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

C4 Pathway and CAM01:27

C4 Pathway and CAM

45.2K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
45.2K
The Calvin Benson Cycle01:46

The Calvin Benson Cycle

4.4K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.4K
The Calvin Cycle01:40

The Calvin Cycle

73.4K
Overview
73.4K
What is Photosynthesis?00:39

What is Photosynthesis?

98.4K
Photosynthesis is a multipart, biochemical process that occurs in plants as well as in some bacteria. It captures carbon dioxide and solar energy to produce glucose. Glucose stores chemical energy in the form of carbohydrates. The overall biochemical formula of photosynthesis is 6 CO2 + 6 H2O + Light energy → C6H12O6 + 6 O2. Photosynthesis releases oxygen into the atmosphere and is largely responsible for maintaining the Earth’s atmospheric oxygen content.
98.4K
The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

9.8K
The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
9.8K
Overview of Metabolism01:40

Overview of Metabolism

29.4K
Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
29.4K

También podría leer

Artículos Relacionados

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

Ordenar por
Same author

Hydrophobic Promoter-Enhanced Tandem Catalysis for Alkene Epoxidation With H<sub>2</sub> and O<sub>2</sub>.

Angewandte Chemie (International ed. in English)·2026
Same author

Research on a rapid and accurate diagnosis platform for liver fibrosis based on machine learning-assisted SERS technology.

Biomedical optics express·2026
Same author

Slow-wave sleep engages brainstem circuitry to prevent stress-induced anxiety.

Neuron·2026
Same author

Clustering characteristics of upper gastrointestinal cancer risk behaviours and their association with social determinants of health: a latent class analysis.

Scientific reports·2026
Same author

Mechanical cues as immunomodulators in neuroinflammation-driven spinal sensitization: analgesic mechanisms and therapeutic strategies.

Frontiers in immunology·2026
Same author

Structural basis of metalloid transport by the arsenite efflux pump ArsB.

Nature communications·2026
Same journal

A native sulfur deposit in Gale crater, Mars.

Science (New York, N.Y.)·2026
Same journal

Coordinated demise of harmful algal blooms.

Science (New York, N.Y.)·2026
Same journal

Genetic effects put into context.

Science (New York, N.Y.)·2026
Same journal

Bacteria share proteins to survive antibiotics.

Science (New York, N.Y.)·2026
Same journal

Impacts shaped Earth's first continents.

Science (New York, N.Y.)·2026
Same journal

Erratum for the Report "Covalently bonded single-molecule junctions with stable and reversible photoswitched conductivity" by C. Jia <i>et al</i>.

Science (New York, N.Y.)·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: May 30, 2025

Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids
07:26

Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids

Published on: January 26, 2012

24.2K

Fijación de carbono sin fijación

Xiang Feng1,2, Douglas C Rees1,2

  • 1Division of Chemistry and Chemical Engineering, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA, USA.

Science (New York, N.Y.)
|January 30, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Las instantáneas estructurales de un complejo enzimático revelan piezas faltantes de un proceso biológico. Este hallazgo avanza en nuestra comprensión de los mecanismos celulares clave.

Más Videos Relacionados

Author Spotlight: Innovative Approaches to Understanding Plant Structure-Function Relationships for Climate-Resilient Crops
06:04

Author Spotlight: Innovative Approaches to Understanding Plant Structure-Function Relationships for Climate-Resilient Crops

Published on: July 12, 2024

838
Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis
10:46

Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis

Published on: December 9, 2022

1.9K

Videos de Experimentos Relacionados

Last Updated: May 30, 2025

Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids
07:26

Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids

Published on: January 26, 2012

24.2K
Author Spotlight: Innovative Approaches to Understanding Plant Structure-Function Relationships for Climate-Resilient Crops
06:04

Author Spotlight: Innovative Approaches to Understanding Plant Structure-Function Relationships for Climate-Resilient Crops

Published on: July 12, 2024

838
Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis
10:46

Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis

Published on: December 9, 2022

1.9K

Área de la Ciencia:

  • La bioquímica
  • Biología estructural
  • Biología molecular

Sus antecedentes:

  • Los complejos enzimáticos son cruciales para los procesos biológicos.
  • Comprender sus mecanismos dinámicos es esencial para descifrar las funciones celulares.

Objetivo del estudio:

  • Para aclarar la dinámica estructural de un complejo de enzimas clave.
  • Identificar los estados intermedios en una vía biológica crítica.

Principales métodos:

  • Se utilizó la crio-microscopía electrónica (cryo-EM) para capturar instantáneas estructurales.
  • Se emplearon técnicas de resolución temporal para estudiar los cambios conformacionales del complejo enzimático.

Principales resultados:

  • Se resolvieron múltiples estados estructurales del complejo enzimático.
  • Se visualizaron las conformaciones intermedias clave, no observadas anteriormente.
  • Estas estructuras proporcionan información sobre el ciclo catalítico del complejo enzimático.

Conclusiones:

  • El estudio revela intermedios estructurales no caracterizados anteriormente.
  • Esto proporciona una imagen más completa del mecanismo biológico del complejo enzimático.
  • Los hallazgos tienen implicaciones para la comprensión de la función y disfunción de las enzimas.