Guanine nucleotide exchange factor (GEF), which can activate some, but not all, G-alpha proteins independently of G-protein coupled receptors. Acts by exchanging bound GDP for free GTP. Plays a key role in asymmetric spindle positioning, a step for asymmetric cell division that generates cell diversity during development by activating G(i) alpha protein independently of G-protein coupled receptors. In addition to its GEF activity, it plays an essential role in cortical subcellular localization of heterotrimeric G proteins, suggesting it acts as a facilitator of G-alpha function through control of its membrane targeting and/or assembling of associated components rather than a GEF (By similarity).

Belongs to the synembryn family.

566 amino acids

MDAEHLKRLEGREAEHIPDILNEFNKKHADLLVFDSFHSDNQWHELWLAIFGILDDAQLGHLHTQCLNTVRILTRDEFSLQTNYIEHEVSQLLRLARVEASSLKLPATPDELKQQEEGQLQLQEQPSLAQSDIIAEALKCLCNLVYQSADCRRQCLRQHCLDAILKRVASSMRHPCALEYYDMKLLFLLTALEPAARTRLQIDLNGLTYMTKWLDDKLAEPSCSEEQLNIICELLKVMFNVTSAPDKSPNEYEIQSLHLTGVLRELLLRFGKMATDKERSVVTHAINLLTNISSSCLIELTLKCSNAEEQPKKAVEGVAKAKPAKCCALCFEKRNVRCLTVLLNYLRQALAQQEAEASSHELLSPVLTVLVKCSRSDRVMRHYLRQEILPPLRDVSQRPEIGQELRNHLCRFLTLPAMILRDLAAELLFVLCKEDVGRMIKYTGYGNAAGLFAKRGILDCRRVEGADYSSDSEDSDTEEYKKHQQGINPVLGCVEPKSKHNPLDDMTEEQKESEALQLVNLIEQLRQGGIVKPALIDKDGKPQPLEHILQLQEELPQQQLEQKRKT

64.5 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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