関連する実験動画
Updated: Jun 26, 2026

10:12
Measuring Spatial and Temporal Ca2+ Signals in Arabidopsis Plants
Published on: September 2, 2014
まとめ
カルシウムは,トウモロコシのコレオプティルのタンパク質のリン酸化を促進し,カルモジュリンの役割を示しています. この発見は,カルシウムを理解するための新しいアプローチを提供します.
科学分野:
- 植物分子生物学 植物分子生物学
- バイオケミストリー バイオケミストリー
- 細胞シグナリング
背景:
- カルシウムイオン (Ca2+) は,植物細胞における重要な二次伝達物質である.
- タンパク質のリン酸化は,植物における多数の細胞過程を調節する.
研究 の 目的:
- トウモロコシのコレオプティルのタンパク質リン酸化におけるカルシウムの役割を調査する.
- カルシウム媒介のリン酸化におけるカルモジュリンの関与を調査する.
主な方法:
- コーン・コレオプティルのサンプルをカルシウムで処理する.
- タンパク質のリン酸化レベルの測定.
- カルモジュリンの作用を評価するために,カルモジュリンの阻害剤であるクロロプロマジンを使用する.
主要な成果:
- カルシウム添加は,トウモロコシのコレオプチルのいくつかのポリペプチドのリン酸化を著しく促進しました.
- クロロプロマジン治療は,カルシウムによって促進されるリン酸化を阻害した.
- 結果は,カルモジュリンは,リン酸化に対するカルシウムの効果を媒介することを示唆しています.
結論:
- カルシウムは,植物におけるタンパク質のリン酸化を調節する上で重要な役割を果たします.
- カルモジュリンは,リン酸化に対するカルシウムの効果を媒介することに関与しています.
- この研究は,植物生理学におけるカルシウムの分子機構を理解するための基礎を提供します.
関連する概念動画
Phosphorylation
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Phosphorylation
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These modifications can affect the structure, activity, stability, and localization of proteins within cells as well as their interactions with other proteins.
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
During phosphorylation, protein kinases transfer the terminal phosphate group of ATP to specific amino acid side chains of substrate proteins. Serine, threonine, and tyrosine are the most commonly...
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein Kinases and Phosphatases
Proteins undergo chemical modifications that trigger changes in the charge, structure, and conformation of the proteins. Phosphorylation, acetylation, glycosylation, nitrosylation, ubiquitination, lipidation, methylation, and proteolysis are various protein modifications that regulate protein activity. Such modifications are usually enzyme-driven.
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Protein kinases
Many proteins in the cell are regulated by phosphorylation, the addition of a phosphate group. A family of enzymes called kinases...
Cell Signaling in Plants
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
Calmodulin-dependent Signaling
Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...

