人类 8-氧鸟嘌呤糖基化酶 OGG1 通过半胱氨酸和组氨酸的加成作用裂解消融位点并与 3'-DNA 端部共价结合。

IF 2.6 4区生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY

ChemBioChem Pub Date : 2025-01-14 Epub Date: 2024-11-11 DOI:10.1002/cbic.202400705

Cameron Bryan, Kun Yang

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引用次数: 0

摘要

8-氧代鸟嘌呤糖基化酶 1（OGG1）可修复主要的 DNA 氧化损伤--8-氧代-2'-脱氧鸟苷。据报道，OGG1 能切开最常见的 DNA 损伤--嘌呤/近嘧啶（AP）位点，并在此过程中形成稳定的 DNA-OGG1 交联。然而，这种加合物的化学结构并不确定。在这里，我们报告说，DNA-OGG1 交联是由半胱氨酸和组氨酸加到 3'-DNA 端部切口 AP 位点上形成的。

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Human 8-Oxoguanine Glycosylase OGG1 Cleaves Abasic Sites and Covalently Conjugates to 3'-DNA Termini via Cysteine and Histidine Addition.

8-Oxoguanine glycosylase 1 (OGG1) repairs the major oxidative DNA damage, 8-oxo-2'-deoxyguanosine. It has been reported that OGG1 incises the most frequently formed DNA lesion, apurinic/apyrimidinic (AP) site, and in the process a stable DNA-OGG1 cross-link is formed. However, the chemical structure of the adduct is not characterized. Here, we report that DNA-OGG1 cross-links result from cysteine and histidine addition to incised AP sites at 3'-DNA termini.

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来源期刊

ChemBioChem 生物-生化与分子生物学

CiteScore

6.10

自引率

3.10%

发文量

407

审稿时长

1 months

期刊介绍： ChemBioChem (Impact Factor 2018: 2.641) publishes important breakthroughs across all areas at the interface of chemistry and biology, including the fields of chemical biology, bioorganic chemistry, bioinorganic chemistry, synthetic biology, biocatalysis, bionanotechnology, and biomaterials. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies, and supported by the Asian Chemical Editorial Society (ACES).