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WILDTYPE CORE-STREPTAVIDIN WITH a conjugated BIOTINYLATED PYRROLIDINEWILDTYPE CORE-STREPTAVIDIN WITH a conjugated BIOTINYLATED PYRROLIDINE
Structural highlights
Function[SAV_STRAV] The biological function of streptavidin is not known. Forms a strong non-covalent specific complex with biotin (one molecule of biotin per subunit of streptavidin). Publication Abstract from PubMedThere has been growing interest in performing organocatalysis within a supramolecular system as a means of controlling reaction reactivity and stereoselectivity. Here, a protein is used as a host for iminium catalysis. A pyrrolidine moiety is covalently linked to biotin and introduced to the protein host streptavidin for organocatalytic activity. Whereas in traditional systems stereoselectivity is largely controlled by the substituents added to the organocatalyst, enantiomeric enrichment by the reported supramolecular system is completely controlled by the host. Also, the yield of the model reaction increases over 10-fold when streptavidin is included. A 1.1 A crystal structure of the protein-catalyst complex and molecular simulations of a key intermediate reveal the chiral scaffold surrounding the organocatalytic reaction site. This work illustrates that proteins can be an excellent supramolecular host for driving stereoselective secondary amine organocatalysis. Reactivity and Selectivity of Iminium Organocatalysis Improved by a Protein Host.,Nodling AR, Swiderek K, Castillo R, Hall JW, Angelastro A, Morrill LC, Jin Y, Tsai YH, Moliner V, Luk LYP Angew Chem Int Ed Engl. 2018 Sep 17;57(38):12478-12482. doi:, 10.1002/anie.201806850. Epub 2018 Aug 23. PMID:30027571[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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