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The Conformation of Transfer RNA

Authors: Shigesada Higuchi;

The Conformation of Transfer RNA

Abstract

一定の塩基配列で規定される転移リボ核酸(tRNA)は鎖内部での特異的塩基対形成によってクローバー葉形の二次構造をとる。三次元的にはクローバー葉構造が折りたたまれて高次構造を形成するが,その存在は主として熱変性過程の研究から明らかになった。t RNAのコンホメーションの安定化には陽イオン,とりわけ二価金属イオンが大きな効果を示す。Mg++,Mn++,Co++などはtRNAに約20~30個特異的に結合し,その会合定数は103~104の大きさである。ある種のtRNAには生物活性形と変性形が見出され,相互変換には二価イオンが決定的な役割を果す。活性形は約2~3個の二価イオン部位をよけいにもち,変換にはリン酸基の中和を伴うコンホメーション変化が起こると考えられる。tRNAコンホメーションを探求する手段の一つとして赤外吸収スペクトル法は塩基対の様子を調べるのにすぐれているのでその応用を述べた。さらに他の様々な手法が概観された。

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze