Natural and Engineered Biomass Polysaccharide Degrading Nanomachines

天然和工程生物质多糖降解纳米机器

• 批准号: RGPIN-2015-06667
• 负责人: Smith, Steven
• 金额: $ 3.28万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=630050
• 关键词: Natural; Engineered; Biomass; Polysaccharide; Degrading

The sugar components of plant cell walls are one of the richest sources of carbon in Nature. They also represent a vast, largely untapped renewal energy resource for the generation of biofuels, and are particularly attractive since they would otherwise be considered organic compost and thus avoid the "fuel vs. food" debate. The normal breakdown of plant cell walls is the responsibility of bacteria and fungi, which produce biomolecules called enzymes that cut the various bonds in the resident sugars. A subset of bacteria not only produce these enzymes but they assemble them together as a single entity, where they can work together in a cooperative manner to decompose the plant cell wall sugars. This complex has been named the cellulosome. Given how efficient it is at breaking down plant cell wall sugars, there has been substantial interest from industry in harnessing the power of the cellulosome towards the alternative fuel production. To understand why the cellulosome functions so efficiently, we need to have a detailed understanding of the structure of all the components of the cellulosome and how they assembly into a single functional entity. This research program, unique in Canada, uses molecular biological and biochemical approaches to study these structures. Results from these studies will allow us to generate a detailed molecular model of the cellulosome. We will also use this information to create synthetic enzyme complexes that can degrade sugar components of seaweed more efficiently than the individual enzymes. Our findings will advance the basic knowledge of cellulosome system, and of enzyme complexes in general. It will provide valuable information that can be employed in future generation of engineered sugar-degrading systems that can be employed in the use of renewal energy resources in biofuel production. HQP will develop a diverse and comprehensive research skill set with expertise in bioinformatics, molecular and synthetic biology, protein engineering, structural biology, glycobiology, and enzymology.

植物细胞壁的糖成分是自然界中最丰富的碳来源之一。它们还代表了一种巨大的、大部分尚未开发的可再生能源，用于生产生物燃料，而且特别有吸引力，因为它们将被视为有机堆肥，从而避免了“燃料与食物”的争论。植物细胞壁的正常分解是由细菌和真菌负责的，它们产生一种叫做酶的生物分子，这种生物分子可以切断常驻糖中的各种键。细菌的一个子集不仅产生这些酶，而且它们将它们组合在一起作为一个单一的实体，在那里它们可以以合作的方式一起工作，分解植物细胞壁的糖。这种复合物被命名为纤维素。鉴于它在分解植物细胞壁糖方面的效率，工业界对利用纤维素的力量生产替代燃料产生了浓厚的兴趣。为了理解为什么纤维素如此有效地发挥作用，我们需要详细了解纤维素的所有组成部分的结构，以及它们如何组装成一个单一的功能实体。这个研究项目在加拿大是独一无二的，它使用分子生物学和生物化学方法来研究这些结构。这些研究的结果将使我们能够生成纤维素的详细分子模型。我们还将利用这些信息来创造合成酶复合物，它可以比单个酶更有效地降解海藻中的糖成分。我们的发现将促进对纤维素系统和酶复合物的基本认识。它将提供有价值的信息，可用于未来一代的工程糖降解系统，可用于在生物燃料生产中使用可再生能源。HQP将在生物信息学、分子和合成生物学、蛋白质工程、结构生物学、糖生物学和酶学方面发展多样化和全面的研究技能。