Format

Send to

Choose Destination
EMBO J. 1993 Jul;12(7):2847-53.

A 102 kDa subunit of a Golgi-associated particle has homology to beta subunits of trimeric G proteins.

Author information

1
Institute of Cancer Research, Chester Beatty Laboratories, London, UK.

Abstract

We have identified a 102 kDa protein, p102, which is found on the cytoplasmic face of Golgi membranes, exocytic transport vesicles and in the cytosol. A monoclonal antibody that cross-reacts with p102 is able to immunoprecipitate a 500-600 kDa protein complex containing p102 and additional subunits. The composition of this p102-containing protein complex resembles that of the Golgi coatomer complex, which constitutes the coat of non-clathrin coated vesicles. One of the subunits of the p102 complex reacts with a monoclonal antibody that detects beta-COP, a subunit of the Golgi coatomer complex. Like beta-COP, p102 exists in a brefeldin A-sensitive association with Golgi membranes. The sequence of p102 contains an N-terminal domain composed of six repeats which are similar to those found in the beta subunit of trimeric G proteins and other regulatory proteins. We suggest that p102 may be involved in regulating membrane traffic in the constitutive exocytic pathway.

PMID:
8335000
PMCID:
PMC413536
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Wiley Icon for PubMed Central
Loading ...
Support Center