Cab45 is required for Ca(2+)-dependent secretory cargo sorting at the trans-Golgi network
Cab45 is required for Ca(2+)-dependent secretory cargo sorting at the trans-Golgi network
Citació
- von Blume J, Alleaume AM, Kienzle C, Carreras-Sureda A, Valverde M, Malhotra V. Cab45 is required for Ca(2+)-dependent secretory cargo sorting at the trans-Golgi network. J Cell Biol. 2012;199(7):1057-66. DOI: 10.1083/jcb.201207180
Enllaç permanent
Descripció
Resum
Ca(2+) import into the lumen of the trans-Golgi network (TGN) by the secretory pathway calcium ATPase1 (SPCA1) is required for the sorting of secretory cargo. How is Ca(2+) retained in the lumen of the Golgi, and what is its role in cargo sorting? We show here that a soluble, lumenal Golgi resident protein, Cab45, is required for SPCA1-dependent Ca(2+) import into the TGN; it binds secretory cargo in a Ca(2+)-dependent reaction and is required for its sorting at the TGN.