GORASP2

This gene encodes a member of the Golgi reassembly stacking protein family. These proteins may play a role in the stacking of Golgi cisternae and Golgi ribbon formation, as well as Golgi fragmentation during apoptosis or mitosis. The encoded protein also plays a role in the intracellular transport of transforming growth factor alpha and may function as a molecular chaperone. A pseudogene of this gene is located on the short arm of chromosome 2. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene.

Full Name

golgi reassembly stacking protein 2

Function

Plays a role in the assembly and membrane stacking of the Golgi cisternae, and in the process by which Golgi stacks reform after breakdown during mitosis and meiosis (PubMed:10487747, PubMed:21515684, PubMed:22523075).

May regulate the intracellular transport and presentation of a defined set of transmembrane proteins, such as transmembrane TGFA (PubMed:11101516).

Required for normal acrosome formation during spermiogenesis and normal male fertility, probably by promoting colocalization of JAM2 and JAM3 at contact sites between germ cells and Sertoli cells (By similarity).

Mediates ER stress-induced unconventional (ER/Golgi-independent) trafficking of core-glycosylated CFTR to cell membrane (PubMed:21884936, PubMed:27062250, PubMed:28067262).

Biological Process

Cell differentiation Source: UniProtKB-KW
Establishment of protein localization to plasma membrane Source: UniProtKB
Golgi organization Source: GO_Central
Organelle assembly Source: UniProtKB
Organelle organization Source: UniProtKB
Response to endoplasmic reticulum stress Source: UniProtKB
Spermatogenesis Source: UniProtKB-KW

Cellular Location

Endoplasmic reticulum membrane; Golgi apparatus membrane; Golgi apparatus. Detected in the intermediate Golgi, membrane-associated (By similarity). ER stress triggers its relocalization from Golgi to ER membrane (PubMed:27062250, PubMed:28067262).

PTM

Myristoylated (PubMed:11101516). Myristoylation is essential for the Golgi targeting (By similarity).
Palmitoylated.
Phosphorylated in mitotic cells (PubMed:11408587). ER stress-induced phosphorylation at Ser-441 induces monomerization and subsequent relocalization from Golgi to ER which is essential for mediating unconventional (ER/Golgi-independent) trafficking of CFTR to the cell membrane (PubMed:21884936, PubMed:27062250).