MAN1B1

Mannosidase, alpha, class 1B, member 1
PDB rendering based on 1fmi.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 1FMI​, 1FO2​, 1FO3​, 1X9D​
Identifiers
Symbols	MAN1B1 ; ERMAN1; MANA-ER; MRT15
External IDs	OMIM: 604346 MGI: 2684954 HomoloGene: 5230 ChEMBL: 2308 GeneCards: MAN1B1 Gene
EC number	3.2.1.113
Gene ontology Molecular function • mannosyl-oligosaccharide 1,2-alpha-mannosidase activity • calcium ion binding Cellular component • endoplasmic reticulum • endoplasmic reticulum membrane • Golgi apparatus • membrane • integral component of membrane • endoplasmic reticulum quality control compartment • extracellular vesicle Biological process • protein folding • protein N-linked glycosylation • N-glycan processing • oligosaccharide metabolic process • protein N-linked glycosylation via asparagine • ER-associated ubiquitin-dependent protein catabolic process • protein alpha-1,2-demannosylation • trimming of terminal mannose on B branch • post-translational protein modification • cellular protein metabolic process • glycoprotein ERAD pathway • endoplasmic reticulum mannose trimming • mannose trimming involved in glycoprotein ERAD pathway Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	11253	227619
Ensembl	ENSG00000177239	ENSMUSG00000036646
UniProt	Q9UKM7	A2AJ15
RefSeq (mRNA)	NM_016219	NM_001029983
RefSeq (protein)	NP_057303	NP_001025154
Location (UCSC)	Chr 9: 137.09 – 137.11 Mb	Chr 2: 25.33 – 25.35 Mb
PubMed search

Endoplasmic reticulum mannosyl-oligosaccharide 1,2-alpha-mannosidase is an enzyme that in humans is encoded by the MAN1B1 gene.^[1][2][3]

References

1. Gonzalez DS, Karaveg K, Vandersall-Nairn AS, Lal A, Moremen KW (Aug 1999). "Identification, expression, and characterization of a cDNA encoding human endoplasmic reticulum mannosidase I, the enzyme that catalyzes the first mannose trimming step in mammalian Asn-linked oligosaccharide biosynthesis". J Biol Chem 274 (30): 21375–86. doi:10.1074/jbc.274.30.21375. PMID 10409699.
2. Tremblay LO, Herscovics A (Nov 1999). "Cloning and expression of a specific human alpha 1,2-mannosidase that trims Man9GlcNAc2 to Man8GlcNAc2 isomer B during N-glycan biosynthesis". Glycobiology 9 (10): 1073–8. doi:10.1093/glycob/9.10.1073. PMID 10521544.
3. "Entrez Gene: MAN1B1 mannosidase, alpha, class 1B, member 1".

Further reading

• Land A, Braakman I (2001). "Folding of the human immunodeficiency virus type 1 envelope glycoprotein in the endoplasmic reticulum.". Biochimie 83 (8): 783–90. doi:10.1016/S0300-9084(01)01314-1. PMID 11530211.
• Dedera DA, Gu RL, Ratner L (1992). "Role of asparagine-linked glycosylation in human immunodeficiency virus type 1 transmembrane envelope function.". Virology 187 (1): 377–82. doi:10.1016/0042-6822(92)90331-I. PMID 1736542.
• Kalyanaraman VS, Rodriguez V, Veronese F, et al. (1990). "Characterization of the secreted, native gp120 and gp160 of the human immunodeficiency virus type 1.". AIDS Res. Hum. Retroviruses 6 (3): 371–80. doi:10.1089/aid.1990.6.371. PMID 2187500.
• Shimizu H, Tsuchie H, Honma H, et al. (1991). "Effect of N-(3-phenyl-2-propenyl)-1-deoxynojirimycin on the lectin binding to HIV-1 glycoproteins.". Jpn. J. Med. Sci. Biol. 43 (3): 75–87. doi:10.7883/yoken1952.43.75. PMID 2283726.
• Leonard CK, Spellman MW, Riddle L, et al. (1990). "Assignment of intrachain disulfide bonds and characterization of potential glycosylation sites of the type 1 recombinant human immunodeficiency virus envelope glycoprotein (gp120) expressed in Chinese hamster ovary cells.". J. Biol. Chem. 265 (18): 10373–82. PMID 2355006.
• Stein BS, Engleman EG (1990). "Intracellular processing of the gp160 HIV-1 envelope precursor. Endoproteolytic cleavage occurs in a cis or medial compartment of the Golgi complex.". J. Biol. Chem. 265 (5): 2640–9. PMID 2406237.
• Pal R, Hoke GM, Sarngadharan MG (1989). "Role of oligosaccharides in the processing and maturation of envelope glycoproteins of human immunodeficiency virus type 1.". Proc. Natl. Acad. Sci. U.S.A. 86 (9): 3384–8. doi:10.1073/pnas.86.9.3384. PMC 287137. PMID 2541446.
• Dewar RL, Vasudevachari MB, Natarajan V, Salzman NP (1989). "Biosynthesis and processing of human immunodeficiency virus type 1 envelope glycoproteins: effects of monensin on glycosylation and transport.". J. Virol. 63 (6): 2452–6. PMC 250699. PMID 2542563.
• Kozarsky K, Penman M, Basiripour L, et al. (1989). "Glycosylation and processing of the human immunodeficiency virus type 1 envelope protein.". J. Acquir. Immune Defic. Syndr. 2 (2): 163–9. PMID 2649653.
• Robinson WE, Montefiori DC, Mitchell WM (1988). "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. PMID 2829950.
• Blough HA, Pauwels R, De Clercq E, et al. (1987). "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. PMID 3099781.
• Montefiori DC, Robinson WE, Mitchell WM (1988). "Role of protein N-glycosylation in pathogenesis of human immunodeficiency virus type 1.". Proc. Natl. Acad. Sci. U.S.A. 85 (23): 9248–52. doi:10.1073/pnas.85.23.9248. PMC 282716. PMID 3264072.
• Fenouillet E, Jones I, Powell B, et al. (1993). "Functional role of the glycan cluster of the human immunodeficiency virus type 1 transmembrane glycoprotein (gp41) ectodomain.". J. Virol. 67 (1): 150–60. PMC 237347. PMID 8093218.
• Yeh JC, Seals JR, Murphy CI, et al. (1993). "Site-specific N-glycosylation and oligosaccharide structures of recombinant HIV-1 gp120 derived from a baculovirus expression system.". Biochemistry 32 (41): 11087–99. doi:10.1021/bi00092a019. PMID 8218172.
• 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. PMID 8673525.
• Hu H, Shioda T, Moriya C, et al. (1996). "Infectivities of human and other primate lentiviruses are activated by desialylation of the virion surface.". J. Virol. 70 (11): 7462–70. PMC 190813. PMID 8892864.
• 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. PMID 9109416.
• Tremblay LO, Campbell Dyke N, Herscovics A (1998). "Molecular cloning, chromosomal mapping and tissue-specific expression of a novel human alpha1,2-mannosidase gene involved in N-glycan maturation.". Glycobiology 8 (6): 585–95. doi:10.1093/glycob/8.6.585. PMID 9592125.