Related Experiment Video
Updated: Apr 17, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
Cardiac transcription factor Nkx2.5 interacts with p53 and modulates its activity
Snezana Kojic1, Aleksandra Nestorovic1, Ljiljana Rakicevic1
1Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia.
Abstract:
Transcription factor Nkx2.5, essential for heart development, regulates cardiomyocyte-specific gene expression through combinatorial interactions with other cardiac-restricted (GATA4 and dHAND) or ubiquitous (p300) transcription regulators. Here we demonstrate that Nkx2.5 and p53 synergistically activate the promoter of the striated muscle stress responsive transcriptional cofactor Ankrd2, involved in coordination of proliferation and apoptosis during myogenic differentiation. Moreover, the p53 protein is able to interact with both wild type Nkx2.5 and its mutant ΔNkx2.5 (aa 1-198) found in patients with diverse cardiac malformations. Nkx2.5 interaction site of p53 maps to the C terminal region, while p53 binding site on Nkx2.5 lies outside its C terminus. In addition, overexpression of Nkx2.5 has a modulatory, promoter dependent effect on p53 transactivation, while the mutant significantly abolished p53 activity on the Mdm2, p21(WAF1/CIP1) and Bax promoters. Their physical interaction contributes to the observed behavior in the case of the Mdm2 promoter. Our data provide a new evidence for the role of p53 in cardiac function through interaction with Nkx2.5.
More Related Videos
04:56Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence
Published on: December 30, 2025
09:32Procedure and Key Optimization Strategies for an Automated Capillary Electrophoretic-based Immunoassay Method
Published on: September 10, 2017
Related Concept Videos
Abnormal Proliferation
Interactions Between Signaling Pathways
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Negative Regulator Molecules
Inhibition of Cdk Activity
Covalently Linked Protein Regulators
These groups modify specific amino acids in a protein....
Co-activators and Co-repressors