9SZ7

CryoEM structure of MraZ in complex with 4 box promoter from Mycoplasma genitalium

Summary for 9SZ7

• Entry DOI: 10.2210/pdb9sz7/pdb
• EMDB information: 55361
• Descriptor: Transcriptional regulator MraZ, DNA (47-MER), DNA (48-MER), ... (7 entities in total)
• Functional Keywords: mraz, transcription factor, dna binding protein
• Biological source: Mycoplasmoides genitalium; More
• Total number of polymer chains: 16
• Total formula weight: 246719.10

Authors

Reverter, D.,Sanchez-Alba, L.,Durand, A. (deposition date: 2025-10-14, release date: 2026-02-04, Last modification date: 2026-03-18)

Primary citation

Sanchez-Alba, L.,Varejao, N.,Durand, A.,Garcia-Pardo, J.,Carreras-Caballe, M.,Amador, V.,Pinyol, J.,Reverter, D.
Structural basis for transcriptional regulation by the cell division regulator MraZ in Mycoplasma genitalium.
Nat Commun, 17:-, 2026

PubMed Abstract: Cell division is a central process in all living organisms and requires the coordinated action of many proteins and regulatory elements. In most bacteria, the division and cell wall (dcw) gene cluster is regulated by the first gene of the dcw operon, mraZ, a highly conserved DNA-binding transcriptional regulator. Here we report the structural basis of MraZ transcriptional regulation by the resolution of three different cryo-EM structures of MraZ in complex with the upstream promoter region of the dcw cluster from Mycoplasma genitalium at 3.36, 3.57 and 3.87 Å resolution. The structures reveal the specific interactions between MraZ DNA-binding motif and nucleobases of the binding boxes, which induces distortion in the MraZ octamer to enable the interaction with the four repetitive binding boxes of the promoter DNA. The "cradle-like" DNA-binding motif of MraZ exposes three highly conserved basic residues, Lys13, Arg15 and Arg86, which are essential for binding to the consensus sequence of its cognate promoter. Ultimately, the mechanism behind MraZ's DNA binding and regulation of the dcw operon could be translated to other species, working as a general mechanism for the regulation of dcw gene cluster in bacteria.

PubMed: 41611686
DOI: 10.1038/s41467-026-68809-2

Experimental method

ELECTRON MICROSCOPY (3.87 Å)