ABSTRACT

    DustMasker is a program that identifies and masks out low complexity
    parts of a genome using a new and improved DUST algorithm. The main
    advantages of the new algorithm are symmetry with respect to taking
    reverse complements, context insensitivity, and much better performance.
    The new DUST algorithm is described in [1]. Please cite this paper in
    any publication that uses DustMasker.

[1] Morgulis A, Gertz EM, Schaffer AA, Agarwala R. A Fast and Symmetric 
    DUST Implementation to Mask Low-Complexity DNA Sequences.

SYNOPSIS

    dustmasker [-in input_file_name] [-out output_file_name] [-window
    window_size] [-level level] [-linker linker] 
    [-infmt input_format] [-outfmt output_format] 

DESCRIPTIONS

    DustMasker takes its input as a FASTA formatted file containing one
    or more nucleotide sequences. It then identifies and masks out the
    low complexity parts of the input sequences. The results are reported
    as either a FASTA formatted file with low complexity regions appearing
    in lower case letters, or on several more compact formats that just
    least the low complexity intervals themselves. The behavior of 
    DustMasker is configurable through command line options.

OPTIONS

    In this section, command line options to DustMasker are 
    explained. 

    -in input_file_name

        default: "-"

        Name of the input file (or "-" for standard input). If this option 
        is not provided, standard input is used.

    -infmt input_format

        default: "fasta"

        Input data format. Possible values are "fasta" and "blastdb".

    -level dust_level

        default: 20

        10 times the score threshold used by symmetric DUST algorithm. 
        For explanation, see [1].

    -linker dust_linker

        default: 1

        Maximum difference between the start of a masked interval and 
        the end of the previous masked interval at which those intervals
        should be merged into one.

    -outfmt output_format

        default: interval

        Possible values: interval, acclist, fasta.
        Specifies the output format.

        Output format 'interval'. For each input sequence the output
        contains the defline (as it appears in the input file) followed
        by the masked subinterval of the sequence, one subinterval per
        line, in the form "begin - end".

        Output format 'acclist'. Masked intervals are reported one per
        line in the form: 'sequence_id begin end'.

        Output format 'fasta'. Output file is in the FASTA format. The
        content is identical to the input file except that the masked
        parts are written in lower case letters.

    -out output_file_name

    default: "-"

        Name of the output file ( or "-" for standard output ). If this option 
        is not provided, standard output is used.

    -window dust_window

        default: 64

        The length of the window used by symmetric DUST algorithm. For
        explanation see [1].