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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Molecular cloning and chromosomal localization of a pseudogene related to the human acyl-CoA binding protein/diazepam binding inhibitor.

The acyl-CoA binding protein (ACBP) and the diazepam binding inhibitor (DBI) or endozepine are independent isolates of a single 86-amino-acid, 10-kDa protein. ACBP/DBI is highly conserved between species and has been identified in several diverse organisms, including human, cow, rat, frog, duck, insects, plants, and yeast. Although the genomic locus has not yet been cloned in humans, complementary DNA clones with different 5' ends have been isolated and characterized. These cDNA clones appear to be encoded by a single gene. However, Southern blot analyses, in situ hybridizations, and somatic cell hybrid chromosomal mapping all suggest that there are multiple ACBP/DBI-related sequences in the genome. To identify potential members of this gene family, degenerate oligonucleotides corresponding to highly conserved regions of ACBP/DBI were used to screen a human genomic DNA library using the polymerase chain reaction. A novel gene, DBIP1, that is closely related to ACBP/DBI but is clearly distinct was identified. DBIP1 bears extensive sequence homology to ACBP/DBI but lacks the introns predicted by rat and duck genomic sequence studies. A 1-base deletion in the coding region results in a frameshift and, along with the absence of introns and the lack of a detectable transcript, suggests that DBIP1 is a pseudogene. ACBP/DBI has previously been mapped to chromosome 2, although this was recently disputed, and a chromosome 6 location was suggested. We show that ACBP/DBI is correctly placed on chromosome 2 and that the gene identified on chromosome 6 is DBIP1.[1]

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