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            <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset/928203.rdf" xlink:actuate="onRequest">Thalassiosira pseudonana CCMP1335 endometabolite uptake by Ruegeria pomeroyi DSS-3</gmx:Anchor>
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            <gco:CharacterString>Cite this dataset as: Olofsson, M., Uchimiya, M., Smith, C., Moran, M. A. (2025) Thalassiosira pseudonana CCMP1335 endometabolite uptake by Ruegeria pomeroyi DSS-3. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2025-03-06 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.928203.1 [access date]</gco:CharacterString>
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        <gco:CharacterString>endometabolite uptake by Ruegeria pomeroyi DSS-3 Dataset Description: &amp;lt;p&amp;gt;All the raw spectra, NMRPipe scripts for spectrum processing, and MATLAB scripts for data analysis are deposited in Metabolomics Workbench under Project ID PR001837 (see related datasets).&amp;lt;/p&amp;gt;

&amp;lt;div&amp;gt;&amp;amp;nbsp;&amp;lt;/div&amp;gt; Methods and Sampling: &amp;lt;p&amp;gt;Temperature experiment: Axenic cultures of the diatom Thalassiosira pseudonana CCMP1335 (National Center for Marine Algae) were acclimated to three temperature conditions (below optimal: 14°C, optimal: 20°C, and above optimal: 28°C) for three months with weekly transfers (approximately 120 generations) in L1 medium with 35 ppt artificial seawater under 120 µmol photons m-2 s-1 (ULM-500 Light Meter, Walz) and a 16:8 h light:dark cycle. Diatom cultures were stepwise limited by B12 through three transfers. Ruegeria pomeroyi DSS-3&amp;amp;nbsp; was grown overnight in ½ YTSS medium, harvested in exponential growth phase, washed five times in sterile artificial seawater at 6,000 RCF, and&amp;amp;nbsp; inoculated into diatom flasks with 4 replicates per acclimation temperature. Flasks were harvested at late exponential growth phase on days 3 (28°C), 4 (20°C), and 6 (14°C), with sampling occurring 7 h into the light cycle.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;From axenic and inoculated flasks, cultures were sequentially filtered through 2.0 µm-pore-size Isopore filters (Millipore, Burlington, MA) and 0.2 µm-pore-size Supor filters (PALL, Port Washington, NY) to collect 600 ml for diatom endometabolits analysis,&amp;amp;nbsp; bacterial cells for RNA extraction. RNA filters were immediately flash-frozen in liquid nitrogen and stored at -80°C until processing.&amp;amp;nbsp; RNA was subsequently extracted from filters using the ZymoBIOMICS RNA Miniprep Kit (Zymo Research, Irvine, CA, USA) according to the manufacturer’s protocol.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Stranded RNASeq libraries were prepared by the Joint Genome Institute (JGI) and sequenced on an Illumina NovaSeq.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Metabolites were analyzed by NMR spectroscopy using a 600 MHz AVANCE III HD instrument (Bruker) equipped with a 5 mm TCI cryoprobe and pulse programs of 1H-13C heteronuclear single quantum correlation (HSQC, hsqcetgpprsisp2.2 by Bruker nomenclature) and 1H-13C HSQC-total correlation spectroscopy (HSQC-TOCSY, hsqcdietgpsisp.2). TopSpin (Bruker) version 3.5 was used for NMR operation. Data were processed by NMRPipe.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Peak intensity was extracted by rNMR version 1.11 and data were analyzed by MATLAB (MathWorks) version R2023b. Peak intensity was normalized by biovolume and auto-scaled. Metabolites were annotated based on chemical shift (HSQC) and correlation information (HSQC-TOCSY). Chemical shift values for candidate peaks were obtained from the Biological Magnetic Resonance Data Bank and the Human Metabolome Database, and raw reference spectra from BMRB were used for validation.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Draw down experiment: Thalassiosira pseudonana CCMP1335 cells harvested from axenic flasks were rinsed from thawed filters into 10 ml sterile L1 medium, sonicated to lyse cells, and passed through a pre-combusted GF/F filter. Ruegeria pomeroyi DSS-3 was inoculated into a 2.7 ml aliquot of concentrated endometabolomes and grown for 10 h in 96-well plates with shaking at 30°C in dark conditions. Subsamples of 1 ml were collected at inoculation and at the end of the experiment for metabolite quantification. From these subsamples, 540 µl were mixed with 60 µL of the phosphate buffer and transferred to NMR tubes. Metabolites were analyzed by NMR spectroscopy using a 600 MHz AVANCE III HD instrument (Bruker) equipped with a 5 mm TCI cryoprobe and pulse programs of 1H-13C heteronuclear single quantum correlation (HSQC, hsqcetgpprsisp2.2 by Bruker nomenclature) and 1H-13C HSQC-total correlation spectroscopy (HSQC-TOCSY, hsqcdietgpsisp.2). TopSpin (Bruker) version 3.6.4 was used for NMR operation.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Data were processed by NMRPipe. Peak intensity was extracted by rNMR version 1.11 and data were analyzed by MATLAB (MathWorks) version R2023b. Peak intensity was normalized by biovolume and auto-scaled. Metabolites were annotated based on chemical shift (HSQC) and correlation information (HSQC-TOCSY). Chemical shift values for candidate peaks were obtained from the Biological Magnetic Resonance Data Bank and the Human Metabolome Database, and raw reference spectra from BMRB were used for validation.&amp;lt;/p&amp;gt;</gco:CharacterString>
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        <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/award/835240.rdf" xlink:title="OCE-1948104" xlink:actuate="onRequest">Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1948104 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1948104</gmx:Anchor>
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&amp;lt;p&amp;gt;From axenic and inoculated flasks, cultures were sequentially filtered through 2.0 µm-pore-size Isopore filters (Millipore, Burlington, MA) and 0.2 µm-pore-size Supor filters (PALL, Port Washington, NY) to collect 600 ml for diatom endometabolits analysis,&amp;amp;nbsp; bacterial cells for RNA extraction. RNA filters were immediately flash-frozen in liquid nitrogen and stored at -80°C until processing.&amp;amp;nbsp; RNA was subsequently extracted from filters using the ZymoBIOMICS RNA Miniprep Kit (Zymo Research, Irvine, CA, USA) according to the manufacturer’s protocol.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Stranded RNASeq libraries were prepared by the Joint Genome Institute (JGI) and sequenced on an Illumina NovaSeq.&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Metabolites were analyzed by NMR spectroscopy using a 600 MHz AVANCE III HD instrument (Bruker) equipped with a 5 mm TCI cryoprobe and pulse programs of 1H-13C heteronuclear single quantum correlation (HSQC, hsqcetgpprsisp2.2 by Bruker nomenclature) and 1H-13C HSQC-total correlation spectroscopy (HSQC-TOCSY, hsqcdietgpsisp.2). TopSpin (Bruker) version 3.5 was used for NMR operation. Data were processed by NMRPipe.&amp;lt;/p&amp;gt;

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&amp;lt;p&amp;gt;Draw down experiment: Thalassiosira pseudonana CCMP1335 cells harvested from axenic flasks were rinsed from thawed filters into 10 ml sterile L1 medium, sonicated to lyse cells, and passed through a pre-combusted GF/F filter. Ruegeria pomeroyi DSS-3 was inoculated into a 2.7 ml aliquot of concentrated endometabolomes and grown for 10 h in 96-well plates with shaking at 30°C in dark conditions. Subsamples of 1 ml were collected at inoculation and at the end of the experiment for metabolite quantification. From these subsamples, 540 µl were mixed with 60 µL of the phosphate buffer and transferred to NMR tubes. Metabolites were analyzed by NMR spectroscopy using a 600 MHz AVANCE III HD instrument (Bruker) equipped with a 5 mm TCI cryoprobe and pulse programs of 1H-13C heteronuclear single quantum correlation (HSQC, hsqcetgpprsisp2.2 by Bruker nomenclature) and 1H-13C HSQC-total correlation spectroscopy (HSQC-TOCSY, hsqcdietgpsisp.2). TopSpin (Bruker) version 3.6.4 was used for NMR operation.&amp;lt;/p&amp;gt;

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        </gmi:MI_Instrument>
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      <gmi:instrument>
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                <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/557097.rdf" xlink:title="Nuclear Magnetic Resonance Spectrometers" xlink:actuate="onRequest">Bruker 600 MHz AVANCE III HD</gmx:Anchor>
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            <gco:CharacterString>Bruker 600 MHz AVANCE III HD</gco:CharacterString>
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            <gco:CharacterString>PI Supplied Instrument Name: Bruker 600 MHz AVANCE III HD PI Supplied Instrument Description:Bruker 600 MHz AVANCE III HD instrument was used for NMR spectroscopy  Instrument Name: Nuclear Magnetic Resonance Spectrometers Instrument Short Name:NMR   Instrument Description: Instruments that identify and quantify magnetically active chemical entities by subjecting a sample to orthogonal magnetic and electrical fields. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/LAB18/</gco:CharacterString>
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</gmi:MI_Metadata>
