RIP: miR-202 mimic-transfected HeLa cells vs. negative control
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
SUBMITTER: Alan Fu
PROVIDER: E-GEOD-42981 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:Potential miR-202 targets were identified using a targetome-wide RIP-based microarray. HeLa cells were transfected with either a miR-202 mimic or a scrambled single-stranded RNA negative control. RNA was isolated from total cell lysate prior to IP and from antibody-immobilized Protein G agarose beads-RNP complexes (post-IP).
2012-12-19 | GSE42981 | GEO
Project description:We identified protein-protein interactions and chromatin binding sites for two isforms of BRD1 (BRD1-S and BRD1-L) using Co-IP MS/MS and ChIP-seq. BRD1 isoforms were cloned, epitope-tagged (pcDNA 6 V5-His6, Lifetechnologies) and stably expressed in HEK293T cells. Chromatin immunoprecipitations were performed using anti V5-antibody conjugated agarose beads (Sigma-Aldrich) and anti HA antibody conjugated agarose beads (Sigma-Aldrich) as controls
2015-10-29 | E-GEOD-62811 | biostudies-arrayexpress
Project description:The presence of the PUF (Pumilio/FBF) domain defines a conserved family of RNA-binding proteins involved in repressing gene expression. It has been suggested that a conserved function of PUF proteins is to repress differentiation and sustain the mitotic proliferation of stem cells. In humans, Pumilio2 (PUM2) is expressed in embryonic stem cells and adult germ cells. To identify mRNAs associated with human PUM2 protein in adipose tissue stem cells (ADSC), we used a modified Ribonucleoprotein-ImmunoPrecipitation Microarray (RIP-Chip). PUM2 ribonucleoprotein (RNP) complexes were performed with 2 µg of anti-Pum2 antibody (goat polyclonal, Santa Cruz Biotechnology, CA, USA) bound to protein G-agarose beads (Sigma, Deisenhofen, Germany). ADSCs were lysed in polysome lysis buffer (Tris-HCl pH 7.4 15mM, MgCl2 15 mM, NaCl 0,3 M, 1% Triton X-100, 1 mM DTT, 100 U/ml RNase Out, PMSF 1mM and E64 10uM) for one hour at 4°C. Beads were washed, then buffer and cell lysate were added, and the reaction mixtures were tumbled for 2 hours at 4°C. After this incubation, the beads were thoroughly washed again with polysome lysis buffer and then either RNA extracted for microarray and RT-PCR experiments using the RNeasy mini kit (Qiagen). To control for non-specifically enriched RNAs, identical IPs were performed with beads precoated with preimmune goat serum as a negative control. RNA was processed for hybridization with GeneChip 3’ IVT Express (Affymetrix - Santa Clara, USA), according to the manufacturers instruction. Briefly, cDNA was synthesized from immunoprecipitated RNA using reverse transcriptase followed by second strand synthesis to generate double-stranded cDNA. An in vitro transcription reaction was used to generate biotinylated cRNA. After purification and fragmentation, cRNA was hybridized onto GeneChip Affymetrix Human Genome U133 Plus 2.0 arrays. Post hybridization washes were preformed on an Affymetrix GeneChip Fluidics Station 450. Arrays were scanned on an Affymetrix GeneChip Scanner 3000. Scanned arrays were normalized using GCRMA in Partek software (Partek Incorporated. St. Louis, MO). Differentially enriched RNAs were found after performing One-way ANOVA analysis comparing immunoprecipitated samples against control samples. Final lists of genes were obtained by filtering the data from the statistical results according to fold enrichment more than 2 and a p value associated of less than 0.05 for features with signal well above the background. Pum2 IP and control IP samples were analyzed for each of 2 biological replicates.
2011-07-31 | E-GEOD-26626 | biostudies-arrayexpress
Project description:Immunoaffinity Purifications of Human Argonaute Twelve hours after transfections with mock or with miR-124, we washed each 15-cm plate once with phosphate-buffered saline (usually two plates were used per IP), then added 1 ml of 4 C lysis buffer (150 mM KCl, 25 mM Tris-HCl [pH 7.4], 5 mM Na-EDTA [pH 8.0], 0.5% Nonidet P-40, 0.5 mM DTT, 10 ul protease inhibitor cocktail [Pierce Cat# 78437], 100 U/ml SUPERaseIn [Ambion Cat# AM2694]). Following a 30-min incubation at 4 C, we scraped the plates, combined the lysates, and then spun them at 4 C for 30 min at 14,000 RPM in a microcentrifuge. We collected the supernatant and filtered it through a 0.45-um syringe filter. We froze an aliquot of lysate in liquid nitrogen for reference RNA isolation. We then added 0.22 mg/ml heparin to the lysate. We mixed the lysate with 2.5 mg of Dynal m-280 streptavidin beads (250 ul from original storage solution) coupled to biotinylated 4F9 ago antibody (~12.5 ug), which we equilibrated immediately prior to use by washing twice with 1 ml of lysis buffer. We incubated the beads with the lysate for 2 h at 4 C and then washed the beads twice with 1.25 ml of ice-cold lysis buffer for 5-min each. Five percent of the beads were frozen for SDS PAGE analysis after the second wash. RNA was extracted directly from the remaining beads using lysis buffer from Invitrogen's Micro-to-Midi kit (Invitrogen Cat# 12183-018). We purified RNA from the lysate and RNA extracted from the beads with the Micro-to-Midi kit as per vender's instructions, except that the percentage isopropanol used for binding to the column was 70%, instead of 33%, to promote the binding of small RNAs. RNA was amplified with ambion kit 1755. RNA from total cell lysate was labeled with cy3 and IPd RNA was labeled with cy5
2009-11-10 | GSE18834 | GEO
Project description:Immunoaffinity Purifications of Human Argonaute Twelve hours after transfections with mock or with miR-124, we washed each 15-cm plate once with phosphate-buffered saline (usually two plates were used per IP), then added 1 ml of 4 C lysis buffer (150 mM KCl, 25 mM Tris-HCl [pH 7.4], 5 mM Na-EDTA [pH 8.0], 0.5% Nonidet P-40, 0.5 mM DTT, 10 ul protease inhibitor cocktail [Pierce Cat# 78437], 100 U/ml SUPERaseIn [Ambion Cat# AM2694]). Following a 30-min incubation at 4 C, we scraped the plates, combined the lysates, and then spun them at 4 C for 30 min at 14,000 RPM in a microcentrifuge. We collected the supernatant and filtered it through a 0.45-um syringe filter. We froze an aliquot of lysate in liquid nitrogen for reference RNA isolation. We then added 0.22 mg/ml heparin to the lysate. We mixed the lysate with 2.5 mg of Dynal m-280 streptavidin beads (250 ul from original storage solution) coupled to biotinylated 4F9 ago antibody (~12.5 ug), which we equilibrated immediately prior to use by washing twice with 1 ml of lysis buffer. We incubated the beads with the lysate for 2 h at 4 C and then washed the beads twice with 1.25 ml of ice-cold lysis buffer for 5-min each. Five percent of the beads were frozen for SDS PAGE analysis after the second wash. RNA was extracted directly from the remaining beads using lysis buffer from Invitrogen's Micro-to-Midi kit (Invitrogen Cat# 12183-018). We purified RNA from the lysate and RNA extracted from the beads with the Micro-to-Midi kit as per vender's instructions, except that the percentage isopropanol used for binding to the column was 70%, instead of 33%, to promote the binding of small RNAs. RNA was amplified with ambion kit 1755. RNA from total cell lysate was labeled with cy3 and IPd RNA was labeled with cy5 An all pairs experiment design type is where all labeled extracts are compared to every other labeled extract.
2010-06-20 | E-GEOD-18834 | biostudies-arrayexpress
Project description:DZIP (DAZ-Interacting Protein) containing a C2H2 zinc-finger domain is expressed predominantly in human embryonic stem cells and fetal and adult germ cells; DZIP colocalizes with DAZ and/or DAZL proteins in these tissues. DZIP may associate with DAZ and its other cofactors in an RNA-binding protein complex that functions in both embryonic stem cells and germ cells. To identify mRNAs associated with human DZIP1 protein in HeLa cells, we used a modified Ribonucleoprotein-ImmunoPrecipitation Microarray (RIP-Chip).DZIP1 ribonucleoprotein (RNP) complexes were performed with 2 µg of anti-DZIP1 antibody (rabbit polyclonal, Santa Cruz Biotechnology, CA, USA) bound to protein A-agarose beads (Sigma, Deisenhofen, Germany). HeLa cells were lysed in polysome lysis buffer (Tris-HCl pH 7,4 15mM, MgCl2 15 mM, NaCl 0,3 M, 1% Triton X-100, 1 mM DTT, 100 U / ml RNase Out, PMSF 1mM and E64 10uM) for one hour at 4°C. Beads were washed, then buffer and cell lysate were added, and the reaction mixtures were tumbled for 2 hours at 4°C. After this incubation, the beads were thoroughly washed again with polysome lysis buffer and then either RNA extracted for microarray and RT-PCR experiments using the RNeasy mini kit (Qiagen). To control for non-specifically enriched RNAs, identical IPs were performed with beads precoated with rabbit IgG as a negative control. RNA was processed for hybridization with GeneChip 3? IVT Express (Affymetrix - Santa Clara, USA), according to the manufacturers instruction. Briefly, cDNA was synthesized from immunoprecipitated RNA using reverse transcriptase followed by second strand synthesis to generate double-stranded cDNA. An in vitro transcription reaction was used to generate biotinylated cRNA. After purification and fragmentation, cRNA was hybridized onto GeneChip Affymetrix Human Genome U133 Plus 2.0 arrays. Post hybridization washes were preformed on an Affymetrix GeneChip® Fluidics Station 450. Arrays were scanned on an Affymetrix GeneChip® Scanner 3000. Scanned arrays were normalized using GCRMA in Partek software (Partek Incorporated. St. Louis, MO). Differentially enriched RNAs were found after performing One-way ANOVA analysis comparing immunoprecipitated samples against control samples. Final lists of genes were obtained by filtering the data from the statistical results according to fold enrichment more than 2 and false discovery rate (FDR 5%). DZIP IP and control IP samples were analyzed for each of 3 technical replicates.
2011-11-01 | E-GEOD-28882 | biostudies-arrayexpress
Project description:C. elegans GLD-2 forms an active PAP with multiple RNA-binding partners to regulate diverse aspects of germline and early embryonic development. One GLD-2 partner, RNP-8, was previously shown to influence oocyte fate specification. To identify transcripts selectively associated with both GLD-2 and RNP-8, we employ a genomic approach using the method of RNA immunoprecipitation followed by microarray analysis (RIP-chip). We used microarrays to identify mRNAs selectively associated with either GLD-2 or RNP-8. Worm extracts were prepared from synchronized adult C. elegans (15 h after L4 stage). For GLD-2 IP, an immoblized anti-GLD-2 antibody was then used to purify the GLD-2 complexes from either wild-type (N2) or gld-2(RNAi) worm extracts. RNA was then extracted from the pellets and analyzed on C.elegans Affymetrix genechip. Four biological replicates were performed, each sample processed in parallel. For RNP-8 IP, an immoblized anti-RNP-8 antibody was then used to purify the RNP-8 complexes from either wild-type (N2) or rnp-8(q784) worm extracts and three biological replicates were performed. For wt or gld-2(RNAi) samples, total RNA was extracted from worm extracts and hybridized on C.elegans Affymetrix genechip.
2010-09-21 | E-GEOD-23843 | biostudies-arrayexpress
Project description:Circadian behaviors are regulated by intrinsic biological clocks consisting of central molecular oscillators and output pathways. Despite significant progress in elucidating the central timekeeping mechanisms, the molecular pathways coupling the circadian pacemaker to overt rhythmic behavior and physiology remain elusive. The Drosophila LARK RNA-binding protein is a candidate for such a coupling factor. Previous research indicates that LARK functions downstream of the clock to mediate behavioral outputs. To better understand the roles of LARK in the Drosophila circadian system, we sought to identify RNA molecules associated with LARK in vivo, using a novel strategy that involves capturing the RNA ligands by immunoprecipitation, visualizing the captured RNAs using whole gene microarrays, and identifying functionally relevant targets through genetic screens. Experiment Overall Design: LARK-containing ribonucleoprotein complexes (LARK-RNPs) were precipitated from lysates of hand-dissected pharate adult brains using an affinity-purified anti-LARK antibody (around 1000 brains were used per immunoprecipitation experiment). A portion of each lysate was saved prior to immunoprecipitations (IPs) in order to measure the relative abundance of transcripts in a total RNA sample. RNAs extracted from the LARK-RNP and total RNA samples were labeled and hybridized to Drosophila whole-genome gene microarrays; signal intensities for individual genes were compared between samples to identify those RNAs that were enriched by immunoprecipitation (relative to their abundances in total RNA). RNAs that were selectively enriched in the LARK-RNP samples were considered to be potential targets of the RNA-binding protein. Experiment Overall Design: Due to the difficulty to dissect large amount of fly brains, only two such immunoprecipitation experiments were performed, each generating an IP RNA sample and a total RNA (control) sample. The amount of RNAs obtained from IP is very small thus only one array is used for each sample - i.e. there are only biological replicates and no technical replicate.
2008-06-14 | E-GEOD-6418 | biostudies-arrayexpress
Project description:The presence of the PUF (Pumilio/FBF) domain defines a conserved family of RNA-binding proteins involved in repressing gene expression. It has been suggested that a conserved function of PUF proteins is to repress differentiation and sustain the mitotic proliferation of stem cells. In humans, Pumilio2 (PUM2) is expressed in embryonic stem cells and adult germ cells. To identify mRNAs associated with human PUM2 protein in adipose tissue stem cells (ADSC), we used a modified Ribonucleoprotein-ImmunoPrecipitation Microarray (RIP-Chip). PUM2 ribonucleoprotein (RNP) complexes were performed with 2 µg of anti-Pum2 antibody (goat polyclonal, Santa Cruz Biotechnology, CA, USA) bound to protein G-agarose beads (Sigma, Deisenhofen, Germany). ADSCs were lysed in polysome lysis buffer (Tris-HCl pH 7.4 15mM, MgCl2 15 mM, NaCl 0,3 M, 1% Triton X-100, 1 mM DTT, 100 U/ml RNase Out, PMSF 1mM and E64 10uM) for one hour at 4°C. Beads were washed, then buffer and cell lysate were added, and the reaction mixtures were tumbled for 2 hours at 4°C. After this incubation, the beads were thoroughly washed again with polysome lysis buffer and then either RNA extracted for microarray and RT-PCR experiments using the RNeasy mini kit (Qiagen). To control for non-specifically enriched RNAs, identical IPs were performed with beads precoated with preimmune goat serum as a negative control. RNA was processed for hybridization with GeneChip 3’ IVT Express (Affymetrix - Santa Clara, USA), according to the manufacturers instruction. Briefly, cDNA was synthesized from immunoprecipitated RNA using reverse transcriptase followed by second strand synthesis to generate double-stranded cDNA. An in vitro transcription reaction was used to generate biotinylated cRNA. After purification and fragmentation, cRNA was hybridized onto GeneChip Affymetrix Human Genome U133 Plus 2.0 arrays. Post hybridization washes were preformed on an Affymetrix GeneChip Fluidics Station 450. Arrays were scanned on an Affymetrix GeneChip Scanner 3000. Scanned arrays were normalized using GCRMA in Partek software (Partek Incorporated. St. Louis, MO). Differentially enriched RNAs were found after performing One-way ANOVA analysis comparing immunoprecipitated samples against control samples. Final lists of genes were obtained by filtering the data from the statistical results according to fold enrichment more than 2 and a p value associated of less than 0.05 for features with signal well above the background.
2011-08-01 | GSE26626 | GEO
Project description:DZIP (DAZ-Interacting Protein) containing a C2H2 zinc-finger domain is expressed predominantly in human embryonic stem cells and fetal and adult germ cells; DZIP colocalizes with DAZ and/or DAZL proteins in these tissues. DZIP may associate with DAZ and its other cofactors in an RNA-binding protein complex that functions in both embryonic stem cells and germ cells. To identify mRNAs associated with human DZIP1 protein in HeLa cells, we used a modified Ribonucleoprotein-ImmunoPrecipitation Microarray (RIP-Chip).DZIP1 ribonucleoprotein (RNP) complexes were performed with 2 µg of anti-DZIP1 antibody (rabbit polyclonal, Santa Cruz Biotechnology, CA, USA) bound to protein A-agarose beads (Sigma, Deisenhofen, Germany). HeLa cells were lysed in polysome lysis buffer (Tris-HCl pH 7,4 15mM, MgCl2 15 mM, NaCl 0,3 M, 1% Triton X-100, 1 mM DTT, 100 U / ml RNase Out, PMSF 1mM and E64 10uM) for one hour at 4°C. Beads were washed, then buffer and cell lysate were added, and the reaction mixtures were tumbled for 2 hours at 4°C. After this incubation, the beads were thoroughly washed again with polysome lysis buffer and then either RNA extracted for microarray and RT-PCR experiments using the RNeasy mini kit (Qiagen). To control for non-specifically enriched RNAs, identical IPs were performed with beads precoated with rabbit IgG as a negative control. RNA was processed for hybridization with GeneChip 3? IVT Express (Affymetrix - Santa Clara, USA), according to the manufacturers instruction. Briefly, cDNA was synthesized from immunoprecipitated RNA using reverse transcriptase followed by second strand synthesis to generate double-stranded cDNA. An in vitro transcription reaction was used to generate biotinylated cRNA. After purification and fragmentation, cRNA was hybridized onto GeneChip Affymetrix Human Genome U133 Plus 2.0 arrays. Post hybridization washes were preformed on an Affymetrix GeneChip® Fluidics Station 450. Arrays were scanned on an Affymetrix GeneChip® Scanner 3000. Scanned arrays were normalized using GCRMA in Partek software (Partek Incorporated. St. Louis, MO). Differentially enriched RNAs were found after performing One-way ANOVA analysis comparing immunoprecipitated samples against control samples. Final lists of genes were obtained by filtering the data from the statistical results according to fold enrichment more than 2 and false discovery rate (FDR 5%).
2011-11-01 | GSE28882 | GEO