scholarly journals Direct structural information for the copper site of dopamine β-mono-oxygenase obtained by using extended X-ray-absorption fine structure

1984 ◽  
Vol 221 (2) ◽  
pp. 545-548 ◽  
Author(s):  
S S Hasnain ◽  
G P Diakun ◽  
P F Knowles ◽  
N Binsted ◽  
C D Garner ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Superoxide Dismutase ◽  
Fine Structure ◽  
Structural Information ◽  
Bovine Erythrocyte ◽  
X Ray ◽  
Absorption Fine ◽  
Copper Site ◽  
Erythrocyte Superoxide Dismutase ◽  
X Ray Absorption

Copper K-edge e.x.a.f.s (extended X-ray-absorption fine structure) was measured for dopamine beta-mono-oxygenase in aqueous solution. Comparison with the Cu K-edge e.x.a.f.s. of bovine erythrocyte superoxide dismutase shows a close resemblance. Detailed analysis of the e.x.a.f.s. indicates that the copper atom is bound to four imidazole groups at 0.201 nm with one or two oxygen atoms at 0.23 nm.

scholarly journals An extended-X-ray-absorption-fine-structure study of bovine erythrocyte superoxide dismutase in aqueous solution. Direct evidence for three-co-ordinate Cu(I) in reduced enzyme

1984 ◽  
Vol 219 (3) ◽  
pp. 985-990 ◽  
Author(s):  
N J Blackburn ◽  
S S Hasnain ◽  
N Binsted ◽  
G P Diakun ◽  
C D Garner ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Superoxide Dismutase ◽  
Structure Study ◽  
Reduced Form ◽  
Edge Structure ◽  
X Ray ◽  
Absorption Fine ◽  
Copper Site ◽  
Erythrocyte Superoxide Dismutase ◽  
X Ray Absorption

Copper and zinc K-edge e.x.a.f.s. (extended X-ray-absorption fine structures) were measured for the metal sites of oxidized and reduced bovine superoxide dismutase in aqueous solution. Detailed analysis of the spectra indicates that the copper site of the enzyme changes on reduction and is most probably co-ordinated to three imidazole groups at a shorter distance Cu-N(alpha) = 0.194 nm (1.94 A) in the reduced form compared with a co-ordination of four imidazole groups at 0.199 nm (1.99 A) and an oxygen atom from solvent water at 0.224 nm (2.24 A) in the oxidized form. Examination of the edge, near-edge structure and e.x.a.f.s. of the zinc sites indicates that the stereochemical changes at copper that accompany reduction introduce minimal perturbation on the stereochemistry at zinc.

Scandium(III) hydration in aqueous solution from X-ray diffraction and X-ray absorption fine structure measurements

1997 ◽  
Vol 274 (5-6) ◽  
pp. 485-490 ◽  
Author(s):  
Toshio Yamaguchi ◽  
Mami Niihara ◽  
Toshiyuki Takamuku ◽  
Hisanobu Wakita ◽  
Hitoshi Kanno
Keyword(s):  
Aqueous Solution ◽  
Fine Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Reproducibility Tests of Extended X-Ray Absorption Fine Structure for Aqua and Ammine Complexes of First Transition Metals in Solid and Aqueous Solution

1993 ◽  
Vol 32 (Part 1, No. 10) ◽  
pp. 4641-4647 ◽  
Author(s):  
Hideto Sakane ◽  
Takafumi Miyanaga ◽  
Iwao Watanabe ◽  
Nobuyuki Matsubayashi ◽  
Shigero Ikeda ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Fine Structure ◽  
Transition Metals ◽  
Ammine Complexes ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Spectroscopy as a tool to detect multinuclear Cu(ii)–triethanolamine complexes in aqueous solution

2018 ◽  
Vol 47 (11) ◽  
pp. 3755-3763 ◽  
Author(s):  
Petra Lommens ◽  
Pieter Tack ◽  
Luce Vander Elst ◽  
Isabel Van Driessche ◽  
Laszlo Vincze ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Fine Structure ◽  
Aqueous Solutions ◽  
Nmr Relaxation ◽  
Relaxation Dispersion ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

The Evans method, Extended X-ray Absorption Fine Structure (EXAFS) and NMR relaxation dispersion (NMRD) spectroscopy were used to prove the existence of multimeric Cu(ii)–triethanolamine species in aqueous solutions.

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