thymidine 5′-O-mono- and triphosphate were synthesized through CuAAC click reaction of diketone-alkynes with 5-azidomethyl-dUMP or -dUTP. The triphosphates were good substrates for KOD XL DNA polymerase in primer extension synthesis of modified DNA. The nucleotide bearing linear 3,5-dioxohexyl group (HDO) efficiently reacted with arginine-containing peptides to form stable pyrimidine-linked conjugates, whereas
通过二酮-炔烃与 5-叠氮甲基-dUMP 或 -dUTP 的 CuAAC 点击反应合成线性或支链 1,3-二酮连接的胸苷 5'- O-单磷酸和三磷酸。在修饰 DNA 的引物延伸合成中,三磷酸盐是 KOD XL DNA 聚合酶的良好底物。带有线性 3,5-二氧代己基 (HDO) 的核苷酸可与含精氨酸的肽有效反应,形成稳定的嘧啶连接缀合物,而支链 2-乙酰基-3-氧代-丁基 (PDO) 基团则不具有反应性。与赖氨酸或末端氨基反应形成易于水解的烯胺加合物。DNA 中的这种反应性 HDO 修饰用于与含 Arg 的肽或蛋白质(例如组蛋白)进行生物缀合和交联。
Metal Complexes of Peptides. III. The Preparation and Properties of Diammine(oligopeptidato)cobalt(III) Complexes
Complexes of the [Co(tripeptidato)(NH3)2] and NH4[Co(tetrapeptidato)(NH3)2] types (tripeptidato and tetrapeptidato denote the tri- and tetraanions of the coordinating peptides respectively) have been prepared and characterized by means of their electronic, 1H NMR, and circular dichroism (CD) spectral data. In the NH4[Co(tetrapeptidato) (NH3)2] complex, the pep tide coordinates to cobalt(III) as a quadridentate
Gas-Phase Deprotonation of the Peptide Backbone for Tripeptides and Their Methyl Esters with Hydrogen and Methyl Side Chains
作者:Samantha S. Bokatzian-Johnson、Michele L. Stover、David A. Dixon、Carolyn J. Cassady
DOI:10.1021/jp3113528
日期:2012.12.27
deprotonate experimentally by electrospray ionization. Experimental GAs for these esters are in the range of 336.7–338.1 kcal/mol, in excellent agreement with the calculated G3(MP2) values. Experimental GAs could not be obtained for the other three methylesters (AlaGlyAla-OMe, AibAibAib-OMe, and SarSarSar-OMe) because they did not produce sufficient deprotonated molecular ions. Trisarcosine methyl ester
MUTANT PROTEIN HAVING THE PEPTIDE-SYNTHESIZING ACTIVITY
申请人:ABE Isao
公开号:US20070292916A1
公开(公告)日:2007-12-20
The present invention aims at providing an excellent peptide-synthesizing protein and a method for efficiently producing a peptide. The peptide is synthesized by reacting an amine component and a carboxy component in the presence of at least one of proteins shown in the following (I) and (II). (I) The mutant protein having an amino acid sequence comprising one or more mutations from any of the mutations 1 to 68, and the mutations 239 to 290 and 324 to 377 in an amino acid sequence of SEQ ID NO:2. (II) The mutant protein having an amino acid sequence comprising one or more mutations from any of the mutations L1 to L335 and M1 to M642 in an amino acid sequence of SEQ ID NO:208
Mutant protein having the peptide-synthesizing activity
申请人:Abe Isao
公开号:US20070190602A1
公开(公告)日:2007-08-16
The present invention aims at providing an excellent peptide-synthesizing protein and a method for efficiently producing a peptide. The peptide is synthesized by reacting an amine component and a carboxy component in the presence of at least one of proteins shown in the following (I) and (II).
(I) The mutant protein having an amino acid sequence comprising one or more mutations from any of the mutations 1 to 68, and the mutations 239 to 290 and 324 to 377 in an amino acid sequence of SEQ ID NO:2.
(II) The mutant protein having an amino acid sequence comprising one or more mutations from any of the mutations L1 to L335 and M1 to M642 in an amino acid sequence of SEQ ID NO:208
本发明旨在提供一种优异的合成肽蛋白质及高效生产肽的方法。在以下(I)和(II)所示的蛋白质的存在下,通过反应胺组分和羧基组分来合成肽。(I)突变蛋白质的氨基酸序列包括来自突变1到68和突变239到290以及SEQ ID NO:2的氨基酸序列中的突变324到377中的一个或多个突变。(II)突变蛋白质的氨基酸序列包括来自突变L1到L335和M1到M642和SEQ ID NO:208的氨基酸序列中的一个或多个突变。