Proteomic dataset of non-specific interactors in Leishmania infantum

This dataset provides a proteomic resource of non-specific protein interactions in Leishmania infantum identified by affinity purification coupled to mass spectrometry (AP-MS/MS). Protein extracts from promastigotes expressing Cas9/T7 RNA polymerase were subjected to immunoprecipitation using HA, myc, and His affinity systems, followed by LC-MS/MS analysis. Raw spectral data were processed using MaxQuant against the L. infantum reference proteome from UniProtKB. The dataset includes raw mass spectrometry files, peptide and protein identification tables, and label-free quantification (LFQ) data, all publicly available via the ProteomeXchange Consortium under the identifier PXD067464. After data filtering, a total of 566 unique proteins were identified across all conditions, including 60 proteins consistently detected in all three affinity systems, representing putative non-specific binders. Among these, metabolism-related proteins (30%) and ribosomal components (28%) were the most abundant functional classes. This dataset provides a valuable reference for background protein binding in AP-MS/MS experiments in Leishmania, supporting improved interpretation of interactome studies and benchmarking of affinity purification strategies.