在GABAA受体β2亚单元中的误解变异会破坏受体生物发生,并导致功能丧失
Xi Chen1, Ya-Juan Wang1, Ting-Wei Mu1
1Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA.
bioRxiv : the preprint server for biology
|March 31, 2025
概括
GABRB2基因中的四种相关变异通过破坏蛋白质平衡来损害GABAAR功能. 这些变异导致β2亚单元的错误折叠和降解,影响受体组合和表面表达,这对神经功能至关重要.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 胺黄油酸A型受体 (GABAARs) 是中枢神经系统中的关键抑制道,对正常生理功能至关重要.
- 在GABAAR子单元中的遗传变异与神经系统疾病,包括有关,但潜在的分子机制尚未完全理解.
研究的目的:
- 调查GABAB2基因中的四种误解相关变异 (EAV) 对GABAAR蛋白质稳定和功能的影响.
- 阐明这些变异对病原发生有助的分子机制.
主要方法:
- 在HEK293T细胞中,四种GABRB2β2变体 (Q209F210delinsH,R240T,I246T,I299S) 的外部表达.
- 评估GABA诱导的化物电流以确定受体功能.
- 蛋白质稳定性参数的分析,包括ER保留,亚单元组合,蛋白质稳定性和表面表达.
主要成果:
- 所有四种β2变体都显著降低了GABA诱导的化物峰值电流,表明功能丧失.
- 这些变体表现出不同程度的蛋白质稳定性缺陷,包括增加ER保留,组装受损,稳定性降低和表面表达减少.
- Q209F210delinsH和R240T变种造成了最严重的降解,突出了它们对β2亚单元生物发生的重大影响.
结论:
- 与相关的β2误解变体严重破坏GABAAR蛋白质稳定,导致错误折叠,聚合和过早降解.
- 这些缺陷阻碍了适当的受体组装和流入等离体膜,从而导致的发病.
- 了解这些机制,通过解决贩运缺少GABAAR变体,为遗传性提供了潜在的治疗点.
关键词:
在GABAA受体中,GABAA受体是在GABRB2中,GABRB2是指GABRB2.组装的组装组装的组装.降解降解降解降解降解.细胞内膜网膜的内oplasmic网膜.是一种.折叠 折叠 折叠 折叠错误的意义 变体 变体蛋白质稳定症是一种蛋白质稳定症.走私和贩运的人口贩运更多相关视频
09:34Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
33.4K
05:48Removal of an Internal Translational Start Site from mRNA While Retaining Expression of the Full-Length Protein
Published on: March 16, 2022
2.5K
相关概念视频
Mutations
77.5K
Overview
77.5K
Antiepileptic Drugs: GABAergic Pathway Potentiators
293
γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
293
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.0K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.0K
Incomplete Dominance
20.5K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
20.5K
Nonsense-mediated mRNA Decay
10.4K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
10.4K
Inborn Errors of Metabolism
115
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
115
