Protein
4-alpha-glucanotransferase DPE1, chloroplastic/amyloplastic
Organism
Arabidopsis thaliana
Function
Chloroplastic alpha-glucanotransferase involved in maltotriose metabolism. Probably uses maltotriose as substrate to transfer a maltosyl unit from one molecule to another, resulting in glucose and maltopentaose. The latter can then be further metabolized to maltose and maltotriose by beta-amylase. Required for normal starch degradation in leaves.
Similarity
Belongs to the disproportionating enzyme family.
Sequence
MSILLRPSSSPSLCSSLKLFRLSSPDSLIDAAVLRNRTKPSQSFRMEVVSSNSTCLSSISVGEDFPSEYEQWLPVPDPESRRRAGVLLHPTSFRGPHGIGDLGEEAFRFIDWLHSTGCSVWQVLPLVPPDEGGSPYAGQDANCGNTLLISLDELVKDGLLIKDELPQPIDADSVNYQTANKLKSPLITKAAKRLIDGNGELKSKLLDFRNDPSISCWLEDAAYFAAIDNTLNAYSWFEWPEPLKNRHLSALEAIYESQKEFIDLFIAKQFLFQRQWQKVREYARRQGVDIMGDMPIYVGYHSADVWANKKHFLLNKKGFPLLVSGVPPDLFSETGQLWGSPLYDWKAMESDQYSWWVNRIRRAQDLYDECRIDHFRGFAGFWAVPSEAKVAMVGRWKVGPGKSLFDAISKGVGKIKIIAEDLGVITKDVVELRKSIGAPGMAVLQFAFGGGADNPHLPHNHEVNQVVYSGTHDNDTIRGWWDTLDQEEKSKAMKYLSIAGEDDISWSVIQAAFSSTAQTAIIPMQDILGLGSSARMNTPATEVGNWGWRIPSSTSFDNLETESDRLRDLLSLYGRL