Video Experimental Relacionado
Updated: Sep 9, 2025
09:01
Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli
Published on: March 16, 2011
30.7K
MutagenesisForge: Un marco para el modelado de sesgos mutacionales a nivel de codón y el cálculo de dN/dS
bioRxiv : the preprint server for biology
|September 5, 2025
Resumen
MutagenesisForge simula la mutagenesis del codón para calcular las proporciones de sustitución sinónimas (dN) y sinónimas (dS). Esta herramienta ayuda al análisis evolutivo al proporcionar una plataforma flexible para probar hipótesis sobre la evolución molecular en los genes codificadores de proteínas.
Área de la Ciencia:
- Evolución molecular
- Biología computacional
- La bioinformática
Sus antecedentes:
- La relación de sustitución sinónimo a sinónimo (dN/dS) es crucial para comprender la evolución molecular y las fuerzas que dan forma a la divergencia de proteínas.
- La interpretación de las relaciones dN/dS puede ser compleja debido al contexto de la secuencia y la elección de modelos de sustitución.
Objetivo del estudio:
- Introducir MutagenesisForge, una nueva herramienta para simular la mutagenesis a nivel de codones y calcular las relaciones dN/dS.
- Proporcionar una plataforma flexible para probar hipótesis evolutivas y generar distribuciones nulas de dN/dS.
Principales métodos:
- MutagenesisForge es una herramienta modular de línea de comandos y un paquete de Python.
- Cuenta con una interfaz MutationModel que admite matrices de sustitución específicas.
- Ofrece los modos de simulación exhaustiva y contextual para los cálculos dN/dS.
Principales resultados:
- Permite la simulación de la mutagénesis a nivel de codón en condiciones definidas por el usuario.
- Facilita el cálculo consistente de las relaciones dN/dS en varios modelos evolutivos.
- Proporciona un marco flexible para analizar los procesos mutacionales en los genes codificadores de proteínas.
Conclusiones:
- MutagenesisForge ofrece una solución robusta para el análisis evolutivo de los genes codificadores de proteínas.
- Aborda los desafíos en la interpretación de dN/dS al permitir condiciones de simulación especificadas por el usuario.
- La herramienta admite pruebas de hipótesis para procesos mutacionales en la era de datos de secuenciación a gran escala.
Más Videos Relacionados
08:46Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
Published on: December 9, 2015
10.7K
09:04Studying Ribonucleotide Incorporation: Strand-specific Detection of Ribonucleotides in the Yeast Genome and Measuring Ribonucleotide-induced Mutagenesis
Published on: July 26, 2018
7.9K
Videos de Conceptos Relacionados
01:30Point and Frameshift Mutations
78
Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...
78
01:30Spontaneous and Induced Mutations
140
Spontaneous mutations arise infrequently during DNA replication due to errors in the process. A key factor behind these errors is tautomeric shifts in nitrogenous bases, where bases transition from keto to enol forms or amino to imino forms. This shift can alter base-pairing rules, leading to mutations. Additionally, reactive oxygen species (ROS) arising from aerobic metabolism can damage DNA, resulting in depurination (loss of a purine base) or depyrimidination (loss of a pyrimidine base).
140
01:16In-vitro Mutagenesis
14.2K
To learn more about the function of a gene, researchers can observe what happens when the gene is inactivated or “knocked out,” by creating genetically engineered knockout animals. Knockout mice have been particularly useful as models for human diseases such as cancer, Parkinson’s disease, and diabetes.
14.2K
01:09Mutation, Gene Flow, and Genetic Drift
59.4K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
59.4K
01:20Mismatch Repair
5.2K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
5.2K
01:18Mutations in Microorganisms
74
Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
74