DNA-binding protein HupB

UniProtKB accession:  P9WMK7

Grouped By:  Matching UniProtKB accession

UniProtKB description:  A nucleoid-associated protein (NAP) that probably plays a role in chromosome compactation. Binds DNA non-specifically, with greater affinity for supercoiled than linear DNA, binds well to nicked DNA, gapped and cruciform DNA. Has a preference for A:T rich DNA (PubMed:20824060, PubMed:10645441). Required for activation of the mtbB operon. Binds the mtbB promoter in the presence of iron, binding is seen with as little as 25 uM Fe(2+) and increases with increasing Fe(2+) (PubMed:24610707). RNase E and HupB jointly contribute to cellular adaptation to changing growth conditions and survival during antibiotic treatment and in the host (PubMed:35521527). Plays a role in stress survival (PubMed:36071978). Stimulates supercoiling relaxation by topoisomerase 1 (Top1, topA) (By similarity).