In enzymology, an aspartate—tRNA ligase (EC 6.1.1.12) is an enzyme that catalyzes the chemical reaction
- ATP + L-aspartate + tRNAAsp AMP + diphosphate + L-aspartyl-tRNAAsp
| Aspartate—tRNA ligase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 6.1.1.12 | ||||||||
| CAS no. | 9027-32-1 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
The 3 substrates of this enzyme are ATP, L-aspartate, and tRNA(Asp), whereas its 3 products are AMP, diphosphate, and L-aspartyl-tRNA(Asp).
This enzyme belongs to the family of ligases, to be specific those forming carbon-oxygen bonds in aminoacyl-tRNA and related compounds. The systematic name of this enzyme class is L-aspartate:tRNAAsp ligase (AMP-forming). Other names in common use include aspartyl-tRNA synthetase, aspartyl ribonucleic synthetase, aspartyl-transfer RNA synthetase, aspartic acid translase, aspartyl-transfer ribonucleic acid synthetase, and aspartyl ribonucleate synthetase. This enzyme participates in alanine and aspartate metabolism and aminoacyl-trna biosynthesis.
Structural studies
As of late 2007, 10 structures have been solved for this class of enzymes, with PDB accession codes 1ASY, 1ASZ, 1B8A, 1C0A, 1EFW, 1EOV, 1EQR, 1G51, 1IL2, and 1L0W.
See also
References
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