The product of this gene is a mitogen induced GTPase activating protein (GAP). It exhibits a specific GAP activity for Ras-related regulatory proteins Rap1 and Rap2, but not for Ran or other small GTPases. This protein may also hamper mitogen-induced cell cycle progression when abnormally or prematurely expressed. It is localized to the perinuclear region. Two alternatively spliced variants encoding the same isoform have been characterized to date. [provided by RefSeq, Jul 2008]
Function
GTPase activator activity; Rap GTPase activator activity; protein C-terminus binding; protein binding
Synonyms
SIPA1; signal-induced proliferation-associated 1; SPA1; signal-induced proliferation-associated protein 1; sipa-1; p130 SPA-1; GTPase-activating protein Spa-1; signal-induced proliferation-associated gene 1
Citations
Publication ()
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