| GO term | GO name | GO namespace | GO def |
| GO:0004376 | glycolipid mannosyltransferase activity | molecular_function | Catalysis of the transfer of an alpha-D-mannosyl residue from GDP-mannose into lipid-linked oligosaccharide, forming an alpha-D-mannosyl-D-mannose linkage. [GOC:ai] |
| GO:0051751 | alpha-1,4-mannosyltransferase activity | molecular_function | Catalysis of the transfer of a mannose residue to an oligosaccharide, forming an alpha-(1->4) linkage. [PMID:15772281] |
| GO:0006506 | GPI anchor biosynthetic process | biological_process | The chemical reactions and pathways resulting in the formation of a glycosylphosphatidylinositol (GPI) anchor that attaches some membrane proteins to the lipid bilayer of the cell membrane. The phosphatidylinositol group is linked via the C-6 hydroxyl residue of inositol to a carbohydrate chain which is itself linked to the protein via an ethanolamine phosphate group, its amino group forming an amide linkage with the C-terminal carboxyl of the protein. Some GPI anchors have variants on this canonical linkage. [GOC:go_curators, ISBN:0198547684] |
| GO:0005789 | endoplasmic reticulum membrane | cellular_component | The lipid bilayer surrounding the endoplasmic reticulum. [GOC:mah] |
| GO:1990529 | glycosylphosphatidylinositol-mannosyltransferase I complex | cellular_component | A protein complex that is involved in the transfer of the four mannoses in the GPI-anchor precursor. In yeast S. cerevisiae this complex consists of Pbn1p and Gpi14p and in rat this complex consists of PIG-X and PIG-M. [GOC:dph, GOC:rb, PMID:15635094] |
| GO:0000030 | mannosyltransferase activity | molecular_function | Catalysis of the transfer of a mannosyl group to an acceptor molecule, typically another carbohydrate or a lipid. [GOC:ai, GOC:cjm] |