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Videos de Conceptos Relacionados

CRISPR01:59

CRISPR

Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
Homologous Recombination02:31

Homologous Recombination

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
CRISPR and crRNAs02:53

CRISPR and crRNAs

Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
CRISPR01:59

CRISPR

Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
The Antiviral System of Bacteria and Archaea: CRISPR01:23

The Antiviral System of Bacteria and Archaea: CRISPR

CRISPR stands for Clustered Regularly Interspaced Short Palindromic Repeats is a adaptive immune system found in bacteria and archaea that protects against viral infections. This system enables prokaryotic cells to identify, remember, and neutralize foreign genetic elements, primarily bacteriophages, by storing fragments of the invader’s DNA as a genetic memory.The CRISPR immune response begins during an initial infection. Cas (CRISPR-associated) proteins play a central role in this defense.
CRISPR/Cas9 Genome Editing01:28

CRISPR/Cas9 Genome Editing

The CRISPR-Cas system serves as a bacterial defense mechanism against invading genetic elements such as viruses and plasmids, forming the foundation for its adaptation as a powerful genome-editing tool. Originally discovered in prokaryotes, this system has been repurposed to revolutionize genetic engineering across a wide range of organisms, including plants, animals, and humans. The core component, Cas9, is an endonuclease derived from Streptococcus pyogenes, capable of introducing...

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Video Experimental Relacionado

Updated: May 11, 2026

Enhanced Genome Editing with Cas9 Ribonucleoprotein in Diverse Cells and Organisms
09:51

Enhanced Genome Editing with Cas9 Ribonucleoprotein in Diverse Cells and Organisms

Published on: May 25, 2018

CRISPR-Cas: adaptación al cambio

Simon A Jackson1, Rebecca E McKenzie2, Robert D Fagerlund1

  • 1Department of Microbiology and Immunology, University of Otago, Post Office Box 56, Dunedin 9054, New Zealand.

Science (New York, N.Y.)
|April 8, 2017
PubMed
Resumen

Los sistemas CRISPR-Cas proporcionan a las procariotas inmunidad adaptativa contra los virus. Los avances recientes revelan cómo la maquinaria de proteínas Cas1-Cas2 impulsa la adaptación CRISPR, actualizando las memorias genéticas para reconocer nuevas amenazas.

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Last Updated: May 11, 2026

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Área de la Ciencia:

  • Microbiología
  • Biología molecular
  • Inmunología

Sus antecedentes:

  • Los procariotas se enfrentan a amenazas constantes de virus y elementos genéticos móviles.
  • Los sistemas CRISPR-Cas son sistemas inmunes adaptativos procariotas clave.
  • Estos sistemas utilizan la memoria genética para el reconocimiento y la neutralización de ADN/ARN extraños.

Objetivo del estudio:

  • Revisar los avances recientes en la comprensión de los mecanismos de adaptación de CRISPR.
  • Para resaltar el papel de la maquinaria de la proteína Cas1-Cas2 en la inmunidad CRISPR.

Principales métodos:

  • Revisión de la literatura científica actual sobre los sistemas CRISPR-Cas.
  • Análisis de los mecanismos moleculares que rigen la adaptación de CRISPR.
  • Centrarse en el complejo proteico Cas1-Cas2 conservado.

Principales resultados:

  • La adaptación CRISPR es esencial para actualizar las memorias genéticas contra las amenazas en evolución.
  • El complejo de proteínas Cas1-Cas2 es un componente conservado y fundamental en diversos sistemas CRISPR-Cas.
  • Esta maquinaria es fundamental para la respuesta inmune adaptativa en las procariotas.

Conclusiones:

  • El mecanismo Cas1-Cas2 es crucial para la actualización dinámica de la inmunidad adaptativa CRISPR-Cas.
  • La comprensión de estos mecanismos avanza nuestro conocimiento de las estrategias de defensa procarióticas.
  • Esta revisión consolida los conocimientos actuales sobre la adaptación de CRISPR, haciendo hincapié en el complejo Cas1-Cas2.