Bioconjugates of Co(III) complexes with Schiff base ligands and cell penetrating peptides: Solid phase synthesis, characterization and antiproliferative activity
作者:Dariusz Śmiłowicz、Nils Metzler-Nolte
DOI:10.1016/j.jinorgbio.2020.111041
日期:2020.5
tert.-butoxycarbonyl) in axial positions with simultaneous oxidation of Co(II) to Co(III) under ambient environment. All Co(III) complexes were characterized by multinuclear NMR spectroscopy (1H, 13C and 59Co NMR), FT-IR, mass spectrometry and HPLC. The Co(III) complexes were conjugated to three different cell penetrating peptides: FFFF (P1), RRRRRRRRRGAL (P2) and FFFFRRRRRRRRRGAL (P3). Standard solid-phase
Molecularly imprinted cavities template the macrocyclization of tetrapeptides
作者:Dar-Fu Tai、Yee-Fung Lin
DOI:10.1039/b813439a
日期:——
Cavities formed using cyclic tetrapeptides (CTPs) or heat-induced conformers act as templates for cyclization; the cavities bind to linear tetrapeptides and enforce turn conformations to enhance cyclization to constrained CTPs.
Peptide bond formation by aminolysin-A catalysis: A simple approach to enzymatic synthesis of diverse short oligopeptides and biologically active puromycins
peptide bonds to give linear homo-oligopeptides, hetero-dipeptides, and cyclicdipeptides using cost-effective substrates in a one-pot reaction. Aminolysin-A can recognize several C-terminal-modified aminoacids, including the L- and D-forms, as acyl donors as well as free amines, including aminoacids and puromycin aminonucleoside, as acyl acceptors. The absence of aminoacid esters prevents the formation
Biomimetic peptide bond formation in water with aminoacyl phosphate esters
作者:Raj S. Dhiman、Liliana Guevara Opinska、Ronald Kluger
DOI:10.1039/c1ob05660c
日期:——
aminoacyl adenylates, react efficiently with amino acid esters to form dipeptides with retention of stereochemical integrity. The reactions are selective and occur readily in the presence of nucleophiles other than amino groups on their side chains. Aminoacyl phosphate esters that lack an amino-protecting group are also suitable for peptidebondformation, leading to a simplified overall process.
Three different tetraphenylalanine (FFFF) based peptides that differ at the N‐ and C‐termini have been synthesized by using standard procedures to study their ability to form different nanoassemblies under a variety of conditions. The FFFF peptide assembles into nanotubes that show more structural imperfections at the surface than those formed by the diphenylalanine (FF) peptide under the same conditions