Please use this identifier to cite or link to this item: https://doi.org/10.1107/S1744309109037476
Title: Crystal optimization and preliminary diffraction data analysis of the Smad1 MH1 domain bound to a palindromic SBE DNA element
Authors: Baburajendran, N.
Palasingam, P.
Ng, C.K.L.
Jauch, R.
Kolatkar, P.R. 
Keywords: Smad-binding element
Smad1 MH1 domain
Issue Date: 2009
Citation: Baburajendran, N., Palasingam, P., Ng, C.K.L., Jauch, R., Kolatkar, P.R. (2009). Crystal optimization and preliminary diffraction data analysis of the Smad1 MH1 domain bound to a palindromic SBE DNA element. Acta Crystallographica Section F: Structural Biology and Crystallization Communications 65 (11) : 1105-1109. ScholarBank@NUS Repository. https://doi.org/10.1107/S1744309109037476
Abstract: The bone morphogenetic protein (BMP) signalling pathway regulates diverse processes such as cell differentiation, anterior/posterior axis specification, cell growth and the formation of extra-embryonic tissues. The transcription factor Smad1 relays the BMP signal from the cytoplasm to the nucleus, where it binds short DNA-sequence motifs and regulates gene expression. However, how Smad1 selectively targets particular genomic regions is poorly understood. In order to understand the physical basis of the specific interaction of Smad1 with DNA and to contrast it with the highly homologous but functionally distinct Smad3 protein, the DNA-binding Mad-homology 1 (MH1) domain of Smad1 was cocrystallized with a 17-mer palindromic Smad-binding element (SBE). The extensive optimizations of the length, binding-site spacing and terminal sequences of the DNA element in combination with the other crystallization parameters necessary for obtaining diffraction-quality crystals are described here. A 2.7 Å resolution native data set was collected at the National Synchrotron Radiation Research Centre, Taiwan, from crystals grown in a solution containing 0.2 M ammonium tartrate dibasic, 20% PEG 3350, 3% 2 - propanol and 10% glycerol. The data set was indexed and merged in space group P222, with unit-cell parameters a = 73.94, b = 77.49, c = 83.78 Å, = β = = 90°. The solvent content in the unit cell is consistent with the presence of two Smad1 MH1 molecules bound to the duplex DNA in the asymmetric unit. © 2009 International Union of Crystallography. All rights reserved.
Source Title: Acta Crystallographica Section F: Structural Biology and Crystallization Communications
URI: http://scholarbank.nus.edu.sg/handle/10635/113182
ISSN: 17443091
DOI: 10.1107/S1744309109037476
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