Mannosidase Alpha Class 2b Member 1 (MAN2B1) Antibody – Rabbit Polyclonal

This gene encodes an enzyme that hydrolyzes terminal, non-reducing alpha-D-mannose residues in alpha-D-mannosides. Its activity is necessary for the catabolism of N-linked carbohydrates released during glycoprotein turnover and it is member of family 38 of glycosyl hydrolases. The full length protein is processed in two steps. First, a 49 aa leader sequence is cleaved off and the remainder of the protein is processed into 3 peptides of 70 kDa, 42 kDa (D) and 13/15 kDa (E). Next, the 70 kDa peptide is further processed into three peptides (A, B and C). The A, B and C peptides are disulfide-linked. Defects in this gene have been associated with lysosomal alpha-mannosidosis. Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Mar 2010]

MAN2B1: Necessary for the catabolism of N-linked carbohydrates released during glycoprotein turnover. Cleaves all known types of alpha-mannosidic linkages. Defects in MAN2B1 are the cause of lysosomal alpha- mannosidosis (AM). AM is a lysosomal storage disease characterized by accumulation of unbranched oligosaccharide chains. This accumulation is expressed histologically as cytoplasmic vacuolation predominantly in the CNS and parenchymatous organs. Depending on the clinical findings at the age of onset, a severe infantile (type I) and a mild juvenile (type II) form of alpha-mannosidosis are recognized. There is considerable variation in the clinical expression with mental retardation, recurrent infections, impaired hearing and Hurler- like skeletal changes being the most consistent abnormalities. Belongs to the glycosyl hydrolase 38 family.

Protein type: EC 3.2.1.24; Glycan Metabolism - other glycan degradation; Hydrolase

Chromosomal Location of Human Ortholog: 19p13.13

Cellular Component: extracellular space; lysosomal lumen

Molecular Function: alpha-mannosidase activity

Biological Process: mannose metabolic process; oligosaccharide catabolic process; protein deglycosylation; protein modification process

Disease: Mannosidosis, Alpha B, Lysosomal