Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Nutrient limitation-induced regulation of Phanaerochaete chrysosporium genes

ABSTRACT: Transcript profiles of Phanerochaete chrysosporium grown on carbon-limited medium, nitrogen-limited medium and replete medium. Array design based on the DoE's Joint Genome Institute's v2.1 annotation. Goal is to define genes involved in lignin degradation. Keywords: gene expression under three different culture conditions From a data set of 10,004 unique alleles, each Roche NimbleGen (Madison, WI) array featured 12 unique 60mer probes per gene, all in triplicate. (Seven gene models composed mostly of repetitive DNA were represented by only 2 to 11 60mers.) Total RNA was purified from the five abovementioned media. In short, cultures were harvested by filtering through Miracloth (Calbiochem, EMD Biosciences, Gibbstown, NJ), squeeze dried and snap frozen in liquid nitrogen. Pellets were stored at -80 C until use. Extraction buffer was prepared by combining 10 ml 690 mM para-aminosalicylic acid (sodium salt) (Sigma-Aldrich, St. Louis, MO) with 10 ml 56 mM triisopropylnapthalene sulfonic acid (sodium salt) (Sigma-Aldrich), and placed on ice. To this was added 5 ml 5X RNB (1.0 M Tris, 1.25 M NaCl, 0.25 M EGTA). The pH of the 5X RNB was adjusted to 8.5 with NaOH. The mixture was kept on ice and shaken just before use. Frozen fungal pellets were ground to a fine powder with liquid nitrogen in an acid washed, pre-chilled mortar and pestle. The ground mycelia were transferred to Falcon 2059 tubes (VWR International, West Chester, PA), and extraction buffer was added to make a thick slurry. The samples were vortexed vigorously and placed on ice until all samples were processed. One half volume TE-saturated phenol (Sigma-Aldrich) and ¼ volume chloroform (Sigma-Aldrich) were added to each sample and vortexed vigorously. Samples were spun at 2940 x g in a fixed-angle rotor for 5 minutes. The aqueous layer was removed to a new tube, and phenol:chloroform extractions were repeated until the interface between the aqueous and organic layers was clear. The final aqueous extractions were placed in clean 2059 tubes, to which was added 0.1 volume 3M sodium acetate, pH 5.2, (DEPC-treated) and 2 volumes absolute ethanol. The tubes were shaken vigorously and stored overnight at -20˚C. The tubes were spun 1 hour at 2940 x g, the supernatants were decanted, and the pellets were resuspended in 4 ml RNase-free H2O. Total RNA was purified using the RNeasy Maxi kit (Qiagen, Valencia, CA) according to the manufacturer’s protocol for RNA cleanup. RNAs were eluted from the RNeasy spin columns using two spins, for a final volume of 2 ml. The eluted RNAs were ethanol precipitated and stored overnight at -20˚C. The RNAs were spun 1 hour at 2940 x g, washed 1x with 70% ethanol, and resuspended in 50-100ul RNase-free H2O. Three biological replicates per medium were used (15 separate arrays). RNA was converted to double-strand cDNA and labeled with the Cy3 fluorophore sample for hybridization to the array by Roche NimbleGen (Iceland). In brief, 10ug of total RNA was incubated with 1X first strand buffer, 10 mM DTT, 0.5mM dNTPs, 100 pM oligo T7 d(T)24 primer, and 400U of SuperScript II (Invitrogen) for 60 min at 42˚C. Second strand cDNA was synthesized by incubation with 1X second strand buffer, 0.2mM dNTPs, 0.07U/ul DNA ligase (Invitrogen), 0.27U/ul DNA polymerase I (Invitrogen), 0.013U/ul RNase H (Invitrogen), at 16˚C for 2 hours. Immediately following, 10U T4 DNA polymerase (Invitrogen) was added for additional 5 minute incubation at 16˚C. Double-stranded cDNA was treated with 27ng/ul of RNase A (EpiCenter Technologies) for 10 minutes at 37˚C. Treated cDNA was purified using an equal volume of phenol:chloroform:isoamyl alcohol (Ambion), ethanol precipitated, washed with 80% ethanol, and resuspended in 20ul water. One ug of each cDNA sample was amplified and labeled with 1 unit per ul of Klenow Fragment (New England BioLabs) and 1 O.D. unit of Cy3 fluorophore (TriLink Biotechnologies, Inc.) for 2 hours at 37˚C. Array hybridization was carried out with 6ug of labeled cDNA suspended in NimbleGen hybridization solution for 17 hours at 42˚C. Arrays were scanned on the Axon4000B Scanner (Molecular Dynamics) and data was extracted from the scanned image using NimbleScan v2.4. DNASTAR ArrayStar v2.1 (Madison,WI) software was used to quantify and visualize data. Analyses were based on three biological replicates per culture medium. Quantile normalization and robust multi-array averaging (RMA; ) were applied to the entire dataset.

ORGANISM(S): Phanerochaete chrysosporium

SUBMITTER: Dan Cullen

PROVIDER: E-GEOD-14735 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Transcriptome and secretome analyses of Phanerochaete chrysosporium reveal complex patterns of gene expression.

Vanden Wymelenberg Amber A Gaskell Jill J Mozuch Mike M Kersten Phil P Sabat Grzegorz G Martinez Diego D Cullen Dan D

Applied and environmental microbiology 20090417 12

The wood decay basidiomycete Phanerochaete chrysosporium was grown under standard ligninolytic or cellulolytic conditions and subjected to whole-genome expression microarray analysis and liquid chromatography-tandem mass spectrometry of extracellular proteins. A total of 545 genes were flagged on the basis of significant changes in transcript accumulation and/or peptide sequences of the secreted proteins. Under nitrogen or carbon limitation, lignin and manganese peroxidase expression increased r ...[more]

PMID: 19376920

Similar Datasets

Project description:Transcript profiles of Phanerochaete chrysosporium grown on different substrates were analyzed. Array design based on the DoE's Joint Genome Institute's v2.1 annotation. Goal is to define genes involved in cellulose degradation. Keywords: gene expression under different culture conditions From a data set of 10,004 unique alleles, each Roche NimbleGen (Madison, WI) array featured 12 unique 60mer probes per gene, all in triplicate. (Seven gene models composed mostly of repetitive DNA were represented by only 2 to 11 60mers.) Total RNA was purified from below mentioned media. In short, cultures were harvested by filtering through Miracloth (Calbiochem, EMD Biosciences, Gibbstown, NJ), squeeze dried and snap frozen in liquid nitrogen. Pellets were stored at -80 C until use. Extraction buffer was prepared by combining 10 ml 690 mM para-aminosalicylic acid (sodium salt) (Sigma-Aldrich, St. Louis, MO) with 10 ml 56 mM triisopropylnapthalene sulfonic acid (sodium salt) (Sigma-Aldrich), and placed on ice. To this was added 5 ml 5X RNB (1.0 M Tris, 1.25 M NaCl, 0.25 M EGTA). The pH of the 5X RNB was adjusted to 8.5 with NaOH. The mixture was kept on ice and shaken just before use. Frozen fungal pellets were ground to a fine powder with liquid nitrogen in an acid washed, pre-chilled mortar and pestle. The ground mycelia were transferred to Falcon 2059 tubes (VWR International, West Chester, PA), and extraction buffer was added to make a thick slurry. The samples were vortexed vigorously and placed on ice until all samples were processed. One half volume TE-saturated phenol (Sigma-Aldrich) and ¼ volume chloroform (Sigma-Aldrich) were added to each sample and vortexed vigorously. Samples were spun at 2940 x g in a fixed-angle rotor for 5 minutes. The aqueous layer was removed to a new tube, and phenol:chloroform extractions were repeated until the interface between the aqueous and organic layers was clear. The final aqueous extractions were placed in clean 2059 tubes, to which was added 0.1 volume 3M sodium acetate, pH 5.2, (DEPC-treated) and 2 volumes absolute ethanol. The tubes were shaken vigorously and stored overnight at -20˚C. The tubes were spun 1 hour at 2940 x g, the supernatants were decanted, and the pellets were resuspended in 4 ml RNase-free H2O. total RNA was purified using the RNeasy Maxi kit (Qiagen, Valencia, CA) according to the manufacturer’s protocol for RNA cleanup. RNAs were eluted from the RNeasy spin columns using two spins, for a final volume of 2 ml. The eluted RNAs were ethanol precipitated and stored overnight at -20˚C. The RNAs were spun 1 hour at 2940 x g, washed 1x with 70% ethanol, and resuspended in 50-100ul RNase-free H2O. Three biological replicates per medium were used (15 separate arrays). RNA was converted to double-strand cDNA and labeled with the Cy3 fluorophore sample for hybridization to the array by Roche NimbleGen (Iceland). In brief, 10ug of total RNA was incubated with 1X first strand buffer, 10 mM DTT, 0.5mM dNTPs, 100 pM oligo T7 d(T)24 primer, and 400U of SuperScript II (Invitrogen) for 60 min at 42˚C. Second strand cDNA was synthesized by incubation with 1X second strand buffer, 0.2mM dNTPs, 0.07U/ul DNA ligase (Invitrogen), 0.27U/ul DNA polymerase I (Invitrogen), 0.013U/ul RNase H (Invitrogen), at 16˚C for 2 hours. Immediately following, 10U T4 DNA polymerase (Invitrogen) was added for additional 5 minute incubation at 16˚C. Double-stranded cDNA was treated with 27ng/ul of RNase A (EpiCenter Technologies) for 10 minutes at 37˚C. Treated cDNA was purified using an equal volume of phenol:chloroform:isoamyl alcohol (Ambion), ethanol precipitated, washed with 80% ethanol, and resuspended in 20ul water. One ug of each cDNA sample was amplified and labeled with 1 unit per ul of Klenow Fragment (New England BioLabs) and 1 O.D. unit of Cy3 fluorophore (TriLink Biotechnologies, Inc.) for 2 hours at 37˚C. Array hybridization was carried out with 6ug of labeled cDNA suspended in NimbleGen hybridization solution for 17 hours at 42˚C. Arrays were scanned on the Axon4000B Scanner (Molecular Dynamics) and data was extracted from the scanned image using NimbleScan v2.4. DNASTAR ArrayStar v2.1 (Madison,WI) software was used to quantify and visualize data. Analyses were based on three biological replicates per culture medium. Quantile normalization and robust multi-array averaging (RMA) were applied to the entire dataset.

Project description:Transcript profiles of Phanerochaete chrysosporium grown on ball-milled aspen or ball-milled pine were analyzed. Array design based on the DoE's Joint Genome Institute's v2.1 annotation. Goal is to define genes involved in lignocellulose degradation. From a data set of 10,004 unique alleles, each Roche NimbleGen (Madison, WI) array featured 12 unique 60mer probes per gene, all in triplicate. (Seven gene models composed mostly of repetitive DNA were represented by only 2 to 11 60mers.) Total RNA was purified from medium containing ball-milled aspen or ball-milled pine as the sole carbon source. In short, cultures were harvested by filtering through Miracloth (Calbiochem, EMD Biosciences, Gibbstown, NJ), squeeze dried and snap frozen in liquid nitrogen. Pellets were stored at -80 C until use. Extraction buffer was prepared by combining 10 ml 690 mM para-aminosalicylic acid (sodium salt) (Sigma-Aldrich, St. Louis, MO) with 10 ml 56 mM triisopropylnapthalene sulfonic acid (sodium salt) (Sigma-Aldrich), and placed on ice. To this was added 5 ml 5X RNB (1.0 M Tris, 1.25 M NaCl, 0.25 M EGTA). The pH of the 5X RNB was adjusted to 8.5 with NaOH. The mixture was kept on ice and shaken just before use. Frozen fungal pellets were ground to a fine powder with liquid nitrogen in an acid washed, pre-chilled mortar and pestle. The ground mycelia were transferred to Falcon 2059 tubes (VWR International, West Chester, PA), and extraction buffer was added to make a thick slurry. The samples were vortexed vigorously and placed on ice until all samples were processed. One half volume TE-saturated phenol (Sigma-Aldrich) and M-BM-< volume chloroform (Sigma-Aldrich) were added to each sample and vortexed vigorously. Samples were spun at 2940 x g in a fixed-angle rotor for 5 minutes. The aqueous layer was removed to a new tube, and phenol:chloroform extractions were repeated until the interface between the aqueous and organic layers was clear. The final aqueous extractions were placed in clean 2059 tubes, to which was added 0.1 volume 3M sodium acetate, pH 5.2, (DEPC-treated) and 2 volumes absolute ethanol. The tubes were shaken vigorously and stored overnight at -20M-KM-^ZC. The tubes were spun 1 hour at 2940 x g, the supernatants were decanted, and the pellets were resuspended in 4 ml RNase-free H2O. Total RNA was purified using the RNeasy Maxi kit (Qiagen, Valencia, CA) according to the manufacturerM-bM-^@M-^Ys protocol for RNA cleanup. RNAs were eluted from the RNeasy spin columns using two spins, for a final volume of 2 ml. The eluted RNAs were ethanol precipitated and stored overnight at -20M-KM-^ZC. The RNAs were spun 1 hour at 2940 x g, washed 1x with 70% ethanol, and resuspended in 50-100ul RNase-free H2O. Three biological replicates per medium were used (6 separate arrays). RNA was converted to double-strand cDNA and labeled with the Cy3 fluorophore sample for hybridization to the array by Roche NimbleGen (Iceland). In brief, 10ug of total RNA was incubated with 1X first strand buffer, 10 mM DTT, 0.5mM dNTPs, 100 pM oligo T7 d(T)24 primer, and 400U of SuperScript II (Invitrogen) for 60 min at 42M-KM-^ZC. Second strand cDNA was synthesized by incubation with 1X second strand buffer, 0.2mM dNTPs, 0.07U/ul DNA ligase (Invitrogen), 0.27U/ul DNA polymerase I (Invitrogen), 0.013U/ul RNase H (Invitrogen), at 16M-KM-^ZC for 2 hours. Immediately following, 10U T4 DNA polymerase (Invitrogen) was added for additional 5 minute incubation at 16M-KM-^ZC. Double-stranded cDNA was treated with 27ng/ul of RNase A (EpiCenter Technologies) for 10 minutes at 37M-KM-^ZC. Treated cDNA was purified using an equal volume of phenol:chloroform:isoamyl alcohol (Ambion), ethanol precipitated, washed with 80% ethanol, and resuspended in 20ul water. One ug of each cDNA sample was amplified and labeled with 1 unit per ul of Klenow Fragment (New England BioLabs) and 1 O.D. unit of Cy3 fluorophore (TriLink Biotechnologies, Inc.) for 2 hours at 37M-KM-^ZC. Array hybridization was carried out with 6ug of labeled cDNA suspended in NimbleGen hybridization solution for 17 hours at 42M-KM-^ZC. Arrays were scanned on the Axon4000B Scanner (Molecular Dynamics) and data was extracted from the scanned image using NimbleScan v2.4. DNASTAR ArrayStar v2.1 (Madison,WI) software was used to quantify and visualize data. Analyses were based on three biological replicates per culture medium. Quantile normalization and robust multi-array averaging (RMA) were applied to the entire dataset.

Project description:Transscript profiles of Ceriporiopsis subvermispora grown on different substrates were analyszed. Array design was based on the DoE's Joint Genome Institute's gene models for C. subvermispora version 1. The research goal is to identtify genes essential for lignocellulose depolymerization. From a data set of 12,125 unique gene models, each NimbleGen (Madison, WI) array targeted 12083 genes and featured 8 unique 60mers per gene, all in quadruplicate. Total RNA was purified from 5-day old cultures containing microcrystalline cellulose (Avicel) or glucose or ball-milled Populus as sole carbon source. Three biological replicates per medium were used (9 separate arrays). In short, cultures were harvested by filtering through Miracloth (Calbiochem, EMD Biosciences, Gibbstown, NJ), squeeze dried and snap frozen in liquid nitrogen. Pellets were stored at -80 C until use. Extraction buffer was prepared by combining 10 ml 690 mM para-aminosalicylic acid (sodium salt) (Sigma-Aldrich, St. Louis, MO) with 10 ml 56 mM triisopropylnapthalene sulfonic acid (sodium salt) (Sigma-Aldrich), and placed on ice. To this was added 5 ml 5X RNB (1.0 M Tris, 1.25 M NaCl, 0.25 M EGTA). The pH of the 5X RNB was adjusted to 8.5 with NaOH. The mixture was kept on ice and shaken just before use. Frozen fungal pellets were ground to a fine powder with liquid nitrogen in an acid washed, pre-chilled mortar and pestle. The ground mycelia were transferred to Falcon 2059 tubes (VWR International, West Chester, PA), and extraction buffer was added to make a thick slurry. The samples were vortexed vigorously and placed on ice until all samples were processed. One half volume TE-saturated phenol (Sigma-Aldrich) and ¼ volume chloroform (Sigma-Aldrich) were added to each sample and vortexed vigorously. Samples were spun at 2940 x g in a fixed-angle rotor for five minutes. The aqueous layer was removed to a new tube, and phenol:chloroform extractions were repeated until the interface between the aqueous and organic layers was clear. The final aqueous extractions were placed in clean 2059 tubes, to which was added 0.1 volume 3M sodium acetate, pH 5.2, (DEPC-treated) and two volumes absolute ethanol. The tubes were shaken vigorously and stored overnight at -20 0C. The tubes were spun 1 hour at 2940 x g, the supernatants were decanted, and the pellets were resuspended in 4 ml RNase-free H2O. Total RNA was purified using the RNeasy Maxi kit (Qiagen, Valencia, CA) according to the manufacturer’s protocol for RNA cleanup. RNAs were eluted from the RNeasy spin columns using two spins, for a final volume of 2 ml. The eluted RNAs were ethanol precipitated and stored overnight at -20C. The RNAs were spun one hour at 2940 x g, washed once with 70% ethanol, and resuspended in 50-100 ?l RNase-free H2O. Three biological replicates per medium were used (nine separate arrays). RNA was converted to double-strand cDNA using Invitrogen's ds cDNA Synthesis kit (Carlsbad, CA) and labeled with the Cy3 fluorophore sample for hybridization to the array by Roche NimbleGen (Iceland). In brief, 10 ?g of total RNA was incubated with 1X first strand buffer, 10 mM DTT, 0.5 mM dNTPs, 100pM oligo T7 d(T)24 primer, and 400U of SuperScript II (Invitrogen) for 60 min at 42°C. Second strand cDNA was synthesized by incubation with 1X second strand buffer, 0.2 mM dNTPs, 0.07 U/ul DNA ligase (Invitrogen, Carlsbad, CA), 0.27 U/ul DNA polymerase I (Invitrogen, Carlsbad, CA), 0.013 U/ul RNase H (Invitrogen), at 16°C for two hours. Immediately following, 10U T4 DNA polymerase (Invitrogen) was added for an additional five minute incubation at 16°C. Double-stranded cDNA was treated with 27 ng/ul of RNase A (EpiCentre Technologies, Madison, WI) for 10 min at 37°C. Treated cDNA was purified using an equal volume of phenol:chloroform:isoamyl alcohol (Ambion/Life Technologies, Grand Island, NY), ethanol precipitated, washed with 80% ethanol, and resuspended in 20 ?l water. One ?g of each cDNA sample was amplified and labeled with one unit per ?l of Klenow Fragment (New England BioLabs, UK) and one OD unit of Cy3 fluorophore (TriLink Biotechnologies, Inc., San Diego, CA) for two hours at 37°C. Array hybridization was carried out with 6 ?g of labeled cDNA suspended in NimbleGen hybridization solution for 17 hours at 42°C. Arrays were scanned on the Axon 4000B Scanner (Molecular Devices, Sunnyvale, CA) and data was extracted from the scanned image using NimbleScan v2.4. DNASTAR ArrayStar v4 (Madison, WI) software was used to quantify and visualize data. .

Project description:Transcript profiles of Postia placenta grown on media containing ball-milled aspen or ball-milled pine as the sole carbon source were analyzed. Array design was based on the DoE's Joint Genome Institute's gene models for P. placenta version 1. The research goal is to identtify genes essential for cellulose depolymerization. From a data set of 12,438 unique alleles, each NimbleGen (Madison, WI) array featured 10 unique 60mers per gene, all in triplicate. The dataset was manually annotated to include only the ‘best allelic model’ among CAZY-encoding genes. Total RNA was purified from medium containing ball-milled aspen or ball-milled pine as the sole carbon source. Three biological replicates per medium were used (6 separate arrays). RNA was converted to double-strand cDNA and labeled with the Cy3 fluorophore sample for hybridization to the Postia placenta MAD-698 whole genome expression array by Roche NimbleGen (Iceland). In brief, 10ug of total RNA was incubated with 1X first strand buffer, 10 mM DTT, 0.5mM dNTPs, 100 pM oligo T7 d(T)24 primer, and 200 units of SuperScript II (Invitrogen) for 60 min at 42°C. Second strand cDNA was synthesized by incubation with 1X second strand buffer, 0.2mM dNTPs, 0.07 units per ul DNA ligase (Invitrogen), 0.27 units per ul DNA polymerase I (Invitrogen), 0.013 units per ul RNase H (Invitrogen), at 16°C for 2 hours. Immediately following, 10 units T4 DNA polymerase (Invitrogen) was added for additional 5 minute incubation at 16°C. Double-stranded cDNA was treated with 27ng/ul of RNase A (EpiCenter Technologies) for 10 minutes at 37°C. Treated cDNA was purified using an equal volume of phenol:chloroform:isoamyl alcohol (Ambion), ethanol precipitated, washed with 80% ethanol, and resuspended in 20ul water. One ug of each cDNA sample was amplified and labeled with 1 unit per ul of Klenow Fragment (New England BioLabs) and 1 O.D unit of Cy3 fluorophore (TriLink Biotechnologies, Inc.) for 2 hours at 37°C. Array hybridization was carried out with 6ug of labeled cDNA suspended in NimbleGen hybridization solution for 17 hours at 42°C.

Project description:MicroPoly(A)Pure kits (Ambion) were used to prepare mRNA from P. salmonis-infected and control Atlantic salmon head kidney. Head kidney mRNA samples were prepared from pooled (n = 10) infected or control kidney. Approximately 200 ng of infected or control head kidney mRNA was used as template in aRNA synthesis reactions. Two infected head kidney samples were pooled to yield 8.9 ug of aRNA, and a single control head kidney sample contained 8.4 ug of aRNA. Infected and control head kidney aRNA samples were visualized on agarose gels to check quality and quantity (data not shown). Except for the amounts of aRNA and reverse transcription (RT) primer used, head kidney target labeling reactions and microarray hybridizations were identical. Head kidney target syntheses used 2 ug of aRNA and 2 ug of random primers (Roche). RT primers were mixed with aRNA samples, and nuclease-free H2O (Invitrogen) was added to make 10 ul total volume. Samples were incubated at 70 degrees C for 4 min, then placed on ice. RT reactions included 50 mM Tris HCl pH 8.3, 75 mM KCl, 3 mM MgCl2, 10 mM DTT, 0.5 mM each dATP, dCTP, and dGTP, 0.2 mM dTTP, 0.05 mM Cy3-dUTP or Cy5-dUTP (Amersham), 40U RNAguard ribonuclease inhibitor (Amersham), and 400U Superscript II Rnase H- reverse transcriptase (Invitrogen). RT reactions were incubated at 42 degrees C for 2.5 h, followed by addition of 0.025U RNase A (Sigma) and 1.5U RNase H (New England BioLabs) and incubation at 37 degrees C for 30 min. Labeled targets were cleaned using the Qiaquick PCR purification kit (Qiagen) and precipitated, with 300 mM sodium acetate, 1 ul of 20 ug/ul glycogen (Invitrogen), and 2.5 volumes of 100% ethanol, at -20 degrees C overnight. Each labeled target was recovered by centrifugation (14,000 rpm, 4 degrees C, 1 h), washed in 70% ethanol, air-dried, and resuspended in 60 ul of hybridization buffer: 50% deionized formamide, 5X SSC, 0.1% SDS, 5 ul of 5 ug/ul oligo dT (5’T18[Q-N]3’), 5 ul of 2 ug/ul BSA (Pierce), and 2 ul of 10 ug/ul sonicated human placental DNA (Sigma). Targets were incubated at 96 degrees C for 3 min, and then at 65 degrees C until applied to microarrays. Microarrays were prepared for hybridization by washing 2 X 5 min in 0.1% SDS, washing 5 X 1 min in MilliQ H2O, immersing 3 min in 95 degrees C MilliQ H2O, and drying by centrifugation (2000 rpm, 5 min, in 50 ml conical tube). Microarray hybridizations were run in the dark under HybriSlips hybridization covers (Grace Biolabs) in slide hybridization chambers (Corning) submerged in a 45 degrees C water bath for 16 h. Coverslips were floated off in 45 degrees C (1X SSC, 0.2% SDS), and arrays were washed 1 X 10 min in 45 degrees C (1X SSC, 0.2% SDS), 3 X 4 min in room temperature (0.1X SSC, 0.1% SDS), and 4 X 4 min in room temperature 0.1X SSC. Slides were dried by centrifugation as before. Fluorescent images of hybridized arrays were acquired immediately at 10 um resolution using ScanArray Express (PerkinElmer). The Cy3 and Cy5 cyanine fluors were excited at 543 nm and 633 nm respectively, and the same laser power (90%) and photomultiplier tube (PMT) settings were used for all slides in a study (PMT 75 Cy3, PMT 63 or 64 Cy5 for head kidney study). Fluorescent intensity data were extracted from TIF images using Imagene 5.5 software (Biodiscovery). Keywords: other

Project description:MicroPoly(A)Pure kits (Ambion) were used to prepare mRNA from P. salmonis-infected and control Atlantic salmon macrophages. Infected and control (24 h incubation) macrophage mRNA samples were subjected to two rounds of amplification using the MessageAmp aRNA kit (Ambion) and manufacturer's instructions. Approximately 400 ng of macrophage mRNA was used as template in the first round of amplification, yielding 8.1 ug of infected macrophage aRNA and 7.8 ug of control macrophage aRNA. Approximately 1 ug of first-round macrophage aRNA was used as template in the second round of amplification, yielding 81.2 ug of infected macrophage aRNA and 83.3 ug of control macrophage aRNA. Infected and control macrophage aRNA samples were visualized on agarose gels to check quality and quantity. Except for the amounts of aRNA and reverse transcription (RT) primer used, macrophage target labeling reactions and microarray hybridizations were identical. Macrophage target syntheses used 5 ug of second-round aRNA and 5 ug of random primers (Roche). RT primers were mixed with aRNA samples, and nuclease-free H2O (Invitrogen) was added to make 10 ul total volume. Samples were incubated at 70 degrees C 4 min, then placed on ice. RT reactions included 50 mM Tris HCl pH 8.3, 75 mM KCl, 3 mM MgCl2, 10 mM DTT, 0.5 mM each dATP, dCTP, and dGTP, 0.2 mM dTTP, 0.05 mM Cy3-dUTP or Cy5-dUTP (Amersham), 40U RNAguard ribonuclease inhibitor (Amersham), and 400U Superscript II Rnase H- reverse transcriptase (Invitrogen). RT reactions were incubated at 42 degrees C for 2.5 h, followed by addition of 0.025U RNase A (Sigma) and 1.5U RNase H (New England BioLabs) and incubation at 37 degrees C for 30 min. Labeled targets were cleaned using the Qiaquick PCR purification kit (Qiagen) and precipitated, with 300 mM sodium acetate, 1 ul of 20 ug/ul glycogen (Invitrogen), and 2.5 volumes of 100% ethanol, at -20 degrees C overnight. Each labeled target was recovered by centrifugation (14,000 rpm, 4 degrees C, 1 h), washed in 70% ethanol, air-dried, and resuspended in 60 ul of hybridization buffer: 50% deionized formamide, 5X SSC, 0.1% SDS, 5 ul of 5 ug/ul oligo dT (5'T18[Q-N]3'), 5 ul of 2 ug/ul BSA (Pierce), and 2 ul of 10 ug/ul sonicated human placental DNA (Sigma). Targets were incubated at 96 degrees C for 3 min, and then at 65 degrees C until applied to microarrays. Microarrays were prepared for hybridization by washing 2 X 5 min in 0.1% SDS, washing 5 X 1 min in MilliQ H2O, immersing 3 min in 95 degrees C MilliQ H2O, and drying by centrifugation (2000 rpm, 5 min, in 50 ml conical tube). Microarray hybridizations were run in the dark under HybriSlips hybridization covers (Grace Biolabs) in slide hybridization chambers (Corning) submerged in a 45 degrees C water bath for 16 h. Coverslips were floated off in 45 degrees C (1X SSC, 0.2% SDS), and arrays were washed 1 X 10 min in 45 degrees C (1X SSC, 0.2% SDS), 3 X 4 min in room temperature (0.1X SSC, 0.1% SDS), and 4 X 4 min in room temperature 0.1X SSC. Slides were dried by centrifugation as before. Fluorescent images of hybridized arrays were acquired immediately at 10 um resolution using ScanArray Express (PerkinElmer). The Cy3 and Cy5 cyanine fluors were excited at 543 nm and 633 nm respectively, and the same laser power (90%) and photomultiplier tube (PMT) settings were used for all slides in a study (PMT 72 Cy3, PMT 63 or 64 Cy5 for macrophage study). Fluorescent intensity data were extracted from TIF images using Imagene 5.5 software (Biodiscovery). Keywords: other

Project description:Transscript profiles of Postia placenta grown on different substrates were analyszed. Array design was based on the DoE's Joint Genome Institute's gene models for P. placenta version 1. The research goal is to identtify genes essential for cellulose depolymerization. Keywords: Culture condition comparison From a data set of 12,438 unique alleles, each NimbleGen (Madison, WI) array featured 10 unique 60mers per gene, all in triplicate. The dataset was manually annotated to include only the âbest allelic modelâ among CAZY-encoding genes (SI Table 1, appended as a supplementary file). Total RNA was purified from 6-day old cultures containing microcrystalline cellulose (Avicel) or glucose as sole carbon source. Three biological replicates per medium were used (6 separate arrays). RNA was converted to double-strand cDNA and labeled with the Cy3 fluorophore sample for hybridization to the Postia placenta MAD-698 whole genome 37K expression array by Roche NimbleGen (Iceland). In brief, 10ug of total RNA was incubated with 1X first strand buffer, 10 mM DTT, 0.5mM dNTPs, 100 pM oligo T7 d(T)24 primer, and 200 units of SuperScript II (Invitrogen) for 60 min at 42Â°C. Second strand cDNA was synthesized by incubation with 1X second strand buffer, 0.2mM dNTPs, 0.07 units per ul DNA ligase (Invitrogen), 0.27 units per ul DNA polymerase I (Invitrogen), 0.013 units per ul RNase H (Invitrogen), at 16Â°C for 2 hours. Immediately following, 10 units T4 DNA polymerase (Invitrogen) was added for additional 5 minute incubation at 16Â°C. Double-stranded cDNA was treated with 27ng/ul of RNase A (EpiCenter Technologies) for 10 minutes at 37Â°C. Treated cDNA was purified using an equal volume of phenol:chloroform:isoamyl alcohol (Ambion), ethanol precipitated, washed with 80% ethanol, and resuspended in 20ul water. One ug of each cDNA sample was amplified and labeled with 1 unit per ul of Klenow Fragment (New England BioLabs) and 1 O.D unit of Cy3 fluorophore (TriLink Biotechnologies, Inc.) for 2 hours at 37Â°C. Array hybridization was carried out with 6ug of labeled cDNA suspended in NimbleGen hybridization solution for 17 hours at 42Â°C. Supplementary file 'si_figure_3.jpg' represents a Neighbor-Joining tree of the cytochrome P450 contingent (P450ome) of P. placenta. The tree shows 254 P450 proteins clustered into 11 fungal clans (indicated by different clan specific color at the branch point). The unrooted phylogenetic tree was constructed using MEGA4 phylogenetic analyses program with 1000 bootstrap replications. Evolutionary distances were computed using the Poisson correction method and are in the units of the number of amino acid substitutions per site. All positions containing gaps and missing data were eliminated from the dataset.

Project description:In mammals, the peptide hormone vasopressin controls renal water excretion, largely through its actions in the renal collecting duct to regulate the molecular water channel aquaporin-2 (AQP2). There are two modes of regulation: 1) short-term regulation by membrane trafficking; and 2) long-term regulation involving vasopressin-induced changes in the abundance of the aquaporin-2 protein. Defects in the long-term regulation have been implicated in multiple water balance disorders. With the objetive to identify genes that are transcriptionally regulated in response to vasopressin in cultured mouse collecting duct cells (mpkCCD), we carried out both RNA-seq to measure all transcripts (n=9) and ChIP-seq for RNA polymerase II (Polr2a) binding along the genome (n=3). Observations were made both after 24-hr treatment with the vasopressin analog dDAVP and with vehicle. Protocol:Confluent monolayers mpkCCD cells were washed in ice-cold 1X PBS (Ca+2/Mg+2-free) followed by cross-linking in 1.11% formaldehyde in Covaris Fixing Buffer (5.5 ml) for 5min at room temperature with gentle rocking (PN 520075, Covaris, Woburn, Massachusetts). Cross-linking was terminated by the addition of 0.3 ml of 1X Covaris Quenching Buffer with rocking. The buffer solution was aspirated and 1X ice-cold PBS was added to each plate. Cells were scraped into 15ml conical tubes, spun down (200 x g, 5 min), and washed twice with PBS. After the second wash, cell pellets were resuspended in 10 ml of 1X Covaris Lysis Buffer for 10 min at 4o C with rocking. Nuclei were pelleted by spinning at 1,700 x g for 5 min at 4o C. Nuclear pellets was resuspended in the 1X Covaris Wash Buffer and incubated for 10 mins at 4o C with rocking. Samples were spun at 1,700 x g for 5 min at 4o C. Nuclear pellets were washed twice with the Covaris Non-ionic Shearing Buffer and spun at 1,700 x g for 5 min at 4o C. Nuclei were resuspended in Covaris Non-ionic Shearing Buffer (Maximum of 1-3x 10^7cells per ml of buffer). Shearing. Two 20 ul aliquots of the resuspended pellets were removed prior to shearing to be used as subsequent unsheared controls for immunoblotting and agarose gel electrophoresis. The remaining samples were transferred to AFA tubes (TC12 x 12 mm) and volumes adjusted to 1 ml (V)). Samples were sheared using a Covaris S2 SonoLAB Single system for two minutes (Duty cycle: 5%; Intensity: 4; cycle: 200). Total nuclear protein concentration of each sample in mcg/ml (R) was determined with the BCA Protein Assay Kit (Thermo Scientific, Rockford, IL). To test shearing efficiency, a 20 ul aliquot from each tube was removed after shearing to test the efficacy of shearing. The aliquots, including the unsheared sample, were incubated with 100 ul 1X TE buffer, 10 ul 10% SDS, and RNAse A (10 ug/ul, Cell Signaling Technology, Danvers, Massachusetts) for 30 mins at 37o C. 1 ul proteinase K (20 ug/ul) was added and the samples were incubated overnight at 65o C. The DNA was purified using DNA Clean & Concentrator columns (Catalog #: D4013, Zymo Research, Irvine, CA) and ran on an E-gel EX 2% agarose (Invitrogen, Carlsbad, CA). Target fragment sizes for chromatin immunoprecipitation were in the range of 150-700 bp in length with average fragment size of 300 bp. Testing epitope integrity (immunoblotting). Total protein content was determined with the BCA Protein Assay Kit (Thermo Scientific, Rockford, IL). Samples were then diluted with sample buffer (5X Laemmli buffer) at 20% (v/v) of the entire sample volume. Proteins were resolved by SDS-PAGE (4-20% polyacrylamide gels, Criterion, Bio-Rad, Hercules, CA) and transferred electrophoretically onto nitrocellulose membranes as previously described (Hwang, 2010). Membranes were probed with anti-RNA polymerase II (Catalog #: MMS-126R, Covance). The antibody was used at a 1:500 dilution (anti-RNA polymerase II) (in Odyssey blocking buffer containing 0.1% Tween 20) overnight at 4°C. After 1-h incubation with secondary antibody (Li-Cor Biosciences 680 anti-rabbit immunoglobulin G or 800 anti-mouse immunoglobulin G; Lincoln, NE) at 1:5000 dilution, sites of antibody-antigen reaction were detected using an Odyssey infrared imager (Li-Cor). Chromatin immunoprecipitation. 10 ul of sample equivalent to 2% input was removed prior to IP. Chromatin Immunoprecipitation was performed using 30-90 ug of sheared chromatin in 500 uL of 1X Covaris Non-ionic Shearing Buffer with 10 μl anti-RNA polymerase II antibodies. Samples were incubated overnight at 4°C with rotation, followed by addition of ChIP Grade Protein G Magnet Beads (Catalog #: 9006, Cell Signaling Technology) and incubation for 2 h at 4o C with rotation. The beads were washed a total of four times, including three low salt washes followed by one high salt wash for 5 mins/wash at 4o C (SimpleChIP protocol #9003, Cell Signaling Technology). Immunoprecipitated chromatin was eluted from the beads with 150 ul of 1X ChIP Elution Buffer for 30 mins at 65o C in a thermomixer. To reverse crosslinks, 6 ul of 5M NaCl and 2 ul of 20 ug/ul Proteinase K were added to the chromatin followed by incubation at 65o C overnight. DNA was purified according to SimpleChIP protocol #9003, Cell Signaling Technology. q-PCR. To check the success of the chromatin immunoprecipitation, input and ChIP’ed DNA samples were amplified with SYBR Green PCR Master Mix (Applied Biosystems) on a 7900HT Fast Real-Time PCR System. Primer sets corresponding to Hox9a and actin genes were used as positive controls for both histone and RNA polymerase II IP’s. (see Supplementary Table X for primer sequences). Library construction, amplification and sequencing. Loaded fixed volume of total eluate. Library construction was performed on a NuGEN instrument using the protocol and reagents outlined in the Ovation SP Ultralow Library Systems kit. Libraries were then enriched via PCR. After amplification, DNA was measured. A fixed amount of the total measured DNA was used for sequencing in an Illumina Hiseq2000 instrument to obtain single read data. High-throughput sequencing and read mapping. Libraries for Illumina sequencing of the samples were prepared using the the protocol and reagents outlined in the Ovation SP Ultralow Library Systems kit , NuGen Mondrian SP+ (NuGEN, San Carlos, CA) . Samples were sequenced using an Illumina HiSeq2000, obtaining 1- by 50-bp reads.

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Nutrient limitation-induced regulation of Phanaerochaete chrysosporium genes

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Transcriptome and secretome analyses of Phanerochaete chrysosporium reveal complex patterns of gene expression.

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