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  1. 010 学術雑誌論文
  2. 渡辺, 正勝 / WATANABE, Masakatsu

Photoactivated Adenylyl Cyclase Controls Phototaxis in the Flagellate Euglena gracilis

https://ir.soken.ac.jp/records/3925
https://ir.soken.ac.jp/records/3925
2a1f653f-3d9c-4803-94a9-711e47615f15
名前 / ファイル ライセンス アクション
1517.full.pdf 1517.full (163.3 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2013-08-26
タイトル
タイトル Photoactivated Adenylyl Cyclase Controls Phototaxis in the Flagellate Euglena gracilis
タイトル
タイトル Photoactivated Adenylyl Cyclase Controls Phototaxis in the Flagellate Euglena gracilis
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
著者 NTEFIDOU, Maria

× NTEFIDOU, Maria

NTEFIDOU, Maria

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ISEKI, Mineo

× ISEKI, Mineo

ISEKI, Mineo

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WATANABE, Masakatsu

× WATANABE, Masakatsu

WATANABE, Masakatsu

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LEBERT, Michael

× LEBERT, Michael

LEBERT, Michael

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HäDER, Donat-Peter

× HäDER, Donat-Peter

HäDER, Donat-Peter

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著者別名 渡辺, 正勝

× 渡辺, 正勝

渡辺, 正勝

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抄録
内容記述タイプ Abstract
内容記述 Euglena gracilis, a unicellular freshwater protist exhibits different photomovement responses, such as phototaxis (oriented movement toward or away from the light source) and photophobic (abrupt turn in response to a rapid increase [step-up] or decrease [step-down] in the light fluence rate) responses. Photoactivated adenylyl cyclase (PAC) has been isolated from whole-cell preparations and identified by RNA interference (RNA) to be the photoreceptor for step-up photophobic responses but not for step-down photophobic responses (M. Iseki, S, Matsunaga, A. Murakami, K. Ohno, K. Shiga, C. Yoshida, M. Sugai, T. Takahashi, T. Hori, M. Watanabe [2002] Nature 415: 1047-1051). The present study shows that knockdown of PAC by RNAi also effectively suppresses both positive and negative phototaxis, indicating for the first time that PAC or a PAC homolog is also the photoreceptor for photoorientation of wild-type E. gracilis. Recovery from RNAi occurred earlier for step-up photophobic responses than for positive and negative phototaxis. In addition, we investigated several phototaxis mutant strains of E. gracilis with different cytological features regarding the stigma and paraxonemal body (PAB; believed to be the location for the phototaxis photoreceptor) as well as Astasia longa, a close relative of E. gracilis. All of the E. gracilis mutant strains had PAC mRNAs, whereas in A. longa, a different but similar mRNA was found and designated AlPAC. Consistently, all of these strains showed no photo taxis but performed step-up photophobic responses, which were suppressed by RNAi of the PAC mRNA. The fact that some of these strains possess a cytologically altered or no PAB demonstrates that at least in these strains, the PAC photoreceptor responsible for the step-up photophobic responses is not located in the PAB.
書誌情報 Plant Physiology
en : Plant Physiology

巻 133, 号 4, p. 1517-1521, 発行日 2003-12
出版者
出版者 American Society of Plant Biologists
ISSN
収録物識別子タイプ ISSN
収録物識別子 00320889
PubMed番号
関連タイプ isIdenticalTo
識別子タイプ PMID
関連識別子 14630964
DOI
関連タイプ isIdenticalTo
識別子タイプ DOI
関連識別子 https://doi.org/10.1104/pp.103.034223
関連名称 10.1104/pp.103.034223
権利
権利情報 © 2013 by the American Society of Plant Biologists
関連サイト
識別子タイプ URI
関連識別子 http://www.plantcell.org/site/misc/ifora.xhtml
関連名称 Copyright
フォーマット
内容記述タイプ Other
内容記述 application/pdf
著者版フラグ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
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