This domain family is found in eukaryotes, and is typically between 182 and 199 amino acids in length. The family is found in association with Pfam:PF02985. There is a single completely conserved residue R that may be functionally important. Tubulin folding cofactor D does not co-polymerise with microtubules either in vivo or in vitro, but instead modulates microtubule dynamics by sequestering beta-tubulin from GTP-bound alphabeta-heterodimers in microtubules.

1: Tubulin folding cofactor D is a microtubule destabilizing protein. Martin L, Fanarraga ML, Aloria K, Zabala JC; FEBS Lett. 2000;470:93-95. PMID:10722852