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Kinetic analysis of Cas12a and Cas13a RNA-Guided nucleases for development of improved CRISPR-Based diagnostics

Journal Article · · iScience
 [1];  [2];  [1];  [2];  [1];  [2];  [3];  [4];  [5];  [1];  [1]
  1. Global Health Labs, Bellevue, WA (United States); Intellectual Ventures Global Good Fund, Bellevue, WA (United States)
  2. Global Health Labs, Bellevue, WA (United States)
  3. Université d'Angers, Angers (France)
  4. Univ. of California, Berkeley, CA (United States); Monash Univ., Melbourne, VIC (Australia)
  5. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Gladstone Institutes, San Francisco, CA (United States)
Bacterial CRISPR systems provide acquired immunity against invading nucleic acids by activating RNA-programmable RNases and DNases. Cas13a and Cas12a enzymes bound to CRISPR RNA (crRNA) recognize specific nucleic acid targets, initiating cleavage of the targets as well as non-target (trans) nucleic acids. Here, we examine the kinetics of single-turnover target and multi-turnover trans-nuclease activities of both enzymes. High-turnover, non-specific Cas13a trans-RNase activity is coupled to rapid binding of target RNA. By contrast, low-turnover Cas12a trans-nuclease activity is coupled to relatively slow cleavage of target DNA, selective for DNA over RNA, indifferent to base identity, and preferential for single-stranded substrates. Combining multiple crRNA increases detection sensitivity of targets, an approach we use to quantify pathogen DNA in samples from patients suspected of Buruli ulcer disease. Results reveal that these enzymes are kinetically adapted to play distinct roles in bacterial adaptive immunity and show how kinetic analysis can be applied to CRISPR-based diagnostics.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Institutes of Health (NIH); National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2470743
Journal Information:
iScience, Journal Name: iScience Journal Issue: 9 Vol. 24; ISSN 2589-0042
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (47)

Coupling immunity and programmed cell suicide in prokaryotes: Life-or-death choices journal November 2016
False-Positive Results and Contamination in Nucleic Acid Amplification Assays: Suggestions for a Prevent and Destroy Strategy journal April 2004
Indiscriminate ssDNA cleavage activity of CRISPR-Cas12a induces no detectable off-target effects in mouse embryos journal April 2021
Buruli Ulcer: a Review of the Current Knowledge journal September 2018
EcoRI endonuclease. Physical and catalytic properties of the homogenous enzyme. journal October 1976
CRISPR-based detection of SARS-CoV-2: A review from sample to result journal April 2021
Cpf1 Is a Single RNA-Guided Endonuclease of a Class 2 CRISPR-Cas System journal October 2015
The Molecular Architecture for RNA-Guided RNA Cleavage by Cas13a journal August 2017
Conformational Activation Promotes CRISPR-Cas12a Catalysis and Resetting of the Endonuclease Activity journal December 2018
Amplification-free detection of SARS-CoV-2 with CRISPR-Cas13a and mobile phone microscopy journal January 2021
DNA Unwinding Is the Primary Determinant of CRISPR-Cas9 Activity journal January 2018
RNA Binding and HEPN-Nuclease Activation Are Decoupled in CRISPR-Cas13a journal July 2018
Diversity, classification and evolution of CRISPR-Cas systems journal June 2017
Making and Breaking Nucleic Acids: Two-Mg2+-Ion Catalysis and Substrate Specificity journal April 2006
Discovery and Functional Characterization of Diverse Class 2 CRISPR-Cas Systems journal November 2015
Cas13b Is a Type VI-B CRISPR-Associated RNA-Guided RNase Differentially Regulated by Accessory Proteins Csx27 and Csx28 journal February 2017
Structural Basis for Guide RNA Processing and Seed-Dependent DNA Targeting by CRISPR-Cas12a journal April 2017
RNA Targeting by Functionally Orthogonal Type VI-A CRISPR-Cas Enzymes journal May 2017
Cas13d Is a Compact RNA-Targeting Type VI CRISPR Effector Positively Modulated by a WYL-Domain-Containing Accessory Protein journal April 2018
Kinetic Basis for DNA Target Specificity of CRISPR-Cas12a journal September 2018
CRISPR/Cas Systems towards Next-Generation Biosensing journal July 2019
Three New Cs for CRISPR: Collateral, Communicate, Cooperate journal June 2019
Nucleases: diversity of structure, function and mechanism journal September 2010
Statistical Method for Determining and Comparing Limits of Detection of Bioassays journal September 2015
DNA interrogation by the CRISPR RNA-guided endonuclease Cas9 journal January 2014
Two distinct RNase activities of CRISPR-C2c2 enable guide-RNA processing and RNA detection journal September 2016
CRISPR-Cas12a-assisted nucleic acid detection journal April 2018
Direct observation of DNA target searching and cleavage by CRISPR-Cas12a journal July 2018
RuvC uses dynamic probing of the Holliday junction to achieve sequence specificity and efficient resolution journal September 2019
Target-dependent nickase activities of the CRISPR–Cas nucleases Cpf1 and Cas9 journal March 2019
Cas13-induced cellular dormancy prevents the rise of CRISPR-resistant bacteriophage journal May 2019
The arms race between bacteria and their phage foes journal January 2020
Type III-A CRISPR immunity promotes mutagenesis of staphylococci journal April 2021
Broad-spectrum enzymatic inhibition of CRISPR-Cas12a journal April 2019
Real-time observation of DNA target interrogation and product release by the RNA-guided endonuclease CRISPR Cpf1 (Cas12a) journal May 2018
CRISPR-Cas12a has widespread off-target and dsDNA-nicking effects journal April 2020
Dry Reagent-Based Polymerase Chain Reaction Compared with Other Laboratory Methods Available for the Diagnosis of Buruli Ulcer Disease journal July 2007
Using molecular beacons as a sensitive fluorescence assay for enzymatic cleavage of single-stranded DNA journal June 2000
A phosphate‐binding subsite in bovine pancreatic ribonuclease A can be converted into a very efficient catalytic site journal January 2007
CRISPR-Cas12a target binding unleashes indiscriminate single-stranded DNase activity journal February 2018
Functionally diverse type V CRISPR-Cas systems journal December 2018
Establishment of Quantitative PCR (qPCR) and Culture Laboratory Facilities in a Field Hospital in Benin: 1-Year Results journal December 2014
Sensitivity of PCR Targeting the IS 2404 Insertion Sequence of Mycobacterium ulcerans in an Assay Using Punch Biopsy Specimens for Diagnosis of Buruli Ulcer journal August 2005
Functional Role of Glutamine 28 and Arginine 39 in Double Stranded RNA Cleavage by Human Pancreatic Ribonuclease journal March 2011
Next revolution in the molecular theranostics of infectious diseases: microfabricated systems for personalized medicine journal May 2006
Evaluation of a Lyophilized CRISPR-Cas12 Assay for a Sensitive, Specific, and Rapid Detection of SARS-CoV-2 journal March 2021
CRISPR-Cas12a exploits R-loop asymmetry to form double-strand breaks journal June 2020

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