Profilin is an ubiquitous small (12-15 kDa) phosphoinositides and poly-L-proline binding protein that plays a role in both signal transduction pathways and actin filament dynamics. There are two mammalian profilins with similar biochemical properties but different expression patterns. Profilin I appears to be highly expressed in most tissues except for skeletal muscle. Profilin II is predominantly expressed in brain and at lower levels in skeletal muscle, uterus and kidney. Profilin is a mainly cytosolic protein with higher concentrations in dynamic membrane areas like the leading edge and ruffling membranes.
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Protein Aliases: actin binding protein; Epididymis tissue protein Li 184a; Profilin I; Profilin-1
Gene Aliases: ALS18; Pfn; PFN1