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Synthesis of an Intein-mediated Artificial Protein Hydrogel
Published on: January 27, 2014
通过逆水解来触发基的酶触发的自我组装
Sophie Toledano1, Richard J Williams, Vineetha Jayawarna
1School of Materials & Manchester Interdisciplinary Biocentre, The University of Manchester, UK.
Journal of the American Chemical Society
|January 26, 2006
概括
蛋白酶可以通过反向水解触发基凝的自我组装. 这种新的方法为各种应用提供了对水凝形成的精确控制.
科学领域:
- 生物材料科学 生物材料科学
- 超分子化学 超分子化学
- 生物化学 生物化学
背景情况:
- 类水凝是一种先进的生物材料,具有多种应用.
- 控制它们的自组装对于有针对性的功能至关重要.
- 目前用于触发自组装的方法有局限性.
研究的目的:
- 调查蛋白酶用于受控的酸水凝形成的使用.
- 通过逆水解来探索蛋白酶触发的自我组装机制.
- 为了证明这种新方法的选择性和效率.
主要方法:
- 设计和合成对蛋白酶活性敏感的前体.
- 使用特定蛋白酶启动自我组装的酶分析.
- 使用显微镜和风学等技术,对产生的基的表征.
主要成果:
- 蛋白酶选择性地触发了设计的前体的自我组装.
- 反向水解被确定为驱动自组装的关键机制.
- 该过程允许对水凝形成进行空间和时间控制.
结论:
- 通过逆转水解来触发蛋白酶的自我组装是制造基的可行方法.
- 与现有方法相比,这种方法提供了更好的控制和选择性.
- 这些发现为开发复杂的基于的材料开辟了新的途径.
相关概念视频
Hydrolysis
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Enzymes
Inside living organisms, enzymes act as catalysts for many biochemical reactions involved in cellular metabolism. The role of enzymes is to reduce the activation energies of biochemical reactions by forming complexes with its substrates. The lowering of activation energies favor an increase in the rates of biochemical reactions.
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Many viruses self-assemble into a fully functional unit using the infected host cell to...
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Lysosomal Hydrolases
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
Hydrolysis of esters under acidic conditions proceeds through a nucleophilic acyl substitution. In the presence of excess water, the reaction proceeds in a reversible manner, forming carboxylic acids and alcohols.
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
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Amides to Carboxylic Acids: Hydrolysis
Amides can undergo either acid-catalyzed hydrolysis or base-promoted hydrolysis through a typical nucleophilic acyl substitution. Each hydrolysis requires severe conditions.
Acid-catalyzed hydrolysis:
Hydrolysis of amides under acidic conditions yields carboxylic acids. Since the reaction occurs slowly, hydrolysis requires the conditions of heat.
The mechanism begins with the protonation of the carbonyl oxygen by the acid catalyst. The protonation makes the amide carbonyl carbon more...
Acid-catalyzed hydrolysis:
Hydrolysis of amides under acidic conditions yields carboxylic acids. Since the reaction occurs slowly, hydrolysis requires the conditions of heat.
The mechanism begins with the protonation of the carbonyl oxygen by the acid catalyst. The protonation makes the amide carbonyl carbon more...

