ジャーナル: J Biol Chem / 年: 2015 タイトル: DNA induces conformational changes in a recombinant human minichromosome maintenance complex. 著者: Emma L Hesketh / Richard P Parker-Manuel / Yuriy Chaban / Rabab Satti / Dawn Coverley / Elena V Orlova / James P J Chong / 要旨: ATP-dependent DNA unwinding activity has been demonstrated for recombinant archaeal homohexameric minichromosome maintenance (MCM) complexes and their yeast heterohexameric counterparts, but in ...ATP-dependent DNA unwinding activity has been demonstrated for recombinant archaeal homohexameric minichromosome maintenance (MCM) complexes and their yeast heterohexameric counterparts, but in higher eukaryotes such as Drosophila, MCM-associated DNA helicase activity has been observed only in the context of a co-purified Cdc45-MCM-GINS complex. Here, we describe the production of the recombinant human MCM (hMCM) complex in Escherichia coli. This protein displays ATP hydrolysis activity and is capable of unwinding duplex DNA. Using single-particle asymmetric EM reconstruction, we demonstrate that recombinant hMCM forms a hexamer that undergoes a conformational change when bound to DNA. Recombinant hMCM produced without post-translational modifications is functional in vitro and provides an important tool for biochemical reconstitution of the human replicative helicase.
全体 : Recombinant human mini chromosome maintenance complex bound to a ...
全体
名称: Recombinant human mini chromosome maintenance complex bound to a DNA substrate
要素
試料: Recombinant human mini chromosome maintenance complex bound to a DNA substrate
タンパク質・ペプチド: human minichromosome maintenance (2-7) complex
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超分子 #1000: Recombinant human mini chromosome maintenance complex bound to a ...
超分子
名称: Recombinant human mini chromosome maintenance complex bound to a DNA substrate タイプ: sample / ID: 1000 / 集合状態: heterohexamer / Number unique components: 1
分子量
理論値: 567 KDa
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分子 #1: human minichromosome maintenance (2-7) complex