Video Experimental Relacionado
Updated: May 5, 2026

08:04
Assembling Molecular Shuttles Powered by Reversibly Attached Kinesins
Published on: January 26, 2019
8.2K
Los motores de kinesin: sin esfuerzo, sin ganancia
1Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA. jared.cochran@dartmouth.edu
Cell
|September 23, 2008
Resumen
La tensión entre los dominios motores es crucial para la quinesina.
Área de la Ciencia:
- Biología molecular La biología molecular.
- Mecánica celular La mecánica celular es la mecánica celular.
Sus antecedentes:
- La kinesin 1 es una proteína dimérica motora que se mueve a lo largo de los microtúbulos.
- El movimiento progresivo requiere comunicación entre sus dos dominios motores.
Objetivo del estudio:
- Para investigar el papel de la tensión en el movimiento procesivo de la kinesin 1.
- Para determinar si la tensión es suficiente para la motilidad motora.
Principales métodos:
- El estudio probablemente involucró técnicas biofísicas para medir las fuerzas y el movimiento de la quinesina 1.
- Observando el comportamiento de la cinesin 1 bajo diferentes condiciones de tensión.
Principales resultados:
- La tensión entre los dominios motores de la quinesina 1 es necesaria para la procesividad normal.
- Bajo ciertas condiciones, esta tensión por sí sola puede impulsar la motilidad motora.
Conclusiones:
- La comunicación en el dominio motor, específicamente la tensión, es un regulador clave de la función de la quinesina 1.
- La tensión puede ser una fuerza suficiente para el movimiento.
Videos de Conceptos Relacionados
Destabilization of Microtubules
2.9K
The destabilization of microtubules can occur during different stages of the microtubule lifecycle, such as nucleation or elongation. It can take place at either end of the microtubule or in the microtubule lattices as a whole. The lifespan of individual microtubules within a cell varies according to the cell type and stage of the cell cycle. During interphase, the lifespan of the microtubule is about 30 minutes, while during cell division, it is about 15 minutes. In axonal microtubules of...
2.9K
Microtubule Associated Motor Proteins
10.0K
Eukaryotic cells have different motor proteins for transporting various cargo within the cell. These motor proteins differ based on the filament they associate with, the direction they move within the cell, and the type of cargo they transport. Motor proteins that associate with microtubules are known as microtubule-associated motor proteins. There are two families of microtubule-associated motor proteins —Kinesins and Dyneins. Both these proteins assist in the transport of cellular...
10.0K
The Movement of Organelles and Vesicles
5.4K
In eukaryotic cells, cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
5.4K
Microtubules in Cell Motility
4.0K
Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
4.0K
Forces Acting on Chromosomes
3.1K
During mitosis, chromosome movements occur through the interplay of multiple piconewton level forces. In prometaphase, these forces help in chromosome assembly or congression at the equatorial plane, eventually leading to their alignment at the metaphase plate. The forces acting on the chromosomes are space and time-dependent; therefore, they vary with the position of the chromosomes as the cell progresses through mitosis.
Microtubules and motor proteins exert two types of forces on...
Microtubules and motor proteins exert two types of forces on...
3.1K
Anaphase A and B
4.3K
Microtubules form through the end-to-end polymerization of tubulin heterodimers. Kinetochore microtubules originate from the spindle poles, and their plus-ends connect with the kinetochores on sister-chromatids. Ndc80 protein complexes, present on the kinetochore, form low-affinity links with the plus end of these kinetochore microtubules.
Plus-end depolymerization releases tubulin heterodimers from the terminal region of the microtubule. As tubulin subunits are lost, the Ndc80 complexes detach...
Plus-end depolymerization releases tubulin heterodimers from the terminal region of the microtubule. As tubulin subunits are lost, the Ndc80 complexes detach...
4.3K

