Murine osteogenic protein (OP-1): high levels of mRNA in kidney.
The murine OP-1 gene (EMBL accession No. X56906) encoding the homolog of human osteogenic protein-1 was isolated from cDNA and genomic libraries using human OP-1 cDNA as probe. The deduced murine OP-1 amino acid sequence revealed 11 amino acids changes, three of them in the mature protein. Murine OP-1 probes were used for analysis of OP-1 mRNA in mouse embryo and organ tissues. Northern blot hybridization revealed multiple mRNA species: the major species of 2.2 kb, minor species of 1.8 and 2.4 kb and a large 4 kb species, which may represent alternative splices. Tissue specific expression was studied in brain, lung, heart, liver, spleen, kidney, adrenal and bladder tissue. Maximal levels of OP-1 mRNA were found in kidney which may explain the phenomenon of epithelial osteogenesis, first described by Huggins in 1931 using epithelium from the urinary tract. Moreover, our data suggest that kidneys may be the main site of OP-1 synthesis, even though it is distant from its physiological site of action, skeletal bone.
Ozkaynak
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Creative BioMolecules, Inc., Hopkinton, Massachusetts 01748.
Schnegelsberg
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Oppermann
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D000595:Amino Acid Sequence; D000818:Animals; D015152:Blotting, Northern; D055419:Bone Morphogenetic Protein 7; D019485:Bone Morphogenetic Proteins; D004622:Embryo, Mammalian; D015870:Gene Expression; D006801:Humans; D007668:Kidney / Q000502:physiology*; D051379:Mice; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D010444:Peptide Elongation Factor Tu / Q000235:genetics; D011498:Protein Precursors / Q000235:genetics; D011506:Proteins / Q000235:genetics*; D012313:RNA / Q000235:genetics / Q000302:isolation & purification; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics*; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid; D014158:Transcription, Genetic; D016212:Transforming Growth Factor beta / Q000235:genetics
C525819:BMP7 protein, human; D055419:Bone Morphogenetic Protein 7; D019485:Bone Morphogenetic Proteins; D011498:Protein Precursors; D011506:Proteins; D012333:RNA, Messenger; D016212:Transforming Growth Factor beta; D012313:RNA; D010444:Peptide Elongation Factor Tu