Related Articles1H NMR of high-potential iron-sulfur protein from the purple non-sulfurbacterium Rhodoferax fermentans.
Eur J Biochem. 1996 Mar 1;236(2):405-11
Authors: Ciurli S, Cremonini MA, Kofod P, Luchinat C
Oxidized and reduced forms of high-potential iron-sulfur protein (HiPIP) from the purple non-sulfur photosynthetic bacterium Rhodoferax fermentans have been characterized using 1H-NMR spectroscopy. Pairwise and sequence-specific assignments of hyperfine-shifted 1H-NMR signals to protons of cysteine residues bound to the [4Fe-4S]3+/2+ cluster have been performed using one-dimensional NOE and exchange spectroscopy experiments. 1H-NMR hyperfine shifts and relaxation rates of cluster-bound Cys beta-CH2 protons indicate that in the [4Fe-4S]3+ cluster one iron ion can be formally described as Fe(III), while electron density corresponding to one electron is unevenly delocalized onto the remaining three iron ions. This delocalization is effected by means of two different electronic distributions interconverting rapidly on the NMR time scale. The mechanism of paramagnetic proton relaxation, studied by analyzing longitudinal relaxation rates of Cys beta-CH2 protons in HiPIPs from six different sources as a function of the Fe-S-C beta-C alpha dihedral angle, indicate that the major contribution is due to a dipolar metal-centered mechanism, with a non-negligible contribution from a ligand-centered dipolar mechanism which involves the 3p orbital of the Cys sulfur atom. A semi-quantitative tool for extracting structural information from relaxation time measurements is proposed.
[NMR paper] Solution NMR structure of the iron-sulfur cluster assembly protein U (IscU) with zinc
Solution NMR structure of the iron-sulfur cluster assembly protein U (IscU) with zinc bound at the active site.
Related Articles Solution NMR structure of the iron-sulfur cluster assembly protein U (IscU) with zinc bound at the active site.
J Mol Biol. 2004 Nov 19;344(2):567-83
Authors: Ramelot TA, Cort JR, Goldsmith-Fischman S, Kornhaber GJ, Xiao R, Shastry R, Acton TB, Honig B, Montelione GT, Kennedy MA
IscU is a highly conserved protein that serves as the scaffold for IscS-mediated assembly of iron-sulfur () clusters. We report the NMR...
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[NMR paper] Identification of slow motions in the reduced recombinant high-potential iron sulfur
Identification of slow motions in the reduced recombinant high-potential iron sulfur protein I (HiPIP I) from Ectothiorhodospira halophila via 15N rotating-frame NMR relaxation measurements.
Related Articles Identification of slow motions in the reduced recombinant high-potential iron sulfur protein I (HiPIP I) from Ectothiorhodospira halophila via 15N rotating-frame NMR relaxation measurements.
J Biomol NMR. 1998 Aug;12(2):307-18
Authors: Banci L, Felli IC, Koulougliotis D
Rotating-frame 15N relaxation rate (R1 rho) NMR experiments have been...
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[NMR paper] Exploration of the structural environment of the iron-sulfur cluster in putidaredoxin
Exploration of the structural environment of the iron-sulfur cluster in putidaredoxin by nitrogen-15 NMR spectroscopy of selectively labeled cysteine residues.
Related Articles Exploration of the structural environment of the iron-sulfur cluster in putidaredoxin by nitrogen-15 NMR spectroscopy of selectively labeled cysteine residues.
Biochem Biophys Res Commun. 1998 Aug 28;249(3):773-80
Authors: Sari N, Holden MJ, Mayhew MP, Vilker VL, Coxon B
Putidaredoxin is a di-iron protein whose paramagnetic region is not well characterized by 1H...
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[NMR paper] Three-dimensional solution structure of the oxidized high potential iron-sulfur prote
Three-dimensional solution structure of the oxidized high potential iron-sulfur protein from Chromatium vinosum through NMR. Comparative analysis with the solution structure of the reduced species.
Related Articles Three-dimensional solution structure of the oxidized high potential iron-sulfur protein from Chromatium vinosum through NMR. Comparative analysis with the solution structure of the reduced species.
Biochemistry. 1995 Aug 8;34(31):9851-8
Authors: Bertini I, Dikiy A, Kastrau DH, Luchinat C, Sompornpisut P
The NMR solution structure of...
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[NMR paper] The three-dimensional solution structure of the reduced high-potential iron-sulfur pr
The three-dimensional solution structure of the reduced high-potential iron-sulfur protein from Chromatium vinosum through NMR.
Related Articles The three-dimensional solution structure of the reduced high-potential iron-sulfur protein from Chromatium vinosum through NMR.
Biochemistry. 1995 Jan 10;34(1):206-19
Authors: Banci L, Bertini I, Dikiy A, Kastrau DH, Luchinat C, Sompornpisut P
The 1H NMR assignment of the reduced HiPIP from Chromatium vinosum available in the literature has been extended up to 85% of the total protein protons. Ninety...
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[NMR paper] 1H-NMR investigation of oxidized and reduced high-potential iron-sulfur protein from
1H-NMR investigation of oxidized and reduced high-potential iron-sulfur protein from Rhodopseudomonas globiformis.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www3.interscience.wiley.com-aboutus-images-wiley_interscience_pubmed_logo_FREE_120x27.gif Related Articles 1H-NMR investigation of oxidized and reduced high-potential iron-sulfur protein from Rhodopseudomonas globiformis.
Eur J Biochem. 1993 Feb 15;212(1):69-78
Authors: Bertini I, Capozzi F, Luchinat C, Piccioli M
1H one-dimensional and two-dimensional NMR spectra have been...
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[NMR paper] 1H NMR studies of oxidized high-potential iron protein from Chromatium vinosum. Nucle
1H NMR studies of oxidized high-potential iron protein from Chromatium vinosum. Nuclear Overhauser effect measurements.
Related Articles 1H NMR studies of oxidized high-potential iron protein from Chromatium vinosum. Nuclear Overhauser effect measurements.
Biochemistry. 1990 Jun 12;29(23):5633-7
Authors: Cowan JA, Sola M
1H nuclear Overhauser effect experiments on the isotropically shifted signals of oxidized Chromatium vinosum HiPIP have been used to identify the four beta-CH2 geminal couples of the cysteine ligands. A partial assignment to...
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[NMR paper] Investigations concerning the potential for using 1H NMR relaxometry or high-resoluti
Investigations concerning the potential for using 1H NMR relaxometry or high-resolution spectroscopy of plasma as a screening test for malignant lung disease.
Related Articles Investigations concerning the potential for using 1H NMR relaxometry or high-resolution spectroscopy of plasma as a screening test for malignant lung disease.
Magn Reson Med. 1990 Jan;13(1):103-32
Authors: Schuhmacher JH, Conrad D, Manke HG, Clorius JH, Matys ER, Hauser H, Zuna I, Maier-Borst W, Hull WE
In 158 plasma samples, obtained from patients with lung carcinoma,...