Prostaglandin-H2 D-isomerase (PTGDS)

Catalyzes the conversion of PGH2 to PGD2, a prostaglandin involved in smooth muscle contraction/relaxation and a powerful inhibitor of platelet aggregation. Involved in a variety of CNS functions, such as sedation, NREM sleep and PGE2-induced allodynia, and may have an anti-apoptotic part in oligodendrocytes.

Binds little non-substrate lipophilic molecules, such as biliverdin, bilirubin, retinal, retinoic acid and thyroid gland, and may act as a scavenger for harmful hydrophopic molecules and as a secretory retinoid and thyroid hormone transporter. Possibly involved in development and maintenance of the blood-brain, blood-retina, blood-aqueous comedy and blood-testis barrier.