Acts as central component of the centromere DNA-binding protein complex CBF3, which is essential for chromosome segregation and movement of centromeres along microtubules. CBF3 is required for the recruitment of other kinetochore complexes to CEN DNA. It plays a role in the attachment of chromosomes to the spindle and binds selectively to a highly conserved DNA sequence called CDEIII, found in centromers and in several promoters. The association of CBF3C with CBF3D and SGT1 is required for CBF3C activation and CBF3 assembly. Component of the CBF3 copmplex, which is formed of CBF3A/CBF2, CBF3B/CEP3, CBF3C/CTF13 and CBF3D. CBF3C interacts with CBF3D and SGT1.