Identification of CDP-Archaeol Synthase, a Missing Link of Ether Lipid Biosynthesis in Archaea
摘要:
Archaeal membrane lipid composition is distinct from Bacteria and Eukarya, consisting of isoprenoid chains etherified to the glycerol carbons. Biosynthesis of these lipids is poorly understood. Here we identify and characterize the archaeal membrane protein CDP-archaeol synthase (CarS) that catalyzes the transfer of the nucleotide to its specific archaeal lipid substrate, leading to the formation of a CDP-activated precursor (CDP-archaeol) to which polar head groups are attached. The discovery of CarS enabled reconstitution of the entire archaeal lipid biosynthesis pathway in vitro, starting from simple isoprenoid building blocks and using a set of five purified enzymes. The cell free synthetic strategy for archaeal lipids we describe opens opportunity for studies of archaeal lipid biochemistry. Additionally, insights into archaeal lipid biosynthesis reported here allow addressing the evolutionary hypothesis of the lipid divide between Archaea and Bacteria.
Discovery of potent inhibitor for farnesyl pyrophosphate synthase in the mevalonate pathway
作者:Jinbo Gao、Xiusheng Chu、Yongge Qiu、Long Wu、Yuqin Qiao、Jiasheng Wu、Ding Li
DOI:10.1039/c0cc00992j
日期:——
The mevalonate pathway is an important drug target for the treatment of cancer and cardiovascular disease. We synthesized and studied a new type of nitrogen-containing bisphosphonate analogs and developed a sensitive end point assay method for enzyme FPPS, which was used for inhibitor screening. One potent FPPS inhibitor was discovered, and the structure-activity relationship of bisphosphonates for
Mechanistic Investigations of Two Bacterial Diterpene Cyclases: Spiroviolene Synthase and Tsukubadiene Synthase
作者:Patrick Rabe、Jan Rinkel、Etilia Dolja、Thomas Schmitz、Britta Nubbemeyer、T. Hoang Luu、Jeroen S. Dickschat
DOI:10.1002/anie.201612439
日期:2017.3.1
two diterpene cyclases from streptomycetes—one with an unknown product that was identified as the spirocyclic hydrocarbon spiroviolene and one with the known product tsukubadiene—were investigated in detail by isotope labeling experiments. Although the structures of the products were very different, the cyclization mechanisms of both enzymes proceed through the same initial cyclizationreactions, before
Two Diterpene Synthases from
<i>Chryseobacterium</i>
: Chryseodiene Synthase and Wanjudiene Synthase
作者:Lukas Lauterbach、Bernd Goldfuss、Jeroen S. Dickschat
DOI:10.1002/anie.202004691
日期:2020.7.13
Twobacterialditerpenesynthases (DTSs) from Chryseobacterium were characterised. The first enzyme yielded the new compound chryseodiene that closely resembles the known fusicoccane diterpenes from fungi, but its experimentally and computationally studied cyclisation mechanism is fundamentally different to the mechanism of fusicoccadiene synthase. The second enzyme produced wanjudiene, a diterpene
Mevalonate 5-diphosphate mediates ATP binding to the mevalonate diphosphate decarboxylase from the bacterial pathogen Enterococcus faecalis
作者:Chun-Liang Chen、James C. Mermoud、Lake N. Paul、Calvin Nicklaus Steussy、Cynthia V. Stauffacher
DOI:10.1074/jbc.m117.802223
日期:2017.12
structural studies on the mevalonate diphosphate decarboxylasefrom E. faecalis (MDDEF). The MDDEF crystal structure in complex with ATP (MDDEF-ATP) revealed that the phosphate-binding loop (amino acids 97-105) is not involved in ATP binding and that the phosphate tail of ATP in this structure is in an outward-facing position pointing away from the active site. This suggested that binding of MDDEF to MVAPP
甲羟戊酸途径产生异戊烯二磷酸 (IPP),它是聚异戊二烯合成的组成部分,是人类细菌病原体粪肠球菌生长的关键途径。该途径中的最终酶,甲羟戊酸二磷酸脱羧酶 (MDD),作用于甲羟戊酸二磷酸 ( MVAPP) 在消耗 ATP 的同时产生 IPP。这种必需酶已被建议作为治疗耐药细菌感染的治疗靶点。在这里,我们报告了来自粪肠球菌 (MDDEF) 的甲羟戊酸二磷酸脱羧酶的功能和结构研究。与 ATP 复合的 MDDEF 晶体结构 (MDDEF-ATP) 显示磷酸盐结合环(氨基酸 97-105)不参与 ATP 结合,并且该结构中 ATP 的磷酸盐尾部处于朝外的位置指向远离活动站点。这表明 MDDEF 与 MVAPP 的结合对于引导 ATP 进入有利的催化位置是必要的。酶学实验表明,MDDEF 以 MVAPP 作为第一底物进行连续有序的双底物反应,这与等温滴定量热法 (ITC) 实验一致。在 ITC 结果的基础上,我们提出
A Facile Cell Free Synthesis of Isotopically Labeled (E)-4-Hydroxy-3-methylbut-2-enyl Diphosphate, a Precursor of the Plant Hormone Zeatin
作者:Maja Raschke、Monika Fellermeier、Meinhart H. Zenk
DOI:10.1002/hlca.200590116
日期:2005.6
(E)-4-Hydroxy-3-methylbut-2-enyldiphosphate (1) is a key intermediate of the deoxyxylulose phosphate pathway of isoprenoid biosynthesis and a precursor of the planthormonezeatin. The availability of this intermediate with various labeling patterns is pivotal for its use in biosynthetic studies. The number of positions, however, that can be easily labeled by chemical synthesis is limited, and the