Výsledky vyhledávání

High and low reduction potential 4Fe-4S clusters in Azotobacter vinelandii (4Fe-4S) 2ferredoxin I. Influence of the polypeptide on the reduction potentials

Autor: J C Rabinowitz, W V Sweeney, D C Yoch

Publikováno v: Journal of Biological Chemistry. 250:7842-7847

Azotobacter vinelandii (4Fe-4S)2 ferredoxin I (Fd I) is an electron transfer protein with Mr equals 14,500 and Eo equals -420 mv. It exhibits and EPR signal of g equals 2.01 in its isolated form. This resonance is almost identical with the signal tha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86487d91f5ce3528e9615b0e2dd49506
https://doi.org/10.1016/s0021-9258(19)40892-2

Zobrazit plný text záznamu

Characterization of two soluble ferredoxins as distinct from bound iron-sulfur proteins in the photosynthetic bacterium Rhodospirillum rubrum

Autor: D I Arnon, W V Sweeney, D C Yoch

Publikováno v: Journal of Biological Chemistry. 250:8330-8336

In an earlier investigation (Shanmugam, K. T., Buchanan, B. B., and Arnon, D. I. (1972) Biochim. Biophys. Acta 256, 477-486) the extraction of ferredoxin from Rhodospirillum rubrum cells with the aid of a detergent (Triton X-100) and acetone revealed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c42c79fba665d4358b924d657bc68ce
https://doi.org/10.1016/s0021-9258(19)40763-1

Zobrazit plný text záznamu

Origin of the pH dependence of the midpoint reduction potential in Clostridium pasteurianum ferredoxin:oxidation state-dependent hydrogen ion association

Autor: R S Magliozzo, W V Sweeney, B A McIntosh

Publikováno v: Journal of Biological Chemistry. 257:3506-3509

The origin of the dependence of E1/2 on pH exhibited by Clostridium pasteurianum 2(4Fe-4S) ferredoxin has been investigated. The results show that oxidation state-dependent pK values, which may arise from sites on the iron-sulfur centers, are respons

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::86a0347a86eed0480c8d24c1aec7ad9c
https://doi.org/10.1016/s0021-9258(18)34807-5

Zobrazit plný text záznamu

Magnetic interactions between dysprosium complexes and two soluble iron-sulfur proteins

Autor: W V Sweeney, Michael A. Cusanovich, T Ohnishi, Haywood Blum

Publikováno v: Journal of Biological Chemistry. 256:2199-2206

A tetranuclear ferredoxin from Rhodopseudomonas gelatinosa [4Fe-4S](+2,+3) has been examined by electron paramagnetic resonance techniques. The temperature-dependence and relaxation characteristics of the spectral lines indicate that the spin-lattice

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f76086f8c3b68b3de397cf6e565ebfdb
https://doi.org/10.1016/s0021-9258(19)69760-7

Zobrazit plný text záznamu

Proton magnetic resonance studies of Azotobacter vinelandii ferredoxin I. Evidence for a difference in coordination of the 3Fe centers in azotobacter vinelandii ferredoxin I and desulfovibrio gigas ferredoxin II

Autor: W V Sweeney

Publikováno v: Journal of Biological Chemistry. 256:12222-12227

Proton magnetic resonance studies have been made of Azotobacter vinelandii ferredoxin I. This protein contains a low potential 3Fe-3S center (Emp = -424 mV) and a high potential 4Fe-4S center (Emp = +320 mV). A series of five single proton resonances

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43eb7f401024557756bccc5cf9f8956e
https://doi.org/10.1016/s0021-9258(18)43257-7

Zobrazit plný text záznamu

Direct assignment of the cysteinyl, the slowly exchangeable, and the aromatic ring 1H nuclear magnetic resonances in clostridial-type ferredoxins

Autor: Jesse C. Rabinowitz, W V Sweeney, E L Packer

Publikováno v: Journal of Biological Chemistry. 252:2245-2253

We have directly assigned the 1H NMR corresponding to the cysteinyl protons, the slowly exchangeable protons, and the aromatic ring protons in the 1H NMR spectrum of Clostridium acidi-urici ferredoxin by isotopic labeling and 13C NMR decoupling techn

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e065b4ab5bfbcf0229361af593dd853a
https://doi.org/10.1016/s0021-9258(17)40547-3

Zobrazit plný text záznamu

ESR of spin 5/2 systems with axial symmetry and moderately large zero‐field splittings. Application of line‐shape calculations to the interpretation of randomly oriented microcrystallite spectra

Autor: R. E. Coffman, Dimitri Coucouvanis, W. V. Sweeney

Publikováno v: The Journal of Chemical Physics. 59:369-379

Magnetic resonance line positions and intensities are calculated for the simplified spin‐Hamiltonian H=D[Sz2−S(S+1)/3]+g μBH·Swith S=5/2. The resonance line positions and intensities are found by direct diagonalization of the matrix of ℋ and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b20c82322f7931402d2813729f8c0fde
https://doi.org/10.1063/1.1679814

Zobrazit plný text záznamu

Electron spin resonance spectroscopy of the bisdithiooxalatonitrosyl iron anion

Autor: R. E. Coffman, W. V. Sweeney

Publikováno v: The Journal of Physical Chemistry. 76:49-53

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6994e8cbe3264c0782fc92245c23ab0b
https://doi.org/10.1021/j100645a009

Zobrazit plný text záznamu

Determination of cooperative interaction between clusters in Clostridium pasteurianum 2 (4Fe-4S) ferredoxin

Autor: W V Sweeney, B A McIntosh

Publikováno v: Journal of Biological Chemistry. 254:4499-4501

The effect of reducing one 4Fe-4S cluster in Clostridium pasteurianum 2 (4Fe-4S) ferredoxin on the reduction potential of the unreduced cluster has been investigated. While such an effect is suggested by both the x-ray structure of Peptococcus aeroge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af32bf9200c747cd452df093a7d50285
https://doi.org/10.1016/s0021-9258(17)30038-8

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání