Application of 3D NMR for Structure Determination of Peptide Natural Products
作者:Fan Zhang、Navid Adnani、Emmanuel Vazquez-Rivera、Doug R. Braun、Marco Tonelli、David R. Andes、Tim S. Bugni
DOI:10.1021/acs.joc.5b01486
日期:2015.9.4
in NMR, structuredetermination is often slow and constitutes a bottleneck in natural products discovery. Removal of this bottleneck would greatly improve the throughput for antibiotic discovery as well as other therapeutic areas. Overall, faster structure methods for structuredetermination will serve the natural products community in a broad manner. This report describes the first application of
尽管核磁共振技术取得了进步,但结构测定通常很慢,并且构成了天然产物发现的瓶颈。消除这一瓶颈将大大提高抗生素发现以及其他治疗领域的吞吐量。总体而言,用于结构测定的更快的结构方法将以广泛的方式服务于天然产物界。本报告描述了 3D NMR 首次应用于阐明两种具有新颖结构的微生物产生的肽天然产物。这些方法具有成本效益,并且大大提高了对所提出结构的信心。
Octaminomycins A and B, Cyclic Octadepsipeptides Active against <i>Plasmodium falciparum</i>
octadepsipeptides, octaminomycins A (1) and B (2), were isolated from a microbial metabolite fraction library of Streptomyces sp. RK85-270 based on Natural Products Plot screening. Their structures were elucidated on the basis of HRESIMS, 1D and 2D NMR spectroscopic data, and MS/MS experiments for sequence analysis. The absoluteconfigurations of the constituent amino acid residues were determined by a combination
Four new callipeltin A derivatives (N–Q) have been isolated from the Solomon Island marinesponge Asteropus sp. Their structures were established by spectroscopic techniques followed by acid hydrolysis and derivatisation of the free amino acids, and subsequent LCMS analysis of the derivatives. The compounds were evaluated for their activity against cancer cell lines A2058 (melanoma), HT-29 (colorectal
Melicopteline A–E, Unusual Cyclopeptide Alkaloids with Antiviral Activity against Influenza A Virus from <i>Melicope pteleifolia</i>
作者:Ba Wool Lee、Thi Kim Quy Ha、Eun Jin Park、Hyo Moon Cho、Byeol Ryu、Thi Phuong Doan、Hee Ju Lee、Won Keun Oh
DOI:10.1021/acs.joc.0c02137
日期:2021.1.15
Coculture of a Pathogenic Actinomycete and Animal Cells To Produce Nocarjamide, a Cyclic Nonapeptide with Wnt Signal-Activating Effect
作者:Yasumasa Hara、Midori A. Arai、Kazufumi Toume、Hyuma Masu、Tomoyuki Sato、Katsuko Komatsu、Takashi Yaguchi、Masami Ishibashi
DOI:10.1021/acs.orglett.8b02522
日期:2018.9.21
A coculture method with a pathogenic actinomycete of the genus Nocardia and an animal cell line was designed to reconstruct and emulate the initial infection state, and a new cyclic nonapeptide, named nocarjamide (1), was obtained by coculture of Nocardia tenerifensis IFM 10554(T) and the mouse macrophage-like cell line J774.1 in a modified Czapek-Dox medium. Nocarjamide (1) exhibited Wnt signal-activating effects.