Structural highlights
1nek is a 4 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. The October 2012 RCSB PDB Molecule of the Month feature on Citric Acid Cycle by David Goodsell is 10.2210/rcsb_pdb/mom_2012_10. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , , , , , , , , |
| Related: | 1nen |
| Gene: | SDHA OR B0723 OR Z0877 OR ECS0748 ("Bacillus coli" Migula 1895), SDHB OR B0724 ("Bacillus coli" Migula 1895), SDHC OR CYBA OR B0721 OR Z0875 OR ECS0746 ("Bacillus coli" Migula 1895), SDHD OR B0722 ("Bacillus coli" Migula 1895) |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[DHSD_ECOLI] Membrane-anchoring subunit of succinate dehydrogenase (SDH). [DHSA_ECOLI] Two distinct, membrane-bound, FAD-containing enzymes are responsible for the catalysis of fumarate and succinate interconversion; the fumarate reductase is used in anaerobic growth, and the succinate dehydrogenase is used in aerobic growth. [DHSC_ECOLI] Membrane-anchoring subunit of succinate dehydrogenase (SDH). [DHSB_ECOLI] Two distinct, membrane-bound, FAD-containing enzymes are responsible for the catalysis of fumarate and succinate interconversion; the fumarate reductase is used in anaerobic growth, and the succinate dehydrogenase is used in aerobic growth.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The structure of Escherichia coli succinate dehydrogenase (SQR), analogous to the mitochondrial respiratory complex II, has been determined, revealing the electron transport pathway from the electron donor, succinate, to the terminal electron acceptor, ubiquinone. It was found that the SQR redox centers are arranged in a manner that aids the prevention of reactive oxygen species (ROS) formation at the flavin adenine dinucleotide. This is likely to be the main reason SQR is expressed during aerobic respiration rather than the related enzyme fumarate reductase, which produces high levels of ROS. Furthermore, symptoms of genetic disorders associated with mitochondrial SQR mutations may be a result of ROS formation resulting from impaired electron transport in the enzyme.
Architecture of succinate dehydrogenase and reactive oxygen species generation.,Yankovskaya V, Horsefield R, Tornroth S, Luna-Chavez C, Miyoshi H, Leger C, Byrne B, Cecchini G, Iwata S Science. 2003 Jan 31;299(5607):700-4. PMID:12560550[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Yankovskaya V, Horsefield R, Tornroth S, Luna-Chavez C, Miyoshi H, Leger C, Byrne B, Cecchini G, Iwata S. Architecture of succinate dehydrogenase and reactive oxygen species generation. Science. 2003 Jan 31;299(5607):700-4. PMID:12560550 doi:10.1126/science.1079605
