OsFLN2,HSA1,GRA117

• Symbol: OsFLN2,HSA1,GRA117
• MSU: LOC_Os03g40550
• RAPdb: Os03g0602600

• FRUCTOKINASE-LIKE PROTEIN 1 interacts with TRXz to regulate chloroplast development in rice., 2018, J Integr Plant Biol.
• The newly identified heat-stress sensitive albino 1 gene affects chloroplast development in rice., 2017, Plant Sci.
• Characterization of dwarf and narrow leaf dnl-4 mutant in rice, 2020, Plant Signal Behav.
• A natural variation in the promoter of GRA117 affects carbon assimilation in rice., 2023, Planta.

Genbank accession number

• Map-based cloning revealed that HSA1 encodes a putative OsFLN2
• The hsa1 mutant harbors a recessive mutation in a gene encoding fructokinase-like protein2 (FLN2); the mutation causes a premature stop codon and results in a severe albino phenotype, with defects in early chloroplast development
• The color of hsa1 mutant plants gradually changed from albino to green at later stages of development at various temperatures and chloroplast biogenesis was strongly delayed at high temperature (32<U+202F>C)
• HSA1 localizes to the chloroplast and regulates chloroplast development
• These results demonstrated that HSA1 plays important roles in chloroplast development at early stages, and functions in protecting chloroplasts under heat stress at later stages in rice
• GRA117 encodes PfkB-type fructokinase-like 2, which is subcellularly localized in chloroplasts and is widely expressed in various rice tissues, particularly at high levels in leaf tissues
• RNA-Seq analysis revealed that GRA117 plays a significant role in photosynthetic carbon fixation, carbon metabolism, and chloroplast ribosome-related pathways
• Our study supports that GRA117 promotes the Calvin-Benson cycle by regulating chloroplast development, ultimately leading to enhanced carbon assimilation in rice
• GRA117 is crucial in the process of carbon assimilation in rice as it regulates the development of chloroplasts, which in turn facilitates the Calvin-Benson cycle