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Related Concept Videos

CRISPR01:59

CRISPR

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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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CRISPR and crRNAs02:53

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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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Related Experiment Video

Updated: May 21, 2025

Author Spotlight: Development of Simplified CRISPR-Based Tests for Rapid Detection of Infectious Diseases
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Methods for Cas13a expression and purification for use in CRISPR diagnostics.

Her Xiang Chai1, Rebecca S Bamert1, Gavin J Knott1

  • 1Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia.

Methods in Enzymology
|March 22, 2025
PubMed
Summary
This summary is machine-generated.

Emerging infectious diseases necessitate rapid diagnostics. This study details the expression, purification, and validation of Leptotrichia buccalis (Lbu) Cas13a, a CRISPR-based RNA detection tool for improved point-of-care molecular diagnostics.

Keywords:
CRISPR-based diagnosticsDirect detectionLbuCas13aPoint-of-care diagnostics

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Infectious Disease Diagnostics

Background:

  • Emerging infectious diseases, like COVID-19 caused by SARS-CoV-2, underscore the need for rapid and accurate diagnostic tools.
  • Conventional nucleic acid diagnostic methods, such as qPCR, are sensitive and accurate but often resource-intensive and lab-bound.
  • There is a growing demand for low-cost, rapid, point-of-care diagnostic solutions.

Purpose of the Study:

  • To describe a detailed method for the expression, purification, and validation of Leptotrichia buccalis (Lbu) Cas13a.
  • To facilitate the widespread adoption of LbuCas13a as a tool for molecular diagnostics.
  • To enhance RNA detection capabilities for emerging infectious diseases.

Main Methods:

  • Expression and purification of the LbuCas13a protein.
  • Validation of LbuCas13a for RNA detection in complex biological samples.
  • Characterization of LbuCas13a's performance with and without pre-amplification.

Main Results:

  • Successfully expressed and purified functional LbuCas13a.
  • Validated LbuCas13a for sensitive and rapid RNA detection.
  • Demonstrated LbuCas13a's utility in complex mixtures, applicable to point-of-care diagnostics.

Conclusions:

  • LbuCas13a is a potent CRISPR-based tool for rapid RNA detection.
  • The described protocol enables the production and validation of LbuCas13a for diagnostic applications.
  • This work supports the development of advanced point-of-care diagnostics for infectious diseases.