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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Layer-by-layer assembled magnetic bimetallic metal-organic framework composite for global phosphopeptide enrichment
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Layer-by-layer assembled magnetic bimetallic metal-organic framework composite for global phosphopeptide enrichment

机译:逐层组装磁性双金属金属 - 有机框架复合材料,用于全球磷酸富集

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The highly selective enrichment of phosphopeptides is vital for the research of phosphorylated proteomics. Herein, a magnetic bimetallic metal-organic framework (MOF) with Zr-O and Ti-O clusters (denoted as Fe3O4@SiO2@(Zr-Ti-PTA)(15)) has been fabricated using a layer-by-layer assembly approach via the coordination of metal ions with carboxyl groups. The composite has large specific surface area (135.84 m(2)g(-1)) and superparamagnetism (62.03 emu g(-1)). Compared with single-metal cluster MOF, the Fe3O4 @SiO2 @(Zr-Ti-PTA)(15) showed higher binding capacity (100 mgg(-1)), enhanced affinity, better selectivity (n(beta-)(casein) : n(BSA) =1 : 2000) and sensitivity (0.3 fmol/mu L) towards phosphopeptides due to the combination of the dual metal clusters. Furthermore, the Fe3O4@SiO2 @ (Zr-Ti-PTA)is was successfully applied to extracting phosphopeptides from non-fat milk tryptic digest, and 10 monophosphopeptides and 22 multi-phosphopeptides were captured. As a result, 1294 phosphopeptides (476 multi-phosphopeptides and 818 mono-phosphopeptides) were selectively extracted and detected from tryptic digest of rat brain extract, indicating its great application potential in phosphorylated proteomics research. (C) 2019 Elsevier B.V. All rights reserved.
机译:磷酸肽的高度选择性富集对于磷酸化蛋白质组学的研究至关重要。这里,使用逐层组装制造了具有Zr-O和Ti-O簇的磁性双金属 - 有机骨架(MOF)(表示为Fe3O4 @ SiO 2 @(Zr-Ti-PTA)(15))通过用羧基配制金属离子的方法。复合材料具有大的比表面积(135.84m(2)g(-1))和超顺磁性(62.03 emu g(-1))。与单金属簇MOF相比,Fe3O4 @ SiO 2 @(Zr-Ti-PTA)(15)显示较高的粘合能力(100mg(-1)),增强亲和力,更好的选择性(n(beta - )(酪蛋白) :由于双金属簇的组合,N(BSA)= 1:2000)和致磷酸肽的敏感性(0.3Fmol / mu L)。此外,成功地应用Fe 3 O 4 @(Zr-Ti-PTA)以提取来自非脂肪牛奶胰蛋白酶的磷酸肽,并捕获10个单磷肽和22种多磷酸酯。结果,选择性地提取1294种磷酸肽(476种多磷酸酯和818个单磷酸),并从大鼠脑提取物的胰蛋白酶摘要中检测,表明其在磷酸化蛋白质组学研究中的应用潜力。 (c)2019 Elsevier B.v.保留所有权利。

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