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NCP activates chloroplast transcription by controlling phytochrome-dependent dual nuclear and plastidial switches

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  • Emily J. Yang

    (University of California
    Duke University
    Columbia University Medical Center)

  • Chan Yul Yoo

    (University of California)

  • Jiangxin Liu

    (Duke University Medical Center
    Chinese Academy of Sciences)

  • He Wang

    (University of California)

  • Jun Cao

    (Max Planck Institute for Developmental Biology)

  • Fay-Wei Li

    (Duke University
    Boyce Thompson Institute)

  • Kathleen M. Pryer

    (Duke University)

  • Tai-ping Sun

    (Duke University)

  • Detlef Weigel

    (Max Planck Institute for Developmental Biology)

  • Pei Zhou

    (Duke University Medical Center)

  • Meng Chen

    (University of California)

Abstract

Phytochromes initiate chloroplast biogenesis by activating genes encoding the photosynthetic apparatus, including photosynthesis-associated plastid-encoded genes (PhAPGs). PhAPGs are transcribed by a bacterial-type RNA polymerase (PEP), but how phytochromes in the nucleus activate chloroplast gene expression remains enigmatic. We report here a forward genetic screen in Arabidopsis that identified NUCLEAR CONTROL OF PEP ACTIVITY (NCP) as a necessary component of phytochrome signaling for PhAPG activation. NCP is dual-targeted to plastids and the nucleus. While nuclear NCP mediates the degradation of two repressors of chloroplast biogenesis, PIF1 and PIF3, NCP in plastids promotes the assembly of the PEP complex for PhAPG transcription. NCP and its paralog RCB are non-catalytic thioredoxin-like proteins that diverged in seed plants to adopt nonredundant functions in phytochrome signaling. These results support a model in which phytochromes control PhAPG expression through light-dependent double nuclear and plastidial switches that are linked by evolutionarily conserved and dual-localized regulatory proteins.

Suggested Citation

  • Emily J. Yang & Chan Yul Yoo & Jiangxin Liu & He Wang & Jun Cao & Fay-Wei Li & Kathleen M. Pryer & Tai-ping Sun & Detlef Weigel & Pei Zhou & Meng Chen, 2019. "NCP activates chloroplast transcription by controlling phytochrome-dependent dual nuclear and plastidial switches," Nature Communications, Nature, vol. 10(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10517-1
    DOI: 10.1038/s41467-019-10517-1
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    Cited by:

    1. Chanhee Kim & Yongmin Kwon & Jaehoon Jeong & Minji Kang & Ga Seul Lee & Jeong Hee Moon & Hyo-Jun Lee & Youn-Il Park & Giltsu Choi, 2023. "Phytochrome B photobodies are comprised of phytochrome B and its primary and secondary interacting proteins," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    2. Youra Hwang & Soeun Han & Chan Yul Yoo & Liu Hong & Chenjiang You & Brandon H. Le & Hui Shi & Shangwei Zhong & Ute Hoecker & Xuemei Chen & Meng Chen, 2022. "Anterograde signaling controls plastid transcription via sigma factors separately from nuclear photosynthesis genes," Nature Communications, Nature, vol. 13(1), pages 1-16, December.
    3. Ruth Jean Ae Kim & De Fan & Jiangman He & Keunhwa Kim & Juan Du & Meng Chen, 2024. "Photobody formation spatially segregates two opposing phytochrome B signaling actions of PIF5 degradation and stabilization," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    4. Juan Du & Keunhwa Kim & Meng Chen, 2024. "Distinguishing individual photobodies using Oligopaints reveals thermo-sensitive and -insensitive phytochrome B condensation at distinct subnuclear locations," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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