Mucolipidosis III

Definition:

Mucolipidosis type III (MLIII), or pseudo-Hurler polydystrophy, is an autosomal recessive disorder affecting lysosomal hydrolase trafficking. The clinical phenotype is variable, and some MLIII patients survive to adulthood. MLIII is caused by the deficiency of GlcNac-1-phosphotransferase, that exists as a heterohexamer comprising three subunits, alpha, beta, and gamma. It is encoded by two distinct genes, GNPTAB and GNPTG.

References:

[1]. Emanuele Persichetti, et al. Identification and molecular characterization of six novel mutations in the UDP-N-acetylglucosamine-1-phosphotransferase gamma subunit (GNPTG) gene in patients with mucolipidosis III gamma. Hum Mutat. 2009 Jun;30(6):978-84. [Content Brief]

[2]. Mariko Kudo, et al. Mucolipidosis II (I-cell disease) and mucolipidosis IIIA (classical pseudo-hurler polydystrophy) are caused by mutations in the GlcNAc-phosphotransferase alpha / beta -subunits precursor gene. Am J Hum Genet. 2006 Mar;78(3):451-63. [Content Brief]

[3]. Richard A Steet, et al. A splicing mutation in the alpha/beta GlcNAc-1-phosphotransferase gene results in an adult onset form of mucolipidosis III associated with sensory neuropathy and cardiomyopathy. Am J Med Genet A. 2005 Feb 1;132A(4):369-75. [Content Brief]

[4]. Ruth Bargal, et al. When Mucolipidosis III meets Mucolipidosis II: GNPTA gene mutations in 24 patients. Mol Genet Metab. 2006 Aug;88(4):359-63. [Content Brief]

[5]. Thomas Dierks, et al. Molecular basis of multiple sulfatase deficiency, mucolipidosis II/III and Niemann-Pick C1 disease - Lysosomal storage disorders caused by defects of non-lysosomal proteins. Biochim Biophys Acta. 2009 Apr;1793(4):710-25. [Content Brief]

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