Enables anion binding activity; enzyme binding activity; and glycine dehydrogenase (decarboxylating) activity. Involved in glycine decarboxylation via glycine cleavage system and protein-containing complex assembly. Located in mitochondrion. Part of glycine cleavage complex. Human ortholog(s) of this gene implicated in glycine encephalopathy. Orthologous to human GLDC (glycine decarboxylase). [provided by Alliance of Genome Resources, Apr 2022]