Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

A Functional Mini-Integrase in a Two-Protein Type V-C CRISPR System

Journal Article · · Molecular Cell
 [1];  [2];  [3];  [2];  [4];  [4];  [5];  [6];  [7]
  1. Univ. of California, Berkeley, CA (United States); Harvard Univ., Cambridge, MA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences (QB3); Tel Aviv Univ., Ramat Aviv (Israel)
  4. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
  5. Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences (QB3)
  6. Univ. of California, Berkeley, CA (United States). Innovative Genomics Inst.
  7. Univ. of California, Berkeley, CA (United States). Innovative Genomics Inst., Howard Hughes Medical Inst.; Gladstone Inst., San Francisco, CA (United States)
CRISPR-Cas immunity requires integration of short, foreign DNA fragments into the host genome at the CRISPR locus, a site consisting of alternating repeat sequences and foreign-derived spacers. In most CRISPR systems, the proteins Cas1 and Cas2 form the integration complex and are both essential for DNA acquisition. Most type V-C and V-D systems lack the cas2 gene and have unusually short CRISPR repeats and spacers. Here, we show that a mini-integrase comprising the type V-C Cas1 protein alone catalyzes DNA integration with a preference for short (17- to 19-base-pair) DNA fragments. The mini-integrase has weak specificity for the CRISPR array. We present evidence that the Cas1 proteins form a tetramer for integration. Our findings support a model of a minimal integrase with an internal ruler mechanism that favors shorter repeats and spacers. This minimal integrase may represent the function of the ancestral Cas1 prior to Cas2 adoption.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Institutes of Health (NIH); National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1581329
Journal Information:
Molecular Cell, Journal Name: Molecular Cell Journal Issue: 4 Vol. 73; ISSN 1097-2765
Publisher:
Cell Press - ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (40)

Intervening Sequences of Regularly Spaced Prokaryotic Repeats Derive from Foreign Genetic Elements journal February 2005
RNA-Guided RNA Cleavage by a CRISPR RNA-Cas Protein Complex journal November 2009
Structural and Mechanistic Basis of PAM-Dependent Spacer Acquisition in CRISPR-Cas Systems journal November 2015
Biology and Applications of CRISPR Systems: Harnessing Nature’s Toolbox for Genome Engineering journal January 2016
Self-synthesizing transposons: unexpected key players in the evolution of viruses and defense systems journal June 2016
Casposons: mobile genetic elements that gave rise to the CRISPR-Cas adaptation machinery journal August 2017
Diversity, classification and evolution of CRISPR-Cas systems journal June 2017
Mechanism of Foreign DNA Selection in a Bacterial Adaptive Immune System journal June 2012
Discovery and Functional Characterization of Diverse Class 2 CRISPR-Cas Systems journal November 2015
Adaptation in CRISPR-Cas Systems journal March 2016
CRISPR Immunological Memory Requires a Host Factor for Specificity journal June 2016
The CRISPR/Cas bacterial immune system cleaves bacteriophage and plasmid DNA journal November 2010
Integrase-mediated spacer acquisition during CRISPR–Cas adaptive immunity journal February 2015
Foreign DNA capture during CRISPR–Cas adaptive immunity journal October 2015
New CRISPR–Cas systems from uncultivated microbes journal December 2016
How type II CRISPR–Cas establish immunity through Cas1–Cas2-mediated spacer integration journal September 2017
Molecular memory of prior infections activates the CRISPR/Cas adaptive bacterial immunity system journal January 2012
Cas1–Cas2 complex formation mediates spacer acquisition during CRISPR–Cas adaptive immunity journal May 2014
Protecting genome integrity during CRISPR immune adaptation journal September 2016
Spontaneous CRISPR loci generation in vivo by non-canonical spacer integration journal January 2018
Novel neutral imidazole-lipophosphoramides for transfection assays journal January 2008
Spacer capture and integration by a type I-F Cas1–Cas2-3 CRISPR adaptation complex journal June 2017
Proteins and DNA elements essential for the CRISPR adaptation process in Escherichia coli journal February 2012
Sequences spanning the leader-repeat junction mediate CRISPR adaptation to phage in Streptococcus thermophilus journal January 2015
Detection and characterization of spacer integration intermediates in type I-E CRISPR–Cas system journal June 2014
The casposon-encoded Cas1 protein from Aciduliprofundum boonei is a DNA integrase that generates target site duplications journal November 2015
Asymmetric positioning of Cas1–2 complex and Integration Host Factor induced DNA bending guide the unidirectional homing of protospacer in CRISPR-Cas type I-E system journal November 2016
IMG/M: integrated genome and metagenome comparative data analysis system journal October 2016
Prespacer processing and specific integration in a Type I-A CRISPR system journal December 2017
Short motif sequences determine the targets of the prokaryotic CRISPR defence system journal March 2009
WebLogo: A Sequence Logo Generator journal May 2004
CRISPR Provides Acquired Resistance Against Viruses in Prokaryotes journal March 2007
Small CRISPR RNAs Guide Antiviral Defense in Prokaryotes journal August 2008
Structures of the CRISPR genome integration complex journal July 2017
Phage Response to CRISPR-Encoded Resistance in Streptococcus thermophilus journal December 2007
Casposons: a new superfamily of self-synthesizing DNA transposons at the origin of prokaryotic CRISPR-Cas immunity journal May 2014
Ultrafast and memory-efficient alignment of short DNA sequences to the human genome journal January 2009
RNA and DNA Targeting by a Reconstituted Thermus thermophilus Type III-A CRISPR-Cas System journal January 2017
Cutadapt removes adapter sequences from high-throughput sequencing reads journal May 2011
CRISPR-spacer integration reporter plasmids reveal distinct genuine acquisition specificities among CRISPR-Cas I-E variants of Escherichia coli journal February 2013

Cited By (5)

Sequence motifs recognized by the casposon integrase of Aciduliprofundum boonei journal May 2019
CRISPR repeat sequences and relative spacing specify DNA integration by Pyrococcus furiosus Cas1 and Cas2 journal June 2019
Adaptation processes that build CRISPR immunity: creative destruction, updated journal June 2019
Fidelity of prespacer capture and processing is governed by the PAM-mediated interactions of Cas1-2 adaptation complex in CRISPR-Cas type I-E system journal November 2019
Casposase structure and the mechanistic link between DNA transposition and spacer acquisition by CRISPR-Cas journal January 2020

Similar Records

Structures of the CRISPR genome integration complex
Journal Article · Wed Jul 19 20:00:00 EDT 2017 · Science · OSTI ID:1426734

A CRISPR-Cas9–integrase complex generates precise DNA fragments for genome integration
Journal Article · Sun Mar 07 19:00:00 EST 2021 · Nucleic Acids Research · OSTI ID:1815949

Casposase structure and the mechanistic link between DNA transposition and spacer acquisition by CRISPR-Cas
Journal Article · Tue Jan 07 19:00:00 EST 2020 · eLife · OSTI ID:1833697

Related Subjects