与利氏综合征相关的复合异构型MRPS14变种
Maria Gabriela Otero1, Christina Freeman1, Ruchi Shah2,3
1Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA.
Annals of clinical and translational neurology
|May 3, 2025
概括
我们在MRPS14基因中发现了新的突变,导致一种罕见的线粒体疾病 (COXPD38) 与李氏综合征. 这扩大了这种严重的神经疾病的已知遗传原因.
科学领域:
- 遗传学 遗传学 是一个
- 线粒体生物学 线粒体生物学
- 神经学 神经学
背景情况:
- MRPS14 (uS14m) 对于线粒体蛋白质合成至关重要.
- 与MRPS14相关的疾病 (COXPD38) 是极其罕见的,以前只报告过一个病例.
- 线粒体疾病往往伴有复杂的多系统性症状.
研究的目的:
- 报告一个MRPS14相关疾病的新病例.
- 描述新患者的临床和分子发现.
- 扩大对李综合征遗传原因的理解.
主要方法:
- 基因测序用于识别MRPS14变异.
- 临床评估包括神经成像 (MRI) 和光谱.
- 生物化学分析使用纤维细胞蛋白质水平的西方斑点.
主要成果:
- 一名患者出现了运动/语言延迟和乳酸/氨酸升高.
- 大脑MRI证实了与利氏综合征一致的发现.
- 发现了新的化合物异构的MRPS14变体 (p.Asp37Asn,p.Asn60Asp).
- 在患者的纤维细胞中观察到MRPS14和COX2蛋白水平的降低.
结论:
- 鉴定到的MRPS14变种是致病的.
- 这一案例扩大了MRPS14相关疾病的临床谱和遗传基础.
- 对MRPS14功能和治疗策略的进一步研究是有必要的.
相关概念视频
ATP Synthase: Structure
11.7K
ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
11.7K
Lysosomal Hydrolases
3.7K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.7K
Incomplete Dominance
20.3K
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.
20.3K
Lethal Alleles
13.1K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
13.1K
Pleiotropy
37.8K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
37.8K
Translation
140.8K
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
140.8K


