Protein
Lycopene beta cyclase, chloroplastic
Organism
Arabidopsis thaliana
Function
Involved in carotenoid biosynthesis. Catalyzes the double cyclization reaction which converts lycopene to beta-carotene and neurosporene to beta-zeacarotene (PubMed:8837512). Major lycopene beta-cyclase that does not seem to be involved in neoxanthin synthesis (PubMed:19549928). Involved in salt tolerance improvement by increasing synthesis of carotenoids, which impairs reactive oxygen species (ROS) and protects the photosynthetic system under salt stress (PubMed:21471119).
Similarity
Belongs to the lycopene cyclase family.
Sequence
MDTLLKTPNKLDFFIPQFHGFERLCSNNPYHSRVRLGVKKRAIKIVSSVVSGSAALLDLVPETKKENLDFELPLYDTSKSQVVDLAIVGGGPAGLAVAQQVSEAGLSVCSIDPSPKLIWPNNYGVWVDEFEAMDLLDCLDTTWSGAVVYVDEGVKKDLSRPYGRVNRKQLKSKMLQKCITNGVKFHQSKVTNVVHEEANSTVVCSDGVKIQASVVLDATGFSRCLVQYDKPYNPGYQVAYGIVAEVDGHPFDVDKMVFMDWRDKHLDSYPELKERNSKIPTFLYAMPFSSNRIFLEETSLVARPGLRMEDIQERMAARLKHLGINVKRIEEDERCVIPMGGPLPVLPQRVVGIGGTAGMVHPSTGYMVARTLAAAPIVANAIVRYLGSPSSNSLRGDQLSAEVWRDLWPIERRRQREFFCFGMDILLKLDLDATRRFFDAFFDLQPHYWHGFLSSRLFLPELLVFGLSLFSHASNTSRLEIMTKGTVPLAKMINNLVQDRD