Related ArticlesElectrostatic recognition in redox copper proteins: a 1H NMR study of the protonation behavior of His 19 in oxidized and reduced Cu,Zn superoxide dismutase.
Arch Biochem Biophys. 1993 Mar;301(2):244-50
Authors: Desideri A, Polticelli F, Falconi M, Sette M, Ciriolo MR, Paci M, Rotilio G
The pK shift of the His 19 residue in bovine Cu,Zn superoxide dismutase was carefully measured by nuclear magnetic resonance spectroscopy as a function of the change of the copper oxidation state. The measured pK values were identical within experimental error, at variance with results obtained with other copper proteins under similar conditions. The DelPhi program, based on a macroscopic dielectric model for the electrostatic interactions in proteins, was used to calculate pK shifts, as a function of charge perturbation introduced by metal oxidation, between the oxidized and the reduced enzyme, which are assumed to have the same structure on the basis of previous spectroscopic data. A nice fit with the experimental pK values was obtained protonating the imidazole of the copper-zinc bridging His 61, which is known to release the copper in the reduced enzyme. Protonation of His 61 in the reduced state gives rise to an electrostatic potential distribution around the protein almost identical to that observed in the oxidized one. These results suggest that a major role for the bridging histidine in Cu,Zn superoxide dismutase is to provide identical electrostatic steering of the substrate in the two oxidation states of the enzyme by redox-linked protonation-deprotonation processes. This property is discussed in comparison with the effect of copper reduction on the distribution of the electric field in small blue copper proteins.
Protonation, Tautomerization, and Rotameric Structure of Histidine: A Comprehensive Study by Magic-Angle-Spinning Solid-State NMR.
Protonation, Tautomerization, and Rotameric Structure of Histidine: A Comprehensive Study by Magic-Angle-Spinning Solid-State NMR.
Protonation, Tautomerization, and Rotameric Structure of Histidine: A Comprehensive Study by Magic-Angle-Spinning Solid-State NMR.
J Am Chem Soc. 2011 Jan 5;
Authors: Li S, Hong M
Histidine structure and chemistry lie at the heart of many enzyme active sites, ion channels, and metalloproteins. While solid-state NMR spectroscopy has been used to study histidine chemical shifts, the full pH dependence of the...
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Protonation, Tautomerization, and Rotameric Structure of Histidine: A Comprehensive Study by Magic-Angle-Spinning Solid-State NMR
Protonation, Tautomerization, and Rotameric Structure of Histidine: A Comprehensive Study by Magic-Angle-Spinning Solid-State NMR
Shenhui Li and Mei Hong
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja108943n/aop/images/medium/ja-2010-08943n_0010.gif
Journal of the American Chemical Society
DOI: 10.1021/ja108943n
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA
http://feeds.feedburner.com/~r/acs/jacsat/~4/FuFM0C9qHyE
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[NMR paper] A NMR study of the interaction of a three-domain construct of ATP7A with copper(I) and copper(I)-HAH1: the interplay of domains.
A NMR study of the interaction of a three-domain construct of ATP7A with copper(I) and copper(I)-HAH1: the interplay of domains.
Related Articles A NMR study of the interaction of a three-domain construct of ATP7A with copper(I) and copper(I)-HAH1: the interplay of domains.
J Biol Chem. 2005 Nov 18;280(46):38259-63
Authors: Banci L, Bertini I, Cantini F, Chasapis CT, Hadjiliadis N, Rosato A
ATP7A is a P-type ATPase involved in copper(I) homeostasis in humans. It possesses a long N-terminal tail protruding into the cytosol and containing six...
[NMR paper] Study of electrostatic potential surface distribution of wild-type plastocyanin Synec
Study of electrostatic potential surface distribution of wild-type plastocyanin Synechocystis solution structure determined by homonuclear NMR.
Related Articles Study of electrostatic potential surface distribution of wild-type plastocyanin Synechocystis solution structure determined by homonuclear NMR.
Biopolymers. 2003 Oct;70(2):212-20
Authors: Monleón D, Celda B
Plastocyanin is a small (approximately 10 kDa), type I blue copper protein that works as an electron donor to photosystem I from cytochrome f in both chloroplast systems and in some...
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[NMR paper] A simple protocol to study blue copper proteins by NMR.
A simple protocol to study blue copper proteins by NMR.
Related Articles A simple protocol to study blue copper proteins by NMR.
Eur J Biochem. 2003 Feb;270(4):600-9
Authors: Gelis I, Katsaros N, Luchinat C, Piccioli M, Poggi L
In the case of oxidized plastocyanin from Synechocystis sp. PCC6803, an NMR approach based on classical two and three dimensional experiments for sequential assignment leaves unobserved 14 out of 98 amino acids. A protocol which simply makes use of tailored versions of 2D HSQC and 3D CBCA(CO)NH and CBCANH leads to the...
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[NMR paper] Solid-state 13C NMR study of tyrosine protonation in dark-adapted bacteriorhodopsin.
Solid-state 13C NMR study of tyrosine protonation in dark-adapted bacteriorhodopsin.
Related Articles Solid-state 13C NMR study of tyrosine protonation in dark-adapted bacteriorhodopsin.
Biochemistry. 1990 Jun 12;29(23):5567-74
Authors: Herzfeld J, Das Gupta SK, Farrar MR, Harbison GS, McDermott AE, Pelletier SL, Raleigh DP, Smith SO, Winkel C, Lugtenburg J
Solid-state 13C MAS NMR spectra were obtained for dark-adapted bacteriorhodopsin (bR) labeled with Tyr. Difference spectra (labeled minus natural abundance) taken at pH values between 2 and...
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[NMR paper] pH-dependent redox activity and fluxionality of the copper site in amicyanin from Thi
pH-dependent redox activity and fluxionality of the copper site in amicyanin from Thiobacillus yersutus as studied by 300- and 600- MHz 1H NMR.
Related Articles pH-dependent redox activity and fluxionality of the copper site in amicyanin from Thiobacillus yersutus as studied by 300- and 600- MHz 1H NMR.
J Biol Chem. 1990 Feb 15;265(5):2768-74
Authors: Lommen A, Canters GW
The kinetics of the deuteronation of one of the copper ligand histidines of the reduced Type I blue-copper protein amicyanin from Thiobacillus versutus was studied as a...
Electrostatic recognition in redox copper proteins: a 1H NMR study of the protonation
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