ArticleThe Plant cell2022
Glutamate 1-semialdehyde aminotransferase is connected to GluTR by GluTR-binding protein and contributes to the rate-limiting step of 5-aminolevulinic acid synthesis.
Article in The Plant cell, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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18 citing papers in PubMed, 27 citations in OpenAlex.
- Milestones in the Elucidation of Heme Biosynthesis.Chemical reviews · 2026Review
- Gene Families, Structural and Functional Contexts Shape Protein Thermostability and Paralog Divergence inPlants (Basel, Switzerland) · 2026Article
- Effects of Salinity on Bacterial Spot Disease, Physiology, Growth, Fruit Quality, and Transcriptomic Responses in Tomato Plants.Plants (Basel, Switzerland) · 2026Article
- Sustainable tea plantations: Harnessing chemical-microbial synergy and smart application triangulation for targeted weed control.Journal of advanced research · 2026Review
- N-myristoylation-mediated shuttling of TaMP from plasma membrane to chloroplasts increases wheat susceptibility to rust fungi.Nature plants · 2026Article
- Convergent roles of BcGUN4.1, BcSG1, BcCHLH, and BcTPR4 in regulating the leaf greenness of non-heading Chinese cabbage.Molecular horticulture · 2026Article
- Vermicompost promotes apple seedling growth by enhancing photosynthetic efficiency and driving chlorophyll biosynthesis.Frontiers in plant science · 2026Article
- Ectopic Over-Expression ofPlants (Basel, Switzerland) · 2025Article
- The 14-3-3 Protein SlTFT1 Accelerates Tomato Fruit Ripening by Binding and Stabilising YFT1 in the Ethylene Signalling Pathway.Plant biotechnology journal · 2025Article
- Regulatory and retrograde signaling networks in the chlorophyll biosynthetic pathway.Journal of integrative plant biology · 2025Review
- Redox regulation of glutamate-1-semialdehyde aminotransferase modulates the synthesis of 5-aminolevulinic acid in Arabidopsis.Frontiers in plant science · 2025Article
- Modification of aggregation-prone regions of Arabidopsis glutamyl-tRNA reductase leads to increased stability while maintaining enzyme activity.Frontiers in plant science · 2025Article
- A novel tetratricopeptide-repeat protein, TTP1, forms complexes with glutamyl-tRNA reductase and protochlorophyllide oxidoreductase during tetrapyrrole biosynthesis.Journal of experimental botany · 2024Article
- 5-Aminolevulinic acid improves cold resistance through regulation of SlMYB4/SlMYB88-SlGSTU43 module to scavenge reactive oxygen species in tomato.Horticulture research · 2024Article
- Translation Fidelity and Respiration Deficits in CLPP-Deficient Tissues: Mechanistic Insights from Mitochondrial Complexome Profiling.International journal of molecular sciences · 2023Article
- Article
- Genetic and physiological responses to light quality in a deep ocean ecotype of Ostreococcus, an ecologically important photosynthetic picoeukaryote.Journal of experimental botany · 2023Article
- Transcriptome Profiling Provides Insights into the Early Development of Tiller Buds in High- and Low-Tillering Orchardgrass Genotypes.International journal of molecular sciences · 2023Article
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4 authors at 1 institution in 1 country.
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Abstract
Tetrapyrroles play fundamental roles in crucial processes including photosynthesis, respiration, and catalysis. In plants, 5-aminolevulinic acid (ALA) is the common precursor of tetrapyrroles. ALA is synthesized from activated glutamate by the enzymes glutamyl-tRNA reductase (GluTR) and glutamate-1-semialdehyde aminotransferase (GSAAT). ALA synthesis is recognized as the rate-limiting step in this pathway. We aimed to explore the contribution of GSAAT to the control of ALA synthesis and the formation of a protein complex with GluTR. In Arabidopsis thaliana, two genes encode GSAAT isoforms: GSA1 and GSA2. A comparison of two GSA knockout mutants with the wild-type revealed the correlation of reduced GSAAT activity and ALA-synthesizing capacity in leaves with lower chlorophyll content. Growth and green pigmentation were more severely impaired in gsa2 than in gsa1, indicating the predominant role of GSAAT2 in ALA synthesis. Interestingly, GluTR accumulated to higher levels in gsa2 than in the wild-type and was mainly associated with the plastid membrane. We propose that the GSAAT content modulates the amount of soluble GluTR available for ALA synthesis. Several different biochemical approaches revealed the GSAAT-GluTR interaction through the assistance of GluTR-binding protein (GBP). A modeled structure of the tripartite protein complex indicated that GBP mediates the stable association of GluTR and GSAAT for adequate ALA synthesis.
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