| Characterization of Ferredoxin and Flavodoxin as Molecular Indicators of Iron Limitation in Marine Eukaryotic Phytoplankton |
SEP 97 |
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| Authors:
Deana L. Erdner; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
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 | Expression and regulation of the proteins ferredoxin and flavodoxin were investigated to assess their usefulness as biomarkers of iron limitation in marine phytoplankton. A phylogenetic survey of seventeen species found replacement of ferredoxin by flavodoxin to be a common response to iron stress. A minority of organisms examined never expressed flavodoxin, a condition associated with, but not characteristic of, neritic habitats. Flavodoxin induction responded specifically to iron limitation but not ... |
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| An Examination of the Configuration Averaged Hartree-Fock Procedure for Model Ferredoxin and Its Electronic Spectroscopy |
95 |
7 pages |
| Authors:
Marshall G. Cory; Krassimir K. Stavrev; Michael C. Zerner; FLORIDA UNIV GAINESVILLE DEPT OF CHEMISTRY
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 | A configuration averaged Hartree-Fock (CAHF) procedure has been applied to a model ferredoxin Fe2S2(SH)4(2-). The anti-ferromagnetism and spectroscopy have been studied within the restricted open-shell Hartree-Fock (ROHF) approximation and the resulting wavefunction refined by a subsequent configuration interaction (CI). The results obtained suggest that a simple CAHF model, with spin projection, is accurate, typically producing states of the correct nature when compared with those derived from far more computer intensive ... |
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| Structural Analysis of Proteins in Extreme Saline Environments |
16 MAR 89 |
32 pages |
| Authors:
M. Shoham; J. L. Sussman; WEIZMANN INST OF SCIENCE REHOVOT (ISRAEL)
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| The objective of the proposed research plan was to elucidate the three-dimensional structure of 2Fe-2S ferredoxin from halobacteria of the Dead Sea and its comparison, to the available structure of a homologous 2Fe-2S ferredoxin from a nonhalophilic source, the algae Spirulina platensis. We wanted to understand what sort of adaptation, on the molecular level, is needed so that a protein can function in a hostile environment such as the Dead ... |
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Reports by Keyword(s)
*FERREDOXIN
