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AssigneeThe U.S.A., as represented by the Secretary, Department of Health and Human Services
InventorsCharles P. Venditti, PamelaSara Elbaz Head
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This application provides the first observation of methylmalonylation/malonylation in organic acidemias (OAs), such as methylmalonic acidemia (MMA) and propionic acidemia (PA), which results in modification of enzymes in key pathways dysregulated in OAs, including sirtuin 5 (SIRT5). Hyperacylation of SIRT5 prevents it from de-acylating CPS1 (including removing methymalonyllation), which prevents activation of CPS1 and likewise, inhibits a key component of the glycine cleavage system, GCSH. Based on these observations, provided herein is a mutant form of SIRT5 containing four mutated lysines that cannot accept acyl groups, methods of its use for treating OA patients, and kits.
An isolated mutant sirtuin 5 (SIRTS) protein comprising at least 80%, at least 81%, at least 82%, at least 83%, at least 84%,at least 85%, at least 86%, at least 87%, at least 88%, at least 89%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or 100% sequence identity to SEQ ID NO:
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Dependencies are inferred from the claim text.