相关实验视频

Updated: Jun 3, 2025

Metabolic Labeling and Membrane Fractionation for Comparative Proteomic Analysis of Arabidopsis thaliana Suspension Cell Cultures

Metabolic Labeling and Membrane Fractionation for Comparative Proteomic Analysis of Arabidopsis thaliana Suspension Cell Cultures

Published on: September 28, 2013

来自Prorocentrum micans的一种与膜相关的delta-6脂肪酸脱酶的结构分析

Zhihong Du¹, Kaiwen Sun¹, Shangyi Xu¹

¹Department of Food & Bioproduct Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.

Journal of phycology

|January 8, 2025

概括

研究人员从海洋藻类中发现了一种新的delta-6脂肪酸脱酶 (PmD6). 结构和功能分析揭示了基质结合和催化所必需的关键残留物,为多不和脂肪酸生物合成提供了洞察力.

科学领域:

生物化学生物化学
分子生物学分子生物学
海洋生物学海洋生物学

背景情况:

德尔塔-6脂肪酸脱酶对于多不和脂肪酸 (PUFA) 生物合成至关重要.
它们与膜相关的性质使结构特征复杂化.
了解这些酶对于PUFA生产和代谢工程至关重要.

研究的目的:

确定和描述一种来自海洋藻类Prorocentrum micans.的新型delta-6脂肪酸脱酶.
为了阐明这种酶的结构功能关系,命名为PmD6.
提供对膜结合脱酶的基质结合和催化机制的机制性见解.

主要方法:

从Prorocentrum micans.中识别和克隆PmD6基因.
与膜蛋白相关的蛋白质表达和净化挑战.
使用基于同质性的方法进行结构建模.
位点定向的突变发生,以分析关键的残留功能.
酶活性测定以确认基质偏好和催化作用.

主要成果:

一种新型的delta-6脂肪酸脱酶 (PmD6) 被鉴定为对α-烯酸 (18:3n-3) 的偏好.
结构建模揭示了一个类似的结构,具有跨膜螺旋和细胞质域.
关键残留物 (Tyr226,Trp235,Phe345,Ser349) 被确定为基质接受的关键.
其他残留物 (Thr200, Leu391, Met389) 参与了甲基末基质相互作用.
通过稳定催化中心,asp255对于催化是必不可少的.

结论:

该研究提供了PmD6的详细结构-功能分析,这是一种海洋藻 delta-6 脂肪酸脱酶.
通过确定关键残留物获得了对基质结合和催化物的机理洞察.
这项工作有助于了解海洋生物中的脂肪酸脱酶的多样性和功能.

关键词:

这里是Porocentrum micans的前中心.多不和脂肪酸的生物合成.多可萨赫萨埃诺酸是什么意思八甲乙烯酸是什么八甲乙烯酸是什么八甲乙烯酸是什么结构功能关系关系.在 Δ6 脱酸酶.

更多相关视频

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Method to Visualize and Analyze Membrane Interacting Proteins by Transmission Electron Microscopy

Published on: March 5, 2017

Contrast-Matching Detergent in Small-Angle Neutron Scattering Experiments for Membrane Protein Structural Analysis and Ab Initio Modeling

Contrast-Matching Detergent in Small-Angle Neutron Scattering Experiments for Membrane Protein Structural Analysis and Ab Initio Modeling

Published on: October 21, 2018

相关概念视频

Membrane Domains

Membrane Domains

The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
Protein Domains
The membrane comprises a group of distinct proteins responsible for carrying out a cell's specific function. For example, the plasma membrane of the human sperm, or a single germ cell, contains a unique set of proteins in the...

Asymmetric Lipid Bilayer

Asymmetric Lipid Bilayer

Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...