875478-11-8Relevant articles and documents
β-Sheet to Helical-Sheet Evolution Induced by Topochemical Polymerization: Cross-α-Amyloid-like Packing in a Pseudoprotein with Gly-Phe-Gly Repeats
Hema, Kuntrapakam,Sureshan, Kana M.
supporting information, p. 8854 - 8859 (2020/04/22)
Protein-mimics are of great interest for their structure, stability, and properties. We are interested in the synthesis of protein-mimics containing triazole linkages as peptide-bond surrogate by topochemical azide-alkyne cycloaddition (TAAC) polymerization of azide- and alkyne-modified peptides. The rationally designed dipeptide N3-CH2CO-Phe-NHCH2CCH (1) crystallized in a parallel β-sheet arrangement and are head-to-tail aligned in a direction perpendicular to the β-sheet-direction. Upon heating, crystals of 1 underwent single-crystal-to-single-crystal polymerization forming a triazole-linked pseudoprotein with Gly-Phe-Gly repeats. During TAAC polymerization, the pseudoprotein evolved as helical chains. These helical chains are laterally assembled by backbone hydrogen bonding in a direction perpendicular to the helical axis to form helical sheets. This interesting helical-sheet orientation in the crystal resembles the cross-α-amyloids, where α-helices are arranged laterally as sheets.
Chemical probes for competitive profiling of the quorum sensing signal synthase PqsD of Pseudomonas aeruginosa
Prothiwa, Michaela,Szamosvári, Dávid,Glasmacher, Sandra,B?ttcher, Thomas
, p. 2784 - 2792 (2017/01/09)
The human pathogen Pseudomonas aeruginosa uses the pqs quorum sensing system to coordinate the production of its broad spectrum of virulence factors to facilitate colonization and infection of its host. Hereby, the enzyme PqsD is a virulence related quoru
Using click chemistry to access mono- and ditopic β-cyclodextrin hosts substituted by chiral amino acids
Tran, Diem Ngan,Blaszkiewicz, Claire,Menuel, Stéphane,Roucoux, Alain,Philippot, Karine,Hapiot, Frédéric,Monflier, Eric
, p. 210 - 218 (2011/03/18)
A wide range of chiral mono- and ditopic cyclodextrin-based receptors have been synthesized by CuI-catalyzed azide-alkyne cycloaddition starting from mono-6-azido-β-cyclodextrin and chiral amino acids. Of interest, microwaves proved very efficient to acce