4B4Y

crystal structure of the neuroglobin from the photosymbiotic marine acoel Symsagittifera roscoffensis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 

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This is version 1.3 of the entry. See complete history


Literature

Neuroglobins: Pivotal Proteins Associated with Emerging Neural Systems and Precursors of Metazoan Globin Diversity.

Lechauve, C.Jager, M.Laguerre, L.Kiger, L.Correc, G.Leroux, C.Vinogradov, S.Czjzek, M.Marden, M.C.Bailly, X.

(2013) J Biol Chem 288: 6957

  • DOI: 10.1074/jbc.M112.407601
  • Primary Citation of Related Structures:  
    4B4Y

  • PubMed Abstract: 
  • Neuroglobins, previously thought to be restricted to vertebrate neurons, were detected in the brain of a photosymbiotic acoel, Symsagittifera roscoffensis, and in neurosensory cells of the jellyfish Clytia hemisphaerica. For the neuroglobin of S. roscoffensis, a member of a lineage that originated either at the base of the bilateria or of the deuterostome clade, we report the ligand binding properties, crystal structure at 2 ...

    Neuroglobins, previously thought to be restricted to vertebrate neurons, were detected in the brain of a photosymbiotic acoel, Symsagittifera roscoffensis, and in neurosensory cells of the jellyfish Clytia hemisphaerica. For the neuroglobin of S. roscoffensis, a member of a lineage that originated either at the base of the bilateria or of the deuterostome clade, we report the ligand binding properties, crystal structure at 2.3 Å, and brain immunocytochemical pattern. We also describe in situ hybridizations of two neuroglobins specifically expressed in differentiating nematocytes (neurosensory cells) and in statocytes (ciliated mechanosensory cells) of C. hemisphaerica, a member of the early branching animal phylum cnidaria. In silico searches using these neuroglobins as queries revealed the presence of previously unidentified neuroglobin-like sequences in most metazoan lineages. Because neural systems are almost ubiquitous in metazoa, the constitutive expression of neuroglobin-like proteins strongly supports the notion of an intimate association of neuroglobins with the evolution of animal neural systems and hints at the preservation of a vitally important function. Neuroglobins were probably recruited in the first protoneurons in early metazoans from globin precursors. Neuroglobins were identified in choanoflagellates, sponges, and placozoans and were conserved during nervous system evolution. Because the origin of neuroglobins predates the other metazoan globins, it is likely that neuroglobin gene duplication followed by co-option and subfunctionalization led to the emergence of globin families in protostomes and deuterostomes (i.e. convergent evolution).


    Organizational Affiliation

    INSERM, UMR S 968, Centre National de la Recherche Scientifique (CNRS), Unité Mixte de Recherche (UMR)_7210, Institut de la Vision Université Pierre et Marie Curie (UPMC)/Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, 17 rue Moreau, 75012 Paris, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NEUROGLOBINA154Symsagittifera roscoffensisMutation(s): 0 
UniProt
Find proteins for L7MTK4 (Symsagittifera roscoffensis)
Explore L7MTK4 
Go to UniProtKB:  L7MTK4
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
B [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
OXY
Query on OXY

Download Ideal Coordinates CCD File 
C [auth A]OXYGEN MOLECULE
O2
MYMOFIZGZYHOMD-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 
  • Space Group: P 62 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 97.07α = 90
b = 97.07β = 90
c = 140.1γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
SHELXDphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-09
    Type: Initial release
  • Version 1.1: 2013-01-16
    Changes: Database references
  • Version 1.2: 2013-03-27
    Changes: Database references
  • Version 1.3: 2015-04-29
    Changes: Data collection