Adaptor Related Protein Complex 2 Beta 1 (AP2b1)

AP2b1 is one of two large chain components of the assembly protein complex 2, which serves to link clathrin to receptors in coated vesicles. The encoded protein is found on the cytoplasmic face of coated vesicles in the plasma membrane. Two transcript variants encoding different isoforms have been found for this gene.

The beta adaptin subunit of the clathrin coat assembly complex, also referred to as AP2-beta, was cloned from human, rat and bovine cDNA libraries by Ponnambalam et al. (1990), who found that the predicted 937-amino acid proteins are totally conserved between species.Druck et al. (1995) used a probe from the 3-prime UTR of the human cDNA to map the gene to chromosome 17. Hybrids with portions of chromosome 17 were then used to localize CLAPB1 to 17q11.2-q12.