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. 1990 Aug;9(8):2375–2383. doi: 10.1002/j.1460-2075.1990.tb07412.x

Synthetic peptides of the Rab effector domain inhibit vesicular transport through the secretory pathway.

H Plutner 1, R Schwaninger 1, S Pind 1, W E Balch 1
PMCID: PMC552261  PMID: 2114975

Abstract

Synthetic peptides of the putative effector domain of members of the ras-related rab gene family of small GTP-binding proteins were synthesized and found to be potent inhibitors of endoplasmic reticulum (ER) to Golgi and intra-Golgi transport in vitro. Inhibition of transport by one of the effector domain peptides was rapid (t1/2 of 30 s), and irreversible. Analysis of the temporal site of peptide inhibition indicated that a late step in transport was blocked, coincident with a Ca2(+)-dependent prefusion step. The results provide novel biochemical evidence for the role of members of the rab gene family in vesicular transport in mammalian cells, and implicate a role for a new downstream Rab effector protein (REP) regulating vesicle fusion.

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Selected References

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