ABCB7

ABCB7
Identifiers
Aliases	ABCB7, AA517758, AU019072, Abc7, ASAT, Atm1p, EST140535, ATP binding cassette subfamily B member 7
External IDs	OMIM: 300135; MGI: 109533; HomoloGene: 3175; GeneCards: ABCB7; OMA:ABCB7 - orthologs
Gene location (Human) Chr. X chromosome (human) Band Xq13.3 Start 75,051,048 bp End 75,156,732 bp
Gene location (Mouse) Chr. X chromosome (mouse) Band X D|X 46.58 cM Start 103,324,263 bp End 103,457,462 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in muscle of arm biceps brachii glutes triceps brachii muscle gastrocnemius muscle Skeletal muscle tissue of biceps brachii monocyte left ventricle muscle of thigh jejunal mucosa Top expressed in digastric muscle triceps brachii muscle temporal muscle sternocleidomastoid muscle vastus lateralis muscle tibialis anterior muscle right ventricle knee joint soleus muscle extraocular muscle More reference expression data BioGPS More reference expression data
Gene ontology Molecular function nucleotide binding heme transmembrane transporter activity ATPase activity ATPase-coupled transmembrane transporter activity ATP binding Cellular component membrane mitochondrial inner membrane mitochondrion integral component of membrane Biological process transmembrane transport cellular iron ion homeostasis heme transport Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 22 11306 Ensembl ENSG00000131269 ENSMUSG00000031333 UniProt O75027 Q61102 RefSeq (mRNA) NM_004299 NM_001271696 NM_001271697 NM_001271698 NM_001271699 NM_009592 RefSeq (protein) NP_001258625 NP_001258626 NP_001258627 NP_001258628 NP_004290 NP_001258627.1 NP_033722 Location (UCSC) Chr X: 75.05 – 75.16 Mb Chr X: 103.32 – 103.46 Mb PubMed search
Wikidata
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ATP-binding cassette sub-family B member 7, mitochondrial is a protein that in humans is encoded by the ABCB7 gene.

Function

The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance as well as antigen presentation. This gene encodes a half-transporter involved in the transport of heme from the mitochondria to the cytosol. With iron/sulfur cluster precursors as its substrates, this protein may play a role in metal homeostasis.

Clinical significance

Mutations in this gene have been implicated in X-linked sideroblastic anemia with ataxia.

Interactions

ABCB7 has been shown to interact with Ferrochelatase.

See also

• ATP-binding cassette transporter

Further reading

• Allikmets R, Gerrard B, Hutchinson A, Dean M (1997). "Characterization of the human ABC superfamily: isolation and mapping of 21 new genes using the expressed sequence tags database". Hum. Mol. Genet. 5 (10): 1649–55. doi:10.1093/hmg/5.10.1649. PMID 8894702.
• Shimada Y, Okuno S, Kawai A, Shinomiya H, Saito A, Suzuki M, Omori Y, Nishino N, Kanemoto N, Fujiwara T, Horie M, Takahashi E (1998). "Cloning and chromosomal mapping of a novel ABC transporter gene (hABC7), a candidate for X-linked sideroblastic anemia with spinocerebellar ataxia". J. Hum. Genet. 43 (2): 115–22. doi:10.1007/s100380050051. PMID 9621516.
• Mao M, Fu G, Wu JS, Zhang QH, Zhou J, Kan LX, Huang QH, He KL, Gu BW, Han ZG, Shen Y, Gu J, Yu YP, Xu SH, Wang YX, Chen SJ, Chen Z (1998). "Identification of genes expressed in human CD34+ hematopoietic stem/progenitor cells by expressed sequence tags and efficient full-length cDNA cloning". Proc. Natl. Acad. Sci. U.S.A. 95 (14): 8175–80. doi:10.1073/pnas.95.14.8175. PMC 20949. PMID 9653160.
• Csere P, Lill R, Kispal G (1999). "Identification of a human mitochondrial ABC transporter, the functional orthologue of yeast Atm1p". FEBS Lett. 441 (2): 266–70. doi:10.1016/S0014-5793(98)01560-9. PMID 9883897.
• Allikmets R, Raskind WH, Hutchinson A, Schueck ND, Dean M, Koeller DM (1999). "Mutation of a putative mitochondrial iron transporter gene (ABC7) in X-linked sideroblastic anemia and ataxia (XLSA/A)". Hum. Mol. Genet. 8 (5): 743–9. doi:10.1093/hmg/8.5.743. PMID 10196363.
• Zhang QH, Ye M, Wu XY, Ren SX, Zhao M, Zhao CJ, Fu G, Shen Y, Fan HY, Lu G, Zhong M, Xu XR, Han ZG, Zhang JW, Tao J, Huang QH, Zhou J, Hu GX, Gu J, Chen SJ, Chen Z (2001). "Cloning and Functional Analysis of cDNAs with Open Reading Frames for 300 Previously Undefined Genes Expressed in CD34+ Hematopoietic Stem/Progenitor Cells". Genome Res. 10 (10): 1546–60. doi:10.1101/gr.140200. PMC 310934. PMID 11042152.
• Bekri S, Kispal G, Lange H, Fitzsimons E, Tolmie J, Lill R, Bishop DF (2000). "Human ABC7 transporter: gene structure and mutation causing X-linked sideroblastic anemia with ataxia with disruption of cytosolic iron-sulfur protein maturation". Blood. 96 (9): 3256–64. PMID 11050011.
• Maguire A, Hellier K, Hammans S, May A (2002). "X-linked cerebellar ataxia and sideroblastic anaemia associated with a missense mutation in the ABC7 gene predicting V411L". Br. J. Haematol. 115 (4): 910–7. doi:10.1046/j.1365-2141.2001.03015.x. PMID 11843825.
• Taketani S, Kakimoto K, Ueta H, Masaki R, Furukawa T (2003). "Involvement of ABC7 in the biosynthesis of heme in erythroid cells: interaction of ABC7 with ferrochelatase". Blood. 101 (8): 3274–80. doi:10.1182/blood-2002-04-1212. PMID 12480705.

External links

• GeneReviews/NIH/NCBI/UW entry on X-Linked Sideroblastic Anemia and Ataxia
• ABCB7+protein,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
• ABCB7 human gene location in the UCSC Genome Browser.
• ABCB7 human gene details in the UCSC Genome Browser.

This article incorporates text from the United States National Library of Medicine, which is in the public domain.