1noe

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[[Image:1noe.gif|left|200px]]
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[[Image:1noe.png|left|200px]]
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{{STRUCTURE_1noe| PDB=1noe | SCENE= }}
{{STRUCTURE_1noe| PDB=1noe | SCENE= }}
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'''NMR STUDY OF REDUCED HIGH POTENTIAL IRON SULFUR PROTEIN'''
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===NMR STUDY OF REDUCED HIGH POTENTIAL IRON SULFUR PROTEIN===
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==Overview==
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The full 1H NMR assignment of the reduced C77S mutant of Chromatium vinosum high-potential iron-sulfur protein (HiPIP) was achieved by taking advantage of the assignment available for the wild-type protein. A total of 1565 nuclear Overhauser effect (NOE) spectroscopy cross peaks were integrated and converted into distance constraints, of which 497 were found to be irrelevant. An additional 24 dipolar constraints were obtained from one-dimensional NOE difference spectra by saturating hyperfine-shifted beta CH2 cysteine/serine protons. Forty-six 3JNH-H alpha coupling constants and eight hydrogen bonds provided further constraints. Through a distance geometry approach, a family of 15 structures was calculated, which was subsequently subjected to restrained energy minimization. The root mean square deviations of the minimized structures were 0.62 +/- 0.09 and 1.09 +/- 0.11 A for backbone and heavy atoms, respectively. The resulting solution structures are very similar to those of the reduced wild-type protein (WT). An analysis of the NOEs experienced by the protons of Ser-77 in both the reduced and oxidized forms reveals that they are very similar to those experienced by Cys-77 in WT. On the basis of the hyperfine shifts observed for the Ser-77 protons and of the present structural analysis, it is concluded that the serine O gamma atom is coordinated to the polymetallic center, thus confirming the strict analogy of the electronic structures of the polymetallic center in both proteins. Capillary electrophoresis experiments demonstrate coordination of Ser-77 as an anion. Serine versus cysteine coordination in iron-sulfur proteins is briefly discussed.
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(as it appears on PubMed at http://www.pubmed.gov), where 8639555 is the PubMed ID number.
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{{ABSTRACT_PUBMED_8639555}}
==About this Structure==
==About this Structure==
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1NOE is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Allochromatium_vinosum Allochromatium vinosum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NOE OCA].
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1NOE is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Allochromatium_vinosum Allochromatium vinosum]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1NOE OCA].
==Reference==
==Reference==
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[[Category: Electron transport]]
[[Category: Electron transport]]
[[Category: Iron-sulfur]]
[[Category: Iron-sulfur]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 02:54:17 2008''

Revision as of 23:54, 28 July 2008

Image:1noe.png

Template:STRUCTURE 1noe

NMR STUDY OF REDUCED HIGH POTENTIAL IRON SULFUR PROTEIN

Template:ABSTRACT PUBMED 8639555

About this Structure

1NOE is a Single protein structure of sequence from Allochromatium vinosum. Full experimental information is available from OCA.

Reference

Three-dimensional structure of the reduced C77S mutant of the Chromatium vinosum high-potential iron-sulfur protein through nuclear magnetic resonance: comparison with the solution structure of the wild-type protein., Bentrop D, Bertini I, Capozzi F, Dikiy A, Eltis L, Luchinat C, Biochemistry. 1996 May 7;35(18):5928-36. PMID:8639555

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