startCodons {ORFik}

R Documentation

Get the Start codons(3 bases) from a GRangesList of orfs grouped by orfs

Description

In ATGTTTTGA, get the positions ATG. It takes care of exons boundaries, with exons < 3 length.

Usage

startCodons(grl, is.sorted = FALSE)

Arguments

grl	a GRangesList object
is.sorted	a boolean, a speedup if you know the ranges are sorted

Value

a GRangesList of start codons, since they might be split on exons

See Also

Other ORFHelpers: defineTrailer(), longestORFs(), mapToGRanges(), orfID(), startSites(), stopCodons(), stopSites(), txNames(), uniqueGroups(), uniqueOrder()

Examples

gr_plus <- GRanges(seqnames = "chr1",
                   ranges = IRanges(c(7, 14), width = 3),
                   strand = "+")
gr_minus <- GRanges(seqnames = "chr2",
                    ranges = IRanges(c(4, 1), c(9, 3)),
                    strand = "-")
grl <- GRangesList(tx1 = gr_plus, tx2 = gr_minus)
startCodons(grl, is.sorted = FALSE)

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