Golgin subfamily A member 5(GOLGA5) is a golgi apparatus membrane protein, highly expressed in seminiferous tubules and Leydig cells in testis. It is highly phosphorylated during mitosis. GOLGA5 is involved in maintaining Golgi structure and intra-Golgi retrograde transport. It stimulates the formation of Golgi stacks and ribbons. Defects in GOLGA5 are a cause of thyroid papillary carcinoma (TPC).
Background References
1. "The coiled-coil membrane protein golgin-84 is a novel rab effector required for Golgi ribbon formation."Diao A., Rahman D., Pappin D.J.C., Lucocq J., Lowe M.J. Cell Biol. 160:201-212(2003)
2. "Golgin tethers define subpopulations of COPI vesicles."Malsam J., Satoh A., Pelletier L., Warren G.Science 307:1095-1098(2005)
Tissue Specificity
Ubiquitous. Highly expressed in seminiferous tubules and Leydig cells in testis, and detected at much lower levels in the other tissues tested. Expression is very low or not detectable in spermatozoa.
Post-translational Modification
Highly phosphorylated during mitosis. Phosphorylation is barely detectable during interphase.