Fluorescing Isofunctional Ribonucleosides: Assessing Adenosine Deaminase Activity and Inhibition
作者:Paul T. Ludford、Alexander R. Rovira、Andrea Fin、Yitzhak Tor
DOI:10.1002/cbic.201800665
日期:2019.3.1
The enzymatic conversion of isothiazolo[4,3-d]pyrimidine-based adenosine (tz A) and 2-aminoadenosine (tz 2-AA) analogues to the corresponding isothiazolo[4,3-d]pyrimidine-based inosine (tz I) and guanosine (tz G) derivatives is evaluated and compared to the conversion of native adenosine to inosine. Henri-Michaelis-Menten analyses provides the foundation for a high-throughput screening assay, and the
Synthesis of some new thieno[3,4-<i>d</i>]pyrimidines and their<i>C</i>-nucleosides
作者:Shirish A. Patil、Brian A. Otter、Robert S. Klein
DOI:10.1002/jhet.5570300240
日期:1993.3
The synthesis of several new thieno[3,4-d]pyrimidine C-nucleosides 5-8 is described. The known 5-ribosyl-ated methyl 4-(formylamino)thiophene-3-carboxylate key intermediate 20 was obtained as a mixture of anomers in significantly improved yield by condensation of the sugar 15 with methyl 4-(formylamino)thio-phene-3-carboxylate 19 in nitromethane at 60° in the presence of stannic chloride. Attempts
描述了几种新的噻吩并[3,4- d ]嘧啶C-核苷5-8的合成。通过将糖15与甲基4-(甲酰基氨基)噻吩-3缩合,可以以显着提高的收率获得作为已知的5-核糖基化的4-(甲酰胺基氨基)噻吩-3-羧酸甲酯关键中间体20的混合物。在氯化锡存在下,在60°C的硝基甲烷中将羧酸19羧酸酯化。尝试以制备C-7核糖基化化合物21由双环基的直接缩合β 10与15给出而不是N-1核糖基化的核苷16。描述了相应的和以前未知的噻吩并[3,4- d ]嘧啶碱12和13的合成,以及对4-甲硫基衍生物12的稳定性研究。初步的生物学研究表明,腺苷类似物7是几种哺乳动物肿瘤细胞系的有效生长抑制剂。
Enzymatic Interconversion of Isomorphic Fluorescent Nucleosides: Adenosine Deaminase Transforms an Adenosine Analogue into an Inosine Analogue
作者:Renatus W. Sinkeldam、Lisa S. McCoy、Dongwon Shin、Yitzhak Tor
DOI:10.1002/anie.201307064
日期:2013.12.23
Adenosinedeaminase (ADA), a major enzyme involved in purine metabolism, converts an isomorphicfluorescentanalogue of adenosine (thA) into an isomorphicinosineanalogue (thI), which possesses distinct spectral features, allowing one to monitor the enzyme‐catalyzed reaction and its inhibition in real time. The utility of this sensitive fluorescence‐monitored transformation for the high‐throughput
腺苷脱氨酶(ADA) 是一种参与嘌呤代谢的主要酶,可将腺苷 ( th A) 的同构荧光类似物 ( th A) 转化为同构肌苷类似物 ( th I),该类似物具有独特的光谱特征,可用于监测酶催化反应并实时抑制。证明了这种灵敏的荧光监测转换在 ADA抑制剂的高通量检测和分析中的实用性。
A New Variant of Emissive RNA Alphabets
作者:Paul T. Ludford、Shenghua Yang、Marcela S. Bucardo、Yitzhak Tor
DOI:10.1002/chem.202104472
日期:2022.3
The substrate scope of T7 RNA Polymerase and adenosine deaminase (ADA) are expanded by the introduction of a new ribonucleoside alphabet based on a methylthieno[3,4-d]pyrimidine core. The majority of the new analogues display significantly red shifted emission relative to the corresponding thieno[3,4-d]pyrimidine and isothiazolo[4,3-d]pyrimidine based analogues.
通过引入基于甲基噻吩并[3,4- d ]嘧啶核心的新核糖核苷字母表,扩大了 T7 RNA 聚合酶和腺苷脱氨酶 (ADA) 的底物范围。相对于相应的基于噻吩并[3,4- d ]嘧啶和异噻唑并[4,3- d ]嘧啶的类似物,大多数新类似物显示出显着的红移发射。
Synthesis and antiviral evaluation of thieno[3,4-d]pyrimidine C-nucleoside analogues of 2′,3′-dideoxy- and 2′,3′-dideoxy-2′,3′-didehydro-adenosine and -inosine
Several thieno[3,4-d] pyrimidine derivatives, including four hitherto unknown 2',3'-dideoxy- and 2',3'-dideoxy- 2',3'-didehydro-C-nucleoside analogues of adenosine and inosine have been synthesized. When evaluated in cell culture experiments against human immunodeficiency virus, none of the tested compounds exhibited any significant antiviral effect, while two of them showed some cytotoxicity. (C) 2009 Elsevier Ltd. All rights reserved.