4ysz

Structural highlights

Function

SDHB_ASCSU Iron-sulfur protein (Ip) subunit of the mitochondrial electron transport chain complex II which, together with the flavoprotein (Fp) subunit forms the catalytic core of the complex (PubMed:10743611, PubMed:12742584, PubMed:17933581, PubMed:2843227, PubMed:7822332, PubMed:8435436). During the free-living egg-larvae stages, which occur in an aerobic environment, complex II acts as a succinate dehydrogenase by transferring electrons from succinate to ubiquinone (PubMed:10743611, PubMed:12742584, PubMed:17933581, PubMed:2843227, PubMed:7822332, PubMed:8435436). During the parasitic larvae and adult stages, which occur in an anaerobic environment, complex II acts as a fumarate reductase by transferring electrons from rhodoquinol to fumarate (PubMed:10743611, PubMed:12742584, PubMed:17933581, PubMed:2843227, PubMed:7822332, PubMed:8435436).^{[1] [2] [3] [4] [5] [6]}

See Also

• Succinate dehydrogenase 3D structures

References

1. ↑ Amino H, Wang H, Hirawake H, Saruta F, Mizuchi D, Mineki R, Shindo N, Murayama K, Takamiya S, Aoki T, Kojima S, Kita K. Stage-specific isoforms of Ascaris suum complex. II: The fumarate reductase of the parasitic adult and the succinate dehydrogenase of free-living larvae share a common iron-sulfur subunit. Mol Biochem Parasitol. 2000 Feb 25;106(1):63-76. PMID:10743611 doi:10.1016/s0166-6851(99)00200-5
2. ↑ Amino H, Osanai A, Miyadera H, Shinjyo N, Tomitsuka E, Taka H, Mineki R, Murayama K, Takamiya S, Aoki T, Miyoshi H, Sakamoto K, Kojima S, Kita K. Isolation and characterization of the stage-specific cytochrome b small subunit (CybS) of Ascaris suum complex II from the aerobic respiratory chain of larval mitochondria. Mol Biochem Parasitol. 2003 May;128(2):175-86. PMID:12742584 doi:10.1016/s0166-6851(03)00074-4
3. ↑ Iwata F, Shinjyo N, Amino H, Sakamoto K, Islam MK, Tsuji N, Kita K. Change of subunit composition of mitochondrial complex II (succinate-ubiquinone reductase/quinol-fumarate reductase) in Ascaris suum during the migration in the experimental host. Parasitol Int. 2008 Mar;57(1):54-61. PMID:17933581 doi:10.1016/j.parint.2007.08.002
4. ↑ Kita K, Takamiya S, Furushima R, Ma YC, Suzuki H, Ozawa T, Oya H. Electron-transfer complexes of Ascaris suum muscle mitochondria. III. Composition and fumarate reductase activity of complex II. Biochim Biophys Acta. 1988 Sep 14;935(2):130-40. PMID:2843227 doi:10.1016/0005-2728(88)90210-1
5. ↑ Saruta F, Kuramochi T, Nakamura K, Takamiya S, Yu Y, Aoki T, Sekimizu K, Kojima S, Kita K. Stage-specific isoforms of complex II (succinate-ubiquinone oxidoreductase) in mitochondria from the parasitic nematode, Ascaris suum. J Biol Chem. 1995 Jan 13;270(2):928-32. PMID:7822332 doi:10.1074/jbc.270.2.928
6. ↑ Takamiya S, Kita K, Wang H, Weinstein PP, Hiraishi A, Oya H, Aoki T. Developmental changes in the respiratory chain of Ascaris mitochondria. Biochim Biophys Acta. 1993 Feb 8;1141(1):65-74. PMID:8435436 doi:10.1016/0005-2728(93)90190-q
7. ↑ Inaoka DK, Shiba T, Sato D, Balogun EO, Sasaki T, Nagahama M, Oda M, Matsuoka S, Ohmori J, Honma T, Inoue M, Kita K, Harada S. Structural Insights into the Molecular Design of Flutolanil Derivatives Targeted for Fumarate Respiration of Parasite Mitochondria. Int J Mol Sci. 2015 Jul 7;16(7):15287-308. doi: 10.3390/ijms160715287. PMID:26198225 doi:http://dx.doi.org/10.3390/ijms160715287