TCDB is operated by the Saier Lab Bioinformatics Group
Transporter Information:
Name: ATP-binding cassette, sub-family D (ALD), member 1, pseudogene 4
Symbol: ABCD1P4
Locations: 22q11
GenBank: U90291
PubMed (9215666): Eichler EE, Budarf ML, Rocchi M, Deaven LL, Doggett NA, Baldini A, NelsonDL, Mohrenweiser HW. Interchromosomal duplications of the adrenoleukodystrophy locus: a phenomenonof pericentromeric plasticity.Hum Mol Genet. 1997 Jul;6(7):991-1002. PMID: 9215666 [PubMed - indexed for MEDLINE]

A 9.7 kb segment encompassing exons 7-10 of the adrenoleukodystrophy (ALD) locus of the X chromosome has duplicated to specific locations near the pericentromeric regions of human chromosomes 2p11,10p11, 16p11 and 22q11. Comparative sequence analysis reveals 92-96% nucleotide identity, indicating that the autosomal ALD paralogs arose relatively recently during the course of higher primate evolution (5-10 million years ago). Analysis of sequences flanking the duplication region identifies the presence of an unusual GCTTTTTGC repeat which may be a sequence-specific integration site for the process of pericentromeric-directed transposition. The breakpoint sequence and phylogenetic analysis predict a two-step transposition model, in which a duplication from Xq28 to pericentromeric 2p11 occurred once, followed by a rapid distribution of a larger duplicon cassette among the pericentromeric regions. In addition to facilitating more effective mutation detection among ALD patients, these findings provide further insight into the molecular basis underlying a pericentromeric-directed mechanism for non-homologous interchromosomal exchange.

PubMed (10591208): Dunham I, Shimizu N, Roe BA, Chissoe S, Hunt AR, Collins JE, Bruskiewich R,Beare DM, Clamp M, Smink LJ, Ainscough R, Almeida JP, Babbage A, Bagguley C,Bailey J, Barlow K, Bates KN, Beasley O, Bird CP, Blakey S, Bridgeman AM, BuckD, Burgess J, Burrill WD, O'Brien KP, et al. The DNA sequence of human chromosome 22.Nature. 1999 Dec 2;402(6761):489-95. Erratum in: Nature 2000 Apr20;404(6780):904. PMID: 10591208 [PubMed - indexed for MEDLINE]

Knowledge of the complete genomic DNA sequence of an organism allows a systematic approach to defining its genetic components. The genomic sequence provides access to the complete structures of all genes, including those without known function, their control elements, and, by inference, the proteins they encode, as well as all other biologically important sequences. Furthermore, the sequence is a rich and permanent source of information for the design of further biological studies of the organism and for the study of evolution through cross-species sequence comparison. The power of this approach has been amply demonstrated by the determination of the sequences of a number of microbial and model organisms. The next step is to obtain the complete sequence of the entire human genome. Here we report the sequence of the euchromatic part of human chromosome 22. The sequence obtained consists of 12 contiguous segments spanning 33.4 megabases, contains at least 545 genes and 134 pseudogenes, and provides the first view of the complex chromosomal landscapes that will be found in the rest of the genome.