1996年12月
The isoforms of proprotein convertase PC5 are sorted to different subcellular compartments
JOURNAL OF CELL BIOLOGY
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- 巻
- 135
- 号
- 5
- 開始ページ
- 1261
- 終了ページ
- 1275
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1083/jcb.135.5.1261
- 出版者・発行元
- ROCKEFELLER UNIV PRESS
The proprotein convertase PC5 is encoded by multiple mRNAs, two of which give rise to the COOH-terminal variant isoforms PC5-A (915 amino acids [aa]) and PCS-B (1877 aa). To investigate the differences in biosynthesis and sorting between these two proteins, we generated stably transfected AtT-20 cell lines expressing each enzyme individually and examined their respective processing pattern and subcellular localization. Biosynthetic analyses coupled to immunofluorescence studies demonstrated that the shorter and soluble PCS-A is sorted to regulated secretory granules. In contrast, the COOH-terminally extended and membrane-bound PCS-B is located in the Golgi. The presence of a sorting signal in the COOH-terminal 38 amino acids unique to PCS-A was demonstrated by the inefficient entry into the regulated secretory pathway of a mutant lacking this segment. EM of pancreatic cells established the presence of immunoreactive PC5 in glucagon-containing granules, demonstrating the sorting of this protein to dense core secretory granules in endocrine cells. Thus, a single PC5 gene generates COOH-terminally modified isoforms with different sorting signals directing these proteins to distinct subcellular localization, thereby allowing them to process their appropriate substrates.
- リンク情報
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- DOI
- https://doi.org/10.1083/jcb.135.5.1261
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:A1996VV78200007&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-0030443840&partnerID=MN8TOARS
- URL
- http://orcid.org/0000-0001-7701-7183
- ID情報
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- DOI : 10.1083/jcb.135.5.1261
- ISSN : 0021-9525
- ORCIDのPut Code : 44277940
- SCOPUS ID : 0030443840
- Web of Science ID : WOS:A1996VV78200007