Involved in the methylthioribose (MTR) recycling pathway (PubMed:12022921, PubMed:24837359). Probably catalyzes the conversion of 2-oxoglutaramate to 2-oxoglutarate (PubMed:24837359). 2-oxoglutaramate + H2O = 2-oxoglutarate + NH4(+) Impaired growth on methylthioribose (MTR) as sole sulfur source. Belongs to the carbon-nitrogen hydrolase superfamily. NIT1/NIT2 family.