2NRL

Blackfin tuna myoglobin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.91 Å
  • R-Value Free: 0.149 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.3 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:  2NRM, 2NX0

  • 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, Mayag├╝ez, Puerto Rico 00681. eric_sch@mit.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myoglobin
A
147Thunnus orientalisGene Names: mb
Find proteins for P68190 (Thunnus orientalis)
Go to UniProtKB:  P68190
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 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
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: 0.91 Å
  • R-Value Free: 0.149 
  • R-Value Work: 0.149 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 33.985α = 90.00
b = 51.976β = 103.96
c = 38.781γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
MAR345data collection
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-05-08
    Type: Initial release
  • Version 1.1: 2007-10-23
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Advisory, Refinement description