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Transferase

I biokemi er en transferase et enzym, der katalyserer overførslen af en funktionel gruppe (fx en methyl- eller fosfatgruppe) fra ét molekyle (kaldet donoren) til et andet (kaldet acceptoren). For eksempel er et enzym, der katalyserer følgende reaktion, en transferase:

A–X + B → A + B–X

I dette eksempel er A donoren og B acceptoren. Donoren er ofte et coenzym.

Nomenklatur

Navne for transferaser dannes som "donor:acceptorgruppetransferase." Andre navne forekommer dog ofte. De almene navne til transferaser er ofte dannet som "acceptorgruppetransferase" eller "donorgruppetransferase." For eksempel er en DNA-methyltransferase en transferase, der katalyserer overførslen af en methylgruppe til en DNA-acceptor.

Klassifikation

Transferaser er klassificeret som EC 2 i EC-nummer-klassifikationen. Transferaser kan yderligere inddeles i ni underklasser:

Referencer

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