ACTR1B

This gene encodes a 42.3 kD subunit of dynactin, a macromolecular complex consisting of 10 subunits ranging in size from 22 to 150 kD. Dynactin binds to both microtubules and cytoplasmic dynein and is involved in a diverse array of cellular functions, including ER-to-Golgi transport, the centripetal movement of lysosomes and endosomes, spindle formation, chromosome movement, nuclear positioning, and axonogenesis. This subunit, like ACTR1A, is an actin-related protein. These two proteins, which are of equal length and share 90% amino acid identity, are present in a constant ratio of approximately 1:15 in the dynactin complex. [provided by RefSeq]

ARP1 actin-related protein 1 homolog B, centractin beta (yeast)

Component of a multi-subunit complex involved in microtubule based vesicle motility. It is associated with the centrosome.

Antigen processing and presentation of exogenous peptide antigen via MHC class II
Neutrophil degranulation

Cytoskeleton; Centrosome