関連する実験動画
Updated: Apr 29, 2026

08:57
Aip1p Dynamics Are Altered by the R256H Mutation in Actin
Published on: July 30, 2014
7.8K
まとめ
研究者らは,pDdアクチン2という新しいプラズミドを特定し,アクチン遺伝子が2つ含まれている. これらの遺伝子は有意なホモロジーを示しており,アクチンタンパク質のコーディングに不可欠な機能領域が保存されていることを示唆しています.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- アクチン遺伝子は細胞の構造と機能に不可欠です.
- 以前の研究では,M6,pcDd アクチンB1,pcDd アクチンA1.1.などのプラズミドにアクチン遺伝子を特定しました.
研究 の 目的:
- 新しく特定されたアクチン遺伝子を含むプラズミドであるpDdアクチン2を特徴付けるため,pDdアクチン2.
- 異なるアクチン遺伝子間の同質性および差異性を調査する.
主な方法:
- 制限断片を用いたプラズミド選択.
- 遺伝子ホモロジーを評価するためのヘテロデュプレックス形成.
- 遺伝子の分岐を決定する熱変性実験.
- アガロースゲル電泳により,mRNAサイズクラスを分析する.
主要な成果:
- プラズミドpDdアクチン2は,350bpのノンアクチンDNAで分離された2つのアクチン遺伝子を含んでいます.
- アクチン遺伝子の間で1100 +/- 100 bpの保存されたホモロジー領域が特定されました.
- アクチン遺伝子のペアは,熱変性による6~8%の差異を示した.
- アクチン遺伝子を補完する2つのmRNAサイズクラス (1.25kbと1.35kb) が観察されました.
結論:
- 特定されたホモロジー領域は,アクチンタンパク質のコーディングに必要な最小の長さに近い.
- この発見は,アクチン遺伝子ファミリーの構造と進化についての洞察を提供します.
- これらのアクチン遺伝子の関連性に関するさらなる調査が必要である.
関連する概念動画
Introduction to Actin
4.6K
Actin is a highly conserved cytoskeletal protein found abundantly in eukaryotic cells. It constitutes 10% weight of the total cellular protein in muscle cells, while in non-muscle cells, it is lower and makes up around 1–5 percent of the total cell protein. Actin found in the unicellular amoebae and complex multicellular animals is around 80% similar, demonstrating their conservation over a billion years of evolution. Actin coding genes are conserved within species and across...
4.6K
Actin Polymerization
6.3K
Actin polymerization occurs through the head-to-tail association of binding sites on monomeric actin or G-actin to form filamentous or F-actin. The polymerization can be divided into three phases ̶ nucleation, elongation, and steady-state phase.
The nucleation phase involves forming a stable nucleus consisting of three actin monomers to form a new actin filament. Actin-binding proteins such as formins and Arp2/3 complex help filament growth post-nucleation. The Formins form straight...
The nucleation phase involves forming a stable nucleus consisting of three actin monomers to form a new actin filament. Actin-binding proteins such as formins and Arp2/3 complex help filament growth post-nucleation. The Formins form straight...
6.3K
Generation of Straight or Branched Actin Filaments
2.9K
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
2.9K
Actin Filament Depolymerization
3.0K
Actin filaments (F-actin) are composed of actin subunits. The dissociation of actin monomers can occur from either end of F-actin. The rate of dissociation is faster from the minus-end or the pointed end, where the actin subunits exist with a bound ADP, together known as ADP-actin. The depolymerization of F-actin is aided by proteins, including the actin-depolymerizing factor (ADF) and cofilin family of proteins, gelsolin, and glia maturation factor (GMF).
In F-actin, the ADF/cofilin proteins...
In F-actin, the ADF/cofilin proteins...
3.0K
Formation of Higher-order Actin Filaments
2.8K
The polymerization of G-actin monomers into filamentous F-actin is a multi-step process. Once the F-actins are formed, they can bundle together in different arrangements to form higher-order networks and regulate cellular functions. Common examples include the formation of lamellipodia and filopodia at the cell's leading edge by actin reorganization in a migrating cell. The microvilli on the brush border epithelial cells are also formed through the F-actin network.
The high-order actin...
The high-order actin...
2.8K
Actin Polymerization and Cell Motility
5.8K
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....
5.8K

