What does this research mean for the field?

Retrons exhibit extensive taxonomic and ecological structuring across microbial metagenomes and include previously unrecognized, protease-independent type XI-like lineages with distinct accessory modules. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To comprehensively map the diversity, ecological distribution, and genomic architectures of bacterial retron reverse transcriptases across a large-scale representative metagenome dataset.

September 14, 2026mSystemsOpen Access

Landscape of retron diversity across the SPIRE microbial metagenome resource reveals candidate novel type XI-like lineages

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Authors

NTNicolás Toro

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Overview

Metagenomic survey uncovers novel type XI-like lineages across diverse microbial habitats, highlighting expanded architectural diversity for biotechnological engineering.

Key Points

To comprehensively map the diversity, ecological distribution, and genomic architectures of bacterial retron reverse transcriptases across a large-scale representative metagenome dataset.
Screened a non-redundant, species-level metagenomic dataset spanning over 100,000 processed microbial metagenomes (SPIRE collection) using curated type-specific hidden Markov models.
Evaluated retron taxonomic and ecological distribution patterns across environmental categories.
Conducted de novo covariance-based analyses to detect non-coding msr/msd-like RNA structures in novel lineages.
Identified thousands of retrons across all canonical types and discovered divergent lineages structured strongly by microbial taxonomy and ecological niche.
Uncovered two candidate type XI-like lineages (TXI_C2like and TXI_noncan_h) characterized by protease-independent architectures and novel accessory modules containing WYL- and DnaB_C-associated domains.
Confirmed the conservation of canonical reverse transcriptase–non-coding RNA organizational frameworks despite extensive sequence divergence.

Cite This Study

Nicolás Toro (2026) studied this question.

synapsesocial.com/papers/6aa7b2c70926e14a848b1482 https://doi.org/10.1128/msystems.00732-26

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September 14, 2026mSystemsOpen Access

Landscape of retron diversity across the SPIRE microbial metagenome resource reveals candidate novel type XI-like lineages

View Full Paper

Ask AI

Bookmark

Authors

NTNicolás Toro

Discussion

Member takes

Overview

Metagenomic survey uncovers novel type XI-like lineages across diverse microbial habitats, highlighting expanded architectural diversity for biotechnological engineering.

Key Points

To comprehensively map the diversity, ecological distribution, and genomic architectures of bacterial retron reverse transcriptases across a large-scale representative metagenome dataset.
Screened a non-redundant, species-level metagenomic dataset spanning over 100,000 processed microbial metagenomes (SPIRE collection) using curated type-specific hidden Markov models.
Evaluated retron taxonomic and ecological distribution patterns across environmental categories.
Conducted de novo covariance-based analyses to detect non-coding msr/msd-like RNA structures in novel lineages.
Identified thousands of retrons across all canonical types and discovered divergent lineages structured strongly by microbial taxonomy and ecological niche.
Uncovered two candidate type XI-like lineages (TXI_C2like and TXI_noncan_h) characterized by protease-independent architectures and novel accessory modules containing WYL- and DnaB_C-associated domains.
Confirmed the conservation of canonical reverse transcriptase–non-coding RNA organizational frameworks despite extensive sequence divergence.

Cite This Study

Nicolás Toro (2026) studied this question.

synapsesocial.com/papers/6aa7b2c70926e14a848b1482 https://doi.org/10.1128/msystems.00732-26

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