Srs2 and Pif1 as Model Systems for Understanding Sf1a and Sf1b Helicase Structure and Function.

Srs2 and Pif1 as Model Systems for Understanding Sf1a and Sf1b Helicase Structure and Function.
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DOI:
10.3390/genes12091319
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发表时间:
2021-08-26
期刊:
影响因子:
3.5
通讯作者:
Greene EC
Greene EC
中科院分区:
生物学3区
文献类型:
--
作者:
Meir A;Greene EC

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解旋酶是将 ATP 中储存的化学能转化为机械功的酶,使它们能够移动并操纵核酸。解旋酶超家族 1 (Sf1) 是最大的解旋酶亚群之一,它们是生命各个领域的一系列细胞活动所必需的。 Sf1 解旋酶可以进一步细分为两类,称为 Sf1a 和 Sf1b 解旋酶,它们在核酸上以相反的方向移动。这种运动的结果范围从双链体核酸内链的分离到核蛋白复合物的物理重塑或去除。在这里,我们描述了来自模式生物酿酒酵母的 Sf1a 解旋酶 Srs2 和 Sf1b 解旋酶 Pif1 的特征,重点关注它们在同源重组中发挥的作用,同源重组是维持基因组完整性所必需的 DNA 修复途径。
Helicases are enzymes that convert the chemical energy stored in ATP into mechanical work, allowing them to move along and manipulate nucleic acids. The helicase superfamily 1 (Sf1) is one of the largest subgroups of helicases and they are required for a range of cellular activities across all domains of life. Sf1 helicases can be further subdivided into two classes called the Sf1a and Sf1b helicases, which move in opposite directions on nucleic acids. The results of this movement can range from the separation of strands within duplex nucleic acids to the physical remodeling or removal of nucleoprotein complexes. Here, we describe the characteristics of the Sf1a helicase Srs2 and the Sf1b helicase Pif1, both from the model organism Saccharomyces cerevisiae, focusing on the roles that they play in homologous recombination, a DNA repair pathway that is necessary for maintaining genome integrity.
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