Primed adaptation tolerates extensive structural and size variations of the CRISPR RNA guide in Haloarcula hispanica
نویسندگان
چکیده
منابع مشابه
DNA 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 کاملHaloarcula 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 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 کاملAmino acid biosynthesis in the halophilic archaeon Haloarcula hispanica.
Biosynthesis of proteinogenic amino acids in the extremely halophilic archaeon Haloarcula hispanica was explored by using biosynthetically directed fractional 13C labeling with a mixture of 90% unlabeled and 10% uniformly 13C-labeled glycerol. The resulting 13C-labeling patterns in the amino acids were analyzed by two-dimensional 13C,1H correlation spectroscopy. The experimental data provided e...
متن کاملAn improved transposon for the halophilic archaeon Haloarcula hispanica.
An improved transposon (ThD73) for Haloarcula hispanica is described. Based on the halobacterial insertion sequence ISH28, it showed little target sequence specificity but was biased toward a lower G+C content. Twenty randomly selected ThD73 mutants were analyzed, and the DNA flanking their insertions revealed several recognizable sequences, including two (unrelated) ISH elements.
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ژورنال
عنوان ژورنال: Nucleic Acids Research
سال: 2019
ISSN: 0305-1048,1362-4962
DOI: 10.1093/nar/gkz244