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Europe - Diagenode s.a. / [email protected] / [email protected] // North America - Diagenode Inc. / [email protected] / [email protected]
www.diagenode.com
Standard protocols DNA shearing for Bioruptor® Pico
Standard operating conditions
Sample volume: 100µl
Tubes: 0.65mlBioruptor®Microtubes(Cat.No.WA-005-0500)
Tube holder: 0.65mltubeholderforBioruptor®Pico(Cat.No.B01200042)for12x0.65mltubes
Sonication buffer: TE(10mMTris,1mMEDTA,pH7.5-8.0)
DNA concentration:1-20ng/µl(10ng/µlrecommended)
Samplesarevortexed(5-10sec)andcentrifuged(10sec)beforeshearing.For optimal results samples should be stored on ice during 5-10 minutes prior to sonication.
Temperature: 4°C – Water Cooler (Cat. No. BioAcc-Cool) & Single Cycle Valve (Cat. No.B02020004)
Sonication cycle & total sonication time:variesdependingondesiredDNAsize(seetable)
Note: Recommended protocols are subject to change without notice. Additional protocols areavailableondemand.
125 bp
135 bp
183 bp
200 bp
234 bp
319 bp
476 bp
696 bp
848 bp
1036 bp
1230 bp
Programmable DNA size distributions, excellent reproducibility, and high dsDNA yields with Bioruptor® Pico
Figure shows different DNA sizedistributions of sheared genomicDNAproducedbyvaryingthedurationof sonication. The different curvesdepictaspecificBioruptor®PicoNext-Generationrun,optimizedtoproducespecific mean sizes and size rangesforNext-Generationsequencing.All samples were analyzed onBioanalyzer 2100 using DNA HighSensitivitychip.
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Europe - Diagenode s.a. / [email protected] / [email protected] // North America - Diagenode Inc. / [email protected] / [email protected]
www.diagenode.com
Target sizeCycle condition
(On/Off cycle time)Cycle number
150bp 30’’/30’’ 30
200bp 30’’/30’’ 13
300bp* 30’’/90’’ 6
400bp* 15’’/90’’ 7-8
1000bp* 5’’/90’’ 7-8
*Forlongerfragments(300upto1000bp),ashortcentrifugationstepafterhalfofthecyclenumberscansignificantlyimprovetheresults.Protocolsforothersizeranges(incl.longerfragmentsupto1300bp)areavailableonrequest.
Broad DNA size distribution, excellent reproducibility, and high dsDNA yields with Bioruptor® Pico
Figure A shows different DNA sizedistributions of sheared genomic DNAproduced by varying the duration ofsonicationfrom2separateexperiments(run-to-runvariation).Thedifferentlanesdepict4lanesfrom2differentBioruptor®
Picoruns,optimizedtoproducespecificmean sizes corresponding to 150, 200,300 and 400 bp (based on the standardIonTorrentstandardsamplepreparationsizerequirements).
Figure B shows different DNA sizedistributions of sheared genomic DNAproduced by varying the duration ofsonication. The different lanes depict aspecific Bioruptor® Pico run, optimizedto produce specific mean sizes andsize ranges for Next-Generation DNAsequencing.
Panel A: peak electropherogram view.Lanes 1,2: 150 bp; Lanes 3,4: 200 bp;Lanes5,6:300bp;Lanes7,8:400bp.
PanelB:gelvirtualview
AllsampleswereanalyzedonBioanalyzer2100usingDNAHighSensitivitychip.
A.
B.
The protocol settings listed above are recommended guidelines and actual results may vary depending on the type and amount of starting material, purity level, concentration and/or sample viscosity. It is highly recommended that a time course response experiment be carried out (e.g. varying the time of “on” and “off” durations as well as the number of cycles) to determine the appropriate treatment for your specific sample. Starting material with a smaller sample volume and a greater concentration than the recommended range may require a different time course to ensure homogenous shearing results.
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Europe - Diagenode s.a. / [email protected] / [email protected] // North America - Diagenode Inc. / [email protected] / [email protected]
www.diagenode.com
A.TargetSize:150bp
C.TargetSize:300bp
B.TargetSize:200bp
D.TargetSize:400bp
Excellent reproducibility and programmable size distribution with Bioruptor® Pico
PanelsAtoDshowsizedistributionsofsheared genomic DNA from separateexperimentsaimingatproducinghigh-qualityDNAfragmentscompatiblewithIonTorrentstandardsamplepreparationprotocols(150,200,300and400bp).
Panel A: 30 cycles, 30 sec ON/30 secOFFcycles.Expectedfragmentsize:150bp, observed average fragment size is150.6bp(CV%:2.07%).
Panel B: 13 cycles, 30 sec ON/30 secOFFcycles.Expectedfragmentsize:200bp, observed average fragment size is202.2bp(CV%:4.7%).
PanelC:6cycles,15secON/90secOFFcycles.Expectedfragmentsize:300bp,observedaveragefragmentsizeis291.3bp(CV%:4.31%).
PanelD:7cycles,15secON/90secOFFcycles.Expectedfragmentsize:400bp,observedaveragefragmentsizeis406.9bp(CV%:7.96%).
All samples were analyzed onBioanalyzer 2100 DNA High Sensitivitychips.
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Europe - Diagenode s.a. / [email protected] / [email protected] // North America - Diagenode Inc. / [email protected] / [email protected]
www.diagenode.com
Important comments about DNA shearing
The Diagenode ACT (Adaptative Cavitation Transfer technology) process is highly reproducible.However,attentionmustbepaidtothefollowingtreatmentattributestoensurebestresults:
• Tubes:Atpresent,therecommendedtubevesselsarethe0.65mlBioruptor®Microtubes(CatNo.WA-005-0500).Payattentionnottodamagethecapwhenclosingthetubessincethiscouldaltersonicationresults.
• Sample volume:Therecommendedvolumeofthe0.65mlBioruptor®Microtubes(CatNo.WA-005-0500)is100µl.Whenusinglowervolumes(e.g.≤50µl),lessreproducibleresultsmaybeobserved due to an alteration of the ultrasonic waves distribution in the sample fluid; thus,reducing the efficiency of sonication which may result in broader size distribution or largerpeaks.
• Sample concentration:DiagenoderecommendsusingDNAconcentrationrangingbetween1and20ng/µl(10ng/µlrecommended).Usinglargerconcentration(e.g.50-100ng/µl)mayresultinbroaderpeaksorvariablepeakdistribution.
• Sample preparation:Sampleviscositymayhaveamajorimpactonsonicationresults.CarefulresuspensionofDNAsampleisstronglyrecommendedbeforesonicationprocessing.Multiplepipettingandgentlevortexingfollowedbyashortcentrifugationtorecoversamplevolumeatthebottomofthetubeisthereforestronglyrecommended.StoringDNAsamplesoniceduring5-10minutesbeforesonicationhasalsobeenshowntoimprovereproducibility.
• DNA quality: DNA quality and quantity must be considered carefully since bad quality andquantityDNAmayhaveseveralimpactsonsonicationandNext-Gensequencingdownstreamapplications.First,DNAcontamination(e.g.fromsuperfluousnucleicacidssuchasRNA,smallnucleicacidfragments,excessproteins,orothercontaminatingmaterials)mayinterferewithDNA measurement method leading to incorrect DNA quantitation thus. Also contaminatingRNA in genomic DNA preparation might generate a biased fragment distribution profile onmicrofluidics-basedplatform(e.g.AgilentBioanalyzer)oraltersonicationeffiency.
Therefore it is highly recommended to use only high quality DNA when sonicating DNA forNext-Gensequencing librarypreparation.TheDNAsample tobeprocessedshouldbehighlypure,havinganOD260/280ratioofbetween1.8and2.0,andshouldbeas intactaspossible.DNAextractedusingstandardtechniques(e.g.ProteinaseKdigested,doublephenol/chloformextraction, ethanol precipitated, treatment with RNase-DNase free enzymatic digestion toremovecontaminantRNA)orcommercialspin-columnbasedkitsarerecommended.
• Water temperature:PropagationofultrasoundinaliquidunavoidablyproducesheatthatcanultimatelyalterDNAsample(e.g.bythermaldenaturation).Toensurethebestpreservationofthesample,itisrecommendedtostartthesonicationprocesswithcoldwaterinthewaterbath.Duringsonication,especiallywhendoinglongsonicationruns,thetemperaturemustalsobecontrolled.Thisisobtainedbytheautomatictemperaturecontrol.
Note: Thepermanent installationof theBioruptor®Pico inacold room ispossible,althoughnotsufficienttoavoidthetemperatureincreaseduetosonication.
• Automatic temperature control:Arecirculatingwatercoolerisusedtoguaranteetheautomatictemperaturecontrolofthewaterbathduringthewholesonicationprocess.Thiswatercooler(Cat.No.BioAcc-cool)producesaregularwaterflowwithaconstantwater level in thetank.
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Europe - Diagenode s.a. / [email protected] / [email protected] // North America - Diagenode Inc. / [email protected] / [email protected]
www.diagenode.com
Anadditionalregulatingvalve(SingleCycleValve,Cat.No.B02020004)ensuresthatwaterwillonlybereplacedduringtheoffcycletoavoidanyinterferencebetweenthewaterflowandthesonicationprocess.
• Sonication time:Minoradjustmentsincyclenumbermaybemadetooptimizeresultsforvarioussampletypesandconcentrations.Cyclenumberlistedaboveisarecommendedguideline.Actualresultsmayvarydependingontheamountandtypeofstartingmaterial,concentration,viscosityand/orplastictubes.Diagenoderecommendssettingupatimedoseresponseexperimentfordeterminingappropriatecyclenumber.Largerlengthstartingmaterial(e.g.totalgenomicDNA)andhigherconcentrationmayrequirealongerdosetoensureahomogeneousshearingresult.
• Water bath:ThesonicationwaterbathisacriticalcomponentoftheBioruptor®Picosonicationsystem.
1. Water purity: Contaminants such as algae and particules may alter the ultrasonic wavespropagation,resultinginbroadersizedistributionorlargerpeaks.Bathwatershouldbepuredistilled water,changedregularly(atleastonceperweek).
2. Water bath maintenance: The water bath metal surface is fragile and requires a carefulmaintenance.Useonlysoftspongetoremovetraces.Neverusescratchscrubspongesincethiswouldaltertheultrasonicwaveemittersurface.
3. Water type:Distilled water
Supplementary Data:
Pleasenotethattherearethreemainsourcesofvariationinbothpeakbase-pairsizeanddistribution:
1) ThephysicalprocessofDNA fragmentationmightnotbeentirely random inAT-orGC-richregions.
2) The analytical process to determine fragment size has inherent variances (for example, gelelectrophoresisandmicrofluidics-basedplatform).Therefore,fragmentdistributionsandpeakvalues,even fromtechnical replicates,maynotappear identical. If theshearedDNAsamplewillberesinorcolumnpurifiedorconcentratedpriortoanalysis,pleaseremembertotakeoutanaliquot foruseascontrolprior to thatstep.Columnpurificationandconcentrationof theshearedDNAwillgenerateabiasedfragmentdistributionprofileduetotheinherentgreaterlossofthesmallerDNAfragments.
3) RNA contamination in genomic DNA preparation should be carefully removed using RNase-DNasefreeenzymaticdigestionsincetheymightgenerateabiasedfragmentdistributionprofileonmicrofluidics-basedplatform(e.g.AgilentBioanalyzer)oraltersonicationeffiency.
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