JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Crystallization and preliminary crystallographic analysis of the global nitrogen regulator AmtR from Corynebacterium glutamicum.

AmtR, a member of the TetR family of transcription regulators, is a global regulator of nitrogen control in Corynebacterium glutamicum. Unlike other TetR-family members, which are regulated by small-molecule effectors, AmtR is regulated by a protein called GlnK. It has been shown that a GlnK trimer has to become adenylylated prior to formation of a complex with AmtR. The physiological function of AmtR has been very well studied, but structural characterization of the mechanistic aspects of AmtR-regulated transcription has yet to be accomplished. AmtR has successfully been crystallized in space group P2(1)2(1)2, with six molecules in the asymmetric unit and unit-cell parameters a = 153.34, b = 163.10, c = 51.93 angstrom . Preliminary phases were obtained using Se-SAD.

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