2005/06/20 by Daniel Schlieper, María A. Oliva, José M. Andreu +1 · 5 citations
Biochemistry, Genetics and Molecular Biology · #Microtubule and mitosis dynamics #Protist diversity and phylogeny #Genomics and Chromatin Dynamics
paper · doi:10.1073/pnas.0502859102
openalex publication_date 2005/06/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/25
alphabeta-Tubulin heterodimers, from which the microtubules of the cytoskeleton are built, have a complex chaperone-dependent folding pathway. They are thought to be unique to eukaryotes, whereas the homologue FtsZ can be found in bacteria. The exceptions are BtubA and BtubB from Prosthecobacter, which have higher sequence homology to eukaryotic tubulin than to FtsZ. Here we show that some of their properties are different from tubulin, such as weak dimerization and chaperone-independent folding. However, their structure is strikingly similar to tubulin including surface loops, and BtubA/B form tubulin-like protofilaments. Presumably, BtubA/B were transferred from a eukaryotic cell by horizontal gene transfer because their high degree of similarity to eukaryotic genes is unique within the Prosthecobacter genome.