Hrd1-dependent Degradation of the Unassembled PIGK Subunit of the GPI Transamidase Complex
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- Kawaguchi Kohei
- Department of Life Science, Rikkyo University
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- Yamamoto-Hino Miki
- Department of Life Science, Rikkyo University
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- Murakami Yoshiko
- Research Institute for Microbial Diseases, Osaka University
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- Kinoshita Taroh
- Research Institute for Microbial Diseases, Osaka University
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- Goto Satoshi
- Department of Life Science, Rikkyo University
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Abstract
<p>Glycosylphosphatidylinositol (GPI)-anchored proteins are post-transcriptionally modified with GPI and anchored to the plasma membrane. GPI is attached to nascent proteins in the endoplasmic reticulum by the GPI transamidase complex, which consists of PIGT, PIGK, GPAA1, PIGU, and PIGS. Of these, PIGK is a catalytic subunit that is unstable without PIGT. This study investigated the pathway by which unassembled PIGK not incorporated into the complex is degraded. We showed that unassembled PIGK was degraded via the proteasome-dependent pathway and that Hrd1 (also known as SYVN1), a ubiquitin ligase involved in the endoplasmic reticulum-associated degradation pathway, was responsible for degradation of unassembled PIGK.</p><p>Key words: Glycosylphosphatidylinositol, GPI transamidase complex, protein stability, transamidation, ERAD</p>
Journal
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- Cell Structure and Function
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Cell Structure and Function 46 (2), 65-71, 2021
Japan Society for Cell Biology
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Keywords
Details 詳細情報について
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- CRID
- 1390289254683567872
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- NII Article ID
- 130008083701
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- NII Book ID
- AA0060007X
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- ISSN
- 13473700
- 03867196
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- NDL BIB ID
- 032032610
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- PubMed
- 34193731
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed