1q08: Difference between revisions
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[[Image:1q08.gif|left|200px]] | [[Image:1q08.gif|left|200px]] | ||
'''Crystal structure of the Zn(II) form of E. coli ZntR, a zinc-sensing transcriptional regulator, at 1.9 A resolution (space group P212121)''' | {{Structure | ||
|PDB= 1q08 |SIZE=350|CAPTION= <scene name='initialview01'>1q08</scene>, resolution 1.90Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene> and <scene name='pdbligand=MG:MAGNESIUM ION'>MG</scene> | |||
|ACTIVITY= | |||
|GENE= ZNTR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli]) | |||
}} | |||
'''Crystal structure of the Zn(II) form of E. coli ZntR, a zinc-sensing transcriptional regulator, at 1.9 A resolution (space group P212121)''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1Q08 is a [ | 1Q08 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q08 OCA]. | ||
==Reference== | ==Reference== | ||
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:[http:// | 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:[http://www.ncbi.nlm.nih.gov/pubmed/12958362 12958362] | ||
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: zn(ii)-responsive regulator of znta]] | [[Category: zn(ii)-responsive regulator of znta]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 13:31:21 2008'' | ||
Revision as of 11:31, 20 March 2008
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| 1q08, resolution 1.90Å | |||||||||||||
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| Ligands: | PO4, ZN and MG | ||||||||||||
| Gene: | ZNTR (Escherichia coli) | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
Crystal structure of the Zn(II) form of E. coli ZntR, a zinc-sensing transcriptional regulator, at 1.9 A resolution (space group P212121)
Overview
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.
About this Structure
1Q08 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
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
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