Clathrin is the major protein of the polyhedral coat of coated pits and vesicles (By similarity). Mediates endocytosis and is required for a correct polar distribution of PIN auxin transporters. Clathrin triskelions, composed of 3 heavy chains and 3 light chains, are the basic subunits of the clathrin coat (By similarity). Interacts with CLC2 and TPLATE. Interacts with EDR4 (PubMed:25747881). Cytoplasmic face of coated pits and vesicles. The C-terminal third of the heavy chains forms the hub of the triskelion. This region contains the trimerization domain and the light-chain binding domain involved in the assembly of the clathrin lattice. The N-terminal seven-bladed beta-propeller is formed by WD40-like repeats, and projects inward from the polyhedral outer clathrin coat. It constitutes a major protein-protein interaction node (By similarity). Defective in bulk endocytosis as well as in internalization of prominent plasma membrane proteins. Defects in constitutive endocytic recycling of PIN auxin transporters and their polar distribution in embryos and roots leading to altered auxin distribution patterns and associated auxin transport-related phenotypes. Defective in embryonic and postembryonic development. Belongs to the clathrin heavy chain family. Was assigned to CHC1 in PubMed:21187379. Truncated N-terminus.