2NX0

Ferrous nitrosyl blackfin tuna myoglobin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.156 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

S-nitrosylation-induced conformational change in blackfin tuna myoglobin.

Schreiter, E.R., Rodriguez, M.M., Weichsel, A., Montfort, W.R., Bonaventura, J.

(2007) J.Biol.Chem. 282: 19773-19780

  • DOI: 10.1074/jbc.M701363200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • S-nitrosylation is a post-translational protein modification that can alter the function of a variety of proteins. Despite the growing wealth of information that this modification may have important functional consequences, little is known about the ...

    S-nitrosylation is a post-translational protein modification that can alter the function of a variety of proteins. Despite the growing wealth of information that this modification may have important functional consequences, little is known about the structure of the moiety or its effect on protein tertiary structure. Here we report high-resolution x-ray crystal structures of S-nitrosylated and unmodified blackfin tuna myoglobin, which demonstrate that in vitro S-nitrosylation of this protein at the surface-exposed Cys-10 directly causes a reversible conformational change by "wedging" apart a helix and loop. Furthermore, we have demonstrated in solution and in a single crystal that reduction of the S-nitrosylated myoglobin with dithionite results in NO cleavage from the sulfur of Cys-10 and rebinding to the reduced heme iron, showing the reversibility of both the modification and the conformational changes. Finally, we report the 0.95-A structure of ferrous nitrosyl myoglobin, which provides an accurate structural view of the NO coordination geometry in the context of a globin heme pocket.

    Organizational Affiliation: 

    Protein Research Center, Department of Chemistry, University of Puerto Rico, Mayagüez, Puerto Rico 00681. eric_sch@mit.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myoglobin
A
147Thunnus orientalisMutation(s): 0 
Gene Names: mb
Find proteins for P68190 (Thunnus orientalis)
Go to UniProtKB:  P68190
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
HEM
Query on HEM
Download SDF File 
Download CCD File 
A
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
NO
Query on NO
Download SDF File 
Download CCD File 
A
NITRIC OXIDE
Nitrogen monoxide
N O
ODUCDPQEXGNKDN-UHFFFAOYAM
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACE
Query on ACE
A
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.156 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 34.520α = 90.00
b = 51.530β = 105.86
c = 38.060γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
ADSCdata collection
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-08
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance