Involved in protein synthesis. Involved in microtubule stabilization. Interacts with the 40S and 60S ribosomal subunits. Interacts with microtubules. After induction of apoptosis or mild oxidative stress, reversibly translocates from the cytoplasm to mitochondria, where it is associated with the outer surface. Present with 27800 molecules/cell in log phase SD medium. Belongs to the TCTP family.