specL

The software tool "specL" addresses the need for targeted data extraction methods in proteomics experiments, particularly in the context of sequential window acquisition of all theoretical spectrum (SWATH) and data-independent acquisition (DIA) methods. These methods enhance reproducibility by omitting classical precursor selection, instead fragmenting all present precursors. However, precise MS coordinates (retention time, precursor, and fragment masses) are essential for targeted data extraction, usually obtained in a discovery experiment or from public spectral library repositories.
In response to this challenge, specL provides a versatile set of functions to generate assay panels from spectral libraries. These panels are crucial for ensuring the quality of the assay and facilitating downstream analysis. The software is implemented in the R language, released under an open-source license (GPL-3), and has been available in Bioconductor since version 3.0 (R-3.1). The package's vignette provides a comprehensive tutorial, including information on data import/export and analysis.