Also abbreviated as ARS. An enzyme that specifically bonds amino acids that match the code in the anticodon to transfer RNA (tRNA). Therefore, there are specific ARSs for each of the 20 types of amino acids. This enzyme is essential for the accurate transfer of genetic information to amino acid sequences, and requires the ability to recognize the fine structure of tRNA with great precision. In the presence of ATP, it activates amino acids and esterifies the amino acid to the adenosine at the 3' end of tRNA to create aminoacyl-tRNA. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
ARSとも略記。転移 RNA (tRNA) にアンチコドンの暗号に適合したアミノ酸を特異的に結合させる酵素。したがって 20種類のアミノ酸に対応してそれぞれ特異的な ARSが存在する。遺伝情報が正確にアミノ酸配列に伝えられるために必須な酵素で,tRNAの微細構造をきわめて正確に認識する能力が必要となる。 ATP存在下でアミノ酸を活性化し,tRNAの3′末端のアデノシンにアミノ酸をエステル結合させ,アミノアシル tRNAをつくる。
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