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
2269790
2181381
11253667
Distinct Fragments
1061627
1146264
10263869
Positions with Two Read
306919
325320
699344
NRF = Distinct/Total
0.46772
0.525476
0.912047
PBC1 = OneRead/Distinct
0.410989
0.491667
0.922068
PBC2 = OneRead/TwoRead
1.421603
1.732387
13.532663
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
14125
1439
N1
7438
634
N2
6659
666
Np
13636
1427
N optimal
14125
1439
N conservative
14125
1439
Optimal Set
rep1_vs_rep2
rep1_vs_rep2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.035860956292168
1.0084092501751927
Self Consistency Ratio
1.1169845322120437
1.0504731861198737
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
29669
33993
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
129.0
118.0
130.0
130.0
25 percentile
516.0
470.0
384.0
520.0
50 percentile (median)
516.0
470.0
520.0
520.0
75 percentile
516.0
470.0
520.0
520.0
Max size
10640.0
3025.0
10663.0
10663.0
Mean
521.9530149314099
469.7868384667432
603.4690757470465
528.0594690265486
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
2269790
2181381
Estimated Fragment Length
175
165
Cross-correlation at Estimated Fragment Length
0.285288953918933
0.290320216246416
Phantom Peak
30
35
Cross-correlation at Phantom Peak
0.2628572
0.2653279
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.2356269
0.2460717
NSC (Normalized Strand Cross-correlation coeff.)
1.210766
1.179819
RSC (Relative Strand Cross-correlation coeff.)
1.823778
2.297886
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
0.2554465998824541
0.27656699306872673
Synthetic AUC
0.48917172867393677
0.489577437823764
X-intercept
0.08588044873138186
0.07341679689137164
Synthetic X-intercept
2.9425852565104843e-72
4.490630860146066e-78
Elbow Point
0.6657306454155915
0.6141856116170415
Synthetic Elbow Point
0.4944629558638893
0.5103239975575844
JS Distance
0.2292435186599832
0.1948479982446204
Synthetic JS Distance
0.3192721958143777
0.29103719542665785
% Genome Enriched
30.529660298129755
30.827031655081157
Diff. Enrichment
29.576644925810903
25.708062565027117
CHANCE Divergence
0.25309506718279084
0.2196624682045583
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
0.3792963781650785
0.36435706262261647
0.3090524457488273
0.2815817762371215
0.3034378474207299
0.2809951151839959
0.38935411412358134
0.35779422933623756
0.35539665252780006
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
0.22589884500745155
0.17742782494371434
0.14066061485529316
0.21843474148802017
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
0.07413008354350567
0.05624281880769395
0.04842541898814772
0.07358062019947266
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