readIonbotPeptides: Read Tabulated Files Exported by Ionbot At Peptide Level

In wrProteo: Proteomics Data Analysis Functions

Read Tabulated Files Exported by Ionbot At Peptide Level

Description

This function allows importing initial petide identification and quantification results from Ionbot which were exported as tabulated tsv can be imported and relevant information extracted. The final output is a list containing 3 main elements: $annot, $raw and optional $quant, or returns data.frame with entire content of file if separateAnnot=FALSE.

Usage

readIonbotPeptides(
  fileName,
  path = NULL,
  normalizeMeth = "median",
  sampleNames = NULL,
  gr = NULL,
  sdrf = NULL,
  read0asNA = TRUE,
  quantCol = "^Abundances*",
  annotCol = NULL,
  contamCol = "Contaminant",
  refLi = NULL,
  separateAnnot = TRUE,
  FDRCol = list(c("^Protein.FDR.Confidence", "High"), c("^Found.in.Sample.", "High")),
  plotGraph = TRUE,
  suplAnnotFile = TRUE,
  groupPref = list(lowNumberOfGroups = TRUE, chUnit = TRUE),
  titGraph = "Ionbot",
  wex = 1.6,
  specPref = c(conta = "CON_|LYSC_CHICK", mainSpecies = "OS=Homo sapiens"),
  silent = FALSE,
  debug = FALSE,
  callFrom = NULL
)

Arguments

fileName	(character) name of file to be read
path	(character) path of file to be read
normalizeMeth	(character) normalization method, defaults to median, for more details see /link[wrMisc]{normalizeThis}
sampleNames	(character) new column-names for quantification data (ProteomeDiscoverer does not automatically use file-names from spectra); this argument has priority over suplAnnotFile
gr	(character or factor) custom defined pattern of replicate association, will override final grouping of replicates from sdrf and/or suplAnnotFile (if provided)
sdrf	(character, list or data.frame) optional extraction and adding of experimenal meta-data: if character, this may be the ID at ProteomeExchange, the second & third elements may give futher indicatations for automatic organization of groups of replicates. Besides, the output from readSdrf or a list from defineSamples may be provided; if gr is provided, gr gets priority for grouping of replicates; if sdrfOrder=TRUE the output will be put in order of sdrf
read0asNA	(logical) decide if initial quntifications at 0 should be transformed to NA
quantCol	(character or integer) exact col-names, or if length=1 content of quantCol will be used as pattern to search among column-names for $quant using grep
annotCol	(character) column names to be read/extracted for the annotation section (default c("Accession","Description","Gene","Contaminant","Sum.PEP.Score","Coverage....","X..Peptides","X..PSMs","X..Unique.Peptides", "X..AAs","MW..kDa.") )
contamCol	(character or integer, length=1) which columns should be used for contaminants marked by ProteomeDiscoverer. If a column named contamCol is found, the data will be lateron filtered to remove all contaminants, set to NULL for keeping all contaminants
refLi	(character or integer) custom specify which line of data is main species, if character (eg 'mainSpe'), the column 'SpecType' in $annot will be searched for exact match of the (single) term given
separateAnnot	(logical) if TRUE output will be organized as list with $annot, $abund for initial/raw abundance values and $quant with final normalized quantitations
FDRCol	(list) optional indication to search for protein FDR information
plotGraph	(logical or integer) optional plot of type vioplot of initial and normalized data (using normalizeMeth); if integer, it will be passed to layout when plotting
suplAnnotFile	(logical or character) optional reading of supplemental files produced by ProteomeDiscoverer; however, if gr is provided, gr gets priority for grouping of replicates; if TRUE defaults to file '*InputFiles.txt' (needed to match information of sdrf) which can be exported next to main quantitation results; if character the respective file-name (relative or absolute path)
groupPref	(list) additional parameters for interpreting meta-data to identify structure of groups (replicates), will be passed to readSampleMetaData. May contain lowNumberOfGroups=FALSE for automatically choosing a rather elevated number of groups if possible (defaults to low number of groups, ie higher number of samples per group) May contain chUnit (logical or character) to be passed to readSampleMetaData() for (optional) adjustig of unit-prefixes in meta-data group labels, in case multiple different unit-prefixes are used (eg '100pMol' and '1nMol').
titGraph	(character) depreciated custom title to plot, please use 'tit'
wex	(integer) relative expansion factor of the violin-plot (will be passed to /link[wrGraph]{vioplotW})
specPref	(character or list) define characteristic text for recognizing (main) groups of species (1st for comtaminants - will be marked as 'conta', 2nd for main species- marked as 'mainSpe', and optional following ones for supplemental tags/species - maked as 'species2','species3',...); if list and list-element has multiple values they will be used for exact matching of accessions (ie 2nd of argument annotCol)
silent	(logical) suppress messages
debug	(logical) additional messages for debugging
callFrom	(character) allows easier tracking of messages produced

Details

Using the argument suplAnnotFile it is possible to specify a specific file (or search for default file) to read for extracting file-names as sample-names and other experiment realted information.

Value

This function returns a list with $raw (initial/raw abundance values), $quant with final normalized quantitations, $annot, $counts an array with number of peptides, $quantNotes and $notes; or if separateAnnot=FALSE the function returns a data.frame with annotation and quantitation only

See Also

/link[utils]{read.table}, /link{readMaxQuantFile}, /link{readProteomeDiscovererFile}, /link[wrMisc]{normalizeThis})

Examples

path1 <- system.file("extdata", package="wrProteo")
fiIonbot <- "tinyIonbotFile1.tsv.gz"
datIobPep <- readIonbotPeptides(fiIonbot, path=path1) 

wrProteo documentation built on April 12, 2025, 1:16 a.m.