细胞质vWFA/VIT蛋白与WD40重复F盒蛋白之间的协同作用控制了Dictyostelium中的发育
Andrew W Boland1,2, Elisabet Gas-Pascual1,2,3, Hanke van der Wel1
1Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA, United States.
这项研究揭示了FbxwD和Vwa1蛋白质如何相互作用,以调节Dictyostelium发育中的细胞分化. 过度表达Vwa1域破坏了这个过程,这表明它在瘤抑制中发挥了作用.
科学领域:
- 细胞和分子生物学 细胞和分子生物学
- 发展生物学 发展生物学
- 生物化学 生物化学
背景情况:
- SCF (Skp1/cullin-1/F-box蛋白) E3 泛基因酶家族对于真核生物中的蛋白质组调节至关重要,包括社会性虫Dictyostelium.
- 双胞胎细胞的发育涉及从单细胞阶段过渡到多细胞阶段,最终形成分化的茎细胞和子细胞,由F-box蛋白和Skp1修饰调节.
研究的目的:
- 研究F-box蛋白FbxwD与含有inter-alpha-trypsin (VIT) 和von Willebrand factor-A (vWFA) 域的密室蛋白Vwa1之间的功能关系.
- 阐明FbxwD和Vwa1在Dictyostelium多细胞发育过程中调节细胞分化中的作用.
主要方法:
- 同免疫沉 (co-IP) 试验证实了FbxwD和Vwa1.1之间的相互作用.
- 在基因标记的Dictyostelium菌株中,在多细胞发育过程中分析蛋白质水平.
- 对FbxwD和Vwa1域的过度表达研究,以及对Vwa1的基因破坏,以评估它们对发育的影响.
主要成果:
- 互惠的共同IP证实了FbxwD和Vwa1之间的相互作用,在发育过程中具有类似的表达模式,表明了共同功能.
- 过度表达FbxwD干扰了终端细胞分化,这取决于其F-box和RING域和Vwa1表达.
- 过度表达Vwa1域,但不仅仅是Vwa1的干扰,停止了发展,表明Vwa1表达的调节作用.
结论:
- FbxwD-Vwa1复合体在调节Dictyostelium终端细胞分化方面发挥着至关重要的作用.
- Vwa1域可能通过人工激活Vwa1,可能通过自身抑制状态来负面调节发育,从而使其与FbxwD.的功能失衡.
- 这些发现表明,进化相关的蛋白质,如人类的VWA5A/BCSC-1,与瘤抑制作用的潜在相关性.
更多相关视频
11:14Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins
Published on: January 6, 2017
07:48Investigating the Function of Coronin A in the Early Starvation Response of Dictyostelium discoideum by Aggregation Assays
Published on: June 18, 2016
相关概念视频
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...
Mechanism of Filopodia Formation
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Overview of Secretory Vesicles
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Mechanism of Lamellipodia Formation
Pinching-off of Coated Vesicles
Canonical Wnt Signaling Pathway
