Package: AnnotationHub
Authors: Martin Morgan [cre], Marc Carlson [ctb], Dan Tenenbaum [ctb], Sonali Arora [ctb]
Modified: Sun Jun 28 10:41:23 2015
Compiled: Thu Mar 10 20:45:50 2016
Bioconductor offers pre-built org.* annotation packages for model organisms, with their use described in the OrgDb section of the Annotation work flow. Here we discover available OrgDb objects (more than 1000!) for less-model organisms
library(AnnotationHub)
ah <- AnnotationHub()## snapshotDate(): 2016-03-09query(ah, "OrgDb")## AnnotationHub with 1019 records
## # snapshotDate(): 2016-03-09
## # $dataprovider: ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/
## # $species: Escherichia coli, Acanthamoeba castellanii_str._Neff, Acanthisitta chloris, Acetobac...
## # $rdataclass: OrgDb
## # additional mcols(): taxonomyid, genome, description, tags, sourceurl, sourcetype
## # retrieve records with, e.g., 'object[["AH48006"]]'
##
## title
## AH48006 | org.Camelina_sativa.eg.sqlite
## AH48007 | org.Glycine_max.eg.sqlite
## AH48008 | org.Malus_domestica.eg.sqlite
## AH48009 | org.Zea_mays.eg.sqlite
## AH48010 | org.Brassica_rapa.eg.sqlite
## ... ...
## AH49587 | org.Ce.eg.db.sqlite
## AH49588 | org.Xl.eg.db.sqlite
## AH49589 | org.Sc.sgd.db.sqlite
## AH49590 | org.Dr.eg.db.sqlite
## AH49591 | org.Pf.plasmo.db.sqlitequery(ah, c("OrgDb", "Takifugu"))## AnnotationHub with 1 record
## # snapshotDate(): 2016-03-09
## # names(): AH48147
## # $dataprovider: ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/
## # $species: Takifugu rubripes
## # $rdataclass: OrgDb
## # $title: org.Takifugu_rubripes.eg.sqlite
## # $description: NCBI gene ID based annotations about Takifugu_rubripes
## # $taxonomyid: 31033
## # $genome: NCBI genomes
## # $sourcetype: NCBI/UniProt
## # $sourceurl: ftp://ftp.ncbi.nlm.nih.gov/gene/DATA/, ftp://ftp.uniprot.org/pub/databases/uniprot...
## # $sourcelastmodifieddate: NA
## # $sourcesize: NA
## # $tags: NCBI, Gene, Annotation
## # retrieve record with 'object[["AH48147"]]'takifugu <- ah[["AH48147"]]## loading from cache '/home/biocbuild/.AnnotationHub/54453'The object returned by AnnotationHub is directly usable with the select() interface, e.g., to discover the available keytypes for querying the object, the columns that these keytypes can map to, and finally selecting the SYMBOL and GENENAME corresponding to the first 6 ENTREZIDs
keytypes(takifugu)## [1] "ACCNUM" "ALIAS" "ENSEMBL" "ENTREZID" "EVIDENCE" "EVIDENCEALL"
## [7] "GENENAME" "GID" "GO" "GOALL" "ONTOLOGY" "ONTOLOGYALL"
## [13] "PMID" "REFSEQ" "SYMBOL" "UNIGENE"columns(takifugu)## [1] "ACCNUM" "ALIAS" "CHR" "ENSEMBL" "ENTREZID" "EVIDENCE"
## [7] "EVIDENCEALL" "GENENAME" "GID" "GO" "GOALL" "ONTOLOGY"
## [13] "ONTOLOGYALL" "PMID" "REFSEQ" "SYMBOL" "UNIGENE"egid <- head(keys(takifugu, "ENTREZID"))
select(takifugu, egid, c("SYMBOL", "GENENAME"), "ENTREZID")## 'select()' returned 1:1 mapping between keys and columns## ENTREZID SYMBOL GENENAME
## 1 100036576 get4 golgi to ER traffic protein 4 homolog (S. cerevisiae)
## 2 100037832 LOC100037832 alpha-2,6-sialyltransferase
## 3 100037833 tas1r1 taste receptor, type 1, member 1
## 4 100049068 tfip11 tuftelin interacting protein 11
## 5 100049069 pparg peroxisome proliferator-activated receptor gamma
## 6 100049070 ppard peroxisome proliferator-activated receptor deltaAll Roadmap Epigenomics files are hosted here. If one had to download these files on their own, one would navigate through the web interface to find useful files, then use something like the following R code.
url <- "http://egg2.wustl.edu/roadmap/data/byFileType/peaks/consolidated/broadPeak/E001-H3K4me1.broadPeak.gz"
filename <- basename(url)
download.file(url, destfile=filename)
if (file.exists(filename))
data <- import(filename, format="bed")This would have to be repeated for all files, and the onus would lie on the user to identify, download, import, and manage the local disk location of these files.
AnnotationHub reduces this task to just a few lines of R code
library(AnnotationHub)
ah = AnnotationHub()## snapshotDate(): 2016-03-09epiFiles <- query(ah, "EpigenomeRoadMap")A look at the value returned by epiFiles shows us that 18248 roadmap resources are available via AnnotationHub. Additional information about the files is also available, e.g., where the files came from (dataprovider), genome, species, sourceurl, sourcetypes.
epiFiles## AnnotationHub with 18248 records
## # snapshotDate(): 2016-03-09
## # $dataprovider: BroadInstitute
## # $species: Homo sapiens
## # $rdataclass: BigWigFile, GRanges, data.frame
## # additional mcols(): taxonomyid, genome, description, tags, sourceurl, sourcetype
## # retrieve records with, e.g., 'object[["AH28856"]]'
##
## title
## AH28856 | E001-H3K4me1.broadPeak.gz
## AH28857 | E001-H3K4me3.broadPeak.gz
## AH28858 | E001-H3K9ac.broadPeak.gz
## AH28859 | E001-H3K9me3.broadPeak.gz
## AH28860 | E001-H3K27me3.broadPeak.gz
## ... ...
## AH49540 | E058_mCRF_FractionalMethylation.bigwig
## AH49541 | E059_mCRF_FractionalMethylation.bigwig
## AH49542 | E061_mCRF_FractionalMethylation.bigwig
## AH49543 | E081_mCRF_FractionalMethylation.bigwig
## AH49544 | E082_mCRF_FractionalMethylation.bigwigA good sanity check to ensure that we have files only from the Roadmap Epigenomics project is to check that all the files in the returned smaller hub object come from Homo sapiens and the hg19 genome
unique(epiFiles$species)## [1] "Homo sapiens"unique(epiFiles$genome)## [1] "hg19"Broadly, one can get an idea of the different files from this project looking at the sourcetype
table(epiFiles$sourcetype)##
## BED BigWig GTF Zip tab
## 8298 9932 3 14 1To get a more descriptive idea of these different files one can use:
sort(table(epiFiles$description), decreasing=TRUE)##
## Bigwig File containing -log10(p-value) signal tracks from EpigenomeRoadMap Project
## 6881
## Bigwig File containing fold enrichment signal tracks from EpigenomeRoadMap Project
## 2947
## Narrow ChIP-seq peaks for consolidated epigenomes from EpigenomeRoadMap Project
## 2894
## Broad ChIP-seq peaks for consolidated epigenomes from EpigenomeRoadMap Project
## 2534
## Gapped ChIP-seq peaks for consolidated epigenomes from EpigenomeRoadMap Project
## 2534
## Narrow DNasePeaks for consolidated epigenomes from EpigenomeRoadMap Project
## 131
## 15 state chromatin segmentations from EpigenomeRoadMap Project
## 127
## Broad domains on enrichment for DNase-seq for consolidated epigenomes from EpigenomeRoadMap Project
## 78
## RRBS fractional methylation calls from EpigenomeRoadMap Project
## 51
## Whole genome bisulphite fractional methylation calls from EpigenomeRoadMap Project
## 37
## MeDIP/MRE(mCRF) fractional methylation calls from EpigenomeRoadMap Project
## 16
## GencodeV10 gene/transcript coordinates and annotations corresponding to hg19 version of the human genome
## 3
## RNA-seq read count matrix for intronic protein-coding RNA elements
## 2
## RNA-seq read counts matrix for ribosomal gene exons
## 2
## RPKM expression matrix for ribosomal gene exons
## 2
## Metadata for EpigenomeRoadMap Project
## 1
## RNA-seq read counts matrix for non-coding RNAs
## 1
## RNA-seq read counts matrix for protein coding exons
## 1
## RNA-seq read counts matrix for protein coding genes
## 1
## RNA-seq read counts matrix for ribosomal genes
## 1
## RPKM expression matrix for non-coding RNAs
## 1
## RPKM expression matrix for protein coding exons
## 1
## RPKM expression matrix for protein coding genes
## 1
## RPKM expression matrix for ribosomal RNAs
## 1The ‘metadata’ provided by the Roadmap Epigenomics Project is also available. Note that the information displayed about a hub with a single resource is quite different from the information displayed when the hub references more than one resource.
metadata.tab <- query(ah , c("EpigenomeRoadMap", "Metadata"))
metadata.tab## AnnotationHub with 1 record
## # snapshotDate(): 2016-03-09
## # names(): AH41830
## # $dataprovider: BroadInstitute
## # $species: Homo sapiens
## # $rdataclass: data.frame
## # $title: EID_metadata.tab
## # $description: Metadata for EpigenomeRoadMap Project
## # $taxonomyid: 9606
## # $genome: hg19
## # $sourcetype: tab
## # $sourceurl: http://egg2.wustl.edu/roadmap/data/byFileType/metadata/EID_metadata.tab
## # $sourcelastmodifieddate: 2015-02-15
## # $sourcesize: 18035
## # $tags: EpigenomeRoadMap, Metadata
## # retrieve record with 'object[["AH41830"]]'So far we have been exploring information about resources, without downloading the resource to a local cache and importing it into R. One can retrieve the resource using [[ as indicated at the end of the show method
## loading from cache '/home/biocbuild/.AnnotationHub/47270'metadata.tab <- ah[["AH41830"]]## loading from cache '/home/biocbuild/.AnnotationHub/47270'The metadata.tab file is returned as a data.frame. The first 6 rows of the first 5 columns are shown here:
metadata.tab[1:6, 1:5]## EID GROUP COLOR MNEMONIC STD_NAME
## 1 E001 ESC #924965 ESC.I3 ES-I3 Cells
## 2 E002 ESC #924965 ESC.WA7 ES-WA7 Cells
## 3 E003 ESC #924965 ESC.H1 H1 Cells
## 4 E004 ES-deriv #4178AE ESDR.H1.BMP4.MESO H1 BMP4 Derived Mesendoderm Cultured Cells
## 5 E005 ES-deriv #4178AE ESDR.H1.BMP4.TROP H1 BMP4 Derived Trophoblast Cultured Cells
## 6 E006 ES-deriv #4178AE ESDR.H1.MSC H1 Derived Mesenchymal Stem CellsOne can keep constructing different queries using multiple arguments to trim down these 18248 to get the files one wants. For example, to get the ChIP-Seq files for consolidated epigenomes, one could use
bpChipEpi <- query(ah , c("EpigenomeRoadMap", "broadPeak", "chip", "consolidated"))To get all the bigWig signal files, one can query the hub using
allBigWigFiles <- query(ah, c("EpigenomeRoadMap", "BigWig"))To access the 15 state chromatin segmentations, one can use
seg <- query(ah, c("EpigenomeRoadMap", "segmentations"))If one is interested in getting all the files related to one sample
E126 <- query(ah , c("EpigenomeRoadMap", "E126", "H3K4ME2"))
E126## AnnotationHub with 6 records
## # snapshotDate(): 2016-03-09
## # $dataprovider: BroadInstitute
## # $species: Homo sapiens
## # $rdataclass: BigWigFile, GRanges
## # additional mcols(): taxonomyid, genome, description, tags, sourceurl, sourcetype
## # retrieve records with, e.g., 'object[["AH29817"]]'
##
## title
## AH29817 | E126-H3K4me2.broadPeak.gz
## AH30868 | E126-H3K4me2.narrowPeak.gz
## AH31801 | E126-H3K4me2.gappedPeak.gz
## AH32990 | E126-H3K4me2.fc.signal.bigwig
## AH34022 | E126-H3K4me2.pval.signal.bigwig
## AH40177 | E126-H3K4me2.imputed.pval.signal.bigwigHub resources can also be selected using $, subset(), and display(); see the main AnnotationHub vignette for additional detail.
Hub resources are imported as the appropriate Bioconductor object for use in further analysis. For example, peak files are returned as GRanges objects.
## require("rtracklayer")## loading from cache '/home/biocbuild/.AnnotationHub/35257'peaks <- E126[['AH29817']]## loading from cache '/home/biocbuild/.AnnotationHub/35257'seqinfo(peaks)## Seqinfo object with 93 sequences (1 circular) from hg19 genome:
## seqnames seqlengths isCircular genome
## chr1 249250621 FALSE hg19
## chr2 243199373 FALSE hg19
## chr3 198022430 FALSE hg19
## chr4 191154276 FALSE hg19
## chr5 180915260 FALSE hg19
## ... ... ... ...
## chrUn_gl000245 36651 FALSE hg19
## chrUn_gl000246 38154 FALSE hg19
## chrUn_gl000247 36422 FALSE hg19
## chrUn_gl000248 39786 FALSE hg19
## chrUn_gl000249 38502 FALSE hg19BigWig files are returned as BigWigFile objects. A BigWigFile is a reference to a file on disk; the data in the file can be read in using rtracklayer::import(), perhaps querying these large files for particular genomic regions of interest as described on the help page ?import.bw.
Each record inside AnnotationHub is associated with a unique identifier. Most GRanges objects returned by AnnotationHub contain the unique AnnotationHub identifier of the resource from which the GRanges is derived. This can come handy when working with the GRanges object for a while, and additional information about the object (e.g., the name of the file in the cache, or the original sourceurl for the data underlying the resource) that is being worked with.
metadata(peaks)## $AnnotationHubName
## [1] "AH29817"
##
## $`File Name`
## [1] "E126-H3K4me2.broadPeak.gz"
##
## $`Data Source`
## [1] "http://egg2.wustl.edu/roadmap/data/byFileType/peaks/consolidated/broadPeak/E126-H3K4me2.broadPeak.gz"
##
## $Provider
## [1] "BroadInstitute"
##
## $Organism
## [1] "Homo sapiens"
##
## $`Taxonomy ID`
## [1] 9606ah[metadata(peaks)$AnnotationHubName]$sourceurl## [1] "http://egg2.wustl.edu/roadmap/data/byFileType/peaks/consolidated/broadPeak/E126-H3K4me2.broadPeak.gz"Bioconductor represents gene models using ‘transcript’ databases. These are available via packages such as TxDb.Hsapiens.UCSC.hg38.knownGene or can be constructed using functions such as GenomicFeatures::makeTxDbFromBiomart().
AnnotationHub provides an easy way to work with gene models published by Ensembl. Let’s see what Ensembl’s Release-80 has in terms of data for pufferfish, Takifugu rubripes.
query(ah, c("Takifugu", "release-80"))## AnnotationHub with 7 records
## # snapshotDate(): 2016-03-09
## # $dataprovider: Ensembl
## # $species: Takifugu rubripes
## # $rdataclass: FaFile, GRanges
## # additional mcols(): taxonomyid, genome, description, tags, sourceurl, sourcetype
## # retrieve records with, e.g., 'object[["AH47101"]]'
##
## title
## AH47101 | Takifugu_rubripes.FUGU4.80.gtf
## AH47475 | Takifugu_rubripes.FUGU4.cdna.all.fa
## AH47476 | Takifugu_rubripes.FUGU4.dna_rm.toplevel.fa
## AH47477 | Takifugu_rubripes.FUGU4.dna_sm.toplevel.fa
## AH47478 | Takifugu_rubripes.FUGU4.dna.toplevel.fa
## AH47479 | Takifugu_rubripes.FUGU4.ncrna.fa
## AH47480 | Takifugu_rubripes.FUGU4.pep.all.faWe see that there is a GTF file descrbing gene models, as well as various DNA sequences. Let’s retrieve the GTF and top-level DNA sequence files. The GTF file is imported as a GRanges instance, the DNA sequence as a compressed, indexed Fasta file
gtf <- ah[["AH47101"]]## loading from cache '/home/biocbuild/.AnnotationHub/52579'## using guess work to populate seqinfodna <- ah[["AH47477"]]## loading from cache '/home/biocbuild/.AnnotationHub/53323'
## '/home/biocbuild/.AnnotationHub/53324'head(gtf, 3)## GRanges object with 3 ranges and 19 metadata columns:
## seqnames ranges strand | source type score phase gene_id
## <Rle> <IRanges> <Rle> | <factor> <factor> <numeric> <integer> <character>
## [1] scaffold_1 [10422, 11354] - | ensembl gene <NA> <NA> ENSTRUG00000003702
## [2] scaffold_1 [10422, 11354] - | ensembl transcript <NA> <NA> ENSTRUG00000003702
## [3] scaffold_1 [10422, 11354] - | ensembl exon <NA> <NA> ENSTRUG00000003702
## gene_version gene_source gene_biotype transcript_id transcript_version
## <numeric> <character> <character> <character> <numeric>
## [1] 1 ensembl protein_coding <NA> <NA>
## [2] 1 ensembl protein_coding ENSTRUT00000008740 1
## [3] 1 ensembl protein_coding ENSTRUT00000008740 1
## transcript_source transcript_biotype exon_number exon_id exon_version protein_id
## <character> <character> <numeric> <character> <numeric> <character>
## [1] <NA> <NA> <NA> <NA> <NA> <NA>
## [2] ensembl protein_coding <NA> <NA> <NA> <NA>
## [3] ensembl protein_coding 1 ENSTRUE00000055472 1 <NA>
## protein_version gene_name transcript_name
## <numeric> <character> <character>
## [1] <NA> <NA> <NA>
## [2] <NA> <NA> <NA>
## [3] <NA> <NA> <NA>
## -------
## seqinfo: 2056 sequences (1 circular) from FUGU4 genome; no seqlengthsdna## class: FaFile
## path: /home/biocbuild/.AnnotationHub/53323
## index: /home/biocbuild/.AnnotationHub/53324
## isOpen: FALSE
## yieldSize: NAhead(seqlevels(dna))## [1] "scaffold_1" "scaffold_2" "scaffold_3" "scaffold_4" "scaffold_5" "scaffold_6"Let’s identify the 25 longest DNA sequences, and keep just the annotations on these scaffolds.
keep <- names(tail(sort(seqlengths(dna)), 25))
gtf_subset <- gtf[seqnames(gtf) %in% keep]It is trivial to make a TxDb instance of this subset (or of the entire gtf)
library(GenomicFeatures) # for makeTxDbFromGRanges
txdb <- makeTxDbFromGRanges(gtf_subset)and to use that in conjunction with the DNA sequences, e.g., to find exon sequences of all annotated genes.
library(Rsamtools) # for getSeq,FaFile-method
exons <- exons(txdb)
length(exons)## [1] 66219getSeq(dna, exons)## A DNAStringSet instance of length 66219
## width seq names
## [1] 72 ATGGCCTATCAGTTGTACAGGAATACCACTC...CCTGCAGGAGAGTCTGGACGAGCTTATCCAG scaffold_1
## [2] 105 ACTCAGCAGATCACCCCTCAGCTGGCTCTCC...TAATCGTGTCCGCAACCGTGTGAACTTCAGG scaffold_1
## [3] 156 GGTTCTCTCAACACCTACCGGTTCTGTGACA...GAGCGAATCCATGCAAAACAAACTGGATAAA scaffold_1
## [4] 88 CAAACCAATCTCCTCGCTGTCTCTTCTCGTT...CATCAGCCAGAGGGACGGATCATCTCAGGTT scaffold_1
## [5] 271 AGACGAGATGAGTGAGGACGCATTCAACGCC...AACACAGTGTGGAGACTTCAGAGGACGCCAC scaffold_1
## ... ... ...
## [66215] 67 ACGACTGGATGACAACATCAGGACCGTGGTA...TCAGACCAATGTGGGTCAGGATGGCAGACAG scaffold_9
## [66216] 50 TCTTTGGCTAATATTGACGATGTGGTAAACAAGATTCGTCTGAAGATTCG scaffold_9
## [66217] 81 GTATTTCCCAGCCAAGACCCGCTGGACAGGG...ATACATCAACACACTGTTTCCCACCGAGCAG scaffold_9
## [66218] 87 ATGATGGAGGATGAAGAATTTGAATTTGCGG...GACCCCAGAGGTGCAGCTAGCAATTGAACAG scaffold_9
## [66219] 213 GACGACATCCTCGTGTGGGGCCGCTCTAGGG...GACAGCTGCTGTTCGCCTGTTTCCCCCCCCC scaffold_9There is a one-to-one mapping between the genomic ranges contained in exons and the DNA sequences returned by getSeq().
Some difficulties arise when working with this partly assembled genome that require more advanced GenomicRanges skills, see the GenomicRanges vignettes, especially “GenomicRanges HOWTOs” and “An Introduction to GenomicRanges”.
Suppose we wanted to lift features from one genome build to another, e.g., because annotations were generated for hg19 but our experimental analysis used hg18. We know that UCSC provides ‘liftover’ files for mapping between genome builds.
In this example, we will take our broad Peak GRanges from E126 which comes from the ‘hg19’ genome, and lift over these features to their ‘hg38’ coordinates.
chainfiles <- query(ah , c("hg38", "hg19", "chainfile"))
chainfiles## AnnotationHub with 2 records
## # snapshotDate(): 2016-03-09
## # $dataprovider: UCSC
## # $species: Homo sapiens
## # $rdataclass: ChainFile
## # additional mcols(): taxonomyid, genome, description, tags, sourceurl, sourcetype
## # retrieve records with, e.g., 'object[["AH14108"]]'
##
## title
## AH14108 | hg38ToHg19.over.chain.gz
## AH14150 | hg19ToHg38.over.chain.gzWe are interested in the file that lifts over features from hg19 to hg38 so lets download that using
## loading from cache '/home/biocbuild/.AnnotationHub/18245'chain <- chainfiles[['AH14150']]## loading from cache '/home/biocbuild/.AnnotationHub/18245'chain## Chain of length 25
## names(25): chr1 chr2 chr3 chr4 chr5 chr6 chr7 chr8 ... chr18 chr19 chr20 chr21 chr22 chrX chrY chrMPerform the liftOver operation using rtracklayer::liftOver():
library(rtracklayer)
gr38 <- liftOver(peaks, chain)This returns a GRangeslist; update the genome of the result to get the final result
genome(gr38) <- "hg38"
gr38## GRangesList object of length 153266:
## [[1]]
## GRanges object with 1 range and 6 metadata columns:
## seqnames ranges strand | name score signalValue pValue qValue
## <Rle> <IRanges> <Rle> | <character> <numeric> <numeric> <numeric> <numeric>
## [1] chr1 [28667912, 28670147] * | Rank_1 189 <NA> 10.55845 22.01316
## peak
## <numeric>
## [1] 18.99911
##
## [[2]]
## GRanges object with 1 range and 6 metadata columns:
## seqnames ranges strand | name score signalValue pValue qValue peak
## [1] chr4 [54090990, 54092984] * | Rank_2 188 <NA> 8.11483 21.80441 18.80662
##
## [[3]]
## GRanges object with 1 range and 6 metadata columns:
## seqnames ranges strand | name score signalValue pValue qValue peak
## [1] chr14 [75293392, 75296621] * | Rank_3 180 <NA> 8.89834 20.97714 18.02816
##
## ...
## <153263 more elements>
## -------
## seqinfo: 23 sequences from hg38 genome; no seqlengthsOne may also be interested in working with common germline variants with evidence of medical interest. This information is available at NCBI.
Query the dbDNP files in the hub:
This returns a VcfFile which can be read in using r Biocpkg("VariantAnnotation"); because VCF files can be large, readVcf() supports several strategies for importing only relevant parts of the file (e.g., particular genomic locations, particular features of the variants), see ?readVcf for additional information.
variants <- readVcf(vcf, genome="hg19")
variants## class: CollapsedVCF
## dim: 111138 0
## rowRanges(vcf):
## GRanges with 5 metadata columns: paramRangeID, REF, ALT, QUAL, FILTER
## info(vcf):
## DataFrame with 58 columns: RS, RSPOS, RV, VP, GENEINFO, dbSNPBuildID, SAO, SSR, WGT, VC, PM, T...
## info(header(vcf)):
## Number Type Description
## RS 1 Integer dbSNP ID (i.e. rs number)
## RSPOS 1 Integer Chr position reported in dbSNP
## RV 0 Flag RS orientation is reversed
## VP 1 String Variation Property. Documentation is at ftp://ftp.ncbi.nlm.nih.g...
## GENEINFO 1 String Pairs each of gene symbol:gene id. The gene symbol and id are de...
## dbSNPBuildID 1 Integer First dbSNP Build for RS
## SAO 1 Integer Variant Allele Origin: 0 - unspecified, 1 - Germline, 2 - Somatic...
## SSR 1 Integer Variant Suspect Reason Codes (may be more than one value added to...
## WGT 1 Integer Weight, 00 - unmapped, 1 - weight 1, 2 - weight 2, 3 - weight 3 o...
## VC 1 String Variation Class
## PM 0 Flag Variant is Precious(Clinical,Pubmed Cited)
## TPA 0 Flag Provisional Third Party Annotation(TPA) (currently rs from PHARMG...
## PMC 0 Flag Links exist to PubMed Central article
## S3D 0 Flag Has 3D structure - SNP3D table
## SLO 0 Flag Has SubmitterLinkOut - From SNP->SubSNP->Batch.link_out
## NSF 0 Flag Has non-synonymous frameshift A coding region variation where one...
## NSM 0 Flag Has non-synonymous missense A coding region variation where one a...
## NSN 0 Flag Has non-synonymous nonsense A coding region variation where one a...
## REF 0 Flag Has reference A coding region variation where one allele in the s...
## SYN 0 Flag Has synonymous A coding region variation where one allele in the ...
## U3 0 Flag In 3' UTR Location is in an untranslated region (UTR). FxnCode = 53
## U5 0 Flag In 5' UTR Location is in an untranslated region (UTR). FxnCode = 55
## ASS 0 Flag In acceptor splice site FxnCode = 73
## DSS 0 Flag In donor splice-site FxnCode = 75
## INT 0 Flag In Intron FxnCode = 6
## R3 0 Flag In 3' gene region FxnCode = 13
## R5 0 Flag In 5' gene region FxnCode = 15
## OTH 0 Flag Has other variant with exactly the same set of mapped positions o...
## CFL 0 Flag Has Assembly conflict. This is for weight 1 and 2 variant that ma...
## ASP 0 Flag Is Assembly specific. This is set if the variant only maps to one...
## MUT 0 Flag Is mutation (journal citation, explicit fact): a low frequency va...
## VLD 0 Flag Is Validated. This bit is set if the variant has 2+ minor allele...
## G5A 0 Flag >5% minor allele frequency in each and all populations
## G5 0 Flag >5% minor allele frequency in 1+ populations
## HD 0 Flag Marker is on high density genotyping kit (50K density or greater)...
## GNO 0 Flag Genotypes available. The variant has individual genotype (in SubI...
## KGPhase1 0 Flag 1000 Genome phase 1 (incl. June Interim phase 1)
## KGPhase3 0 Flag 1000 Genome phase 3
## CDA 0 Flag Variation is interrogated in a clinical diagnostic assay
## LSD 0 Flag Submitted from a locus-specific database
## MTP 0 Flag Microattribution/third-party annotation(TPA:GWAS,PAGE)
## OM 0 Flag Has OMIM/OMIA
## NOC 0 Flag Contig allele not present in variant allele list. The reference s...
## WTD 0 Flag Is Withdrawn by submitter If one member ss is withdrawn by submit...
## NOV 0 Flag Rs cluster has non-overlapping allele sets. True when rs set has ...
## CAF . String An ordered, comma delimited list of allele frequencies based on 1...
## COMMON 1 Integer RS is a common SNP. A common SNP is one that has at least one 10...
## CLNHGVS . String Variant names from HGVS. The order of these variants correspon...
## CLNALLE . Integer Variant alleles from REF or ALT columns. 0 is REF, 1 is the firs...
## CLNSRC . String Variant Clinical Chanels
## CLNORIGIN . String Allele Origin. One or more of the following values may be added: ...
## CLNSRCID . String Variant Clinical Channel IDs
## CLNSIG . String Variant Clinical Significance, 0 - Uncertain significance, 1 - no...
## CLNDSDB . String Variant disease database name
## CLNDSDBID . String Variant disease database ID
## CLNDBN . String Variant disease name
## CLNREVSTAT . String no_assertion - No assertion provided, no_criteria - No assertion ...
## CLNACC . String Variant Accession and Versions
## geno(vcf):
## SimpleList of length 0:rowRanges() returns information from the CHROM, POS and ID fields of the VCF file, represented as a GRanges instance
rowRanges(variants)## GRanges object with 111138 ranges and 5 metadata columns:
## seqnames ranges strand | paramRangeID REF ALT
## <Rle> <IRanges> <Rle> | <factor> <DNAStringSet> <DNAStringSetList>
## rs786201005 1 [1014143, 1014143] * | <NA> C T
## rs672601345 1 [1014316, 1014316] * | <NA> C CG
## rs672601312 1 [1014359, 1014359] * | <NA> G T
## rs115173026 1 [1020217, 1020217] * | <NA> G T
## rs201073369 1 [1020239, 1020239] * | <NA> G C
## ... ... ... ... ... ... ... ...
## rs527236200 MT [15943, 15943] * | <NA> T C
## rs118203890 MT [15950, 15950] * | <NA> G A
## rs199474700 MT [15965, 15965] * | <NA> A G
## rs199474701 MT [15967, 15967] * | <NA> G A
## rs199474699 MT [15990, 15990] * | <NA> C T
## QUAL FILTER
## <numeric> <character>
## rs786201005 <NA> .
## rs672601345 <NA> .
## rs672601312 <NA> .
## rs115173026 <NA> .
## rs201073369 <NA> .
## ... ... ...
## rs527236200 <NA> .
## rs118203890 <NA> .
## rs199474700 <NA> .
## rs199474701 <NA> .
## rs199474699 <NA> .
## -------
## seqinfo: 25 sequences from hg19 genome; no seqlengthsNote that the broadPeaks files follow the UCSC chromosome naming convention, and the vcf data follows the NCBI style of chromosome naming convention. To bring these ranges in the same chromosome naming convention (ie UCSC), we would use
seqlevelsStyle(variants) <-seqlevelsStyle(peaks)And then finally to find which variants overlap these broadPeaks we would use:
overlap <- findOverlaps(variants, peaks)
overlap## Hits object with 10904 hits and 0 metadata columns:
## queryHits subjectHits
## <integer> <integer>
## [1] 35 20333
## [2] 36 20333
## [3] 37 20333
## [4] 38 20333
## [5] 41 7733
## ... ... ...
## [10900] 110761 21565
## [10901] 110762 21565
## [10902] 110763 21565
## [10903] 110764 21565
## [10904] 110765 21565
## -------
## queryLength: 111138
## subjectLength: 153266Some insight into how these results can be interpretted comes from looking a particular peak, e.g., the 3852nd peak
idx <- subjectHits(overlap) == 3852
overlap[idx]## Hits object with 39 hits and 0 metadata columns:
## queryHits subjectHits
## <integer> <integer>
## [1] 102896 3852
## [2] 102897 3852
## [3] 102898 3852
## [4] 102899 3852
## [5] 102900 3852
## ... ... ...
## [35] 102930 3852
## [36] 102931 3852
## [37] 102932 3852
## [38] 102933 3852
## [39] 102934 3852
## -------
## queryLength: 111138
## subjectLength: 153266There are three variants overlapping this peak; the coordinates of the peak and the overlapping variants are
peaks[3852]## GRanges object with 1 range and 6 metadata columns:
## seqnames ranges strand | name score signalValue pValue qValue
## <Rle> <IRanges> <Rle> | <character> <numeric> <numeric> <numeric> <numeric>
## [1] chr22 [50622494, 50626143] * | Rank_3852 79 <NA> 6.06768 10.18943
## peak
## <numeric>
## [1] 7.99818
## -------
## seqinfo: 93 sequences (1 circular) from hg19 genomerowRanges(variants)[queryHits(overlap[idx])]## GRanges object with 39 ranges and 5 metadata columns:
## seqnames ranges strand | paramRangeID REF
## <Rle> <IRanges> <Rle> | <factor> <DNAStringSet>
## rs6151429 chr22 [50625049, 50625049] * | <NA> T
## rs6151428 chr22 [50625182, 50625182] * | <NA> C
## rs774153480 chr22 [50625182, 50625182] * | <NA> C
## rs199476388 chr22 [50625204, 50625204] * | <NA> A
## rs74315482 chr22 [50625213, 50625213] * | <NA> G
## ... ... ... ... ... ... ...
## rs199476369 chr22 [50625936, 50625936] * | <NA> C
## rs2071421 chr22 [50625988, 50625988] * | <NA> T
## rs74315475 chr22 [50626033, 50626033] * | <NA> T
## rs398123419 chr22 [50626052, 50626052] * | <NA> C
## rs398123418 chr22 [50626057, 50626057] * | <NA> G
## ALT QUAL FILTER
## <DNAStringSetList> <numeric> <character>
## rs6151429 C <NA> .
## rs6151428 A,T <NA> .
## rs774153480 CG,CGGGG <NA> .
## rs199476388 C,G <NA> .
## rs74315482 A <NA> .
## ... ... ... ...
## rs199476369 G <NA> .
## rs2071421 C <NA> .
## rs74315475 A <NA> .
## rs398123419 A <NA> .
## rs398123418 A <NA> .
## -------
## seqinfo: 25 sequences from hg19 genome; no seqlengthssessionInfo()## R version 3.2.4 (2016-03-10)
## Platform: x86_64-pc-linux-gnu (64-bit)
## Running under: Ubuntu 14.04.4 LTS
##
## locale:
## [1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C LC_TIME=en_US.UTF-8
## [4] LC_COLLATE=C LC_MONETARY=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8
## [7] LC_PAPER=en_US.UTF-8 LC_NAME=C LC_ADDRESS=C
## [10] LC_TELEPHONE=C LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
##
## attached base packages:
## [1] stats4 parallel stats graphics grDevices utils datasets methods base
##
## other attached packages:
## [1] BSgenome.Hsapiens.UCSC.hg19_1.4.0 BSgenome_1.38.0
## [3] rtracklayer_1.30.2 VariantAnnotation_1.16.4
## [5] SummarizedExperiment_1.0.2 Rsamtools_1.22.0
## [7] Biostrings_2.38.4 XVector_0.10.0
## [9] GenomicFeatures_1.22.13 AnnotationDbi_1.32.3
## [11] Biobase_2.30.0 GenomicRanges_1.22.4
## [13] GenomeInfoDb_1.6.3 IRanges_2.4.8
## [15] S4Vectors_0.8.11 AnnotationHub_2.2.5
## [17] BiocGenerics_0.16.1 BiocStyle_1.8.0
##
## loaded via a namespace (and not attached):
## [1] Rcpp_0.12.3 futile.logger_1.4.1 BiocInstaller_1.20.1
## [4] formatR_1.3 futile.options_1.0.0 bitops_1.0-6
## [7] tools_3.2.4 zlibbioc_1.16.0 biomaRt_2.26.1
## [10] digest_0.6.9 evaluate_0.8.3 RSQLite_1.0.0
## [13] shiny_0.13.1 DBI_0.3.1 curl_0.9.6
## [16] yaml_2.1.13 httr_1.1.0 stringr_1.0.0
## [19] knitr_1.12.3 R6_2.1.2 BiocParallel_1.4.3
## [22] XML_3.98-1.4 rmarkdown_0.9.5 lambda.r_1.1.7
## [25] magrittr_1.5 GenomicAlignments_1.6.3 htmltools_0.3
## [28] mime_0.4 interactiveDisplayBase_1.8.0 xtable_1.8-2
## [31] httpuv_1.3.3 stringi_1.0-1 RCurl_1.95-4.8