Activa JavaScript para disfrutar de los vídeos de la Mediateca.

Aparato de Golgi - Contenido educativo

Ajuste de pantalla

El ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:

Subido el 4 de octubre de 2020 por Estrella D.

108 visualizaciones

Más información Transcripción

It is important that translated proteins are delivered to their specific cellular location. 00:00:08

To accomplish this, the protein is transferred through a series of membrane structures. 00:00:24

A principal membrane component is the Golgi apparatus. 00:00:29

The Golgi apparatus is the sorting organelle of the cell. 00:00:33

Proteins from the rough endoplasmic reticulum are sent to the Golgi. 00:00:38

As the proteins move through the Golgi apparatus, they are modified and packaged into vesicles. 00:00:42

Because the Golgi apparatus receives proteins from one location and targets them for delivery 00:00:48

to a second location, it is sometimes considered the post office of the cell. 00:00:53

The Golgi apparatus consists of general components. 00:00:59

The cyst cisterna nearest the endoplasmic reticulum , the medial and trans cisternae, 00:01:04

the trans-Golgi network. 00:01:13

Other key players in this process are the proteins being transported and the enzymes 00:01:16

that modify them. 00:01:21

Translated proteins are encapsulated in vesicles in the ER. 00:01:28

A group of these vesicles fuse, and these fused vesicles form the cis cisterna. 00:01:34

As the protein moves through the stack, it is modified by resident Golgi enzymes at specific 00:01:42

locations in the apparatus. 00:01:47

These modifications are important because they provide the signal that determines the 00:01:50

final destination of the protein. 00:01:54

So how does the protein move through the Golgi? 00:01:57

Movement occurs in waves. 00:02:00

First, the cis cisterna becomes part of the medial Golgi cisternae. 00:02:02

Behind it, a new cis cisterna is formed by the fusion of vesicles from the ER. 00:02:07

Meanwhile, one of the medial cisternae migrates and becomes the new trans cisterna. 00:02:12

Collectively, this process is known as the cismaturation model. 00:02:18

Proteins are sorted within the transgolgi network. 00:02:24

Proteins with the same target sequence are destined for delivery to the same location. 00:02:28

The transgolgi network then buds off into vesicles. 00:02:37

These vesicles then migrate to their target location. 00:02:43

These locations include internal organelles, such as the lysosome, the digestive organelle 00:02:47

of the cell. 00:02:52

The vesicles can also be targeted to the cell membrane, where the targeted protein can be 00:02:54

released from the cell for delivery elsewhere in the organism. 00:02:58

Subido por:: Estrella D.
Visualizaciones:: 108
Fecha:: 4 de octubre de 2020 - 12:56
Visibilidad:: Público
Centro:: IES JOAQUIN RODRIGO
Duración:: 03′ 28″
Relación de aspecto:: 4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:: 480x360 píxeles
Tamaño:: 9.10 MBytes