Download MendeleyCtBP1/BARS Gly172-->Glu mutant structure: impairing NAD(H)-binding and dimerization
Nardini, M., Valente, C., Ricagno, S., Luini, A., Corda, D., Bolognesi, M.(2009) Biochem Biophys Res Commun 381: 70-74
- PubMed: 19351597
- DOI: https://doi.org/10.1016/j.bbrc.2009.02.010
- Primary Citation of Related Structures:
3GA0 - PubMed Abstract:
C-terminal binding proteins (CtBPs) are multi-functional proteins involved in nuclear transcriptional co-repression, Golgi membrane fission, and synaptic ribbon formation. Binding of NAD(H) to CtBPs promotes dimerization. CtBP dimers act as a scaffold for multimeric protein complex formation, thus bridging transcriptional repressors and their targets in the nucleus. Based on size-exclusion chromatography experiments and on the crystal structure of the NAD(H)-free G172E CtBP mutant, we show here that absence of NAD(H) induces flexibility/backbone conformational changes at the dimerization interface and at the CtBP interdomain region. The results presented shed first light on the correlation between NAD(H)-binding and functional CtBP dimerization.
Organizational Affiliation:
Department of Biomolecular Sciences and Biotechnology, CNR-INFM and CIMAINA, University of Milano, Via Celoria 26, I-20133 Milano, Italy.
