1qlb

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[[Image:1qlb.jpg|left|200px]]
[[Image:1qlb.jpg|left|200px]]
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{{Structure
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<!--
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|PDB= 1qlb |SIZE=350|CAPTION= <scene name='initialview01'>1qlb</scene>, resolution 2.33&Aring;
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The line below this paragraph, containing "STRUCTURE_1qlb", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=FA1:Fad+Covalent+Bond+To+Protein+For+Chain+A'>FA1</scene>, <scene name='pdbsite=FA2:Fad+Covalent+Bond+To+Protein+For+Chain+D'>FA2</scene>, <scene name='pdbsite=FS1:Fe4s4+Fe+Sulphur+Centre+Ligands+For+Chain+B'>FS1</scene>, <scene name='pdbsite=FS2:Fe4s4+Fe+Sulphur+Centre+Ligands+For+Chain+E'>FS2</scene>, <scene name='pdbsite=FS3:Fe2s2+Fe+Sulphur+Centre+Ligands+For+Chain+B'>FS3</scene>, <scene name='pdbsite=FS4:Fe2s2+Fe+Sulphur+Centre+Ligands+For+Chain+E'>FS4</scene>, <scene name='pdbsite=FS5:Fe3s4+Fe+Sulphur+Centre+Ligands+For+Chain+B'>FS5</scene>, <scene name='pdbsite=FS6:Fe3s4+Fe+Sulphur+Centre+Ligands+For+Chain+E'>FS6</scene>, <scene name='pdbsite=HE1:Haem+Axial+Ligands+For+Chain+C'>HE1</scene> and <scene name='pdbsite=HE2:Haem+Axial+Ligands+For+Chain+F'>HE2</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=F3S:FE3-S4+CLUSTER'>F3S</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=FMR:FUMARATE'>FMR</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Succinate_dehydrogenase Succinate dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.3.99.1 1.3.99.1] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE=
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-->
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|DOMAIN=
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{{STRUCTURE_1qlb| PDB=1qlb | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1qlb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1qlb OCA], [http://www.ebi.ac.uk/pdbsum/1qlb PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1qlb RCSB]</span>
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}}
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'''RESPIRATORY COMPLEX II-LIKE FUMARATE REDUCTASE FROM WOLINELLA SUCCINOGENES'''
'''RESPIRATORY COMPLEX II-LIKE FUMARATE REDUCTASE FROM WOLINELLA SUCCINOGENES'''
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[[Category: Lancaster, C R.D.]]
[[Category: Lancaster, C R.D.]]
[[Category: Michel, H.]]
[[Category: Michel, H.]]
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[[Category: citric acid cycle]]
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[[Category: Citric acid cycle]]
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[[Category: dihaem cytochrome b]]
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[[Category: Dihaem cytochrome b]]
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[[Category: flavoprotein]]
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[[Category: Flavoprotein]]
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[[Category: fumarate reductase]]
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[[Category: Fumarate reductase]]
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[[Category: iron-sulphur protein]]
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[[Category: Iron-sulphur protein]]
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[[Category: respiratory chain]]
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[[Category: Respiratory chain]]
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[[Category: succinate dehydrogenase]]
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[[Category: Succinate dehydrogenase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 06:24:37 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:15:20 2008''
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Revision as of 03:24, 3 May 2008

Image:1qlb.jpg

Template:STRUCTURE 1qlb

RESPIRATORY COMPLEX II-LIKE FUMARATE REDUCTASE FROM WOLINELLA SUCCINOGENES


Overview

Fumarate reductase couples the reduction of fumarate to succinate to the oxidation of quinol to quinone, in a reaction opposite to that catalysed by the related complex II of the respiratory chain (succinate dehydrogenase). Here we describe the crystal structure at 2.2 A resolution of the three protein subunits containing fumarate reductase from the anaerobic bacterium Wolinella succinogenes. Subunit A contains the site of fumarate reduction and a covalently bound flavin adenine dinucleotide prosthetic group. Subunit B contains three iron-sulphur centres. The menaquinol-oxidizing subunit C consists of five membrane-spanning, primarily helical segments and binds two haem b molecules. On the basis of the structure, we propose a pathway of electron transfer from the dihaem cytochrome b to the site of fumarate reduction and a mechanism of fumarate reduction. The relative orientations of the soluble and membrane-embedded subunits of succinate:quinone oxidoreductases appear to be unique.

About this Structure

1QLB is a Protein complex structure of sequences from Wolinella succinogenes. Full crystallographic information is available from OCA.

Reference

Structure of fumarate reductase from Wolinella succinogenes at 2.2 A resolution., Lancaster CR, Kroger A, Auer M, Michel H, Nature. 1999 Nov 25;402(6760):377-85. PMID:10586875 Page seeded by OCA on Sat May 3 06:24:37 2008

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