H. Ogata

Genome-resolved year-round dynamics reveal a broad range of giant virus microdiversity

This study analyzes giant virus dynamics using metagenomic data, revealing year-round recovery and distinct population dynamics linked to microdiversity and niche breadth.

Extracellular rRNA profiling reveals the sinking and cell lysis dynamics of marine microeukaryotes

This study uses rRNA profiling to analyze cell lysis dynamics of marine microeukaryotes, finding higher lysis rates in the mesopelagic zone than in the epipelagic layer.

Spatiotemporal dynamics revealed the dark water community of giant virus from a deep freshwater lake

This study uses long-read metagenomics to reconstruct giant virus genomes from a freshwater lake, revealing new species and ecological roles in different water depths.

Allometric multi-scaling of weight-for-height relation in children and adolescents: Revisiting the theoretical basis of body mass index of thinness and obesity assessment

This study examines BMI's validity in children and adolescents, finding that multi-scaling occurs in younger ages but converges to uni-scaling near adulthood, suggesting BMI is less reliable for younger groups.

Eukaryotic genomic data uncover an extensive host range of mirusviruses

This study identifies mirusvirus markers in eukaryotic genomes, revealing a broader host range and greater diversity than previously known.

Complex genomes of early nucleocytoviruses revealed by ancient origins of viral aminoacyl-tRNA synthetases

The paper analyzes viral aminoacyl-tRNA synthetases (aaRSs) in nucleocytoviruses to determine their evolutionary origins and find that some predate the last common eukaryotic ancestor.

Global distribution and diversity of marine Parmales

This study analyzes the global distribution and diversity of Parmales using DNA metabarcoding data, revealing low abundance and diversity with clade-specific ecological adaptations.

Gene transfer among viruses substantially contributes to gene gain of giant viruses

The paper investigates viral horizontal gene transfer (vHGT) among nucleocytoviruses and finds it accounts for 28% to 42% of gene gain events in each viral order.

Characterization of sinking and suspended microeukaryotic communities in spring Oyashio waters

This study characterizes sinking and suspended microeukaryotic communities in Oyashio waters using 18S rDNA metabarcoding, revealing depth-related differences and functional roles in the biological carbon pump.

A 1.5 Mb continuous endogenous viral region in the arbuscular mycorrhizal fungus Rhizophagus irregularis

The paper identifies a 1.5 Mb viral region in Rhizophagus irregularis, suggesting recent infection by a dsDNA virus.

A rapid genome-wide analysis of isolated giant viruses only using MinION sequencing

This study demonstrates that MinION-only sequencing can accurately assemble giant virus genomes, enabling rapid genome-wide analysis of newly isolated viruses.

Genomic adaptation of giant viruses in polar oceans

This study investigates how giant viruses adapt to polar ocean environments by analyzing their biogeography and functional genes, finding that their adaptation is independent of host adaptation.

Global observation of plankton communities from space

The paper uses satellite data and machine learning to predict global plankton community distributions with 67% accuracy, outperforming temperature and chlorophyll a alone.

Genome analysis of Parmales, a sister group of diatoms, reveals the evolutionary specialization of diatoms from phago-mixotrophs to photoautotrophs

This study compares parmalean and diatom genomes to show diatoms evolved from phago-mixotrophs to photoautotrophs by losing phagocytosis genes and gaining silica and nutrient metabolism capabilities.

Plankton-infecting relatives of herpesviruses clarify the evolutionary trajectory of giant viruses

The paper identifies plankton-infecting herpesvirus relatives in marine environments, revealing a new viral phylum with evolutionary links to both herpesviruses and giant viruses.

Prevalence of viral frequency-dependent infection in coastal marine prokaryotes revealed using monthly time series virome analysis

The paper analyzes monthly virome and 16S rRNA data from Osaka Bay to show frequency-dependent viral infection in marine prokaryotes, regardless of host growth strategy.

RNA-seq of the medusavirus suggests remodeling of the host nuclear environment at an early infection stage

This paper uses RNA-seq to analyze medusavirus infection in amoebas, identifying temporal gene expression clusters and host transcriptional changes, suggesting early nuclear remodeling by the virus.

Discovery of viral myosin genes with complex evolutionary history within plankton

The paper discovers myosin genes in NCLDVs, suggests their role in viral transport, and identifies multiple horizontal transfers of these genes between viruses and eukaryotes.

Ocean-wide comparisons of mesopelagic planktonic community structures

This study compares mesopelagic planktonic community structures across different oxygen conditions and identifies environmental drivers and community modules.

Year-round dynamics of amplicon sequence variant communities differ among eukaryotes, Mimiviridae, and prokaryotes in a coastal ecosystem

A one-year observation of coastal microbial communities revealed similar but different community dynamics for eukaryotes, a group of large viruses, and prokaryotes.

Quantitative assessment of NCLDV-host interactions predicted by co-occurrence analyses

This study uses co-occurrence analyses to predict NCLDV hosts from Tara Oceans data, showing improved performance with a phylogeny-informed method.

Eukaryotic virus composition can predict the efficiency of carbon export in the global ocean

This study links viral community composition to carbon export efficiency in the global ocean, finding that viral marker genes explain 67% of variation in CEE.

A persistent giant algal virus, with a unique morphology, encodes an unprecedented number of genes involved in energy metabolism

This paper describes a giant algal virus with a unique morphology and an unprecedented number of genes involved in energy metabolism, including enzymes from the TCA cycle and β-oxidation pathway.

Giant viruses encode novel types of actins possibly related to the origin of eukaryotic actin: the viractins

The paper identifies actin-related genes in giant viruses, suggesting a possible evolutionary link between viral actins and eukaryotic actin origins.

Genome-resolved viral and cellular metagenomes revealed potential key virus-host interactions in a deep freshwater lake

This study analyzes metagenomic data from a freshwater lake to identify viral-host interactions and diversity patterns in viral and bacterial communities.

Metabolic Architecture of the Deep Ocean Microbiome

The paper analyzes deep ocean microbial metagenomes to reveal functional diversity and metabolic strategies in the dark ocean.