Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon
Conserved homologues of the Hrd1 ubiquitin ligase target for degradation proteins that persistently or aberrantly engage the endoplasmic reticulum translocon, including mammalian apolipoprotein B (apoB; the major protein component of low-density lipoproteins) and the artificial yeast protein Deg1-Se...
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| Format: | Article |
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PeerJ Inc.
2017-08-01
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| Series: | PeerJ |
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| Online Access: | https://peerj.com/articles/3728.pdf |
| _version_ | 1797425518728970240 |
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| author | Sarah M. Engle Justin J. Crowder Sheldon G. Watts Christopher J. Indovina Samuel Z. Coffey Eric M. Rubenstein |
| author_facet | Sarah M. Engle Justin J. Crowder Sheldon G. Watts Christopher J. Indovina Samuel Z. Coffey Eric M. Rubenstein |
| author_sort | Sarah M. Engle |
| collection | DOAJ |
| description | Conserved homologues of the Hrd1 ubiquitin ligase target for degradation proteins that persistently or aberrantly engage the endoplasmic reticulum translocon, including mammalian apolipoprotein B (apoB; the major protein component of low-density lipoproteins) and the artificial yeast protein Deg1-Sec62. A complete understanding of the molecular mechanism by which translocon-associated proteins are recognized and degraded may inform the development of therapeutic strategies for cholesterol-related pathologies. Both apoB and Deg1-Sec62 are extensively post-translationally modified. Mass spectrometry of a variant of Deg1-Sec62 revealed that the protein is acetylated at the N-terminal methionine and two internal lysine residues. N-terminal and internal acetylation regulates the degradation of a variety of unstable proteins. However, preventing N-terminal and internal acetylation had no detectable consequence for Hrd1-mediated proteolysis of Deg1-Sec62. Our data highlight the importance of empirically validating the role of post-translational modifications and sequence motifs on protein degradation, even when such elements have previously been demonstrated sufficient to destine other proteins for destruction. |
| first_indexed | 2024-03-09T08:17:16Z |
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| id | doaj.art-0fbaeb96e4674b609866b23971a649aa |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T08:17:16Z |
| publishDate | 2017-08-01 |
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| series | PeerJ |
| spelling | doaj.art-0fbaeb96e4674b609866b23971a649aa2023-12-02T22:00:46ZengPeerJ Inc.PeerJ2167-83592017-08-015e372810.7717/peerj.3728Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum transloconSarah M. Engle0Justin J. Crowder1Sheldon G. Watts2Christopher J. Indovina3Samuel Z. Coffey4Eric M. Rubenstein5Department of Biology, Ball State University, Muncie, IN, United States of AmericaDepartment of Biology, Ball State University, Muncie, IN, United States of AmericaDepartment of Biology, Ball State University, Muncie, IN, United States of AmericaDepartment of Biology, Ball State University, Muncie, IN, United States of AmericaDepartment of Biology, Ball State University, Muncie, IN, United States of AmericaDepartment of Biology, Ball State University, Muncie, IN, United States of AmericaConserved homologues of the Hrd1 ubiquitin ligase target for degradation proteins that persistently or aberrantly engage the endoplasmic reticulum translocon, including mammalian apolipoprotein B (apoB; the major protein component of low-density lipoproteins) and the artificial yeast protein Deg1-Sec62. A complete understanding of the molecular mechanism by which translocon-associated proteins are recognized and degraded may inform the development of therapeutic strategies for cholesterol-related pathologies. Both apoB and Deg1-Sec62 are extensively post-translationally modified. Mass spectrometry of a variant of Deg1-Sec62 revealed that the protein is acetylated at the N-terminal methionine and two internal lysine residues. N-terminal and internal acetylation regulates the degradation of a variety of unstable proteins. However, preventing N-terminal and internal acetylation had no detectable consequence for Hrd1-mediated proteolysis of Deg1-Sec62. Our data highlight the importance of empirically validating the role of post-translational modifications and sequence motifs on protein degradation, even when such elements have previously been demonstrated sufficient to destine other proteins for destruction.https://peerj.com/articles/3728.pdfAcetylationApolipoprotein BNat3TransloconProtein quality controlProtein degradation |
| spellingShingle | Sarah M. Engle Justin J. Crowder Sheldon G. Watts Christopher J. Indovina Samuel Z. Coffey Eric M. Rubenstein Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon PeerJ Acetylation Apolipoprotein B Nat3 Translocon Protein quality control Protein degradation |
| title | Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon |
| title_full | Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon |
| title_fullStr | Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon |
| title_full_unstemmed | Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon |
| title_short | Acetylation of N-terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon |
| title_sort | acetylation of n terminus and two internal amino acids is dispensable for degradation of a protein that aberrantly engages the endoplasmic reticulum translocon |
| topic | Acetylation Apolipoprotein B Nat3 Translocon Protein quality control Protein degradation |
| url | https://peerj.com/articles/3728.pdf |
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