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Nucleobase catalysts for the enzymatic activation of 8-oxoguanine DNA glycosylase 1
ChemRxiv Pub Date : 2025-01-02 , DOI: 10.26434/chemrxiv-2023-70gws-v4 Maurice, Michel, Emily C., Hank, Nicholas, D'Arcy-Evans, Olov, Wallner, Florian , Ortis, Liuzhen, Meng, Patricia, Calvo, Emma Rose, Scaletti, Sara, Kosenina, Holly , Dawson, Josephine, Stewart, Adam, Dickey, Mikhael E., Astorga, Elisée, Wiita, Marek, Varga, Evert J, Homan, Ann-Sofie, Jemth, Carlos, Benítez-Buelga, Martin, Scobie, Thomas, Helleday, Pål, Stenmark, Miguel, de Vega, Kaixin, Zhou, Ingrid, Almlöf, Stefan, Knapp, Andreas, Krämer, Maeve, Long, Leandro, Sastre
ChemRxiv Pub Date : 2025-01-02 , DOI: 10.26434/chemrxiv-2023-70gws-v4 Maurice, Michel, Emily C., Hank, Nicholas, D'Arcy-Evans, Olov, Wallner, Florian , Ortis, Liuzhen, Meng, Patricia, Calvo, Emma Rose, Scaletti, Sara, Kosenina, Holly , Dawson, Josephine, Stewart, Adam, Dickey, Mikhael E., Astorga, Elisée, Wiita, Marek, Varga, Evert J, Homan, Ann-Sofie, Jemth, Carlos, Benítez-Buelga, Martin, Scobie, Thomas, Helleday, Pål, Stenmark, Miguel, de Vega, Kaixin, Zhou, Ingrid, Almlöf, Stefan, Knapp, Andreas, Krämer, Maeve, Long, Leandro, Sastre
: Bifunctional DNA glycosylases employ an active site lysine or the N-terminus to form a Schiff base with the abasic site (AP site) base excision repair (BER) intermediate. Cleaving this reversible structure is the rate-determining step in the initiation of 8-oxoguanine (8-oxoG) repair for 8-oxoguanine DNA glycosylase 1 (OGG1). The OGG1 AP lyase activity can be increased using small molecule binders, called organocatalytic switches, to cleave the DNA backbone in a similar manner as a bifunctional DNA glycosylase. In search for novel organocatalytic switches we here identify 8-Substituted 6 thioguanines and 6-amino-pyrazolo-[3,4-d]-pyrimidine derivatives as potent and selective scaffolds enabling OGG1 to cleave AP sites opposite any canonical nucleobase by β-elimination, shaping a complete, artificial AP-lyase function. These new tool compounds enhance the cellular repair of 8-oxoG and AP sites, activating a rudimentary but canonical enzymatic activity.
中文翻译:
用于酶促激活 8-氧鸟嘌呤 DNA 糖基化酶 1 的核碱基催化剂
: 双功能 DNA 糖基化酶利用活性位点赖氨酸或 N 端与脱碱基位点 (AP 位点) 碱基切除修复 (BER) 中间体形成 Schiff 碱基。裂解这种可逆结构是 8-氧鸟嘌呤 DNA 糖基化酶 1 (OGG1) 的 8-氧鸟嘌呤 (8-oxoG) 修复开始的速率决定步骤。OGG1 AP 裂解酶活性可以使用小分子结合物(称为有机催化开关)来增加,以类似于双功能 DNA 糖基化酶的方式切割 DNA 骨架。在寻找新的有机催化开关时,我们在这里确定了 8-取代的 6 硫鸟嘌呤和 6-氨基-吡唑并-[3,4-d]-嘧啶衍生物作为有效的选择性支架,使 OGG1 能够通过β消除切割任何经典核碱基对面的 AP 位点,形成完整的人工 AP 裂解酶功能。这些新的工具化合物增强了 8-oxoG 和 AP 位点的细胞修复,激活了基本但经典的酶活性。
更新日期:2025-01-02
中文翻译:
用于酶促激活 8-氧鸟嘌呤 DNA 糖基化酶 1 的核碱基催化剂
: 双功能 DNA 糖基化酶利用活性位点赖氨酸或 N 端与脱碱基位点 (AP 位点) 碱基切除修复 (BER) 中间体形成 Schiff 碱基。裂解这种可逆结构是 8-氧鸟嘌呤 DNA 糖基化酶 1 (OGG1) 的 8-氧鸟嘌呤 (8-oxoG) 修复开始的速率决定步骤。OGG1 AP 裂解酶活性可以使用小分子结合物(称为有机催化开关)来增加,以类似于双功能 DNA 糖基化酶的方式切割 DNA 骨架。在寻找新的有机催化开关时,我们在这里确定了 8-取代的 6 硫鸟嘌呤和 6-氨基-吡唑并-[3,4-d]-嘧啶衍生物作为有效的选择性支架,使 OGG1 能够通过β消除切割任何经典核碱基对面的 AP 位点,形成完整的人工 AP 裂解酶功能。这些新的工具化合物增强了 8-oxoG 和 AP 位点的细胞修复,激活了基本但经典的酶活性。