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Related Experiment Video

Updated: Jul 12, 2025

Method for Identifying Small Molecule Inhibitors of the Protein-protein Interaction Between HCN1 and TRIP8b

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Published on: November 11, 2016

Functional Insight into hTRIR.

Jumin Xie¹, Hui Mao²

¹Biochemistry and Molecular Biology, Hubei Polytechnic University, Huangshi, Hubei 435003, P.R. China.

Current Molecular Medicine

|October 23, 2023

Summary

This summary is machine-generated.

The newly discovered human telomerase RNA-interacting ribonuclease (hTRIR) cleaves RNA, functioning as an endoribonuclease. This enzyme works across various conditions without needing divalent cations for its activity.

Keywords:

Endoribonuclease RNA digestion.RNase hTRIR methylated RNA ribonuclease

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Area of Science:

Molecular Biology
Enzymology
RNA Processing

Background:

The protein C19orf43, now named human telomerase RNA-interacting ribonuclease (hTRIR), was identified for its association with telomerase RNA (hTR) maturation.
Previous studies demonstrated C19orf43's ability to cleave various RNA types, but not DNA.

Discussion:

hTRIR exhibits robust enzymatic activity across a wide range of temperatures and pH, notably without requiring divalent cations.
The enzyme demonstrates cleavage at all four nucleotide sites, with a preference for purines.
hTRIR's digestion of both ends of methylated small RNA suggests it functions as an endoribonuclease, distinguishing it from other RNases like RNase A.

Key Insights:

hTRIR is a novel endoribonuclease involved in RNA processing.
The enzyme's unique characteristics include cation-independent activity and preferential cleavage at purines.
Experimental evidence supports hTRIR's role in cleaving methylated RNA from both ends.

Outlook:

Further characterization of hTRIR's specific biological roles in RNA metabolism.
Investigating the structural basis for hTRIR's unique substrate specificity and catalytic mechanism.
Exploring potential applications of hTRIR in biotechnology or therapeutic strategies related to RNA.