Two residues in the T-loop of GlnK determine NifL-dependent nitrogen control of nif gene expression.

Abstract excerpt

X-ray crystallographic analysis of the Escherichia coli P(II) protein paralogues GlnB and GlnK has shown that they share a superimposable structural core but can differ in conformation of the T-loop, a region of the protein (residues 37-54) that has been shown to be important for interaction with other proteins. In Klebsiella pneumoniae GlnK has been shown to have a clearly defined function in regulating...

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