Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 2.69 kDa 
• Atom Count: 166 
• Modelled Residue Count: 26 
• Deposited Residue Count: 26 
• Unique protein chains: 1

2L61

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

• PDB DOI: 10.2210/pdb2L61/pdb
• BMRB: 17294

• Classification: METAL BINDING PROTEIN
• Organism(s): Triticum aestivum
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-11-12 Released: 2011-05-25 
• Deposition Author(s): Loebus, J., Peroza, E.A., Bluethgen, N., Fox, T., Meyer-Klaucke, W., Zerbe, O., Freisinger, E.

---

Experimental Data Snapshot

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

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

• PubMed: 21437709 
• DOI: 10.1007/s00775-011-0770-2
• Primary Citation of Related Structures:  
  2L61, 2L62


• 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. 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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
EC protein I/II	A	26	Triticum aestivum	Mutation(s): 0
UniProt
Find proteins for P30569 (Triticum aestivum) Explore P30569  Go to UniProtKB:  P30569

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CD	B [auth A], C [auth A]	CADMIUM ION Cd WLZRMCYVCSSEQC-UHFFFAOYSA-N

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

Entry History 

Deposition Data

• Deposited Date: 2010-11-12 
• Released Date: 2011-05-25 
Deposition Author(s): Loebus, J., Peroza, E.A., Bluethgen, N., Fox, T., Meyer-Klaucke, W., Zerbe, O., Freisinger, E.

Revision History  

• 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