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. 1978 Sep;75(9):4069–4073. doi: 10.1073/pnas.75.9.4069

Characterization of the blue copper site in oxidized azurin by extended x-ray absorption fine structure: Determination of a short Cu—S distance

Thomas D Tullius 1, Patrick Frank 1, Keith O Hodgson 1
PMCID: PMC336051  PMID: 16592557

Abstract

The primary coordination environment of the “blue” copper ion in oxidized azurin has been elucidated by x-ray absorption spectroscopy. The most striking feature is the unambiguous presence of a very short copper-sulfur distance at 2.10 ± 0.02 Å. Nitrogen ligands, presumed to be from imidazoles, are found at 1.97 Å. There is some evidence that the copper coordination sphere may be completed by a second sulfur, the distance of which is determined with much less certainty.

Keywords: x-ray absorption spectroscopy, type 1 copper

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Selected References

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