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Nano-Scaled Layered Inorganic/Protein Hybrids and their Characterization in Biological Activity

机译:纳米缩放的层状无机/蛋白杂种及其在生物活性中的表征

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In this study, α-chymotrypsin (CHT) and bovine serum albumin (BSA) as protein models are successfully intercalated in the galleries of natural layered silicate clay via a simple space-enlarging process. The total protein adsorption by this method was highly enhanced as compared to the bulk surface adsorption of the proteins on clay particles. After the protein intercalation in montmorillonite (MMT) above a critical point, the basal spacing of clay galleries is enlarged from 1.2 nm to 7.2 for CHT and 6.2 nm for BSA, respectively. The expanded free space of the galleries is in agreement with the protein size. The lateral heights of the inorganic/protein hybrids as measured by scanning probe microscopy (dynamic force mode) confirm the intact clay layered structure. The intercalated enzyme exhibits highly preserved catalytic activity in hydrolyzing low molecular weight substrates and selectively rejects the interactions with large biomacromolecules. The results imply that, through the clay accommodation, this simple nano-scaled manipulation of protein function can be highly useful in developing new inorganic/enzyme hybrids for protein therapeutics and tissue engineering.
机译:在该研究中,作为蛋白质模型的α-脉素(CHT)和牛血清白蛋白(BSA)通过简单的空间扩大过程在天然分层硅酸盐粘土的画廊中成功地插入。与粘土颗粒上的蛋白质的散装表面吸附相比,通过该方法的总蛋白质吸附高度增强。在临界点上高于蒙脱石(MMT)的蛋白质嵌入之后,粘土画廊的基础间距分别为BSA的CHT和6.2nm的1.2nm至7.2增大。 GALLERIES的扩展空间与蛋白质大小一致。通过扫描探针显微镜(动态力模式)测量的无机/蛋白杂交体的横向高度确认完整的粘土层状结构。嵌入酶在水解低分子量底物中表现出高度保存的催化活性,并选择性地拒绝与大生物致摩洛族的相互作用。结果意味着,通过粘土的住宿,这种简单的蛋白质功能的简单纳米操纵可以非常有用,可用于开发用于蛋白质治疗和组织工程的新型无机/酶杂交体。

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