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神秘而迷人:DNA 聚合酶 ɩ 在发现 20 年后仍然扑朔迷离。

Mysterious and fascinating: DNA polymerase ɩ remains enigmatic 20 years after its discovery.

机构信息

Laboratory of Genomic Integrity, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892-3371, USA.

Laboratory of Genomic Integrity, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892-3371, USA.

出版信息

DNA Repair (Amst). 2020 Sep;93:102914. doi: 10.1016/j.dnarep.2020.102914.

DOI:10.1016/j.dnarep.2020.102914
PMID:33087280
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7586464/
Abstract

With the publication of the first paper describing the biochemical properties of DNA polymerase iota (polɩ), the question immediately arose as to why cells harbor such a low-fidelity enzyme which often violates the Watson-Crick base pairing rules? Yet 20 years after its discovery, the cellular function of polɩ remains unknown. Here, we provide a graphical review of the unique biochemical properties of polɩ and speculate about the cellular pathways in which enigmatic polɩ may participate.

摘要

随着第一篇描述 DNA 聚合酶iota(polɩ)生化特性的论文发表,人们立即提出了这样一个问题:为什么细胞中存在这种低保真度的酶,它经常违反沃森-克里克碱基配对规则?然而,在它被发现 20 年后,polɩ 的细胞功能仍然未知。在这里,我们提供了一个关于 polɩ 独特生化特性的图形化综述,并推测了神秘的 polɩ 可能参与的细胞途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/953905ec2629/nihms-1610541-f0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/88473e6070dd/nihms-1610541-f0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/ec6a50a75809/nihms-1610541-f0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/598c3fb4be02/nihms-1610541-f0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/0b74aac3196d/nihms-1610541-f0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/953905ec2629/nihms-1610541-f0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/88473e6070dd/nihms-1610541-f0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/ec6a50a75809/nihms-1610541-f0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/598c3fb4be02/nihms-1610541-f0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/0b74aac3196d/nihms-1610541-f0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ba/7586464/953905ec2629/nihms-1610541-f0005.jpg

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本文引用的文献

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Polymerase iota - an odd sibling among Y family polymerases.聚合酶iota——Y 家族聚合酶中的一个奇异兄弟。
DNA Repair (Amst). 2020 Feb;86:102753. doi: 10.1016/j.dnarep.2019.102753. Epub 2019 Nov 20.
2
Translesion DNA polymerases in eukaryotes: what makes them tick?真核生物中的跨损伤DNA聚合酶:它们是如何工作的?
Crit Rev Biochem Mol Biol. 2017 Jun;52(3):274-303. doi: 10.1080/10409238.2017.1291576. Epub 2017 Mar 9.
3
Mouse DNA polymerase ι lacking the forty-two amino acids encoded by exon-2 is catalytically inactive in vitro.
聚合酶 ι(Pol ι)可防止 PrimPol 介导的新生 DNA 合成和染色体不稳定性。
Sci Adv. 2023 Apr 14;9(15):eade7997. doi: 10.1126/sciadv.ade7997.
4
Beyond the Lesion: Back to High Fidelity DNA Synthesis.超越损伤:回归高保真DNA合成。
Front Mol Biosci. 2022 Jan 5;8:811540. doi: 10.3389/fmolb.2021.811540. eCollection 2021.
5
Identification and Characterization of Thermostable Y-Family DNA Polymerases η, ι, κ and Rev1 From a Lower Eukaryote, .来自低等真核生物的耐热Y家族DNA聚合酶η、ι、κ和Rev1的鉴定与表征
Front Mol Biosci. 2021 Nov 3;8:778400. doi: 10.3389/fmolb.2021.778400. eCollection 2021.
缺少外显子2编码的42个氨基酸的小鼠DNA聚合酶ι在体外没有催化活性。
DNA Repair (Amst). 2017 Feb;50:71-76. doi: 10.1016/j.dnarep.2016.12.004. Epub 2016 Dec 21.
4
DNA polymerase ι functions in the generation of tandem mutations during somatic hypermutation of antibody genes.DNA聚合酶ι在抗体基因体细胞超突变过程中串联突变的产生中发挥作用。
J Exp Med. 2016 Aug 22;213(9):1675-83. doi: 10.1084/jem.20151227. Epub 2016 Jul 25.
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Increased catalytic activity and altered fidelity of human DNA polymerase iota in the presence of manganese.在锰存在的情况下,人类DNA聚合酶iota的催化活性增加且保真度改变。
J Biol Chem. 2007 Aug 24;282(34):24689-96. doi: 10.1074/jbc.M702159200. Epub 2007 Jul 2.
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Evidence that in xeroderma pigmentosum variant cells, which lack DNA polymerase eta, DNA polymerase iota causes the very high frequency and unique spectrum of UV-induced mutations.有证据表明,在缺乏DNA聚合酶η的着色性干皮病变异细胞中,DNA聚合酶ι会导致紫外线诱导的突变出现非常高的频率和独特的谱型。
Cancer Res. 2007 Apr 1;67(7):3018-26. doi: 10.1158/0008-5472.CAN-06-3073.
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Normal hypermutation in antibody genes from congenic mice defective for DNA polymerase iota.来自DNA聚合酶ι缺陷的同源小鼠抗体基因的正常超突变。
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