[reaction: see text] Naturally occurring phosphoinositide glycoconjugates are equipped with varied acyl residues that are important for their biological activity and biosynthesis. This paper reports that acylation at O2 of the myo-inositol moiety can be achieved by stereocontrolled ortho ester rearrangement. Coupling to homo- or heterodiacylated glycerols was achieved via phosphoramidite methods, and exhaustive debenzylation by transfer hydrogenation afforded the deprotected phosphoglyceroinositides. The latter can be kept in chloroform solution at room temperature for over two months without migration of the inositol acyl group.
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http://dx.doi.org/10.1021/ol0202161 | DOI Listing |
Appl Microbiol Biotechnol
December 2024
Life Sciences and Bioengineering Center, Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA.
Transcriptomics is a powerful approach for functional genomics and systems biology, yet it can also be used for genetic part discovery. Here, we derive constitutive and light-regulated promoters directly from transcriptomics data of the basidiomycete red yeast Xanthophyllomyces dendrorhous CBS 6938 (anamorph Phaffia rhodozyma) and use these promoters with other genetic elements to create a modular synthetic biology parts collection for this organism. X.
View Article and Find Full Text PDFJ Nat Prod
December 2024
Anti-infective Agent Creation Engineering Research Centre of Sichuan Province, School of Pharmacy, Chengdu University, Chengdu 610106, China.
The first total syntheses of four isoflavone glucosides, tectoridin (), tectoridin A (), tectorigenin 7--β-d-glucopyranosyl-12--β-d-glucopyranoside (), and isotectroigenin 7--β-d-glucopyranoside (), have been accomplished. Key steps in our synthetic approach include a regioselective halogenation reaction, followed by methanolysis to introduce the -OCH group into isoflavone frameworks and a PTC-promoted stereoselective glycosidation to establish glycosidic bonds. The synthesized isoflavone glucosides (-) and their corresponding aglycones ( and ) were evaluated for anti-inflammatory activity against nitric oxide (NO), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-1 β (IL-1β) in lipopolysaccharide (LPS)-induced RAW264.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122 Jiangsu, China.
Nanometric solid solution alloys are utilized in a broad range of fields, including catalysis, energy storage, medical application, and sensor technology. Unfortunately, the synthesis of these alloys becomes increasingly challenging as the disparity between the metal elements grows, due to differences in atomic sizes, melting points, and chemical affinities. This study utilized a data-driven approach incorporating sample balancing enhancement techniques and multilayer perceptron (MLP) algorithms to improve the model's ability to handle imbalanced data, significantly boosting the efficiency of experimental parameter optimization.
View Article and Find Full Text PDFMalays J Pathol
December 2024
Universiti Sains Malaysia, School of Dental Sciences, Health Campus, Kubang Kerian, Kelantan, Malaysia.
Introduction: Oral cancer is considered the sixth most common form of cancer worldwide. It causes significant morbidity and mortality, especially in low socioeconomic status groups. However, Cancer chemoprevention encompasses the use of specific compounds to suppress the growth of tumours or inhibit carcinogenesis.
View Article and Find Full Text PDFAdv Sci (Weinh)
December 2024
Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea.
The biobased production of chemicals is essential for advancing a sustainable chemical industry. 1,5-Pentanediol (1,5-PDO), a five-carbon diol with considerable industrial relevance, has shown limited microbial production efficiency until now. This study presents the development and optimization of a microbial system to produce 1,5-PDO from glucose in Corynebacterium glutamicum via the l-lysine-derived pathway.
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