Peptide-mercaptopropionylcysteine (MPA-Cys) thioesters show a surprisingly high reactivity in native chemical ligation (NCL) and allow thiol-additive free reactions. This facilitates sequential NCL reactions and ligation-desulfurization reactions in one-pot formats. The synthetic utility is demonstrated by the synthesis of a SH3 domain.

In the presence of 2-mercaptoethanol peptide-(α)thioesters undergo smooth conversion to their corresponding peptide-(α)carboxylates. This general and operationally simple reaction extends the utility of a promising new strategy for cleaving resin-bound Boc/benzyl-protected peptides without the use of hydrogen fluoride.

A novel ligation method for the synthesis of phosphopeptides and peptides is described, which utilises the inherent reactivity of a peptide bearing an N-terminal phosphoserine or phosphothreonine residue to facilitate amide bond formation with a range of C-terminal peptide thioesters.

The Milstein's reported discovery of hydrogenation thioesters directly toward thiols and alcohols catalyzed by a Ru-acridine complex has been studied here DFT calculations to know the origin different performance depending on nature substituents. Unveiling reaction mechanism leads deeper understanding steric electronic properties limiting step reaction. Steric maps Conceptual have tools rationa...

[formula: see text] [Cu(S,S)-t-Bu-box](OTf)2 (1) catalyzes the enantioselective amination of enolsilanes with azodicarboxylate derivatives. Isomerically pure enolsilanes of aryl ketones, acylpyrroles, and thioesters added to the azo-imide in greater than 95% ee. The use of an alcohol additive was critical to achieving catalyst turnover.

The HIV-1 nucleocapsid protein (NCp7) is a small basic protein with two CysCysHisCys zinc-binding domains that specifically recognizes the Psi-site of the viral RNA. NCp7 plays a number of crucial roles in the viral lifecycle, including reverse transcription and RNA encapsidation. Several classes of potential anti-HIV compounds have been designed to inactivate NCp7 through zinc ejection, includ...

The membrane-bound sn-glycerol-3-phosphate acyltransferase of Escherichia coli was purified to near homogeneity from Triton X-100 extracts of membranes from strain vL3/pvL1 (Lightner, V. A., Larson, T. J., Tailleur, P., Kantor, G. D., Raetz, C. R. H., Bell, R. M., and Modrich, P. (1980) d Biol. Chem. 255, 9413-9420). This strain contains a hybrid plasmid bearing the pZsB gene, a structural gene...