γ-Valerolactone (GVL): An eco-friendly anchoring solvent for solid-phase peptide synthesis
作者:Othman Al Musaimi、Ayman El-Faham、Alessandra Basso、Beatriz G. de la Torre、Fernando Albericio
DOI:10.1016/j.tetlet.2019.151058
日期:2019.9
authorities have imposed restrictions to minimize or even stop its use. It has therefore become imperative to identify environmentally benign solvents to replace it. Here we report on a bio derived solvent, γ-valerolactone, for the incorporation of the first aminoacid onto p-alkoxybenzyl alcohol resin in solid-phasepeptidesynthesis. Satisfactory loading values (by a spectrophotometric method) were
Design, synthesis and evaluation of β-lactam antigenic peptide hybrids; unusual opening of the β-lactam ring in acidic media
作者:Marion Tarbe、Itxaso Azcune、Eva Balentová、John J. Miles、Emily E. Edwards、Kim M. Miles、Priscilla Do、Brian M. Baker、Andrew K. Sewell、Jesus M. Aizpurua、Céline Douat-Casassus、Stéphane Quideau
DOI:10.1039/c003877f
日期:——
β-Lactam peptides were envisioned as conformational constraints in antigenic peptides (APs). Three different β-lactam tripeptides of varying flexibility were prepared in solution and incorporated in place of the central part of the altered melanoma associated antigenic peptide Leu27-Melan-A26â35 using solid phase synthesis techniques. Upon TFA cleavage from the solid support, an unexpected opening of the β-lactam ring occurred with conservation of the amide bond. After adaptation of the solid phase synthesis strategy, β-lactam peptides were successfully obtained and both opened and closed forms were evaluated for their capacity to bind to the antigen-presenting class-I MHC HLA-A2 protein system. None of the closed β-lactam peptides bound to HLA-A2, but their opened variants were shown to be moderate to good HLA-A2 ligands, one of them being even capable of stimulating a Melan-A-specific T cell line.
Synthesis, stability and mechanistic studies of potent anticryptococcal hexapeptides
作者:Kitika Shenmar、Krishna K. Sharma、Nishima Wangoo、Indresh K. Maurya、Vinod Kumar、Shabana I. Khan、Melissa R. Jacob、Kulbhushan Tikoo、Rahul Jain
DOI:10.1016/j.ejmech.2017.03.046
日期:2017.5
which has been exploited in the present study by synthesizing a series of hexapeptides that exhibits promising activity against a panel of Gram-negative and Gram-positive bacteria and various pathogenic fungal strains; the most exemplary activity was observed against Cryptococcus neoformans. The peptides 3, 24, 32 and 36 displayed potent anticryptococcalactivity (IC50 = 0.4-0.46 μg/mL, MIC = 0.63-1.25
[EN] BREVICAN-BINDING PEPTIDES FOR BRAIN TUMOR IMAGING<br/>[FR] PEPTIDES DE LIAISON AU BRÉVICAN POUR L'IMAGERIE D'UNE TUMEUR CÉRÉBRALE
申请人:BRIGHAM & WOMENS HOSPITAL INC
公开号:WO2020072491A1
公开(公告)日:2020-04-09
Compositions comprising peptides that bind specifically to BΔg (deglycosylated brevican), and methods of use thereof to deliver therapeutic and diagnostic agents to brevican-expressing cells, e.g., cancerous cells, e.g., brain cancer cells, e.g., glioblastoma cells.
Synthesis and antibacterial studies of teixobactin analogues with non-isostere substitution of enduracididine
作者:Kang Jin、Kathy Hiu Laam Po、Wang Yeuk Kong、Chung Hei Lo、Chun Wah Lo、Ho Yin Lam、Amaya Sirinimal、Jonathan Avraham Reuven、Sheng Chen、Xuechen Li
DOI:10.1016/j.bmc.2018.01.016
日期:2018.3
l-allo-enduracididine (End) residue which is not readily accessible. In this report, we have used convergent Ser Ligation as the key step to prepare a series of teixobactin analogues with End being substituted with its non-isostere moieties. Among these analogues, compounds T16, T27 and T29 exhibited the best antimicrobial activities against different Gram-positive bacteria with MICs ranging from 0.25