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
ctl1
Total Fragments
31146772
27033988
Distinct Fragments
25263445
26276132
Positions with Two Read
3870413
630388
NRF = Distinct/Total
0.81111
0.971967
PBC1 = OneRead/Distinct
0.811577
0.975059
PBC2 = OneRead/TwoRead
5.297425
40.642871
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
rep1-pr1_vs_rep1-pr2
Reproducibility QC and peak detection statistics
overlap
idr
Nt
0
0
N1
39070
18353
Np
0
0
N optimal
39070
18353
N conservative
39070
18353
Optimal Set
rep1-pr1_vs_rep1-pr2
rep1-pr1_vs_rep1-pr2
Conservative Set
rep1-pr1_vs_rep1-pr2
rep1-pr1_vs_rep1-pr2
Rescue Ratio
0.0
0.0
Self Consistency Ratio
1.0
1.0
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
Number of peaks
78767
Top 500000 raw peaks from macs2 with p-val threshold 0.01
Peak calling statistics
Peak region size
rep1
idr_opt
overlap_opt
Min size
220.0
220.0
220.0
25 percentile
225.0
373.0
301.0
50 percentile (median)
282.0
456.0
381.0
75 percentile
392.0
589.0
498.0
Max size
17647.0
17647.0
17647.0
Mean
347.80130003681745
537.2794638478723
442.67596621448683
rep1idr_optoverlap_opt
Enrichment / Signal-to-noise ratio
Strand cross-correlation measures (trimmed/filtered SE BAM)
rep1
Number of Subsampled Reads
15000000
Estimated Fragment Length
220
Cross-correlation at Estimated Fragment Length
0.16616076290711
Phantom Peak
40
Cross-correlation at Phantom Peak
0.1550058
Argmin of Cross-correlation
1500
Minimum of Cross-correlation
0.1438081
NSC (Normalized Strand Cross-correlation coeff.)
1.155434
RSC (Relative Strand Cross-correlation coeff.)
1.996191
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
rep1
Jensen-Shannon distance (filtered/deduped BAM)
rep1
AUC
0.24945082727696322
Synthetic AUC
0.48952175321417124
X-intercept
0.1385559994081965
Synthetic X-intercept
3.112080307620775e-77
Elbow Point
0.6425746652111499
Synthetic Elbow Point
0.5087955900091997
JS Distance
0.15584092106815323
Synthetic JS Distance
0.30518794045809017
% Genome Enriched
33.24276340255035
Diff. Enrichment
16.881979335246992
CHANCE Divergence
0.1465946184825221
Peak enrichment
Fraction of reads in peaks (FRiP)
FRiP for macs2 raw peaks
rep1
rep1-pr1
rep1-pr2
Fraction of Reads in Peaks
0.10852749004812066
0.11948342531566696
0.11937514917636047
FRiP for overlap peaks
rep1-pr1_vs_rep1-pr2
Fraction of Reads in Peaks
0.08694006306315379
FRiP for IDR peaks
rep1-pr1_vs_rep1-pr2
Fraction of Reads in Peaks
0.0655259228023199
For macs2 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