Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 15 

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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.

(1996) Biochemistry 35: 5928-5936

  • DOI: https://doi.org/10.1021/bi9528513
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    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.

  • Organizational Affiliation

    Department of Chemistry, University of Florence, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HIGH POTENTIAL IRON SULFUR PROTEIN86Allochromatium vinosumMutation(s): 1 
Find proteins for P00260 (Allochromatium vinosum (strain ATCC 17899 / DSM 180 / NBRC 103801 / NCIMB 10441 / D))
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Go to UniProtKB:  P00260
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00260
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 15 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-06-10
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-03
    Changes: Data collection, Database references, Derived calculations, Other
  • Version 1.4: 2024-05-22
    Changes: Data collection