How to generate paired-end FASTQ files from a reference sequence?

I have a reference sequence NC_008253.fa. I want to obtain 2 paired end FASTQ files.

maq.pl easyrun -d outdir NC_008253.fa out1.fq out2.fq

Traceback:

-- CMD: /usr/bin/maq fasta2bfa /home/melissachua/NC_008253.fa outdir/ref.bfa 2> /dev/null
read() on closed filehandle $fh at /usr/bin/maq.pl line 833.
** Cannot guess the format of file '/home/melissachua/out1.fq'. at /usr/bin/maq.pl line 107.

Data:

>gi|110640213|ref|NC_008253.1| Escherichia coli 536, complete genome
AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC
TTCTGAACTGGTTACCTGCCGTGAGTAAATTAAAATTTTATTGACTTAGGTCACTAAATACTTTAACCAA
TATAGGCATAGCGCACAGACAGATAAAAATTACAGAGTACACAACATCCATGAAACGCATTAGCACCACC
ATTACCACCACCATCACCATTACCACAGGTAACGGTGCGGGCTGACGCGTACAGGAAACACAGAAAAAAG
CCCGCACCTGACAGTGCGGGCTTTTTTTTCGACCAAAGGTAACGAGGTAACAACCATGCGAGTGTTGAAG
TTCGGCGGTACATCAGTGGCAAATGCAGAACGTTTTCTGCGGGTTGCCGATATTCTGGAAAGCAATGCCA
GGCAGGGGCAGGTGGCCACCGTCCTCTCTGCCCCCGCCAAAATCACCAACCATCTGGTAGCGATGATTGA
AAAAACCATTAGCGGTCAGGATGCTTTACCCAATATCAGCGATGCCGAACGTATTTTTGCCGAACTTCTG
ACGGGACTCGCCGCCGCCCAGCCGGGATTTCCGCTGGCACAATTGAAAACTTTCGTCGACCAGGAATTTG
CCCAAATAAAACATGTCCTGCATGGCATCAGTTTGTTGGGGCAGTGCCCGGATAGCATCAACGCTGCGCT
GATTTGCCGTGGCGAGAAAATGTCGATCGCCATTATGGCCGGCGTGTTAGAAGCGCGTGGTCACAACGTT
ACCGTTATCGATCCGGTCGAAAAACTGCTGGCAGTGGGTCATTACCTCGAATCTACCGTTGATATTGCTG
AATCCACCCGCCGTATTGCGGCAAGCCGCATTCCGGCTGACCACATGGTGCTGATGGCTGGTTTCACTGC
CGGTAATGAAAAAGGCGAGCTGGTGGTTCTGGGACGCAACGGTTCCGACTACTCCGCTGCGGTGCTGGCG
GCCTGTTTACGCGCCGATTGTTGCGAGATCTGGACGGATGTTGACGGTGTTTATACCTGCGATCCGCGTC
AGGTGCCCGATGCGAGGTTGTTGAAGTCGATGTCCTATCAGGAAGCGATGGAGCTTTCTTACTTCGGCGC
TAAAGTTCTTCACCCCCGCACCATTACCCCCATCGCCCAGTTCCAGATCCCTTGCCTGATTAAAAATACC
GGAAATCCCCAAGCACCAGGTACGCTCATTGGTGCCAGCCGTGATGAAGACGAATTACCGGTCAAGGGCA
TTTCCAATCTGAATAACATGGCAATGTTCAGCGTTTCCGGCCCGGGGATGAAAGGGATGGTTGGCATGGC
GGCGCGCGTCTTTGCAGCGATGTCACGCGCCCGTATTTCCGTGGTGCTGATTACGCAATCATCTTCCGAA
TACAGTATCAGTTTCTGCGTTCCGCAAAGCGACTGTGTGCGAGCTGAACGGGCAATGCAGGAAGAGTTCT
ACCTGGAACTGAAAGAAGGCTTACTGGAGCCGTTGGCGGTGACGGAACGGCTGGCCATTATCTCGGTGGT
AGGTGATGGTATGCGCACCTTACGTGGGATCTCGGCGAAATTCTTTGCCGCGCTGGCCCGCGCCAATATC
AACATTGTCGCCATTGCTCAGGGATCTTCTGAACGCTCAATCTCTGTCGTGGTCAATAACGATGATGCGA
CCACTGGCGTGCGCGTTACTCATCAGATGCTGTTCAATACCGATCAGGTTATCGAAGTGTTTGTGATTGG
CGTCGGTGGCGTTGGCGGTGCGCTGCTGGAGCAACTGAAGCGTCAGCAAAGCTGGTTGAAGAATAAACAT
ATCGACTTACGTGTCTGCGGTGTTGCTAACTCGAAGGCACTGCTCACCAATGTACATGGCCTTAATCTGG
AAAACTGGCAGGAAGAACTGGCGCAAGCCAAAGAGCCGTTTAATCTCGGGCGCTTAATTCGCCTCGTGAA

maq

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updated 4.3 years ago by GenoMax

• written 4.3 years ago by melissachua90 •

use wgsim in samtools https://github.com/samtools/samtools

on a side note , nobody uses maq anymore.

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written 4.3 years ago by Pierre Lindenbaum

How do I use wgsim? I tried:

wgsim NC_008253.fa out1.fq out2.fq /dev/null

but not sure if I did it correctly. Also, should I be using the index file NC_008253.fa.fai instead?

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written 4.3 years ago by melissachua90 •

but not sure if I did it correctly.

Usage:   wgsim [options] <in.ref.fa> <out.read1.fq> <out.read2.fq>

Options: -e FLOAT      base error rate [0.020]
         -d INT        outer distance between the two ends [500]
         -s INT        standard deviation [50]
         -N INT        number of read pairs [1000000]
         -1 INT        length of the first read [70]
         -2 INT        length of the second read [70]
         -r FLOAT      rate of mutations [0.0010]
         -R FLOAT      fraction of indels [0.15]
         -X FLOAT      probability an indel is extended [0.30]
         -S INT        seed for random generator [0, use the current time]
         -A FLOAT      discard if the fraction of ambiguous bases higher than FLOAT [0.05]
         -h            haplotype mode

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written 4.3 years ago by Pierre Lindenbaum

cross posted https://stackoverflow.com/questions/71727681/

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written 4.3 years ago by Pierre Lindenbaum

1 answer

As noted elsewhere you should use a newer/current tool to simulate these reads. Besides ART (detailed here: How do I install MAQ software on Ubuntu? ) you can use randomreads.sh from BBMap suite (see paired-end reads in BBMap randomreads.sh )

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written 4.3 years ago by GenoMax