BCL11b interacts with RNA and proteins involved in RNA processing and developmental diseases

Area of Science:

• Molecular Biology
• Genetics
• Epigenetics

Background:

• BCL11b is a known transcription regulator and tumor suppressor crucial for development and disease.
• Its role in HIV latency, cell cycle, differentiation, and apoptosis is established.
• However, the specific protein complexes BCL11b associates with for gene regulation remain largely unknown.

Purpose of the Study:

• To identify and characterize the ribonucleoprotein complexes associated with BCL11b.
• To elucidate the functional implications of these interactions in gene expression and cellular processes.

Main Methods:

• Utilized CLIP-seq to identify direct RNA binding sites of BCL11b.
• Employed quantitative LC-MS/MS mass spectrometry to identify interacting proteins.
• Integrated systems biology approaches for validation and pathway analysis.

Main Results:

• Identified interactions between BCL11b and key RNA processing/splicing proteins, including FUS, SMN1, UPF1, and Drosha.
• Demonstrated that BCL11b binds to RNA transcripts and proteins encoded by the same genes (e.g., FUS, ESWR1).
• Revealed BCL11b's association with nucleoprotein complexes regulating gene expression, impacting cell cycle, development, and disease pathways.

Conclusions:

• BCL11b interacts with specific protein and RNA components involved in RNA processing and splicing.
• These interactions are critical for regulating gene expression, including isoform selection.
• Findings provide a foundation for understanding BCL11b's role in developmental disorders and cancer.