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Capítulo 25

The Cytoskeleton I: Actin and Microfilaments

Introducción al Citoesqueleto
Introducción al Citoesqueleto
Overview of the Cytoskeleton The cytoskeleton is a network of protein filaments present within the cell, having three distinct filaments ...
Adaptabilidad de los filamentos del citoesqueleto
Adaptabilidad de los filamentos del citoesqueleto
The cytoskeleton is a complex dynamic structure performing varied functions based on cellular requirements. The adaptability of the individual filaments ...
Polaridad del citoesqueleto
Polaridad del citoesqueleto
The intrinsic polarity of cells can be primarily attributed to two factors- i) the asymmetric accumulation of mobile components such are regulatory ...
Ensamblaje de filamentos del citoesqueleto
Ensamblaje de filamentos del citoesqueleto
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate ...
Proteínas enlazadoras del citoesqueleto - Plakins
Proteínas enlazadoras del citoesqueleto - Plakins
Plakins are large proteins with binding domains for microtubules, microfilaments, intermediate filaments, and membrane-associated protein complexes at ...
Proteínas accesorias del citoesqueleto
Proteínas accesorias del citoesqueleto
The cytoskeleton is an essential cell component that plays several structural and functional roles. However, the filaments that make up the cytoskeleton ...
Proteínas del citoesqueleto en bacterias
Proteínas del citoesqueleto en bacterias
Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in ...
Movimiento intracelular de virus y bacterias
Movimiento intracelular de virus y bacterias
Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include ...
Estudio del citoesqueleto
Estudio del citoesqueleto
The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering ...
Introducción a la actina
Introducción a la actina
Actin is a highly conserved cytoskeletal protein found abundantly in eukaryotic cells. It constitutes 10% weight of the total cellular protein in muscle ...
Polimerización de actina
Polimerización de 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 ...
Cinta de correr con actina
Cinta de correr con actina
Actin filaments undergo polymerization and depolymerization from either end. The polymerization and depolymerization rates depend on the cytosolic ...
Generación de filamentos de actina rectos o ramificados
Generación de filamentos de actina rectos o ramificados
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. ...
Despolimerización de filamentos de actina
Despolimerización 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 ...
Formación de filamentos de actina de orden superior
Formación de filamentos de actina de orden 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 ...
Descripción general de la estructura y función de la miosina
Descripción general de la estructura y función de la 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 y miosina en la contracción muscular
Actina y miosina en la contracción muscular
Actin and myosin are contractile proteins that form the sarcomere found in skeletal muscle tissues for regulating muscle contraction. Actin, a globular ...
El papel de la actina y la miosina en las células no musculares
El papel de la actina y la miosina en las células no 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 ...
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