1qlb

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spinqualitylabelsall models 1qlb, resolution 2.33Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

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, ... [(full description)]

About this Structure

1QLB is a [Protein complex] structure of sequences from [Wolinella succinogenes] with CA, HEM, FES, F3S, SF4, FAD, FMR and LMT as [ligands]. Active as [Succinate dehydrogenase], with EC number [1.3.99.1]. Structure known Active Sites: FA1, FA2, FS1, FS2, FS3, FS4, FS5, FS6, HE1 and HE2. 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

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