DRD5 Knockout HAP1 Polyclonal Cells constitute a polyclonal knockout cell population generated through CRISPR/Cas9-mediated disruption of the DRD5 gene in the HAP1 human cell line. This loss-of-function model enables investigation of dopamine receptor D5 signaling in a near-haploid genetic background, facilitating functional genomics and drug discovery applications.
HAP1 is a near-haploid fibroblast-like cell line originally derived from a male chronic myeloid leukemia patient. Its haploid karyotype simplifies genetic manipulation and phenotypic analysis, making it particularly well-suited for genetic screens, knockout studies, and mapping of signaling pathways. The polyclonal nature of this product reflects a heterogeneous population of edited cells, preserving functional diversity for robust experimental outcomes.
DRD5 encodes the dopamine receptor D5, a G-protein coupled receptor that primarily couples to G??s to stimulate adenylyl cyclase (ADCY5) activity, leading to increased intracellular cAMP levels and subsequent activation of protein kinase A (PRKACA). This cascade promotes phosphorylation of CREB1 and transcriptional regulation of cAMP-responsive genes. DRD5 is activated by dopamine and synthetic agonists such as SKF-38393, and its signaling is modulated by G-protein-coupled receptor kinases (GRKs) and ??-arrestins, which mediate receptor desensitization and internalization. Key pathway components include GNAS, ADCY5, PRKACA, and CREB1, forming a canonical Gs?CcAMP?CPKA?CCREB axis.
Disruption of DRD5 in HAP1 cells abolishes dopamine-mediated Gs-coupled signaling, leading to loss of adenylyl cyclase activation and downstream cAMP/PKA/CREB pathway activity. This knockout model provides a powerful tool for dissecting the molecular mechanisms underlying dopaminergic neurotransmission and its dysregulation in neuropsychiatric disorders such as schizophrenia, Parkinson??s disease, attention deficit hyperactivity disorder, and substance use disorders. The haploid background enables straightforward interpretation of gene function without allelic complexity.
Researchers can employ these polyclonal knockout cells for a range of applications, including functional dissection of dopaminergic signaling, high-throughput drug screening for D5 receptor modulators, genetic interaction mapping, and mechanistic studies of neuropsychiatric disease pathways. Representative assays include cAMP accumulation measurements, Western blot analysis of phospho-CREB, RT-qPCR quantification of cAMP-responsive genes, ??-arrestin recruitment assays, and drug sensitivity testing with dopamine agonists or antagonists. For further technical information and ordering, please contact Ascent Research.
