相关实验视频

Updated: Jun 2, 2026

Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays
08:57

Myosin-Specific Adaptations of In vitro Fluorescence Microscopy-Based Motility Assays

Published on: February 4, 2021

通过myosin-II聚合酶激活Acanthamoeba的actomyosin ATPase活动

D P Kiehart, T D Pollard

    Nature
    |April 23, 2011
    PubMed
    概括

    肌酸氨酸聚合,而不仅仅是酸化,直接增加了actomyosin ATPase活动. 这项研究使用了抗体来拆解髓丝,揭示了聚合.

    更多相关视频

    Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops06:48

    Tuning the Contractility and Deformation Modes of Active Actin-Based Assemblies In Vitro: From Two-Dimensional Active Networks to Liquid Crystal Drops

    Published on: July 11, 2025

    Probing Myosin Ensemble Mechanics in Actin Filament Bundles Using Optical Tweezers06:53

    Probing Myosin Ensemble Mechanics in Actin Filament Bundles Using Optical Tweezers

    Published on: May 4, 2022

    相关概念视频

    Actin Polymerization01:42

    Actin Polymerization

    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 actin...
    Actin and Myosin in Muscle Contraction01:16

    Actin and Myosin in Muscle Contraction

    Actin and myosin are contractile proteins that form the sarcomere found in skeletal muscle tissues for regulating muscle contraction. Actin, a globular contractile protein, interacts with myosin for muscle contraction. The skeletal tissue appears striped or striated under a microscope due to the repeated arrangement of contractile proteins actin and myosin along the length of myofibrils. Dark A bands and light I bands repeat along myofibrils, and the alignment of myofibrils in the cell causes...
    Role of Myosin in Cell Migration01:18

    Role of Myosin in Cell Migration

    Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
    Myosin II  is a hexamer comprising two heavy chains with globular heads and coiled-coil tails, two regulatory light chains, and two essential light chains. The ATPase sites on the myosin heads hydrolyze ATP, and the released phosphate generates the force for contraction. It is...
    Actin Polymerization and Cell Motility01:13

    Actin Polymerization and Cell Motility

    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.
    Overview of Myosin Structure and Function01:15

    Overview of Myosin Structure and Function

    Myosins are a family of molecular motor proteins, first identified in the skeletal muscles, where they are responsible for muscle contraction. Along with their role in muscle contraction, these proteins also play a role in the intracellular transport of molecules and vesicles. There are twenty-four classes of myosins based on their domain sequence and organization. Of the twenty-four, six classes (Myosin I, Myosin II, Myosin V, Myosin VI, Myosin VII, and Myosin X)  have been well characterized.
    Generation of Straight or Branched Actin Filaments01:14

    Generation of Straight or Branched Actin Filaments

    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...