3GFI

Crystal structure of ST1710 complexed with its promoter DNA

Summary for 3GFI

• Entry DOI: 10.2210/pdb3gfi/pdb
• Related: 2eb7 2yr2 3GFJ 3GFL 3GFM 3gez 3gf2
• Descriptor: 146aa long hypothetical transcriptional regulator, 5'-D(*TP*AP*AP*CP*AP*AP*TP*AP*GP*CP*AP*AP*A)-3', 5'-D(*TP*TP*GP*CP*TP*AP*TP*TP*GP*T)-3', ... (4 entities in total)
• Functional Keywords: transcription regulator, st1710, marr, dna-binding, transcription, transcription regulation, transcription-dna complex, structural genomics, nppsfa, national project on protein structural and functional analyses, riken structural genomics/proteomics initiative, rsgi, transcription/dna
• Biological source: Sulfolobus tokodaii
• Total number of polymer chains: 4
• Total formula weight: 40776.78

Authors

Kumarevel, T.,Tanaka, T.,Yokoyama, S.,RIKEN Structural Genomics/Proteomics Initiative (RSGI) (deposition date: 2009-02-26, release date: 2009-08-25, Last modification date: 2024-03-20)

Primary citation

Kumarevel, T.,Tanaka, T.,Umehara, T.,Yokoyama, S.
ST1710-DNA complex crystal structure reveals the DNA binding mechanism of the MarR family of regulators.
Nucleic Acids Res., 37:4723-4735, 2009

PubMed Abstract: ST1710, a member of the multiple antibiotic resistance regulator (MarR) family of regulatory proteins in bacteria and archaea, plays important roles in development of antibiotic resistance, a global health problem. Here, we present the crystal structure of ST1710 from Sulfolobus tokodaii strain 7 complexed with salicylate, a well-known inhibitor of MarR proteins and the ST1710 complex with its promoter DNA, refined to 1.8 and 2.10 A resolutions, respectively. The ST1710-DNA complex shares the topology of apo-ST1710 and MarR proteins, with each subunit containing a winged helix-turn-helix (wHtH) DNA binding motif. Significantly large conformational changes occurred upon DNA binding and in each of the dimeric monomers in the asymmetric unit of the ST1710-DNA complex. Conserved wHtH loop residues interacting with the bound DNA and mutagenic analysis indicated that R89, R90 and K91 were important for DNA recognition. Significantly, the bound DNA exhibited a new binding mechanism.

PubMed: 19509310
DOI: 10.1093/nar/gkp496

Experimental method

X-RAY DIFFRACTION (2.1 Å)