Clathrin-binding domain of Huntingtin-interacting protein 1
HIP1_clath_bdg is the coiled-coil region of Huntington-interacting proteins 1. It carries a highly conserved HADLLRKN sequence motif at its N-terminus which effects the binding of HIP1R to clathrin light-chain EED regulatory site. this binding then stimulates clathrin lattice assembly. Huntingtin-interacting protein 1 (HIP1) is an obligate binding partner for Huntungtin, and loss of this interaction triggers the cascade of events that results in the apoptosis of neuronal cells and the onset of Hungtinton's disease. Clathrin light-chain binds to a flexible coiled-coil domain in HIP1 and induces a compact state that is refractory to actin binding.