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Development and Evaluation of a Structural Model for SF1B Helicase Dda

机译:SF1B解旋酶Dda结构模型的开发和评估

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摘要

Helicases are proteins that unwind double-stranded nucleic acids. Dda helicase fromnbacteriophage T4 has served as an excellent model for understanding the molecular mechanism of thisnclass of enzymes. Study of the structure of Dda may reveal why some helicases translocate in a 5′ to 3′ndirection on DNA, while others translocate in a 3′ to 5′ direction. Attaining a structure of Dda has provenndifficult because the protein fails to readily form crystals and is too large for current NMR technologies.nWe have developed a homology model of the enzyme which will serve to guide studies that examine thenstructural and functional significance of the interaction between Dda and DNA and how this interactionnaffects translocation and unwinding of DNA. We have tested the structural model by using methods fornmapping protein domains and for examining protein surfaces that interact with DNA.
机译:解旋酶是解开双链核酸的蛋白质。来自噬菌体T4的Dda解旋酶已成为理解此类酶分子机制的极佳模型。对Dda结构的研究可能揭示了为什么某些解旋酶在DNA上以5'至3'n方向易位,而另一些在3'至5'方向易位。由于蛋白质无法轻易形成晶体并且对于当前的NMR技术而言太大,因此难以获得Dda的结构.n我们已经开发出一种酶的同源模型,该酶模型将用于指导研究Dda之间相互作用的结构和功能意义的研究。 DNA以及这种相互作用如何影响DNA的易位和解旋。我们已经通过使用映射蛋白质结构域和检查与DNA相互作用的蛋白质表面的方法测试了结构模型。

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  • 来源
    《Biochemistry》 |2009年第11期|p.2321-2329|共9页
  • 作者单位

    Department of Biochemistry and Molecular Biology, UniVersity of Arkansas for Medical Sciences, Little Rock, Arkansas 72205;

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