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Clathrin interactor 1 (CLINT1), also known as enthoprotin or epsin-4, belongs to the epsin family of endocytic adapter proteins. CLINT1 interacts with clathrin, the adapter protein AP-1 and phosphoinositides. It may have a role in the formation of clathrin coated vesicles and trafficking between the trans-Golgi network and endosomes. Mutations in the gene of CLINT1 are associated with a susceptibility to schizophrenia and psychotic disorders. Calculated molecular weight of CLINT1 is 68 kDa. The migration of endogenous CLINT1 at 80 kDa has also been reported (PMID: 12213833; 15811338).