Sequence and expression of the MnP4 gene encoding basic proline-rich protein in macaque salivary glands.
We report here the macaque MnP4 cDNA and genomic sequences which encode a basic proline-rich protein (PRP), which is synthesized in macaque parotid gland and submandibular gland. The locations of intron positions and the prototype of the tandem 20-amino-acid repeat motif with the sequence, PPPPGKPQGPPQQGGNKPQG, in MnP4, were compared to those in related genes encoding PRP and glutamic/glutamine-rich proteins (GRP) in humans and rodents. Exceedingly high homology of the first exon and 40-bp region immediately upstream of exon I is observed with other PRP genes of all species studied. In order to identify the regulatory elements involved in control of MnP4 gene expression, a rat submandibular gland-derived cell line (RSMT-A5) was transfected with MnP4-cat constructs that contained the promoter and 5'-flanking regions of the macaque MnP4 gene fused to the bacterial cat gene. Deletion analysis revealed that putative positive and negative regulatory elements reside between nucleotides (nt) -107 and +5, and nt -586 and -108, respectively. As part of this study, the promoter of the macaque MnP4 gene appears to be salivary gland specific. This salivary gland-specific gene expression attests to the complexity of transcriptional regulation in eukaryotes.
Department of Pharmacology, University of Minnesota, Medical School, Minneapolis 55455.
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D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D002478:Cells, Cultured; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics; D003001:Cloning, Molecular; D004247:DNA; D005786:Gene Expression Regulation; D008252:Macaca fascicularis; D008969:Molecular Sequence Data; D010452:Peptide Biosynthesis; D010455:Peptides / Q000235:genetics*; D011392:Proline; D055232:Proline-Rich Protein Domains; D012091:Repetitive Sequences, Nucleic Acid; D015183:Restriction Mapping; D012469:Salivary Glands / Q000378:metabolism; D012471:Salivary Proteins and Peptides / Q000235:genetics*; D014158:Transcription, Genetic; D014162:Transfection
D010455:Peptides; D012471:Salivary Proteins and Peptides; D004247:DNA; D011392:Proline; D015500:Chloramphenicol O-Acetyltransferase