Adaptin (AP) are proteins which mediate the formation of vescicles by clathrin-coated pits. The AP-2 complex is a heterotetramer composed of 2 large AP: AP-α or AP-γ and AP-β, a medium-size AP: AP-μ and small AP: AP-σ. AP complexes connect proteins and lipids to clathrin budding sites. There are different AP complexes in mammals.[1]

3D structures of adaptin

Adaptin 3D structures


Structure of Adaptin core: AP-α-2 (cyan), AP-β-1 (magenta), AP-μ-1 (green), AP-σ-1 (olive) complex with inositole hexakisphosphate (PDB entry 2vgl)

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ReferencesReferences

  1. 1.0 1.1 Collins BM, McCoy AJ, Kent HM, Evans PR, Owen DJ. Molecular architecture and functional model of the endocytic AP2 complex. Cell. 2002 May 17;109(4):523-35. PMID:12086608

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