Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

18.3K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
18.3K
Mitochondrial Protein Sorting01:39

Mitochondrial Protein Sorting

5.6K
Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death.  Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
5.6K
Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

9.0K
During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
9.0K
Structure of Porins01:21

Structure of Porins

3.8K
Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a  motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel...
3.8K
Mitochondrial Membranes01:45

Mitochondrial Membranes

16.5K
A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
16.5K
Porin Insertion in the Outer Mitochondrial Membrane01:12

Porin Insertion in the Outer Mitochondrial Membrane

4.5K
Porins are beta-barrel proteins translocated to the mitochondrial outer membrane through the TOM complex into the intermembrane space. Porin precursors bind TIM chaperones within the intermembrane space and are guided to the Sorting and Assembly Machinery complex or SAM complex on the outer mitochondrial membrane.
Three models describe the assembly of porins by the SAM complex and their insertion into the outer membrane. Model 1 suggests that porins are assembled outside the SAM channel as the...
4.5K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Functional Expression of Nicotinic Receptors on iPSC-Derived Astrocytes and Signalling Disturbances by a Panel of Neonicotinoid Pesticides and Their Metabolites.

International journal of molecular sciences·2026
Same author

Complex Distribution Phenomena and Plastic Binding of Test Chemicals in Cell Culture Experiments: Exemplification by Tebufenpyrad.

International journal of molecular sciences·2026
Same author

Combined Modeling Approaches for Assessing Sodium-Iodide Symporter Inhibition.

Journal of chemical information and modeling·2026
Same author

Exploring the Cell Biological and Functional Effects of the First Disease Associated KCC1 Genetic Variant.

Journal of cellular physiology·2025
Same author

PeriTox-M, a Cell-Based Assay for Peripheral Neurotoxicity with Improved Sensitivity to Mitochondrial Inhibitors.

Cells·2025
Same author

Differential Responses of Human iPSC-Derived Microglia to Stimulation with Diverse Inflammogens.

Cells·2025

Video Experimental Relacionado

Updated: Jan 7, 2026

Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
05:27

Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools

Published on: July 20, 2022

2.2K

Aprovechamiento de enfoques de docking de consenso para los complejos mitocondriales humanos I y III

Karin Grillberger1, Viktoria Magel2, Marcel Leist2

  • 1Department of Pharmaceutical Sciences, University of Vienna, Josef-Holaubek-Platz 2, Vienna 1090, Austria.

Chemical research in toxicology
|December 30, 2025
PubMed
Resumen

El acoplamiento molecular basado en la estructura predice eficazmente la toxicidad al clasificar los peligros de los compuestos. Este método, en particular la puntuación de consenso, aborda desafíos como los acantilados de actividad que pasan por alto las QSAR tradicionales, lo que ayuda a priorizar compuestos químicos más seguros.

Palabras clave:
acoplamiento molecularpredicción de toxicidadcomplejos mitocondrialesacantilados de actividadQSAR

Más Videos Relacionados

Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution
08:37

Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution

Published on: June 1, 2017

14.7K
Author Spotlight: Unveiling Oxidative Phosphorylation System Dynamics and Mitochondrial Roles in Health and Disease
05:45

Author Spotlight: Unveiling Oxidative Phosphorylation System Dynamics and Mitochondrial Roles in Health and Disease

Published on: May 3, 2024

1.9K

Videos de Experimentos Relacionados

Last Updated: Jan 7, 2026

Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
05:27

Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools

Published on: July 20, 2022

2.2K
Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution
08:37

Analyzing Supercomplexes of the Mitochondrial Electron Transport Chain with Native Electrophoresis, In-gel Assays, and Electroelution

Published on: June 1, 2017

14.7K
Author Spotlight: Unveiling Oxidative Phosphorylation System Dynamics and Mitochondrial Roles in Health and Disease
05:45

Author Spotlight: Unveiling Oxidative Phosphorylation System Dynamics and Mitochondrial Roles in Health and Disease

Published on: May 3, 2024

1.9K

Área de la Ciencia:

  • Química Computacional
  • Toxicología
  • Descubrimiento de Fármacos

Sus antecedentes:

  • Los métodos basados en la estructura, como el docking molecular, están infrautilizados para la predicción de toxicidad.
  • Los métodos convencionales de Relación Cuantitativa Estructura-Actividad (QSAR) luchan con desafíos como los acantilados de actividad causados por el estereoisomerismo.

Objetivo del estudio:

  • Evaluar las funciones de puntuación de docking molecular y las huellas dactilares de interacción para predecir la toxicidad de compuestos dirigidos a los complejos mitocondriales humanos I y III (CI, CIII).
  • Evaluar la utilidad de estos métodos basados en la estructura para identificar acantilados de actividad y priorizar compuestos para la seguridad.

Principales métodos:

  • Protocolo de docking de ajuste inducido para modelar la flexibilidad del sitio de unión.
  • Aplicación de varias funciones de puntuación de docking y huellas dactilares de interacción proteína-ligando.
  • Minimización de la energía de unión para la reevaluación.
  • Análisis de la correlación de rango con datos experimentales y pruebas in vitro.

Principales resultados:

  • Tanto la puntuación de docking individual como la de consenso mostraron una correlación de rango aceptable con los datos experimentales para CIII.
  • Las huellas dactilares de interacción de consenso diferenciaron subtipos de inhibidores en CIII.
  • Las pruebas in vitro confirmaron un acantilado de actividad dependiente del isomerismo para E-/Z-Fenpyroximate en CI.

Conclusiones:

  • El docking y la puntuación de consenso sirven como valiosas herramientas de cribado para priorizar compuestos en función de las afinidades de unión predichas.
  • Estos enfoques basados en la estructura mejoran la predicción de toxicidad, especialmente para casos complejos como los acantilados de actividad impulsados por estereoisomerismo.