PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 27427966-3 2016 Here I review our studies on the final stages of the yeast secretory pathway that have led us to propose that adjacent Rabs on a pathway are networked to one another through their regulators; specifically we have shown that the Rab, Ypt32, in its GTP-bound form recruits both Sec2, the GEF that activates the downstream Rab, Sec4, as well as Gyp1, the GAP that inactivates the upstream Rab, Ypt1. rabs 119-123 Rab family GTPase SEC4 Saccharomyces cerevisiae S288C 325-329 17134721-4 2007 With a K(d) value for the Sec2:Sec4.GDP interaction of ca 70 microM and a maximal rate of GDP displacement of ca 15 s(-1), it is 100-1000-fold more effective than other proteins showing exchange activity towards Rabs (MSS4, DSS4, Vps9) and ca tenfold faster than Cdc25 as a Ras specific exchanger, although still 100-fold slower than the fastest systems studied so far, EF-Tu/Ef-Ts and Ran/RCC1. rabs 212-216 Rab family GTPase SEC4 Saccharomyces cerevisiae S288C 31-35