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
5120897
10485239
5545972
Distinct Fragments
4420202
8793331
4879387
Positions with Two Read
549296
1259146
541345
NRF = Distinct/Total
0.863169
0.838639
0.879807
PBC1 = OneRead/Distinct
0.85962
0.833929
0.876868
PBC2 = OneRead/TwoRead
6.917391
5.8238
7.903605
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
63174
2482
N1
29472
1495
N2
65886
1846
Np
68454
2847
N optimal
68454
2847
N conservative
63174
2482
Optimal Set
pooled-pr1_vs_pooled-pr2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.0835786874347042
1.1470588235294117
Self Consistency Ratio
2.235545602605863
1.2347826086956522
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
95102
109473
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
82.0
76.0
90.0
90.0
25 percentile
330.0
304.0
360.0
360.0
50 percentile (median)
330.0
304.0
360.0
360.0
75 percentile
330.0
304.0
360.0
360.0
Max size
428.0
433.0
515.0
515.0
Mean
329.6631195979054
303.7868515524376
342.66034422198805
359.26219066818595
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
4823652
9885769
Estimated Fragment Length
200
150
Cross-correlation at Estimated Fragment Length
0.597163006977034
0.743011045406639
Phantom Peak
50
50
Cross-correlation at Phantom Peak
0.5957637
0.7419605
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.5896796
0.7359334
NSC (Normalized Strand Cross-correlation coeff.)
1.012691
1.009617
RSC (Relative Strand Cross-correlation coeff.)
1.229987
1.174312
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
0.38155623124512394
0.3948668667133155
Synthetic AUC
0.4978673493451548
0.49847871401122795
X-intercept
0.019741346443663307
0.019128546306332202
Synthetic X-intercept
0.0
0.0
Elbow Point
0.5899608566426936
0.5650496328189405
Synthetic Elbow Point
0.5005451640994383
0.49883418741834157
JS Distance
0.08103717860334284
0.057223214616995706
Synthetic JS Distance
0.18182842402576482
0.16929628889561477
% Genome Enriched
37.60257415979512
39.716235610674296
Diff. Enrichment
13.078998551631166
10.862986688711734
CHANCE Divergence
0.11146522661517881
0.09242071239889048
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
0.47731209777067274
0.48955373701741434
0.39540338717551193
0.504171241035004
0.38854883616134417
0.505675767653348
0.47342981482281954
0.4895083218973905
0.4917776915094551
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
0.33915136812134705
0.20057541481366242
0.33445780417964854
0.3699515957602076
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
0.03024852516640474
0.023876596623553584
0.029039797289231076
0.0409214670567554
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