A protein complex which is capable of GTPase activator activity. [ http://www.ncbi.nlm.nih.gov/pubmed/16449187 GOC:TermGenie GOC:bhm http://purl.obolibrary.org/obo/go/references/0000088 ]
Term information
An example of this is BFA1 in Saccharomyces cerevisiae (P47113) in PMID:16449187 (inferred from direct assay).