Summary of study ST001356

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR000926. The data can be accessed directly via it's Project DOI: 10.21228/M80H4K This work is supported by NIH grant, U2C- DK119886.

See: https://www.metabolomicsworkbench.org/about/howtocite.php

This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.

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Study IDST001356
Study TitleDiel Metabolites in the North Pacific Subtropical Gyre (KM1513)
Study TypeDiel metabolomics
Study SummaryDiverse organisms within the marine microbial communities show 24-hour cycles of gene expression, likely driven by the need to harness energy from sunlight and to cope with dramatic fluctuations in solar radiation over the course of the day. Metabolites are the direct product of metabolic activity; they are therefore expected to both reflect and influence the daily cycle of the microbial community. Here we measure the intracellular metabolome of the microbial community of the North Pacific Subtropical Gyre, sampled at 4-hour intervals for 8 days. Concentrations of some metabolites common to many organisms exhibit diel periodicity, revealing synchrony of community-level metabolism. Comparing these data to gene expression data reveals temporal offsets between gene transcription and cellular activity, and ties some metabolites to the activities of specific organisms. For example, the dramatic fluctuations of the disaccharide trehalose likely reflect the daily cycles of {Crocosphaera}, a photosynthesizing cyanobacteria that needs to store energy during the day to fuel nighttime nitrogen-fixation. This study illustrates how pairing multiple types of 'omics and environmental data can provide insight into how the activities of individual organisms lead to community functions such as net primary productivity and nitrogen fixation.
Institute
University of Washington
DepartmentOceanography
LaboratoryIngalls Lab
Last NameBoysen
First NameAngela
Address1502 NE Boat St
Emailaboysen@uw.edu
Phone3037461944
Submit Date2020-03-23
Raw Data AvailableYes
Raw Data File Type(s).mzXML
Analysis Type DetailLC-MS
Release Date2020-07-21
Release Version1
Angela Boysen Angela Boysen
https://dx.doi.org/10.21228/M80H4K
ftp://www.metabolomicsworkbench.org/Studies/ application/zip

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Sample Preparation:

Sampleprep ID:SP001438
Sampleprep Summary:Each sample was extracted using a modified Bligh-Dyer extraction. Briefly, filters were cut up and split between two bead beating tubes containing a mixture of 100 µm and 400 µm silica beads. Heavy isotope-labeled internal standards were added along with 750 µL of cold aqueous solved (50:50 methanol:water) and 750 µL of cold organic solvent (dichloromethane). The samples were shaken on a FastPrep-24 Homogenizer for 30 seconds and chilled in a -20 °C freezer repeatedly for three cycles of bead-beating and a total of 30 minutes of chilling. The organic and aqueous layers were separated by spinning samples in a microcentrifuge at 5,000 rpm for 90 seconds at 4 °C. The aqueous layer was removed to a new glass centrifuge tube. The remaining organic fraction was rinsed three more times with additions of 750 µL of 50:50 methanol:water. All aqueous rinses were combined for each sample and dried down under N2 gas. The remaining organic layer was transferred into a clean glass centrifuge tube and the remaining bead beating tube was rinsed two more times with cold organic solvent. The combined organic rinses were centrifuged, transferred to a new tube, and dried under N2 gas. Dried aqueous fractions were re-dissolved in 380 µL of water. Dried organic fractions were re-dissolved in 380 µL of 1:1 water:acetonitrile. 20 µL of isotope-labeled injection standards in water were added to both fractions. Blank filters were extracted alongside samples as methodological blanks.
Sampleprep Protocol Filename:Ingalls_Metabolomics_Sample_Processing_2015.txt
Processing Storage Conditions:On ice
Extract Storage:-80℃
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