Abstract:
:The intron-exon organization of the human beta-adducin gene (ADD2) has been determined from overlapping genomic clones. The gene spans over 100 kb on chromosome 2p13 and comprises 17 exons. Seven of the exons are identical in size to the corresponding exons of the alpha-adducin gene (4p16.3), suggesting gene duplication. A 275-bp fragment 5' to exon 1 demonstrates strong promoter activity in a transient transfection assay. Within 333 bp 5' of the first exon can be found several putative transcription factor-binding sites: three SP1 sites, one GATA site, three MZF1 sites, one p300 site, and one c-Ets site. Alternatively spliced exons in the 3' region are described and contain distinct coding regions, stop codons, and 3'UTR, corresponding to previously published beta-adducin cDNA sequences beta-1 and beta-2. The alternative splice sites for the smallest adducin isoform, beta-3, are alternative donor and acceptor sites within exons 7 and 12. The most recently described isoform, beta-4, includes an alternative exon (exon 15) that results in a frame shift and early termination. Intron-exon splice sites are presented for all 17 exons and conform to the consensus sequences for mammalian splice sites. These results will be useful in further analysis of tissue-specific expression of adducin isoforms and in analysis of DNA from patients with diseases mapping to this region of chromosome 2.
journal_name
Genomicsjournal_title
Genomicsauthors
Gilligan DM,Lozovatsky L,Silberfein Adoi
10.1006/geno.1997.4802subject
Has Abstractpub_date
1997-07-15 00:00:00pages
141-8issue
2eissn
0888-7543issn
1089-8646pii
S0888-7543(97)94802-3journal_volume
43pub_type
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