Abstract:
:Overlapping DNA fragments spanning approximately 21 kb of genomic DNA and encompassing the human 4-hydroxyphenylpyruvate dioxygenase gene (HPD) have been cloned by screening a human leukocyte genomic library and by PCR amplification of human fibroblastic DNA. A continuous gene sequence of 20,890 nucleotides was established, including 1957 bp of the 5'-flanking region. The 4-hydroxyphenylpyruvate dioxygenase gene is composed of 14 exons interrupted by 13 introns, all exhibiting conventional vertebrate splicing. Computer analysis of the DNA sequence revealed 12 complete repetitive Alu elements, 1 in the 5'-flanking region and 11 in the intervening segments of the gene. The transcriptional initiation site was mapped to a position 35 nt upstream of the translational start point. The computer analysis also identified several potential transcription regulatory elements, including one CRE site, two AP-2 sites, and two Sp1 sites, in the sequence upstream of the transcription initiation site. Functional analysis of promoter activity by transient transfection of chloramphenicolacetyl transferase reporter plasmids revealed a possible involvement of cyclic adenosine monophosphate in the regulation of transcription. The highest level of expression of 4-hydroxyphenylpyruvate dioxygenase was found in human liver tissue as demonstrated by Northern blot analysis.
journal_name
Genomicsjournal_title
Genomicsauthors
Rüetschi U,Rymo L,Lindstedt Sdoi
10.1006/geno.1997.4887subject
Has Abstractpub_date
1997-09-15 00:00:00pages
292-9issue
3eissn
0888-7543issn
1089-8646pii
S0888-7543(97)94887-4journal_volume
44pub_type
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