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Purine nucleoside phosphorylase - Wikipedia
Nucleoside phosphorylase is an enzyme which cleaves a nucleoside by phosphorylating the ribose to produce a nucleobase and ribose 1 phosphate. It is one enzyme of the nucleotide salvage pathways. These pathways allow the cell to produce nucleotide monophosphates when the de novo synthesis pathway has been interrupted or is non-existent (as is ...
嘌呤核苷磷酸化酶 - 维基百科,自由的百科全书
嘌呤核苷磷酸化酶英語: Purine nucleoside phosphorylase ,简写为PNPase)是参与嘌呤 代谢的一种酶。 嘌呤核苷磷酸化酶可以代谢 腺苷 到 腺嘌呤 , 肌苷 到 次黄嘌呤 , 鸟苷 到 鸟嘌呤 ,并在这些反应中产生 核糖-1-磷酸 。
嘌呤核苷磷酸化酶 - 百度百科
嘌呤核苷磷酸化酶purine nucleoside phosphorylase,简称PNP或PNPase,该酶是嘌呤补救合成合成途径的关键酶之一,广泛存在于原核和真核生物中。 该酶可逆地催化嘌呤核苷磷酸解反应,将底物嘌呤核苷分解成对应的嘌呤碱及核糖-1-磷酸。 在体外反应时,若加入另外一种 嘌呤碱基 或其类似物,可以合成新的嘌呤核苷或类似物,现已广泛用于 微生物酶 法生产核苷类 抗病毒药物,如 阿糖腺苷 、 利巴韦林 等。 按照PNP底物专一性和分子量大小,可以将不同生物来源的PNP分 …
Purine nucleoside phosphorylases: properties, functions, and
The ubiquitous purine nucleoside phosphorylases (PNPs) play a key role in the purine salvage pathway, and PNP deficiency in humans leads to an impairment of T-cell function, usually with no apparent effects on B-cell function. This review updates the properties of the enzymes from eukaryotes and a w …
嘌呤核苷磷酸化酶 - A+医学百科
嘌呤核苷磷酸化酶英语:Purine nucleoside phosphorylase,简写为 PNPase)是参与 嘌呤代谢 的一种酶。 嘌呤核苷磷酸化酶可以 代谢 腺苷 到 腺嘌呤, 肌苷 到 次黄嘌呤, 鸟苷 到 鸟嘌呤,并在这些反应中产生 核糖-5-磷酸。 需要注意的是, PNPase 这一简称还被用于另一个不相关的酶, 多核苷酸磷酸化酶 (Polynucleotide Phosphorylase)。 嘌呤核苷磷酸化酶缺陷型病患会有 免疫缺陷,而只有 免疫系统 中的 T细胞 和 B细胞 不受此缺陷影响。 Markert ML. Purine nucleoside …
Thermophilic nucleoside phosphorylases: Their properties ...
2020年2月1日 · Nucleoside phosphorylases catalyze the reversible phosphorolysis of pyrimidine and purine nucleosides in the presence of phosphate. They are valuable catalysts in the synthesis of nucleosides and their analogues, which are often used as pharmaceuticals or their precursors.
核苷磷酸化酶 - 百度百科
嘌呤核苷磷酸化酶 (英文名称:Purinenucleosidephosphorylase,或简写为PNPase)是参与嘌呤代谢的一种酶。 嘌呤核苷磷酸化酶可以代谢腺苷到腺嘌呤,肌苷到 次黄嘌呤,鸟苷到鸟嘌呤,并在这些反应中产生核糖-5-磷酸。 需要注意的是,PNPase这一简称还被用于另一个不相关的酶, 多核苷酸磷酸化酶 (PolynucleotidePhosphorylase)。 嘌呤核苷磷酸化酶缺陷 型病患会有免疫缺陷,而只有 免疫系统 中的T细胞和B细胞不受此缺陷影响。 以次黄苷+磷酸 次黄嘌呤 +核糖-1-磷 …
Nucleoside Phosphorylase - an overview | ScienceDirect Topics
Nucleoside Phosphorylase is an enzyme that cleaves N-glycosidic bonds in nucleosides, allowing for the salvage of purines and pyrimidines from hosts. AI generated definition based on: Comprehensive Natural Products Chemistry , 1999
Purine nucleoside phosphorylases: properties, functions, and clinical ...
2000年12月1日 · Purine nucleoside phosphorylase (PNP, E.C. 2.4.2.1) catalyzes the cleavage of the glycosidic bond of ribo- and deoxyribonucleosides, in the presence of inorganic orthophosphate (P i) as a second substrate, to generate the purine base and ribose (deoxyribose)-1-phosphate.
Thermophilic nucleoside phosphorylases: Their properties ...
2019年11月9日 · Thermostable nucleoside phosphorylases are promising biocatalysts, as they withstand harsh reaction conditions such as high pH or the addition of organic solvents. In this review, the characteristics and properties of thermostable nucleoside phosphorylases are …