Marine Sediments Illuminate Chlamydiae Diversity and Evolution.

Current Biology : CB
Jennah E. DharamshiThijs J. G. Ettema

Abstract

The bacterial phylum Chlamydiae is so far composed of obligate symbionts of eukaryotic hosts. Well known for Chlamydiaceae, pathogens of humans and other animals, Chlamydiae also include so-called environmental lineages that primarily infect microbial eukaryotes. Environmental surveys indicate that Chlamydiae are found in a wider range of environments than anticipated previously. However, the vast majority of this chlamydial diversity has been underexplored, biasing our current understanding of their biology, ecological importance, and evolution. Here, we report that previously undetected and active chlamydial lineages dominate microbial communities in deep anoxic marine sediments taken from the Arctic Mid-Ocean Ridge. Reaching relative abundances of up to 43% of the bacterial community, and a maximum diversity of 163 different species-level taxonomic units, these Chlamydiae represent important community members. Using genome-resolved metagenomics, we reconstructed 24 draft chlamydial genomes, expanding by over a third the known genomic diversity in this phylum. Phylogenomic analyses revealed several novel clades across the phylum, including a previously unknown sister lineage of the Chlamydiaceae, providing new insights into t...Continue Reading

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Citations

Sep 15, 2020·Science Advances·Courtney W StairsThijs J G Ettema
Aug 8, 2020·Frontiers in Immunology·Gabrielle Keb, Kenneth A Fields
Nov 7, 2020·Current Biology : CB·Stephan KöstlbacherMatthias Horn
Mar 26, 2020·Current Biology : CB·John A Fuerst
Jul 1, 2021·Nature Communications·Stephan KöstlbacherMatthias Horn
May 18, 2021·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Nicholas J MatzkeMatthew A B Baker
Sep 14, 2021·Applied Microbiology and Biotechnology·Luis Felipe Muriel-MillánLiliana Pardo-López
Sep 21, 2021·Frontiers in Microbiology·Arkadiy I GarberNancy Merino

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