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Default NMR spectroscopic studies of the hydrogenosomal [2Fe-2S] ferredoxin from Trichomonas

NMR spectroscopic studies of the hydrogenosomal [2Fe-2S] ferredoxin from Trichomonas vaginalis: hyperfine-shifted 1H resonances.

Related Articles NMR spectroscopic studies of the hydrogenosomal [2Fe-2S] ferredoxin from Trichomonas vaginalis: hyperfine-shifted 1H resonances.

J Inorg Biochem. 1998 Dec;72(3-4):127-31

Authors: Liu HY, Germanas JP

The hyperfine-shifted 1H NMR resonances of oxidized and reduced Trichomonas vaginalis ferredoxin, a functionally unique [2Fe-2S] ferredoxin, have been studied. The oxidized protein spectrum displayed a pattern of six broad upfield-shifted resonances between 13 and 40 ppm with chemical shifts distinct from those of other [2Fe-2S] ferredoxins. All hyperfine 1H resonances of the oxidized ferredoxin displayed anti-Curie temperature dependences. Reduced T. vaginalis ferredoxin displayed hyperfine resonances both upfield and downfield of the diamagnetic region. These resonances showed Curie temperature dependences. Overall the hyperfine-shifted NMR spectrum of T. vaginalis ferredoxin, along with other spectroscopic properties, suggested different structural properties for the active center of oxidized hydrogenosomal ferredoxins from those of other [2Fe-2S] ferredoxins.

PMID: 10065531 [PubMed - indexed for MEDLINE]



Source: PubMed
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