Protocol for detecting lncRNA-protein interactions in vitro by tRSA RNA pull-down assay

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• Long non-coding RNAs (lncRNAs) are critical regulators of cellular functions.
• RNA-binding proteins (RBPs) interact with lncRNAs to mediate these regulatory roles.
• Understanding lncRNA-RBP interactions is essential for deciphering complex cellular processes.

Purpose of the Study:

• To present a novel in vitro protocol for detecting lncRNA-RBP interactions.
• To provide a method for screening RNA-interacting proteins.
• To facilitate the identification of novel RBPs associated with specific lncRNAs.

Main Methods:

• Development of a tRNA scaffold with a streptavidin aptamer for pull-down assays.
• Preparation of both protein and lncRNA transcripts for in vitro studies.
• Utilization of in vitro binding assays and western blot analysis for interaction detection.

Main Results:

• The protocol successfully enables the detection of lncRNA-RBP interactions in vitro.
• The method is adaptable for screening RNA-interacting proteins from cell lysates.
• It lays the groundwork for subsequent mass spectrometry analysis to identify novel RBPs.

Conclusions:

• The presented protocol offers a robust method for studying lncRNA-RBP interactions.
• This technique can be widely applied in molecular biology research for RBP screening.
• Further application can lead to the discovery of new regulatory networks involving lncRNAs and proteins.