Description

The IMMP2L Knockout KGN Cell Line is a CRISPR/Cas9-edited knockout cell line derived from the human ovarian granulosa cell line KGN, designed for targeted gene disruption of IMMP2L. This loss-of-function model enables precise investigation of the mitochondrial inner membrane peptidase subunit IMMP2L in a well-characterized granulosa background, offering a robust tool for dissecting mitochondrial protein processing and quality control.

The host cell line KGN is an immortalized human granulosa line established from a granulosa cell tumor. It retains key steroidogenic capacity, making it a standard model for studying ovarian folliculogenesis, steroidogenesis, and tumorigenesis. KGN cells thus provide a physiologically relevant context for exploring mitochondrial functions in endocrine and oncological settings.

IMMP2L encodes a catalytic subunit of the mitochondrial inner membrane peptidase (IMP) complex that proteolytically processes nuclear-encoded mitochondrial precursor proteins after import. It forms complexes with IMMP1L and cooperates with the mitochondrial processing peptidase (MPP) and quality control proteases OMA1 and YME1L. Upstream, IMMP2L expression is regulated by PPARGC1A, NRF1, and TFAM under mitochondrial stress signals, while downstream it cleaves respiratory chain subunits such as UQCRFS1 and CYC1, as well as mitochondrial ribosomal components, thereby ensuring proper assembly of oxidative phosphorylation complexes.

In the context of KGN granulosa cells, IMMP2L knockout likely compromises mitochondrial protein maturation, impairing respiratory chain function and steroidogenic output. This disruption is significant for examining mitochondrial dysfunction in ovarian tumorigenesis and reproductive disorders. Furthermore, given the association of IMMP2L mutations with Tourette syndrome and autism spectrum disorder, this cell line also facilitates modeling of neurodevelopmental pathologies linked to impaired mitochondrial protein quality control.

Research applications include mitochondrial respiration assays using Seahorse analysis, flow cytometric measurement of membrane potential, Western blotting for IMMP2L and targets like UQCRFS1, RT-qPCR for mitochondrial gene expression, immunofluorescence for mitochondrial morphology, and proteinase K protection assays to evaluate import efficiency. This knockout line is invaluable for studies in reproductive cancer biology, mitochondrial quality control, and neurodevelopmental disease modeling. For further information, contact Ascent Research.