ISSN:
1573-4943
Keywords:
Azotobacter vinelandii
;
H2-uptake activity
;
spectra and kinetics
;
self-regulation of the protein shell
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Bacterial ferritin from Azotobacter vinelandii (AvBFo has a function in H2 uptake. The Fe3+ reduction on the surface of the iron core from AvBFo is accompanied simultaneously by H2 uptake, with a maximum activity of H2 uptake of 450 H2/AvBFo. A reduction potential of −402 mV for iron reduction on the surface of the core is found. A shift to the red the protein absorbance peaks ranging from 280 to 290 nm is observed between pH5 and 9 under 100% H2 reduction. The reduction potential for iron release becomes negative at a rate of 0.025 mV/Fe2+ released. The kinetics of iron release on the surface of the core is a first-order reaction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022538530701
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