Protein
Demethyl-4-deoxygadusol synthase
Organism
Anabaena variabilis (strain ATCC 29413 / PCC 7937)
Function
Catalyzes the conversion of sedoheptulose 7-phosphate to demethyl-4-deoxygadusol (DDG) (PubMed:22741921). Involved in the synthesis of the mycosporine-like amino acid shinorine, a natural sunscreen compound that protects the cell against UV radiation (By similarity).
Similarity
Belongs to the sugar phosphate cyclases superfamily. DDGS family.
Sequence
MSIVQAKFEAKETSFHVEGYEKIEYDLVYVDGIFEIQNSALADVYQGFGRCLAIVDANVSRLYGNQIQAYFQYYGIELRLFPITITEPDKTIQTFERVIDVFADFKLVRKEPVLVVGGGLITDVVGFACSTYRRSSNYIRIPTTLIGLIDASVAIKVAVNHRKLKNRLGAYHASRKVFLDFSLLRTLPTDQVRNGMAELVKIAVVAHQEVFELLEKYGEELLRTHFGNIDATPEIKEIAHRLTYKAIHKMLELEVPNLHELDLDRVIAYGHTWSPTLELAPRLPMFHGHAVNVDMAFSATIAARRGYITIAERDRILGLMSRVGLSLDHPMLDIDILWRGTESITLTRDGLLRAAMPKPIGDCVFVNDLTREELAAALADHKELCTSYPRGGEGVDVYPVYQKELIGSVK