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Purification, crystallization and preliminary X‐ray analysis of SGR6054, a

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The mycobacterial integration host factor (mIHF) is a small nonspecific DNA‐binding protein that is essential for the growth of Mycobacterium smegmatis. mIHF homologues are widely distributed among Actinobacteria, and a Streptomyces homologue of mIHF is involved in control of sporulation and antibiotic production in S. coelicolor A3(2). Despite their important biological functions, a structure of mIHF or its homologues has not been elucidated to date. Here, the S. griseus mIHF homologue (SGR6054) was expressed and purified from Escherichia coli and crystallized in the presence of a 16‐mer duplex DNA by the sitting‐drop vapour‐diffusion method. The plate‐shaped crystal belonged to space group C2, with unit‐cell parameters a = 88.53, b = 69.35, c = 77.71 Å, β = 96.63°, and diffracted X‐rays to 2.22 Å resolution.
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Document Type: Research Article

Publication date: September 1, 2012

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