Video Experimental Relacionado
Updated: Sep 10, 2025

09:23
Determination of DNA Methylation of Imprinted Genes in Arabidopsis Endosperm
Published on: January 28, 2011
17.5K
La metilación del ADN orquesta la biosíntesis y el transporte de metabolitos secundarios en Papaver somniferum
1Department of Biology, Faculty of Science, Gazi University, Ankara, Türkiye.
PloS one
|August 25, 2025
Resumen
La metilación del ADN regula la amapola del opio
Área de la Ciencia:
- Biología molecular de las plantas
- La epigenética
- Metabolomía
Sus antecedentes:
- El papaver somniferum (papajo de opio) produce valiosos alcaloides de bencilisoquinolina (BIA).
- Se conocen vías enzimáticas para la biosíntesis de BIA, pero la regulación epigenética no está clara.
- La acumulación de ABI específica del tejido y del genotipo requiere una investigación adicional.
Objetivo del estudio:
- Para investigar el papel de la metilación del ADN en la acumulación de alcaloides de amapola.
- Para comparar los patrones de metilación del ADN en diferentes cultivares y tejidos de P. somniferum.
- Para entender el control epigenético de la producción de morfina y noscapina.
Principales métodos:
- Análisis comparativo de la metilación del ADN de los tejidos del tallo y de la cápsula.
- Análisis de las variedades de P. somniferum con perfiles alcaloides distintos.
- Análisis de la expresión génica y la modulación epigenética.
Principales resultados:
- Hipometilación en cultivares con alto contenido de alcaloides relacionados con la fotosíntesis y los genes del metabolismo.
- Firmas de metilación de ADN distintas para cultivares ricos en morfina (funciones de membrana) y ricos en noscapina (vías nucleares / ribosómicas).
- Expresión diferencial y modulación epigenética de genes involucrados en la biosíntesis, el transporte y la desintoxicación de BIA.
Conclusiones:
- La biosíntesis de la noscapina muestra un control regulador conservado; la producción de morfina está relacionada con un aumento de la fotosíntesis y el metabolismo.
- La metilación del ADN es un factor clave en la especialización metabólica de la amapola.
- Este estudio ofrece una visión epigenómica integradora de la biosíntesis de alcaloides.
Videos de Conceptos Relacionados
Phase II Reactions: Methylation Reactions
340
Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...
The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...
340
Biosynthesis of Nucleic Acids
169
Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
169
Epigenetic Regulation
3.1K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.1K
Overview of Metabolism
31.9K
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...
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...
31.9K
Biosynthesis of Polysaccharides
90
Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
90
Inheritance of Chromatin Structures
6.6K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.6K

