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
789941
2504439
6903214
Distinct Fragments
735092
2100352
6556873
Positions with Two Read
39924
268797
248446
NRF = Distinct/Total
0.930566
0.838652
0.949829
PBC1 = OneRead/Distinct
0.938674
0.849078
0.95933
PBC2 = OneRead/TwoRead
17.283138
6.634605
25.318202
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
6587
1447
N1
1632
237
N2
9162
1517
Np
10057
1978
N optimal
10057
1978
N conservative
6587
1447
Optimal Set
pooled-pr1_vs_pooled-pr2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.5267952026719296
1.3669661368348307
Self Consistency Ratio
5.613970588235294
6.40084388185654
Reproducibility Test
borderline
borderline
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
20154
38400
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
70.0
90.0
84.0
84.0
25 percentile
280.0
360.0
336.0
336.0
50 percentile (median)
280.0
360.0
336.0
336.0
75 percentile
280.0
360.0
336.0
336.0
Max size
332.0
665.0
664.0
664.0
Mean
279.63912870894114
359.45252604166666
322.7077856420627
333.4265685592125
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
789941
2504439
Estimated Fragment Length
115
140
Cross-correlation at Estimated Fragment Length
0.270661907394315
0.452003342809795
Phantom Peak
40
40
Cross-correlation at Phantom Peak
0.2461911
0.4332685
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.2133114
0.4090002
NSC (Normalized Strand Cross-correlation coeff.)
1.268858
1.105142
RSC (Relative Strand Cross-correlation coeff.)
1.744254
1.771991
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
0.27802420190943633
0.31889459973074835
Synthetic AUC
0.48697314791538254
0.49230464822286546
X-intercept
0.10067991110082555
0.04621719648393391
Synthetic X-intercept
1.24431987695937e-49
3.201248998649216e-144
Elbow Point
0.5874687276804418
0.6136377238938476
Synthetic Elbow Point
0.5104853666843442
0.5095109081039741
JS Distance
0.14034574435540625
0.11174834129790731
Synthetic JS Distance
0.26895134900394607
0.24904696441342264
% Genome Enriched
33.30187813471337
31.12688082802319
Diff. Enrichment
20.281354096121373
15.385898634610479
CHANCE Divergence
0.17328915210807855
0.13111262900045306
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
0.21418323233467368
0.29247869186104136
0.14833183655746945
0.287706367284443
0.14917057041993328
0.28292318686121604
0.24758519131773665
0.2829378226096296
0.27889694252426694
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
0.10916249805962239
0.06214451573232793
0.129344580619765
0.1339545804798711
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
0.05518783554548035
0.02909543496845983
0.05580990751762659
0.06591340391879362
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