The GAT domain is responsible for binding of GGA proteins to several members of the ARF family including ARF1 [1] and ARF3. The GAT domain stabilises membrane bound ARF1 in its GTP bound state, by interfering with GAP proteins [2].

1. GGAs: a family of ADP ribosylation factor-binding proteins related to adaptors and associated with the Golgi complex. J. Cell Biol. 149, 81-94
2. The GGAs promote ARF-dependent recruitment of clathrin to the TGN. Cell 105, 93-102

The GAT domain is responsible for binding of GGA proteins to several members of the ARF family in
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