The YjbH adaptor protein enhances proteolysis of the transcriptional regulator Spx in Staphylococcus aureus.
Spx is a global regulator that is widespread among the low G+C Gram-positive bacteria. Spx has been extensively studied in Bacillus subtilis, where it acts as an activator and a repressor of transcription in response to disulfide stress. Under non-stress conditions, Spx is rapidly degraded by the ClpXP protease. This degradation is enhanced by the YjbH adaptor protein. Upon disulfide stress, the a
