来自Campylobacter jejuniuni的CJ0600蛋白质的结构分析
Dong Uk Ki1, Hong Joon Choi1, Wan Seok Song2
1Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, 24341, Republic of Korea.
作为一种酶的Campylobacter jejuni蛋白CJ0600进行了结构分析. 它的功能是独一无二的,没有显著的氨酸脱硫酶或氨酸除氨酶活性,并且非常弱的1-aminocyclopropane-1-carboxylate除氨酶活性.
科学领域:
- 微生物学 微生物学
- 结构生物学 结构生物学
- 酶学 是一种酶学.
背景情况:
- 坎比洛巴克特 (Campylobacter jejuni) 是导致食物传播疾病的原因.
- 蛋白质CJ0600没有被描述,但被认为是一种1-aminocyclopropane-1-carboxylate (ACC) 脱氨酶或氨酸脱硫酶 (CysDS).
- 它的酶功能和结构基础是未知的.
研究的目的:
- 为了确定CJ0600.00的晶体结构.
- 描述CJ0600.的酶活性.
- 阐明CJ0600的功能背后的结构特征.
主要方法:
- 进行X射线晶体学以确定CJ0600结构.
- 酶定量测试用于检测ACC除氨酶,CysDS和血清除氨酶 (SerDA) 的活性.
- 对CJ0600和相关蛋白质的遗传学分析.
主要成果:
- CJ0600的晶体结构揭示了一个独特的单体形式,具有一个域间口袋结合氧化5'-酸盐 (PLP).
- 与已知的ACC除氨酶,CysDS和SerDA相比,CJ0600具有明显的活性部位残留物.
- 遗传学分析证实CJ0600在进化上与这些酶不同.
- CJ0600没有表现出CysDS或SerDA活性,只有极弱的ACC除氨酶活性.
结论:
- CJ0600是一种独特的PLP依赖酶.
- 它的结构和活性部位与已知的ACC除氨酶,CysDS和SerDA有很大的不同.
- CJ0600代表了一种新的酶类,其功能以前没有报告.
更多相关视频
09:15Combining X-Ray Crystallography with Small Angle X-Ray Scattering to Model Unstructured Regions of Nsa1 from S. Cerevisiae
Published on: January 10, 2018
09:43Subtyping of Campylobacter jejuni ssp. doylei Isolates Using Mass Spectrometry-based PhyloProteomics MSPP
Published on: October 30, 2016
相关概念视频
Cytoskeletal Proteins in Bacteria
Structural Protein Function
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...
Protein Organization
Mechanical Protein Function
Protein Complexes with Interchangeable Parts
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...
Globular Proteins
Globular proteins serve many important physiological functions, such as acting as enzymes, cellular messengers, and molecular transporters. These roles often require the proteins to be soluble in the aqueous...
