This domain is found in Lysosomal alpha-mannosidase from Bos taurus (Laman) and similar proteins from eukaryotes. This protein is necessary for the catabolism of N-linked carbohydrates released during glycoprotein turnover. Laman, which belongs to the glycoside hydrolase family 38 (GH38), is organised into four domains: the alpha-beta N-terminal Pfam:PF01074, a three-helix bundle domain Pfam:PF09261, and three mainly beta-sheet domains (covered by this entry, Pfam:PF07748 and Pfam:PF17677) [1-5].

1: Structure of Golgi alpha-mannosidase II: a target for inhibition of growth and metastasis of cancer cells. van den Elsen JM, Kuntz DA, Rose DR; EMBO J. 2001;20:3008-3017. PMID:11406577

2: The structure of bovine lysosomal alpha-mannosidase suggests a novel mechanism for low-pH activation. Heikinheimo P, Helland R, Leiros HK, Leiros I, Karlsen S, Evjen G, Ravelli R, Schoehn G, Ruigrok R, Tollersrud OK, McSweeney S, Hough E; J Mol Biol. 2003;327:631-644. PMID:12634058

3: Comparison of kifunensine and 1-deoxymannojirimycin binding to class I and II alpha-mannosidases demonstrates different saccharide distortions in inverting and retaining catalytic mechanisms. Shah N, Kuntz DA, Rose DR; Biochemistry. 2003;42:13812-13816. PMID:14636047

4: Insights into the mechanism of Drosophila melanogaster Golgi alpha-mannosidase II through the structural analysis of covalent reaction intermediates. Numao S, Kuntz DA, Withers SG, Rose DR; J Biol Chem. 2003;278:48074-48083. PMID:12960159

5: Probing the substrate specificity of Golgi alpha-mannosidase II by use of synthetic oligosaccharides and a catalytic nucleophile mutant. Zhong W, Kuntz DA, Ember B, Singh H, Moremen KW, Rose DR, Boons GJ; J Am Chem Soc. 2008;130:8975-8983. PMID:18558690