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January 22, 2026The Plant Journal

Chloroplast glutaredoxin S12 regulates photosynthesis and growth through redox modulation of SufB

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Authors

YLYanshuang LiuJYJuanjuan YuHWHaotian Wang

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Overview

Demonstrates how GrxS12 influences photosynthesis and growth in plants by modifying SufB, suggesting critical redox roles in chloroplasts.

Key Points

  • To investigate how chloroplast glutaredoxin S12 (GrxS12) influences redox homeostasis and Fe–S protein maturation.
  • Analyzed the role of specific cysteines in GrxS12 in relation to its oxidoreductase activity.
  • Assessed the interaction between GrxS12 and the Fe–S cluster assembly protein SufB.
  • Examined the impact of GrxS12 loss on chloroplast protein redox states and growth parameters.
  • Identified cysteine 34 as crucial for GrxS12's oxidoreductase activity.
  • Loss of GrxS12 led to increased oxidation of SufB and reduced levels of several Fe–S proteins.
  • Observed reduced photosynthetic efficiency and slower growth in mutants lacking GrxS12.

Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/6971bd90642b1836717e22dchttps://doi.org/10.1111/tpj.70666
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