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| Natura: | Artículo científico |
| Lingua: | en |
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Environmental microbiology reports
2026
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| Accesso online: | https://pubmed.ncbi.nlm.nih.gov/41521568/ |
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| _version_ | 1868266100237533184 |
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| author | Che, Yuzan Zhang, Wenyan Dong, Yi Liu, Min Xiao, Tian Zhang, Jin-Yong Pan, Hongmiao |
| author_facet | Che, Yuzan Zhang, Wenyan Dong, Yi Liu, Min Xiao, Tian Zhang, Jin-Yong Pan, Hongmiao Che, Yuzan Zhang, Wenyan Dong, Yi Liu, Min Xiao, Tian Zhang, Jin-Yong Pan, Hongmiao |
| collection | PubMed - marine biology |
| contents | Characterization and Phylogenetic Analysis of a Novel Uncultivated Magnetotactic Coccus Harbouring Multi-Chain Magnetosomes. Che, Yuzan Zhang, Wenyan Dong, Yi Liu, Min Xiao, Tian Zhang, Jin-Yong Pan, Hongmiao Magnetosomes Phylogeny Geologic Sediments China Multigene Family Genome, Bacterial Whole Genome Sequencing Magnetotactic bacteria (MTB) are a diverse group of microorganisms that synthesize intracellular magnetic nanocrystals termed magnetosomes. In this study, a novel marine magnetotactic coccus, designated strain HHB-1, was magnetically enriched from intertidal sediments in Houhai Bay, southern China. Optical microscopy, electron microscopy and elemental analysis revealed that HHB-1 cells are relatively large coccoid-ovoid bacteria (3.9 ± 0.3 μm × 2.8 ± 0.2 μm) containing multiple chains of prismatic magnetite magnetosomes and prominent intracellular Ca/Mg-rich polyphosphate (Ca-Mg-polyP) granules. Whole-genome sequencing and phylogenomic analyses revealed that HHB-1 represents a novel and deeply branching lineage within the order Magnetococcales, exhibiting low average amino acid identity (57.3%-58.7%) with previously reported strains. The magnetosome gene cluster (MGC) of HHB-1 comprises a nearly complete set of mam (magnetosome membrane) genes with conserved gene order and structure, representing the first genomic and MGC characterization of a novel magnetococcus possessing multi-chain magnetosomes. These findings expand our understanding of the diversity, biomineralization strategies and evolutionary history of MTB in marine environments. |
| format | Artículo científico |
| id | pubmed_41521568 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Environmental microbiology reports |
| record_format | pubmed |
| spellingShingle | Characterization and Phylogenetic Analysis of a Novel Uncultivated Magnetotactic Coccus Harbouring Multi-Chain Magnetosomes. Che, Yuzan Zhang, Wenyan Dong, Yi Liu, Min Xiao, Tian Zhang, Jin-Yong Pan, Hongmiao Magnetosomes Phylogeny Geologic Sediments China Multigene Family Genome, Bacterial Whole Genome Sequencing Characterization and Phylogenetic Analysis of a Novel Uncultivated Magnetotactic Coccus Harbouring Multi-Chain Magnetosomes. Che, Yuzan Zhang, Wenyan Dong, Yi Liu, Min Xiao, Tian Zhang, Jin-Yong Pan, Hongmiao Magnetosomes Phylogeny Geologic Sediments China Multigene Family Genome, Bacterial Whole Genome Sequencing Magnetotactic bacteria (MTB) are a diverse group of microorganisms that synthesize intracellular magnetic nanocrystals termed magnetosomes. In this study, a novel marine magnetotactic coccus, designated strain HHB-1, was magnetically enriched from intertidal sediments in Houhai Bay, southern China. Optical microscopy, electron microscopy and elemental analysis revealed that HHB-1 cells are relatively large coccoid-ovoid bacteria (3.9 ± 0.3 μm × 2.8 ± 0.2 μm) containing multiple chains of prismatic magnetite magnetosomes and prominent intracellular Ca/Mg-rich polyphosphate (Ca-Mg-polyP) granules. Whole-genome sequencing and phylogenomic analyses revealed that HHB-1 represents a novel and deeply branching lineage within the order Magnetococcales, exhibiting low average amino acid identity (57.3%-58.7%) with previously reported strains. The magnetosome gene cluster (MGC) of HHB-1 comprises a nearly complete set of mam (magnetosome membrane) genes with conserved gene order and structure, representing the first genomic and MGC characterization of a novel magnetococcus possessing multi-chain magnetosomes. These findings expand our understanding of the diversity, biomineralization strategies and evolutionary history of MTB in marine environments. |
| title | Characterization and Phylogenetic Analysis of a Novel Uncultivated Magnetotactic Coccus Harbouring Multi-Chain Magnetosomes. |
| topic | Magnetosomes Phylogeny Geologic Sediments China Multigene Family Genome, Bacterial Whole Genome Sequencing |
| url | https://pubmed.ncbi.nlm.nih.gov/41521568/ |