Structural study of the response regulator HupR from Rhodobacter capsulatus. Electron microscopy of two-dimensional crystals on a nickel-chelating lipid.

Abstract

Two-dimensional crystals of the histidine-tagged-HupR protein, a transcriptional regulator from the photosynthetic bacterium Rhodobacter capsulatus, were obtained upon specific interaction with a Ni2+-chelated lipid monolayer. HupR is a response regulator of the NtrC family; it activates the transcription of the structural genes, hupSLC, of the [NiFe… (More)

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