控制与等离子膜相关的actin聚合,具体说明了细胞壁在树脂体血管的模式
Saku T Kijima1,2,3, Takema Sasaki1, Yuichiro Kikushima1
1Department of Biological Science, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8602, Japan.
Nature communications
|February 26, 2025
概括
植物细胞壁的模式,对功能至关重要,是由actin聚合调节的. 一项研究将KNOTTED-LIKE HOMEOBOX TRANSCRIPTION FACTOR 7 (KNAT7) 与细胞壁沉积联系在一起,影响了体容器中的水运输.
科学领域:
- 植物生物学 植物生物学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 植物细胞壁的图案决定了细胞的形状和功能.
- 原氧体和甲氧体血管细胞具有独特的细胞壁图案 (带状和状),对于水运输至关重要.
研究的目的:
- 为了研究控制在甲基血管中形成小穴细胞壁的分子机制.
- 为了确定关键的基因和涉及植物细胞壁模式的途径.
主要方法:
- 使用KNOTTED-LIKE HOMEOBOX TRANSCRIPTION FACTOR 7 (KNAT7) 的新分离的等位基因进行遗传分析.
- 研究了FORMIN HOMOLOGY DOMAIN CONTAINING PROTEIN11 (FH11) 在调节活性蛋白聚合和细胞壁沉积中的作用.
- 研究了KNAT7损失对ROP GTPases和微管组织的影响.
主要成果:
- 丧失KNAT7功能导致甲基中形成带状细胞壁,而不是典型的坑状图案.
- 丢失KNAT7导致FH11的错误表达,导致ROP GTPase和微管组织的改变.
- FH11的等离子膜定和actin聚合活性对其功能至关重要.
结论:
- 对于确定植物甲基细胞壁的模式而言,对actin聚合的转录控制至关重要.
- 过度的actin聚合会破坏细胞壁的形成,并促进带状模式.
- 适当调节活性蛋白聚合,对于植物细胞壁的模式确定至关重要.
相关概念视频
Actin Polymerization and Cell Motility
5.1K
Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
5.1K
Role of Microtubules in Cell Wall Deposition
2.3K
Microtubules are small hollow tubes in eukaryotic cells. The cell wall microtubules are polymerized dimers of two globular proteins, α-tubulin and β-tubulin, two globular proteins. With a diameter of about 25 nm, microtubules are the widest components of the cytoskeleton. They help the cell resist compression and provide a track along which vesicles move through the cell or pull replicated chromosomes to opposite ends of a dividing cell. Microtubules go through quick cycles of...
2.3K
Mechanism of Lamellipodia Formation
2.5K
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
2.5K
Cell Adhesion in Plants
2.6K
Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
Pectins are complex heteropolymers mainly composed of negatively-charged α-D-glucopyranosyl uronic acid and some neutral glycosyl residues such as α-L-rhamnopyranose, α-L-arabinofuranose,...
2.6K
Cell Motility through Blebbing
1.9K
Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
Blebbing Through the Matrix
In multicellular...
1.9K
Mechanism of Filopodia Formation
2.3K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
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...
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...
2.3K


