Description

The GGN Knockout HEK293T Cell Line is a CRISPR/Cas9-edited knockout cell line designed for loss-of-function studies of the gametogenetin-encoding GGN gene. This model enables examination of the molecular consequences of gametogenetin ablation in a controlled in vitro setting. As a stable knockout, it eliminates the need for transient suppression methods and ensures reproducible interrogation of GGN-dependent cellular processes, particularly ubiquitin-mediated proteolysis and protein interaction networks.

HEK293T cells are a highly transfectable derivative of human embryonic kidney HEK293 cells, constitutively expressing the SV40 large T antigen. This feature enhances plasmid replication, yielding exceptional transfection efficiency and robust recombinant protein expression. Widely used for protein production, viral packaging, and functional genomics, HEK293T cells provide a well-characterized host for gene-editing applications. Their rapid growth facilitates high-throughput biochemical assays.

GGN encodes gametogenetin, a testis-specific protein critical for spermatogenesis and germ cell development. Its expression is regulated by upstream transcription factors CREM and DMRT1, and by androgen receptor and FSH signaling. At the protein level, gametogenetin physically interacts with the E3 ubiquitin ligase RNF216, which catalyzes its ubiquitination and targets it for degradation by the 26S proteasome. This places gametogenetin within the RNF216?Cubiquitin conjugating enzyme?Cproteasome axis, a system essential for protein quality control during germ cell maturation. Disruption of GGN thus removes a key node, enabling dissection of gametogenetin’s role in ubiquitin-dependent turnover.

Although gametogenetin is not natively expressed in HEK293T cells, this host provides distinct experimental advantages for GGN knockout studies. The lack of endogenous gametogenetin creates a blank background ideal for reconstitution experiments with wild-type or mutant GGN constructs to map functional domains and assess protein stability. High transfection efficiency allows co-expression of RNF216 or ubiquitin mutants, facilitating study of gametogenetin’s interplay with the ubiquitin-proteasome system. This model thus serves as a versatile platform for investigating protein degradation mechanisms relevant to reproductive biology.

Researchers can use this knockout cell line for applications such as western blotting and RT-qPCR to assess gene and protein expression, co-immunoprecipitation to verify protein interactions, and immunofluorescence for localization studies. Ubiquitination assays and proteasome inhibition experiments directly probe gametogenetin turnover. These tools support research into male infertility, spermatogenic failure, and azoospermia, and enable drug screening for modulators of the ubiquitin-proteasome pathway with fertility applications. For additional information or technical support, please contact Ascent Research.