Shulei Sun results 17
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Precision measurement of the Ds*+-Ds+ meson mass differenceNARA Subscribed
Summary Microbes have obligate requirements for trace metals in metalloenzymes that catalyse important biogeochemical reactions. In anoxic methane‐ and sulphide‐rich environments, microbes may have unique adaptations for metal acquisition and utilization because of decreased bioavailability as a result of metal sulphide precipitation. However, micronutrient cycling is largely unexplored in cold (≤ 10° C ) and sulphidic (> 1 m...
Summary Bacterioplankton consume a large proportion of photosynthetically fixed carbon in the ocean and control its biogeochemical fate. We used an experimental metatranscriptomics approach to compare bacterial activities that route energy and nutrients during a phytoplankton bloom compared with non‐bloom conditions. mRNAs were sequenced from duplicate bloom and control microcosms 1 day after a phytoplankton biomass peak, and...
Analysis of sulfur‐related transcription by Roseobacter communities using a taxon‐specific functional gene microarrayNARA Subscribed
Summary The fraction of dissolved dimethylsulfoniopropionate (DMSPd) converted by marine bacterioplankton into the climate‐active gas dimethylsulfide (DMS) varies widely in the ocean, with the factors that determine this value still largely unknown. One current hypothesis is that the ratio of DMS formation : DMSP demethylation is determined by DMSP availability, with ‘availability’ in both an absolute sense (i.e. concentration...
Transporter genes expressed by coastal bacterioplankton in response to dissolved organic carbonNARA Subscribed
Summary Coastal ocean bacterioplankton control the flow of dissolved organic carbon (DOC) from terrestrial and oceanic sources into the marine food web, and regulate the release of inorganic carbon to atmospheric and offshore reservoirs. While the fate of the chemically complex coastal DOC reservoir has long been recognized as a critical feature of the global carbon budget, it has been problematic to identify both the compound...
Comparative day/night metatranscriptomic analysis of microbial communities in the North Pacific subtropical gyreNARA Subscribed
Summary Metatranscriptomic analyses of microbial assemblages ( Cyanobacteria contributed a greater percentage of the transcripts (54% of annotated sequences) than expected based on abundance (35% of cell counts and 21% 16S rRNA of libraries), and may represent the most actively transcribing cells in this surface ocean community in both the day and night. Major heterotrophic taxa contributing to the community transcriptome incl...
Summary An expanded analysis of oceanic metagenomic data indicates that the majority of prokaryotic cells in marine surface waters have the genetic capability to demethylate dimethylsulfoniopropionate (DMSP). The 1701 homologues of the DMSP demethylase gene, dmdA , identified in the (2007) Global Ocean Sampling (GOS) metagenome, are sufficient for 58% (±9%) of sampled cells to participate in this critical step in the marine su...
Transcriptional response of Silicibacter pomeroyi DSS‐3 to dimethylsulfoniopropionate (DMSP)NARA Subscribed
Summary Dimethylsufoniopropionate (DMSP) is an abundant organic sulfur compound in the ocean and an important substrate for marine bacterioplankton. The Roseobacter clade of marine alphaproteobacteria, including Silicibacter pomeroyi strain DSS‐3, are known to be involved in DMSP degradation in situ . The fate of DMSP has important implications for the global sulfur cycle, but the genes involved in this process and their regul...
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