Clathrin is the major protein of the polyhedral coat of coated pits and vesicles. Acts as component of the TACC3/ch-TOG/clathrin complex proposed to contribute to stabilization of kinetochore fibers of the mitotic spindle by acting as inter-microtubule bridge (By similarity). Clathrin coats are formed from molecules containing 3 heavy chains and 3 light chains. Interacts with CALY; the interaction stimulates clathrin self-assembly and clathrin-mediated endocytosis (By similarity). Interacts with CKAP5 and TACC3 forming the TACC3/ch-TOG/clathrin complex located at spindle inter-microtubules bridges; the complex implicates clathrin triskelions (By similarity). Cytoplasmic face of coated pits and vesicles. In complex with TACC3 and CKAP5 (forming the TACC3/ch-TOG/clathrin complex) localized to inter-microtubule bridges in mitotic spindles. Belongs to the clathrin light chain family.