Cited by 446Mass Spectrometry Techniques and ApplicationsAdvanced Proteomics Techniques and ApplicationsMetabolomics and Mass Spectrometry Studies

Structural characterization of protein tryptic peptides via liquid chromatography/mass spectrometry and collision-induced dissociation of their doubly charged molecular ions

Covey, Thomas R., Huang, Eric C., Henion, Jack D.·1991·Analytical Chemistry

Abstract

The formation of multiply charged molecular ions via the field-assisted ion evaporation mechanism during electrospray ionization enables the use of an atmospheric pressure ionization quadrupole mass spectrometer system for characterizing biologically important peptides. The straightforward implementation of high-performance liquid chromatography (HPLC) into this new strategy to determine the molecular weight of tryptic peptides via the pneumatically assisted electrospray (ion spray) interface is presented. Examples utilizing both microbore (1.0 mm) and standard bore (4.6 mm) inside diameter columns are shown for the LC/MS molecular weight determination of tryptic peptides in methionyl-human growth hormone (met-hGH). Injected levels from 50 to 75 pmol of tryptic digest onto 1 mm i.d. HPLC columns provided full-scan LC/MS or LC/MS/MS results without postcolumn splitting of the effluent. When standard 4.6 mm i.d. HPLC columns were used, a 20:1 postcolumn split was utilized, which required from 1 to 5 nmol of injected tryptic digest for full-scan LC/MS or LC/MS/MS results. Collision-induced dissociation (CID) mass spectra resulting from either "infusion" or on-line LC/MS/MS analysis of the abundant doubly charged ions that predominate for tryptic peptides under electrospray conditions provided structurally useful sequence information for met-hGH and human hemoglobin tryptic digests. The slower mass spectrometer scan rate used during infusion of sample provides more accurate mass assignments than on-line LC/MS or LC/MS/MS, but the latter on-line experiments preclude ambiguities caused by matrix or component interferences. However, in some instances very weak CID product ions preclude complete tryptic peptide structural characterization based upon the CID data alone.(ABSTRACT TRUNCATED AT 250 WORDS)

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Crossref · 10.1021/ac00013a003

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Authors
Covey, T. R., Huang, E. C., & Henion, J. D.
Venue
Analytical Chemistry
Published
1991-07-01
Volume
63
Issue
13
Pages
1193-1200
ISSN
  • 0003-2700 (ISSN-L)
  • 1520-6882
OpenAlex
W1988287443
Cited by
446
References
43
Citations by year
2025: 2 · 2023: 3 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 4 · 2017: 2 · 2016: 6 · 2015: 5 · 2014: 5 · 2013: 9 · 2012: 7
FWCI
24.13
Type
journal article
Language
en
Open access
closed
Locations
  • Analytical Chemistry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Chemistry › Spectroscopy › Mass Spectrometry Techniques and Applications
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolomics and Mass Spectrometry Studies
Keywords
tryptic peptides, collision-induced dissociation, electrospray ionization, molecular weight determination, human hemoglobin, peptide structural characterization
MeSH terms
Amino Acid Sequence, Chromatography, Liquid, Hemoglobins, Molecular Sequence Data, Peptide Fragments, Growth Hormone, Mass Spectrometry, Trypsin, Human Growth Hormone

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