Video Experimental Relacionado

Updated: Apr 17, 2026

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Investigating Interactions Between Histone Modifying Enzymes and Transcription Factors in vivo by Fluorescence Resonance Energy Transfer

Published on: October 14, 2022

La evolución, la evolución de las cosas. Respuesta a Comentario sobre "Un intermediario promiscuo subyace a la

Samuel F Brockington¹, Edwige Moyroud¹, Camille Sayou²

¹Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EA, UK.

Science (New York, N.Y.)

|February 7, 2015

Resumen

Las nuevas secuencias LEAFY no desmienten el modelo de evolución a través de intermediarios promiscuos. El análisis de estas secuencias apoya el modelo evolutivo existente para las plantas terrestres.

Área de la Ciencia:

Biología evolutiva Biología evolutiva.
La filogenética es la filogenética.
Biología molecular La biología molecular.

Sus antecedentes:

La historia evolutiva de las plantas terrestres es objeto de debate.
Se han identificado nuevas secuencias LEAFY.
Estas secuencias desafían potencialmente los modelos evolutivos existentes.

Objetivo del estudio:

Para evaluar la afirmación de que las nuevas secuencias LEAFY contradicen el modelo de evolución a través de intermediarios promiscuos.
Para analizar nuevas secuencias de hojas en el contexto de la filogenia de las plantas terrestres.
Proporcionar evidencia que apoye o refuta el modelo evolutivo propuesto.

Principales métodos:

Análisis filogenético de las secuencias LEAFY.
Análisis comparativo de secuencias nuevas y conocidas.
Revisión de la literatura existente sobre la filogenia de las plantas terrestres.

Principales resultados:

Las nuevas secuencias LEAFY identificadas no invalidan el modelo de evolución a través de intermediarios promiscuos.
El análisis indica que estas secuencias son consistentes con el modelo propuesto.
El estudio aborda los debates en curso en la historia evolutiva de las plantas terrestres.

Conclusiones:

No hay evidencia concluyente para refutar el modelo de evolución a través de intermediarios promiscuos basados en nuevas secuencias LEAFY.
Los hallazgos apoyan la solidez del modelo intermedio promiscuo para explicar la evolución de las plantas terrestres.
Una mayor investigación sobre las secuencias LEAFY puede refinar nuestra comprensión de las vías evolutivas de las plantas.

Más Videos Relacionados

A Modified Yeast-one Hybrid System for Heteromeric Protein Complex-DNA Interaction Studies

A Modified Yeast-one Hybrid System for Heteromeric Protein Complex-DNA Interaction Studies

Published on: July 24, 2017

Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo

Chromatin Immunoprecipitation Assay for the Identification of Arabidopsis Protein-DNA Interactions In Vivo

Published on: January 14, 2016

Videos de Conceptos Relacionados

Single-Strand DNA Binding Proteins

Single-Strand DNA Binding Proteins

For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...

Conserved Binding Sites

Conserved Binding Sites

Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...

Cooperative Binding of Transcription Regulators

Cooperative Binding of Transcription Regulators

Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...

Cooperative Binding of Transcription Regulators

Cooperative Binding of Transcription Regulators

Position-effect Variegation

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.

Cis-regulatory Sequences

Cis-regulatory Sequences

Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...