Provided by: macs_2.2.7.1-5ubuntu1_amd64 
NAME
macs2_callpeak - Model-based Analysis for ChIP-Sequencing
DESCRIPTION
usage: macs2 callpeak [-h] -t TFILE [TFILE ...] [-c [CFILE ...]]
[-f {AUTO,BAM,SAM,BED,ELAND,ELANDMULTI,ELANDEXPORT,BOWTIE,BAMPE,BEDPE}]
[-g GSIZE] [-s TSIZE] [--keep-dup KEEPDUPLICATES] [--outdir OUTDIR] [-n NAME] [-B] [--verbose
VERBOSE] [--trackline] [--SPMR] [--nomodel] [--shift SHIFT] [--extsize EXTSIZE] [--bw BW] [--d-min
D_MIN] [-m MFOLD MFOLD] [--fix-bimodal] [-q QVALUE | -p PVALUE] [--scale-to {large,small}]
[--down-sample] [--seed SEED] [--tempdir TEMPDIR] [--nolambda] [--slocal SMALLLOCAL] [--llocal
LARGELOCAL] [--max-gap MAXGAP] [--min-length MINLEN] [--broad] [--broad-cutoff BROADCUTOFF]
[--cutoff-analysis] [--call-summits] [--fe-cutoff FECUTOFF] [--buffer-size BUFFER_SIZE]
[--to-large] [--ratio RATIO]
options:
-h, --help
show this help message and exit
Input files arguments:
-t TFILE [TFILE ...], --treatment TFILE [TFILE ...]
ChIP-seq treatment file. If multiple files are given as '-t A B C', then they will all be read and
pooled together. REQUIRED.
-c [CFILE ...], --control [CFILE ...]
Control file. If multiple files are given as '-c A B C', they will be pooled to estimate ChIP-seq
background noise.
-f {AUTO,BAM,SAM,BED,ELAND,ELANDMULTI,ELANDEXPORT,BOWTIE,BAMPE,BEDPE}, --format
{AUTO,BAM,SAM,BED,ELAND,ELANDMULTI,ELANDEXPORT,BOWTIE,BAMPE,BEDPE}
Format of tag file, "AUTO", "BED" or "ELAND" or "ELANDMULTI" or "ELANDEXPORT" or "SAM" or "BAM" or
"BOWTIE" or "BAMPE" or "BEDPE". The default AUTO option will let MACS decide which format (except
for BAMPE and BEDPE which should be implicitly set) the file is. Please check the definition in
README. Please note that if the format is set as BAMPE or BEDPE, MACS2 will call its special
Paired-end mode to call peaks by piling up the actual ChIPed fragments defined by both aligned
ends, instead of predicting the fragment size first and extending reads. Also please note that the
BEDPE only contains three columns, and is NOT the same BEDPE format used by BEDTOOLS. DEFAULT:
"AUTO"
-g GSIZE, --gsize GSIZE
Effective genome size. It can be 1.0e+9 or 1000000000, or shortcuts:'hs' for human (2.7e9), 'mm'
for mouse (1.87e9), 'ce' for C. elegans (9e7) and 'dm' for fruitfly (1.2e8), Default:hs
-s TSIZE, --tsize TSIZE
Tag size/read length. This will override the auto detected tag size. DEFAULT: Not set
--keep-dup KEEPDUPLICATES
It controls the behavior towards duplicate tags at the exact same location -- the same
coordination and the same strand. The 'auto' option makes MACS calculate the maximum tags at the
exact same location based on binomal distribution using 1e-5 as pvalue cutoff; and the 'all'
option keeps every tags. If an integer is given, at most this number of tags will be kept at the
same location. Note, if you've used samtools or picard to flag reads as 'PCR/Optical duplicate' in
bit 1024, MACS2 will still read them although the reads may be decided by MACS2 as duplicate
later. If you plan to rely on samtools/picard/any other tool to filter duplicates, please remove
those duplicate reads and save a new alignment file then ask MACS2 to keep all by '--keep-dup
all'. The default is to keep one tag at the same location. Default: 1
Output arguments:
--outdir OUTDIR
If specified all output files will be written to that directory. Default: the current working
directory
-n NAME, --name NAME
Experiment name, which will be used to generate output file names. DEFAULT: "NA"
-B, --bdg
Whether or not to save extended fragment pileup, and local lambda tracks (two files) at every bp
into a bedGraph file. DEFAULT: False
--verbose VERBOSE
Set verbose level of runtime message. 0: only show critical message, 1: show additional warning
message, 2: show process information, 3: show debug messages. DEFAULT:2
--trackline
Tells MACS to include trackline with bedGraph files. To include this trackline while displaying
bedGraph at UCSC genome browser, can show name and description of the file as well. However my
suggestion is to convert bedGraph to bigWig, then show the smaller and faster binary bigWig file
at UCSC genome browser, as well as downstream analysis. Require -B to be set. Default: Not include
trackline.
--SPMR If True, MACS will SAVE signal per million reads for fragment pileup profiles. It won't interfere
with computing pvalue/qvalue during peak calling, since internally MACS2 keeps using the raw
pileup and scaling factors between larger and smaller dataset to calculate statistics
measurements. If you plan to use the signal output in bedGraph to call peaks using bdgcmp and
bdgpeakcall, you shouldn't use this option because you will end up with different results.
However, this option is recommended for displaying normalized pileup tracks across many datasets.
Require -B to be set. Default: False
Shifting model arguments:
--nomodel
Whether or not to build the shifting model. If True, MACS will not build model. by default it
means shifting size = 100, try to set extsize to change it. It's highly recommended that while
you have many datasets to process and you plan to compare different conditions, aka differential
calling, use both 'nomodel' and 'extsize' to make signal files from different datasets comparable.
DEFAULT: False
--shift SHIFT
(NOT the legacy --shiftsize option!) The arbitrary shift in bp. Use discretion while setting it
other than default value. When NOMODEL is set, MACS will use this value to move cutting ends (5')
towards 5'->3' direction then apply EXTSIZE to extend them to fragments. When this value is
negative, ends will be moved toward 3'->5' direction. Recommended to keep it as default 0 for
ChIP-Seq datasets, or -1 * half of EXTSIZE together with EXTSIZE option for detecting enriched
cutting loci such as certain DNAseI-Seq datasets. Note, you can't set values other than 0 if
format is BAMPE or BEDPE for paired-end data. DEFAULT: 0.
--extsize EXTSIZE
The arbitrary extension size in bp. When nomodel is true, MACS will use this value as fragment
size to extend each read towards 3' end, then pile them up. It's exactly twice the number of
obsolete SHIFTSIZE. In previous language, each read is moved 5'->3' direction to middle of
fragment by 1/2 d, then extended to both direction with 1/2 d. This is equivalent to say each read
is extended towards 5'->3' into a d size fragment. DEFAULT: 200. EXTSIZE and SHIFT can be combined
when necessary. Check SHIFT option.
--bw BW
Band width for picking regions to compute fragment size. This value is only used while building
the shifting model. Tweaking this is not recommended. DEFAULT: 300
--d-min D_MIN
Minimum fragment size in basepair. Any predicted fragment size less than this will be excluded.
DEFAULT: 20
-m MFOLD MFOLD, --mfold MFOLD MFOLD
Select the regions within MFOLD range of highconfidence enrichment ratio against background to
build model. Fold-enrichment in regions must be lower than upper limit, and higher than the lower
limit. Use as "-m 10 30". This setting is only used while building the shifting model. Tweaking it
is not recommended. DEFAULT:5 50
--fix-bimodal
Whether turn on the auto pair model process. If set, when MACS failed to build paired model, it
will use the nomodel settings, the --exsize parameter to extend each tags towards 3' direction.
Not to use this automate fixation is a default behavior now. DEFAULT: False
Peak calling arguments:
-q QVALUE, --qvalue QVALUE
Minimum FDR (q-value) cutoff for peak detection. DEFAULT: 0.05. -q, and -p are mutually
exclusive.
-p PVALUE, --pvalue PVALUE
Pvalue cutoff for peak detection. DEFAULT: not set. -q, and -p are mutually exclusive. If pvalue
cutoff is set, qvalue will not be calculated and reported as -1 in the final .xls file.
--scale-to {large,small}
When set to 'small', scale the larger sample up to the smaller sample. When set to 'larger', scale
the smaller sample up to the bigger sample. By default, scale to 'small'. This option replaces the
obsolete ' --to-large' option. The default behavior is recommended since it will lead to less
significant p/q-values in general but more specific results. Keep in mind that scaling down will
influence control/input sample more. DEFAULT: 'small', the choice is either 'small' or 'large'.
--down-sample
When set, random sampling method will scale down the bigger sample. By default, MACS uses linear
scaling. Warning: This option will make your result unstable and irreproducible since each time,
random reads would be selected. Consider to use 'randsample' script instead. <not implmented>If
used together with --SPMR, 1 million unique reads will be randomly picked.</not implemented>
Caution: due to the implementation, the final number of selected reads may not be as you expected!
DEFAULT: False
--seed SEED
Set the random seed while down sampling data. Must be a non-negative integer in order to be
effective. DEFAULT: not set
--tempdir TEMPDIR
Optional directory to store temp files. DEFAULT: /tmp
--nolambda
If True, MACS will use fixed background lambda as local lambda for every peak region. Normally,
MACS calculates a dynamic local lambda to reflect the local bias due to the potential chromatin
accessibility.
--slocal SMALLLOCAL
The small nearby region in basepairs to calculate dynamic lambda. This is used to capture the bias
near the peak summit region. Invalid if there is no control data. If you set this to 0, MACS will
skip slocal lambda calculation. *Note* that MACS will always perform a d-size local lambda
calculation while the control data is available. The final local bias would be the maximum of the
lambda value from d, slocal, and llocal size windows. While control is not available, d and slocal
lambda won't be considered. DEFAULT: 1000
--llocal LARGELOCAL
The large nearby region in basepairs to calculate dynamic lambda. This is used to capture the
surround bias. If you set this to 0, MACS will skip llocal lambda calculation. *Note* that MACS
will always perform a d-size local lambda calculation while the control data is available. The
final local bias would be the maximum of the lambda value from d, slocal, and llocal size windows.
While control is not available, d and slocal lambda won't be considered. DEFAULT: 10000.
--max-gap MAXGAP
Maximum gap between significant sites to cluster them together. The DEFAULT value is the detected
read length/tag size.
--min-length MINLEN
Minimum length of a peak. The DEFAULT value is the predicted fragment size d. Note, if you set a
value smaller than the fragment size, it may have NO effect on the result. For BROAD peak calling,
try to set a large value such as 500bps. You can also use '-- cutoff-analysis' option with default
setting, and check the column 'avelpeak' under different cutoff values to decide a reasonable
minlen value.
--broad
If set, MACS will try to call broad peaks using the --broad-cutoff setting. Please tweak
'--broad-cutoff' setting to control the peak calling behavior. At the meantime, either -q or -p
cutoff will be used to define regions with 'stronger enrichment' inside of broad peaks. The
maximum gap is expanded to 4 * MAXGAP (--max-gap parameter). As a result, MACS will output a
'gappedPeak' and a 'broadPeak' file instead of 'narrowPeak' file. Note, a broad peak will be
reported even if there is no 'stronger enrichment' inside. DEFAULT: False
--broad-cutoff BROADCUTOFF
Cutoff for broad region. This option is not available unless --broad is set. If -p is set, this is
a pvalue cutoff, otherwise, it's a qvalue cutoff. Please note that in broad peakcalling mode,
MACS2 uses this setting to control the overall peak calling behavior, then uses -q or -p setting
to define regions inside broad region as 'stronger' enrichment. DEFAULT: 0.1
--cutoff-analysis
While set, MACS2 will analyze number or total length of peaks that can be called by different
p-value cutoff then output a summary table to help user decide a better cutoff. The table will be
saved in NAME_cutoff_analysis.txt file. Note, minlen and maxgap may affect the results. WARNING:
May take ~30 folds longer time to finish. The result can be useful for users to decide a
reasonable cutoff value. DEFAULT: False
Post-processing options:
--call-summits
If set, MACS will use a more sophisticated signal processing approach to find subpeak summits in
each enriched peak region. DEFAULT: False
--fe-cutoff FECUTOFF
When set, the value will be used to filter out peaks with low fold-enrichment. Note, MACS2 use 1.0
as pseudocount while calculating fold-enrichment. DEFAULT: 1.0
Other options:
--buffer-size BUFFER_SIZE
Buffer size for incrementally increasing internal array size to store reads alignment information.
In most cases, you don't have to change this parameter. However, if there are large number of
chromosomes/contigs/scaffolds in your alignment, it's recommended to specify a smaller buffer size
in order to decrease memory usage (but it will take longer time to read alignment files). Minimum
memory requested for reading an alignment file is about # of CHROMOSOME * BUFFER_SIZE * 8 Bytes.
DEFAULT: 100000
Obsolete options:
--to-large
Obsolete option. Please use '--scale-to large' instead.
--ratio RATIO
Obsolete option. Originally designed to normalize treatment and control with customized ratio, now
it won't have any effect.
macs2 callpeak 2.2.7.1 April 2022 MACS2_CALLPEAK(1)