Video Experimental Relacionado

Updated: Mar 2, 2026

Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine

Enzymatic Cascade Reactions for the Synthesis of Chiral Amino Alcohols from L-lysine

Published on: February 16, 2018

Origen biosintético de la molécula de ácido hidroxámico de la tricostatina A: identificación de un mecanismo

Kei Kudo¹, Taro Ozaki¹, Kazuo Shin-Ya²

¹Biotechnology Research Center, The University of Tokyo , 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.

Journal of the American Chemical Society

|May 13, 2017

Resumen

Los investigadores identificaron el clúster completo de genes biosintéticos de Trichostatin A (TSA) y demostraron su producción en un nuevo huésped. Esto revela la vía única para crear el grupo de ácido hidroxámico en TSA.

Área de la Ciencia:

La epigenética
Biosíntesis de productos naturales
Biología molecular

Sus antecedentes:

La tricostatina A (TSA) es un potente inhibidor de la histona deacetilasa (HDAC) utilizado en la investigación epigenética.
Su actividad inhibidora proviene del grupo ácido hidroxámico que quelata el ion zinc (II) en el sitio activo de HDAC.

Objetivo del estudio:

Identificar el conjunto completo de genes biosintéticos para la tricotatina A (TSA).
Para lograr una producción heteróloga de TSA.
Para aclarar la vía biosintética única para la fracción de ácido hidroxámico de TSA.

Principales métodos:

Identificación del grupo de genes biosintéticos TSA en Streptomyces sp. Es de RM72.
Producción heteróloga de AST en Streptomyces albus.
Análisis bioquímicos para caracterizar la vía de formación del ácido hidroxámico.

Principales resultados:

Se identificó el primer clúster de genes biosintéticos TSA completo.
La TSA se produjo con éxito de forma heterológica en Streptomyces albus.
Se descubrió un nuevo mecanismo de biosíntesis que implica la transferencia directa de hidroxilamina del ácido l-glutámico γ-monohidroxamato al ácido tricostático.

Conclusiones:

Se ha establecido la vía biosintética de TSA.
Este trabajo proporciona información sobre la biosíntesis de otros productos naturales que contienen ácido hidroxámico.
Los hallazgos allanan el camino para futuras investigaciones sobre modificadores epigenéticos y síntesis de productos naturales.

Más Videos Relacionados

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyltroponeiron

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyltroponeiron

Published on: August 12, 2019

Hydrolysis of a Ni-Schiff-Base Complex Using Conditions Suitable for Retention of Acid-labile Protecting Groups

Hydrolysis of a Ni-Schiff-Base Complex Using Conditions Suitable for Retention of Acid-labile Protecting Groups

Published on: April 6, 2017

Videos de Conceptos Relacionados

Amides to Carboxylic Acids: Hydrolysis

Amides to Carboxylic Acids: Hydrolysis

Amides can undergo either acid-catalyzed hydrolysis or base-promoted hydrolysis through a typical nucleophilic acyl substitution. Each hydrolysis requires severe conditions.
Acid-catalyzed hydrolysis:
Hydrolysis of amides under acidic conditions yields carboxylic acids. Since the reaction occurs slowly, hydrolysis requires the conditions of heat.
The mechanism begins with the protonation of the carbonyl oxygen by the acid catalyst. The protonation makes the amide carbonyl carbon more...

Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism

Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism

The Hofmann and Curtius rearrangement reactions can be applied to synthesize primary amines from carboxylic acid derivatives such as amides and acyl azides. In the Hofmann rearrangement, a primary amide undergoes deprotonation in the presence of a base, followed by halogenation to generate an N-haloamide. A second proton abstraction produces a stabilized anionic species, which rearranges to an isocyanate intermediate via an alkyl group migration from the carbonyl carbon to the neighboring...

Nitriles to Carboxylic Acids: Hydrolysis

Nitriles to Carboxylic Acids: Hydrolysis

Nitriles undergo acid-catalyzed hydrolysis or base-catalyzed hydrolysis to form a carboxylic acid. These reactions proceed via an amide intermediate.

Amino Acid Biosynthetic Pathways

Amino Acid Biosynthetic Pathways

Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...

Preparation of 1° Amines: Gabriel Synthesis

Preparation of 1° Amines: Gabriel Synthesis

Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...

Preparation of Amines: Reductive Amination of Aldehydes and Ketones

Preparation of Amines: Reductive Amination of Aldehydes and Ketones

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.