IMPRINTED POLYMERS WITH AFFINITY FOR PHOSPHORYLATED PEPTIDES AND PROTEINS
申请人:Sellergren Borje
公开号:US20110015373A1
公开(公告)日:2011-01-20
The present invention relates to a method of separating or extracting phosphorylated amino acids, peptides or proteins with a molecularly imprinted polymer and to the preparation of said molecularly imprinted polymer as well as use of a molecularly imprinted polymer for separating or extracting phosphorylated amino acids, peptides or proteins.
Phosphoserine Lyase Deoxyribozymes: DNA-Catalyzed Formation of Dehydroalanine Residues in Peptides
作者:Jagadeeswaran Chandrasekar、Adam C. Wylder、Scott K. Silverman
DOI:10.1021/jacs.5b06308
日期:2015.8.5
introducing Dha into peptides have substantial limitations. Using in vitro selection, here we show that DNA can catalyze Zn(2+) or Zn(2+)/Mn(2+)-dependent formation of Dha from phosphoserine (pSer), i.e., exhibit pSer lyase activity, a fundamentally new DNA-catalyzed reaction. Two new pSer lyase deoxyribozymes, named Dha-forming deoxyribozymes 1 and 2 (DhaDz1 and DhaDz2), each function with multiple turnover
脱氢丙氨酸 (Dha) 是一种非蛋白质亲电氨基酸,是几种生物活性环肽(如羊毛硫抗生素、硫肽和微囊藻毒素)生物合成中的合成中间体或产物。Dha 还能够标记蛋白质和合成翻译后修饰的蛋白质及其类似物。然而,目前将 Dha 引入肽的化学方法有很大的局限性。使用体外选择,我们在这里表明 DNA 可以催化 Zn(2+) 或 Zn(2+)/Mn(2+) 依赖的 Dha 从磷酸丝氨酸 (pSer) 形成,即表现出 pSer 裂解酶活性,这是一种全新的DNA催化反应。两种新的 pSer 裂解酶脱氧核酶,命名为 Dha 形成脱氧核酶 1 和 2(DhaDz1 和 DhaDz2),每种功能在选择期间使用的模型六肽底物上具有多重转换。使用 DhaDz1,我们从不相关的线性 13 聚体肽中的 pSer 生成 Dha。随后碱基促进的同型半胱氨酸分子内环化成 Dha,形成了补体抑制剂坎普他汀的稳定胱硫醚(硫醚)类似物。这些发现确立了
Synthesis and bioactivity of pyrrole-conjugated phosphopeptides
作者:Qiuxin Zhang、Weiyi Tan、Bing Xu
DOI:10.3762/bjoc.18.17
日期:——
Here we report the synthesis and effect on the cell viability of pyrrole-conjugated phosphopeptides. Encouraged by the selective inhibition of cancer cells by a naphthyl-capped phosphopeptide (Nap-ffpy, 1), we conjugated the heteroaromatic dipyrrole or tripyrrole motif at the N-terminal of short peptides containing phosphotyrosine or phosphoserine and examined the bioactivity of the resulting phosphopeptides
在这里,我们报告了吡咯缀合磷酸肽的合成及其对细胞活力的影响。受萘基磷酸肽 (Nap-ff p y, 1 ) 对癌细胞选择性抑制的启发,我们将杂芳族二吡咯或三吡咯基序缀合在含有磷酸酪氨酸或磷酸丝氨酸的短肽的 N 端,并检查了其生物活性。产生的磷酸肽 ( 2 – 10 )。虽然大多数磷酸肽在 200 μM 下表现出与1相比对 HeLa 细胞的活性,但与1不同,它们在 400 μM 下与 HeLa 细胞基本上相容。 400 μM 的2 – 10酶促去磷酸化无法诱导在1的情况下观察到的肽组装体的显着形态转变。这些结果表明,肽N端的杂芳族基序可能不利于酶促自组装过程中广泛纳米纤维的形成或形态变化,从而为开发磷酸肽作为控制细胞命运的磷酸酶底物提供了有用的见解。
Investigating the Role of Amino Acids in Short Peptides for Hydroxyapatite Binding and Osteogenic Differentiation of Mesenchymal Stem Cells to Aid Bone Regeneration
biomineralization of bone tissues and promote bone formation. In this article, we have demonstrated the potential of six tetrapeptides for specific binding to hydroxyapatite (HAp), a major inorganic component of the bone, and their effect on the growth and osteogenicdifferentiation of mesenchymalstemcells (MSCs). We adopted a simplistic approach of rationally designing amphiphilic peptides by incorporating