2k0q

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{{STRUCTURE_2k0q| PDB=2k0q | SCENE= }}
{{STRUCTURE_2k0q| PDB=2k0q | SCENE= }}
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'''Solution structure of CopK, a periplasmic protein involved in copper resistance in Cupriavidus metallidurans CH34'''
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===Solution structure of CopK, a periplasmic protein involved in copper resistance in Cupriavidus metallidurans CH34===
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==Overview==
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The four replicons of Cupriavidus metallidurans CH34 (the genome sequence was provided by the US Department of Energy-University of California Joint Genome Institute) contain two gene clusters putatively encoding periplasmic resistance to copper, with an arrangement of genes resembling that of the copSRABCD locus on the 2.1 Mb megaplasmid (MPL) of Ralstonia solanacearum, a closely related plant pathogen. One of the copSRABCD clusters was located on the 2.6 Mb MPL, while the second was found on the pMOL30 (234 kb) plasmid as part of a larger group of genes involved in copper resistance, spanning 17 857 bp in total. In this region, 19 ORFs (copVTMKNSRABCDIJGFLQHE) were identified based on the sequencing of a fragment cloned in an IncW vector, on the preliminary annotation by the Joint Genome Institute, and by using transcriptomic and proteomic data. When introduced into plasmid-cured derivatives of C. metallidurans CH34, the cop locus was able to restore the wild-type MIC, albeit with a biphasic survival curve, with respect to applied Cu(II) concentration. Quantitative-PCR data showed that the 19 ORFs were induced from 2- to 1159-fold when cells were challenged with elevated Cu(II) concentrations. Microarray data showed that the genes that were most induced after a Cu(II) challenge of 0.1 mM belonged to the pMOL30 cop cluster. Megaplasmidic cop genes were also induced, but at a much lower level, with the exception of the highly expressed MPL copD. Proteomic data allowed direct observation on two-dimensional gel electrophoresis, and via mass spectrometry, of pMOL30 CopK, CopR, CopS, CopA, CopB and CopC proteins. Individual cop gene expression depended on both the Cu(II) concentration and the exposure time, suggesting a sequential scheme in the resistance process, involving genes such as copK and copT in an initial phase, while other genes, such as copH, seem to be involved in a late response phase. A concentration of 0.4 mM Cu(II) was the highest to induce maximal expression of most cop genes.
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{{ABSTRACT_PUBMED_18533181}}
==About this Structure==
==About this Structure==
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2K0Q is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Cupriavidus_metallidurans Cupriavidus metallidurans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2K0Q OCA].
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2K0Q is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Cupriavidus_metallidurans Cupriavidus metallidurans]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2K0Q OCA].
==Reference==
==Reference==
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Transcriptomic and proteomic analyses of the pMOL30-encoded copper resistance in Cupriavidus metallidurans strain CH34., Monchy S, Benotmane MA, Wattiez R, van Aelst S, Auquier V, Borremans B, Mergeay M, Taghavi S, van der Lelie D, Vallaeys T, Microbiology. 2006 Jun;152(Pt 6):1765-76. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16735739 16735739]
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Molecular structure and metal-binding properties of the periplasmic CopK protein expressed in Cupriavidus metallidurans CH34 during copper challenge., Bersch B, Favier A, Schanda P, van Aelst S, Vallaeys T, Coves J, Mergeay M, Wattiez R, J Mol Biol. 2008 Jul 4;380(2):386-403. Epub 2008 May 15. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/18533181 18533181]
[[Category: Cupriavidus metallidurans]]
[[Category: Cupriavidus metallidurans]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: Open barrel]]
[[Category: Open barrel]]
[[Category: Plasmid-encoded]]
[[Category: Plasmid-encoded]]
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Revision as of 18:02, 2 July 2008

Image:2k0q.png

Template:STRUCTURE 2k0q

Solution structure of CopK, a periplasmic protein involved in copper resistance in Cupriavidus metallidurans CH34

Template:ABSTRACT PUBMED 18533181

About this Structure

2K0Q is a Single protein structure of sequence from Cupriavidus metallidurans. Full experimental information is available from OCA.

Reference

Molecular structure and metal-binding properties of the periplasmic CopK protein expressed in Cupriavidus metallidurans CH34 during copper challenge., Bersch B, Favier A, Schanda P, van Aelst S, Vallaeys T, Coves J, Mergeay M, Wattiez R, J Mol Biol. 2008 Jul 4;380(2):386-403. Epub 2008 May 15. PMID:18533181

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