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
3779202
2379945
7157741
Distinct Fragments
3137509
2059652
6671860
Positions with Two Read
455561
242397
362351
NRF = Distinct/Total
0.830204
0.86542
0.932118
PBC1 = OneRead/Distinct
0.828788
0.865646
0.940368
PBC2 = OneRead/TwoRead
5.707975
7.355413
17.314711
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
20542
103
N1
9622
64
N2
7800
65
Np
1150
97
N optimal
20542
103
N conservative
20542
103
Optimal Set
rep1_vs_rep2
rep1_vs_rep2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
17.862608695652174
1.0618556701030928
Self Consistency Ratio
1.2335897435897436
1.015625
Reproducibility Test
borderline
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
73107
31068
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
103.0
120.0
151.0
146.0
25 percentile
410.0
480.0
530.0
530.0
50 percentile (median)
410.0
480.0
530.0
530.0
75 percentile
410.0
480.0
530.0
530.0
Max size
410.0
480.0
530.0
530.0
Mean
409.9642031542807
479.89371700785375
484.2330097087379
529.6992989971765
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
3779202
2379945
Estimated Fragment Length
120
100
Cross-correlation at Estimated Fragment Length
0.527153370637383
0.431498795653036
Phantom Peak
30
30
Cross-correlation at Phantom Peak
0.524286
0.4290221
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.5202212
0.4231915
NSC (Normalized Strand Cross-correlation coeff.)
1.013325
1.01963
RSC (Relative Strand Cross-correlation coeff.)
1.705408
1.424767
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
0.38197796975639253
0.36794338426630774
Synthetic AUC
0.49369128147588043
0.49221350785431467
X-intercept
0.03941443912676579
0.043821307377564275
Synthetic X-intercept
2.7032596236207706e-215
7.753569349154904e-141
Elbow Point
0.47130149243012154
0.4997675870750484
Synthetic Elbow Point
0.5069233190281229
0.5055706129949463
JS Distance
0.03798180397359497
0.033199070383678364
Synthetic JS Distance
0.15805806721489027
0.168576483992038
% Genome Enriched
38.84368086214223
38.81914284517309
Diff. Enrichment
7.219113400742311
9.5004175773098
CHANCE Divergence
0.061344117434843255
0.08079208018924619
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
0.35887745023540596
0.20120031341087452
0.2196497863119053
0.2421408165493308
0.2261256150477126
0.2474438753969565
0.4310414857384695
0.06811905821541366
0.05019653713178731
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
0.12362284717388161
0.05675602015236426
0.05711777930425491
0.012175609905561465
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
0.004968675284833246
0.004239496996785001
0.005518504670730187
0.005285800324210562
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