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TitleA dynein-associated photoreceptor protein prevents ciliary acclimation to blue light.
Journal, issue, pagesSci Adv, Vol. 7, Issue 9, Year 2021
Publish dateFeb 26, 2021
AuthorsOsamu Kutomi / Ryosuke Yamamoto / Keiko Hirose / Katsutoshi Mizuno / Yuuhei Nakagiri / Hiroshi Imai / Akira Noga / Jagan Mohan Obbineni / Noemi Zimmermann / Masako Nakajima / Daisuke Shibata / Misa Shibata / Kogiku Shiba / Masaki Kita / Hideo Kigoshi / Yui Tanaka / Yuya Yamasaki / Yuma Asahina / Chihong Song / Mami Nomura / Mamoru Nomura / Ayako Nakajima / Mia Nakachi / Lixy Yamada / Shiori Nakazawa / Hitoshi Sawada / Kazuyoshi Murata / Kaoru Mitsuoka / Takashi Ishikawa / Ken-Ichi Wakabayashi / Takahide Kon / Kazuo Inaba /
PubMed AbstractLight-responsive regulation of ciliary motility is known to be conducted through modulation of dyneins, but the mechanism is not fully understood. Here, we report a novel subunit of the two-headed ...Light-responsive regulation of ciliary motility is known to be conducted through modulation of dyneins, but the mechanism is not fully understood. Here, we report a novel subunit of the two-headed f/I1 inner arm dynein, named DYBLUP, in animal spermatozoa and a unicellular green alga. This subunit contains a BLUF (sensors of blue light using FAD) domain that appears to directly modulate dynein activity in response to light. DYBLUP (dynein-associated BLUF protein) mediates the connection between the f/I1 motor domain and the tether complex that links the motor to the doublet microtubule. lacking the DYBLUP ortholog shows both positive and negative phototaxis but becomes acclimated and attracted to high-intensity blue light. These results suggest a mechanism to avoid toxic strong light via direct photoregulation of dyneins.
External linksSci Adv / PubMed:33637535 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution25.0 Å
Structure data

EMDB-12160:
Cilia from MOT7 deletion mutant of Chlamydomonas
Method: EM (subtomogram averaging) / Resolution: 25.0 Å

EMDB-12161:
Chlamydomonas cilia with MOT7-BCCP labeled
Method: EM (subtomogram averaging) / Resolution: 25.0 Å

EMDB-12162:
Microtubule doublet structure from WT Chlamydomonas as a control for MOT7 mutants
Method: EM (subtomogram averaging) / Resolution: 25.0 Å

Source
  • Chlamydomonas reinhardtii (plant)

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