Site-specific expression and subcellular localization of a signal peptide peptidase in <I>Arabidopsis thaliana</I>
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- Tamura Tomoko
- Graduate School of Agricultural and Life sciences, U-of Tokyo
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- Asakura Tomiko
- 跡見女大・生活環境
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- Uemura Tomohiro
- 理研・中央研
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- Ueda Takashi
- 東大院理系・生物科学
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- Terauchi Kaede
- 広島工大・健康情報
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- Abe Keiko
- Graduate School of Agricultural and Life sciences, U-of Tokyo
Bibliographic Information
- Other Title
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- シロイヌナズナのシグナルペプチドペプチダーゼの組織特異的発現および細胞内局在
Abstract
Signal peptide peptidase (SPP) was identified as a homologue of presenilin, catalyzes intramembrane proteolysis of some signal peptides cleaved from a preprotein. Searching the Arabidopsis database, we found an orthologue of human SPP (AtSPP) and five homologues (AtSPPL1-AtSPPL5). In situ hybridization showed that AtSPPs were highly expressed in the shoot meristem and the epidermis of radicle during germination. At the reproductive stage in shoot apex, AtSPP was expressed in the inflorescence meristem, whearas the expression of homologues took place in the lower part of rib zone, where cell division is activated to form vascular bundle. Subcellular localization of AtSPPs were investigated by transporting a GFP fused protein in Deep cells. We detected GFP-AtSPP on the ER membrane and both GFP-AtSPPL2 and GFP-AtSPPL3 in the endosomes. These results suggest that AtSPP and AtSPPLs are functionally different from one another, having differential roles in plant physiology.
Journal
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- Plant and Cell Physiology Supplement
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Plant and Cell Physiology Supplement 2007 (0), 807-807, 2007
The Japanese Society of Plant Physiologists
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Details 詳細情報について
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- CRID
- 1390282680607347456
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- NII Article ID
- 130006991439
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- Data Source
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- JaLC
- CiNii Articles
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- Abstract License Flag
- Disallowed