Download MendeleyStructures of Mycobacterium tuberculosis DosR and DosR-DNA complex involved in gene activation during adaptation to hypoxic latency.
Wisedchaisri, G., Wu, M., Rice, A.E., Roberts, D.M., Sherman, D.R., Hol, W.G.J.(2005) J Mol Biology 354: 630-641
- PubMed: 16246368 Search on PubMed
- DOI: https://doi.org/10.1016/j.jmb.2005.09.048
- Primary Citation Related Structures:
1ZLJ, 1ZLK - PubMed Abstract:
On encountering low oxygen conditions, DosR activates the transcription of 47 genes, promoting long-term survival of Mycobacterium tuberculosis in a non-replicating state. Here, we report the crystal structures of the DosR C-terminal domain and its complex with a consensus DNA sequence of the hypoxia-induced gene promoter. The DosR C-terminal domain contains four alpha-helices and forms tetramers consisting of two dimers with non-intersecting dyads. In the DNA-bound structure, each DosR C-terminal domain in a dimer places its DNA-binding helix deep into the major groove, causing two bends in the DNA. DosR makes numerous protein-DNA base contacts using only three amino acid residues per subunit: Lys179, Lys182, and Asn183. The DosR tetramer is unique among response regulators with known structures.
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.
Organizational Affiliation:
