Related Experiment Video
Updated: May 20, 2025

An Assay for Quantifying Protein-RNA Binding in Bacteria
Published on: June 12, 2019
Conditional Binding of Arsenic Trioxide (ATO) to Cysteine-Rich Zinc Finger Motifs within RBCC Domain of PML Protein
Pei Han Yu, Yu-Ki Tanaka1, Yang Gao
1Graduate School of Pharmaceutical Sciences, Chiba University, Chiba 260-0856, Japan.
Abstract:
The arsenic trioxide (ATO)-based cure of acute promyelocytic leukemia is attributed to PML/RARα oncoprotein degradation through binding of its RBCC domain (i.e., consist of RING, B-box1, B-box2, and Coiled-coil) with arsenic. Despite ATO being proven to interact with the Cysteine213 triad in the B-box2 trimer of PML-Nuclear Bodies, whether its direct binding to cysteine-rich zinc finger motifs in PML protein, remains unclear. Consequently, we purified the RING, B-box1, and B-box2 domains to assess their potential for arsenic-binding. The results showed that ATO cannot displace zinc ions under physiological conditions but binds with zinc finger domains under zinc-depletion in low-pH conditions, revealing a conditional binding mechanism.
More Related Videos
Related Concept Videos
Covalently Linked Protein Regulators
These groups modify specific amino acids in a protein....
Conserved Binding Sites
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Regulation of Nuclear Protein Sorting
Assembly of Signaling Complexes
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Allosteric Proteins-ATCase
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis...
Protein Complex Assembly
Many viruses self-assemble into a fully functional unit using the infected host cell to...

