S. W. Chisholm

Global niche partitioning of purine and pyrimidine cross-feeding among ocean microbes

The paper identifies purine and pyrimidine cross-feeding networks among ocean microbes, revealing niche partitioning and potential cryptic nitrogen cycles driven by Prochlorococcus and SAR11 interactions.

Novel isolates expand the physiological diversity of Prochlorococcus and illuminate its macroevolution

The paper isolates and characterizes four new Prochlorococcus strains, revealing physiological and genomic features that expand the understanding of its macroevolutionary history.

Chitin degradation by Synechococcus WH7803

The paper identifies ChiA as the chitinase enzyme responsible for chitin degradation in Synechococcus WH7803 using CRISPR-mediated loss-of-function mutants.

Metabolite diversity among Prochlorococcus strains belonging to divergent ecotypes

This study profiles metabolite diversity across three Prochlorococcus ecotypes, revealing strain-specific differences in intracellular and extracellular metabolite accumulation and release.

Chitin utilization by marine picocyanobacteria and the evolution of a planktonic lifestyle

This study shows marine picocyanobacteria utilize chitin, linking their planktonic lifestyle evolution to chitin degradation and ecological expansion.

Environmental and taxonomic drivers of bacterial extracellular vesicle production in marine ecosystems

This paper investigates how environmental and taxonomic factors influence bacterial extracellular vesicle production in marine ecosystems, showing significant variation across species and environmental conditions.

Production and cross-feeding of nitrite within Prochlorococcus populations

The paper investigates nitrite production and cross-feeding in Prochlorococcus strains during nitrate assimilation, revealing metabolic partnerships that may influence ocean nutrient cycles.

Siderophores as an iron source for Prochlorococcus in deep chlorophyll maximum layers of the oligotrophic ocean

The paper shows that Prochlorococcus in iron-depleted regions uses siderophores for iron uptake, with this trait more common in the North Pacific than the North Atlantic.

Novel integrative elements and genomic plasticity in ocean ecosystems

The paper identifies tycheposons, mobile genetic elements in Prochlorococcus, that drive genomic plasticity through gene exchange and contribute to microbial adaptation in ocean ecosystems.

Prochlorococcus extracellular vesicles: Molecular composition and adsorption to diverse microbes

This study analyzes the molecular composition of Prochlorococcus extracellular vesicles and their interactions with other microbes, revealing their potential roles in oceanic biogeochemical processes.

Phosphonate production by marine microbes: exploring new sources and potential function

This study identifies phosphonate biosynthesis in marine microbes, showing its prevalence in diverse lineages and potential role in reducing grazing and viral mortality.

Coping with darkness: The adaptive response of marine picocyanobacteria to repeated light energy deprivation

This study shows Prochlorococcus and Synechococcus can adapt to repeated light deprivation, with an epigenetic mechanism involved, though no DNA methylation was detected in the tested strain.

Microbial Diversity of Co-occurring Heterotrophs in Cultures of Marine Picocyanobacteria

The paper examines microbial diversity in cultures of marine picocyanobacteria, finding that heterotroph community composition varies with host ecotype and isolation conditions, while some bacteria are consistently abundant.

Association of lanthipeptide genes with TnpAREP transposases in marine picocyanobacteria

The paper investigates the association between lanthipeptide genes and TnpAREP transposases in marine picocyanobacteria, suggesting a potential diversifying recombination mechanism for prochlorosin expansion.

Frequency of mispackaging of Prochlorococcus DNA by cyanophage

The paper examines mispackaging of Prochlorococcus DNA by three cyanophages, finding distinct frequencies influenced by growth conditions and cellular factors.

Toward a genetic system in the marine cyanobacterium Prochlorococcus

This paper reports unsuccessful attempts to develop genetic transformation methods for Prochlorococcus and describes progress in optimizing electroporation parameters and protocols for axenic colony formation and cell viability assessment.

Emergence of trait variability through the lens of nitrogen assimilation in Prochlorococcus

The paper examines nitrate assimilation gene distribution across Prochlorococcus genomes to understand evolutionary mechanisms shaping trait variability in microbial species.

Co-culture and biogeography of Prochlorococcus and SAR11

This study co-cultures Prochlorococcus and SAR11 isolates to examine their interactions and biogeography, finding SAR11 grows faster with Prochlorococcus but not vice versa, and Prochlorococcus meets SAR11's carbon needs.