Vitamin E biosynthesis: biochemistry meets cell biology.
Vitamin E is thought to be involved in many essential processes in plants, but no functional proof has been reported. To study vitamin E deficiency in plants, a high-throughput biochemical screen for vitamin E quantification in Arabidopsis mutants has been developed, which has led to the identification of VTE1-encoding tocopherol cyclase. Interestingly, the corresponding maize mutation, sxd1, causes plasmodesmata malfunction, suggesting a link between tocopherol cyclase and plasmodesmata function.
Hofius
Daniel
D
Institut für Pflanzengenetik und Kulturpflanzenforschung (IPK), Corrensstrasse 3, D-06466 Gatersleben, Germany.
Sonnewald
Uwe
U
D017360:Arabidopsis / Q000201:enzymology / Q000235:genetics / Q000378:metabolism*; D019751:Intramolecular Transferases / Q000235:genetics / Q000378:metabolism; D009154:Mutation; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D018514:Plant Structures / Q000502:physiology; D024505:Tocopherols / Q000737:chemistry / Q000378:metabolism*; D014810:Vitamin E / Q000096:biosynthesis* / Q000737:chemistry; D003313:Zea mays / Q000235:genetics; D024502:alpha-Tocopherol / Q000737:chemistry / Q000378:metabolism; D024503:beta-Tocopherol / Q000737:chemistry / Q000378:metabolism; D024504:gamma-Tocopherol / Q000737:chemistry / Q000378:metabolism
D010940:Plant Proteins; C432453:Sxd1 protein, Zea mays; D014810:Vitamin E; D024504:gamma-Tocopherol; D024503:beta-Tocopherol; D019751:Intramolecular Transferases; C103397:tocopherol cyclase; D024502:alpha-Tocopherol; D024505:Tocopherols