FIB,TSG1,OsFIB,MHZ10,OsTAR2

• Symbol: FIB,TSG1,OsFIB,MHZ10,OsTAR2
• MSU: LOC_Os01g07500
• RAPdb: Os01g0169800

• The rice FISH BONE gene encodes a tryptophan aminotransferase, which affects pleiotropic auxin-related processes, 2014, Plant J.
• TILLERING AND SMALL GRAIN 1 dominates the tryptophan aminotransferase family required for local auxin biosynthesis in rice., 2019, J Integr Plant Biol.
• Targeted Phytohormone Profiling Identifies Potential Regulators of Spikelet Sterility in Rice under Combined Drought and Heat Stress., 2021, Int J Mol Sci.
• Rice EIL1 interacts with OsIAAs to regulate auxin biosynthesis mediated by the tryptophan aminotransferase MHZ10/OsTAR2 during root ethylene responses., 2022, Plant Cell.

Genbank accession number

• The rice FISH BONE gene encodes a tryptophan aminotransferase, which affects pleiotropic auxin-related processes
• FIB encodes an orthologue of TAA genes and loss of FIB function resulted in pleiotropic abnormal phenotypes, such as small leaves with large lamina joint angles,
• FIB encodes an orthologue of TAA genes and loss of FIB function resulted in pleiotropic abnormal phenotypes, such as small leaves with large lamina joint angles, abnormal vascular development, small panicles, abnormal organ identity and defects in root development, together with a reduction in internal IAA levels.
• From these results, we suggest that FIB plays a pivotal role in IAA biosynthesis in rice and that auxin biosynthesis, transport and sensitivity are closely interrelated.
• TSG1 knockout resulted in an increased tiller number but reduction in grain number and size, and decrease in height
• These findings suggest that TSG1 dominates the tryptophan aminotransferase family, playing a prominent role in local auxin biosynthesis in rice
• The tsg1 mutant showed hypersensitivity to IAA and the competitive inhibitor of aminotransferase, L-kynurenine
• TSG1 encodes a tryptophan aminotransferase that is allelic to the FISH BONE (FIB) gene
• Meanwhile, deletion of the TSG1 homologs OsTAR1, OsTARL1, and OsTARL2 caused no obvious changes, although the phenotype of the TSG1/OsTAR1 double mutant was intensified and infertile, suggesting gene redundancy in the rice tryptophan aminotransferase family

• FIB~TSG1~OsFIB~MHZ10~OsTAR2, OsTAR1, TILLERING AND SMALL GRAIN 1 dominates the tryptophan aminotransferase family required for local auxin biosynthesis in rice., Meanwhile, deletion of the TSG1 homologs OsTAR1, OsTARL1, and OsTARL2 caused no obvious changes, although the phenotype of the TSG1/OsTAR1 double mutant was intensified and infertile, suggesting gene redundancy in the rice tryptophan aminotransferase family
• FIB~TSG1~OsFIB~MHZ10~OsTAR2, OsTAR1, TILLERING AND SMALL GRAIN 1 dominates the tryptophan aminotransferase family required for local auxin biosynthesis in rice., Interestingly, TSG1 and OsTAR1, but not OsTARL1 and OsTARL2, displayed marked aminotransferase activity
• FIB~TSG1~OsFIB~MHZ10~OsTAR2, OsTAR1, TILLERING AND SMALL GRAIN 1 dominates the tryptophan aminotransferase family required for local auxin biosynthesis in rice., Meanwhile, subcellular localization was identified as the endoplasmic reticulum, while phylogenetic analysis revealed functional divergence of TSG1 and OsTAR1 from OsTARL1 and OsTARL2
• FIB~TSG1~OsFIB~MHZ10~OsTAR2, OsYUCCA1~OsYUC1, Targeted Phytohormone Profiling Identifies Potential Regulators of Spikelet Sterility in Rice under Combined Drought and Heat Stress., In the flag leaves, increased accumulation of auxins was correlated with increased transcript levels of YUCCA-like gene 1 (OsYUCCA1) and fish bone (OsFIB), in AVT2-5315 under combined stress