Name: chromatin immunoprecipitation (chip) protocol for low-abundance embryonic samples
Uploaded: 2017-08-29T14:00:00
Description: Watch this Scientific Journal Video about Chromatin Immunoprecipitation ChIP Protocol for Low-abundance Embryonic Samples at JoVE.com

Forfatterne takker Jan Appel for hans utmerket kundestøtte under etableringen av denne protokollen. Arbeid i Rada-Iglesias laboratoriet støttes av CMMC intramural finansiering, DFG forskningsmidler (RA 2547/1-1, RA 2547/2-1 og TE 1007/3-1), UoC avanserte forskeren gruppe Grant og CECAD tilskudd.

Ifølge tyske dyr omsorg retningslinjer, ingen dyr institusjon og bruk Committee (IACUC) godkjenning var nødvendig å utføre kylling embryoet eksperimenter. I henhold til lokale retningslinjer må bare eksperimenter med kylling HH44 (18-dag) embryoer og eldre IACUC godkjennes. Men embryoene brukt i denne studien var i tidligere stadier av embryonale utvikling (dvs. HH19 (72 h)).
 Merk: hensikten med denne protokollen er å gi en detaljert beskrivelse av ChIP analysen slik at den ef...

<ol>
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Epigenomic profilering av histone modifisering benytter ChIP-seq kan brukes til å forbedre funksjonelle merknaden av virveldyr genomer i ulike mobilnettet sammenhenger4,5,18. Disse epigenomic profiler kan brukes, blant annet for å identifisere enhancer elementer, definere regulatoriske delstaten enhancers (dvs. aktiv, primet og klar), og å definere store celle identitet regulatorer i forskjellige biologiske eller pat...

Histone post-translational modifikasjoner er direkte involvert i ulike chromatin avhengig av prosesser, inkludert transkripsjon, replikering og DNA reparasjon1,2,3. Videre ulike histone modifikasjoner Vis positiv (f.eks H3K4me3 og H3K27ac) eller negative (f.eks H3K9me3 og H3K27me3) korrelasjoner med genuttrykk og kan bredt defineres som aktivering eller undertrykkende histone merker, henholdsvis2,3. Følgelig globale histone endring kart, også referert til som epigenomic kart, har dukket opp som kraftige og universell verktøy funksjonelt kommentere virveldyr genomer4,5. For eksempel distale regulatoriske sekvenser som enhancers kan bli identifisert basert på tilstedeværelsen av bestemte chromatin signaturer (f.eks aktive enhancers: H3K4me1 og H3K27ac), som skilles fra proksimale promoter regioner (f.eks aktive arrangører: H3K4me3)6,7,8. På den annen side, finnes gener med store celle identitet regulatoriske funksjoner vanligvis med bred chromatin domener merket med H3K4me3 eller H3K27me3, avhengig av transcriptionally aktiv eller inaktiv status for underliggende genene, henholdsvis9 ,10. Tilsvarende synes uttrykket av store celle identitet gener å styres ofte av flere og romlig gruppert enhancers (dvs. super enhancers), som kan identifiseres som bred H3K27ac-merket domener11.
Foreløpig genereres histone endringen kartene ved hjelp av ChIP-seq-teknologi, som i forhold til forrige metoder som ChIP-chip (ChIP koblet til microarrays) gir høyere oppløsning, færre gjenstander, mindre støy, større dekning og lavere koster12. Likevel, generering av epigenomic kart ved hjelp av ChIP-seq teknologi har iboende begrensninger mostly assosiert med kapasitet til å utføre ChIP i utvalgene av interesse. Tradisjonelle ChIP protokoller vanligvis kreves millioner av celler, som limit anvendelse av denne metoden til i vitro cellen linjer eller celler som kan lett bli isolert i vivo (f.eks blodceller). I de siste årene, har en rekke endret ChIP protokoller kompatibel med lav cellen tallene vært beskrevet13,14,15,16. Men disse protokollene er utviklet for å være sammen med neste generasjons sekvensering (dvs. ChIP-seq), og de bruker adhoc biblioteket forberedelse metoder13,14, 15 , 16.
Her vi beskrev en ChIP-protokoll som kan brukes til å undersøke histone endring profiler med lav til middels celle tall (5 x 104 - 5 x 105 celler) på enten valgte loci (dvs. ChIP-qPCR) eller globalt (dvs. ChIP-seq) (figur 1). Kombinert ChIP-seq teknologi, kan våre ChIP-protokollen brukes sammen med standard bibliotek forberedelse metoder, således gjør den bredt tilgjengelig for mange laboratorier10. Denne protokollen er brukt til å undersøke flere histone merker (f.eks H3K4me3, H3K27me3 og H3K27ac) i annen kylling embryonale vev (f.eks spinal medfødte (SNT), frontonasal prominences og epiblast). Men forventer vi at det skal være bredt aktuelt for andre organismer der biologisk og/eller klinisk relevante eksempler bare finnes i små mengder.

<table>
	<tbody>
		<tr>
			<td>Reagent</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>BSA powder</td>
			<td>Carl Roth</td>
			<td>3737.3</td>
			<td></td>
		</tr>
		<tr>
			<td>Phosphate Saline buffer (PBS)</td>
			<td>Sigma Aldrich</td>
			<td>D8537</td>
			<td></td>
		</tr>
		<tr>
			<td>Tris-HCL pH8.0</td>
			<td>Sigma Aldrich</td>
			<td>T1503</td>
			<td></td>
		</tr>
		<tr>
			<td>NaCl</td>
			<td>Carl Roth</td>
			<td>3957.2</td>
			<td></td>
		</tr>
		<tr>
			<td>EDTA</td>
			<td>Carl Roth</td>
			<td>8043.2</td>
			<td></td>
		</tr>
		<tr>
			<td>EGTA</td>
			<td>Carl Roth</td>
			<td>3054.2</td>
			<td></td>
		</tr>
		<tr>
			<td>Na-Deoxycholate</td>
			<td>Sigma Aldrich</td>
			<td>D6750-24</td>
			<td></td>
		</tr>
		<tr>
			<td>N-lauroylsarcosine</td>
			<td>Sigma Aldrich</td>
			<td>61743-25G</td>
			<td></td>
		</tr>
		<tr>
			<td>Hepes</td>
			<td>Applichem</td>
			<td>A3724,0250</td>
			<td></td>
		</tr>
		<tr>
			<td>LiCl</td>
			<td>Carl Roth</td>
			<td>3739.2</td>
			<td></td>
		</tr>
		<tr>
			<td>NP-40</td>
			<td>Sigma Aldrich</td>
			<td>I3021-100ml</td>
			<td></td>
		</tr>
		<tr>
			<td>SDS</td>
			<td>Carl Roth</td>
			<td>1833</td>
			<td></td>
		</tr>
		<tr>
			<td>Protein G/magnetic beads</td>
			<td>Invitrogen</td>
			<td>1004D</td>
			<td></td>
		</tr>
		<tr>
			<td>37% Formaldehyde</td>
			<td>Sigma Aldrich</td>
			<td>252549-1L</td>
			<td></td>
		</tr>
		<tr>
			<td>Glycine</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>RNase</td>
			<td>Peqlab</td>
			<td>12-RA-03</td>
			<td></td>
		</tr>
		<tr>
			<td>Proteinase K</td>
			<td>Sigma Aldrich</td>
			<td>46.35 E</td>
			<td></td>
		</tr>
		<tr>
			<td>Na-butyrate</td>
			<td>Sigma Aldrich</td>
			<td>SLB2659V</td>
			<td></td>
		</tr>
		<tr>
			<td>Proteinase inhibitor</td>
			<td>Roche</td>
			<td>5892791001</td>
			<td></td>
		</tr>
		<tr>
			<td>SYBRgreen Mix</td>
			<td>biozym</td>
			<td>617004</td>
			<td></td>
		</tr>
		<tr>
			<td>dH2O</td>
			<td>Sigma Aldrich</td>
			<td>W4502</td>
			<td></td>
		</tr>
		<tr>
			<td>1Kb ladder</td>
			<td>Thermofisher</td>
			<td>SM1333</td>
			<td></td>
		</tr>
		<tr>
			<td>Orange G</td>
			<td>Sigma Alrich</td>
			<td>03756-25</td>
			<td></td>
		</tr>
		<tr>
			<td>Agarose</td>
			<td>Invitrogen</td>
			<td>16500-500</td>
			<td></td>
		</tr>
		<tr>
			<td>0.25% Trypsin-EDTA (1X)</td>
			<td>Gibco</td>
			<td>25200-072</td>
			<td></td>
		</tr>
		<tr>
			<td>Octylphenol Ethoxylate (Triton X 100)</td>
			<td>Roth</td>
			<td>3051.4</td>
			<td></td>
		</tr>
		<tr>
			<td>DMEM (Dulbecco&#180;s Modified Eagle Medium)</td>
			<td>Gibco</td>
			<td>31331-028</td>
			<td></td>
		</tr>
		<tr>
			<td>Gel loading tips Multiflex</td>
			<td>A.Hartenstein</td>
			<td>GS21</td>
			<td></td>
		</tr>
		<tr>
			<td>qPCR Plates</td>
			<td>Sarstedt</td>
			<td>721,985,202</td>
			<td></td>
		</tr>
		<tr>
			<td>384 well</td>
			<td>Sarstedt</td>
			<td>721,985,202</td>
			<td></td>
		</tr>
		<tr>
			<td>1.5 mL tubes</td>
			<td>Sarstedt</td>
			<td>72,706</td>
			<td></td>
		</tr>
		<tr>
			<td>100-1000&#181;l Filter tips</td>
			<td>Sarstedt</td>
			<td>70,762,211</td>
			<td></td>
		</tr>
		<tr>
			<td>2-20&#181;l Filter tips</td>
			<td>Sarstedt</td>
			<td>70,760,213</td>
			<td></td>
		</tr>
		<tr>
			<td>2-200&#181;l Filter tips</td>
			<td>Sarstedt</td>
			<td>70,760,211</td>
			<td></td>
		</tr>
		<tr>
			<td>0.5-10&#181;l Filter tips</td>
			<td>Sarstedt</td>
			<td>701,116,210</td>
			<td></td>
		</tr>
		<tr>
			<td>H3K27me3 antibody</td>
			<td>Active Motif</td>
			<td>39155</td>
			<td></td>
		</tr>
		<tr>
			<td>H3K27ac antibody</td>
			<td>Active Motif</td>
			<td>39133</td>
			<td></td>
		</tr>
		<tr>
			<td>H3K4me3 antibody</td>
			<td>Active Motif</td>
			<td>39159</td>
			<td></td>
		</tr>
		<tr>
			<td>H3K4me2 antibody</td>
			<td>Active Motif</td>
			<td>39141</td>
			<td></td>
		</tr>
		<tr>
			<td>End Repair Mix</td>
			<td>Illumina</td>
			<td>FC-121-4001</td>
			<td></td>
		</tr>
		<tr>
			<td>Paramagnetic beads</td>
			<td>Beckman Coulter</td>
			<td>A63881</td>
			<td></td>
		</tr>
		<tr>
			<td>Resuspension buffer</td>
			<td>Illumina</td>
			<td>FC-121-4001</td>
			<td></td>
		</tr>
		<tr>
			<td>A-Tailing Mix</td>
			<td>Illumina</td>
			<td>FC-121-4001</td>
			<td></td>
		</tr>
		<tr>
			<td>Ligation Mix</td>
			<td>Illumina</td>
			<td>FC-121-4001</td>
			<td></td>
		</tr>
		<tr>
			<td>RNA Adapter Indexes</td>
			<td>Illumina</td>
			<td>RS-122-2101</td>
			<td></td>
		</tr>
		<tr>
			<td>Stop Ligation Buffer</td>
			<td>Illumina</td>
			<td>FC-121-4001</td>
			<td></td>
		</tr>
		<tr>
			<td>PCR Primer Cocktail</td>
			<td>Illumina</td>
			<td>FC-121-4001</td>
			<td></td>
		</tr>
		<tr>
			<td>Enhanced PCR Mix</td>
			<td>Illumina</td>
			<td>FC-121-4001</td>
			<td></td>
		</tr>
		<tr>
			<td>Genomic DNA ladder</td>
			<td>Agilent</td>
			<td>5067-5582</td>
			<td></td>
		</tr>
		<tr>
			<td>Elution Buffer</td>
			<td>Agilent</td>
			<td>19086</td>
			<td></td>
		</tr>
		<tr>
			<td>Sample Buffer</td>
			<td>Agilent</td>
			<td>5067-5582</td>
			<td></td>
		</tr>
		<tr>
			<td>Library Quantification Kit</td>
			<td>Kapa Biosystems</td>
			<td>KK4835 &#8211; 07960204001</td>
			<td></td>
		</tr>
		<tr>
			<td>Fertile chicken white eggs</td>
			<td>LSL Rhein Main</td>
			<td>KN: 15968</td>
			<td></td>
		</tr>
		<tr>
			<td>Needle (Neoject)</td>
			<td>A.Hartenstein</td>
			<td>10001</td>
			<td></td>
		</tr>
		<tr>
			<td>Syringe (Ecoject 10ml)</td>
			<td>Dispomed witt oHG</td>
			<td>21010</td>
			<td></td>
		</tr>
		<tr>
			<td>Name</td>
			<td>Company</td>
			<td>Catalog Number</td>
			<td>Comments</td>
		</tr>
		<tr>
			<td>Equipment</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Centrifuge</td>
			<td>Hermle</td>
			<td>Z 216 MK</td>
			<td></td>
		</tr>
		<tr>
			<td>Thermoshaker</td>
			<td>ITABIS</td>
			<td>MKR13</td>
			<td></td>
		</tr>
		<tr>
			<td>Sonicator</td>
			<td>Active Motive</td>
			<td>EpiShear probe sonicator</td>
			<td></td>
		</tr>
		<tr>
			<td>Sonicator</td>
			<td>Diagenode</td>
			<td>Bioruptor Plus</td>
			<td></td>
		</tr>
		<tr>
			<td>Rotator</td>
			<td>Stuart</td>
			<td>SB3</td>
			<td></td>
		</tr>
		<tr>
			<td>Variable volume (5&#8211;1,000 &#956;l) pipettes</td>
			<td>Eppendorf</td>
			<td>N/A</td>
			<td></td>
		</tr>
		<tr>
			<td>Timer</td>
			<td>Sigma</td>
			<td>N/A</td>
			<td></td>
		</tr>
		<tr>
			<td>Magnetic holder</td>
			<td>Thermo Fisher</td>
			<td>DynaMag-2 12321D</td>
			<td></td>
		</tr>
		<tr>
			<td>Table spinner</td>
			<td>Heathrow Scientific</td>
			<td>Sprout</td>
			<td></td>
		</tr>
		<tr>
			<td>Mixer</td>
			<td>LMS</td>
			<td>VTX 3000L</td>
			<td></td>
		</tr>
		<tr>
			<td>Real-Time PCR Cycler</td>
			<td>Roche</td>
			<td>Light Cycler; Serial Nr.5662</td>
			<td></td>
		</tr>
		<tr>
			<td>PCR Cycler</td>
			<td>Applied Biosystems</td>
			<td>Gene Amp PCR System 9700</td>
			<td></td>
		</tr>
		<tr>
			<td>DNA and RNA quality control system</td>
			<td>Agilent</td>
			<td>Agilent 4200 TapeStation System</td>
			<td></td>
		</tr>
		<tr>
			<td>Forceps</td>
			<td>Dumont</td>
			<td>5-Inox-H</td>
			<td></td>
		</tr>
		<tr>
			<td>Perforated spoon</td>
			<td>World precision instruments</td>
			<td>501997</td>
			<td></td>
		</tr>
	</tbody>
</table>

chromatin immunoprecipitation (chip) protocol for low-abundance embryonic samples

Chromatin immunoprecipitation (ChIP) er en mye brukt teknikk for å kartlegge lokaliseringen av post-translationally endret histones, histone varianter, transkripsjonsfaktorer eller chromatin-modifisere enzymer i et gitt locus eller på en genomet-bred skala. Kombinasjonen av ChIP analyser med neste generasjons sekvensering (dvs. ChIP-Seq) er en effektiv tilnærming til å avdekke globalt genet regulatoriske nettverk og forbedre funksjonelle merknaden av genomer, spesielt av ikke-kodingen regulatoriske sekvenser. ChIP protokoller krever vanligvis store mengder mobilnettet materiale, dermed utelukker anvendelsen av denne metoden å undersøke sjeldne celletyper eller liten vev biopsier. For å gjøre ChIP analysen kompatibel med mengden biologisk materiale som vanligvis finnes i vivo under tidlig virveldyr embryogenesis, beskriver vi her en forenklet ChIP protokoll der antall trinn som kreves for å fullføre den analysen ble redusert for å unngå tap av prøven. Denne brikken protokollen har blitt brukt til å undersøke ulike histone endringer i ulike embryonale kylling og voksen mus vev med lav til middels cellen tallene (5 x 104 - 5 x 105 celler). Viktigere, denne protokollen er kompatibel med ChIP-seq-teknologi bruker standard bibliotek forberedelse metoder, gir global epigenomic kart i svært relevante embryonale vev.

For å illustrere ytelsen til vår ChIP-protokollen, utført vi ChIP-seq eksperimenter med grupperte SNT inndelinger fra HH19 kylling embryoer, maxillary prominences av HH22 kylling embryoer og scenen-HH3 kylling embryoer undersøke bindende profiler ulike histone endringer (dvs. H3K4me2, H3K27ac, H3K4me3 og H3K27me3). Når ChIP DNAs ble innhentet, ble sonication effektiviteten evaluert av agarose gel geleelektroforese av de tilsvarende input DNAs (Figur 3</s...

Watch this Scientific Journal Video about Chromatin Immunoprecipitation ChIP Protocol for Low-abundance Embryonic Samples at JoVE.com

Chromatin Immunoprecipitation ChIP Protocol for Low-abundance Embryonic Samples

Her beskriver vi en chromatin immunoprecipitation (ChIP) og ChIP-seq biblioteket forberedelse protokollen å generere globale epigenomic profiler fra lav-overflod kylling embryonale prøver.

Chromatin Immunoprecipitation (ChIP) protokollen for lav-overflod embryonale prøver

Chromatin immunoprecipitation (ChIP) is a widely-used technique for mapping the localization of post-translationally modified histones, histone variants, ...

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Genetics

Chromatin Immunoprecipitation (ChIP) Protocol for Low-abundance Embryonic Samples

Sequential Salt Extractions for the Analysis of Bulk Chromatin Binding Properties of Chromatin Modifying Complexes

Sekvensiell Salt utdrag for analyse av Bulk Chromatin bindende egenskaper Chromatin endre komplekser

Elucidation of the binding properties of chromatin-targeting proteins can be very challenging due to the complex nature of chromatin and the heterogeneous ...

Analysis of the c-KIT Ligand Promoter Using Chromatin Immunoprecipitation

Analyse av c-KIT ligand-promotoren ved bruk av kromatinimmunutfelling

Multiple cellular processes, including DNA replication and repair, DNA recombination, and gene expression, require interactions between proteins and DNA. ...

Chromatin Immunoprecipitation (ChIP) in Mouse T-cell Lines

Chromatin Immunoprecipitation ChIP in Mouse T-cell Lines

Kromatinimmunpresipitasjon (ChIP) i mus-T-cellelinjer

Signaling pathways regulate gene expression programs via the modulation of the chromatin structure at different levels, such as by post-translational ...

Generation of Native Chromatin Immunoprecipitation Sequencing Libraries for Nucleosome Density Analysis

Generasjon av innfødte Chromatin Immunoprecipitation sekvensering biblioteker til Nucleosome tetthet analyse

We present a modified native chromatin immunoprecipitation sequencing (ChIP-seq) experimental protocol compatible with a Gaussian mixture distribution ...

Chromatin Immunoprecipitation (ChIP) of Histone Modifications from Saccharomyces cerevisiae

Chromatin Immunoprecipitation ChIP of Histone Modifications from Saccharomyces cerevisiae

Chromatin Immunoprecipitation (ChIP) Histone endringer fra Saccharomyces cerevisiae

Histone post-translational modifications (PTMs), such as acetylation, methylation and phosphorylation, are dynamically regulated by a series of enzymes ...

CRISPR-Mediated Reorganization of Chromatin Loop Structure

CRISPR-mediert reorganisering av Chromatin Loop struktur

Recent studies have clearly shown that long-range, three-dimensional chromatin looping interactions play a significant role in the regulation of gene ...

Chromatin Immunoprecipitation of Murine Brown Adipose Tissue

Chromatin Immunoprecipitation av Murine brun fettvev

Most cellular processes are regulated by transcriptional modulation of specific gene programs. Such modulation is achieved through the combined actions of ...

Chromatin Immunoprecipitation Assay Using Micrococcal Nucleases in Mammalian Cells

Kromatin Immunutfelling analysen bruke Micrococcal Nukleaser i pattedyrceller

To express cellular phenotypes in organisms, living cells execute gene expression accordingly, and transcriptional programs play a central role in gene ...

Discovering CsgD Regulatory Targets in Salmonella Biofilm Using Chromatin Immunoprecipitation and High-Throughput Sequencing (ChIP-seq)

Discovering CsgD Regulatory Targets in Salmonella Biofilm Using Chromatin Immunoprecipitation and High-Throughput Sequencing ChIP-seq

Oppdagelse CsgD regulere mål inne Salmonella biofilm benytter kromatin Immunutfelling og høy-produksjon sekvensering (flis-SEQ)

Chromatin immunoprecipitation followed by sequencing (ChIP-seq) is a technique that can be used to discover the regulatory targets of transcription ...

High-Resolution Mapping of Protein-DNA Interactions in Mouse Stem Cell-Derived Neurons using Chromatin Immunoprecipitation-Exonuclease (ChIP-Exo)

High-Resolution Mapping of Protein-DNA Interactions in Mouse Stem Cell-Derived Neurons using Chromatin Immunoprecipitation-Exonuclease ChIP-Exo

Høyoppløselig kartlegging av protein-DNA interaksjoner i mus stamcelle-avledede nevroner ved hjelp av kromatin immunoprecipitation-exonuclease (ChIP-Exo)

Identification of specific protein-DNA interactions on the genome is important for understanding gene regulation. Chromatin immunoprecipitation coupled ...