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Adaptation to deep-sea chemosynthetic environments as revealed by mussel genomes
The genomes of a deep-sea vent/seep mussel and a shallow-water mussel are reported, revealing presumed genetic adaptation of theDeep-sea mussel to the presence of its chemoautotrophic endosymbionts and wider insights into the mechanisms of symbiosis in other organisms such as deep- sea tubeworms and giant clams are given.
Genomic, transcriptomic, and proteomic insights into the symbiosis of deep-sea tubeworm holobionts
The results reveal the interdependence of the tubeworm holobiont through mutual nutrient supply, a pathogen-type regulatory mechanism, and host-symbiont cooperation in energy utilization and nutrient production, which is a key adaptation allowing the Tubeworm to thrive in deep-sea chemosynthetic environments.
Phylogeny, evolution and mitochondrial gene order rearrangement in scale worms (Aphroditiformia, Annelida).
- Yanjie Zhang, J. Sun, +6 authors J. Qiu
- Medicine, BiologyMolecular phylogenetics and evolution
- 1 August 2018
This study provided more evidence for reconstruction of the phylogeny of Aphroditiformia, provided evidence to refute the assumption that mitochondrial gene order in Errantia is conserved, and indicated that the deep-sea extreme environment may have affected the mitochondrial genome evolution rate and gene order arrangement in Polynoidae.
Sexually Dimorphic Scale Worms (Annelida: Polynoidae) From Hydrothermal Vents in the Okinawa Trough: Two New Species and Two New Sex Morphs
Sequencing of the cytochrome oxidase I (COI) gene in these four species confirmed the sexual dimorphism in vent polynoids for the first time, and provided reliable barcoding sequences for identifying these polychaetes.
The mitochondrial genome of the deep-sea glass sponge Lophophysema eversa (Porifera, Hexacinellida, Hyalonematidae)
- Yanjie Zhang, J. Sun, Xinzheng Li, J. Qiu
- Biology, MedicineMitochondrial DNA. Part A, DNA mapping…
- 3 March 2016
A nearly complete mitochondrial genome from the glass sponge Lophophysema eversa is reported, the second mitogenome in the order Amphidiscosida and the ninth in the class Hexactinellida, and will contribute to a better understanding of the phylogeny of glass sponges.
Adaptation and evolution of deep-sea scale worms (Annelida: Polynoidae): insights from transcriptome comparison with a shallow-water species
This study reported the first two transcriptomes of deep-sea polynoids and compared them with the transcriptome of a shallow-water polynoid and determined codon and amino acid usage, positive selected genes, highly expressed genes and putative duplicated genes.
A New Species in the Marphysa sanguinea Complex (Annelida, Eunicidae) from Hong Kong.
Molecular analyses indicated that the cytochrome oxidase c subunit I gene and 16S RNA gene of Marphysa hongkongensa diverged from the corresponding sequence of the closest related species of MarPhysa in GenBank by 19.5% and 12.1%, respectively.
A new species of Hemiphyllodactylus (Squamata: Gekkonidae) from Hong Kong.
A new species of gekkonid, Hemiphyllodactylus hongkongensis sp. nov., is described based on a series of specimens collected from Hong Kong SAR, China. The new species can be distinguished from other…
Genomic Signatures Supporting the Symbiosis and Formation of Chitinous Tube in the Deep-Sea Tubeworm Paraescarpia echinospica
The chromosome-level genome of the vestimentiferan tubeworm Paraescarpia echinospica is reported, finding that the genome has been remodelled to facilitate symbiosis through the expansion of gene families related to substrate transfer and innate immunity, suppression of apoptosis, regulation of lysosomal digestion and protection against oxidative stress.
Sperm proteome of Mytilus galloprovincialis: Insights into the evolution of fertilization proteins in marine mussels
- Yanjie Zhang, Huawei Mu, Stanley C K Lau, Zhifeng Zhang, J. Qiu
- Biology, MedicineProteomics
- 1 July 2015
This study integrated public transcriptome datasets by de novo assembly, and applied SDS‐PAGE coupled LC‐MS/MS analysis to profile the sperm proteome, resulting in the identification of 550 proteins, consistent with previous reports of positive selection of several fertilization proteins in Mytilus.