2L61

Protein and metal cluster structure of the wheat metallothionein domain g-Ec-1. The second part of the puzzle.


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 40 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Protein and metal cluster structure of the wheat metallothionein domain gamma-E(c)-1: the second part of the puzzle.

Loebus, J.Peroza, E.A.Bluthgen, N.Fox, T.Meyer-Klaucke, W.Zerbe, O.Freisinger, E.

(2011) J Biol Inorg Chem 16: 683-694

  • DOI: 10.1007/s00775-011-0770-2
  • Primary Citation of Related Structures:  
    2L62, 2L61

  • PubMed Abstract: 
  • Metallothioneins (MTs) are small cysteine-rich proteins coordinating various transition metal ions, including Zn(II), Cd(II), and Cu(I). MTs are ubiquitously present in all phyla, indicating a successful molecular concept for metal ion binding in all organisms ...

    Metallothioneins (MTs) are small cysteine-rich proteins coordinating various transition metal ions, including Zn(II), Cd(II), and Cu(I). MTs are ubiquitously present in all phyla, indicating a successful molecular concept for metal ion binding in all organisms. The plant MT E(c)-1 from Triticum aestivum, common bread wheat, is a Zn(II)-binding protein that comprises two domains and binds up to six metal ions. The structure of the C-terminal four metal ion binding β(E) domain was recently described. Here we present the structure of the N-terminal second domain, γ-E(c)-1, determined by NMR spectroscopy. The γ-E(c)-1 domain enfolds an M (2) (II) Cys(6) cluster and was characterized as part of the full-length Zn(6)E(c)-1 protein as well as in the form of the separately expressed domain, both in the Zn(II)-containing isoform and the Cd(II)-containing isoform. Extended X-ray absorption fine structure analysis of Zn(2)γ-E(c)-1 clearly shows the presence of a ZnS(4) coordination sphere with average Zn-S distances of 2.33 Å. (113)Cd NMR experiments were used to identify the M(II)-Cys connectivity pattern, and revealed two putative metal cluster conformations. In addition, the general metal ion coordination abilities of γ-E(c)-1 were probed with Cd(II) binding experiments as well as by pH titrations of the Zn(II) and Cd(II) forms, the latter suggesting an interaction of the γ domain and the β(E) domain within the full-length protein.


    Organizational Affiliation

    Institute of Inorganic Chemistry, University of Zurich, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EC protein I/IIA26Triticum aestivumMutation(s): 0 
Find proteins for P30569 (Triticum aestivum)
Explore P30569 
Go to UniProtKB:  P30569
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 40 
  • Selection Criteria: structures with the least restraint violations 
  • OLDERADO: 2L61 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-06-19
    Changes: Database references