Binds calmodulin in a calcium dependent manner. May function as scaffolding or signaling protein. Interacts with CTTNBP2; this interaction may regulate dendritic spine distribution of STRN4. Activation of glutamate receptors weakens the interaction with CTTNBP2 (By similarity). Interacts with CTTNBP2NL (By similarity). CTTNBP2-binding may regulate dendritic spine distribution. Mainly expressed in brain but is also expressed at low levels in the kidney. The name 'Zinedin' probably originates from the name of the famous soccer player from Marseille (Zinedine Zidane). Belongs to the WD repeat striatin family.