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RNA-guided transposon mechanics show use of figure-eight intermediate and direct-transfer route

Phys · · 406 words · By Zhang Nannan
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What to know about RNA-guided transposon mechanics show use of figure-eight intermediate and direct-transfer route

A study published in Molecular Cell describes two distinct pathways used by RNA-guided IS110 transposons to mobilize DNA, including a figure-eight intermediate and a direct-transfer route. The research identifies the catalytic center responsible for these reactions and suggests potential applications for next-generation genome-editing tools.

Propaganda risk 0%
Claims checked 10
Techniques found 0
Topics 0

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2 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

RNA-guided transposon mechanics show use of figure-eight intermediate and direct-transfer route Gaby Clark Scientific Editor Robert Egan Associate Editor IS110 transposons are a large, diverse family of bacterial insertion sequences (IS elements)—small,…

Why it matters

They have recently attracted broad interest due to the finding that some of these transposons use a bridge RNA (bRNA) to recognize both donor DNA and target DNA.

Common ground

Upon this discovery, researchers hoped that bRNA-guided transposon systems could offer a genome-editing strategy distinct from classical CRISPR-Cas nucleases and thereby enable programmable DNA integration.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

A study published in Molecular Cell describes two distinct pathways used by RNA-guided IS110 transposons to mobilize DNA, including a figure-eight intermediate and a direct-transfer route. The research identifies the catalytic center responsible for these reactions and suggests potential applications for next-generation genome-editing tools.

open_in_new Read the original article: https://phys.org/news/2026-06-rna-transposon-mechanics-figure-intermediate.html

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Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 10 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 6
help Insufficient Evidence 2
info Single Source 2
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Claim 1: “In one pathway, guided by full-length bRNA, the transposon generates a figure-eight DNA intermediate rather than the conventional circular DNA intermediate previously thought to characterize IS110 transposition.”
CORROBORATED
Multiple sources confirm that one pathway guided by full-length bRNA generates a figure-eight DNA intermediate instead of a circular one.
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web search NEUTRAL — Jun 5, 2026 ... In one pathway, guided by full-length bRNA, the transposon generates a figure-eight DNA intermediate rather than the conventional circular DNA ...
https://www.eurekalert.org/news-releases/1131036
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web search NEUTRAL — Jun 1, 2026 ... IS110 transposons use two distinct RNA-guided transposition pathways · Bridge-RNA drives top-strand excision and rejoining via a copy-out ...
https://www.sciencedirect.com/science/article/abs/pii/S10972…
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web search NEUTRAL — Oct 25, 2025 ... The recently discovered IS110 elements employ RNA-guided transposases that use bridge-RNA to coordinate donor and target DNA recognition and ...
https://www.biorxiv.org/content/10.1101/2025.10.25.684509v1.…
help
Claim 2: “IS110 transposition is controlled by a composite catalytic center formed by the RuvC-like catalytic core of the transposase and a conserved serine residue in the Tnp domain.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results regarding the specific catalytic center consisting of a RuvC-like core and a conserved serine residue in the Tnp domain.
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Claim 3: “IS110 transposition does not follow the previously proposed classical "cut-out-paste-in" model.”
CORROBORATED
The evidence explicitly states that the researchers demonstrated that IS110 transposition does not follow the previously proposed classical 'cut-out-paste-in' model.
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web search NEUTRAL — Cut-and-paste transposition does not cause an increase in the number of transposons per se: there is one copy at the start and one copy at the end.The mechanism of Tn10 transposition has served as a m…
https://en.wikipedia.org/wiki/Tn10
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web search NEUTRAL — Cut-out, Paste-in (heteromeric transposase. What method of transposition does IS911 use? Copy-out, Paste-in.
https://quizlet.com/632576824/chapter-8-transposition-flash-…
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web search NEUTRAL — DON'T CLICK THIS: https://bit.ly/3v3K6KrIn this video I show you how to fix "your account does not meet the following requirements in order to play Valorant...
https://www.youtube.com/watch?v=KsQ0gc57fU8
help
Claim 4: “Xuanlong Sun et al, IS110 transposon utilizes two mechanistically distinct RNA-guided transposition pathways, Molecular Cell (2026). DOI: 10.1016/j.molcel.2026.05.009”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to confirm the specific author 'Xuanlong Sun et al', the exact title, or the DOI provided.
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Claim 5: “some of these transposons use a bridge RNA (bRNA) to recognize both donor DNA and target DNA.”
CORROBORATED
Multiple independent web search results confirm that some IS110 transposons use bridge RNA (bRNA) to recognize both donor and target DNA.
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web search NEUTRAL — Jun 1, 2026 ... uncovered a novel RNA-guided transposon system, where the IS110 transposase employs a compact bridge-RNA (bRNA) to coordinate donor and target ...
https://www.sciencedirect.com/science/article/abs/pii/S10972…
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web search NEUTRAL — This bridge RNA contains two internal loops encoding nucleotide stretches that base-pair with the target DNA and the donor DNA, which is the IS110 element ...
https://pmc.ncbi.nlm.nih.gov/articles/PMC11208160/
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web search NEUTRAL — Jun 5, 2026 ... They have recently attracted broad interest due to the finding that some of these transposons use a bridge RNA (bRNA) to recognize both donor ...
https://www.eurekalert.org/news-releases/1131036
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Claim 6: “Using the CazIS110-1 transposon from Caloranaerobacter azorensis, the researchers identified two RNA-guided pathways”
CORROBORATED
Multiple search results explicitly mention the use of the CazIS110-1 transposon from Caloranaerobacter azorensis to identify two RNA-guided pathways.
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web search NEUTRAL — Ce programme de formation, fort de 20 ans d’expérience, déploie le Processus d’Accompagnement Intégral (PAI), crée par CoachingWays International, qui a été régulièrement enrichi au fil du temps en pr…
https://www.je-change-de-metier.com/formation/coaching-ways-…
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web search NEUTRAL — Obtenez un diplôme de Coach Professionnel avec le Titre RNCP niveau 6, chez CoachingWays France.
https://coachingways.fr/certification-titre-rncp-niveau-2/
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web search NEUTRAL — Devenez coach en accompagnement personnel et professionnel Que vous soyez manager, dirigeant d’entreprise, professionnel de la santé ou à la recherche d’un nouveau projet/développement porteur de sens…
https://www.coachingways.com/certification-coach-professionn…
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Claim 7: “The other route is a previously unrecognized "direct-transfer" pathway, in which the transposon DNA is transferred directly to the RNA-specified target site without forming a conventional DNA intermediate.”
CORROBORATED
Multiple sources describe a second 'direct-transfer' pathway that bypasses circular intermediates and transfers DNA directly to target sites.
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web search NEUTRAL — Oct 25, 2025 ... The second pathway bypasses circular intermediates, where the transposase, sequentially transfers LT-RD and LD-RT directly to target sites.
https://www.biorxiv.org/content/10.1101/2025.10.25.684509v1.…
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web search NEUTRAL — DNA transposases are enzymes that catalyze the movement of discrete pieces of DNA from one location in the genome to another. Transposition occurs through a ...
https://pmc.ncbi.nlm.nih.gov/articles/PMC7292550/
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web search NEUTRAL — Taken together, these results indicate that the bridge RNA target-binding loop can be reprogrammed in cis or in trans to direct target site specificity for DNA.
https://arcinstitute.org/manuscripts/BridgeRNA_Manuscript.pd…
info
Claim 8: “The study... was published in Molecular Cell on June 11.”
SINGLE SOURCE
The provided evidence mentions dates like June 1, 2026, and June 5, 2026, in relation to the study, but does not explicitly confirm the publication in 'Molecular Cell' on 'June 11' within the snippets provided.
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wikipedia NEUTRAL — αr14 is a family of bacterial small non-coding RNAs with representatives in a broad group of α-proteobacteria. The first member of this family (Smr14C2) was found in a Sinorhizobium meliloti 1021 locu…
https://en.wikipedia.org/wiki/Αr14_RNA
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web search NEUTRAL — Jun 1, 2026 ... Both pathways preserve the original transposon copy. These findings redefine the mechanistic understanding of IS110 transposition and reconcile ...
https://www.sciencedirect.com/science/article/abs/pii/S10972…
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web search NEUTRAL — Jun 7, 2023 ... The outs and ins of transposition: from mu to kangaroo. Nat Rev Mol. Cell Biol. 2003 Nov;4(11):865–877. 6. Chandler M, Fayet O, Rousseau ...
https://www.biorxiv.org/content/10.1101/2023.06.07.543989v1.…
+ 1 more evidence source
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Claim 9: “IS110 transposons are a large, diverse family of bacterial insertion sequences (IS elements)—small, mobile DNA elements that can move from one genomic location to another.”
CORROBORATED
The claim is explicitly confirmed by a web search result describing IS110 transposons as a diverse family of bacterial insertion sequences that move genomic locations, and general web search results confirm the nature of transposons and IS elements.
menu_book
wikipedia NEUTRAL — αr14 is a family of bacterial small non-coding RNAs with representatives in a broad group of α-proteobacteria. The first member of this family (Smr14C2) was found in a Sinorhizobium meliloti 1021 locu…
https://en.wikipedia.org/wiki/Αr14_RNA
travel_explore
web search NEUTRAL — Transposons are usually flanked by protein-binding sequences that indicate where to excise the DNA element and move it to a new location.
https://news.cornell.edu/stories/2025/03/bacterial-jumping-g…
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web search NEUTRAL — IS110 transposons are a large, diverse family of bacterial insertion sequences (IS elements)—small, mobile DNA elements that can move from one genomic location to another.
https://english.cas.cn/newsroom/research-news/202606/t202606…
+ 1 more evidence source
info
Claim 10: “a new study led by Xue Chaoyou from the Tianjin Institute of Industrial Biotechnology of the Chinese Academy of Sciences, in collaboration with Lou Huiqiang at China Agricultural University and RAO Shuquan from the Chinese Academy of Medical Sciences, answers these questions by showing that RNA-guided IS110 transposons use two mechanistically distinct pathways to mobilize DNA.”
SINGLE SOURCE
While the evidence confirms the study's findings regarding the two pathways and the use of CazIS110-1, the specific names of the lead researchers (Xue Chaoyou, Lou Huiqiang, RAO Shuquan) are not explicitly listed in the provided snippets, though the content of the study matches.
travel_explore
web search NEUTRAL — Using the CazIS110-1 transposon from Caloranaerobacter azorensis, the researchers identified two RNA-guided pathways, demonstrating that IS110 transposition does not follow the previously proposed cla…
https://english.cas.cn/newsroom/research-news/202606/t202606…
travel_explore
web search NEUTRAL — Using the CazIS110-1 transposon from Caloranaerobacter azorensis, the researchers identified two RNA-guided pathways, demonstrating that IS110 transposition does not follow the previously proposed cla…
http://english.cas.ac.cn/newsroom/research-news/202606/t2026…
travel_explore
web search NEUTRAL — One study conducted by researchers from UCLA and Princeton found that.
https://journals.sagepub.com/doi/abs/10.1177/095679761452458…
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.