Blocks the elongation and depolymerization of the actin filaments at the pointed end. The Tmod/TM complex contributes to the formation of the short actin protofilament, which in turn defines the geometry of the membrane skeleton (By similarity).
Singleton, Rouhi, Zois, Haider, Li, Kessler, Cao, Harris: "Hypoxic regulation of RIOK3 is a major mechanism for cancer cell invasion and metastasis." in: Oncogene, (2014) (PubMed).