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Related Concept Videos

CRISPR/Cas9 Genome Editing01:28

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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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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...
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Homologous Recombination02:31

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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...
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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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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.
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Gene Conversion02:08

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Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
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Genome Editing in Mammalian Cell Lines using CRISPR-Cas
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Fueling chromosomal gene diversification and artificial evolution with CRISPR.

Ruiying Zhu1,2,3, Chuanhong Ren1,2,3, Zehua Bao4,5,6,7

  • 1Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310058, Zhejiang, China.

Genome Biology
|September 23, 2025
PubMed
Summary

Gene diversification using CRISPR technology allows for efficient variant function analysis and sequence evolution. This review explores CRISPR-assisted chromosomal gene diversification methods, their limitations, and future directions for enhanced artificial evolution.

Keywords:
CRISPREvolutionFunctional genomicsGene diversificationOrganism engineering

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biotechnology

Background:

  • Gene diversification is crucial for understanding variant functions and evolving sequences.
  • Traditional methods like in vitro mutagenesis and ectopic gene expression lack endogenous regulatory context.
  • The advent of CRISPR systems has revolutionized targeted gene diversification.

Purpose of the Study:

  • To review recent CRISPR-assisted methods for chromosomal gene diversification.
  • To analyze the advantages and limitations of these CRISPR-based approaches.
  • To propose strategies for overcoming current challenges and outline future technology development in artificial evolution.

Main Methods:

  • Review of current literature on CRISPR-assisted gene diversification techniques.
  • Comparative analysis of different CRISPR-based methods for chromosomal gene diversification.
  • Identification of limitations and potential solutions for artificial evolution strategies.

Main Results:

  • CRISPR systems significantly enhance the efficiency of targeted gene diversification.
  • Various CRISPR-assisted methods offer distinct advantages for dissecting variant functions.
  • Current limitations include challenges in simulating endogenous regulatory environments and achieving specific evolutionary outcomes.

Conclusions:

  • CRISPR-assisted chromosomal gene diversification is a powerful tool for biological research and synthetic biology.
  • Addressing limitations in simulating endogenous contexts and improving control over evolution is key for future advancements.
  • Continued technological development holds promise for more sophisticated artificial evolution applications.