EOG873S6H GO:0004719 11/52 protein-L-isoaspartate (D-aspartate) O-methyltransferase activity molecular_function "Catalysis of the reaction: S-adenosyl-L-methionine + protein L-beta-aspartate = S-adenosyl-L-homocysteine + protein L-beta-aspartate methyl ester." [EC:2.1.1.77]