28
May
Downstream are overlapping binding sites for Sec15p and Ypt32p-GTP, which compete against each other to hole to Sec2p. of Sec2p, adjacent to the PI(4)P binding site, and that addition of PI(4)P inhibits Sec2p phosphorylation by Yck2p. Loss of Yck1p and Yck2p function leads to accumulation of an intracellular pool of the secreted glucanase Bgl2p, as well as to accumulation of Golgi-related structures in the cytoplasm. We propose that Sec2p is phosphorylated after it has been recruited to secretory vesicles and the level of PI(4)P continues to be reduced. p32 Inhibitor M36 This promotes Sec2p function by stimulating its interaction with…