An Allyl Protection and Improved Purification Strategy Enables the Synthesis of Functionalized Phosphonamidate Peptides
作者:Gerhard Klebe、Jonathan Cramer
DOI:10.1055/s-0036-1588393
日期:——
biophysical methods such as isothermal titration calorimetry, high purity of the inhibitor of interest is indispensable. Herein, we describe a procedure for the synthesis and purification of functionalized phosphonamidate peptides that is able to generate inhibitors for the metalloprotease thermolysin for use in biophysical experiments. The method utilizes an allyl ester/alloc protection strategy and
[EN] METHODS AND COMPOSITIONS<br/>[FR] PROCÉDÉS ET COMPOSITIONS
申请人:RES & INNOVATION UK
公开号:WO2020084307A1
公开(公告)日:2020-04-30
The invention relates to genetic incorporation of 2,3-diamino propionic acid (DAP) into polypeptides, to unnatural amino acids comprising DAP, to a tRNA synthetase for charging tRNA with unnatural amino acids comprising DAP, and to methods of using the resulting polypeptides, for example in capturing substrates and/or intermediates in enzymatic reactions. The invention also relates to compounds of formula (I) or (II): or salts, solvates, tautomers, isomers or mixtures thereof.
Among the hapalosin derivatives synthesized, the compounds carrying methyl (5a), methylthioethyl (5d) and phenylmethyl (5e) groups at the C12 position possess only the cis-peptide structure, in contrast to the cases of 5b and 5c. In addition to their conformational stability, the biological activities of the compounds were determined in relation of the P-glycoprotein-mediated MDR-reversing activity
Thioesterase from Cereulide Biosynthesis Is Responsible for Oligomerization and Macrocyclization of a Linear Tetradepsipeptide
作者:Graham W. Heberlig、Christopher N. Boddy
DOI:10.1021/acs.jnatprod.0c00333
日期:2020.6.26
intermediate predicted from canonical activity of CesA and CesB. To differentiatebetween the mechanisms, both tetradepsipeptides were prepared as N-acetyl cysteamine thioesters (SNAC), and the ability of the purified recombinant terminal CesB thioesterase (CesB TE) to oligomerize and macrocyclize each substrate was probed. Only the canonical substrate is converted to cereulide, ruling out the alternative mechanism
Efficient Synthesis of Lactate-Containing Depsipeptides by the Mitsunobu Reaction of Lactates
作者:Tobias Grab、Stefan Bräse
DOI:10.1002/adsc.200404252
日期:2005.11
The Mitsunobureaction has been used as an efficient tool for the synthesis of orthogonally-protected and unprotected depsipeptides such as Boc/Fmoc-L-Lys(Alloc)-D-Ala-D-Lac-OAllyl or L-Lys- D-Ala-D-Lac that are bacterial cell wall precursor analogues found in vancomycin-resistant enterococci.