Efficient and sensitive profiling of RNA-protein interactions using TLC-CLIP.

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• RNA-binding proteins (RBPs) are crucial for post-transcriptional gene regulation.
• Existing methods for profiling RNA-protein interactions in vivo are challenging and require substantial starting material.

Purpose of the Study:

• To present an improved library preparation strategy for crosslinking and immunoprecipitation (CLIP) called TLC-CLIP.
• To enhance the sensitivity and efficiency of profiling RNA-protein interactions.

Main Methods:

• Developed a streamlined, bead-based library preparation strategy (TLC-CLIP).
• Incorporated solid-phase cDNA generation and ribotailing for enhanced adapter ligation efficiency.
• Eliminated time-consuming purification steps, reducing sample loss.

Main Results:

• TLC-CLIP enables profiling of RNA-protein interactions from as few as 1000 cells, demonstrating unparalleled sensitivity.
• The method shows high reproducibility and improved precision due to increased crosslinking-induced deletions.
• Crosslinking-induced deletions serve as an intrinsic quality metric, enhancing specificity and nucleotide resolution.

Conclusions:

• TLC-CLIP offers a sensitive, efficient, and streamlined approach for in vivo RNA-protein interaction profiling.
• The technique is suitable for analyzing endogenous RNA-binding proteins with minimal cell input.
• Improved precision and intrinsic quality control metrics advance the study of gene regulation.