Canu-Teaching

Category

Bioinformatics

Program On

Teaching

Version

1.5

Author / Distributor

canu

Description

"Canu is a fork of the Celera Assembler, designed for high-noise single-molecule sequencing (such as the PacBio RS II or Oxford Nanopore MinION). Canu is a hierarchical assembly pipeline which runs in four steps: Detect overlaps in high-noise sequences using MHAP Generate corrected sequence consensus Trim corrected sequences Assemble trimmed corrected sequences" More details are at canu

Running Program

The last version of this application is at /usr/local/apps/eb/canu/1.5-foss-2016b

To use this version, please loads the module with

ml canu/1.5-foss-2016b 

Here is an example of a shell script, sub.sh, to run on at the batch queue:

#!/bin/bash
#SBATCH --job-name=j_canu
#SBATCH --partition=batch
#SBATCH --mail-type=ALL
#SBATCH --mail-user=username@uga.edu
#SBATCH --ntasks=1
#SBATCH --mem=10gb
#SBATCH --time=08:00:00
#SBATCH --output=canu.%j.out

cd $SLURM_SUBMIT_DIR
ml canu/1.5-foss-2016b
canu [options]

In the real submission script, at least all the above underlined values need to be reviewed or to be replaced by the proper values.

Please refer to Running_Jobs_on_the_teaching_cluster, Run X window Jobs and Run interactive Jobs for more details of running jobs at Teaching cluster.

Here is an example of job submission command:

sbatch ./sub.sh 

Documentation

ml canu/1.5-foss-2016b 
canu canu -h

usage: canu [-version] \
            [-correct | -trim | -assemble | -trim-assemble] \
            [-s <assembly-specifications-file>] \
             -p <assembly-prefix> \
             -d <assembly-directory> \
             genomeSize=<number>[g|m|k] \
            [other-options] \
            [-pacbio-raw | -pacbio-corrected | -nanopore-raw | -nanopore-corrected] *fastq

  By default, all three stages (correct, trim, assemble) are computed.
  To compute only a single stage, use:
    -correct       - generate corrected reads
    -trim          - generate trimmed reads
    -assemble      - generate an assembly
    -trim-assemble - generate trimmed reads and then assemble them

  The assembly is computed in the (created) -d <assembly-directory>, with most
  files named using the -p <assembly-prefix>.

  The genome size is your best guess of the genome size of what is being assembled.
  It is used mostly to compute coverage in reads.  Fractional values are allowed: '4.7m'
  is the same as '4700k' and '4700000'

  A full list of options can be printed with '-options'.  All options
  can be supplied in an optional sepc file.

  Reads can be either FASTA or FASTQ format, uncompressed, or compressed
  with gz, bz2 or xz.  Reads are specified by the technology they were
  generated with:
    -pacbio-raw         <files>
    -pacbio-corrected   <files>
    -nanopore-raw       <files>
    -nanopore-corrected <files>

Complete documentation at http://canu.readthedocs.org/en/latest/

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Installation

Source code is obtained from canu

System

64-bit Linux