1frx
From Proteopedia
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| - | [[Image:1frx.gif|left|200px]] | + | [[Image:1frx.gif|left|200px]] |
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| - | '''STRUCTURE AND PROPERTIES OF C20S FDI MUTANT''' | + | {{Structure |
| + | |PDB= 1frx |SIZE=350|CAPTION= <scene name='initialview01'>1frx</scene>, resolution 2.5Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene> and <scene name='pdbligand=F3S:FE3-S4 CLUSTER'>F3S</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''STRUCTURE AND PROPERTIES OF C20S FDI MUTANT''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1FRX is a [ | + | 1FRX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Azotobacter_vinelandii Azotobacter vinelandii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FRX OCA]. |
==Reference== | ==Reference== | ||
| - | Site-directed mutagenesis of Azotobacter vinelandii ferredoxin I: cysteine ligation of the [4Fe-4S] cluster with protein rearrangement is preferred over serine ligation., Shen B, Jollie DR, Diller TC, Stout CD, Stephens PJ, Burgess BK, Proc Natl Acad Sci U S A. 1995 Oct 24;92(22):10064-8. PMID:[http:// | + | Site-directed mutagenesis of Azotobacter vinelandii ferredoxin I: cysteine ligation of the [4Fe-4S] cluster with protein rearrangement is preferred over serine ligation., Shen B, Jollie DR, Diller TC, Stout CD, Stephens PJ, Burgess BK, Proc Natl Acad Sci U S A. 1995 Oct 24;92(22):10064-8. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7479727 7479727] |
[[Category: Azotobacter vinelandii]] | [[Category: Azotobacter vinelandii]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: electron transport]] | [[Category: electron transport]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:13:10 2008'' |
Revision as of 09:13, 20 March 2008
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| , resolution 2.5Å | |||||||
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| Ligands: | and | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
STRUCTURE AND PROPERTIES OF C20S FDI MUTANT
Overview
The [4Fe-4S] cluster of Azotobacter vinelandii ferredoxin I receives three of its four ligands from a Cys-Xaa-Xaa-Cys-Xaa-Xaa-Cys sequence at positions 39-45 while the fourth ligand, Cys20, is provided by a distal portion of the sequence. Previously we reported that the site-directed mutation of Cys20 to Ala (C20A protein) resulted in the formation of a new [4Fe-4S] cluster that obtained its fourth ligand from Cys24, a free cysteine in the native structure. That ligand exchange required significant protein rearrangement. Here we report the conversion of Cys20 to Ser (C20S protein), which gives the protein the opportunity either to retain the native structure and use the Ser20 O gamma as a ligand or to rearrange and use Cys24. X-ray crystallography demonstrates that the cluster does not use the Ser20 O gamma as a ligand; rather it rearranges to use Cys24. In the C20S protein the [4Fe-4S] cluster has altered stability and redox properties relative to either C20A or the native protein.
About this Structure
1FRX is a Single protein structure of sequence from Azotobacter vinelandii. Full crystallographic information is available from OCA.
Reference
Site-directed mutagenesis of Azotobacter vinelandii ferredoxin I: cysteine ligation of the [4Fe-4S] cluster with protein rearrangement is preferred over serine ligation., Shen B, Jollie DR, Diller TC, Stout CD, Stephens PJ, Burgess BK, Proc Natl Acad Sci U S A. 1995 Oct 24;92(22):10064-8. PMID:7479727
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