Alternative titles and symbols : 5-oxoprolinuria due to 5-oxoprolinase deficiency;
Description : 5-Oxoprolinuria can be caused by genetic defects in either of 2 enzymes involved in
the gamma-glutamyl cycle of glutathione metabolism: glutathione synthetase (GSS; 601002)
or 5-oxoprolinase (OPLAH; 614243). GSS deficiency (266130) is best characterized as
an inborn error of glutathione metabolism, but there is debate as to whether OPLAH
deficiency represents a disorder or simply a biochemical condition with no adverse
clinical effects because patients lack a consistent clinical picture apart from 5-oxoprolinuria
(summary by Calpena et al., 2013).;