PMID: 6985477Oct 1, 1980Paper

The structure and evolution of the human beta-globin gene family

Cell
A EfstratiadisN J Proudfoot

Abstract

We present the results of a detailed comparison of the primary structure of human beta-like globin genes and their flanking sequences. Among the sequences located 5' to these genes are two highly conserved regions which include the sequences ATA and CCAAT located 31 +/- 1 and 77 +/- 10 bp, respectively, 5' to the mRNA capping site. Similar sequences are found in the corresponding locations in most other eucaryotic structural genes. Calculation of the divergence times of individual beta-like globin gene pairs provides the first description of the evolutionary relationships within a gene family based entirely on direct nucleotide sequence comparisons. In addition, the evolutionary relationship of the embryonic epsilon-globin gene to the other human beta-like globin genes is defined for the first time. Finally, we describe a model for the involvement of short direct repeat sequences in the generation of deletions in the noncoding and coding regions of beta-like globin genes during evolution.

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