Computer-Based Redesign of a β Sandwich Protein Suggests that Extensive Negative Design Is Not Required for De Novo β Sheet Design  Xiaozhen Hu, Huanchen.

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Computer-Based Redesign of a β Sandwich Protein Suggests that Extensive Negative Design Is Not Required for De Novo β Sheet Design  Xiaozhen Hu, Huanchen Wang, Hengming Ke, Brian Kuhlman  Structure  Volume 16, Issue 12, Pages 1799-1805 (December 2008) DOI: 10.1016/j.str.2008.09.013 Copyright © 2008 Elsevier Ltd Terms and Conditions

Figure 1 Sequences of the Wild-Type and Three Redesigned Proteins TEN-WT, wild-type; TEN-D1, TEN-D2, and TEN-D3, redesigned sequences. The TEN-D1 sequence is from a previously published study (Dantas et al., 2003). Structure 2008 16, 1799-1805DOI: (10.1016/j.str.2008.09.013) Copyright © 2008 Elsevier Ltd Terms and Conditions

Figure 2 One-Dimensional 1H Spectra of the Redesigned Proteins (A) TEN-D2. (B) TEN-D3. Structure 2008 16, 1799-1805DOI: (10.1016/j.str.2008.09.013) Copyright © 2008 Elsevier Ltd Terms and Conditions

Figure 3 Circular Dichroism Spectra of the Wild-Type Tenascin and the Redesigned Proteins at Neutral and Acidic pH with Different Temperatures 20°C(r) represents that the temperature was cooled back to 20°C. Structure 2008 16, 1799-1805DOI: (10.1016/j.str.2008.09.013) Copyright © 2008 Elsevier Ltd Terms and Conditions

Figure 4 Temperature and Chemical Denaturation as Monitored by Circular Dichroism (A) Thermal unfolding of wild-type tenascin and the redesigned proteins. (B) Chemical denaturation of wild-type tenascin, TEN-D2, and TEN-D3. Structure 2008 16, 1799-1805DOI: (10.1016/j.str.2008.09.013) Copyright © 2008 Elsevier Ltd Terms and Conditions

Figure 5 Structure Alignment between the Designed Model and the Crystal Structure of TEN-D3 Designed model, cyan; TEN-D3, green. (A) Backbone only. (B) Buried residues. (C) Selected surface residues. (D) A designed salt bridge between Asp48 and Arg74. Structure 2008 16, 1799-1805DOI: (10.1016/j.str.2008.09.013) Copyright © 2008 Elsevier Ltd Terms and Conditions