Term Name:	glycine N-methyltransferase deficiency
Synonyms:	GNMT deficiency, hypermethioninemia due to glycine N-methyltransferase deficiency, hypermethioninemia due to GNMT deficiency
Definition:	A hypermethioninemia characterized by autosomal recessive inheritance of persistent isolated hypermethioninemia without cystathionine beta-synthase deficiency, tyrosinemia type I, or liver disease that has_material_basis_in homozygous or compound heterozygous mutation in the GNMT gene on chromosome 6p21.
Ontology:	Human Disease [DOID:0111037]   ( DOID:0111037 )