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
14628478
17441596
48418825
Distinct Fragments
12368967
14043384
38967817
Positions with Two Read
1575348
2140120
6075902
NRF = Distinct/Total
0.84554
0.805166
0.804807
PBC1 = OneRead/Distinct
0.850463
0.812532
0.809778
PBC2 = OneRead/TwoRead
6.677473
5.331806
5.193512
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
15183
1843
N1
8777
779
N2
20943
1572
Np
18943
2178
N optimal
18943
2178
N conservative
15183
1843
Optimal Set
pooled-pr1_vs_pooled-pr2
pooled-pr1_vs_pooled-pr2
Conservative Set
rep1_vs_rep2
rep1_vs_rep2
Rescue Ratio
1.2476453928736086
1.1817688551275094
Self Consistency Ratio
2.3861228210094567
2.017971758664955
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
26091
59367
Top 300000 raw peaks from spp with FDR 0.01
Peak calling statistics
Peak region size
rep1
rep2
idr_opt
overlap_opt
Min size
98.0
100.0
99.0
99.0
25 percentile
390.0
400.0
396.0
396.0
50 percentile (median)
390.0
400.0
396.0
396.0
75 percentile
390.0
400.0
396.0
396.0
Max size
2066.0
1284.0
2659.0
2659.0
Mean
389.38112759188994
399.0069567268011
357.1299357208448
391.36113603969807
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
rep2
Number of Subsampled Reads
14628478
15000000
Estimated Fragment Length
155
170
Cross-correlation at Estimated Fragment Length
0.821958898273379
0.821506792951753
Phantom Peak
55
55
Cross-correlation at Phantom Peak
0.8198704
0.8163098
Argmin of Cross-correlation
1500
1500
Minimum of Cross-correlation
0.8145346
0.8084202
NSC (Normalized Strand Cross-correlation coeff.)
1.009115
1.016188
RSC (Relative Strand Cross-correlation coeff.)
1.391417
1.65872
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
0.39959733375302053
0.37807724909152607
Synthetic AUC
0.4974537578589065
0.49761076979210334
X-intercept
0.028923546777156174
0.028865583757562676
Synthetic X-intercept
0.0
0.0
Elbow Point
0.4617793847525279
0.5021276425640442
Synthetic Elbow Point
0.4978994515785329
0.5009628816707609
JS Distance
0.053520615691669285
0.08428255381044802
Synthetic JS Distance
0.15036766826601972
0.17722609966116948
% Genome Enriched
35.23152228877976
37.21345781391472
Diff. Enrichment
6.329440068971925
9.408884692257862
CHANCE Divergence
0.05412175895549902
0.08001068750934501
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
0.1641704181715479
0.3523118666025735
0.20049087414612154
0.2988291831848328
0.19589443961253272
0.3040179847775159
0.3133946025099492
0.25526368150324547
0.26161368934288515
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
0.10771585288424922
0.0669389690254183
0.1534414055663053
0.13146985031743702
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
0.021725035282229285
0.01129956822840585
0.020826652516670305
0.02469262592238314
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