Du1 cDNA coding for a starch synthase enzyme from maize

摘要

An isolated cDNA that encodes a starch synthase enzyme from maize has the sequence shown in SEQ ID NO:1. Proteins that are encoded by the cDNA, vectors and cells and transgenic plants transfected with the vector are also described. A DNA molecule that encodes a polypeptide having a N-terminal arm region comprising an amyloplast targeting peptide and a C-terminal region catalytic region comprising alpha-1,4-glycosyltransferase catalytic activity and with a region of amino acid 769 to amino acid 1675 of SEQ ID NO:12 is also described. Starch can be produced in a cell by transforming a cell with the vectors encoding the enzyme and purifying the starch produced.