Clathrin is the major protein of the polyhedral coat of coated pits and vesicles. In yeast, it is involved in the retention of proteins in an intracellular membrane compartment, presumably the trans-Golgi. The yeast light chain is important for cell growth. The light chain may help to properly orient the assembly/ disassembly of the clathrin coats. Clathrin coats are formed from molecules containing 3 heavy chains and 3 light chains. Interacts with the auxilin-like clathrin uncoating factor SWA2. Cytoplasmic face of coated pits and vesicles. CLC1 binds calcium, and calmodulin in presence of calcium. Present with 3490 molecules/cell in log phase SD medium. Belongs to the clathrin light chain family.