BP

GO:0007040

lysosome organization

A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of a lysosome. A lysosome is a cytoplasmic, membrane-bounded organelle that is found in most animal cells and that contains a variety of hydrolases.

IMP

BP

GO:0016256

N-glycan processing to lysosome

The modification of high-mannose N-glycans by UDP-N-acetylglucosamine-lysosomal-enzyme N-acetylglucosaminephosphotransferase and the subsequent removal of the N-acetylglucosamine residues yielding mannose-6-P that occurs in the ER-Golgi apparatus to N-glycans destined for the lysosome.

IMP

BP

GO:0033299

secretion of lysosomal enzymes

The controlled release of lysosomal enzymes by a cell.

IEA

BP

GO:0046835

carbohydrate phosphorylation

The process of introducing a phosphate group into a carbohydrate, any organic compound based on the general formula Cx(H2O)y.

IDA

CC

GO:0000139

Golgi membrane

The lipid bilayer surrounding any of the compartments of the Golgi apparatus.

IDA

CC

GO:0005794

Golgi apparatus

A compound membranous cytoplasmic organelle of eukaryotic cells, consisting of flattened, ribosome-free vesicles arranged in a more or less regular stack. The Golgi apparatus differs from the endoplasmic reticulum in often having slightly thicker membranes, appearing in sections as a characteristic shallow semicircle so that the convex side (cis or entry face) abuts the endoplasmic reticulum, secretory vesicles emerging from the concave side (trans or exit face). In vertebrate cells there is usually one such organelle, while in invertebrates and plants, where they are known usually as dictyosomes, there may be several scattered in the cytoplasm. The Golgi apparatus processes proteins produced on the ribosomes of the rough endoplasmic reticulum; such processing includes modification of the core oligosaccharides of glycoproteins, and the sorting and packaging of proteins for transport to a variety of cellular locations. Three different regions of the Golgi are now recognized both in terms of structure and function: cis, in the vicinity of the cis face, trans, in the vicinity of the trans face, and medial, lying between the cis and trans regions.

IDA

CC

GO:0016021

integral component of membrane

The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.

IEA

MF

GO:0003976

UDP-N-acetylglucosamine-lysosomal-enzyme N-acetylglucosaminephosphotransferase activity

Catalysis of the reaction: UDP-N-acetyl-D-glucosamine + lysosomal-enzyme D-mannose = UMP + lysosomal-enzyme N-acetyl-D-glucosaminyl-phospho-D-mannose.

IDA|IMP

MF

GO:0005509

calcium ion binding

Interacting selectively and non-covalently with calcium ions (Ca2+).

IEA