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
ctl1
Total Fragments
5355615
1391715
Distinct Fragments
4559558
984761
Positions with Two Read
580709
210255
NRF = Distinct/Total
0.85136
0.707588
PBC1 = OneRead/Distinct
0.852565
0.701121
PBC2 = OneRead/TwoRead
6.694089
3.283808
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
rep1-pr1_vs_rep1-pr2
Reproducibility QC and peak detection statistics
overlap
idr
Nt
0
0
N1
10778
1453
Np
0
0
N optimal
10778
1453
N conservative
10778
1453
Optimal Set
rep1-pr1_vs_rep1-pr2
rep1-pr1_vs_rep1-pr2
Conservative Set
rep1-pr1_vs_rep1-pr2
rep1-pr1_vs_rep1-pr2
Rescue Ratio
0.0
0.0
Self Consistency Ratio
1.0
1.0
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
Number of peaks
18716
Top 500000 raw peaks from macs2 with p-val threshold 0.01
Peak calling statistics
Peak region size
rep1
idr_opt
overlap_opt
Min size
85.0
85.0
85.0
25 percentile
85.0
139.0
85.0
50 percentile (median)
85.0
167.0
97.0
75 percentile
113.0
207.0
140.0
Max size
735.0
735.0
735.0
Mean
106.5363325496901
180.6572608396421
119.54704026721099
rep1idr_optoverlap_opt
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
Number of Subsampled Reads
5355615
Estimated Fragment Length
85
Cross-correlation at Estimated Fragment Length
0.107557828213769
Phantom Peak
40
Cross-correlation at Phantom Peak
0.0874991
Argmin of Cross-correlation
1500
Minimum of Cross-correlation
0.0552178
NSC (Normalized Strand Cross-correlation coeff.)
1.947883
RSC (Relative Strand Cross-correlation coeff.)
1.621373
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
rep1
Jensen-Shannon distance (filtered/deduped BAM)
rep1
AUC
0.13059575354019373
Synthetic AUC
0.47291318057052667
X-intercept
0.5716148411236633
Synthetic X-intercept
4.169100715329775e-11
Elbow Point
0.597630603768076
Synthetic Elbow Point
0.5324629068619062
JS Distance
0.09239210903042445
Synthetic JS Distance
0.24889057172350956
% Genome Enriched
39.23582571898817
Diff. Enrichment
37.79988614248295
CHANCE Divergence
0.422592915864044
Peak enrichment
Fraction of reads in peaks (FRiP)
FRiP for macs2 raw peaks
rep1
rep1-pr1
rep1-pr2
Fraction of Reads in Peaks
0.05200874041459682
0.16957505425559538
0.16961448581617006
FRiP for overlap peaks
rep1-pr1_vs_rep1-pr2
Fraction of Reads in Peaks
0.04311171556304177
FRiP for IDR peaks
rep1-pr1_vs_rep1-pr2
Fraction of Reads in Peaks
0.023296984378406087
For macs2 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