Metabolomics Workbench : NIH Data Repository

MB Sample ID: SA083171

Local Sample ID:	69-Synechocystis_6803-cell-26.5-3
Subject ID:	SU001262
Subject Type:	Bacteria
Subject Species:	Synechocystis sp. PCC 6803
Taxonomy ID:	1148
Genotype Strain:	NCBI:txid1148
Cell Biosource Or Supplier:	ATCC

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Subject:

Subject ID:	SU001262
Subject Type:	Bacteria
Subject Species:	Synechocystis sp. PCC 6803
Taxonomy ID:	1148
Genotype Strain:	NCBI:txid1148
Cell Biosource Or Supplier:	ATCC

Factors:

Local Sample ID	MB Sample ID	Factor Level ID	Level Value	Factor Name
69-Synechocystis_6803-cell-26.5-3	SA083171	FL012604	26.5	time

Collection:

Collection ID:	CO001256
Collection Summary:	For each metabolomics time-point, a 10 mL culture were rapidly sampled via sterile on-reactor syringes into a pre-weighed centrifuge tube, quenched in -4°C 1X PBS, spun at 3,000g for 5 min., decanted, frozen in liquid nitrogen, and lyophilized at -50°C. The workflow from sampling to centrifugation took < 2 minutes; lyophilized samples were stored at -80°C for < 1 month prior to extraction. A biphasic extraction from lyophilized cell pellets was performed via a 2:1:1.6 MTBE:MeOH:H2O biphasic extraction, modified from the protocol developed by Salem et al. (Salem et al., 2016) resulting in a top layer of MTBE with non-polar soluble metabolites, a lower layer of MeOH:H2O with polar and semi-polar soluble metabolites, and an insoluble pellet. Each liquid layer was transferred to a fresh glass vial and dried under nitrogen gas overnight. The MTBE layer was resuspended in 1:1 toluene:MeOH and analyzed via Q-TOF-MS with a UPLC Phenyl Hexyl column (“RP-MS”). The MeOH:H2O layer was resuspended in 1:1 H2O:MeOH, split evenly and subjected to either i) derivatization in methoxyamine HCl and MSTFA followed by GC-MS analysis, or ii) targeted SRM analysis on a tandem quadrupole-MS equipped with a HILIC column. The insoluble pellet was hydrolyzed with a hydrochloric acid (HCl) based on previously published protocols (Fountoulakis and Lahm, 1998) (Huang, Kaiser and Benner, 2012) to analyze individual amino acids, nucleoside, and carbohydrate content of the insoluble polymers utilizing MTBSTFA derivatization for insoluble amino acids. Of the soluble phases, 10 µL were removed from each sample and pooled to create a QC sample, mixed, and aliquoted into thirteen vials. A QC sample was run after every sixth injection.
Sample Type:	Bacterial cells

Treatment:

Treatment ID:	TR001277
Treatment Summary:	Synechocystis sp. PCC 6803 [N-1] (ATCC 27184, NCBI Taxonomy ID: 1080229) was utilized for all experiments. A light-emitting diode photobioreactor (LED PBR) was engineered to provide a rectified sinusoidal waveform light profile which (results in the negative half-cycle being set to zero) via two custom 4000K White LED panels (Reliance Laboratories, Port Townsend WA) arranged opposite a water bath facing inwards, 5% CO2 at 200 mL min-1 via in-house gas mixing and custom aerators to provide sufficient mixing, 27-30°C temperature control via a Huber Ministat and custom water bath (Midwest Custom Aquarium, Starbuck MN), and improved light penetration at high volumes via custom flat-panel reactors (FPRs) built in a circular geometry to maximize mixing (Allen Scientific Glass, Boulder CO) (Figure S1). At the peak, 1,600 mol photons m-2s-1 (E) was provided as measured by LightScout Quantum Meter (Model: 3415FXSE). . A single LED-PBR was inoculated and entrained to sinLD cycles for two days; this entrained culture was then use inoculated three biological triplicate FPRs in the LED PBR (Figure S2). Reactors were cultivated under the sinLD cycle profile for an additional day of entrainment prior to sampling (total of 3 days of entrainment).

Treatment ID:

TR001277

Treatment Summary:

Synechocystis sp. PCC 6803 [N-1] (ATCC 27184, NCBI Taxonomy ID: 1080229) was utilized for all experiments. A light-emitting diode photobioreactor (LED PBR) was engineered to provide a rectified sinusoidal waveform light profile which (results in the negative half-cycle being set to zero) via two custom 4000K White LED panels (Reliance Laboratories, Port Townsend WA) arranged opposite a water bath facing inwards, 5% CO2 at 200 mL min-1 via in-house gas mixing and custom aerators to provide sufficient mixing, 27-30°C temperature control via a Huber Ministat and custom water bath (Midwest Custom Aquarium, Starbuck MN), and improved light penetration at high volumes via custom flat-panel reactors (FPRs) built in a circular geometry to maximize mixing (Allen Scientific Glass, Boulder CO) (Figure S1). At the peak, 1,600 mol photons m-2s-1 (E) was provided as measured by LightScout Quantum Meter (Model: 3415FXSE). . A single LED-PBR was inoculated and entrained to sinLD cycles for two days; this entrained culture was then use inoculated three biological triplicate FPRs in the LED PBR (Figure S2). Reactors were cultivated under the sinLD cycle profile for an additional day of entrainment prior to sampling (total of 3 days of entrainment).

Sample Preparation:

Sampleprep ID:	SP001270
Sampleprep Summary:	Briefly, 6 mL of 75% methanol (MeOH) was added to pellets, vortexed, and transferred to glass vials. 9 mL of 100% methyl tert-butyl ether (MTBE) was added, vortexed for 30 seconds, placed on automatic shaker for 1.5 hours at 4 ºC, and sonicated for 15 minutes. 3.75 mL of water was added, each extraction was vortexed by hand for 1 minute, and centrifuged for 10 minutes at 3,270g at 4ºC. A biphasic solution with a pellet formed: the top, green MTBE layer and the bottom, clear MeOH:H2O layer were separated into separate tubes and dried under N2,gas overnight. The pellet was stored at -80 ºC. After drying, the MTBE layer was resuspended in 100 uL 1:1 toluene:MeOH, transferred to a LC-MS vial insert, and stored at -80C for <1 month prior to MS analysis. The MeOH:H2O layer was resuspended in 1 mL of 1:1 H2O:MeOH, transferred to a 1.7 mL centrifuge tube and spun at 15,000g for 2 minutes at 4 ºC. The supernatant was split into two 465 µL aliquots—one for GCMS and one for LC(HILIC)MS—in glass vials and dried under N2,gas. The protocol outlined above is suitable for filter-quenched cyanobacteria samples and centrifuged cell pellets. The polar methanol/water fraction resulting from the biphasic extraction was processed for analysis by hydrophilic interaction liquid chromatography (HILIC) LC-MS. Dried samples were resuspended in 100 µL 1:1 H2O:MeOH and 10 µL were aliquoted into a pooled QC sample. Samples were stored at -80 ºC until analysis. The pooled QC sample was mixed and aliquoted into twelve vials. A QC injection was run every tenth injection. The dried polar fraction for analysis by GC-MS was stored at -80 ºC until derivatization, immediately prior to MS analysis. Samples were derivatized in 30 uL methoxyamine HCl and 30 uL MSTFA, as specified in the following section. Ten microliters were removed from each sample to create a pooled QC sample, mixed, and aliquoted into thirteen vials. A QC sample was run after every sixth injection. The non-polar MTBE phase was processed for non-targeted LC-MS analysis. Twenty microliters from each sample were pooled, mixed, and aliquoted into thirteen pooled QC samples. QC injections were placed after every sixth injection.

Sampleprep ID:

SP001270

Sampleprep Summary:

Briefly, 6 mL of 75% methanol (MeOH) was added to pellets, vortexed, and transferred to glass vials. 9 mL of 100% methyl tert-butyl ether (MTBE) was added, vortexed for 30 seconds, placed on automatic shaker for 1.5 hours at 4 ºC, and sonicated for 15 minutes. 3.75 mL of water was added, each extraction was vortexed by hand for 1 minute, and centrifuged for 10 minutes at 3,270g at 4ºC. A biphasic solution with a pellet formed: the top, green MTBE layer and the bottom, clear MeOH:H2O layer were separated into separate tubes and dried under N2,gas overnight. The pellet was stored at -80 ºC. After drying, the MTBE layer was resuspended in 100 uL 1:1 toluene:MeOH, transferred to a LC-MS vial insert, and stored at -80C for <1 month prior to MS analysis. The MeOH:H2O layer was resuspended in 1 mL of 1:1 H2O:MeOH, transferred to a 1.7 mL centrifuge tube and spun at 15,000g for 2 minutes at 4 ºC. The supernatant was split into two 465 µL aliquots—one for GCMS and one for LC(HILIC)MS—in glass vials and dried under N2,gas. The protocol outlined above is suitable for filter-quenched cyanobacteria samples and centrifuged cell pellets. The polar methanol/water fraction resulting from the biphasic extraction was processed for analysis by hydrophilic interaction liquid chromatography (HILIC) LC-MS. Dried samples were resuspended in 100 µL 1:1 H2O:MeOH and 10 µL were aliquoted into a pooled QC sample. Samples were stored at -80 ºC until analysis. The pooled QC sample was mixed and aliquoted into twelve vials. A QC injection was run every tenth injection. The dried polar fraction for analysis by GC-MS was stored at -80 ºC until derivatization, immediately prior to MS analysis. Samples were derivatized in 30 uL methoxyamine HCl and 30 uL MSTFA, as specified in the following section. Ten microliters were removed from each sample to create a pooled QC sample, mixed, and aliquoted into thirteen vials. A QC sample was run after every sixth injection. The non-polar MTBE phase was processed for non-targeted LC-MS analysis. Twenty microliters from each sample were pooled, mixed, and aliquoted into thirteen pooled QC samples. QC injections were placed after every sixth injection.

Combined analysis:

Analysis ID	AN001991
Analysis type	MS
Chromatography type	GC
Chromatography system	Thermo ISQ
Column	Trace 1310 GC
MS Type	EI
MS instrument type	GC-TOF
MS instrument name	Thermo ISQ
Ion Mode	POSITIVE
Units	spectral abundance per cell

Chromatography:

Chromatography ID:	CH001439
Chromatography Summary:	For non-targeted GC-MS experiments, metabolites were detected using a Trace 1310 GC coupled to a Thermo ISQ mass spectrometer. Samples (1 µL) were injected at a 10:1 split ratio to a 30 m TG-5MS column (Thermo Scientific, 0.25 mm i.d., 0.25 μm film thickness) with a 1.2 mL/min helium gas flow rate. GC inlet was held at 285°C. The oven program started at 140°C for 1 min, followed by a ramp of 15°C/min to 330°C, and 5 min hold. Masses between 50-650 m/z were scanned at 5 scans/sec under electron impact ionization. Transfer line and ion source were held at 300 and 260°C, respectively. Pooled QC samples were injected after every 6 actual samples.
Instrument Name:	Thermo ISQ
Column Name:	Trace 1310 GC
Chromatography Type:	GC

MS:

MS ID:	MS001844
Analysis ID:	AN001991
Instrument Name:	Thermo ISQ
Instrument Type:	GC-TOF
MS Type:	EI
MS Comments:	Raw data was converted to *.CSV with Waters® Databridge. For idMS/MS (RP-LC-MS runs), a file was converted for low-collision, high-collision, and LockSpray for each sample. Peaks were detected within the XCMS workflow using the Centwave algorithm (Smith et al. 2006).
Ion Mode:	POSITIVE