189249-10-3Relevant articles and documents
Evidence for a stereoelectronic effect in human oxygen sensing
Loenarz, Christoph,Mecinovic, Jasmin,Chowdhury, Rasheduzzaman,McNeill, Luke A.,Flashman, Emily,Schofield, Christopher J.
, p. 1784 - 1787 (2009)
How PHDs achieve specificity: trans-4-prolyl hydroxylation of the transcription factor HIF occurs with stereochemical retention. Substrate-analogue studies show how the von Hippel Lindau tumor suppressor protein (pVHL) and the oxygen-sensing hydroxylases (PHDs) achieve specificity for hydroxy prolyl/prolyl residues for the C4-exo/endo prolyl conformations, respectively.
Total Synthesis of the Death Cap Toxin Phalloidin: Atropoisomer Selectivity Explained by Molecular-Dynamics Simulations
Yao, Guiyang,Joswig, Jan-Oliver,Keller, Bettina G.,Süssmuth, Roderich D.
supporting information, p. 8030 - 8034 (2019/05/29)
Phallotoxins and amatoxins are a group of prominent peptide toxins produced by the death cap mushroom Amanita phalloides. Phalloidin is a bicyclic cyclopeptide with an unusual tryptathionin thioether bridge. It is a potent stabilizer of filamentous actin and in a fluorescently labeled form widely used as a probe for actin binding. Herein, we report the enantioselective synthesis of the key amino acid (2S,4R)-4,5-dihydroxy-leucine as a basis for the first total synthesis of phalloidin, which was accomplished by two different synthesis strategies. Molecular-dynamics simulations provided insights into the conformational flexibility of peptide intermediates of different reaction strategies and showed that this flexibility is critical for the formation of atropoisomers. By simulating the intermediates, rather than the final product, molecular-dynamics simulations will become a decisive tool in orchestrating the sequence of ring formation reactions of complex cyclic peptides.
The impact of pyrrolidine hydroxylation on the conformation of proline-containing peptides
Taylor, Carol M.,Hardre, Renaud,Edwards, Patrick J. B.
, p. 1306 - 1315 (2007/10/03)
(Chemical Equation Presented) A series of eight dipeptides of the general formula Ac-Phe-Pro*-NHMe was synthesized and the thermodynamics of the cis → trans isomerization about the central amide bond were studied by NMR. Pro* represents the following prol