- Information
- Symbol: OsHGGT,HGGT,SGD1,RTD1
- MSU: LOC_Os06g44840
- RAPdb: Os06g0658900
- Publication
- Metabolic redesign of vitamin E biosynthesis in plants for tocotrienol production and increased antioxidant content, 2003, Nat Biotechnol.
- SGD1, a key enzyme in tocopherol biosynthesis, is essential for plant development and cold tolerance in rice., 2017, Plant Sci.
- Rice tocopherol deficiency 1 encodes a homogentisate phytyltransferase essential for tocopherol biosynthesis and plant development in rice., 2018, Plant Cell Rep.
- Antioxidant activity and inhibition of lipid peroxidation in germinating seeds of transgenic soybean expressing OsHGGT., 2010, J Agric Food Chem.
- Genbank accession number
- Key message
- cDNAs encoding homogentisic acid geranylgeranyl transferase (HGGT), which catalyzes the committed step of tocotrienol biosynthesis, were isolated from barley, wheat and rice seeds
- Overexpression of the barley HGGT in corn seeds resulted in an increase in tocotrienol and tocopherol content of as much as six-fold
- Our results indicate that SGD1 is essential for plant development and cold tolerance in rice
- A map-based cloning strategy and subsequent complementation test showed that SGD1 encodes homogentisate phytyltransferase (HPT), a key enzyme in tocopherol biosynthesis
- The rtd1 mutant showed overall growth retardation throughout the growth period
- The cold-related C-repeat-binding factor (CBF)/dehydration-responsive element-binding protein 1 (DREB1) genes were significantly upregulated in rtd1 under natural growth conditions
- RTD1 encodes a homogentisate phytyltransferase catalyzing a key step in rice tocopherol biosynthesis, confers cold tolerance and regulates rice development by affecting the accumulation of DELLA protein SLENDER RICE1
- Map-based cloning revealed that the RTD1 gene encoded a homogentisate phytyltransferase, a key enzyme catalyzing the committed step in tocopherol biosynthesis
- Cold tolerance was found to be reduced in rtd1
- Moreover, rtd1 exhibited a reduced response to gibberellin (GA)
- Therefore, it appears that the antioxidant potential of transgenic oil-producing plants such as soybean, sunflower, and corn may be enhanced by overexpressing OsHGGT during seed germination
- Connection
- OsHGGT~HGGT~SGD1~RTD1, SLR1~OsGAI~OsSLR1, Rice tocopherol deficiency 1 encodes a homogentisate phytyltransferase essential for tocopherol biosynthesis and plant development in rice., The transcript and protein levels of DELLA protein-coding gene SLENDER RICE 1 (SLR1) in rice was increased in rtd1
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