2bix: Difference between revisions

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[[Image:2bix.gif|left|200px]]
{{Seed}}
[[Image:2bix.png|left|200px]]


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{{STRUCTURE_2bix|  PDB=2bix  |  SCENE=  }}  
{{STRUCTURE_2bix|  PDB=2bix  |  SCENE=  }}  


'''CRYSTAL STRUCTURE OF APOCAROTENOID CLEAVAGE OXYGENASE FROM SYNECHOCYSTIS, FE-FREE APOENZYME'''
===CRYSTAL STRUCTURE OF APOCAROTENOID CLEAVAGE OXYGENASE FROM SYNECHOCYSTIS, FE-FREE APOENZYME===




==Overview==
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Enzymes that produce retinal and related apocarotenoids constitute a sequence- and thus structure-related family, a member of which was analyzed by x-ray diffraction. This member is an oxygenase and contains an Fe2+-4-His arrangement at the axis of a seven-bladed beta-propeller chain fold covered by a dome formed by six large loops. The Fe2+ is accessible through a long nonpolar tunnel that holds a carotenoid derivative in one of the crystals. On binding, three consecutive double bonds of this carotenoid changed from a straight all-trans to a cranked cis-trans-cis conformation. The remaining trans bond is located at the dioxygen-ligated Fe2+ and cleaved by oxygen.
The line below this paragraph, {{ABSTRACT_PUBMED_15821095}}, adds the Publication Abstract to the page
(as it appears on PubMed at http://www.pubmed.gov), where 15821095 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15821095}}


==About this Structure==
==About this Structure==
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[[Category: Oxygenase]]
[[Category: Oxygenase]]
[[Category: Retinal formation]]
[[Category: Retinal formation]]
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