3A5E
Crystal structure of 5K RNase Sa
Summary for 3A5E
| Entry DOI | 10.2210/pdb3a5e/pdb |
| Descriptor | Guanyl-specific ribonuclease Sa (2 entities in total) |
| Functional Keywords | rnase sa, 5k, disulfide bond, endonuclease, hydrolase, nuclease, secreted |
| Biological source | Streptomyces aureofaciens |
| Cellular location | Secreted: P05798 |
| Total number of polymer chains | 1 |
| Total formula weight | 10624.90 |
| Authors | Takano, K. (deposition date: 2009-08-06, release date: 2010-08-04, Last modification date: 2024-11-20) |
| Primary citation | Nick Pace, C.,Huyghues-Despointes, B.M.,Fu, H.,Takano, K.,Scholtz, J.M.,Grimsley, G.R. Urea denatured state ensembles contain extensive secondary structure that is increased in hydrophobic proteins Protein Sci., 19:929-943, 2010 Cited by PubMed Abstract: The goal of this article is to gain a better understanding of the denatured state ensemble (DSE) of proteins through an experimental and computational study of their denaturation by urea. Proteins unfold to different extents in urea and the most hydrophobic proteins have the most compact DSE and contain almost as much secondary structure as folded proteins. Proteins that unfold to the greatest extent near pH 7 still contain substantial amounts of secondary structure. At low pH, the DSE expands due to charge-charge interactions and when the net charge per residue is high, most of the secondary structure is disrupted. The proteins in the DSE appear to contain substantial amounts of polyproline II conformation at high urea concentrations. In all cases considered, including staph nuclease, the extent of unfolding by urea can be accounted for using the data and approach developed in the laboratory of Wayne Bolen (Auton et al., Proc Natl Acad Sci 2007; 104:15317-15323). PubMed: 20198681DOI: 10.1002/pro.370 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.6 Å) |
Structure validation
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