Ribonuclease Z

TRNase Z (EC 3.1.26.11, 3 tRNase, tRNA 3 endonuclease, RNase Z, 3' tRNase) is an enzyme^{[1][2][3][4][5][6][7]} that, among other things, catalyses the reactions involved in the maturation of tRNAs. Here, it endonucleolytically cleaves the RNA and removes extra 3' nucleotides from the tRNA precursor, generating the 3' termini of tRNAs. A 3'-hydroxy group is left at the tRNA terminus and a 5'-phosphoryl group is left at the trailer molecule. Similarly, it processes tRNA-like molecules such as mascRNA.^[8]

TRNase Z
Identifiers
EC no.	3.1.26.11
CAS no.	98148-84-6
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Search PMC articles PubMed articles NCBI proteins

References

1. Schiffer S, Rösch S, Marchfelder A (June 2002). "Assigning a function to a conserved group of proteins: the tRNA 3'-processing enzymes". The EMBO Journal. 21 (11): 2769–77. doi:10.1093/emboj/21.11.2769. PMC 126033. PMID 12032089.
2. Mayer M, Schiffer S, Marchfelder A (February 2000). "tRNA 3' processing in plants: nuclear and mitochondrial activities differ". Biochemistry. 39 (8): 2096–105. doi:10.1021/bi992253e. PMID 10684660.
3. Schiffer S, Helm M, Théobald-Dietrich A, Giegé R, Marchfelder A (July 2001). "The plant tRNA 3' processing enzyme has a broad substrate spectrum". Biochemistry. 40 (28): 8264–72. doi:10.1021/bi0101953. PMID 11444972.
4. Kunzmann A, Brennicke A, Marchfelder A (January 1998). "5' end maturation and RNA editing have to precede tRNA 3' processing in plant mitochondria". Proceedings of the National Academy of Sciences of the United States of America. 95 (1): 108–13. doi:10.1073/pnas.95.1.108. PMC 18142. PMID 9419337.
5. Mörl M, Marchfelder A (January 2001). "The final cut. The importance of tRNA 3'-processing". EMBO Reports. 2 (1): 17–20. doi:10.1093/embo-reports/kve006. PMC 1083803. PMID 11252717.
6. Minagawa A, Takaku H, Takagi M, Nashimoto M (April 2004). "A novel endonucleolytic mechanism to generate the CCA 3' termini of tRNA molecules in Thermotoga maritima". The Journal of Biological Chemistry. 279 (15): 15688–97. doi:10.1074/jbc.M313951200. PMID 14749326.
7. Takaku H, Minagawa A, Takagi M, Nashimoto M (May 2003). "A candidate prostate cancer susceptibility gene encodes tRNA 3' processing endoribonuclease". Nucleic Acids Research. 31 (9): 2272–8. doi:10.1093/nar/gkg337. PMC 154223. PMID 12711671.
8. Wilusz JE, Freier SM, Spector DL (November 2008). "3' end processing of a long nuclear-retained noncoding RNA yields a tRNA-like cytoplasmic RNA". Cell. 135 (5): 919–32. doi:10.1016/j.cell.2008.10.012. PMC 2722846. PMID 19041754.

External links

• TRNase+Z at the U.S. National Library of Medicine Medical Subject Headings (MeSH)