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
11967518
13199034
18357968
Distinct Fragments
10601577
11689772
15384765
Positions with Two Read
984763
1089798
1985847
NRF = Distinct/Total
0.885863
0.885654
0.838043
PBC1 = OneRead/Distinct
0.894267
0.893939
0.84792
PBC2 = OneRead/TwoRead
9.627336
9.588881
6.56901
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
52896
3126
N1
46137
1871
N2
47086
1801
Np
52291
2952
N optimal
52896
3126
N conservative
52896
3126
Optimal Set
rep1_vs_rep2
rep1_vs_rep2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.0115698686198389
1.0589430894308942
Self Consistency Ratio
1.0205691744153282
1.0388672959466962
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
67086
66663
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
128.0
136.0
132.0
132.0
25 percentile
510.0
544.0
530.0
530.0
50 percentile (median)
510.0
544.0
530.0
530.0
75 percentile
510.0
544.0
530.0
530.0
Max size
726.0
774.0
1132.0
1132.0
Mean
509.0453596875652
542.8775182635045
500.0671785028791
527.815108892922
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
11967518
13199034
Estimated Fragment Length
210
215
Cross-correlation at Estimated Fragment Length
0.805045365594725
0.819612563270743
Phantom Peak
55
55
Cross-correlation at Phantom Peak
0.7978259
0.8132221
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.7873846
0.8038283
NSC (Normalized Strand Cross-correlation coeff.)
1.02243
1.019636
RSC (Relative Strand Cross-correlation coeff.)
1.691443
1.680274
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
0.3837839763631977
0.3877119492783569
Synthetic AUC
0.4972510210355421
0.4973812290907877
X-intercept
0.028985565100756873
0.028877782390700348
Synthetic X-intercept
0.0
0.0
Elbow Point
0.5717832848976463
0.558871315428097
Synthetic Elbow Point
0.4987244588898918
0.4975250902739839
JS Distance
0.11217679193830102
0.1129877218571867
Synthetic JS Distance
0.1757987779435089
0.169911358357305
% Genome Enriched
14.393782135215405
11.78803532079328
Diff. Enrichment
6.4095161748806255
5.455803684022575
CHANCE Divergence
0.06476230815543563
0.05862020713981142
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
0.34642557210556724
0.34781114610227326
0.35740099659011737
0.3590378159003691
0.355547427075707
0.35815862421156724
0.33360283556284975
0.3487060490643585
0.34579309194875596
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
0.28270327168721693
0.25885024848863303
0.2643115793666253
0.27995528027134875
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
0.04537680544441965
0.034705858322604304
0.03182150960453174
0.04395237041740428
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