DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Nucleic Acids Research

Abstract 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.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2212840
Alternate ID(s):
OSTI ID: 2439563
Journal Information:
Nucleic Acids Research, Journal Name: Nucleic Acids Research Journal Issue: 22 Vol. 51; ISSN 0305-1048
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (38)

TnpB structure reveals minimal functional core of Cas12 nuclease family journal April 2023
The Transposon-Encoded Protein TnpB Processes Its Own mRNA into ωRNA for Guided Nuclease Activity journal June 2023
Horizontal Transfer and Evolution of Prokaryote Transposable Elements in Eukaryotes journal April 2013
Cryo-EM structure of the transposon-associated TnpB enzyme journal April 2023
Basic local alignment search tool journal October 1990
Mechanism of IS200/IS605 Family DNA Transposases: Activation and Transposon-Directed Target Site Selection journal January 2008
A proposed mechanism for IS607-family serine transposases journal January 2013
MMseqs2 enables sensitive protein sequence searching for the analysis of massive data sets journal October 2017
DALI shines a light on remote homologs: One hundred discoveries journal December 2022
Functional horizontal gene transfer from bacteria to eukaryotes journal November 2017
Programmable RNA-guided DNA endonucleases are widespread in eukaryotes and their viruses journal September 2023
Horizontal gene transfer in eukaryotic evolution journal August 2008
CRISPR-Cas12a target binding unleashes indiscriminate single-stranded DNase activity journal February 2018
Logomaker: beautiful sequence logos in Python journal December 2019
Transposon-encoded nucleases use guide RNAs to promote their selfish spread journal September 2023
Multiple serine transposase dimers assemble the transposon-end synaptic complex during IS607-family transposition journal October 2018
Homologues of bacterial TnpB_IS605 are widespread in diverse eukaryotic transposable elements journal January 2013
ViennaRNA Package 2.0 journal November 2011
Genomic Sequence of Spodoptera frugiperda Ascovirus 1a , an Enveloped, Double-Stranded DNA Insect Virus That Manipulates Apoptosis for Viral Reproduction journal December 2006
Interactive Tree Of Life (iTOL) v4: recent updates and new developments journal April 2019
CLANS: a Java application for visualizing protein families based on pairwise similarity journal July 2004
The Pfam protein families database: towards a more sustainable future journal December 2015
Transposon-associated TnpB is a programmable RNA-guided DNA endonuclease journal October 2021
Treemmer: a tool to reduce large phylogenetic datasets with minimal loss of diversity journal May 2018
CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice journal January 1994
CDD/SPARCLE: the conserved domain database in 2020 journal November 2019
trimAl: a tool for automated alignment trimming in large-scale phylogenetic analyses journal June 2009
Fanzor is a eukaryotic programmable RNA-guided endonuclease journal June 2023
FastTree 2 – Approximately Maximum-Likelihood Trees for Large Alignments journal March 2010
ColabFold: making protein folding accessible to all journal May 2022
Single-Stranded DNA Transposition Is Coupled to Host Replication journal August 2010
One-step hot formamide extraction of RNA from Saccharomyces cerevisiae journal July 2017
Mauve: Multiple Alignment of Conserved Genomic Sequence With Rearrangements journal June 2004
The widespread IS200/IS605 transposon family encodes diverse programmable RNA-guided endonucleases journal October 2021
Transmission of Ascovirus fromHeliothis virescens(Lepidoptera: Noctuidae) by Three Parasitoids and Effects of Virus on Survival of ParasitoidCardiochiles nigriceps(Hymenoptera: Braconidae) journal June 2004
Accelerated Profile HMM Searches journal October 2011
Protein Sequence Analysis Using the MPI Bioinformatics Toolkit journal December 2020
Gapped BLAST and PSI-BLAST: a new generation of protein database search programs journal September 1997