ArticleJournal of bacteriology2013
Analysis of two polyhydroxyalkanoate synthases in Bradyrhizobium japonicum USDA 110.
Article in Journal of bacteriology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.
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Who cites it
26 citing papers in PubMed, 48 citations in OpenAlex.
- Insights into transcriptional expression and putative functions of multiple polyhydroxyalkanoate synthase paralogs in Haloferax mediterranei.FEMS microbiology letters · 2026Article
- Polyhydroxyalkanoate synthesis by Sinorhizobium meliloti drives a host-specific collapse in symbiosis with Medicago sativa.Research square · 2025Article
- Article
- The distinct cell physiology of Bradyrhizobium at the population and cellular level.BMC microbiology · 2024Article
- Pleiotropic Effects of PhaR Regulator inInternational journal of molecular sciences · 2024Article
- Biosynthesis of polyhydroxybutyrate byFrontiers in plant science · 2024Article
- Regulatory and structural mechanisms of PvrA-mediated regulation of the PQS quorum-sensing system and PHA biosynthesis in Pseudomonas aeruginosa.Nucleic acids research · 2023Article
- Construction of a Rhodobacter sphaeroides Strain That Efficiently Produces Hydrogen Gas from Acetate without Poly(β-Hydroxybutyrate) Accumulation: Insight into the Role of PhaR in Acetate Metabolism.Applied and environmental microbiology · 2022Article
- Redox Regulation in Diazotrophic Bacteria in Interaction with Plants.Antioxidants (Basel, Switzerland) · 2021Review
- A Stringent-Response-Defective Bradyrhizobium diazoefficiens Strain Does Not Activate the Type 3 Secretion System, Elicits an Early Plant Defense Response, and Circumvents NHApplied and environmental microbiology · 2021Article
- The Fungicide Tetramethylthiuram Disulfide Negatively Affects Plant Cell Walls, Infection Thread Walls, and Symbiosomes in Pea (Plants (Basel, Switzerland) · 2020Article
- How do less-expensive nitrogen alternatives affect legume sanctions on rhizobia?Ecology and evolution · 2020Article
- Efficacy of a Plant-Microbe System:Frontiers in microbiology · 2020Article
- Coordinated Regulation of the Size and Number of Polyhydroxybutyrate Granules by Core and Accessory Phasins in the Facultative Microsymbiont Sinorhizobium fredii NGR234.Applied and environmental microbiology · 2019Article
- Expanding the Regulon of theFrontiers in microbiology · 2019Article
- Soybean-Nodulating Strains With Low Intrinsic Competitiveness for Nodulation, Good Symbiotic Performance, and Stress-Tolerance Isolated From Soybean-Cropped Soils in Argentina.Frontiers in microbiology · 2019Article
- Bradyrhizobium diazoefficiens USDA110 PhaR functions for pleiotropic regulation of cellular processes besides PHB accumulation.BMC microbiology · 2018Article
- Review
- PHB Biosynthesis Counteracts Redox Stress inFrontiers in microbiology · 2018Article
- Induction byFrontiers in microbiology · 2018Article
Corrections and comments
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Authors and funding
5 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Bradyrhizobium japonicum USDA 110 has five polyhydroxyalkanoate (PHA) synthases (PhaC) annotated in its genome: bll4360 (phaC1), bll6073 (phaC2), blr3732 (phaC3), blr2885 (phaC4), and bll4548 (phaC5). All these proteins possess the catalytic triad and conserved amino acid residues of polyester synthases and are distributed into four different PhaC classes. We obtained mutants in each of these paralogs and analyzed phaC gene expression and PHA production in liquid cultures. Despite the genetic redundancy, only phaC1 and phaC2 were expressed at significant rates, while PHA accumulation in stationary-phase cultures was impaired only in the ΔphaC1 mutant. Meanwhile, the ΔphaC2 mutant produced more PHA than the wild type under this condition, and surprisingly, the phaC3 transcript increased in the ΔphaC2 background. A double mutant, the ΔphaC2 ΔphaC3 mutant, consistently accumulated less PHA than the ΔphaC2 mutant. PHA accumulation in nodule bacteroids followed a pattern similar to that seen in liquid cultures, being prevented in the ΔphaC1 mutant and increased in the ΔphaC2 mutant in relation to the level in the wild type. Therefore, we used these mutants, together with a ΔphaC1 ΔphaC2 double mutant, to study the B. japonicum PHA requirements for survival, competition for nodulation, and plant growth promotion. All mutants, as well as the wild type, survived for 60 days in a carbon-free medium, regardless of their initial PHA contents. When competing for nodulation against the wild type in a 1:1 proportion, the ΔphaC1 and ΔphaC1 ΔphaC2 mutants occupied only 13 to 15% of the nodules, while the ΔphaC2 mutant occupied 81%, suggesting that the PHA polymer is required for successful competitiveness. However, the bacteroid content of PHA did not affect the shoot dry weight accumulation.
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