Rrp2, a σ 54 -Dependent Transcriptional Activator of Borrelia burgdorferi , Activates rpoS in an Enhancer-Independent Manner

Abstract
Rrp2 is the sole σ54-dependent transcriptional activator present in the Borrelia burgdorferi genome. We showed that recombinant Rrp2 binds to DNA in a sequence-nonspecific manner. During infection, Rrp2 activates σ54-dependent rpoS expression without an apparent upstream enhancer element commonly associated with other σ54-dependent transcriptional activators.