来自青春期调节剂Makorin-3的新型CH-域指的溶液结构
Antonio J Rua1, Andrei T Alexandrescu1
1Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT, 06269, USA.
Biochemical and biophysical research communications
|March 12, 2026
概括
这种蛋白质是makorin 3 (MKRN3) 蛋白质.
科学领域:
- 生物化学 生物化学
- 结构生物学 结构生物学
- 分子生物学分子生物学
背景情况:
- 马科林 (MKRN) 家庭的泛素酶是生物过程的关键调节者.
- MKRN3突变与中部早期青春期 (CPP) 有关,突出其在性发育中的作用.
- 所有的马科林蛋白质都具有具有氨酸/氨酸丰富 (CH) 域的特征.
研究的目的:
- 阐明MKRN3 CH域的结构和功能特征.
- 为了研究MKRN3 CH域的金属结合性质和乌比奎相互作用.
主要方法:
- 循环二重化 (CD) 和核磁共振 (NMR) 光谱被用来研究蛋白质折叠和结构.
- 用NMR的pH标配和热变质来分析金属的协调性和稳定性.
- 通过同类学和建模指导的NMR化学转移扰动研究,评估了ubiquitin结合.
主要成果:
- MKRN3 CH域在结合一个具有高亲和力的单个Zn2+离子时折叠,采用了正规的指折叠.
- 确定了一个CCHC类型的金属结合部位,该域在高温下表现出化球体构造.
- 证明CH域结合了泛素,类似于其他E3-泛素连接酶中的类似域.
结论:
- MKRN3 CH 域是一个结合域,其结构和功能与其他 E3-ubiquitin 结合酶的结构和功能相似.
- 这种与ubiquitin的相互作用可能会调节MKRN3的结合酶活性,从而提供了对其在调节性发育中的作用的见解.
相关概念视频
Structure of Cadherins
5.1K
The cadherins were one of the first cell adhesion molecules discovered; the term “cadherins” is based on their calcium-dependent adhering properties. The first cadherins discovered on the epithelial, neuronal, and placental cells were named E-cadherin, P-cadherin, and N-cadherin, respectively. These classical cadherins share sequence and structural similarities. Other cadherins, including those involved in cell signaling, are grouped into non-classical cadherins. This...
5.1K
Conservation of Protein Domains Over Different Proteins
14.9K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.9K
Histone Variants at the Centromere
5.2K
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...
5.2K
Conserved Binding Sites
5.3K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
5.3K
Protein Complexes with Interchangeable Parts
3.0K
Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
3.0K
Valence Bond Theory
11.5K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.5K


