Characterisation of recombinant epithiospecifier protein and its over-expression in Arabidopsis thaliana.
Epithiospecifier protein (ESP) is a protein that catalyses formation of epithionitriles during glucosinolate hydrolysis. In vitro assays with a recombinant ESP showed that the formation of epithionitriles from alkenylglucosinolates is ESP and ferrous ion dependent. Nitrile formation in vitro however does not require ESP but only the presence of Fe(II) and myrosinase. Ectopic expression of ESP in Arabidopsis thaliana Col-5 under control of the strong viral CaMV 35S promoter altered the glucosinolate product profile from isothiocyanates towards the corresponding nitriles.
Zabala
Marta de Torres
Mde T
Department of Agricultural Sciences, Imperial College, University of London, Wye, Ashford, Kent TN25 5AH, UK.
Grant
Murray
M
Bones
Atle M
AM
Bennett
Richard
R
Lim
Yin Sze
YS
Kissen
Ralph
R
Rossiter
John T
JT
D000595:Amino Acid Sequence; D017360:Arabidopsis / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000096:biosynthesis / Q000737:chemistry* / Q000378:metabolism*; D004798:Enzymes / Q000096:biosynthesis / Q000737:chemistry* / Q000378:metabolism*; D005296:Ferrous Compounds; D015870:Gene Expression; D005961:Glucosinolates / Q000378:metabolism*; D008969:Molecular Sequence Data; D030821:Plants, Genetically Modified; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000378:metabolism; D013379:Substrate Specificity
D029681:Arabidopsis Proteins; D004798:Enzymes; D005296:Ferrous Compounds; D005961:Glucosinolates; D011994:Recombinant Proteins; C450151:epithiospecifier protein, Arabidopsis