ATP-binding cassette sub-family D member 4 is a protein that in humans is encoded by the ABCD4gene.
The 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 ALD subfamily, which is involved in peroxisomal import of fatty acids and/or fatty acyl-CoAs in the organelle. All known peroxisomal ABC transporters are half transporters which require a partner half transporter molecule to form a functional homodimeric or heterodimeric transporter. The function of this peroxisomal membrane protein is unknown. However, it is speculated that it may function as a heterodimer for another peroxisomal ABC transporter and, therefore, may modify the adrenoleukodystrophy phenotype. It may also play a role in the process of peroxisome biogenesis. Alternative splicing results in at least two different transcript variants, one which is protein-coding and one which is probably not protein-coding.
^Holzinger A, Kammerer S, Roscher AA (Sep 1997). "Primary structure of human PMP69, a putative peroxisomal ABC-transporter". Biochem Biophys Res Commun237 (1): 152–7. doi:10.1006/bbrc.1997.7102. PMID9266848.
^Shani N, Jimenez-Sanchez G, Steel G, Dean M, Valle D (Jan 1998). "Identification of a fourth half ABC transporter in the human peroxisomal membrane". Hum Mol Genet6 (11): 1925–31. doi:10.1093/hmg/6.11.1925. PMID9302272.
Gärtner J, Jimenez-Sanchez G, Roerig P, Valle D (1998). "Genomic organization of the 70-kDa peroxisomal membrane protein gene (PXMP1)". Genomics48 (2): 203–8. doi:10.1006/geno.1997.5177. PMID9521874.
Holzinger A, Roscher AA, Landgraf P et al. (1998). "Genomic organization and chromosomal localization of the human peroxisomal membrane protein-1-like protein (PXMP1-L) gene encoding a peroxisomal ABC transporter". FEBS Lett.426 (2): 238–42. doi:10.1016/S0014-5793(98)00354-8. PMID9599016.
Iida A, Saito S, Sekine A et al. (2002). "Catalog of 605 single-nucleotide polymorphisms (SNPs) among 13 genes encoding human ATP-binding cassette transporters: ABCA4, ABCA7, ABCA8, ABCD1, ABCD3, ABCD4, ABCE1, ABCF1, ABCG1, ABCG2, ABCG4, ABCG5, and ABCG8". J. Hum. Genet.47 (6): 285–310. doi:10.1007/s100380200041. PMID12111378.
Asheuer M, Bieche I, Laurendeau I et al. (2005). "Decreased expression of ABCD4 and BG1 genes early in the pathogenesis of X-linked adrenoleukodystrophy". Hum. Mol. Genet.14 (10): 1293–303. doi:10.1093/hmg/ddi140. PMID15800013.
Kuiper H, Spötter A, Williams JL et al. (2005). "Physical mapping of CHX10, ALDH6A1, and ABCD4 on bovine chromosome 10q34". Cytogenet. Genome Res.109 (4): 533. doi:10.1159/000084217. PMID15909363.