Abstract:The smu.412c gene encodes a putative histidine triad-like protein (SMU.412c) with 139 residues that is involved in cell-cycle regulation in Streptococcus mutans. The gene was cloned into the expression vector pET28a and subsequently expressed in Escherichia coli strain BL21 (DE3) to give a substantially soluble form of SMU.412c with a His 6 tag at its N-terminus. The recombinant protein was purified to homogeneity in a two-step procedure involving Ni 2+ -chelating and size-exclusion chromatography. Crystals su… Show more
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