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
5256273
4822840
5348967
Distinct Fragments
4543094
4197914
4599748
Positions with Two Read
557285
498637
586697
NRF = Distinct/Total
0.864319
0.870424
0.859932
PBC1 = OneRead/Distinct
0.861201
0.867006
0.855799
PBC2 = OneRead/TwoRead
7.020677
7.299133
6.709531
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
54971
2775
N1
26729
1404
N2
27646
1715
Np
62620
2927
N optimal
62620
2927
N conservative
54971
2775
Optimal Set
pooled-pr1_vs_pooled-pr2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.13914609521384
1.0547747747747749
Self Consistency Ratio
1.0343073066706574
1.2215099715099715
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
82456
98757
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
81.0
82.0
91.0
91.0
25 percentile
324.0
330.0
364.0
364.0
50 percentile (median)
324.0
330.0
364.0
364.0
75 percentile
324.0
330.0
364.0
364.0
Max size
449.0
425.0
554.0
554.0
Mean
323.77381876394685
329.72653077756513
346.4260334813803
363.18361545832005
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
4974291
4546846
Estimated Fragment Length
185
170
Cross-correlation at Estimated Fragment Length
0.604537649698317
0.586222658159604
Phantom Peak
50
50
Cross-correlation at Phantom Peak
0.6038131
0.5850174
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.5977466
0.5788599
NSC (Normalized Strand Cross-correlation coeff.)
1.011361
1.012719
RSC (Relative Strand Cross-correlation coeff.)
1.119432
1.195733
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
0.3861432279560539
0.3799676688310617
Synthetic AUC
0.4978977143382709
0.4978154657471613
X-intercept
0.01963405630823872
0.019779715465810005
Synthetic X-intercept
0.0
0.0
Elbow Point
0.586375880439771
0.5961949039248159
Synthetic Elbow Point
0.5032747315515886
0.49970774463761813
JS Distance
0.06684315859640517
0.07708864392573073
Synthetic JS Distance
0.18107743316637162
0.1891819844309857
% Genome Enriched
38.94446994033961
38.28740746652832
Diff. Enrichment
11.956496224028024
12.867076046397285
CHANCE Divergence
0.10174922146342921
0.10953979176476046
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
0.4355437891063888
0.4992717509748367
0.3694611653234015
0.3917062391405588
0.3766510779550838
0.384345611404359
0.4866823161435401
0.5031072473689636
0.5031055642538707
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
0.3255173917847995
0.18570052261792616
0.19961036923745196
0.35784264291162476
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
0.04570430731580664
0.03024832509631466
0.03603839076369827
0.04759837092112628
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