2bix: Difference between revisions
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==Overview== | ==Overview== | ||
Enzymes that produce retinal and related apocarotenoids constitute a | 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. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: Al-Babili, S.]] | [[Category: Al-Babili, S.]] | ||
[[Category: Beyer, P.]] | [[Category: Beyer, P.]] | ||
[[Category: Kloer, D | [[Category: Kloer, D P.]] | ||
[[Category: Ruch, S.]] | [[Category: Ruch, S.]] | ||
[[Category: Schulz, G | [[Category: Schulz, G E.]] | ||
[[Category: C8E]] | [[Category: C8E]] | ||
[[Category: GOL]] | [[Category: GOL]] | ||
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[[Category: retinal formation]] | [[Category: retinal formation]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:38:17 2008'' | ||