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Eukaryotic RNA-guided endonucleases evolved from a unique clade of bacterial enzymes

ABSTRACT: Eukaryotic RNA-guided endonucleases evolved from a unique clade of bacterial enzymes

PROVIDER: PRJNA1031625 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26499762_1.fastq.gz	Fastqsanger.gz
	SRR26499762_2.fastq.gz	Fastqsanger.gz
	SRR26499763_1.fastq.gz	Fastqsanger.gz
	SRR26499763_2.fastq.gz	Fastqsanger.gz
	SRR26499764_1.fastq.gz	Fastqsanger.gz

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Eukaryotic RNA-guided endonucleases evolved from a unique clade of bacterial enzymes

Project description:RNA-guided endonucleases form the crux of diverse biological processes and technologies, including adaptive immunity, transposition, and genome editing. Some of these enzymes are components of insertion sequences (IS) in the IS200/IS605 and IS607 transposon families. Both IS families encode a TnpA transposase and TnpB nuclease, an RNA-guided enzyme ancestral to CRISPR-Cas12. In eukaryotes and their viruses, TnpB homologs occur as two distinct types, Fanzor1 and Fanzor2. We analyzed the evolutionary relationships between prokaryotic TnpBs and eukaryotic Fanzors, revealing that a clade of IS607 TnpBs with unusual active site arrangement found primarily in cyanobacteria likely gave rise to both types of Fanzors. The widespread nature of Fanzors imply that the properties of this particular group of IS607 TnpBs were particularly suited to adaptation and evolution in eukaryotes and their viruses. Biochemical analysis of a prokaryotic IS607 TnpB and virally encoded Fanzor1s revealed features that may have fostered co-evolution between TnpBs/Fanzors and their cognate transposases. These results provide insight into the evolutionary origins of a ubiquitous family of RNA-guided proteins that shows remarkable conservation across the three domains of life.

2023-11-18 | GSE246134 | GEO

Eukaryotic RNA-guided endonucleases evolved from a unique clade of bacterial enzymes.

Project description:RNA-guided endonucleases form the crux of diverse biological processes and technologies, including adaptive immunity, transposition, and genome editing. Some of these enzymes are components of insertion sequences (IS) in the IS200/IS605 and IS607 transposon families. Both IS families encode a TnpA transposase and a TnpB nuclease, an RNA-guided enzyme ancestral to CRISPR-Cas12s. In eukaryotes, TnpB homologs occur as two distinct types, Fanzor1s and Fanzor2s. We analyzed the evolutionary relationships between prokaryotic TnpBs and eukaryotic Fanzors, which revealed that both Fanzor1s and Fanzor2s stem from a single lineage of IS607 TnpBs with unusual active site arrangement. The widespread nature of Fanzors implies that the properties of this particular lineage of IS607 TnpBs were particularly suited to adaptation in eukaryotes. Biochemical analysis of an IS607 TnpB and Fanzor1s revealed common strategies employed by TnpBs and Fanzors to co-evolve with their cognate transposases. Collectively, our results provide a new model of sequential evolution from IS607 TnpBs to Fanzor2s, and Fanzor2s to Fanzor1s that details how genes of prokaryotic origin evolve to give rise to new protein families in eukaryotes.

| S-EPMC10711439 | biostudies-literature

Pattern-based genome mining of the MAR4 Streptomyces Clade

Project description:HRMS guided study of 42 marine Streptomyces in the MAR4 clade. Metabolomics data collected from Ethyl Acetate crude extracts of 50 ml liquid cultures.

2024-11-12 | MSV000096392 | MassIVE

Clade

Project description:Clade

| PRJEB38885 | ENA

piRNA-guided slicing specifies transcripts for Zucchini dependent, phased piRNA biogenesis

Project description:PIWI-clade Argonaute proteins repress transposable elements in animal gonads. Their sequence specificity is conferred via bound ~23-30nt long piRNAs, which are processed from single stranded precursor RNAs. How transcripts are specified as precursors and processed into stereotypical piRNA populations are central unresolved questions. Here we show that piRNA-guided RNA cleavage in Drosophila results not only in generation of a ping-pong partner piRNA but further triggers efficient 3′ directed and phased primary piRNA biogenesis. Phasing is a feature of primary piRNAs in somatic and germline cells and a consequence of consecutive endo-nucleolytic cleavage events catalyzed by Zucchini. Formation of 3′ and 5′ ends of flanking piRNAs is therefore tightly coupled. Zucchini also participates in 3′ end formation of secondary piRNAs but its function can be bypassed by additional downstream piRNA-guided cleavages and subsequent precursor trimming. Hallmarks of Zucchini-dependent phased piRNA biogenesis are also evident in mouse testes, pointing to an evolutionarily conserved mechanism of piRNA biogenesis. This study aims at understanding how piRNA biogenesis is intiated in the Drosophila germline and understanding the role of the nuclease Zucchini/MitoPLD in piRNA biogenesis in Drosophila/Mouse by analysing small RNA sequencing data of various genotypes and sensor constructs.

2015-06-07 | E-GEOD-64802 | biostudies-arrayexpress

piRNA-guided slicing specifies transcripts for Zucchini dependent, phased piRNA biogenesis

2015-06-07 | GSE64802 | GEO

RNA-seq analysis of model-guided engineered Saccharomyces cerevisiae chassis for improved dicarboxylic acids (malic, succinic and fumaric acid) production.

Project description:Model-guided chassis strain design has the potential to accelerate cellfactory development. In this experiment genetic targets were identified in silico and implemented in vivo to design a yeast chassis strain for enhanced production of succinic, malic and fumaric acid. The phenotype of engineered chassis strains was further optimised through adaptive laboratory evolution. RNA-seq analysis of engineered yeast chassis strains, evolved strains and wild-type (CEN.PK background)was performed to determine the effect of engineered gene deletions and evolution on the transcriptome.

2021-07-01 | E-MTAB-9499 | biostudies-arrayexpress

Staphylococcus aureus CC398 Clade Associated with Human-to-Human Transmission

Project description:Staphylococcus aureus clonal complex 398 (CC398) isolates colonize livestock and can spread to human contacts. Genetic analysis of isolates epidemiologically associated with human-to-human, but not livestock, transmission in multiple countries and continents identified a common clade that was negative for tet(M) and positive for bacteriophage 3. Another group of human-to-human-transmitted isolates belonged to the common livestock-associated clade but had acquired a unique φ7 bacteriophage. [Data is also available from http://bugs.sgul.ac.uk/E-BUGS-124]

2012-10-29 | E-BUGS-124 | biostudies-arrayexpress

Symbiodinium sp. Clade B

Project description:Symbiodinium sp. (Clade B)

| PRJNA260330 | ENA

Cladocopium sp. clade C

Project description:Symbiodinium sp. (Clade C)

| PRJNA260340 | ENA