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
3045873
2681529
8772896
Distinct Fragments
2584274
2236481
8370620
Positions with Two Read
340428
318450
310196
NRF = Distinct/Total
0.848451
0.834032
0.954146
PBC1 = OneRead/Distinct
0.847539
0.832465
0.960597
PBC2 = OneRead/TwoRead
6.433883
5.846419
25.92164
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
9514
212
N1
9134
119
N2
8289
110
Np
8389
193
N optimal
9514
212
N conservative
9514
212
Optimal Set
rep1_vs_rep2
rep1_vs_rep2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.1341041840505424
1.0984455958549222
Self Consistency Ratio
1.1019423332126914
1.0818181818181818
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
29002
29973
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
148.0
150.0
137.0
137.0
25 percentile
520.0
496.0
544.0
544.0
50 percentile (median)
520.0
496.0
544.0
544.0
75 percentile
520.0
496.0
544.0
544.0
Max size
13394.0
13408.0
13433.0
13433.0
Mean
522.1749189711054
498.5301771594435
827.0754716981132
550.3077569896994
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
3045873
2681529
Estimated Fragment Length
100
130
Cross-correlation at Estimated Fragment Length
0.48487994528637
0.446668852235168
Phantom Peak
30
30
Cross-correlation at Phantom Peak
0.4827877
0.4442414
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.4747082
0.4361636
NSC (Normalized Strand Cross-correlation coeff.)
1.021427
1.024086
RSC (Relative Strand Cross-correlation coeff.)
1.258959
1.300509
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
0.34973637409922426
0.34672478686336194
Synthetic AUC
0.493065780017487
0.4925511087460822
X-intercept
0.042563380169279824
0.04412169630992334
Synthetic X-intercept
6.095204309517775e-178
5.282866166037772e-154
Elbow Point
0.5358991344461692
0.5455862341424872
Synthetic Elbow Point
0.5114771057766618
0.4967874778767371
JS Distance
0.07071530897850317
0.07704489781046958
Synthetic JS Distance
0.20097673711992553
0.20372912088312145
% Genome Enriched
39.670618657493684
40.49546871196492
Diff. Enrichment
11.90931307484046
12.346947883160864
CHANCE Divergence
0.10159534200688014
0.10555384868349484
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
0.2342780621628249
0.2387367415996057
0.26288238719960766
0.2673626122004415
0.2646180725846003
0.27025908787911473
0.19724947738838894
0.22657068745194642
0.22333525718756594
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
0.09897530153432817
0.09387222596861207
0.0866488819734379
0.08887773710455209
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
0.016869707819829584
0.014189706964198136
0.015313991190167289
0.01640482208627992
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