| 摘要 |
Disclosed are polynucleotides, polypeptides, and gene therapy vectors relating to biologically active methylmalonyl-CoA mutase enzymes, internally tagged with an immunoaffinity and detection epitope, which has been designed and tested in mouse models of methylmalonic acidemia (MMA). The polypeptides and polynucleotides of the present invention contain a mitochondrial leader sequence fused to tag, such as an HA, 3xFLAG, or V5 tag placed in a region of the methylmalonyl-CoA mutase enzyme that maintains mitochondrial localization and function, e.g., the 5' end of a methylmalonyl-CoA mutase polynucleotide is replaced with an engineered nucleotide sequence that encodes the endogenous mitochondrial importation sequence, a mitochondrial protease cleavage site, and a tag. The polynucleotides and polypeptides of the invention are useful to treat conditions such as MMA, and to assay both activity and biodistribution after gene therapy in varied models of MMA. |
