ISDA

Entry Detail

PDB ID:

3SNP

Keywords:

LYASE/RNA

Title:

Crystal structure analysis of iron regulatory protein 1 in complex with ferritin H IRE RNA

Biological Source:

Source Organism:

Oryctolagus cuniculus

Host Organism:

Saccharomyces cerevisiae

PDB Version:

Deposition Date:

2011-06-29

Release Date:

2011-07-27

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.80 Å

R-Value Free:

0.21

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Cytoplasmic aconitate hydratase
Mutations:C437S/C503S
Chain IDs:A, B
Chain Length:908
Number of Molecules:2
Biological Source:Oryctolagus cuniculus

UniProt ID:Q01059 Pfam ID:PF00330, PF00694

Primary Citation

Structure of dual function iron regulatory protein 1 complexed with ferritin IRE-RNA.

Walden, W.E, Selezneva, A.I, Dupuy, J, Volbeda, A, Fontecilla-Camps, J.C, Theil, E.C, Volz, K, Selezneva, A.I, Cavigiolio, G, Theil, E.C, Walden, W.E, Volz, K.Show

Science 314 1903 1908 (2006)

PMID: 17185597 DOI: 10.1126/science.1133116

Abstact

Iron regulatory protein 1 (IRP1) binds iron-responsive elements (IREs) in messenger RNAs (mRNAs), to repress translation or degradation, or binds an iron-sulfur cluster, to become a cytosolic aconitase enzyme. The 2.8 angstrom resolution crystal structure of the IRP1:ferritin H IRE complex shows an open protein conformation compared with that of cytosolic aconitase. The extended, L-shaped IRP1 molecule embraces the IRE stem-loop through interactions at two sites separated by approximately 30 angstroms, each involving about a dozen protein:RNA bonds. Extensive conformational changes related to binding the IRE or an iron-sulfur cluster explain the alternate functions of IRP1 as an mRNA regulator or enzyme.

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Primary Citation of related structures