Identification of the Formycin A Biosynthetic Gene Cluster from <i>Streptomyces kaniharaensis</i> Illustrates the Interplay between Biological Pyrazolopyrimidine Formation and <i>de Novo</i> Purine Biosynthesis
作者:Shao-An Wang、Yeonjin Ko、Jia Zeng、Yujie Geng、Daan Ren、Yasushi Ogasawara、Seema Irani、Yan Zhang、Hung-wen Liu
DOI:10.1021/jacs.9b00241
日期:2019.4.17
cosmid is identified from the Streptomyces kaniharaensis genome library that contains the for gene cluster responsible for the biosynthesis of formycin. Subsequent gene deletion experiments and in vitro characterization of the forBCH gene products established their catalytic functions in formycin biosynthesis. Results also demonstrated that PurH fromdenovo purine biosynthesis plays a key role in pyrazolopyrimidine
Formycin A 是一种有效的嘌呤核苷抗生素,在核糖基部分和吡唑并嘧啶碱基之间具有 C-糖苷键。在此,从卡尼哈拉链霉菌基因组文库中鉴定出粘粒,其含有负责福霉素生物合成的基因簇。随后的基因缺失实验和 forBCH 基因产物的体外表征确定了它们在福霉素生物合成中的催化功能。结果还表明,来自嘌呤从头生物合成的 PurH 在福霉素 A 生物合成过程中吡唑并嘧啶的形成中起着关键作用。PurH 在这两种途径中的参与代表了初级和次级代谢如何相互关联的一个很好的例子。
Evaluation of the Catalytic Mechanism of AICAR Transformylase by pH-Dependent Kinetics, Mutagenesis, and Quantum Chemical Calculations
作者:Jae Hoon Shim、Mark Wall、Stephen J. Benkovic、Natalia Díaz、Dimas Suárez、Kenneth M. Merz
DOI:10.1021/ja010014k
日期:2001.5.1
the free base form. An alternative pathway was suggested by modeling Lys266 to have a hydrogen-bonding interaction with the N3 of the imidazole of AICAR. Lys266 has been implicated in catalysisbased on mutagenesis studies and the recent X-ray structure of AICAR Tfase. The quantum chemical calculations on a model system that contains AICA complexed with CH3NH3+ as a mimic of the Lys residue confirmed
Buchanan, E.Chargaff,J.N.Davidson,The Nucleic Acids,Bd.3<New York 1960> 303,306
作者:Buchanan
DOI:——
日期:——
Pathway Analysis of Cell Culture Phenotypes and Uses Thereof
申请人:Melville Mark
公开号:US20090186358A1
公开(公告)日:2009-07-23
The present invention provides methods for systematically identifying genes, proteins and/or related pathways that regulate or indicative of cell phenotypes. The present invention further provides methods for manipulating the identified genes, proteins and/or pathways to engineer improved cell lines and/or to evaluate or select cell lines with desirable phenotypes.
Flaks et al., Journal of Biological Chemistry, 1957, vol. 229, p. 603,605