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Videos de Conceptos Relacionados

Subcellular Fractionation01:32

Subcellular Fractionation

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The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
Differential Centrifugation
Differential centrifugation is...
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Proteomics01:33

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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Overview of Advanced Functional Groups02:22

Overview of Advanced Functional Groups

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Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
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Factors Influencing Attraction I: Proximity01:22

Factors Influencing Attraction I: Proximity

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Proximity plays a fundamental role in shaping interpersonal attraction by increasing opportunities for interaction and fostering familiarity. Research consistently demonstrates that individuals are more likely to form social bonds with those who are physically closer to them, whether in residential settings, workplaces, or educational institutions. This effect is largely driven by the increased frequency of encounters, which facilitates the development of friendships and romantic...
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Extraction: Advanced Methods00:56

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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Microtubule Associated Proteins (MAPs)01:42

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Microtubule function and architecture are regulated by an array of specialized proteins called microtubule-associated proteins or MAPs. These proteins are widespread across different organisms and have conserved protein motifs, like the multi-TOG domain for tubulin binding found in the CLASP family of MAPs. Some MAPs are lineage-specific based on their conserved domains. Their functions depend upon the cytoskeletal architecture and cell type they are located within. In-plant cells, a specific...
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Video Experimental Relacionado

Updated: Feb 1, 2026

Characterization of Neuronal Lysosome Interactome with Proximity Labeling Proteomics
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Avances recientes en el mapeo proteómico subcelular basado en el etiquetado de proximidad

Gang Wang1, Jiapeng Liu2, Xuege Sun3

  • 1College of Chemistry and Molecular Engineering, Synthetic and Functional Biomolecules Center, Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, 100871, China.

Molecular & cellular proteomics : MCP
|January 30, 2026
PubMed
Resumen
Este resumen es generado por máquina.

Nuevos métodos de etiquetado de proximidad (PL) mapean con precisión los proteomas celulares, revelando la localización de proteínas, modificaciones e interacciones. Las técnicas avanzadas como optoPL e immunoPL ofrecen control espaciotemporal para un análisis detallado del proteoma subcelular.

Palabras clave:
etiquetado de proximidadproteómica subcelularmapeo de proteínasmodificaciones post-traduccionalesinteracciones de proteínasoptoPLimmunoPL

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Área de la Ciencia:

  • Biología Celular
  • Proteómica
  • Bioquímica

Sus antecedentes:

  • La organización espacial del proteoma celular es crucial para las funciones fisiológicas.
  • La localización de proteínas influye en las modificaciones post-traduccionales, el tráfico y las interacciones.
  • La comprensión de la organización del proteoma subcelular mejora el conocimiento de las funciones de las proteínas.

Objetivo del estudio:

  • Revisar las tendencias emergentes en las técnicas de etiquetado de proximidad (PL).
  • Destacar los avances en el mapeo de proteomas subcelulares con alta precisión.
  • Analizar nuevos métodos de PL que ofrecen un control espaciotemporal mejorado.

Principales métodos:

  • Técnicas de etiquetado de proximidad mediadas por enzimas (PL) (p. ej., TurboID, APEX2).
  • Revisión de métodos emergentes de PL para el mapeo del proteoma subcelular.
  • Análisis de PL fotoactivable (optoPL) y PL dirigida por anticuerpos (immunoPL).

Principales resultados:

  • Las técnicas de PL permiten el mapeo preciso de proteomas subcelulares en células vivas.
  • Los métodos emergentes de PL proporcionan características multidimensionales de las proteínas (PTMs, tráfico, recambio, interacciones).
  • optoPL e immunoPL ofrecen un control espaciotemporal mejorado y un mapeo detallado sin manipulación genética.

Conclusiones:

  • Las técnicas avanzadas de PL están revolucionando el análisis del proteoma subcelular.
  • Estos métodos proporcionan detalles sin precedentes sobre la localización y función de las proteínas.
  • La investigación futura puede aprovechar estas herramientas para un mapeo integral del proteoma.