氨酰-tRNA合成酶
氨酰tRNA合成酶（aminoacyl tRNA synthetase，通常简写为aaRS）是一类催化特定氨基酸或其前体与对应tRNA发生酯化反应而形成氨酰tRNA的酶。由于每一种的氨基酸与tRNA的连接都需要专一性的氨酰tRNA合成酶来催化，因此氨酰tRNA合成酶的种类与标准氨基酸的数量一样都为20种。
氨酰tRNA合成酶也是自然界中最古老的蛋白质之一。
Aminoacyl tRNA synthetase
中文百科
英语百科
Aminoacyl tRNA synthetase 氨酰-tRNA合成酶
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![Glutaminyl-ARNt synthétase d'E. coli complexée avec un ARNtGln (PDB 1QRS[1]).](/Images/godic/202412/20/Glutaminyl-tRNA_Synthetase_1QRS2928.png")
An aminoacyl tRNA synthetase (aaRS) is an enzyme that attaches the appropriate amino acid onto its tRNA. It does so by catalyzing the esterification of a specific cognate amino acid or its precursor to one of all its compatible cognate tRNAs to form an aminoacyl-tRNA.
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