Capítulo 25
O Citoesqueleto I: Actina e Microfilamentos
Introdução ao citoesqueleto
Overview of the Cytoskeleton
The cytoskeleton is a network of protein filaments present within the cell, having three distinct filaments ...
Adaptabilidade dos filamentos do citoesqueleto
The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments ...
Polaridade do citoesqueleto
The intrinsic polarity of cells can be primarily attributed to two factors- i) the asymmetric accumulation of mobile components such are regulatory ...
Montagem de filamentos do citoesqueleto
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate ...
Proteínas ligantes do citoesqueleto - Plakins
Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at ...
Proteínas Acessórias do Citoesqueleto
The cytoskeleton is an essential cell component that plays several structural and functional roles. However, the filaments that make up the cytoskeleton ...
Proteínas do Citoesqueleto em Bactérias
Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in ...
Movimento intracelular de vírus e bactérias
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include ...
Estudando o citoesqueleto
The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering ...
Introdução à Actina
Actin is a highly conserved cytoskeletal protein found abundantly in eukaryotic cells. It constitutes 10% weight of the total cellular protein in muscle ...
Polimerização da Actina
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 ...
Esteira de Actina
Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic ...
Geração de Filamentos de Actina Retos ou Ramificados
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. ...
Despolimerização de Filamentos de Actina
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 ...
Formação de Filamentos de Actina de Ordem Superior
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 ...
Visão Geral da Estrutura e Função da Miosina
Myosins are a family of molecular motor proteins, first identified in the skeletal muscles, where they are responsible for muscle contraction. Along with ...
Actina e Miosina na Contração Muscular
Actin and myosin are contractile proteins that form the sarcomere found in skeletal muscle tissues for regulating muscle contraction. Actin, a globular ...
O papel da Actina e da Miosina em Células Não-Musculares
Actin and myosin or actomyosin filaments also play a significant role in cells other than those involved in muscle contraction (which occurs within the ...
Copyright © 2025 MyJoVE Corporation. Todos os direitos reservados