The study on the multi-molecular reaction mechanism of transamidosome for Gln-tRNA(Gln) synthesis
| Project/Area Number |
21370041
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural biochemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
YAO Min 北海道大学, 大学院・先端生命科学研究院, 教授 (40311518)
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| Co-Investigator(Renkei-kenkyūsha) |
TANAKA Isao 北海道大学, 大学院・先端生命科学研究院, 特任教授 (70093052)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2010: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2009: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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| Keywords | X 線結晶解析 / 多段階反応の協調 / トランスアミドソーム / GatCAB / tRNA / GluRS / AspRS / 多分子協調機構 / X線結晶解析 |
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| Research Abstract |
In order to elucidate the multi-molecular reaction mechanism of transamidosome in the indirect synthetic pathway of aminoacyl tRNA (Gln-tRNA^Gln, Asn-tRNA^Asn), we over-expressed, purified 6 components of 2 transamidosomes from S. aureus and P. aeruginosa, respectively, and formed 2 transamidosomes in vitro. We succeeded in the structural analysis of Asn-tRNA^Asn transamidosomes of P.aeruginosa. The structure of Asn-tRNA^Asn transamidosomes consisted of tRNA^Asn, ND-AspRS and GatCAB with a rate of 2:2:2, according with the result of the biochemistry experiment. The structure shown that acceptor stem of tRNA^Asn was located in the active site of ND-AspRS, representing a tRNA-binding situation before aminoacylation (mischarge) of the tRNA^Asn. After the aminoacylation, the acceptor stem of tRNAAsn flipped toward the active site of GatCAB for transamidation.
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Report
(4 results)
Research Products
(24 results)
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[Journal Article] Structure of bacterial cellulose synthase subunit D octamer with four inner passageways2010
Author(s)
Hu S-Q, Gao Y-G, Tajima K, Sunagawa N, Zhou Y, Kawano S, Fujiwara T, Yoda T, Shimura D, Satoh Y, Munekata M, Tanaka I, Yao M
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Journal Title
Proc. Natl. Acad. Sci. USA
Volume: 107
Issue: 42
Pages: 17957-17961
DOI
NAID
Related Report
Peer Reviewed
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