A Functional Mini-Integrase in a Two-Protein Type V-C CRISPR System
Journal Article
·
· Molecular Cell
- Univ. of California, Berkeley, CA (United States); Harvard Univ., Cambridge, MA (United States)
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences (QB3); Tel Aviv Univ., Ramat Aviv (Israel)
- USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
- Univ. of California, Berkeley, CA (United States). California Inst. for Quantitative Biosciences (QB3)
- Univ. of California, Berkeley, CA (United States). Innovative Genomics Inst.
- 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
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
A CRISPR-Cas9–integrase complex generates precise DNA fragments for genome integration
Casposase structure and the mechanistic link between DNA transposition and spacer acquisition by CRISPR-Cas
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