Open chromatin assays are known to have significant GC bias. Please take this
into consideration as necessary.
Library complexity quality metrics
Library complexity (filtered non-mito BAM)
rep1
rep2
ctl1
Total Fragments
1855101
1311393
569906
Distinct Fragments
1785140
1278682
549442
Positions with Two Read
61955
30103
14816
NRF = Distinct/Total
0.962287
0.975056
0.964092
PBC1 = OneRead/Distinct
0.963245
0.975533
0.968344
PBC2 = OneRead/TwoRead
27.754451
41.437631
35.910435
Mitochondrial reads are filtered out by default.
The non-redundant fraction (NRF) is the fraction of non-redundant mapped reads
in a dataset; it is the ratio between the number of positions in the genome
that uniquely mapped reads map to and the total number of uniquely mappable
reads. The NRF should be > 0.8. The PBC1 is the ratio of genomic locations
with EXACTLY one read pair over the genomic locations with AT LEAST one read
pair. PBC1 is the primary measure, and the PBC1 should be close to 1.
Provisionally 0-0.5 is severe bottlenecking, 0.5-0.8 is moderate bottlenecking,
0.8-0.9 is mild bottlenecking, and 0.9-1.0 is no bottlenecking. The PBC2 is
the ratio of genomic locations with EXACTLY one read pair over the genomic
locations with EXACTLY two read pairs. The PBC2 should be significantly
greater than 1. See more details at
the ENCODE portal standard for ChIP-Seq pipeline
NRF (non redundant fraction)
PBC1 (PCR Bottleneck coefficient 1)
PBC2 (PCR Bottleneck coefficient 2)
PBC1 is the primary measure. Provisionally
0-0.5 is severe bottlenecking
0.5-0.8 is moderate bottlenecking
0.8-0.9 is mild bottlenecking
0.9-1.0 is no bottlenecking
Replication quality metrics
IDR (Irreproducible Discovery Rate) plots
Reproducibility QC and peak detection statistics
overlap
idr
Nt
47797
825
N1
23715
436
N2
1732
41
Np
49204
905
N optimal
49204
905
N conservative
47797
825
Optimal Set
pooled-pr1_vs_pooled-pr2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.0294369939535954
1.096969696969697
Self Consistency Ratio
13.692263279445728
10.634146341463415
Reproducibility Test
borderline
borderline
Reproducibility QC
N1: Replicate 1 self-consistent peaks (comparing two pseudoreplicates generated by subsampling Rep1 reads)
N2: Replicate 2 self-consistent peaks (comparing two pseudoreplicates generated by subsampling Rep2 reads)
Ni: Replicate i self-consistent peaks (comparing two pseudoreplicates generated by subsampling RepX reads)
Nt: True Replicate consistent peaks (comparing true replicates Rep1 vs Rep2)
Np: Pooled-pseudoreplicate consistent peaks (comparing two pseudoreplicates generated by subsampling pooled reads from Rep1 and Rep2)
Self-consistency Ratio: max(N1,N2) / min (N1,N2)
Rescue Ratio: max(Np,Nt) / min (Np,Nt)
Reproducibility Test: If Self-consistency Ratio >2 AND Rescue Ratio > 2, then 'Fail' else 'Pass'
Number of raw peaks
rep1
rep2
Number of peaks
82351
67934
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
450.0
450.0
444.0
444.0
25 percentile
450.0
450.0
444.0
444.0
50 percentile (median)
450.0
450.0
444.0
444.0
75 percentile
450.0
450.0
444.0
444.0
Max size
450.0
450.0
444.0
444.0
Mean
450.0
450.0
444.0
444.0
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
1855101
1311393
Estimated Fragment Length
120
120
Cross-correlation at Estimated Fragment Length
0.419970693004617
0.344289308669421
Phantom Peak
35
35
Cross-correlation at Phantom Peak
0.4187275
0.3430775
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.4100386
0.3354202
NSC (Normalized Strand Cross-correlation coeff.)
1.024222
1.026442
RSC (Relative Strand Cross-correlation coeff.)
1.143073
1.158256
Performed on subsampled (15000000) reads mapped from FASTQs that are trimmed to 50.
Such FASTQ trimming and subsampling reads are for cross-corrleation analysis only.
Untrimmed FASTQs are used for all the other analyses.
NOTE1: For SE datasets, reads from replicates are randomly subsampled to 15000000.
NOTE2: For PE datasets, the first end (R1) of each read-pair is selected and trimmed to 50 the reads are then randomly subsampled to 15000000.
Normalized strand cross-correlation coefficient (NSC) = col9 in outFile
Relative strand cross-correlation coefficient (RSC) = col10 in outFile
Estimated fragment length = col3 in outFile, take the top value
Jensen-Shannon distance (filtered/deduped BAM)
rep1
rep2
AUC
0.3415726418869239
0.3345942938344607
Synthetic AUC
0.49163832605275115
0.49012462061294143
X-intercept
0.04728263471142953
0.05367115571795567
Synthetic X-intercept
5.960425575198212e-122
4.307551343690243e-87
Elbow Point
0.5318668124012701
0.5537509374351773
Synthetic Elbow Point
0.49719240183576413
0.5133476297675638
JS Distance
0.06064375466906696
0.054083590162343674
Synthetic JS Distance
0.20313854163693723
0.20517682567518972
% Genome Enriched
37.7395446059581
41.41867849563594
Diff. Enrichment
13.596483324007746
15.246249316349092
CHANCE Divergence
0.11577447668855832
0.13087798022580086
Peak enrichment
Fraction of reads in peaks (FRiP)
FRiP for spp raw peaks
rep1
rep2
rep1-pr1
rep2-pr1
rep1-pr2
rep2-pr2
pooled
pooled-pr1
pooled-pr2
Fraction of Reads in Peaks
0.4434725186543252
0.3928913579767293
0.32991769249201724
0.0866897793828563
0.333400576208282
0.09095090689839505
0.4887719190073714
0.42139777953448887
0.42533962201696957
FRiP for overlap peaks
rep1_vs_rep2
rep1-pr1_vs_rep1-pr2
rep2-pr1_vs_rep2-pr2
pooled-pr1_vs_pooled-pr2
Fraction of Reads in Peaks
0.26911308236370746
0.16629125824050286
0.024107534818670964
0.27240010189793007
FRiP for IDR peaks
rep1_vs_rep2
rep1-pr1_vs_rep1-pr2
rep2-pr1_vs_rep2-pr2
pooled-pr1_vs_pooled-pr2
Fraction of Reads in Peaks
0.016359160997106943
0.010032376887026398
0.0016029214661719858
0.017277215914899002
For spp raw peaks:
repX: Peak from true replicate X
repX-prY: Peak from Yth pseudoreplicates from replicate X
pooled: Peak from pooled true replicates (pool of rep1, rep2, ...)
pooled-pr1: Peak from 1st pooled pseudo replicate (pool of rep1-pr1, rep2-pr1, ...)
pooled-pr2: Peak from 2nd pooled pseudo replicate (pool of rep1-pr2, rep2-pr2, ...)
For overlap/IDR peaks:
repX_vs_repY: Comparing two peaks from true replicates X and Y
repX-pr1_vs_repX-pr2: Comparing two peaks from both pseudoreplicates from replicate X
pooled-pr1_vs_pooled-pr2: Comparing two peaks from 1st and 2nd pooled pseudo replicates