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YB-1 promotes microtubule assembly in vitro through interaction with tubulin and microtubules

Abstract : BACKGROUND: YB-1 is a major regulator of gene expression in eukaryotic cells. In addition to its role in transcription, YB-1 plays a key role in translation and stabilization of mRNAs.RESULTS: We show here that YB-1 interacts with tubulin and microtubules and stimulates microtubule assembly in vitro. High resolution imaging via electron and atomic force microscopy revealed that microtubules assembled in the presence of YB-1 exhibited a normal single wall ultrastructure and indicated that YB-1 most probably coats the outer microtubule wall. Furthermore, we found that YB-1 also promotes the assembly of MAPs-tubulin and subtilisin-treated tubulin. Finally, we demonstrated that tubulin interferes with RNA:YB-1 complexes.CONCLUSION: These results suggest that YB-1 may regulate microtubule assembly in vivo and that its interaction with tubulin may contribute to the control of mRNA translation
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(2008) YB-1 promotes microtubu...
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Konstantin G. Chernov, Alain Mechulam, Nadezhda Popova, David Pastre, Elena Nadezhdina, et al.. YB-1 promotes microtubule assembly in vitro through interaction with tubulin and microtubules. BMC Biochemistry, BioMed Central, 2008, 9 (1), pp.23. ⟨10.1186/1471-2091-9-23⟩. ⟨hal-02166798⟩



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