Abstract
We have isolated DNA clones containing the interferon (IFN)-inducible guanylate-binding protein-1-encoding gene ( GBP1) from a human genomic library. Two overlapping phage clones contained the entire GBP1 gene. The 2880 bp corresponding to the GBP1 cDNA were subdivided into eleven exons which were interrupted by a total of 9500 bp of intron DNA. All exon/intron junctions contained consensus splice donor and acceptor sequences. Using hybrid rodent cell lines containing human chromosomes, GBP1 was mapped to human chromosome 1. In addition to GBP1, we detected and partially characterized a novel gene, GBP3, with a structure related to GBP1 and a high degree of sequence homology to both GBP1 and GBP2. Our data suggest that the GBP family of genes contains members other than the previously characterized GBP1 and GBP2.
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