Map between Entrez Gene Identifiers and Gene Symbols

Description

org.Dm.egSYMBOL is an R object that provides mappings between entrez gene identifiers and gene abbreviations.

Details

Each entrez gene identifier is mapped to the a common abbreviation for the corresponding gene. An NA is reported if there is no known abbreviation for a given gene.

Symbols typically consist of 3 letters that define either a single gene (ABC) or multiple genes (ABC1, ABC2, ABC3). Gene symbols can be used as key words to query public databases such as Entrez Gene.

Mappings were based on data provided by: Entrez Gene ftp://ftp.ncbi.nlm.nih.gov/gene/DATA With a date stamp from the source of: 2016-Mar14

References

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=gene

See Also

• AnnotationDb-class for use of the select() interface.

Examples

## select() interface:
## Objects in this package can be accessed using the select() interface
## from the AnnotationDbi package. See ?select for details.

## Bimap interface:
x <- org.Dm.egSYMBOL
# Get the gene symbol that are mapped to an entrez gene identifiers
mapped_genes <- mappedkeys(x)
# Convert to a list
xx <- as.list(x[mapped_genes])
if(length(xx) > 0) {
  # Get the SYMBOL for the first five genes
  xx[1:5]
  # Get the first one
  xx[[1]]
}
# For the reverse map:
x <- org.Dm.egSYMBOL2EG
# Get the entrez gene identifiers that are mapped to a gene symbol
mapped_genes <- mappedkeys(x)
# Convert to a list
xx <- as.list(x[mapped_genes])
if(length(xx) > 0) {
  # Get the entrez gene ID for the first five genes
  xx[1:5]
  # Get the first one
  xx[[1]]
}

Results

R version 3.3.1 (2016-06-21) -- "Bug in Your Hair"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> library(org.Dm.eg.db)
Loading required package: AnnotationDbi
Loading required package: stats4
Loading required package: BiocGenerics
Loading required package: parallel

Attaching package: 'BiocGenerics'

The following objects are masked from 'package:parallel':

    clusterApply, clusterApplyLB, clusterCall, clusterEvalQ,
    clusterExport, clusterMap, parApply, parCapply, parLapply,
    parLapplyLB, parRapply, parSapply, parSapplyLB

The following objects are masked from 'package:stats':

    IQR, mad, xtabs

The following objects are masked from 'package:base':

    Filter, Find, Map, Position, Reduce, anyDuplicated, append,
    as.data.frame, cbind, colnames, do.call, duplicated, eval, evalq,
    get, grep, grepl, intersect, is.unsorted, lapply, lengths, mapply,
    match, mget, order, paste, pmax, pmax.int, pmin, pmin.int, rank,
    rbind, rownames, sapply, setdiff, sort, table, tapply, union,
    unique, unsplit

Loading required package: Biobase
Welcome to Bioconductor

    Vignettes contain introductory material; view with
    'browseVignettes()'. To cite Bioconductor, see
    'citation("Biobase")', and for packages 'citation("pkgname")'.

Loading required package: IRanges
Loading required package: S4Vectors

Attaching package: 'S4Vectors'

The following objects are masked from 'package:base':

    colMeans, colSums, expand.grid, rowMeans, rowSums


> png(filename="/home/ddbj/snapshot/RGM3/R_BC/result/org.Dm.eg.db/org.Dm.egSYMBOL.Rd_%03d_medium.png", width=480, height=480)
> ### Name: org.Dm.egSYMBOL
> ### Title: Map between Entrez Gene Identifiers and Gene Symbols
> ### Aliases: org.Dm.egSYMBOL org.Dm.egSYMBOL2EG
> ### Keywords: datasets
> 
> ### ** Examples
> 
> ## select() interface:
> ## Objects in this package can be accessed using the select() interface
> ## from the AnnotationDbi package. See ?select for details.
> 
> ## Bimap interface:
> x <- org.Dm.egSYMBOL
> # Get the gene symbol that are mapped to an entrez gene identifiers
> mapped_genes <- mappedkeys(x)
> # Convert to a list
> xx <- as.list(x[mapped_genes])
> if(length(xx) > 0) {
+   # Get the SYMBOL for the first five genes
+   xx[1:5]
+   # Get the first one
+   xx[[1]]
+ }
[1] "CR42738"
> # For the reverse map:
> x <- org.Dm.egSYMBOL2EG
> # Get the entrez gene identifiers that are mapped to a gene symbol
> mapped_genes <- mappedkeys(x)
> # Convert to a list
> xx <- as.list(x[mapped_genes])
> if(length(xx) > 0) {
+   # Get the entrez gene ID for the first five genes
+   xx[1:5]
+   # Get the first one
+   xx[[1]]
+ }
[1] "30970"
> 
> 
> 
> 
> 
> dev.off()
null device 
          1 
>