User:Timothee Flutre/Notebook/Postdoc/2012/02/01: Difference between revisions
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To view the description of the format, go to the [http://genome.ucsc.edu/cgi-bin/hgTables?command=start UCSC Table Browser]. Then choose the relevant parameters, in our case: clade="Mammal", genome="Human", assembly="hg19", group="Genes and Gene Prediction Tracks", track="Ensembl Genes" and table="ensGene". Finally, click on "describe table schema". | To view the description of the format, go to the [http://genome.ucsc.edu/cgi-bin/hgTables?command=start UCSC Table Browser]. Then choose the relevant parameters, in our case: clade="Mammal", genome="Human", assembly="hg19", group="Genes and Gene Prediction Tracks", track="Ensembl Genes" and table="ensGene". Finally, click on "describe table schema". | ||
* convert transcripts | * convert transcripts into the [http://genome.ucsc.edu/FAQ/FAQformat.html#format1 BED format], and then gather coordinates at the gene level (TSS and TES): | ||
zcat Ensembl_hg19_UCSC_20111019.txt.gz | awk '{print $3"\t"$5"\t"$6"\t"$13"|"$2}' | gzip > Ensembl_transcripts.bed.gz | zcat Ensembl_hg19_UCSC_20111019.txt.gz | awk '{print $3"\t"$5"\t"$6"\t"$13"|"$2}' | gzip > Ensembl_transcripts.bed.gz | ||
transcripts2genes.py Ensembl_hg19_UCSC_20111019.txt.gz Ensembl_genes.bed.gz | transcripts2genes.py Ensembl_hg19_UCSC_20111019.txt.gz Ensembl_genes.bed.gz | ||
* identify SNPs in cis of each gene (500kb in 5' of TSS and 3' of TES) assuming the SNP coordinates are taken from a file in the [http://www.stats.ox.ac.uk/~marchini/software/gwas/file_format.html IMPUTE format]: | * identify SNPs in cis of each gene (500kb in 5' of TSS and 3' of TES) assuming the SNP coordinates are taken from a file in the [http://www.stats.ox.ac.uk/~marchini/software/gwas/file_format.html IMPUTE format] and we have [http://code.google.com/p/bedtools/ BEDTools] installed: | ||
for i in {1..22}; do echo "chr"${i}"..."; awk -v i=${i} -F" " '{print "chr"i"\t"$3-1"\t"$3"\t"$2}' /path/to/chr${i}.impute | \ | for i in {1..22}; do echo "chr"${i}"..."; awk -v i=${i} -F" " '{print "chr"i"\t"$3-1"\t"$3"\t"$2}' /path/to/chr${i}.impute | \ |
Revision as of 05:03, 11 April 2012
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Find SNPs in cis of genes
wget -O Ensembl_hg19_UCSC_20111019.txt.gz ftp://hgdownload.cse.ucsc.edu/goldenPath/hg19/database/ensGene.txt.gz To view the description of the format, go to the UCSC Table Browser. Then choose the relevant parameters, in our case: clade="Mammal", genome="Human", assembly="hg19", group="Genes and Gene Prediction Tracks", track="Ensembl Genes" and table="ensGene". Finally, click on "describe table schema".
zcat Ensembl_hg19_UCSC_20111019.txt.gz | awk '{print $3"\t"$5"\t"$6"\t"$13"|"$2}' | gzip > Ensembl_transcripts.bed.gz transcripts2genes.py Ensembl_hg19_UCSC_20111019.txt.gz Ensembl_genes.bed.gz
for i in {1..22}; do echo "chr"${i}"..."; awk -v i=${i} -F" " '{print "chr"i"\t"$3-1"\t"$3"\t"$2}' /path/to/chr${i}.impute | \ windowBed -w 500000 -a Ensembl_genes.bed.gz -b stdin | \ awk '{print $4"\t"$9"|"$8}' | \ gzip > chr${i}_genes_cisSNPs.txt.gz; done |