The BMPR1B Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population enabling loss-of-function studies of the BMPR1B gene. This heterogeneous pool of HEK293T cells with targeted BMPR1B disruption provides a versatile model for investigating BMPR1B-dependent signaling in a human cellular context.
The HEK293T host cell line is a human embryonic kidney epithelial derivative of HEK293 that stably expresses the SV40 large T antigen. Renowned for high transfection efficiency and robust recombinant protein expression, these adherent cells are a preferred system for signal transduction research, viral vector production, and genetic manipulation.
BMPR1B encodes a type I receptor serine/threonine kinase that transduces signals from bone morphogenetic proteins (BMPs). Upon binding of ligands including BMP2, BMP4, BMP7, and GDF5, BMPR1B forms a heteromeric complex with type II receptors (BMPR2, ACVR2A) and phosphorylates SMAD1, SMAD5, and SMAD8. These activated SMADs partner with SMAD4 and enter the nucleus to regulate transcription of target genes such as the inhibitors of differentiation (ID1, ID2, ID3), the osteogenic transcription factor RUNX2, and chondrogenic regulators SOX9 and DLX5. BMPR1B can also activate non-canonical MAPK cascades. Receptor function is modulated by interacting proteins including FKBP12 and caveolin-1.
In HEK293T cells, BMPR1B knockout eliminates endogenous receptor expression, generating a defined background for studying BMP pathway wiring and ligand-specific responses. The cell line’s high transfection efficiency facilitates reconstitution experiments with wild-type or mutant BMPR1B, enabling dissection of disease-associated variants and receptor cross-talk. This model is particularly suited for analyzing the balance between SMAD-dependent and MAPK signaling downstream of BMPR1B.
Broad research applications include functional dissection of BMP signaling cascades, mechanistic studies of skeletal development and chondrogenesis, and the role of BMPR1B in osteosarcoma. Complementary assays encompass Western blot analysis of phospho-SMAD1/5/8, RT-qPCR for ID1/2/3 expression, immunofluorescence for SMAD nuclear translocation, alkaline phosphatase activity measurement, and BRE-luciferase reporter assays. The cells also support cell proliferation, apoptosis, and migration/invasion studies, as well as high-throughput drug screening targeting the BMP pathway. For further information, please contact Ascent Research.
