The GATE-16 protein participates in intra-Golgi transport and can associate with the N-ethylmaleimide-sensitive fusion protein and with Golgi SNAREs. The yeast ortholog of GATE-16 is the autophagocytosis factor Aut7p. GATE-16 is also closely related ...
The GATE-16 protein participates in intra-Golgi transport and can associate with the N-ethylmaleimide-sensitive fusion protein and with Golgi SNAREs. The yeast ortholog of GATE-16 is the autophagocytosis factor Aut7p. GATE-16 is also closely related to the GABA receptor-associated protein (GABARAP), which has been proposed to cluster neurotransmitter receptors by mediating interaction with the cytoskeleton, and to the light chain-3 subunit of the neuronal microtubule-associated protein complex. Here, we present the crystal structure of GATE-16 refined to 1.8 A resolution. GATE-16 contains a ubiquitin fold decorated by two additional N-terminal helices. Proteins with strong structural similarity but no detectable sequence homology to GATE-16 include Ras effectors that mediate diverse downstream functions, but each interacts with Ras by forming pseudo-continuous beta-sheets. The GATE-16 surface suggests that it binds its targets in a similar manner. Moreover, a second potential protein-protein interaction site on GATE-16 may explain the adapter activity observed for members of the GATE-16 family.
Related Citations:
Isolation and Characterization of a Novel Low Molecular Weight Protein Involved in Intra-Golgi Traffic Legesse-Miller, A.,Sagiv, Y.,Porat, A.,Elazar, Z. (1998) J.Biol.Chem. 273: 3105
GATE-16, a Membrane Transport Modulator Interacts with NSF and the Golgi v-SNARE GOS-28 Sagiv, Y.,Legesse-Miller, A.,Porat, A.,Elazar, Z. (2000) Embo J. 19: 1494
Organizational Affiliation:
Department of Structural Biology and Biological Chemistry, Weizmann Institute of Science, Rehovot, Israel.
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