Related Experiment Video
Updated: Mar 13, 2026
11:19
Isolation of Translating Ribosomes Containing Peptidyl-tRNAs for Functional and Structural Analyses
Published on: February 25, 2011
20.4K
Selective Isolation of TOP3B•mRNA Covalent Intermediates Using Denaturing Oligo-dT Pulldown
Julia E Warrick1, Michael G Kearse1
1Department of Biological Chemistry and Pharmacology, Center for RNA Biology, The Ohio State University, Columbus, OH, USA.
Bio-Protocol
|March 12, 2026
Summary
This study presents a new method to capture Topoisomerase 3β (TOP3B) mRNA covalent intermediates, improving the study of TOP3B's role in neurological disorders.
Area of Science:
- Biochemistry
- Molecular Biology
- Neuroscience
Background:
- Topoisomerase 3β (TOP3B) mutations are linked to neurological disorders.
- TOP3B uniquely interacts with RNA, primarily mRNA, in the cytoplasm.
- Existing methods for studying TOP3B activity lack specificity for mRNA.
Purpose of the Study:
- To develop and optimize a protocol for isolating TOP3B•mRNA covalent intermediates.
- To enable specific detection of TOP3B's interaction with mRNA.
- To provide a more accurate method for studying TOP3B function in neurological disease research.
Main Methods:
- Utilized oligo-dT isolation of mRNA under denaturing conditions to capture TOP3B•mRNA covalent intermediates.
- Employed a dual membrane slot blotting strategy (nitrocellulose and nylon) for detection.
- Validated the protocol with tagged TOP3B in Neuro2A cells and recombinant EGFP.
Main Results:
- Successfully isolated and detected TOP3B•mRNA covalent intermediates.
- Demonstrated the specificity of the method for TOP3B-bound mRNA.
- Established slot blotting as a sensitive and high-throughput detection technique.
Conclusions:
- The developed protocol enables specific isolation and detection of TOP3B•mRNA covalent intermediates.
- This method offers an improvement over existing techniques for studying TOP3B activity.
- The protocol facilitates research into TOP3B's role in neurological disorders.
