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ATP binding cassette subfamily B member 7 (ABCB7)
- Target
- ABCB7
- Molecular classification
- Transporter, ATP-binding cassette transporter, Membrane protein, Iron-sulfur clusters transporter
01
Overview
ATP binding cassette subfamily B member 7 is a mitochondrial membrane-associated half-transporter whose primary function is the export of iron-sulfur clusters from the mitochondria to the cytosol, enabling the maturation of cytosolic Fe-S proteins and supporting iron homeostasis, heme biosynthesis, and red blood cell development. Dysfunction or mutation results in mitochondrial iron overload, anemia, ataxia, and impaired hematopoiesis. It is evolutionarily conserved and structurally related to bacterial transporters involved in metal-glutathione export
- Other names
- ABCB7_HUMANABC transporter 7 proteinASATAtm1pATP-binding cassette 7ATP-binding cassette sub-family B member 7, mitochondrialATP-binding cassette, sub-family B (MDR/TAP), member 7EST140535
02
Mechanism of action
Drugs or genetic interventions target ABCB7 function mainly by: - Modulating iron-sulfur cluster transport - Altering mitochondrial iron export - Affecting heme synthesis, with consequences for anemia and other pathologies
03
Biological functions
Iron homeostasisTransport of iron-sulfur cluster precursors (Fe-S clusters) from mitochondria to cytosolHeme biosynthesisRegulation of cellular reactive oxygen species (ROS) in specific cell types (e.g., cardiomyocytes)Hematopoiesis (blood cell production)
04
Disease associations
X-linked sideroblastic anemia with ataxiaSpinocerebellar ataxia, X-linked 6Mitochondrial iron accumulation disordersDefective hematopoiesis and related syndromes
05
Safety considerations
Therapeutic targeting presents challenges due to:Essential role in iron and heme metabolism (risk of anemia, mitochondrial dysfunction, neurodegenerative symptoms)Ubiquity of iron-sulfur cluster proteins and broad physiological impacts
06
Interacting drugs
There are currently no approved drugs directly targeting ABCB7 for therapeutic use; interaction studies tend to focus on genetic and biochemical inhibition or mutation models.
07
Biomarkers
Mutations in ABCB7 serve as genetic biomarkers for:X-linked sideroblastic anemia with ataxiaMitochondrial iron overload in patient samples
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