Cited by 321Advanced Proteomics Techniques and ApplicationsMass Spectrometry Techniques and ApplicationsMetabolomics and Mass Spectrometry Studies

Protein Contaminants Matter: Building Universal Protein Contaminant Libraries for DDA and DIA Proteomics

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Frankenfield, Ashley M., Ni, Jiawei, Ahmed, Mustafa, Hao, Ling·2022·Journal of Proteome Research

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Abstract

Mass spectrometry-based proteomics is constantly challenged by the presence of contaminant background signals. In particular, protein contaminants from reagents and sample handling are almost impossible to avoid. For data-dependent acquisition (DDA) proteomics, an exclusion list can be used to reduce the influence of protein contaminants. However, protein contamination has not been evaluated and is rarely addressed in data-independent acquisition (DIA). How protein contaminants influence proteomic data is also unclear. In this study, we established new protein contaminant FASTA and spectral libraries that are applicable to all proteomic workflows and evaluated the impact of protein contaminants on both DDA and DIA proteomics. We demonstrated that including our contaminant libraries can reduce false discoveries and increase protein identifications, without influencing the quantification accuracy in various proteomic software platforms. With the pressing need to standardize proteomic workflow in the research community, we highly recommend including our contaminant FASTA and spectral libraries in all bottom-up proteomic data analysis. Our contaminant libraries and a step-by-step tutorial to incorporate these libraries in various DDA and DIA data analysis platforms can be valuable resources for proteomic researchers, freely accessible at https://github.com/HaoGroup-ProtContLib.

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Authors
Frankenfield, A. M., Ni, J., Ahmed, M., & Hao, L.
Affiliations
George Washington University (US)
Corresponding author
Hao, Ling
Venue
Journal of Proteome Research
Published
2022-07-06
Volume
21
Issue
9
Pages
2104-2113
ISSN
  • 1535-3893 (ISSN-L)
  • 1535-3907
OpenAlex
W4284882692
Cited by
321
References
46
Citations by year
2026: 114 · 2025: 115 · 2024: 58 · 2023: 31 · 2022: 3
FWCI
19.59
Type
journal article
Language
en
Open access
Locations
  • Journal of Proteome Research (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Neurological Disorders and Stroke (R01NS121608)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Physical Sciences › Chemistry › Spectroscopy › Mass Spectrometry Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolomics and Mass Spectrometry Studies
Keywords
protein contaminants, data-dependent acquisition, data-independent acquisition, false discovery rate, protein identification, shotgun proteomics
MeSH terms
Software, Mass Spectrometry, Proteome, Proteomics

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