RPT2/NCH1 subfamily of NPH3-like proteins is essential for the chloroplast accumulation response in land plants
Open accessAbstract
Significance: The photoreceptor phototropin mediates various blue light-induced responses, including phototropism, chloroplast movement, stomatal opening, and leaf flattening. Two BTB/POZ proteins, NONPHOTOTROPIC HYPOCOTYL 3 (NPH3) and ROOT PHOTOTROPISM 2 (RPT2), were identified as early signaling components in phototropin-mediated phototropism and leaf flattening, and a phototropin substrate, BLUE LIGHT SIGNALING1 kinase, specifically mediates the phototropin-mediated stomatal opening. However, early signaling components in the chloroplast movement remain to be determined. We found that RPT2 and the NPH3/RPT2-like (NRL) protein NRL PROTEIN FOR CHLOROPLAST MOVEMENT 1 (NCH1) redundantly mediate the chloroplast accumulation response but not the avoidance response. Our findings indicate that phototropin-mediated phototropism, leaf flattening, and the chloroplast accumulation response, but not the chloroplast avoidance response and stomatal opening, are mediated by NRL proteins.
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JAC1 is necessary for the chloroplast accumulation response.
“The accessory protein, auxin-like 6 or j-domain protein required for chloroplast accumulation response 1 (JAC1), is necessary for the chloroplast accumulation response.”
From The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants (2022) · cites this paper as Suetsugu et al., 2016b
jac1 mutants are defective in the chloroplast accumulation response, similar to rpt2 nch1 plants.
“jac1 mutants were defective in the response to chloroplast accumulation, similar to rpt2 nch1 plants”
From The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants (2022) · cites this paper as Suetsugu et al., 2016b
Arabidopsis contains two blue light photoreceptors, phot1 and phot2, which mediate chloroplast accumulation responses and are regulated by the phototropin-interacting proteins NCH1 and RPT2.
“Arabidopsis contains two blue light photoreceptors, phot1 and phot2, mediate chloroplast accumulation responses and regulate by two phototropin-interacting proteins, NCH1 and RPT2”
From The action of enhancing weak light capture via phototropic growth and chloroplast movement in plants (2022) · cites this paper as Suetsugu et al., 2016b
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References 60 · Cited by 64
- Authors
- Suetsugu, N., Takemiya, A., Kong, S.-G., Higa, T., Komatsu, A., Shimazaki, K.-I., Kohchi, T., & Wada, M.
- Affiliations
- Kyushu University (JP)
- Kyoto University (JP)
- ORCID
- Venue
- Proceedings of the National Academy of Sciences
- Publisher
- National Academy of Sciences
- Published
- 2016-08-30
- Volume
- 113
- Issue
- 37
- Pages
- 10424-10429
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- PMC
- PMC5027436
- OpenAlex
- W2514207217
- Cited by
- 64
- References
- 60
- Citations by year
- 2026: 7 · 2025: 7 · 2024: 15 · 2023: 6 · 2022: 5 · 2021: 6 · 2020: 6 · 2019: 2 · 2018: 6 · 2017: 4
- FWCI
- 4.67
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Proceedings of the National Academy of Sciences (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Institutional Repositories DataBase (IRDB) (submittedVersion)
- Kyoto University Research Information Repository (Kyoto University) (submittedVersion)
- Funders
- Japan Society for the Promotion of Science (26840097, 23120521, 25120719, 25440140, 21227001, 23120516, 25120716, 25113009, 20227001, 23120523, 25120721, 25251033, 15KK0254)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Light effects on plants
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Molecular Biology Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
- Keywords
- Rpt2, phototropin, phototropism, BTB domain proteins, stomatal opening, Marchantia polymorpha, Arabidopsis thaliana
- MeSH terms
- Chloroplasts, Light, Phosphoproteins, Photosynthesis, Protein Serine-Threonine Kinases, Arabidopsis, Plant Leaves, Plant Roots, Phototropism, Embryophyta, Arabidopsis Proteins, Plants, Genetically Modified
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