Journal:JBIC:10
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<b>Molecular Tour</b><br> | <b>Molecular Tour</b><br> | ||
| - | Structures of the all cysteinyl coordinated D14C variant of ferredoxin from the hyperthermophilic archaeon ''Pyrococcus furiosus'' have been determined for the <scene name='Journal:JBIC:10/Cv1/5'>[4Fe-4S]</scene> <-> and <scene name='Journal:JBIC:10/Cv1/6'>[3Fe-4S]</scene> forms (<scene name='Journal:JBIC:10/Cv1/8'>click to enlarge</scene>). The [4Fe-4S] form diffracted to 1.7 Å and two different types of molecules were found in the crystal ([[2z8q]]). They have different crystal packing and intramolecular disulfide bond conformation. The crystal packing reveals a <scene name='Journal:JBIC:10/Cv/5'>beta-sheet interaction between A molecules in adjacent asymmetric units</scene>, while B molecules are packed as monomers in a less rigid position next to the A-A extended beta-sheet dimers. The intramolecular disulfide bond in the A molecules is in a double conformation while the intramolecular disulfide bond in the B molecules is in a single conformation. | + | Structures of the all cysteinyl coordinated D14C variant of ferredoxin from the hyperthermophilic archaeon ''Pyrococcus furiosus'' have been determined for the <scene name='Journal:JBIC:10/Cv1/5'>[4Fe-4S]</scene> <-> and <scene name='Journal:JBIC:10/Cv1/6'>[3Fe-4S]</scene> forms (<scene name='Journal:JBIC:10/Cv1/8'>click to enlarge</scene>). The [4Fe-4S] form diffracted to 1.7 Å and two different types of molecules were found in the crystal ([[2z8q]]). They have different crystal packing and intramolecular disulfide bond conformation. The crystal packing reveals a <scene name='Journal:JBIC:10/Cv/5'>beta-sheet interaction between A molecules in adjacent asymmetric units</scene>, while <scene name='Journal:JBIC:10/Cv/6'>B molecules are packed as monomers in a less rigid position next to the A-A extended beta-sheet dimers</scene>. The intramolecular disulfide bond in the A molecules is in a double conformation while the intramolecular disulfide bond in the B molecules is in a single conformation. |
Two forms of D14C [3Fe-4S] ''Pyrococcus furiosus'' ferredoxin are obtained when purified at pH 8.0: a monomer and a dimer connected by an intermolecular disulfide bond. When purified at pH 5.8, only the monomer is obtained. The [3Fe-4S] form diffracted to 2.8 Å resolution and showed only the monomeric form, which resembles molecule A of D14C [4Fe-4S] ''Pyrococcus furiosus'' ferredoxin. | Two forms of D14C [3Fe-4S] ''Pyrococcus furiosus'' ferredoxin are obtained when purified at pH 8.0: a monomer and a dimer connected by an intermolecular disulfide bond. When purified at pH 5.8, only the monomer is obtained. The [3Fe-4S] form diffracted to 2.8 Å resolution and showed only the monomeric form, which resembles molecule A of D14C [4Fe-4S] ''Pyrococcus furiosus'' ferredoxin. | ||
Revision as of 09:57, 7 April 2011
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This page complements a publication in scientific journals and is one of the Proteopedia's Interactive 3D Complement pages. For aditional details please see I3DC.
