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Updated: Apr 26, 2026
Detection of Protein Ubiquitination Sites by Peptide Enrichment and Mass Spectrometry
Published on: March 23, 2020
sapFinder: an R/Bioconductor package for detection of variant peptides in shotgun proteomics experiments
Bo Wen1, Shaohang Xu1, Gloria M Sheynkman1
1BGI-Shenzhen, Shenzhen 518083, China, Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA, Department of Biology, University of Copenhagen, Copenhagen DK-2200, Denmark, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China, Princess Al Jawhara Albrahim Center of Excellence in the Research of Hereditary Disorders, King Abdulaziz University, Jeddah 21589, Saudi Arabia and Macau University of Science and Technology, Taipa, Macau 999078, China.
Unlabelled:
Single nucleotide variations (SNVs) located within a reading frame can result in single amino acid polymorphisms (SAPs), leading to alteration of the corresponding amino acid sequence as well as function of a protein. Accurate detection of SAPs is an important issue in proteomic analysis at the experimental and bioinformatic level. Herein, we present sapFinder, an R software package, for detection of the variant peptides based on tandem mass spectrometry (MS/MS)-based proteomics data. This package automates the construction of variation-associated databases from public SNV repositories or sample-specific next-generation sequencing (NGS) data and the identification of SAPs through database searching, post-processing and generation of HTML-based report with visualized interface.
Availability And Implementation:
sapFinder is implemented as a Bioconductor package in R. The package and the vignette can be downloaded at http://bioconductor.org/packages/devel/bioc/html/sapFinder.html and are provided under a GPL-2 license.
