Journal
BIOCHEMICAL SOCIETY TRANSACTIONS
Volume 43, Issue -, Pages 943-951Publisher
PORTLAND PRESS LTD
DOI: 10.1042/BST20150118
Keywords
ATP-binding cassette (ABC) transporter; glutathione; haem; iron; mitochondria; oxidative stress
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Funding
- BBSRC [BB/H00288X/1, BB/K008838/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/K008838/1, BB/H00288X/1] Funding Source: researchfish
- Medical Research Council [1370086] Funding Source: researchfish
- Biotechnology and Biological Sciences Research Council [BB/H00288X/1] Funding Source: Medline
- Wellcome Trust [106169] Funding Source: Medline
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A small number of physiologically important ATP-binding cassette (ABC) transporters are found in mitochondria. Most are half transporters of the B group forming homodimers and their topology suggests they function as exporters. The results of mutant studies point towards involvement in iron cofactor biosynthesis. In particular, ABC subfamily B member 7 (ABCB7) and its homologues in yeast and plants are required for iron-sulfur (Fe-S) cluster biosynthesis outside of the mitochondria, whereas ABCB10 is involved in haem biosynthesis. They also play a role in preventing oxidative stress. Mutations in ABCB6 and ABCB7 have been linked to human disease. Recent crystal structures of yeast Atm1 and human ABCB10 have been key to identifying substrate-binding sites and transport mechanisms. Combined with in vitro and in vivo studies, progress is being made to find the physiological substrates of the different mitochondrial ABC transporters.
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