Glycerol-3-phosphate dehydrogenase 1-like protein(GPD1L) converts sn-glycerol 3-phosphate to glycerone phosphate. GPD1L is found in the cytoplasm, associated with the plasma membrane, where it binds the sodium channel, voltage-gated, type V, alpha subunit(SCN5A). Mutations in the GPD1L gene are the cause of SIDS(sudden infant death syndrome) and Brugada syndrome type 2(an autosomal dominant tachyarrhythmia).