5dd8

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The Crystal structure of HucR mutant (HucR-E48Q) from Deinococcus radiodurans

Structural highlights

5dd8 is a 2 chain structure with sequence from Deinococcus radiodurans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.05Å
Ligands:CL
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q9RV71_DEIRA

Publication Abstract from PubMed

Therapeutic strategies have been reported that depend on synthetic network devices in which a urate-sensing transcriptional regulator detects pathological levels of urate and triggers production or release of urate oxidase. The transcription factor involved, HucR, is a member of the multiple antibiotic resistance (MarR) protein family. We show that protonation of stacked histidine residues at the pivot point of long helices that form the scaffold of the dimer interface leads to reversible formation of a molten globule state and significantly attenuated DNA binding at physiological temperatures. We also show that binding of urate to symmetrical sites in each protein lobe is communicated via the dimer interface. This is the first demonstration of regulation of a MarR family transcription factor by pH-dependent interconversion between a molten globule and a compact folded state. Our data further suggest that HucR may be utilized in synthetic devices that depend on detection of pH changes.

Histidine switch controlling pH-dependent protein folding and DNA binding in a transcription factor at the core of synthetic network devices.,Deochand DK, Perera IC, Crochet RB, Gilbert NC, Newcomer ME, Grove A Mol Biosyst. 2016 Jul 19;12(8):2417-26. doi: 10.1039/c6mb00304d. PMID:27282811[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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See Also

References

  1. Deochand DK, Perera IC, Crochet RB, Gilbert NC, Newcomer ME, Grove A. Histidine switch controlling pH-dependent protein folding and DNA binding in a transcription factor at the core of synthetic network devices. Mol Biosyst. 2016 Jul 19;12(8):2417-26. doi: 10.1039/c6mb00304d. PMID:27282811 doi:http://dx.doi.org/10.1039/c6mb00304d

Contents


PDB ID 5dd8

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