Exploring a Multivalent Approach to α-<scp>L</scp>-Fucosidase Inhibition
作者:Elena Moreno-Clavijo、Ana T. Carmona、Antonio J. Moreno-Vargas、Lidia Molina、Daniel W. Wright、Gideon J. Davies、Inmaculada Robina
DOI:10.1002/ejoc.201300878
日期:2013.11
To probe the utility of a multivalentapproach for fucosidase inhibition, a series of di- and tri-valent imino sugars based on L-fuco-configured 1,4-imino- and 1,4-bis(imino)-cyclitol epitopes has been synthesized and analyzed for fucosidase inhibition with the best trivalent species yielding a modest improvement in binding constant. Structural analysis of a representative pair of mono- and tri-valent
为了探索多价方法抑制岩藻糖苷酶的效用,一系列基于 L-岩藻糖配置的 1,4-亚氨基和 1,4-双(亚氨基)-环醇表位的二价和三价亚氨基糖已被研究用最好的三价物种合成并分析岩藻糖苷酶抑制,产生适度改善的结合常数。已对细菌岩藻糖苷酶 BtFuc2970 进行了一对代表性单价和三价亚氨基糖的结构分析。3D 结构显示亚氨基环醇在 3E 构象中的结合,与岩藻糖苷酶作用的已知途径一致。
Self-Assembly of One- and Two-Dimensional Hemoprotein Systems by Polymerization through Heme-Heme Pocket Interactions
Supramolecular protein polymers: When a heme moiety was introduced to the surface of an apo‐cytochrome b562(H63C) mutant, supramolecular polymers formed through noncovalent heme–hemepocketinteractions. The incorporation of a heme triad as a pivot molecule in the protein polymer further led to a two‐dimensional protein network structure, which was visualized by tapping‐mode atomic force microscopy
Synthesis and Conformational Analysis of Novel Trimeric Maleimide Cross-Linking Reagents
作者:Agnieszka Szczepanska、José Luis Espartero、Antonio J. Moreno-Vargas、Ana T. Carmona、Inmaculada Robina、Sarah Remmert、Carol Parish
DOI:10.1021/jo0709293
日期:2007.8.31
Nine homotrifunctional cross-linking reagents are presented. Their synthesis and chemical properties as well as their characterization by classical mechanical conformational searching techniques is reported. Mixed Low Mode and Monte Carlo searching techniques were used to exhaustively sample the OPLS2005/GBSA(water) potential energy surface of trisubstituted cyclohexane and benzene derivatives of C3 symmetry. Geometric structure, molecular length, and hydrogen-bonding patterns were analyzed. Nonaromatic compounds exhibited exclusively chair conformations at low energies, with a preference for axial or equatorial arms depending upon the presence of additional ring substituent Me groups. Increasing chain length often resulted in overall shorter molecular length due to additional chain flexibility. These results were consistent with one- and two-dimensional temperature-dependent NMR studies.
Synthesis and anti-HIV activity of trivalent CD4-mimetic miniproteins
作者:Hengguang Li、Yongjun Guan、Agnieszka Szczepanska、Antonio J. Moreno-Vargas、Ana T. Carmona、Inmaculada Robina、George K. Lewis、Lai-Xi Wang
DOI:10.1016/j.bmc.2007.03.064
日期:2007.6
A series of trivalent CD4-mimetic miniproteins was synthesized, in which three CD4M9 miniprotein moieties were tethered on a threefold-symmetric scaffold. The trivalent miniproteins were designed to target the CD4-binding sites displayed in the trimeric gp120 complex of HIV-1. The synthesis takes advantage of the highly efficient ligation between a cysteine-tagged CD4M9 miniprotein and a suitable trivalent maleimide that varied in the nature and length of spacer. Antiviral assay revealed that most of the synthetic trivalent miniproteins demonstrated significantly enhanced anti-HIV activities over the monomeric CD4M9 against both R5- and X4-tropic viruses, indicating the beneficial multivalent effects. One compound that possesses a hydrophobic linker was shown to be 140-fold more active than CD4M9 against HIV-1 (Bal) infection, implicating a positive contribution of the lipid portion to the antiviral activity. It was also found that most of the trivalent miniproteins showed comparable anti-HIV activities in comparison with a typical bivalent miniprotein, regardless of the length of the linker. The results implicate a novel mechanism of the interactions between the multivalent inhibitors and the trimeric gpl20 complex. (C) 2007 Elsevier Ltd. All rights reserved.
Versatile<i>C</i><sub>3</sub>-symmetric scaffolds and their use for covalent stabilization of the foldon trimer
作者:Arne Berthelmann、Johannes Lach、Melissa A. Gräwert、Michael Groll、Jutta Eichler
DOI:10.1039/c3ob42251h
日期:——
Attachment of foldon monomers to a trimesic acid scaffold enhances thermal stability of the trimer, while maintaining the correct fold.