What question did this study set out to answer?

This research aims to investigate the role of the FixLJ two-component system in nitrogen fixation regulation under different oxygen conditions in Rhodopseudomonas palustris.

April 12, 2026mLifeOpen Access

The oxygen‐sensing FixLJ represses nitrogen fixation in Rhodopseudomonas palustris in response to oxygen

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Authors

LCLingwei CuiInstitute of Mechanics YZYuxin ZengChinese Academy of Sciences MWMengdi WangChongqing University of Posts and Telecommunications

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Implication

Research shows FixLJ represses nitrogenase expression in free-living diazotrophs, suggesting new regulatory mechanisms.

Key Points

This research aims to investigate the role of the FixLJ two-component system in nitrogen fixation regulation under different oxygen conditions in Rhodopseudomonas palustris.
Examined the expression of nifHDK genes in response to oxygen levels.
Deleted fixLJ genes to analyze their impact on nitrogenase activity.
Conducted transcriptome analysis to explore energy metabolism roles related to FixLJ.
FixLJ significantly inhibits nifHDK expression when oxygen is present.
Deletion of fixLJ allows R. palustris to express active nitrogenase in oxygen environments.
Transcriptome analysis indicates FixLJ may regulate energy metabolism in R. palustris.

Cite This Study

Cui et al. (2026) studied this question.

synapsesocial.com/papers/69db37ca4fe01fead37c5db4 https://doi.org/10.1002/mlf2.70067

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The oxygen‐sensing FixLJ represses nitrogen fixation in Rhodopseudomonas palustris in response to oxygen

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Implication

Key Points

Cite This Study

The oxygen‐sensing FixLJ represses nitrogen fixation in Rhodopseudomonas palustris in response to oxygen

Discussion

Member takes

Implication

Key Points

Cite This Study

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