Cited by 24Advanced Proteomics Techniques and ApplicationsMass Spectrometry Techniques and ApplicationsMetabolomics and Mass Spectrometry Studies

Top‐down protein identification of proteasome proteins with nanoLC‐FT‐ICR‐MS employing data‐independent fragmentation methods

Open access
Lakshmanan, Rajeswari, Wolff, Jeremy J., Alvarado, Rudy, Loo, Joseph A.·2014·PROTEOMICS

Abstract

A comparison of different data‐independent fragmentation methods combined with LC coupled to high‐resolution FT‐ICR‐MS/MS is presented for top‐down MS of protein mixtures. Proteins composing the 20S and 19S proteasome complexes and their PTMs were identified using a 15 T FT‐ICR mass spectrometer. The data‐independent fragmentation modes with LC timescales allowed for higher duty‐cycle measurements that better suit online LC‐FT‐ICR‐MS. Protein top‐down dissociation was effected by funnel‐skimmer collisionally activated dissociation (FS‐CAD) and CASI (continuous accumulation of selected ions)‐CAD. The N‐termini for 9 of the 14 20S proteasome proteins were found to be modified, and the α3 protein was found to be phosphorylated; these results are consistent with previous reports. Mass‐measurement accuracy with the LC‐FT‐ICR system for the 20‐ to 30‐kDa 20S proteasome proteins was 1 ppm. The intact mass of the 100‐kDa Rpn1 subunit from the 19S proteasome complex regulatory particle was measured with a deviation of 17 ppm. The CASI‐CAD technique is a complementary tool for intact‐protein fragmentation and is an effective addition to the growing inventory of dissociation methods that are compatible with online protein separation coupled to FT‐ICR‐MS.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1002/pmic.201300339

Cites

51 of 51 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Data-independent fragmentation in past top-down MS studies relied on in-source fragmentation of all intact proteoforms ionized simultaneously after LC elution, with no m/z filtering and limited possibility of obtaining precursor information.

    “those works relied on the in-source fragmentation of all intact proteoforms ionized simultaneously after LC elution, with no m/z filtering and limited possibility of obtaining precursor information.”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Lakshmanan, R., Wolff, J. J., Alvarado, R., & Loo, J. A.
Affiliations
  • University of California, Los Angeles (US)
  • Bruker (United States) (US)
Corresponding author
Loo, Joseph A.
Venue
PROTEOMICS
Publisher
Wiley
Published
2014-03-26
Volume
14
Issue
10
Pages
1271-1282
ISSN
  • 1615-9853 (ISSN-L)
  • 1615-9861
OpenAlex
W1997240024
Cited by
24
References
51
Citations by year
2024: 2 · 2023: 3 · 2022: 2 · 2020: 5 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 4 · 2015: 2 · 2014: 1
FWCI
1.29
Type
journal article
Language
en
Open access
Locations
  • PROTEOMICS (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
US National Institutes of Health (R01 GM103479, S10 RR023045, S10 RR028893)
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
top-down proteomics, proteasome, 20S proteasome, N-terminal modification, phosphorylation, RPN1, post-translational modification
MeSH terms
Chromatography, Liquid, Humans, Peptide Fragments, Spectrometry, Mass, Electrospray Ionization, Proteomics, Proteasome Endopeptidase Complex, Tandem Mass Spectrometry

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review