Applying Small Molecule Microarrays and Resulting Affinity Probe Cocktails for Proteome Profiling of Mammalian Cell Lysates
作者:Haibin Shi、Mahesh Uttamchandani、Shao Q. Yao
DOI:10.1002/asia.201100523
日期:2011.10.4
present in the sample. The brightest microarray hits were converted to affinity‐based probes (AfBPs) using convenient, 1‐step “click” chemistry with benzophenone from the relevant building blocks. Pull‐down/mass spectrometric analysis with these probes (individuals or cocktail) yielded putative protein targets that include well‐known aspartic proteases, such as cathepsin D which is a clear marker for
Homologation of α-amino acids to β-amino acids using Boc<sub>2</sub>O
作者:Ganga-Ramu Vasanthakumar、Basanagoud S. Patil、Vommina V. Suresh Babu
DOI:10.1039/b204652k
日期:——
The use of Boc2O as a coupling agent in the homologation of N-urethane protected-α-amino acid to its β-homomers by the ArndtâEistert method is described. The homologation gives good yields without racemization. The use of Boc2O as a coupling agent not only allows the easy scale up of the process but also it is cost effective.
Cyclic β-Tetra- and Pentapeptides: Synthesis through On-Resin Cyclization and Conformational Studies by X-Ray, NMR and CD Spectroscopy and Theoretical Calculations
作者:Frank Büttner、Anna S. Norgren、Suode Zhang、Samran Prabpai、Palangpon Kongsaeree、Per I. Arvidsson
DOI:10.1002/chem.200500249
日期:2005.10.21
The solution-phase synthesis of the simplest cyclic beta-tetrapeptide, cyclo(beta-Ala)4 (4), as well as the solid-phase syntheses through side chain anchoring and on-resin cyclization of the cyclic beta3-tetrapeptide cyclo(-beta3hPhe-beta3hLeu-beta3hLys-beta3hGln-) (14) and the first cyclic beta3-pentapeptide cyclo(-beta3hVal-beta3hPhe-beta3hLeu-beta3hLys-beta3hLys-) (19) are reported. Extensive computational
Preparation ofN-Fmoc-Protected ?2- and ?3-Amino Acids and their use as building blocks for the solid-phase synthesis of ?-peptides
作者:Gilles Guichard、Stefan Abele、Dieter Seebach
DOI:10.1002/hlca.19980810202
日期:1998.2.4
solid-phase synthesis apparatus using conventional solid-phase peptide synthesis procedures (Scheme 3). In the case of β3-peptides, two methods were used to anchor the first β-amino acid: esterification of the ortho-chlorotrityl chloride resin with the first Fmoc-β-amino acid 2 (Method I, Scheme 2) or acylation of the 4-(benzyloxy)benzyl alcohol resin (Wang resin) with the ketene intermediates from the Wolff
monitor intracellular cathepsin activity and better ascertain their functions under these circumstances. Previous fluorescent activity-based probes (ABPs) that target cathepsins B, L, and S enabled detection of their activity in intact cells as well as non-invasive detection in animal disease models. However, their binding potency is suboptimal compared to the cathepsininhibitor on which they were based