Galactose-conjugates of the oseltamivir pharmacophore—new tools for the characterization of influenza virus neuraminidases
作者:Benoit Carbain、Stephen R. Martin、Patrick J. Collins、Peter B. Hitchcock、Hansjörg Streicher
DOI:10.1039/b903394g
日期:——
We describe the synthesis of mimetics of the α2â3 and α2â6 sialogalactoside substrates of influenza neuraminidase which include the oseltamivir pharmacophore, and report the sub-nanomolar affinities for these novel neuraminidase inhibitors. The challenge of synthesizing a Phospha-Oseltamivir/Tamiphosphor monoester involving the secondary 3-hydroxy group of galactose required to mimic the α2â3 sialogalactoside has been overcome by palladium-promoted coupling of the oseltamivir-derived vinyl iodide with a protected galactose-3-phosphonate. The difference in binding of these two inhibitors to a given influenza neuraminidase should be a function of its α2â3/α2â6-selectivity, an important, but not yet fully understood factor in the adaptation of highly pathogenic avian influenza viruses to human hosts.
Rational Design and Synthesis of Methyl-β-<scp>d</scp>-galactomalonyl Phenyl Esters as Potent Galectin-8<i>N</i> Antagonists
作者:Brijesh Patel、Chandan Kishor、Todd. A. Houston、Hadas Shatz-Azoulay、Yehiel Zick、Yaron Vinik、Helen Blanchard
DOI:10.1021/acs.jmedchem.0c00602
日期:2020.10.22
β-galactoside-recognizing protein having an important role in the regulation of bone remodeling and cancer progression and metastasis. Methyl β-d-galactopyranoside malonyl aromatic esters have been designed to target and engage with particular amino acid residues of the galectin-8N extended carbohydrate-binding site. The chemically synthesized compounds had in vitro binding affinity toward galectin-8N
Galectin-8是一种β-半乳糖苷识别蛋白,在调节骨骼重塑以及癌症进展和转移中具有重要作用。已经设计了甲基β- d-吡喃半乳糖苷丙二酰芳族酯以靶向并与galectin- 8N延伸的碳水化合物结合位点的特定氨基酸残基接合。化学合成的化合物对galectin-8 N具有体外结合亲和力通过等温滴定热量法评估,其范围为5–33μM。这种亲和力与化合物抑制SUM159乳腺癌细胞系中galectin-8诱导的趋化因子和促炎细胞因子表达的能力直接相关。X射线晶体结构测定表明,这些单糖基的化合物结合半乳凝素8 Ñ通过接合其独特的精氨酸(Arg59),同时交联到位于横跨糖结合位点的另一精氨酸(Arg45)。这种基于结构的药物设计方法导致了新型单糖半乳糖拮抗剂的发现,其最强结合的化合物(K d 5.72μM)比二糖乳糖紧紧7倍。
Structure-Based Design of a Monosaccharide Ligand Targeting Galectin-8
作者:Mohammad H. Bohari、Xing Yu、Chandan Kishor、Brijesh Patel、Rob Marc Go、Hadieh A. Eslampanah Seyedi、Yaron Vinik、I. Darren Grice、Yehiel Zick、Helen Blanchard
DOI:10.1002/cmdc.201800224
日期:2018.8.20
Galectin‐8 is a β‐galactoside‐recognising protein that has a role in the regulation of bone remodelling and is an emerging new target for tackling diseases with associated bone loss. We have designed and synthesised methyl 3‐O‐[1‐carboxyethyl]‐β‐d‐galactopyranoside (compound 6) as a ligand to target the N‐terminal domain of galectin‐8 (galectin‐8N). Our design involved molecular dynamics (MD) simulations