The following text describes a protein:
Function:
Phosphatidylinositol 3,4,5-trisphosphate-dependent GTPase-activating protein that modulates actin cytoskeleton remodeling by regulating ARF and RHO family members. Activated by phosphatidylinositol 3,4,5-trisphosphate (PtdIns(3,4,5)P3) binding and, to a lesser extent, by phosphatidylinositol 3,4-bisphosphate (PtdIns(3,4)P2) binding. Has a preference for ARF1 and ARF5. Positively regulates the ring size of circular dorsal ruffles and promotes macropinocytosis. Acts as a bridging factor in osteoclasts to control actin and membrane dynamics (By similarity). Regulates the condensing of osteoclast podosomes into sealing zones which segregate the bone-facing membrane from other membrane domains and are required for osteoclast resorption activity (By similarity). Also regulates recruitment of the AP-3 complex to endosomal membranes and trafficking of lysosomal membrane proteins to the ruffled membrane border of osteoclasts to modulate bone resorption (By similarity). Regulates the endocytic trafficking of EGFR. Regulates the incorporation of CD63 and CD9 into multivesicular bodies. Required in the retinal pigment epithelium (RPE) for photoreceptor survival due to its role in promoting RPE phagocytosis (By similarity).
Subcellular Localization:
Cytoplasm. Golgi apparatus, trans-Golgi network. Golgi apparatus, Golgi stack. Cell membrane; Peripheral membrane protein. Endosome, multivesicular body. Cell projection, ruffle. Cell projection, podosome. Early endosome. Note=Associated with Golgi stacks in resting cells. Throughout the cytoplasm and in surface protrusions in cells that are in the process of attaching to a surface and spreading. Localizes to actin-rich podosomes, sealing zones and early endosomes in osteoclasts (By similarity).
Domain:
The first PH domain, PH 1, interacts with PtdIns(3,4,5)P3 which stimulates ARAP1 GTPase-activating activity and is also required for ARAP1-mediated regulation of endocytic trafficking of EGFR. It does not mediate PtdIns(3,4,5)P3-dependent recruitment of ARAP1 to membranes although this may be mediated by other PH domains.
Sequence:
MAEAGDAALSVAEWLRALHLEQYTGLFEQHGLVWATECQGLSDTRLMDMGMLLPGHRRRILAGLLRAHTSPAPAPRPTPRPVPMKRHIFRSPPVPATPPEPLPTTTEDEGLPAAPPIPPRRSCLPPTCFTTPSTAAPDPVLPPLPAKRHLAELSVPPVPPRTGPPRLLVSLPTKEEESLLPSLSSPPQPQSEEPLSTLPQGPPQPPSPPPCPPEIPPKPVRLFPEFDDSDYDEVPEEGPGAPARVMTKKEEPPPSRVPRAVRVASLLSEGEELSGDDQGDEEEDDHAYEGVPNGGWHTSSLSLSLPSTIAAPHPMDGPPGGSTPVTPVIKAGWLDKNPPQGSYIYQKRWVRLDTDHLRYFDSNKDAYSKRFISVACISHVAAIGDQKFEVITNNRTFAFRAESDVERKEWMQALQQAMAEQRARARLSSAYLLGVPGSEQPDRAGSLELRGFKNKLYVAVVGDKVQLYKNLEEYHLGIGITFIDMSVGNVKEVDRRSFDLTTPYRIFSFSADSELEKEQWLEAMQGAIAEALSTSEVAERIWAAAPNRFCADCGAPQPDWASINLCVVICKRCAGEHRGLGAGVSKVRSLKMDRKVWTETLIELFLQLGNGAGNRFWAANVPPSEALQPSSSPSTRRCHLEAKYREGKYRRYHPLFGNQEELDKALCAAVTTTDLAETQALLGCGAGINCFSGDPEAPTPLALAEQAGQTLQMEFLRNNRTTEVPRLDSMKPLEKHYSVVLPTVSHSGFLYKTASAGKLLQDRRAREEFSRRWCVLGDGVLSYFENERAVTPNGEIRASEIVCLAVPPPDTHGFEHTFEVYTEGERLYLFGLESAEQAHEWVKCIAKAFVPPLAEDLLARDFERLGRLPYKAGLSLQRAQEGWFSLSGSELRAVFPEGPCEEPLQLRKLQELSIQGDSENQVLVLVERRRTLYIQGERRLDFMGWLGAIQKAAASMGDTLSEQQLGDSDIPVIVYRCVDYITQCGLTSEGIYRKCGQTSKTQRLLESLRQDARSVHLKEGEQHVDDVSSALKRFLRDLPDGLFTRAQRLTWLEASEIEDEEEKVSRYRELLVRLPPVNRATVKALISHLYCVQCFSDTNQMNVHNLAIVFGPTLFQTDGQDYKAGRVVEDLINHYVVVFSVDEEELRKQREEITAIVKMRVAGTASGTQHAGDFICTVYLEEKKAETEQHIKVPASMTAEELTLEILDRRNVGIREKDYWTCFEVNEREEAERPLHFAEKVLPILHGLGTDSHLVVKKHQAMEAMLLYLASRVGDTKHGMMKFREDRSLLGLGLPSGGFHDRYFILNSSCLRLYKEVRSQRPWSGAPETSHRPEKEWPIKSLKVYLGVKKKLRPPTCWGFTVVHETEKHEKQQWYLCCDTQMELREWFATFLFVQHDGLVWPSEPSRVSRAVPEVRLGSVSLIPLRGSENEMRRSVAAFTADPLSLLRNV