1fd2
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| , resolution 1.9Å | |||||||
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| Ligands: | , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
SITE-DIRECTED MUTAGENESIS OF AZOTOBACTER VINELANDII FERREDOXIN I. (FE-S) CLUSTER-DRIVEN PROTEIN REARRANGEMENT
OverviewOverview
Azotobacter vinelandii ferredoxin I is a small protein that contains one [4Fe-4S] cluster and one [3Fe-4S] cluster. Recently the x-ray crystal structure has been redetermined and the fdxA gene, which encodes the protein, has been cloned and sequenced. Here we report the site-directed mutation of Cys-20, which is a ligand of the [4Fe-4S] cluster in the native protein, to alanine and the characterization of the protein product by x-ray crystallographic and spectroscopic methods. The data show that the mutant protein again contains one [4Fe-4S] cluster and one [3Fe-4S] cluster. The new [4Fe-4S] cluster obtains its fourth ligand from Cys-24, a free cysteine in the native structure. The formation of this [4Fe-4S] cluster drives rearrangement of the protein structure.
About this StructureAbout this Structure
1FD2 is a Single protein structure of sequence from Azotobacter vinelandii. Full crystallographic information is available from OCA.
ReferenceReference
Site-directed mutagenesis of Azotobacter vinelandii ferredoxin I: [Fe-S] cluster-driven protein rearrangement., Martin AE, Burgess BK, Stout CD, Cash VL, Dean DR, Jensen GM, Stephens PJ, Proc Natl Acad Sci U S A. 1990 Jan;87(2):598-602. PMID:2153958
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