GM130/GOLGA2 Proteins and Enzymes

Golgi Matrix Protein (GM130) is peripheral cytoplamic protein that is bound to the Golgi membranes. It has been implicated as a maintainer of cis-Golgi structure (1). During mitosis, it regulates the disassembly and reassembly of the Golgi complex. It is also linked to docking and fusion of coatomer (COP I) coated vesicles to the Golgi membrane (2). The COOH-terminal domain of GM130 is highly homologous to Golgi human auto-antigen, golgin-95. GM130 interacts specifically and GTP-dependent manner with Rab1b protein, a regulator of anterograde traffic between ER and Golgi membranes (3). GM130 is also activator of YSK1, an essential player in cell migration.