Convenient solid-phase synthesis of oligopeptides using pentacoordinated phosphoranes with amino acid residue as building blocks
摘要:
The reactive intermediates of pentacoordinated phosphoranes with amino acids (P(5)-AA) as building blocks, which were obtained by the reaction of O-phenylene phosphorochloridate with N,O-bis(trimethylsilyl)amino acids, were linked to a solid-phase support containing a hydroxymethyl polystyrene functional group. The first amino acid residue was coupled to the solid-phase support after washing the resin with organic solvent. Repeating the procedure led to oligopeptides linked on the resin. A series of free oligopeptides including tetra-Gly, di-Val, tri-Val, di-Leu, di-Phe, and Phe-Leu were obtained after cleavage from solid-phase support. The structure of these oligopeptides were determined by IR, H-1 NMR, FAB-MS, and HPLC. (C) 2003 Elsevier Inc. All rights reserved.
<i>N</i>-Carboxyanhydride-Mediated Fatty Acylation of Amino Acids and Peptides for Functionalization of Protocell Membranes
作者:Enver Cagri Izgu、Anders Björkbom、Neha P. Kamat、Victor S. Lelyveld、Weicheng Zhang、Tony Z. Jia、Jack W. Szostak
DOI:10.1021/jacs.6b08801
日期:2016.12.28
sulfide has been shown to generate short peptides via the formation of cyclic aminoacid N-carboxyanhydrides (NCAs). Here, we show that the polymerization of valine-NCA in the presence of fatty acids yields acylated aminoacids and peptides via a mixed anhydride intermediate. Notably, Nα-oleoylarginine, a product of the reaction between arginine and oleic acid in the presence of valine-NCA, partitions
Mechanism study on the Oligomerization of Amino Acids into Peptides by Phosphorus Trichloride
作者:Wenjie Zhao、Dongxin Zhao、Kui Lu
DOI:10.1080/10426500701807467
日期:2008.1.14
As treated by phosphorustrichloride, amino acids could oligomerize into polypeptides. Based on the results obtained by 31P-NMR and ESI-MS/MS, a possible reaction mechanism was proposed. The mechanism might undergo a penta-coordinated phosphorus intermediat. The activated amino acid was a five-membered cyclic penta-coordinated phosphorus intermediate. The nucleophilic attack of the amino group from
A Novel<scp>L</scp>-Amino Acid Ligase from<i>Bacillus subtilis</i>NBRC3134 Catalyzed Oligopeptide Synthesis
作者:Kuniki KINO、Toshinobu ARAI、Daisuke TATEIWA
DOI:10.1271/bbb.90649
日期:2010.1.23
l-Amino acid ligase catalyzes dipeptide synthesis from unprotected l-amino acids in an ATP-dependent manner. We have purified a new l-amino acid ligase, RizA, which synthesizes dipeptides whose N-terminus is Arg, from Bacillus subtilis NBRC3134, a microorganism that produces a rhizocticin peptide antibiotic. It was suggested that RizA is probably involved in rhizocticin biosynthesis. In this study, we performed sequence analysis of unknown regions around rizA, and newly identified a gene that encodes a protein that possesses an ATP-grasp motif upstream of rizA. This gene was designated rizB, and its recombinant protein was prepared. Recombinant RizB synthesized homo-oligomers of branched-chain l-amino acids and l-methionine consisting of two to five amino acids in an ATP-dependent manner. RizB also synthesized various heteropeptides. Further examination showed that RizB might elongate a peptide chain at the N-terminus. This is the first report on an l-amino acid ligase catalyzing oligopeptide synthesis.
l-氨基酸连接酶以一种 ATP 依赖性方式催化未受保护的 l-氨基酸合成二肽。我们从生产根肿灵多肽抗生素的枯草芽孢杆菌 NBRC3134 中纯化出一种新的 l-氨基酸连接酶 RizA,它能合成 N 端为 Arg 的二肽。有研究认为,RizA 可能参与了根皮素的生物合成。在本研究中,我们对 rizA 周围的未知区域进行了序列分析,新发现了一个编码具有 ATP 抓取基序的蛋白质的基因,该基因位于 rizA 的上游。该基因被命名为 rizB,并制备了其重组蛋白。重组 RizB 以 ATP 依赖性方式合成由 2 至 5 个氨基酸组成的支链 l-氨基酸和 l-蛋氨酸的同源异构体。RizB 还能合成各种杂肽。进一步研究表明,RizB 可能会在 N 端延长肽链。这是首次报道一种催化寡肽合成的 l-氨基酸连接酶。
Homochiral Oligopeptides via a Lattice-Controlled Polymerisation in Racemic Crystals of ValineN-Carboxyanhydride Suspended in Aqueous Solutions
作者:Ran Eliash、Jose G. Nery、Irena Rubinstein、Gilles Clodic、Gérard Bolbach、Isabelle Weissbuch、Meir Lahav
DOI:10.1002/chem.200700994
日期:2007.12.17
mechanism that differs from that of the common solid-state polymerisation in vinyl systems. The topotacticity of the reaction is explained through the operation of a multistep nonlinear process comprising lattice control coupled with an asymmetric induction in the formation of homochiral short peptides followed by their self-assembly into racemic p beta sheets, which operate as efficient templates in the
Characterization of Peptide–Pyrazole Interactions in Solution by Low-Temperature NMR Studies
作者:Wei Wang、Klaus Weisz
DOI:10.1002/chem.200600591
日期:2007.1.12
symmetrically capped on bothsides by two pyrazole receptors to form 2:2 complexes. Amide groups of two neighboring residues in an extended conformation are involved in cyclic hydrogen bonds to the pyrazole. Based on amide chemical shift changes, the relative strength of intermolecular hydrogen bonds can be assessed and correlated with the electronic effects of the substituents on the pyrazole.