2002 Fiscal Year Final Research Report Summary
Post-genome analysis on proteolytic systems of multicellular organism
| Project/Area Number |
13680725
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional biochemistry
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| Research Institution | Tokyo University of Pharmacy and Life Science Grant-in Aid for Scientific Research ( C ) (2) |
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Principal Investigator |
INOUE Hideshi School of Life Science, Associate Professor, 生命科学部, 助教授 (20184765)
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| Project Period (FY) |
2001 – 2002
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| Keywords | C. elegans / protease / RNAi / proteolysis / RNAi |
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| Research Abstract |
C. elegans has over 300 genes that code for protease-like proteins. We carried out RNAi analysis on about 190 protease-like genes. Proteases essential for the life cycle of C. elegans were found to be as follows: proteasome, signal peptidase, Lon protease, a cathepsin L-like cysteine protease, a trypsin-like serine protease, some of the ubiquitin-specific proteases, mitochondria processing protease and so on. RNAi on these genes led to lethality. Most of the proteasome subunits except for Rpn9, Rpn10, and Rpn12 are essential. Simultaneous interference of Rpn10 and Rpn12 caused lethal effect. Additionally, we found a novel ADAMTS protease essential for morphogenesis. Two metalloproteases that have a CUB domain and a TSP-1 domain were required for molting. Six serine proteases homologous to dipeptidyl peptidase IV or acylaminoacyl peptidase were found to participate in migration of distal tip cells of gonad. In order to reveal the distribution of these proteases, we performed GFP-expression analysis, in situ hybridization, immunostaining, etc. Some of the proteases were enzymologically characterized using proteins prepared by heterologous expression system or purified from C. elegans
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Research Products
(4 results)
