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
10082948
11049853
16332738
Distinct Fragments
9579704
10427426
15422296
Positions with Two Read
420962
516034
783500
NRF = Distinct/Total
0.95009
0.943671
0.944257
PBC1 = OneRead/Distinct
0.953406
0.947297
0.946462
PBC2 = OneRead/TwoRead
21.696376
19.141898
18.630018
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
10084
588
N1
7308
235
N2
9240
357
Np
10720
553
N optimal
10720
588
N conservative
10084
588
Optimal Set
pooled-pr1_vs_pooled-pr2
rep1_vs_rep2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.0630702102340341
1.0632911392405062
Self Consistency Ratio
1.264367816091954
1.5191489361702128
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
17426
22412
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
150.0
146.0
150.0
150.0
25 percentile
600.0
584.0
600.0
600.0
50 percentile (median)
600.0
584.0
600.0
600.0
75 percentile
600.0
584.0
600.0
600.0
Max size
600.0
584.0
600.0
600.0
Mean
599.3181453001263
583.2385329287881
532.4659863945578
596.0833022388059
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
10082948
11049853
Estimated Fragment Length
200
220
Cross-correlation at Estimated Fragment Length
0.792255781610078
0.805623640851941
Phantom Peak
50
50
Cross-correlation at Phantom Peak
0.7916462
0.8044325
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.787713
0.8001357
NSC (Normalized Strand Cross-correlation coeff.)
1.005767
1.006859
RSC (Relative Strand Cross-correlation coeff.)
1.154985
1.27721
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
0.40369771365108953
0.39866046678397055
Synthetic AUC
0.4970713356206877
0.4971927544034481
X-intercept
0.02915003683686162
0.028948382472442233
Synthetic X-intercept
0.0
0.0
Elbow Point
0.44133954402154707
0.45218295840928646
Synthetic Elbow Point
0.5051313226365233
0.5025003621711277
JS Distance
0.016782058151425687
0.022594663103659526
Synthetic JS Distance
0.14169200688354652
0.14836484337699346
% Genome Enriched
32.44718552401184
31.27399637022144
Diff. Enrichment
5.411773096220108
5.837666298973721
CHANCE Divergence
0.046734924678730694
0.050580807457066584
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
0.134658476194171
0.1701287032810003
0.17076492730715795
0.18281408533736265
0.16133069940018993
0.1772559296768063
0.17731344577540212
0.16662197069962123
0.15505645225486908
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
0.0779415264886279
0.06001771668365541
0.07533647722442177
0.0823164875981426
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
0.008288579935715714
0.004439912722285039
0.0062065209100188624
0.007884768103839269
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