Arp3 Recombinant Rabbit Monoclonal Antibody [JB33-44]

Function

Actin polymerization is required for a variety of cell functions, including chemotaxis, cell migration, cell adhesion, and platelet activation. Cells trigger actin polymerization through either the de novo nucleation of filaments from monomeric actin, the severing of existing filaments to create uncapped barbed ends, or the uncapping existing barbed ends. The nucleation of actin is a rate-limiting and unfavorable reaction in actin polymerization and therefore requires the involvement of the Arp2/3 complex, which helps create new filaments and promotes the end-to-side cross-linking of actin filaments into the branching meshwork. The Arp2/3 complex consists of the actin-related proteins Arp2 and Arp3, and various other accessory proteins. The Arp2/3 complex promotes actin nucleation by binding the pointed end of actin filaments, or by associating with the side of an existing filament, and nucleates growth in the barbed direction. In addition, the Arp2/3 complex also mediates actin cytoskeletal outgrowths that are regulated by the Rho family of small GTPases. In response to GTP-binding Cdc42, the Arp2/3 complex binds the Cdc42 substrates, namely the WASP proteins, and initiates the formation of lamellipodia and filopodia.

Background References

1. Welch M D et al. Actin polymerization is induced by Arp2/3 protein complex at the surface of Listeria monocytogenes. Nature 385:265-269 (1997).

2. Kim J et al. Functional genomic screen for modulators of ciliogenesis and cilium length. Nature 464:1048-1051 (2010).

Sequence Similarity

Belongs to the actin family. ARP3 subfamily.

Subcellular Location

Cell projection, Cytoplasm, Cytoskeleton, Nucleus.

UNIPROT

SwissProt: P61158 Human

SwissProt: Q99JY9 Mouse

SwissProt: Q4V7C7 Rat

Synonyms

Actin like protein 3 antibody

Actin related protein 3 antibody

ACTR3 antibody

ARP3 actin related protein 3 homolog (yeast) antibody