Catalyzes the transamination between an unstable intermediate ((S)-ureidoglycine) and the end product of purine catabolism (glyoxylate) to yield oxalurate and glycine. Glyoxylate is the preferred substrate, but other amino-group acceptors can be used. (S)-2-ureidoglycine + glyoxylate = glycine + N-carbamoyl-2-oxoglycine Nitrogen metabolism; (S)-allantoin degradation. Homodimer. Expression is very low in excess nitrogen (glutamate plus ammonia) and is induced during limiting-nitrogen conditions (glutamate). Expression is further induced when allantoin is added during limiting-nitrogen conditions. Belongs to the class-V pyridoxal-phosphate-dependent aminotransferase family.