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
10417144
13230424
8278135
Distinct Fragments
8935264
11185466
7464293
Positions with Two Read
1151711
1544499
690810
NRF = Distinct/Total
0.857746
0.845435
0.901688
PBC1 = OneRead/Distinct
0.853803
0.841133
0.899605
PBC2 = OneRead/TwoRead
6.624022
6.091593
9.720353
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
65939
2655
N1
37338
1193
N2
53628
2098
Np
66842
3201
N optimal
66842
3201
N conservative
65939
2655
Optimal Set
pooled-pr1_vs_pooled-pr2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.0136944751967727
1.2056497175141243
Self Consistency Ratio
1.4362847501205207
1.7585917854149204
Reproducibility Test
pass
pass
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
111146
95340
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
69.0
80.0
84.0
84.0
25 percentile
276.0
320.0
336.0
336.0
50 percentile (median)
276.0
320.0
336.0
336.0
75 percentile
276.0
320.0
336.0
336.0
Max size
440.0
687.0
683.0
683.0
Mean
275.8118420815864
319.2893643801133
312.05310840362387
334.7939618802549
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
9830359
12449804
Estimated Fragment Length
130
145
Cross-correlation at Estimated Fragment Length
0.747336168246793
0.785535780070446
Phantom Peak
50
50
Cross-correlation at Phantom Peak
0.7469086
0.7851014
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.7410965
0.7781927
NSC (Normalized Strand Cross-correlation coeff.)
1.008419
1.009436
RSC (Relative Strand Cross-correlation coeff.)
1.073574
1.062873
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
0.4019047631281986
0.3982103338097424
Synthetic AUC
0.49848104109764674
0.4986415719823656
X-intercept
0.018672741830176285
0.018451112837110678
Synthetic X-intercept
0.0
0.0
Elbow Point
0.5432306319221623
0.5694487428045452
Synthetic Elbow Point
0.49866146122515614
0.49995750644280146
JS Distance
0.05734702379393753
0.06775447869856169
Synthetic JS Distance
0.15335217675707385
0.16210574584355447
% Genome Enriched
40.34765802047373
37.384019151939654
Diff. Enrichment
9.981950081577711
10.401304819441387
CHANCE Divergence
0.08489825509704516
0.08878229167064706
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
0.4739720051016852
0.44591252834936085
0.37082952105333017
0.473582018245979
0.3714332707830856
0.420500801656065
0.4363312676280572
0.4602219308917599
0.4608956996333236
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
0.33531043754378537
0.19637198574617917
0.2920743663321104
0.3439112595633242
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
0.027918300885081297
0.014129019985447857
0.02920575378432857
0.03581491191402242
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