Structural highlights
Function
CUSF_ECOLI Part of a cation efflux system that mediates resistance to copper and silver. Binds one copper per polypeptide.[1]
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
Methionine-rich motifs have an important role in copper trafficking factors, including the CusF protein. Here we show that CusF uses a new metal recognition site wherein Cu(I) is tetragonally displaced from a Met2His ligand plane toward a conserved tryptophan. Spectroscopic studies demonstrate that both thioether ligation and strong cation-pi interactions with tryptophan stabilize metal binding. This novel active site chemistry affords mechanisms for control of adventitious metal redox and substitution chemistry.
Cu(I) recognition via cation-pi and methionine interactions in CusF.,Xue Y, Davis AV, Balakrishnan G, Stasser JP, Staehlin BM, Focia P, Spiro TG, Penner-Hahn JE, O'Halloran TV Nat Chem Biol. 2008 Feb;4(2):107-9. Epub 2007 Dec 23. PMID:18157124[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ 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
- ↑ Xue Y, Davis AV, Balakrishnan G, Stasser JP, Staehlin BM, Focia P, Spiro TG, Penner-Hahn JE, O'Halloran TV. Cu(I) recognition via cation-pi and methionine interactions in CusF. Nat Chem Biol. 2008 Feb;4(2):107-9. Epub 2007 Dec 23. PMID:18157124 doi:10.1038/nchembio.2007.57
