Comment[ArrayExpressAccession] E-MEXP-3550
Investigation Title Borriss_FZB42_Root Exudates_OD1.0
Comment[Submitted Name] Borriss_FZB42_Root Exudates_OD1.0
Comment[AEExperimentDisplayName] Borriss_FZB42_Root Exudates_OD1.0
Comment[MIAMExpressLogin] Ben_Fan
Comment[MIAMExpressSubmissionID] 8109
Experiment Description Transcriptional profiling by array of Bacillus amyloliquefaciens strain FZB42 after root exudate treatment (0.25 g/L) at OD600=1.0
Experimental Design reference_design co-expression_design compound_treatment_design
Comment[AEExperimentType] transcription profiling by array
Experimental Factor Name Dose Compound
Experimental Factor Type dose compound
Person Last Name FAN
Person First Name BEN
Person Email fanben2000@gmail.com
Person Phone 0049 30 2093 8129
Person Affiliation Humboldt University
Person Address Biology Department, Chausseestr. 117, Berlin, Berlin, 10115, Germany
Person Roles submitter
Person Roles Term Source REF MGED Ontology
Quality Control Type biological_replicate
Public Release Date 2012-04-15
Comment[ArrayExpressSubmissionDate] 2012-02-10 08:24:25
Publication Title Transcriptomic profiling of Bacillus amyloliquefaciens FZB42 in response to maize root exudates
Publication Status submitted
Protocol Name P-MTAB-25364 P-MTAB-23769 P-MTAB-23770 P-MTAB-23771 P-MTAB-23772 P-MTAB-23775 P-MTAB-23774
Protocol Description Significance Test (False Discovery Rate,FDR) Protocol for the synthesis of fluorescently labeled targets by aminoallyl coupling
(using CyScribe GFX columns for purification of aa-dUTP-labeled cDNA)
This protocol describes the contents and use of the "Bielefeld Fluorescent Labeling Kit". This kit
allows the synthesis of fluorescently labeled targets from total RNA. In a first step, aminoallyl modified
first strand cDNA can be synthesized by reverse transcription of total RNA using a mixture of
oligodT15VN and random hexamer primers.
Contents of the "Bielefeld Fluorescent Labeling Kit":
The kit contains the following reagents and solutions.
Components stored at -20�C
� 5�Reaction Buffer (Bioline, delivered with BioSript Reverse Transcriptase)
� 25�dNTP stock solution (see below)
� BioScript Reverse Transcriptase (200 U/?l; Bioline)
� RNAse inhibitor (40 U/?l; Invitrogen)
� 0.2 M NaOH and 0.2 M HCl (Merck)
� 4 M hydroxylamine (Sigma, dissolve in MilliQ water)
� 1 M sodium bicarbonate pH9 (Sigma, dissolve in MilliQ water and adjust pH, pH is important)
25�dNTP stock solution:
Prepare a 25�dNTP (4:1 aa-dUTP/dTTP mix) stock as follows, store at �20�C in aliquots.
� 100 mM dATP (e.g. from Peqlab): 31.25 ?l (final concentration 12.5 mM)
� 100 mM dCTP (e.g. from Peqlab): 31.25 ?l (final concentration 12.5 mM)
� 100 mM dGTP (e.g. from Peqlab): 31.25 ?l (final concentration 12.5 mM)
� 100 mM dTTP (e.g. from Peqlab): 6.25 ?l (final concentration 2.5 mM)
� 50 mM aa-dUTP (Fermentas, Life Sciences): 50.0 ?l (final concentration 10.0 mM)
� H2O 100.0 ?l
Components stored at 4�C (-20�C after aliquoting in 1/10 volumes)
� Cy3-NHS ester or Alexa555/Alexa532/Alexa546-NHS ester
� Cy5-NHS ester or Alexa647-NHS ester
� in each case, 1/6th of one aliquot of the monoreactive dye from Amersham is used for one
labeling, mg values are not stated by the supplier (estimated between 10 and 50 ?g).
� preparing aliquots: dissolve NHS esters in 10 ?l of water-free DMSO, it is essential to avoid any
contact of the dyes with water prior to labeling. Immediately re-seal DMSO with fresh dessication
packs, aliquot 1.5 ?l of NHS esters into 10 brown Eppendorf tubes, speed-vac in the dark for 45
min, seal dried NHS esters in plastic bags together with dessication packs, store at -20�C
Components stored at RT
� CyScribe GFX columns as well as capture, washing and elution buffer (Amersham Biosciences)
You need to supply
� your favoured total RNA prepared by the methods mentioned above
� unmodified or amino-modified random hexamer primers (dissolved in DEPC-water)
� RNAse-free Eppendorf tubes and tips (e.g. from Peqlab)
� autoclaved MilliQ water
� DEPC-treated water (e.g. from the Qiagen RNeasy kit)
� 80% ethanol (diluted to 80% from absolute ethanol, Merck)
Protocol for labeling reverse-transcribed total RNA for microarray hybridizations
� time required: 4-5 hours including checking target labeling on agarose gels
� preheat the 42�C and 70�C heating blocks 30 min before starting and prepare an ice bucket
� wear gloves. Use filter tips, autoclavable pipetmen and RNAse-free Eppendorf tubes
� thaw DEPC H20, 5xReaction Buffer and primers
Reverse transcription of total RNA to yield aminoallyl-labeled first-strand cDNA
� mix by flicking and spin down:
� 10 to 30 ?g of total RNA purified using Microcon-30 filters up to 18.8 ?l
� random hexamers [5 ?g/?l] 2.0 ?l
� OR amino-modified random hexamers [5 ?g/?l] 2.0 ?l
� add DEPC-treated H2O to 20.8 ?l (duplication of volume is possible until the clean-up step!)
� incubate at 70 �C for 10 min in a heating block
� incubate at 0 �C for 5 min on ice (primer annealing), quickly spin down
During the 0�C incubation, prepare a master mix as follows (volumes are for a 1.0� mix; prepare 1.1 �
volumes per target) in an RNAse-free Eppendorf tube.
� 5�Reaction Buffer 6.0 ?l
� RNase inhibitor [40 U/?l] 0.5 ?l
� BioScript RT [200 U/?l] 1.5 ?l
� 25�dNTP stock solution including aa-dUTP 1.2 ?l
(4:1 aa-dUTP/dTTP nucleotide mix)
� mix by flicking, spin down, leave at RT until use. RNAse Inhibitor, BioScript and 25�dNTP should
be added immediately before use (do NOT store this mix on ice)
� at RT, add 9.2 ?l of the master mix to each annealing reaction, mix by flicking, spin down
� incubate at 42 �C for 90 min in a heating block
� place 0.2 N NaOH, 0.2 N HCl, 1 M sodium bicarbonate and 4 M hydroxylamine at RT
from now on, RNAse-free conditions are not required
� either (for CyScribe GFX purification): wearing gloves, place CyScribe GFX columns (one per
labeling) in collection tubes and prepare one empty 1.5 ml tube per labeling. Label collection
tubes at their side. Do not label the column and make sure during the whole procedure that
columns are not mixed up. Label the 1.5 ml tubes at the side and cut off the lid.
� thaw and vortex 1 M sodium bicarbonate, pH 9.0 to dissolve white precipitates
� prepare 0.1 M sodium bicarbonate (pH 9.0) by diluting the 1 M stock solution in MilliQ water,
vortex 1 M sodium bicarbonate (pH 9.0) to dissolve white precipitates, 60 ?l 0.1 M sodium
bicarbonate (pH 9.0) will be required per labeling reaction. Prepare 80% ethanol from absolute
ethanol using MilliQ water (1.8 ml per labeling).
Hydrolysis of RNA
� add 15 ?l of commercial (DO NOT prepare yourself) 0.2 M NaOH (arrested pipetman!) using
100 ?l filter tips (exact flowout)
� mix by flicking and spin down
� incubate at 70 �C for 10 min in a heating block
� add 15 ?l of commercial (DO NOT prepare yourself) 0.2 M HCl using the arrested pipetman and
100 ?l filter tips (exact flowout), mix immediately by pipetting up and down to avoid precipitates
� either (for CyScribe GFX purification): immediately after each target is neutralized (do not
neutralize all parallel targets first), quickly proceed with CyScribe GFX column purification
In these and the next steps, do NOT use Tris-containing buffers instead of water, since the amino
groups will interfere with the subsequent coupling
Clean-up of aminoallyl-labeled first-strand cDNA
� perform clean-up of aminoallyl-labeled first-strand cDNA using either the following Cyscribe GFX
(recommended) or the Microcon-30 protocol (more time-consuming)
Clean-up of aminoallyl-labeled first-strand cDNA (removal of nucleotides and other low-molecularweight
molecules with amino groups) using CyScribe GFX columns
� directly after neutralization of one labeling reaction add 450 ?l capture buffer to the reaction and
mix by pipetting up and down (proceed with this step until all labeling reactions have been
neutralized and mixed with capture buffer), samples should not stay in capture buffer longer than
5 min
� add the complete neutralized mix to a CyScribe GFX column
� spin at 13.000 rpm for 30 sec at 20�C in a microcentrifuge and discard flowthrough
� add 600 ?l of 80% ethanol (it is very important not to use less concentrated ethanol, do not use
the washing buffer provided with the CyScribe GFX purification kit)
� spin at 13.000 rpm for 30 sec at 20�C in a microcentrifuge and discard flowthrough
� repeat this washing step twice
� spin at 13.000 rpm for 10 sec at 20�C in a microcentrifuge and place column in a new 1.5 ml tube
� add 60 ?l 0.1 M sodium bicarbonate (pH 9.0), do not use the elution buffer provided with the
CyScribe GFX purification kit
� incubate for 5 min at room temperature
� spin at 13.000 rpm for 1 min at 20�C in a microcentrifuge
� storage of first strand cDNA eluted from the column in 0.1 M sodium bicarbonate at -20�C is not
recommended by the manufacturers of aminoallyl fluorescent labeling kits, manufacturers
recommend to proceed immediately with the coupling of fluorescent dyes (below), we have not
observed a negative effect of storage of first strand cDNA in 0.1 M sodium bicarbonate at -20�C
overnight
Coupling of fluorescent dyes to the aminoallyl-labeled first-strand cDNA
� protect samples from light all the time using brown Eppendorf tubes, avoid room light and
direct sunlight
� dissolve Cy3- or Cy5-NHS or Alexa-NHS esters provided in aliquoted form (see above) in brown
Eppendorf tubes in the complete aa-containing first strand cDNA by pipetting up and down
several times until the dye is dissolved (red/blue colour!)
alternatively, 1.5 ?l of fluorescent dye in DMSO (orgininal dye pack aliquot from Amersham
dissolved in 10 ?l DMSO, cannot be stored, always prepare fresh!) can be added to the aacontaining
first strand cDNA solution
� from now on, work in brown Eppendorf tubes to protect the fluorescent dyes
� do NOT spin down, just tap down drops from the side of the Eppendorf tubes
� incubate for 1 h at RT in the dark (up to 2 h is possible)
Quenching (blocking of all remaining dyes with the amino groups from the hydroxylamine)
� add 4.5 ?l of 4 M hydroxylamine
� mix by flicking, do NOT spin down
� leave for 15 min at RT in the dark
Clean-up of fluorescently labeled targets using CyScribe GFX Purification Kit (Amersham Biosciences)
Cy5- and Cy3-labeled targets to be hybridized simultanuously to one microarray are cleaned up
together. In the event that only one of either dye is used for hybridization or has to be purified for other
purposes, use the same volumes as specified below.
� work quickly to protect labeled targets from the light, Cy5 bleaches quickly and is
particularly sensitive to high ozone concentrations!
� add 600 ?l capture buffer (CyScribe GFX Purification Kit, Amersham Biosciences) to the Cy5-
labeled sample and mix by pipetting up and down, then add the Cy3-labeled sample to this
solution and mix by pipetting up and down
� apply all to a GFX column in a collection tube (CyScribe GFX Purification Kit), do not leave the
sample in capture buffer for more than 5 min
� spin at full speed (appr. 10.000-13.000 rpm) for 30 sec
� discard flowthrough
� add 600 ?l washing buffer (CyScribe GFX Purification Kit)
� spin at full speed (appr. 10.000-13.000 rpm) for 30 sec
� discard flowthrough
� add 600 ?l washing buffer (CyScribe GFX Purification Kit)
� spin at full speed (appr. 10.000-13.000 rpm) for 30 sec
� discard flowthrough
� add 600 ?l washing buffer (CyScribe GFX Purification Kit)
� spin at full speed (appr. 10.000-13.000 rpm) for 30 sec
� discard flowthrough
� spin at full speed (appr. 10.000-13.000 rpm) for 10 sec
� transfer the dried GFX column to a fresh brown Eppendorf tube labeled at the side, since the
cover lid has to be cut off
� add 60 ?l elution buffer (CyScribe GFX Purification Kit) to the center of the filter
� leave for 5 min at RT
� spin at full speed (appr. 10.000-13.000 rpm) for 1 min
� the resulting 60 ?l of combined Cy3/Cy5-labeled targets are transferred to a fresh brown tube with
a screw cap. Label on the sides and seal with "Tesafilm".
� remove 2 ?l into a normal Eppendorf tube for target checking on agarose gels
� freeze this aliquot as well as the 58 ?l Cy-labeled target at -20 �C until use
(Parameters: Amount of nucleic acid labeled = 10, Mass unit = Micro gram, Amplification = none)
(Parameters: Amplification = none, Mass unit = Micro gram) Hybridization of 70mer oligonucleotide microarrays using the HS4800 hybridization station
(Tecan) in conjunction with manual washing
� start the HS4800 Control Manager Software
� if a dialog box for setting up a new HS Control Manger license appears click on �Cancel�
� a login window appears
� enter login and password
� switch on the hybridization machine
� insert tubings into the washing solutions
� insert slide adapters with dummy slides into the hybridization modules to be used (always
insert 4 dummy slides per module)
� check if screws closing the injection ports are really tightend
� click on to connect the instrument to the computer
� click on to switch on the heating of the Liquid Distribution Unit
� open an appropriate hybridization program
� never change programs yourself, ask personnel of the Transcriptomics Facility for help
� select the hybridization chambers to be used by clicking on
� click on P to prime the channels to be used
� select the channels to be used and prime each for 30 sec (channels can only be primed
separately)
� insert slide adapters with microarrays into the hybridization modules (always insert 4 slides
per module, if you have less microarrays use additional dummy slides)
� click on go to start the program
� wait until a notification window �Preparing probe injection� appears (an acustic signal
reminds you of injecting the samples)
� press OK on the control panel of the instrument
� open the injection port of the first hybridization chamber to be used
� inject the first sample (100 ?l) using a pipetman (do NOT use filter tips)
� close the injection port
� press OK on the control panel of the instrument
� open the injection port of the second hybridization chamber to be used
� inject the second sample, press OK on the control panel of the instrument
� close the injection port
� proceed with the remaining samples following the same procedure until all samples have
been injected
� after the last confirmation of injection by pressing OK the program continues automatically
with the hybridization step
� prepare 250 ml or 500 ml, respectively (250 ml are needed for each individual washing step
listed below), of the washing buffers in demineralized water from appropriate stocks
(20�SSC, 10 %(w/v) SDS), preheat 2�SSC, 0.2 %(w/v) SDS washing buffer to 42�C and
cool the 0.05�SSC washing buffer to 18 �C
� prepare 2 black plastic boxes and one black plastic slide rack. Also prepare an 12x8 cm petri
dish (Genomics Solutions) containing 1 Kim-wipe and stacks of three used slides each at the
sides
� just before the program terminates, pour 250 ml 2�SSC, 0.2 %(w/v) SDS washing buffer
prewarmed to 42�C in 1 black plastic box
� wearing gloves, remove the slide adapters one by one from the hybridization modules (do
not touch the DNA side of the slide, only touch the edges of the slide!), quickly remove the
slides one by one from the adapter and place them into the black plastic slide rack that is
immersed in the first container in the prewarmed 2�SSC, 0.2 %(w/v) SDS washing buffer
� move up and down several times immediately and shake for 1 min on a horizontal shaker
after removal of the last slide. From now on regularly move slide racks up and down to avoid
air bubble formation
� proceed with the following washing steps:
- transfer to 0.2�SSC, 0.1 %(w/v) SDS (RT, at most 24�C) in a black plastic rack, shake for
1 min
- transfer to 0.2�SSC, 0.1 %(w/v) SDS (RT, at most 24�C) in a black plastic rack, shake for
1 min
- transfer to 0.2�SSC (RT, at most 24�C) in a black plastic rack, shake for 1 min
- transfer to 0.2�SSC (RT, at most 24�C) in a black plastic rack, shake for 1 min
- transfer to 0.05�SSC (Important: set to 18 �C and remove from the cooler
immediately before use) in a black plastic rack, shake for 1 min
� place rack on an 12x8 cm plastic microplate cover (Genomics Solutions) containing 2 Kimwipes
and immediately centrifuge in the microplate centrifuge at 1.200 rpm for 3-5 min. Use
a stack of 3 used glass slides at every side of the plastic dish to lift up the rack with the
slides, this avoids precipitation artetacts at the side of the slide. Be sure to counter-balance
using an appropriate balance. If necessary, dry corners of the slide afterwards with a Kimwipe
� place dried slides in a box in the dark until scanning. This may avoid bleaching effects in the
Cy5 channel. Work quickly at all times, avoid direct light and exposure to high ozone
concentrations, since this strongly enhances Cy5-bleaching.
� insert slide adapters with dummy slides in all modules that were used (always insert 4 slides
per module, even if less than 4 slides have been used for hybridization)
� click on to switch off the heating of the Liquid Distribution Unit
� insert tubings of all channels that have been used into a 2 l bucket filled with filtered and
autoclaved MilliQ wate
� click on R to rinse the channels that have been used
� only single selected channels can be rinsed at once or all 6 channels of the instrument can
be rinsed in parallel
� remove all tubings from the solutions
� open the nitrogen gas supply
� open the program �Final drying� and select all slides of each module that has been used for
hybridization
� start the program
� after the drying program has finished remove the adapters from all modules that have been
used
� clean the chambers and injection ports with demineralized water and dry the chambers using
Kim wipes
� close the nitrogen gas supply
� disconnect the instrument by clicking on
� close the HS4800 Control Manger Software
� switch off the HS4800 hybridization station
(Parameters: Chamber type = OTHER: HS4800 chamber, Quantity of label target used = 100, Mass unit = Nano gram, time = 90, Tiny time unit = minutes, Volume = 100, Volume unit = Nano litre, temperature = 42)
(Parameters: Chamber type = OTHER: HS4800 chamber, Quantity of label target used = 100, Mass unit = Nano gram, time = 90, Tiny time unit = minutes, Volume = 100, Volume unit = Nano litre, temperature = 42) When the optical density (600nm) of the FZB42 culture reached around 3.0, the culture was mixed with 0.5V killing buffer and immdiately centrifuged at 4000 rpm for 5 min at room temperature. The pellets were washed with 2 ml killing buffer and then centrifuged again. The pellets were quickly frozen by liquid nitrogen and then stored at -80�C till use. The harvested cells were washed twice with killing buffer and then resuspended into TE buffer containing lysozyme. Subsequently, buffer RA1 was used to lyse the cells. The lysate was filtrated before adjusting the conditions for bind RNA onto the silica membrane of NucleoSpin� RNA L column (Macherey & Nagel). DNA was removed by treatment with DNase. After being washed, the purified RNA was eluted from the column.The detailed information refer to the manufacturer's guideline.
(Parameters: Extracted product = total_RNA, Amplification = none) In the experiment of �Wt responses to root exudates at
OD3.0_comprehensive analysis�:
For the control, the rhizobacterium Bacillus amyloliquefaciens FZB42 was
grown in 1C medium plus 0.1% glucose and 10% soil extract shaking at 210
rpm at 24�C.
For the treatment, the maize root exudates were added into the media
used in the control and the FZB42 cells were grown likewise.
In the experiment of �2-3-4 soil extract on FZB42�
For the control, the rhizobacterium Bacillus amyloliquefaciens FZB42 was
grown in 1C medium plus 0.1% glucose shaking at 210 rpm at 24�C
For the treatment, the soil extract was added into the media used in the
control and the FZB42 cells were grown likewise.
In the experiment of �2-3-4 IE vs CE direct comparison�
For the control, the rhizobacterium Bacillus amyloliquefaciens FZB42 was
grown in 1C medium plus 0.1% glucose, 10% soil extract and the
conventional root exudates (CE) of 0.25 mg/ml, shaking at 210 rpm at
24�C.
For the treatment, the rhizobacterium Bacillus amyloliquefaciens FZB42
was grown in 1C medium plus 0.1% glucose , 10% soil extract and the
interaction root exudates (IE) of 0.25 mg/ml, shaking at 210 rpm at 24�C.
(Parameters: start time = 24, time unit = hours, min temperature = 24, temperature unit = C, media = 1C medium)
(Parameters: time unit = seconds, min temperature = 24, temperature unit = C) Slides were scanned upside down on the Tecan Reloaded Scanner using the confocal mode.
(Parameters: Scanning hardware = OTHER: Tecam Reloaded, Scanning software = AIDA [Raytest GmbH])
(Parameters: Scanning hardware = OTHER: Tecam Reloaded, Scanning software = AIDA [Raytest GmbH])
Protocol Type bioassay_data_transformation labeling hybridization specified_biomaterial_action nucleic_acid_extraction grow image_acquisition
Protocol Term Source REF MGED Ontology MGED Ontology MGED Ontology MGED Ontology MGED Ontology MGED Ontology MGED Ontology
Term Source Name MGED Ontology
Term Source File http://mged.sourceforge.net/ontologies/MGEDontology.php
SDRF File E-MEXP-3550.sdrf.txt