FUNCTIONAL STUDY OF ADP-GLUCOSE PYROPHOSPHORYLASE

ADP-葡萄糖焦磷酸酶的功能研究

• 批准号: 8362108
• 负责人: IRIMPAN I MATHEWS
• 金额: $ 0.44万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-03-01 至 2012-02-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8362108
• 关键词: Anabolism; Bacteria; Binding; Carbon; Environment; Funding; Glucose; Glucose-1-phosphate adenylyltransferase; Glycogen; Grant; National Center for Research Resources; Organism; Pathway interactions; Plants; Polysaccharides; Principal Investigator; Radiation; Reaction; Regulation; Research; Research Infrastructure; Resources; Site; Source; Starch; Starvation; United States National Institutes of Health; coping; cost; insight; structural biology

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. ADP-glucose pyrophosphorylase catalyzes the first rate-limiting step in starch biosynthesis in plants and glycogen biosynthesis in bacteria. It is the enzymatic site for regulation of storage polysaccharide accumulation in plants and bacteria, being allosterically activated or inhibited by metabolites. The accumulation of alpah-1,4-polyglucans is an important strategy to cope with transient starvation conditions in the environment. In bacteria and plants, the synthesis of glycogen and starch occurs by utilizing ADP-glucose as the glucosyl donor for elongation of the alpha-1,4-glucosidic chain. The main regulatory step takes place at the level of ADP-glucose synthesis, a reaction catalyzed by ADP-Glc pyrophosphorylase (PPase). Most of the ADP-Glc PPases are allosterically regulated by intermediates of the major carbon assimilatory pathway in the organism. ADP-Glc PPase bound with various compounds will be crystallized and structural studies will be performed to gain structural and functional insight.

该副本是利用资源的众多研究子项目之一 由NIH/NCRR资助的中心赠款提供。对该子弹的主要支持 而且，副投影的主要研究员可能是其他来源提供的 包括其他NIH来源。 列出的总费用可能 代表subproject使用的中心基础架构的估计量， NCRR赠款不直接向子弹或副本人员提供的直接资金。 ADP-葡萄糖焦磷酸化酶催化植物中淀粉生物合成和细菌糖原生物合成的第一次限制步骤。 它是调节储存多糖在植物和细菌中积累的酶位，被代谢物被变构激活或抑制。 ALPAH-1,4-聚葡聚糖的积累是应对环境中短暂饥饿条件的重要策略。在细菌和植物中，糖原和淀粉的合成是通过利用ADP-葡萄糖作为葡萄糖基供体来伸长alpha-1,4-葡萄糖苷链的。 主要的调节步骤发生在ADP-葡萄糖合成水平上，这是由ADP-GLC焦磷酸化酶（PPase）催化的反应。 大多数ADP-GLC PPases在生物体中主要碳同化途径的中间体对变构调节。 与各种化合物结合的ADP-GLC PPase将结晶，并将进行结构研究以获得结构和功能洞察力。