相关实验视频

Updated: Feb 4, 2026

Functional Characterization of Endogenously Expressed Human RYR1 Variants

Functional Characterization of Endogenously Expressed Human RYR1 Variants

Published on: June 9, 2021

人类氨酸-氨酸变异的病原性功能和结构性表征

Nirav Modha^1,2, Emil Alexov^3,1,2,4

¹Department of Physics, College of Science, Clemson University, 118 Kinard Laboratory, Clemson, South Carolina, 29634, USA.

Journal of computational biophysics and chemistry

|February 2, 2026

概括

误解变体 (氨酸到氨酸和氨酸到氨酸) 可以通过改变蛋白质结构和pH依赖功能而致病. 致病变体在蛋白质核和特定的次要结构中得到丰富,影响蛋白质的活性和功能.

科学领域:

生物化学生物化学
遗传学遗传学是一个
结构生物学结构生物学

背景情况:

误解变体涉及氨酸 (R) 和氨酸 (H) 替代 (R>H,H>R) 保持电荷,但改变pH依赖的蛋白质行为.
这些变化可能会导致对蛋白质功能的上下文依赖性影响,可能导致致病性.

研究的目的:

确定导致R>H和H>R误解变异的致病性因素.
分析结构,物理化学和功能特征,区分病原性和良性变体.

主要方法:

从ClinVar组装了高可信度的人类R>H和H>R变体,分为致病性或良性.
分析的变体位置 (核心与表面,次要结构),活动的pH-最佳值和蛋白质功能类.
研究了对特定蛋白质类型 (例如转录因子,酶) 的变体的丰富.

主要成果:

致病性R>H/H>R变体在蛋白质核和有序区域中富含,与表面上发现的良性变体不同.
R>H 致病变体更倾向于螺旋,而 H>R 致病变体更倾向于β-链.
致病变体在结合重的蛋白质和特定类型的酶 (氧化还原酶,离子通道,载体,酶) 中过度表现.
H>R致病变体在中性/生理pH范围内表现过多,影响pH依赖活性.

结论:

变异位置和次要结构偏好区分致病性与良性R>H/H>R变异.
取决于pH值的行为和蛋白质的功能类别是致病性的关键因素.
了解这些变体特征有助于预测病原性和疾病相关性.

关键词:

阿尔吉尼因 (Arginine) 是一种素.希斯蒂丁因 (Histidine) 是一种氨酸.误解突变是一种错误的突变.蛋白质蛋白质蛋白质在pH的依赖性.

更多相关视频

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

Published on: August 20, 2019

A Scalable, Cell-Based Method for the Functional Assessment of Ube3a Variants

A Scalable, Cell-Based Method for the Functional Assessment of Ube3a Variants

Published on: October 10, 2022

相关概念视频

Histone Variants at the Centromere

Histone Variants at the Centromere

Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...

Structural Protein Function

Structural Protein Function

Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to...

Structural Protein Function

Structural Protein Function

Fruit Development, Structure, and Function

Fruit Development, Structure, and Function

Fruits form from a mature flower ovary. As seeds develop from the ovules contained within, the ovary wall undergoes a series of complex changes to form fruit. In some fruits, such as soybeans, the ovary wall dries; in other fruits, such as grapes, it remains fleshy. In some cases, organs other than the ovary contribute to fruit formation; such fruits are called accessory fruits.

Structure and Function of Erythrocytes

Structure and Function of Erythrocytes

There are between 4.2 and 6 million erythrocytes, also known as red blood cells, in every microliter of blood. These cells are small, flattened biconcave discs with centers that are depressed.
The erythrocyte plasma membrane is associated with proteins such as spectrin, which forms a flexible cytoplasmic meshwork. This meshwork allows erythrocytes to twist, turn, become cup-shaped, and regain their biconcave shape as they pass through narrow capillaries. Additionally, erythrocytes can form...

Structure and Function of Platelets

Structure and Function of Platelets

The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000...