Recombinant Ribonuclease U2 protein

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Ribonuclease U2 also known as U2 RNase or RNase U2 is an enzyme that cleaves RNA molecules at specific sites generating 2’3’-cyclic phosphates and 5’-hydroxyl termini. This enzyme has a molecular mass of approximately 30 kDa. It is expressed predominantly in the fungus Ustilago sphaerogena where it plays an important role in RNA degradation. Ribonuclease U2 has been well-studied for its specific RNA cleavage mechanism which involves the recognition and catalysis of purine-rich sequences.

Biological function summary

Ribonuclease U2 is involved in the regulated degradation of RNA molecules contributing to the control of gene expression and mRNA turnover within the cell. Although not known as part of any large complex Ribonuclease U2 participates in the cellular RNA metabolism processes ensuring the maintenance of RNA molecule integrity and turnover. This activity is central to modulating gene expression levels and removing defective or unnecessary RNA transcripts within the cellular environment.

Pathways

The enzymatic actions of Ribonuclease U2 link to the RNA degradation pathways which are important for gene expression regulation. The pathways it participates in interact with other proteins involved in RNA metabolism such as Dicer and Drosha which are essential for small RNA processing and maturation. Ribonuclease U2 complements these actions by providing RNA fragment degradation capabilities ensuring proper RNA lifecycle management within the cell.

Abnormalities in RNA degradation including those involving Ribonuclease U2 have connections with neurodegenerative diseases like amyotrophic lateral sclerosis (ALS). Changes in RNA metabolism have been implicated in the pathology of ALS where proteins such as TDP-43 also play a significant role. Furthermore altered RNA turnover and the associated improper gene expression which can result from dysregulation of enzymes like RNase U2 may drive pathological processes in certain cancers.