NCBI Accession #
NP_567906.1
NCBI GenBank Nucleotide #
NM_119430.5
NCBI Official Full Name
tocopherol cyclase, chloroplast / vitamin E deficient 1 (VTE1) / sucrose export defective 1 (SXD1)
NCBI Official Symbol
VTE1
NCBI Official Synonym Symbols
ATSDX1; F4D11.30; F4D11_30; SUCROSE EXPORT DEFECTIVE 1; VITAMIN E DEFICIENT 1
NCBI Protein Information
tocopherol cyclase, chloroplast / vitamin E deficient 1 (VTE1) / sucrose export defective 1 (SXD1)
NCBI Summary
Tocopherol cyclase involved in tocopherol (vitamin E)synthesis. VTE1 over-expressing plants have increased tocopherol indicating VTE1 is a major limiting factor in tocopherol synthesis. Mutants defective in this gene accumulate high amounts of zeaxanthin in conditions of high light or low temperature. Plays a role in the adaptation to low temperature stress, notably phloem loading.
UniProt Synonym Gene Names
SXD1
UniProt Protein Name
Tocopherol cyclase, chloroplastic
UniProt Synonym Protein Names
Sucrose export defective 1; Vitamin E pathway gene 1 protein
UniProt Primary Accession #
Q94FY7
UniProt Secondary Accession #
O65524
UniProt Related Accession #
Q94FY7
UniProt Comments
Involved in the synthesis of both tocopherols and tocotrienols (vitamin E), which presumably protect photosynthetic complexes from oxidative stress. Catalyzes the conversion of 2-methyl-6-phytyl-1,4-hydroquinone and 2,3-dimethyl-5-phytyl-1,4-hydroquinone (DMPQ) to delta- and gamma-tocopherol respectively. Converts also 2,3-dimethyl-5-geranylgeranyl-1,4-hydroquinone (DMGQ) to gamma-tocotrienol.