May function as a specific light chain of unconventional myosin-10 (MYO10), also enhances MYO10 translation, possibly by acting as a chaperone for the emerging MYO10 heavy chain protein. May compete with calmodulin by binding, with different affinities, to cellular substrates. . This is the function of CALML3 (calmodulin like 3, Ensembl gene identifier ENSG00000178363).