Structural highlights
Function
[CUER_ECOLI] Regulates the transcription of the copA and cueO genes. It detects cytoplasmic copper stress and activates transcription in response to increasing copper concentrations.[1] [2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The earliest of a series of copper efflux genes in Escherichia coli are controlled by CueR, a member of the MerR family of transcriptional activators. Thermodynamic calibration of CueR reveals a zeptomolar (10(-21) molar) sensitivity to free Cu+, which is far less than one atom per cell. Atomic details of this extraordinary sensitivity and selectivity for +1transition-metal ions are revealed by comparing the crystal structures of CueR and a Zn2+-sensing homolog, ZntR. An unusual buried metal-receptor site in CueR restricts the metal to a linear, two-coordinate geometry and uses helix-dipole and hydrogen-bonding interactions to enhance metal binding. This binding mode is rare among metalloproteins but well suited for an ultrasensitive genetic switch.
Molecular basis of metal-ion selectivity and zeptomolar sensitivity by CueR.,Changela A, Chen K, Xue Y, Holschen J, Outten CE, O'Halloran TV, Mondragon A Science. 2003 Sep 5;301(5638):1383-7. PMID:12958362[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Outten FW, Outten CE, Hale J, O'Halloran TV. Transcriptional activation of an Escherichia coli copper efflux regulon by the chromosomal MerR homologue, cueR. J Biol Chem. 2000 Oct 6;275(40):31024-9. PMID:10915804 doi:http://dx.doi.org/10.1074/jbc.M006508200
- ↑ Outten FW, Huffman DL, Hale JA, O'Halloran TV. The independent cue and cus systems confer copper tolerance during aerobic and anaerobic growth in Escherichia coli. J Biol Chem. 2001 Aug 17;276(33):30670-7. Epub 2001 Jun 8. PMID:11399769 doi:http://dx.doi.org/10.1074/jbc.M104122200
- ↑ Changela A, Chen K, Xue Y, Holschen J, Outten CE, O'Halloran TV, Mondragon A. Molecular basis of metal-ion selectivity and zeptomolar sensitivity by CueR. Science. 2003 Sep 5;301(5638):1383-7. PMID:12958362 doi:http://dx.doi.org/10.1126/science.1085950
