Haloarcula hispanica CRISPR authenticates PAM of a target sequence to prime discriminative adaptation
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منابع مشابه
Haloarcula hispanica CRISPR authenticates PAM of a target sequence to prime discriminative adaptation
The prokaryotic immune system CRISPR/Cas (Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated genes) adapts to foreign invaders by acquiring their short deoxyribonucleic acid (DNA) fragments as spacers, which guide subsequent interference to foreign nucleic acids based on sequence matching. The adaptation mechanism avoiding acquiring 'self' DNA fragments is poorly unders...
متن کاملDNA motifs determining the accuracy of repeat duplication during CRISPR adaptation in Haloarcula hispanica
Clustered Regularly Interspaced Short Palindromic Repeats (CRISPRs) acquire new spacers to generate adaptive immunity in prokaryotes. During spacer integration, the leader-preceded repeat is always accurately duplicated, leading to speculations of a repeat-length ruler. Here in Haloarcula hispanica, we demonstrate that the accurate duplication of its 30-bp repeat requires two conserved mid-repe...
متن کاملAdaptation of the Haloarcula hispanica CRISPR-Cas system to a purified virus strictly requires a priming process
The clustered regularly interspaced short palindromic repeat (CRISPR)-Cas system mediates adaptive immunity against foreign nucleic acids in prokaryotes. However, efficient adaptation of a native CRISPR to purified viruses has only been observed for the type II-A system from a Streptococcus thermophilus industry strain, and rarely reported for laboratory strains. Here, we provide a second nativ...
متن کاملComplete Genome Sequence of the Extremely Halophilic Archaeon Haloarcula hispanica Strain N601
Haloarcula hispanica has been widely used in haloarchaeal studies, particularly in the isolation of haloviruses. The genome of strain N601, a laboratory derivative of the type strain ATCC 33960, was sequenced. Several potentially significant differences from the published sequence of the type strain (CGMCC 1.2049 = ATCC 33960) were observed.
متن کاملThe spacer size of I-B CRISPR is modulated by the terminal sequence of the protospacer
Prokaryotes memorize invader information by incorporating alien DNA as spacers into CRISPR arrays. Although the spacer size has been suggested to be predefined by the architecture of the acquisition complex, there is usually an unexpected heterogeneity. Here, we explored the causes of this heterogeneity in Haloarcula hispanica I-B CRISPR. High-throughput sequencing following adaptation assays d...
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 2014
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/gku389