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Title: Protein preparation, crystallization and preliminary X-ray crystallographic analysis of Smu.1475c from caries pathogen Streptococcus mutans. Author: Zhou YF, Mi W, Li L, Zhang X, Liang YH, Su XD, Wei S. Journal: Biochim Biophys Acta; 2006 Feb; 1764(2):324-6. PubMed ID: 16427820. Abstract: The gene smu.1475c encodes a putative protein of 211 residues in Streptococcus mutans, a primary pathogen for human dental caries. In this work, smu.1475c was cloned into pET28a and expressed in good amount from the E. coli strain BL21 (DE3). Smu.1475c protein was purified to homogeneity in a two-step procedure of Ni2+ chelating and size exclusion chromatography. Crystals were obtained by hanging-drop vapor-diffusion method and diffracted to 2.7 angstroms resolution. The crystal belongs to orthorhombic space group P2(1)2(1)2(1) with cell dimension of a = 68.3 angstroms, b = 105.9 angstroms, c = 136.2 angstroms. The asymmetric unit is expected to contain four molecules with solvent content of 49.4%.[Abstract] [Full Text] [Related] [New Search]