ISDA

Deposition Date 2011-01-25

Release Date 2011-05-25

Last Version Date 2024-11-20

Entry Detail

PDB ID:

3QHB

Keywords:

METAL TRANSPORT

Title:

Crystal structure of oxidized Symerythrin from Cyanophora paradoxa

Biological Source:

Source Organism:

Cyanophora paradoxa (Taxon ID: 2762)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.20 Å

R-Value Free:

0.12

R-Value Work:

0.10

R-Value Observed:

0.10

Space Group:

P 32

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Symerythrin
Chain IDs:A, B
Chain Length:179
Number of Molecules:2
Biological Source:Cyanophora paradoxa

UniProt ID:P48329 Pfam ID:PF02915

Ligand Molecules

Primary Citation

A diiron protein autogenerates a valine-phenylalanine cross-link.

Cooley, R.B, Rhoads, T.W, Arp, D.J, Karplus, P.A.Show

Science 332 929 929 (2011)

PMID: 21596985 DOI: 10.1126/science.1205687

Abstact

All known internal covalent cross-links in proteins involve functionalized groups having oxygen, nitrogen, or sulfur atoms present to facilitate their formation. Here, we report a carbon-carbon cross-link between two unfunctionalized side chains. This valine-phenyalanine cross-link, produced in an oxygen-dependent reaction, is generated by its own carboxylate-bridged diiron center and serves to stabilize the metallocenter. This finding opens the door to new types of posttranslational modifications, and it demonstrates new catalytic potential of diiron centers.

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Primary Citation of related structures