AGB1 is the heterotrimeric G-protein beta subunit and is involved in organ shape. A significant fraction of the protein is found in the ER. The predicted protein has two DWD motifs. It can bind to DDB1a in Y2H assays and may be involved in the formation of a CUL4-based E3 ubiquitin ligase. It seems to be involved in the calcium-mediated response to extracellular ATP.