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I6034

Sigma-Aldrich

α-L-Iduronidase human

recombinant, expressed in mouse NSO cells

Synonym(s):

IDUA

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About This Item

Enzyme Commission number:
UNSPSC Code:
12352204
NACRES:
NA.54

recombinant

expressed in mouse NSO cells

Quality Level

form

solution

specific activity

≥7,500 units/μg protein

mol wt

83 kDa

impurities

≤1.0 EU/μg Endotoxin

shipped in

wet ice

storage temp.

−20°C

General description

α-L-Iduronidase (IDUA) is mapped to human chromosome 4p16.3. The mature IDUA protein is glycosylated and comprises triosephosphate isomerase (TIM) barrel domain, β-sandwich, helix-loop-helix region and an immunoglobin-like domain. α-L-Iduronidase is classified under glycoside hydrolase (GH) family 39.

Application

α-L-Iduronidase may be used for leukocyte assay in the study of a-L-Iduronidase deficiency in new born.

Biochem/physiol Actions

In lysosomal degradation process α-L-Iduronidase plays a crucial role. It hydrolyzes the non-reducing terminal α-L-iduronic acid residues in glycosaminoglycans (GAGs), including dermatan sulfate and heparan sulfate.
Mutation in the α-L-Iduronidase is implicated in Mucopolysaccharidosis I (MPS I) . This enzyme defect leades to accumulation of dermatan and heparan sulfate . MPS I pathophysiology is accompanied with deformation of the skull, mental retardation and hernias.
Catalyzes the hydrolysis of unsulfated α-L-iduronosidic linkages in dermatan sulfate

Physical properties

Expressed as C-terminal histine-tagged protein (residues 1-653) with a caluclated molecular mass of 71 kDa migrating at ~83 kDa under SDS-PAGE reducing conditions.

Unit Definition

One unit will produce 1 picomole of 4-methylumbelliferone from 4-methylumbelliferyl-α-L-iduronide per minute at pH 3.5 at 25 °C.

Physical form

Supplied as a solution in 40 mM sodium acetate , 400 mM NaCl and 20% (v/v) glycerol, pH 5.0

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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Human kidney alpha-L-iduronidase: purification and characterization.
L H Rome et al.
Archives of biochemistry and biophysics, 189(2), 344-353 (1978-08-01)
Vassili Valayannopoulos et al.
Rheumatology (Oxford, England), 50 Suppl 5, v49-v59 (2012-01-11)
Better understanding of disease pathophysiology, improved supportive care and availability of disease-specific treatments for some of the mucopolysaccharidosis (MPS) disorders have greatly improved the outlook for patients with MPS disorders. Optimal management of these multisystemic disorders involves a multidisciplinary team
Francesca Gatto et al.
Stem cells and development, 21(9), 1466-1477 (2012-01-28)
Mucopolysaccharidosis type I (MPS IH; Hurler syndrome) is a rare genetic disorder that is caused by mutations in the α-L-iduronidase (IDUA) gene, resulting in the deficiency of IDUA enzyme activity and intra-cellular accumulation of glycosaminoglycans. A characteristic skeletal phenotype is
Xu He et al.
Plant molecular biology, 79(1-2), 157-169 (2012-03-24)
Processes associated with late events of N-glycosylation within the plant Golgi complex are a major limitation to the use of plant-based systems to produce recombinant pharmaceutical proteins for parenteral administration. Specifically, sugars added to the N-glycans of a recombinant protein
Patricia I Dickson et al.
Molecular genetics and metabolism, 106(1), 68-72 (2012-03-10)
Intrathecal enzyme replacement therapy is an experimental option to treat central nervous system disease due to lysosomal storage. Previous work shows that MPS I dogs receiving enzyme replacement with recombinant human alpha-l-iduronidase into the cisterna magna showed normal brain glycosaminoglycan

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