4 title: "Tutorial: GATK VariantFiltration"
8 h1. Tutorial: GATK VariantFiltration
10 Here you will use the GATK VariantFiltration program to assign pass/fail scores to variants in a VCF file.
12 _This should be motivated better using a specific biomedical research
13 or diagnostic question that involves this analysis_
15 _From conversation with Ward: We should link to a discussion of the
16 personal genome project and explain that it a freely available dataset
17 that any researcher can use, which makes it appropriate to be used in these examples._
21 * Log in to a VM "using SSH":ssh-access.html
22 * Put an "API token":api-tokens.html in your @ARVADOS_API_TOKEN@ environment variable
23 * Put the API host name in your @ARVADOS_API_HOST@ environment variable
25 If everything is set up correctly, the command @arv -h user current@ will display your account information.
27 h3. Get the GATK binary distribution.
29 _Perhaps separate out this and the next sections and link to it so the user only
30 has to do this if they really don't have GATK installed. Also provide
31 a way to determine if they do have it._
33 Download the GATK binary tarball[1] -- e.g., @GenomeAnalysisTK-2.6-4.tar.bz2@ -- and copy it to your Arvados VM.
35 _Is it necessary to copy it to the Arvados VM first, you could put it into
36 keep from your desktop and/or use the workbench? Also if we are
37 telling them to copy it to the VM, maybe we should mention scp?_
42 arv keep put --in-manifest GenomeAnalysisTK-2.6-4.tar.bz2
47 _Make the itty bitty down arrows bigger, and maybe center them_
50 c905c8d8443a9c44274d98b7c6cfaa32+94+K@qr1hi
53 h3. Get the GATK resource bundle.
55 This can take a while to download, and should already be available in Arvados. For now let's just list the files and sizes, to make sure we have the correct collection ID.
58 arv keep ls -s d237a90bae3870b3b033aea1e99de4a9+10820+K@qr1hi
64 50342 1000G_omni2.5.b37.vcf.gz
65 1 1000G_omni2.5.b37.vcf.gz.md5
66 464 1000G_omni2.5.b37.vcf.idx.gz
67 1 1000G_omni2.5.b37.vcf.idx.gz.md5
68 43981 1000G_phase1.indels.b37.vcf.gz
74 The Arvados distribution includes an example crunch script ("crunch_scripts/GATK2-VariantFiltration":https://arvados.org/projects/arvados/repository/revisions/master/entry/crunch_scripts/GATK2-VariantFiltration) that runs the GATK VariantFiltration tool with some default settings.
76 We will pass it the following parameters:
78 * input -- a collection containing the source VCF data. Here we will use an exome report from PGP participant hu34D5B9.
79 * gatk_binary_tarball -- a collection containing the GATK 2 tarball.
80 * gatk_bundle -- a collection containing the GATK resource bundle[2].
83 src_version=76588bfc57f33ea1b36b82ca7187f465b73b4ca4
84 vcf_input=5ee633fe2569d2a42dd81b07490d5d13+82+K@qr1hi
85 gatk_binary=c905c8d8443a9c44274d98b7c6cfaa32+94+K@qr1hi
86 gatk_bundle=d237a90bae3870b3b033aea1e99de4a9+10820+K@qr1hi
88 read -rd $'\000' the_job <<EOF
90 "script":"GATK2-VariantFiltration",
91 "script_version":"$src_version",
95 "gatk_binary_tarball":"$gatk_binary",
96 "gatk_bundle":"$gatk_bundle"
101 arv -h job create --job "$the_job"
104 Note the job UUID in the API response.
106 h3. Monitor job progress
108 _This was already covered in tutorial1_
110 There are three ways to monitor job progress:
112 # Go to Workbench, drop down the Compute menu, and click Jobs. The job you submitted should appear at the top of the list. Hit "Refresh" until it finishes.
113 # Run @arv -h job get --uuid JOB_UUID_HERE@ to see the job particulars, notably the "tasks_summary" attribute which indicates how many tasks are done/running/todo.
114 # Watch the crunch log messages and stderr from the job tasks:
117 curl -s -H "Authorization: OAuth2 $ARVADOS_API_TOKEN" \
118 https://{{ site.arvados_api_host }}/arvados/v1/jobs/JOB_UUID_HERE/log_tail_follow
122 _That's it? Say something about the output we're going to get_
126 fn1. Download the GATK tools → http://www.broadinstitute.org/gatk/download
128 fn2. Information about the GATK resource bundle → http://gatkforums.broadinstitute.org/discussion/1213/whats-in-the-resource-bundle-and-how-can-i-get-it