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Structural and biochemical characterization of the Saccharomyces cerevisiae AMPK homolog SNF1.

机译:酿酒酵母AMPK同源SNF1的结构和生化特性。

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摘要

The 5' AMP-activated protein kinase (AMPK) is a master regulator of energy homeostasis. AMPK is activated by a high AMP:ATP ratio, and functions as a metabolic thermostat. By sensing when energy is low, AMPK can upregulate energy-producing pathways while also downregulating energy-consuming pathways. It helps regulate such pathways as glycolysis, gluconeogenesis, glucose transport, and fatty acid synthesis and oxidation. In addition, AMPK plays a part in controlling food intake. Due to its central role in regulating these processes, AMPK represents a key drug target for both diabetes and obesity. The importance of AMPK is further underscored by its conservation among all eukaryotic organisms; in S. cerevisiae, the AMPK homolog is named SNF1. SNF1 controls many of the same pathways as AMPK.;This thesis describes the structural and functional characterization of SNF1. The structures of the catalytic protein kinase domain, regulatory Bateman2 domain, and heterotrimer core of SNF1 are presented herein. Our studies elucidate important differences between SNF1 and higher eukaryotic AMPKs, especially with regards to AMP activation. In addition, we have provided the first structural insight into several regions of SNF1 important for regulation of protein kinase activity. Finally, we used biochemical experiments to characterize the interface between two regulatory regions of SNF1.
机译:5'AMP激活的蛋白激酶(AMPK)是能量稳态的主要调节剂。 AMPK被高AMP:ATP比激活,并起代谢恒温器的作用。通过感测何时能量不足,AMPK可以上调能量产生途径,同时也下调能量消耗途径。它有助于调节糖酵解,糖异生,葡萄糖转运以及脂肪酸合成和氧化等途径。此外,AMPK在控制食物摄入方面也发挥着作用。由于其在调节这些过程中的核心作用,AMPK代表了糖尿病和肥胖症的关键药物靶标。 AMPK在所有真核生物中的保守性进一步强调了它的重要性。在酿酒酵母中,AMPK同源物被命名为SNF1。 SNF1控制着许多与AMPK相同的途径。本论文描述了SNF1的结构和功能表征。本文介绍了SNF1的催化蛋白激酶结构域,调节性Bateman2结构域和异三聚体核心的结构。我们的研究阐明了SNF1与高等真核AMPK之间的重要区别,特别是在AMP激活方面。此外,我们提供了对SNF1的多个区域的第一个结构见解,这些区域对调节蛋白激酶活性很重要。最后,我们使用生化实验来表征SNF1的两个调控区域之间的接口。

著录项

  • 作者

    Amodeo, Gabriele A.;

  • 作者单位

    Columbia University.;

  • 授予单位 Columbia University.;
  • 学科 Biology Molecular.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 246 p.
  • 总页数 246
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:38:18

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