Biology:CCA tRNA nucleotidyltransferase
| CCA tRNA nucleotidyltransferase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 2.7.7.72 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
CCA tRNA nucleotidyltransferase (EC 2.7.7.72, CCA-adding enzyme, tRNA adenylyltransferase, tRNA CCA-pyrophosphorylase, tRNA-nucleotidyltransferase, transfer-RNA nucleotidyltransferase, transfer ribonucleic acid nucleotidyl transferase, CTP(ATP):tRNA nucleotidyltransferase, transfer ribonucleate adenylyltransferase, transfer ribonucleate adenyltransferase, transfer RNA adenylyltransferase, transfer ribonucleate nucleotidyltransferase, ATP (CTP):tRNA nucleotidyltransferase, ribonucleic cytidylic cytidylic adenylic pyrophosphorylase, transfer ribonucleic adenylyl (cytidylyl) transferase, transfer ribonucleic-terminal trinucleotide nucleotidyltransferase, transfer ribonucleate cytidylyltransferase, ribonucleic cytidylyltransferase, -C-C-A pyrophosphorylase, ATP(CTP)-tRNA nucleotidyltransferase, tRNA adenylyl(cytidylyl)transferase, CTP:tRNA cytidylyltransferase) is an enzyme with systematic name CTP,CTP,ATP:tRNA cytidylyl,cytidylyl,adenylyltransferase.[1][2][3][4][5] This enzyme catalyses the following chemical reaction
- a tRNA precursor + 2 CTP + ATP [math]\displaystyle{ \rightleftharpoons }[/math] a tRNA with a 3' CCA end + 3 diphosphate (overall reaction)
- (1a) a tRNA precursor + CTP [math]\displaystyle{ \rightleftharpoons }[/math] a tRNA with a 3' cytidine end + diphosphate
- (1b) a tRNA with a 3' cytidine + CTP [math]\displaystyle{ \rightleftharpoons }[/math] a tRNA with a 3' CC end + diphosphate
- (1c) a tRNA with a 3' CC end + ATP [math]\displaystyle{ \rightleftharpoons }[/math] a tRNA with a 3' CCA end + diphosphate
The acylation of all tRNAs with an amino acid occurs at the terminal ribose of a 3' CCA sequence.
See also
- TRNT1
References
- ↑ "Purification and some properties of Escherichia coli tRNA nucleotidyltransferase". The Journal of Biological Chemistry 252 (15): 5584–8. August 1977. PMID 328503.
- ↑ "CCA addition by tRNA nucleotidyltransferase: polymerization without translocation?". The EMBO Journal 17 (11): 3197–206. June 1998. doi:10.1093/emboj/17.11.3197. PMID 9606201.
- ↑ "Crystal structure of the human CCA-adding enzyme: insights into template-independent polymerization". Journal of Molecular Biology 328 (5): 985–94. May 2003. doi:10.1016/S0022-2836(03)00381-4. PMID 12729736.
- ↑ "The HD domain of the Escherichia coli tRNA nucleotidyltransferase has 2',3'-cyclic phosphodiesterase, 2'-nucleotidase, and phosphatase activities". The Journal of Biological Chemistry 279 (35): 36819–27. August 2004. doi:10.1074/jbc.M405120200. PMID 15210699.
- ↑ "CCA addition to tRNA: implications for tRNA quality control". IUBMB Life 62 (4): 251–60. April 2010. doi:10.1002/iub.301. PMID 20101632.
External links
- CCA+tRNA+nucleotidyltransferase at the US National Library of Medicine Medical Subject Headings (MeSH)
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