organellar dynamics. In the context of DTNBP1 disruption, HEK293T cells provide a clean, non-neuronal background to dissect the fundamental cell biology of BLOC-1 components without confounding neuronal-specific factors.
Dysbindin, the DTNBP1 protein product, is a subunit of the BLOC-1 complex that also includes BLOC1S1, BLOC1S2, pallidin, muted, cappuccino, and snapin. This complex orchestrates the biogenesis and trafficking of lysosome-related organelles by regulating cargo sorting from early endosomes. Dysbindin directly interacts with dystrobrevin and myosin Va, and its function is regulated by upstream signals including BDNF, neuregulin-1, and AKT. Downstream targets encompass synaptic proteins such as SNAP-25, VAMP2, syntaxin 1A, and glutamate receptor subunits of the NMDA and AMPA types. Disruption of DTNBP1 thus impairs BLOC-1?Cmediated vesicle transport, altering neurotransmitter release machinery and synaptic plasticity, and has been strongly associated with schizophrenia susceptibility and other neuropsychiatric disorders.
Although HEK293T cells are not of neural lineage, they retain fundamental membrane trafficking and protein interaction pathways that allow rigorous dissection of dysbindin??s molecular roles. This knockout model facilitates the study of BLOC-1 assembly, dysbindin??s binding partners, and the trafficking of lysosomal markers such as LAMP1/2 in a facile experimental system. Researchers can reintroduce wild-type or mutant dysbindin to perform rescue experiments and map functional domains, or co-express interacting components to reconstitute partial BLOC-1 complexes. The absence of endogenous dysbindin simplifies interpretation of biochemical and imaging data, making these polyclonal cells a valuable tool for mechanistic studies.
Key applications include neuropsychiatric disease modeling, lysosomal storage disorder investigation, and synaptic plasticity studies in a tractable host. Drug screening for schizophrenia-related phenotypes, Western blotting for dysbindin and BLOC-1 subunits, immunofluorescence for organelle markers, synaptosome fractionation, neurotransmitter release assays, and electrophysiology on co-cultured neurons can all leverage this knockout population. Co-immunoprecipitation of BLOC-1 components enables mapping of protein interaction networks. For technical inquiries, please contact Ascent Research.
