Related Experiment Video
Updated: Jul 4, 2026

Biotin-based Pulldown Assay to Validate mRNA Targets of Cellular miRNAs
Published on: June 12, 2018
The p53 target protein Wig-1 binds hnRNP A2/B1 and RNA Helicase A via RNA
Magdalena Prahl1, Anna Vilborg, Carina Palmberg
1Department of Oncology-Pathology, Cancer Center Karolinska, Karolinska Institutet, Stockholm, Sweden.
Abstract:
The p53-induced Wig-1 gene encodes a double stranded RNA-binding zinc finger protein. We generated Saos-2 osteosarcoma cells expressing tetracycline-inducible Flag-tagged human Wig-1. Induction of Wig-1 expression by doxycycline inhibited cell growth in a long-term assay but did not cause any changes in cell cycle distribution nor increased fraction of apoptotic cells. Using co-immunoprecipitation and mass spectrometry, we identified two Wig-1-binding proteins, hnRNP A2/B1 and RNA Helicase A, both of which are involved in RNA processing. The binding was dependent on the presence of RNA. Our results establish a link between the p53 tumor suppressor and RNA processing via hnRNPA2/B1 and RNA Helicase A.
Related Concept Videos
Abnormal Proliferation
DNA Helicases
Negative Regulator Molecules
piRNA - Piwi-interacting RNAs
Covalently Linked Protein Regulators
These groups modify specific amino acids in a protein.
DNA Damage can Stall the Cell Cycle

