iduronidase, α-L-
Identifiers
Symbol	IDUA
Entrez	3425
HUGO	5391
OMIM	252800
RefSeq	NM_000203
UniProt	P35475
Other data
EC number	3.2.1.76
Locus	Chr. 4 p16.3

Iduronidase is an enzyme involved in the degeneration of glycosaminoglycans such as dermatan sulfate and heparan sulfate. It is found in the lysosomes of cells.

Pathology

Its deficiency is associated with mucopolysaccharidoses (MPS). MPS, a lysosomal storage disease, is typed I through VII. Type I is know as Hurler syndrome and type I,S is known as Scheie syndrome, which has a milder prognosis compared to Hurlers. The glycosaminoglycans accumulate in the lysosomes and cause substantial disease in many different tissues of the body.

The defective alpha-L-iduronidase results in an accumulation of heparin and dermatin sulfate within phagocytes, endothelium, smooth muscle cells, neurons, and fibroblasts. Underneath electron microscopy these structure present as laminated structures, Zebra bodies.

Prenatal diagnosis of this enzyme deficiency is possible.

External links

• MeSH Iduronidase