Cited by 106Advanced Proteomics Techniques and ApplicationsMass Spectrometry Techniques and ApplicationsMetabolomics and Mass Spectrometry Studies

Systematic optimization of long gradient chromatography mass spectrometry for deep analysis of brain proteome

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Wang, Hong, Yang, Yanling, Li, Yuxin, Bai, Bing, Wang, Xusheng, Tan, Haiyan, Liu, Tao, Beach, Thomas G. +2 more·2015·Journal of Proteome Research

Abstract

The development of high-resolution liquid chromatography (LC) is essential for improving the sensitivity and throughput of mass spectrometry (MS)-based proteomics. Here we present systematic optimization of a long gradient LC-MS/MS platform to enhance protein identification from a complex mixture. The platform employed an in-house fabricated, reverse-phase long column (100 μm × 150 cm, 5 μm C18 beads) coupled to Q Exactive MS. The column was capable of achieving a peak capacity of ∼700 in a 720 min gradient of 10-45% acetonitrile. The optimal loading level was ∼6 μg of peptides, although the column allowed loading as many as 20 μg. Gas-phase fractionation of peptide ions further increased the number of peptide identification by ∼10%. Moreover, the combination of basic pH LC prefractionation with the long gradient LC-MS/MS platform enabled the identification of 96,127 peptides and 10,544 proteins at 1% protein false discovery rate in a post-mortem brain sample of Alzheimer's disease. Because deep RNA sequencing of the same specimen suggested that ∼16,000 genes were expressed, the current analysis covered more than 60% of the expressed proteome. Further improvement strategies of the LC/LC-MS/MS platform were also discussed.

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  • The acquisition of rich proteomic information is largely attributed to access to high quality AD brain tissue and the strength of the optimized MS-based proteomics platform.

    “The acquisition of such rich proteomic information is largely attributed to the access to high quality AD brain tissue (Beach et al., 2015) and the strength of the optimized mass spectrometry-based proteomics platform, including multiplex TMT isobaric labeling (Niu et al., 2017), extensive long gradient LC/LC coupled with high resolution MS/MS analysis (Wang et al., 2015), a refined phosphopeptide”

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Authors
Wang, H., Yang, Y., Li, Y., Bai, B., Wang, X., Tan, H., Liu, T., Beach, T. G., Peng, J., & Wu, Z.
Affiliations
  • University of Tennessee Health Science Center (US)
  • St. Jude Children's Research Hospital (US)
  • Pacific Northwest National Laboratory (US)
  • Banner Sun Health Research Institute (US)
Corresponding author
  • Peng, Junmin
  • Wu, Zhiping
Venue
Journal of Proteome Research
Published
2014-12-12
Volume
14
Issue
2
Pages
829-838
ISSN
  • 1535-3893 (ISSN-L)
  • 1535-3907
OpenAlex
W2037114174
Cited by
96
References
50
Citations by year
2026: 3 · 2025: 12 · 2024: 8 · 2023: 7 · 2022: 10 · 2021: 15 · 2020: 8 · 2019: 8 · 2018: 7 · 2017: 11 · 2016: 4 · 2015: 2
FWCI
2.43
Type
journal article
Language
en
Open access
Locations
  • Journal of Proteome Research (publishedVersion, other-oa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of Neurological Disorders and Stroke (R21NS081571, U24NS072026)
  • Michael J. Fox Foundation for Parkinson's Research
  • National Institute on Aging (P30AG19610, R21AG039764)
  • American Lebanese Syrian Associated Charities
  • Arizona Biomedical Research Commission, Arizona Department of Health Services (0011, 05-901, 1001, 4001)
  • Arizona Department of Health Services (211002)
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
brain proteome, peak capacity, gas-phase fractionation, postmortem brain, Alzheimer's disease, protein identification, peptide identification
MeSH terms
Alzheimer Disease, Animals, Brain, Brain Chemistry, Chromatography, Liquid, Humans, Proteome, Proteomics, Rats, Tandem Mass Spectrometry

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