1fd2: Difference between revisions
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New page: left|200px<br /><applet load="1fd2" size="450" color="white" frame="true" align="right" spinBox="true" caption="1fd2, resolution 1.9Å" /> '''SITE-DIRECTED MUTAGEN... |
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[[Image:1fd2.gif|left|200px]]<br /><applet load="1fd2" size=" | [[Image:1fd2.gif|left|200px]]<br /><applet load="1fd2" size="350" color="white" frame="true" align="right" spinBox="true" | ||
caption="1fd2, resolution 1.9Å" /> | caption="1fd2, resolution 1.9Å" /> | ||
'''SITE-DIRECTED MUTAGENESIS OF AZOTOBACTER VINELANDII FERREDOXIN I. (FE-S) CLUSTER-DRIVEN PROTEIN REARRANGEMENT'''<br /> | '''SITE-DIRECTED MUTAGENESIS OF AZOTOBACTER VINELANDII FERREDOXIN I. (FE-S) CLUSTER-DRIVEN PROTEIN REARRANGEMENT'''<br /> | ||
==Overview== | ==Overview== | ||
Azotobacter vinelandii ferredoxin I is a small protein that contains one | 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 Structure== | ==About this Structure== | ||
1FD2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Azotobacter_vinelandii Azotobacter vinelandii] with SF4 and F3S as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http:// | 1FD2 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Azotobacter_vinelandii Azotobacter vinelandii] with <scene name='pdbligand=SF4:'>SF4</scene> and <scene name='pdbligand=F3S:'>F3S</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FD2 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: Azotobacter vinelandii]] | [[Category: Azotobacter vinelandii]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Stout, C | [[Category: Stout, C D.]] | ||
[[Category: F3S]] | [[Category: F3S]] | ||
[[Category: SF4]] | [[Category: SF4]] | ||
[[Category: electron transfer(iron-sulfur protein)]] | [[Category: electron transfer(iron-sulfur protein)]] | ||
''Page seeded by [http:// | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:37:30 2008'' | ||
