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TitleMolecular basis for control of antibiotic production by a bacterial hormone.
Journal, issue, pagesNature, Vol. 590, Issue 7846, Page 463-467, Year 2021
Publish dateFeb 3, 2021
AuthorsShanshan Zhou / Hussain Bhukya / Nicolas Malet / Peter J Harrison / Dean Rea / Matthew J Belousoff / Hariprasad Venugopal / Paulina K Sydor / Kathryn M Styles / Lijiang Song / Max J Cryle / Lona M Alkhalaf / Vilmos Fülöp / Gregory L Challis / Christophe Corre /
PubMed AbstractActinobacteria produce numerous antibiotics and other specialized metabolites that have important applications in medicine and agriculture. Diffusible hormones frequently control the production of ...Actinobacteria produce numerous antibiotics and other specialized metabolites that have important applications in medicine and agriculture. Diffusible hormones frequently control the production of such metabolites by binding TetR family transcriptional repressors (TFTRs), but the molecular basis for this remains unclear. The production of methylenomycin antibiotics in Streptomyces coelicolor A3(2) is initiated by the binding of 2-alkyl-4-hydroxymethylfuran-3-carboxylic acid (AHFCA) hormones to the TFTR MmfR. Here we report the X-ray crystal structure of an MmfR-AHFCA complex, establishing the structural basis for hormone recognition. We also elucidate the mechanism for DNA release upon hormone binding through the single-particle cryo-electron microscopy structure of an MmfR-operator complex. DNA binding and release assays with MmfR mutants and synthetic AHFCA analogues define the role of individual amino acid residues and hormone functional groups in ligand recognition and DNA release. These findings will facilitate the exploitation of actinobacterial hormones and their associated TFTRs in synthetic biology and in the discovery of new antibiotics.
External linksNature / PubMed:33536618
MethodsEM (single particle) / X-ray diffraction
Resolution1.5 - 4.2 Å
Structure data

EMDB-20781:
Structural basis for control of antibiotic production by bacterial hormones
Method: EM (single particle) / Resolution: 4.2 Å

PDB-6srn:
Structural basis for control of antibiotic production by bacterial hormones
Method: X-RAY DIFFRACTION / Resolution: 1.5 Å

PDB-7ky1:
Molecular basis for control of antibiotic production by a bacterial hormones
Method: X-RAY DIFFRACTION / Resolution: 1.50003347687 Å

Chemicals

ChemComp-LUB:
4-(Hydroxymethyl)-2-propylfuran-3-carboxylic acid

ChemComp-GOL:
GLYCEROL

ChemComp-HOH:
WATER

Source
  • Streptomyces coelicolor A3(2) (bacteria)
  • streptomyces coelicolor (bacteria)
KeywordsANTIBIOTIC / streptomyces / tetR-family transcriptional regulator / signalling / microbial natural product

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