Cited by 101Ubiquitin and proteasome pathwaysAdvanced Proteomics Techniques and ApplicationsHeat shock proteins research

A proteomics approach to identify the ubiquitinated proteins in mouse heart

Jeon, Hong Bae, Choi, Eun Soo, Yoon, Jong Hyuk, Hwang, Jin Ha, Chang, Jong Wook, Lee, Eun Kyung, Choi, Hyun Woo, Park, Zee-Yong +1 more·2007·Biochemical and Biophysical Research Communications

Abstract

There is a growing need for the large-scale identification of the ubiquitinated proteins and ubiquitin attachment sites. As part of this effort, we generated a transgenic mouse expressing a tagged ubiquitin in the heart. We found that the majority of ubiquitinated proteins in mouse heart are insoluble in detergent-free buffer and were chemically cleaved after methionine with CNBr. CNBr cleaved the proteins into smaller polypeptides while preserving the ubiquitin chains. Ubiquitin-conjugated polypeptides were then purified under denaturing conditions, digested with Lys-C and trypsin, and analyzed by liquid chromatography-tandem mass spectrometry. We identified 121 proteins that were ubiquitinated in mouse heart, and we detected 33 ubiquitination sites in 21 of the proteins. Components of cardiac muscle and many mitochondrial proteins were identified as substrates for ubiquitination, strongly suggesting that proteins related to major heart functions such as contraction and energy production are under continuous quality control by the ubiquitin system.

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Crossref · 10.1016/j.bbrc.2007.04.015

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Authors
Jeon, H. B., Choi, E. S., Yoon, J. H., Hwang, J. H., Chang, J. W., Lee, E. K., Choi, H. W., Park, Z.-Y., & Yoo, Y. J.
Affiliations
Gwangju Institute of Science and Technology (KR)
Corresponding author
Yoo, Yung Joon
Venue
Biochemical and Biophysical Research Communications
Publisher
Elsevier BV
Published
2007-06
Volume
357
Issue
3
Pages
731-736
ISSN
0006-291X (ISSN-L)
OpenAlex
W1990018583
Cited by
101
References
34
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 3 · 2020: 6 · 2019: 3 · 2018: 4 · 2017: 4 · 2016: 7 · 2015: 4 · 2014: 8 · 2013: 13 · 2012: 6
FWCI
3.04
Type
journal article
Language
en
Open access
closed
Locations
  • Biochemical and Biophysical Research Communications (publishedVersion)
  • PubMed (publishedVersion)
Funders
Ministerio de Ciencia y Tecnología
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
Keywords
ubiquitinated proteins, ubiquitination sites, mouse heart, CNBr cleavage, mitochondrial proteins, protein quality control, ubiquitin system
MeSH terms
Animals, Cyanogen Bromide, Electrophoresis, Polyacrylamide Gel, Mice, Transgenic, Myocardium, Proteins, Trypsin, Sequence Analysis, Protein, Ubiquitin, Proteomics, Mice, Tandem Mass Spectrometry

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