Domain:Consists of a large core fragment , the amino-terminal portion , and a small headpiece , the C-terminal portion. The headpiece can bind but cannot bundle actin filaments. ,Domain:Contains at least two actin-binding sites , one in the headpiece domain and one in the amino-terminal portion. ,Function:Actin-bundling protein. May function in mitogen-activated protein kinase pathway. ,PTM:Actin-bundling activity is abolished upon phosphorylation by cAMP-dependent protein kinase. ,PTM:The N-terminus is blocked. ,similarity:Belongs to the villin/gelsolin family. ,similarity:Contains 1 HP (headpiece) domain. ,subunit:Exists in solution as a trimer of two short isoforms and one long isoform linked by disulfide bonds (Probable) . Interacts with RASGRF2. ,tissue specificity:Heart , brain , lung , skeletal muscle , and kidney. ,
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