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Sumario bio

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Uploaded on
April 8, 2021
Number of pages
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Written in
2020/2021
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Biologia
citoesquele 1 PARCIAL




to
CITOESQUELETO
desaparición de los 3 filamentos del
citoesqueleto.
PROTEINAS LIGADORAS: conectan a los
filamentos entre si y con otros elementos
celulares.
PROTEINAS MOTORAS: trasladan
macromoléculas y organoides dentro del
citoplasma. Son esenciales para la motilidad,
contracción y cambios de forma celular.


Es un armazón proteico filamentoso
desplegado por todo el citosol.
CONSTITUIDO POR:
FILAMENTOS:
 Filamentos de actina – microfilamento
(7 nm)
 Filamentos intermedios (8 – 12 nm)
 Microtúbulos (25 nm)

PROTEINAS ACCESORIAS:
- Reguladoras
- Ligadoras
- Motoras

FUNCIONES

- Estabilidad celular y forma celular
- Locomoción celular
- División celular
- Movimiento de los orgánulos internos
- Regulación metabólica

PROTEINAS REGULADORAS: Controlan
el nacimiento, alargamiento, acortamiento y


1

, 4- Filamentos de desmina
5- Filamentos gliales
6- Neurofilamentos




FILAMENTOS
INTERMEDIOS
- Son polímeros lineales, cuyos
monómeros son proteínas en hélice
fibrosa.
- Miden aprox 10 nm. Son insolubles y
resisten cambios de T°.
- Forman una red continua entre la memb
plasmática y la envoltura nuclear.

FUNCIONES:
- Contribuyen a la forma celular.
- Poseen función mecánica.
- Dan ubicación a los organelos.

Existen 6 tipos; de acuerdo a su
composición:
1- Laminofilamentos
2- Filamentos de queratina
3- Filamentos de vimentina
2
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