Beta-mannosidase (EC3.2.1.25, mannanase, mannase, beta-D-mannosidase, beta-mannoside mannohydrolase, exo-beta-D-mannanase, lysosomal beta A mannosidase) is an enzyme with systematic namebeta-D-mannoside mannohydrolase, which is in humans encoded by the MANBAgene.[5][6][7][8][9][10] This enzyme catalyses the following chemical reaction
Hydrolysis of terminal, non-reducing beta-D-mannose residues in beta-D-mannosides
This gene encodes a member of the glycosyl hydrolase 2 family. The encoded protein localizes to the lysosome where it is the final exoglycosidase in the pathway for N-linked glycoprotein oligosaccharide catabolism. Mutations in this gene are associated with beta-mannosidosis, a lysosomal storage disease that has a wide spectrum of neurological involvement.[5]
^Adams, M.; Richtmyer, N.K.; Hudson, C.S. (1943). "Some enzymes present in highly purified invertase preparations; a contribution to the study of fructofuranosidases, galactosidases, glucosidases and mannosidases". J. Am. Chem. Soc. 65 (7): 1369–1380. doi:10.1021/ja01247a029. {{cite journal}}: Unknown parameter |last-author-amp= ignored (|name-list-style= suggested) (help)
Overview of all the structural information available in the PDB for UniProt: Q8K2I4 (Mouse Beta-mannosidase) at the PDBe-KB.
Further reading
Bolmstedt A, Sjölander S, Hansen JE, et al. (1996). "Influence of N-linked glycans in V4-V5 region of human immunodeficiency virus type 1 glycoprotein gp160 on induction of a virus-neutralizing humoral response". J. Acquir. Immune Defic. Syndr. Hum. Retrovirol. 12 (3): 213–20. doi:10.1097/00042560-199607000-00001. PMID8673525.
Papandreou MJ, Fenouillet E (1997). "Effect of various glycosidase treatments on the resistance of the HIV-1 envelope to degradation". FEBS Lett. 406 (1–2): 191–5. doi:10.1016/S0014-5793(97)00273-1. PMID9109416.
Gao J, Arbman G, He L, et al. (2008). "MANBA polymorphism was related to increased risk of colorectal cancer in Swedish but not in Chinese populations". Acta Oncol. 47 (3): 372–8. doi:10.1080/02841860701644052. PMID17899454.
Robinson WE, Montefiori DC, Mitchell WM (1987). "Evidence that mannosyl residues are involved in human immunodeficiency virus type 1 (HIV-1) pathogenesis". AIDS Res. Hum. Retroviruses. 3 (3): 265–82. doi:10.1089/aid.1987.3.265. PMID2829950.
Blough HA, Pauwels R, De Clercq E, et al. (1986). "Glycosylation inhibitors block the expression of LAV/HTLV-III (HIV) glycoproteins". Biochem. Biophys. Res. Commun. 141 (1): 33–8. doi:10.1016/S0006-291X(86)80330-8. PMID3099781.