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Methyl-MiniSeq Analysis Report for in0001

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        Download the raw data used to create the plots in this report below:

        Note that additional data was saved in in0001_multiqc_report_data when this report was generated.


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        If you use plots from MultiQC in a publication or presentation, please cite:

        MultiQC: Summarize analysis results for multiple tools and samples in a single report
        Philip Ewels, Måns Magnusson, Sverker Lundin and Max Käller
        Bioinformatics (2016)
        doi: 10.1093/bioinformatics/btw354
        PMID: 27312411

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        About MultiQC

        This report was generated using MultiQC, version 1.9

        You can see a YouTube video describing how to use MultiQC reports here: https://youtu.be/qPbIlO_KWN0

        For more information about MultiQC, including other videos and extensive documentation, please visit http://multiqc.info

        You can report bugs, suggest improvements and find the source code for MultiQC on GitHub: https://github.com/ewels/MultiQC

        MultiQC is published in Bioinformatics:

        MultiQC: Summarize analysis results for multiple tools and samples in a single report
        Philip Ewels, Måns Magnusson, Sverker Lundin and Max Käller
        Bioinformatics (2016)
        doi: 10.1093/bioinformatics/btw354
        PMID: 27312411

        Methyl-MiniSeq Analysis Report for in0001

        This report includes summaries of data quality, data processing, and snapshots of the results for your DNA methylation study. This report should assist you to get a general picture of the study and to spot any irregularities in the sample or data. Additional data is provided with Full Bioinformatic Analysis package.


        General Statistics

        Showing 18/36 rows and 6/23 columns.
        Sample Name # Reads% Uniquely Aligned% BS Conversion (Non-CpG)% BS Conversion (Spike-in)Uniq. CpGAvg. CpG Coverage
        Sample_1003
        43640743
        24.6%
        99.2%99.5%
        7859191
        7X
        Sample_1003_R2
        Sample_1008
        37695537
        24.5%
        99.1%99.4%
        7588423
        6X
        Sample_1008_R2
        Sample_1009
        34452060
        23.5%
        99.2%99.3%
        7355841
        6X
        Sample_1009_R2
        Sample_1016
        33431083
        22.9%
        99.2%99.5%
        6952728
        5X
        Sample_1016_R2
        Sample_1021
        42546621
        24.7%
        99.2%99.5%
        7660322
        7X
        Sample_1021_R2
        Sample_1022
        32785101
        23.1%
        99.2%99.5%
        6928757
        5X
        Sample_1022_R2
        Sample_1028
        42118209
        24.3%
        99.1%99.3%
        7726313
        7X
        Sample_1028_R2
        Sample_1029
        39839983
        24.4%
        98.9%99.3%
        7579401
        6X
        Sample_1029_R2
        Sample_1034
        49997653
        23.5%
        99.2%99.4%
        7933065
        8X
        Sample_1034_R2
        Sample_1037
        32728472
        23.1%
        99.2%99.5%
        7009858
        6X
        Sample_1037_R2
        Sample_1038
        38430316
        24.1%
        99.1%99.4%
        7409637
        6X
        Sample_1038_R2
        Sample_1040
        38476471
        24.1%
        99.2%99.4%
        7249669
        7X
        Sample_1040_R2
        Sample_1041
        46312207
        23.7%
        99.2%99.4%
        7743854
        7X
        Sample_1041_R2
        Sample_1046
        37264534
        22.3%
        99.2%99.4%
        7055358
        6X
        Sample_1046_R2
        Sample_1051
        45200077
        24.1%
        99.2%99.4%
        7630596
        7X
        Sample_1051_R2
        Sample_1063
        41269339
        25.4%
        99.2%99.4%
        7585274
        7X
        Sample_1063_R2
        Sample_1067
        38262178
        25.3%
        99.2%99.6%
        7726648
        7X
        Sample_1067_R2
        Sample_1077
        40554132
        23.9%
        99.2%99.4%
        7560318
        7X
        Sample_1077_R2

        Cutadapt

        Cutadapt is a tool to find and remove adapter sequences, primers, poly-Atails and other types of unwanted sequence from your high-throughput sequencing reads.

        Trimmed Sequence Lengths

        This plot shows the number of reads with certain lengths of adapter trimmed.

        Obs/Exp shows the raw counts divided by the number expected due to sequencing errors. A defined peak may be related to adapter length.

        See the cutadapt documentation for more information on how these numbers are generated.

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        Filtered Reads

        This plot shows the number of reads (single-end) or read pairs (paired-end) passing filters.

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        FastQC (trimmed)

        FastQC is a quality control tool for high throughput sequence data, written by Simon Andrews at the Babraham Institute in Cambridge.

        This section of the report shows FastQC results after adapter and quality trimming.

        Sequence Quality Histograms

        The mean quality value across each base position in the read.

        To enable multiple samples to be plotted on the same graph, only the mean quality scores are plotted (unlike the box plots seen in FastQC reports).

        Taken from the FastQC help:

        The y-axis on the graph shows the quality scores. The higher the score, the better the base call. The background of the graph divides the y axis into very good quality calls (green), calls of reasonable quality (orange), and calls of poor quality (red). The quality of calls on most platforms will degrade as the run progresses, so it is common to see base calls falling into the orange area towards the end of a read.

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        Per Sequence Quality Scores

        The number of reads with average quality scores. Shows if a subset of reads has poor quality.

        From the FastQC help:

        The per sequence quality score report allows you to see if a subset of your sequences have universally low quality values. It is often the case that a subset of sequences will have universally poor quality, however these should represent only a small percentage of the total sequences.

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        Per Base Sequence Content

        The proportion of each base position for which each of the four normal DNA bases has been called.

        To enable multiple samples to be shown in a single plot, the base composition data is shown as a heatmap. The colours represent the balance between the four bases: an even distribution should give an even muddy brown colour. Hover over the plot to see the percentage of the four bases under the cursor.

        To see the data as a line plot, as in the original FastQC graph, click on a sample track.

        From the FastQC help:

        Per Base Sequence Content plots out the proportion of each base position in a file for which each of the four normal DNA bases has been called.

        In a random library you would expect that there would be little to no difference between the different bases of a sequence run, so the lines in this plot should run parallel with each other. The relative amount of each base should reflect the overall amount of these bases in your genome, but in any case they should not be hugely imbalanced from each other.

        It's worth noting that some types of library will always produce biased sequence composition, normally at the start of the read. Libraries produced by priming using random hexamers (including nearly all RNA-Seq libraries) and those which were fragmented using transposases inherit an intrinsic bias in the positions at which reads start. This bias does not concern an absolute sequence, but instead provides enrichement of a number of different K-mers at the 5' end of the reads. Whilst this is a true technical bias, it isn't something which can be corrected by trimming and in most cases doesn't seem to adversely affect the downstream analysis.

        Click a sample row to see a line plot for that dataset.
        Rollover for sample name
        Position: -
        %T: -
        %C: -
        %A: -
        %G: -

        Per Sequence GC Content

        The average GC content of reads. Normal random library typically have a roughly normal distribution of GC content.

        From the FastQC help:

        This module measures the GC content across the whole length of each sequence in a file and compares it to a modelled normal distribution of GC content.

        In a normal random library you would expect to see a roughly normal distribution of GC content where the central peak corresponds to the overall GC content of the underlying genome. Since we don't know the the GC content of the genome the modal GC content is calculated from the observed data and used to build a reference distribution.

        An unusually shaped distribution could indicate a contaminated library or some other kinds of biased subset. A normal distribution which is shifted indicates some systematic bias which is independent of base position. If there is a systematic bias which creates a shifted normal distribution then this won't be flagged as an error by the module since it doesn't know what your genome's GC content should be.

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        Overrepresented sequences

        The total amount of overrepresented sequences found in each library.

        FastQC calculates and lists overrepresented sequences in FastQ files. It would not be possible to show this for all samples in a MultiQC report, so instead this plot shows the number of sequences categorized as over represented.

        Sometimes, a single sequence may account for a large number of reads in a dataset. To show this, the bars are split into two: the first shows the overrepresented reads that come from the single most common sequence. The second shows the total count from all remaining overrepresented sequences.

        From the FastQC Help:

        A normal high-throughput library will contain a diverse set of sequences, with no individual sequence making up a tiny fraction of the whole. Finding that a single sequence is very overrepresented in the set either means that it is highly biologically significant, or indicates that the library is contaminated, or not as diverse as you expected.

        FastQC lists all of the sequences which make up more than 0.1% of the total. To conserve memory only sequences which appear in the first 100,000 sequences are tracked to the end of the file. It is therefore possible that a sequence which is overrepresented but doesn't appear at the start of the file for some reason could be missed by this module.

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        Adapter Content

        The cumulative percentage count of the proportion of your library which has seen each of the adapter sequences at each position.

        Note that only samples with ≥ 0.1% adapter contamination are shown.

        There may be several lines per sample, as one is shown for each adapter detected in the file.

        From the FastQC Help:

        The plot shows a cumulative percentage count of the proportion of your library which has seen each of the adapter sequences at each position. Once a sequence has been seen in a read it is counted as being present right through to the end of the read so the percentages you see will only increase as the read length goes on.

        No samples found with any adapter contamination > 0.1%

        Bismark

        Bismark is a tool to map bisulfite converted sequence reads and determine cytosine methylation states.

        Alignment Rates

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        Strand Alignment

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        M-Bias

        This plot shows the average percentage methylation and coverage across reads. See the bismark user guide for more information on how these numbers are generated.

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        Insert Size

        This section of the report has a plot, generated by Picard, that shows the number of reads at a given insert size. Reads with different orientation are summed.

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        CpG Coverage

        CpG Coverage shows the distribution of the detected CpG coverage in each library.

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        Genomic Region Coverage

        This section presents the percentage of a certain type of genomic functional region that is covered in each RRBS library, categorized by coverage. The genomic functional region of interest includes CpG islands, gene promoters, and gene bodies. These regions are derived from public annotation files of the reference assemblies.

        Promoter

        Promoter Coverage shows the distribution of the number of individual CpG methylation measurements in promoters genome wide.

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        Gene Body

        Gene Body Coverage shows the distribution of the number of individual CpG methylation measurements in gene bodies genome wide.

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        Promoter Profile

        Accumulated view of the distribution of methylation percentages around annotated genes. Distances on the x-axis are relative to the nearest TSS. Promoter methylation values were generated using deepTools.

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        Bismark (spike-in)

        Bismark is a tool to map bisulfite converted sequence reads and determine cytosine methylation states.

        This section of the report shows Bismark results for spike-in reads.

        Strand Alignment

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        Samtools (spike-in)

        Samtools is a suite of programs for interacting with high-throughput sequencing data.

        This section of the report shows Samtools results for spike-in reads.

        Mapped reads per contig

        The samtools idxstats tool counts the number of mapped reads per chromosome / contig. Chromosomes with < 0.1% of the total aligned reads are omitted from this plot.

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        MethylDackel (spike-in)

        MethylDackel is a per-base methylation metrics extraction tool for BAM file with BS-seq alignments.

        This section of the report shows the average methylation ratio per contig for spike-in reads.

        Correlation Scatter Plot

        This plot shows the correlation trend between observed and expected values.

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        Correlation Table

        This table shows the Pearson's Correlation Coefficient for each sample.

        Showing 18/18 rows.
        Sample NameCorrelation Coefficient
        Sample_10030.968
        Sample_10080.981
        Sample_10090.976
        Sample_10160.974
        Sample_10210.975
        Sample_10220.977
        Sample_10280.977
        Sample_10290.973
        Sample_10340.980
        Sample_10370.984
        Sample_10380.980
        Sample_10400.975
        Sample_10410.974
        Sample_10460.973
        Sample_10510.978
        Sample_10630.975
        Sample_10670.980
        Sample_10770.975

        Differential Methylation

        This section of the report presents identified differential methylation cytosines (DMCs) and regions (DMRs).

        Workflow Description

        A brief summary of the data workflow:
        1. Data filtering: cytosines with read depth ≥ 5 in ≥ 2 samples in a group are kept, otherwise removed for that group before downstream analyses.
        2. Detecting DMCs and DMRs: DMCs are detected with dss and DMRs are detected with dss. Significant DMCs and DMRs have FDR ≤ 0.05 (if P values are provided by statistical method) and absolute methylation difference ≥ 0.1.
        3. Annotation of DMRs: each DMR is annotated by overlapping its genomic region with other functional regions, including genes, exons, introns, promoters, and CpG islands. The functional regions are derived from the ucsc database. The minimum size for an overlap is 1 bp.
        4. Functional enrichment analyses of the overlapped genes: the overlapped genes identified in previous step are input into g:Profiler for functional enrichment analysis.
        5. Plots: some plots such as heatmaps are generated to visualize the results.
        6. Downloads: all result files are available for downloading at the Comparison Download section.

        Sample Information

        Here is a table of samples used for DMC/DMR analyses. The column group is used to group samples.

        Showing 18/18 rows and 2/2 columns.
        Sample NameComparision GroupSample ID
        line0CONSample_1003
        line1CONSample_1016
        line10PNSSample_1009
        line11PNSSample_1021
        line12PNSSample_1028
        line13PNSSample_1029
        line14PNSSample_1038
        line15PNSSample_1051
        line16PNSSample_1063
        line17PNSSample_1067
        line2CONSample_1022
        line3CONSample_1034
        line4CONSample_1037
        line5CONSample_1040
        line6CONSample_1041
        line7CONSample_1046
        line8CONSample_1077
        line9PNSSample_1008

        Distribution of methylation values per sample

        This figure displays the distribution of methylation values of all cytosines (or a sampled subset for the sake of performance) for each sample using violin plot.


        Distribution of methylation values per group

        This figure displays the distribution of methylation values averaged for each group using density plot. The number of cytosines (n) used is at the top.


        Summary Table

        The table below shows the number of DMCs identified for each comparison.

        Showing 2/2 rows and 9/9 columns.
        Sample NameTypeComparision GroupDMR MethodInputStatOutputPadj<=0.05Padj<=0.05 & methDiff<=-0.1Padj<=0.05 & methDiff>=0.1File Name
        line0_dmcdmcCON vs PNSdss97370610821072669403dms_dss.CON_vs_PNS.tsv.gz
        line0_dmrdmrCON vs PNSdss97370690NA5040dmr_dss.CON_vs_PNS.tsv.gz

        DMC Heatmap

        Here are tab views of DMC comparison heatmaps.

        DMR Heatmap

        Here are tab views of DMR comparison heatmaps.

        Comparison Download

        Showing 1/1 rows and 2/2 columns.
        Sample NameDMCsDMRs
        CON_vs_PNSDownloadDownload

        Instructions to download all files

      • Click here to obtain the code to download all the files. We assume it is in your Download folder.
      • Find and open Terminal (Mac/Linux) or Windows Powershell (Windows).
      • Type cd ~/Download and Enter. If the code is downloaded to a different location, change ~/Download to the path to that folder.
      • Type bash download_links.ps1 (Mac/Linux) or Powershell.exe -ExecutionPolicy Bypass -File .\download_links.ps1 (Windows) and Enter.

      • Download

        This section contains links to download trimmed fastq files, data and/or images generated by various bioinformatics tools. To download individual files, click on the corresponding links. The links will expire in 90 days.

        Showing 18/18 rows and 6/6 columns.

        Instructions to download all files

      • Click here to obtain the code to download all the files. We assume it is in your Download folder.
      • Find and open Terminal (Mac/Linux) or Windows Powershell (Windows).
      • Type cd ~/Download and Enter. If the code is downloaded to a different location, change ~/Download to the path to that folder.
      • Type bash download_links.ps1 (Mac/Linux) or Powershell.exe -ExecutionPolicy Bypass -File .\download_links.ps1 (Windows) and Enter.

      • Summary

        Library Type
        Methyl-MiniSeq
        Directionality
        non-directional
        Genome
        bosTau9
        Trimming
        5'R1: 0bp / 5'R2: 0bp / Illumina adapter / RRBS: On

        Software Versions

        Versions are collected at run time from the software output.

        fastqc
        0.11.9
        trimgalore
        0.6.4_dev
        bismark
        0.22.3
        picard
        2.23.8
        samtools
        1.9
        methyldackel
        0.5.0
        ucsc-bedgraphtobigwig
        377
        deeptools
        3.5.1
        DSS
        2.46.0 ( R version: 4.2.2 )
        nextflow
        22.10.0
        pipeline
        null