BCL-3 does not mediate β-catenin activity through promoting nuclear translocation or altering levels of LEF1. BCL-3 does not mediate β-catenin activity.

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BCL-3 does not mediate β-catenin activity through promoting nuclear translocation or altering levels of LEF1. BCL-3 does not mediate β-catenin activity through promoting nuclear translocation or altering levels of LEF1. (A) Nuclear/cytoplasmic enrichments of LS174T and SW1463 cells following BCL-3 suppression, showing localisation and expression of the Wnt transcriptional regulators β-catenin, TCF4 and LEF1. Western analysis confirms BCL-3 suppression. α-tubulin and lamin A/C serve as loading controls and confirm cytoplasmic/nuclear enrichment. WCL, whole cell lysate; C, cytoplasm-enriched lysate; N, nuclear-enriched lysate. (B) LGR5 expression following LEF1 suppression with 25 nM and 50 nM siRNA in SW1463 cells. Data shows 48 h post-siRNA transfection. α-tubulin serves as a loading control. (C) ChIP analysis of three sites in the LGR5 promoter in SW1463 cells for presence of TCF4 and BCL-3. H2O serves as a negative control for PCR. IgG serves as a negative control for immunoprecipitation (IP). Acetylated histone H3 serves as a positive control for IP. GPRC5A DS primers were designed to a downstream region in the GPRC5A gene with no reported transcription-factor binding and serves as a negative primer control. Danny N. Legge et al. Dis. Model. Mech. 2019;12:dmm037697 © 2019. Published by The Company of Biologists Ltd