Crystal Structure of Fadr, a Fatty Acid-Responsive Transcription Factor with a Novel Acyl Coenzyme A-Binding FoldVan Aalten, D.M.F., Dirusso, C.C., Knudsen, J., Wierenga, R.K.
(2000) EMBO J 19: 5167
- PubMed: 11013219
- DOI: 10.1093/emboj/19.19.5167
- Primary Citation of Related Structures:
- PubMed Abstract:
- Crystallization and X-Ray Diffraction Studies of the Fatty-Acid Responsive Transcription Factor Fadr from Escherichia Coli.
Van Aalten, D.M.F., Knudsen, J., Dirusso, C.C., Kokko, T., Wierenga, R.K.
(2000) Acta Crystallogr D Biol Crystallogr 56: 469
FadR is a dimeric acyl coenzyme A (acyl CoA)-binding protein and transcription factor that regulates the expression of genes encoding fatty acid biosynthetic and degrading enzymes in Escherichia coli. Here, the 2.0 A crystal structure of full-length ...
FadR is a dimeric acyl coenzyme A (acyl CoA)-binding protein and transcription factor that regulates the expression of genes encoding fatty acid biosynthetic and degrading enzymes in Escherichia coli. Here, the 2.0 A crystal structure of full-length FadR is described, determined using multi-wavelength anomalous dispersion. The structure reveals a dimer and a two-domain fold, with DNA-binding and acyl-CoA-binding sites located in an N-terminal and C-terminal domain, respectively. The N-terminal domain contains a winged helix-turn-helix prokaryotic DNA-binding fold. Comparison with known structures and analysis of mutagenesis data delineated the site of interaction with DNA. The C-terminal domain has a novel fold, consisting of a seven-helical bundle with a crossover topology. Careful analysis of the structure, together with mutational and biophysical data, revealed a putative hydrophobic acyl-CoA-binding site, buried in the core of the seven-helical bundle. This structure aids in understanding FadR function at a molecular level, provides the first structural scaffold for the large GntR family of transcription factors, which are keys in the control of metabolism in bacterial pathogens, and could thus be a possible target for novel chemotherapeutic agents.
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