Video Experimental Relacionado
Updated: Mar 7, 2026
08:47
Synthesis and Bioconjugation of Thiol-Reactive Reagents for the Creation of Site-Selectively Modified Immunoconjugates
Published on: March 6, 2019
10.2K
Reactivos basados en redox para la bioconjugación quimioselectiva de la metionina
Shixian Lin1, Xiaoyu Yang1,2, Shang Jia1
1Department of Chemistry, University of California, Berkeley, CA, USA.
Science (New York, N.Y.)
|February 11, 2017
Resumen
Los investigadores desarrollaron un nuevo método para etiquetar selectivamente la metionina en las proteínas utilizando reacciones redox. Este avance permite la entrega precisa de la carga útil para los conjugados de anticuerpos y fármacos y los estudios proteómicos.
Área de la Ciencia:
- Bioconjugación Química
- Proteomía
- Biología Química
Sus antecedentes:
- La funcionalización de la cisteína está bien establecida para diversas aplicaciones.
- La modificación selectiva de los residuos de metionina en las proteínas ha sido un desafío debido a su baja nucleofilia.
Objetivo del estudio:
- Desarrollar una nueva estrategia de bioconjugación quimioselectiva para la metionina.
- Para permitir el etiquetado preciso de proteínas y la entrega de carga útil para aplicaciones como conjugados de anticuerpos y medicamentos.
Principales métodos:
- Se han utilizado reactivos a base de oxaziridina para la bioconjugación mediada por redox.
- Condiciones de reacción investigadas para la biocompatibilidad y la selectividad.
- Aplicó el método al etiquetado de proteínas, la síntesis conjugada de anticuerpos y fármacos y el análisis de proteomas.
Principales resultados:
- Se ha logrado un etiquetado de metionina altamente selectivo, rápido y robusto.
- Se ha demostrado una conjugación exitosa en diversas condiciones biocompatibles.
- Residuos de metionina hiperreactivos identificados en proteomas enteros.
Conclusiones:
- La estrategia basada en redox desarrollada supera las limitaciones anteriores en la bioconjugación de metionina.
- Este método ofrece una amplia utilidad para la modificación precisa de proteínas y sistemas de administración de fármacos.
- Permite nuevas posibilidades en la investigación de proteómica y biología química.
Videos de Conceptos Relacionados
01:24Redox Reactions
59.2K
Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
59.2K
01:27Redox Reactions
1.3K
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
1.3K
02:36Oxymercuration-Reduction of Alkenes
9.5K
Oxymercuration–reduction of alkenes is one of the major reactions converting alkenes to alcohols. It involves the hydration of alkenes with mercuric acetate in a mixture of tetrahydrofuran and water, forming an organomercury adduct. This is followed by a demercuration step in which the adduct is reduced to an alcohol using sodium borohydride.
9.5K
01:26Redox Titration: Other Oxidizing and Reducing Agents
1.5K
Besides iodine, other oxidizing or reducing agents can serve as titrants in redox titrations. Common oxidizing titrants include KMnO4, cerium(IV), and K2Cr2O7. The choice of oxidizing titrants depends on factors like stability, cost, analyte strength, and reaction rate between the analyte and titrant. KMnO4 is a strong oxidizing titrant that reduces from Mn(VII) to Mn(II) in a highly acidic solution, simultaneously oxidizing the analyte to a higher oxidation state. In this case, KMnO4 acts as a...
1.5K
01:38Preparation of Amines: Reductive Amination of Aldehydes and Ketones
4.1K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
4.1K
02:33Preparation and Reactions of Thiols
7.8K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
7.8K