PMID- 10487747 OWN - NLM STAT- MEDLINE DCOM- 19991104 LR - 20200204 IS - 0261-4189 (Print) IS - 0261-4189 (Linking) VI - 18 IP - 18 DP - 1999 Sep 15 TI - GRASP55, a second mammalian GRASP protein involved in the stacking of Golgi cisternae in a cell-free system. PG - 4949-60 AB - We have identified a 55 kDa protein, named GRASP55 (Golgi reassembly stacking protein of 55 kDa), as a component of the Golgi stacking machinery. GRASP55 is homologous to GRASP65, an N-ethylmaleimide-sensitive membrane protein required for the stacking of Golgi cisternae in a cell-free system. GRASP65 exists in a complex with the vesicle docking protein receptor GM130 to which it binds directly, and the membrane tethering protein p115, which also functions in the stacking of Golgi cisternae. GRASP55 binding to GM130, could not be detected using biochemical methods, although a weak interaction was detected with the yeast two-hybrid system. Cryo-electron microscopy revealed that GRASP65, like GM130, is present on the cis-Golgi, while GRASP55 is on the medial-Golgi. Recombinant GRASP55 and antibodies to the protein block the stacking of Golgi cisternae, which is similar to the observations made for GRASP65. These results demonstrate that GRASP55 and GRASP65 function in the stacking of Golgi cisternae. FAU - Shorter, J AU - Shorter J AD - Cell Biology Laboratory, Imperial Cancer Research Fund, 44 Lincoln's Inn Fields, London WC2A 3PX. FAU - Watson, R AU - Watson R FAU - Giannakou, M E AU - Giannakou ME FAU - Clarke, M AU - Clarke M FAU - Warren, G AU - Warren G FAU - Barr, F A AU - Barr FA LA - eng SI - GENBANK/AF110267 GR - Wellcome Trust/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - EMBO J JT - The EMBO journal JID - 8208664 RN - 0 (Autoantigens) RN - 0 (DNA Primers) RN - 0 (GORASP1 protein, human) RN - 0 (GORASP2 protein, human) RN - 0 (Golgi Matrix Proteins) RN - 0 (Golgin subfamily A member 2) RN - 0 (Gorasp1 protein, rat) RN - 0 (Macromolecular Substances) RN - 0 (Membrane Proteins) RN - 0 (Recombinant Proteins) SB - IM MH - Amino Acid Sequence MH - Animals MH - Autoantigens MH - Base Sequence MH - Cell-Free System MH - Cloning, Molecular MH - Cryoelectron Microscopy MH - DNA Primers/genetics MH - Golgi Apparatus/*metabolism/ultrastructure MH - Golgi Matrix Proteins MH - HeLa Cells MH - Humans MH - In Vitro Techniques MH - Macromolecular Substances MH - Membrane Proteins/*chemistry/genetics/*metabolism MH - Molecular Sequence Data MH - Protein Binding MH - Rats MH - Recombinant Proteins/chemistry/genetics/metabolism MH - Sequence Homology, Amino Acid PMC - PMC1171566 EDAT- 1999/09/16 00:00 MHDA- 1999/09/16 00:01 CRDT- 1999/09/16 00:00 PHST- 1999/09/16 00:00 [pubmed] PHST- 1999/09/16 00:01 [medline] PHST- 1999/09/16 00:00 [entrez] AID - 10.1093/emboj/18.18.4949 [doi] PST - ppublish SO - EMBO J. 1999 Sep 15;18(18):4949-60. doi: 10.1093/emboj/18.18.4949.