Investigating the partitioning of glucose to lipids versus respiration, an undergraduate-based approach to dissect a pivotal point of metabolic control
研究葡萄糖与脂质与呼吸的分配,这是一种基于本科生的方法来剖析代谢控制的关键点
基本信息
- 批准号:10114867
- 负责人:
- 金额:$ 43.76万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2012
- 资助国家:美国
- 起止时间:2012-03-01 至 2024-08-31
- 项目状态:已结题
- 来源:
- 关键词:Animal ModelAnimalsBindingBinding ProteinsBiochemical GeneticsBiogenesisBiomedical ResearchCardiovascular DiseasesCause of DeathCell LineCell RespirationCellsChIP-seqClustered Regularly Interspaced Short Palindromic RepeatsCoronary heart diseaseDevelopmentDiabetes MellitusDietDiseaseFamilial HypercholesterolemiaFatty acid glycerol estersFatty-acid synthaseGeneticGenetic TranscriptionGlucoseGoalsHepaticHigh Fat DietHumanHyperlipidemiaInsulinKnock-outLipidsLiverMalignant NeoplasmsMammalian CellMessenger RNAMetabolicMetabolic ControlMetabolic DiseasesMetabolic PathwayMetabolismMethodsMitochondriaMolecularMusMutationMyocardial InfarctionNeurodegenerative DisordersNon-Insulin-Dependent Diabetes MellitusPancreasPathway interactionsPhosphorylationPhosphorylation InhibitionProductionProtein-Serine-Threonine KinasesProteinsRegulationResearchResistanceResource AllocationResourcesRespirationRisk FactorsSCA2 proteinSaccharomyces cerevisiaeSmall Interfering RNAStrokeSystemTechniquesTrainingTriglyceridesUSF1 geneUnited StatesYeastsbasebiochemical toolscardiovascular risk factorhuman diseaseknock-downlipid biosynthesismetabolic ratenovelphosphatidylinositol 3&apos-kinase-associated serine kinaserespiration regulationrespiratorystress granulesugartooltranscription factorundergraduate studentyeast geneticsyeast two hybrid system
项目摘要
ABSTRACT
A pivotal point in cellular resource allocation is the point at which glycolytic intermediates are
partitioned to lipid biosynthesis versus respiration. For example, hyperlipidemia occurs when
cells favor lipid biogenesis and is a major risk factor for cardiovascular disease (CVD) including
coronary heart disease, heart attack and stroke, the number one causes of death in the United
States. PAS kinase is a serine-threonine protein kinase that is a key regulator of this pivotal
point in glucose allocation. PAS kinase-deficient mice (PASK-/-) placed on a high-fat diet or a
high-fat high-sugar diet are resistant to liver triglyceride accumulation and display increased
whole animal as well as cellular respiration rates when compared to their wild type littermates.
Liver triglyceride accumulation and altered metabolic rate are two primary risk factors in the
development of CVD as well as related diseases such as type II diabetes. We have recently
identified two PAS kinase substrates that may explain its regulation of this pivotal point in
metabolism, upstream stimulatory factor 1 (USF1) and Ataxin-2. Our hypothesis is that PAS
kinase regulates the pivotal point of partitioning glucose to lipid versus respiratory pathways
through phosphorylation of its substrates USF1 and Ataxin-2. USF1 is a transcription factor that
directly regulates fatty acid synthase and human mutations in USF1 are associated with familial
hypercholesterolemia. PAS kinase phosphorylates and inhibits USF1 in yeast. This
phosphorylation leads to decreased respiration and increased lipid biosynthesis. Ataxin-2, on
the other hand, associates with and sequesters mRNA and proteins to stress granules,
regulating cellular metabolism through their inhibition. PAS kinase-dependent phosphorylation
of Ataxin-2 activates the protein by increasing its localization to stress granules in yeast. The
focus of this proposal is to further characterize the effects of PAS kinase-dependent
phosphorylation on the function of USF1 and Ataxin-2 in yeast and mammalian systems. Our
long term goal is to increase our understanding of the regulation of central metabolism while
training undergraduates in scientific research, thereby identifying novel targets for the treatment
of metabolic disease. Throughout this proposal we will use the genetic and biochemical tools of
yeast to investigate diseases for which most undergraduates have a personal connection to,
namely hyperlipidemia and diabetes.
抽象的
细胞资源分配的关键点是糖酵解中间体的点
分为脂质生物合成与呼吸。 例如,高脂血症发生在以下情况:
细胞有利于脂质生物发生,是心血管疾病 (CVD) 的主要危险因素,包括
冠心病、心脏病发作和中风是美国第一大死因
国家。 PAS 激酶是一种丝氨酸-苏氨酸蛋白激酶,是这一关键蛋白的关键调节因子
葡萄糖分配点。 PAS 激酶缺陷小鼠 (PASK-/-) 接受高脂肪饮食或
高脂肪高糖饮食可抵抗肝脏甘油三酯的积累并显示增加
与野生型同窝动物相比,整个动物以及细胞呼吸速率。
肝脏甘油三酯积累和代谢率改变是两个主要危险因素
CVD 以及相关疾病(例如 II 型糖尿病)的发展。 我们最近有
确定了两种 PAS 激酶底物,可以解释其对这一关键点的调节
新陈代谢、上游刺激因子 1 (USF1) 和 Ataxin-2。 我们的假设是 PAS
激酶调节将葡萄糖分配给脂质与呼吸途径的关键点
通过其底物 USF1 和 Ataxin-2 的磷酸化。 USF1 是一种转录因子
直接调节脂肪酸合酶,USF1 中的人类突变与家族性相关
高胆固醇血症。 PAS 激酶磷酸化并抑制酵母中的 USF1。 这
磷酸化导致呼吸减少和脂质生物合成增加。 Ataxin-2,上
另一方面,与应激颗粒结合并隔离 mRNA 和蛋白质,
通过抑制来调节细胞代谢。 PAS 激酶依赖性磷酸化
Ataxin-2 通过增加其在酵母中应激颗粒的定位来激活蛋白质。 这
该提案的重点是进一步表征 PAS 激酶依赖性的影响
磷酸化对酵母和哺乳动物系统中 USF1 和 Ataxin-2 功能的影响。 我们的
长期目标是增加我们对中枢代谢调节的理解,同时
对本科生进行科学研究培训,从而确定新的治疗目标
代谢疾病。 在整个提案中,我们将使用遗传和生化工具
酵母来研究与大多数本科生有个人联系的疾病,
即高脂血症和糖尿病。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Julianne H. Grose其他文献
Julianne H. Grose的其他文献
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{{ truncateString('Julianne H. Grose', 18)}}的其他基金
Molecular mechanisms of yeast PAS kinase regulation and function.
酵母 PAS 激酶调节和功能的分子机制。
- 批准号:
8232500 - 财政年份:2012
- 资助金额:
$ 43.76万 - 项目类别:
Investigating the regulation of central metabolism as key to human health and disorders through the association of PASK, USF1 and ATXN2 with phenotypes and disorders in the All of Us database
通过 PASK、USF1 和 ATXN2 与 All of Us 数据库中表型和疾病的关联,研究中枢代谢的调节作为人类健康和疾病的关键
- 批准号:
10658609 - 财政年份:2012
- 资助金额:
$ 43.76万 - 项目类别:
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